gadget.c revision b09e99ee7c2b7ee80cca128b93b07fb830e6ecad
172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/** 272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * gadget.c - DesignWare USB3 DRD Controller Gadget Framework Link 372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com 572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Authors: Felipe Balbi <balbi@ti.com>, 772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Sebastian Andrzej Siewior <bigeasy@linutronix.de> 872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 95945f789c864d8676b297880cc6961fea4511a7aFelipe Balbi * This program is free software: you can redistribute it and/or modify 105945f789c864d8676b297880cc6961fea4511a7aFelipe Balbi * it under the terms of the GNU General Public License version 2 of 115945f789c864d8676b297880cc6961fea4511a7aFelipe Balbi * the License as published by the Free Software Foundation. 1272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 135945f789c864d8676b297880cc6961fea4511a7aFelipe Balbi * This program is distributed in the hope that it will be useful, 145945f789c864d8676b297880cc6961fea4511a7aFelipe Balbi * but WITHOUT ANY WARRANTY; without even the implied warranty of 155945f789c864d8676b297880cc6961fea4511a7aFelipe Balbi * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 165945f789c864d8676b297880cc6961fea4511a7aFelipe Balbi * GNU General Public License for more details. 1772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 1872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/kernel.h> 2072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/delay.h> 2172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/slab.h> 2272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/spinlock.h> 2372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/platform_device.h> 2472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/pm_runtime.h> 2572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/interrupt.h> 2672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/io.h> 2772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/list.h> 2872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/dma-mapping.h> 2972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 3072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/usb/ch9.h> 3172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/usb/gadget.h> 3272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 3372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include "core.h" 3472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include "gadget.h" 3572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include "io.h" 3672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 3704a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi/** 3804a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi * dwc3_gadget_set_test_mode - Enables USB2 Test Modes 3904a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi * @dwc: pointer to our context structure 4004a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi * @mode: the mode to set (J, K SE0 NAK, Force Enable) 4104a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi * 4204a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi * Caller should take care of locking. This function will 4304a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi * return 0 on success or -EINVAL if wrong Test Selector 4404a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi * is passed 4504a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi */ 4604a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbiint dwc3_gadget_set_test_mode(struct dwc3 *dwc, int mode) 4704a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi{ 4804a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi u32 reg; 4904a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi 5004a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 5104a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi reg &= ~DWC3_DCTL_TSTCTRL_MASK; 5204a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi 5304a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi switch (mode) { 5404a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi case TEST_J: 5504a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi case TEST_K: 5604a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi case TEST_SE0_NAK: 5704a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi case TEST_PACKET: 5804a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi case TEST_FORCE_EN: 5904a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi reg |= mode << 1; 6004a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi break; 6104a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi default: 6204a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi return -EINVAL; 6304a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi } 6404a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi 6504a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 6604a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi 6704a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi return 0; 6804a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi} 6904a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi 708598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi/** 71911f1f88cadf4b64bad5aa4c257d72494a62f928Paul Zimmerman * dwc3_gadget_get_link_state - Gets current state of USB Link 72911f1f88cadf4b64bad5aa4c257d72494a62f928Paul Zimmerman * @dwc: pointer to our context structure 73911f1f88cadf4b64bad5aa4c257d72494a62f928Paul Zimmerman * 74911f1f88cadf4b64bad5aa4c257d72494a62f928Paul Zimmerman * Caller should take care of locking. This function will 75911f1f88cadf4b64bad5aa4c257d72494a62f928Paul Zimmerman * return the link state on success (>= 0) or -ETIMEDOUT. 76911f1f88cadf4b64bad5aa4c257d72494a62f928Paul Zimmerman */ 77911f1f88cadf4b64bad5aa4c257d72494a62f928Paul Zimmermanint dwc3_gadget_get_link_state(struct dwc3 *dwc) 78911f1f88cadf4b64bad5aa4c257d72494a62f928Paul Zimmerman{ 79911f1f88cadf4b64bad5aa4c257d72494a62f928Paul Zimmerman u32 reg; 80911f1f88cadf4b64bad5aa4c257d72494a62f928Paul Zimmerman 81911f1f88cadf4b64bad5aa4c257d72494a62f928Paul Zimmerman reg = dwc3_readl(dwc->regs, DWC3_DSTS); 82911f1f88cadf4b64bad5aa4c257d72494a62f928Paul Zimmerman 83911f1f88cadf4b64bad5aa4c257d72494a62f928Paul Zimmerman return DWC3_DSTS_USBLNKST(reg); 84911f1f88cadf4b64bad5aa4c257d72494a62f928Paul Zimmerman} 85911f1f88cadf4b64bad5aa4c257d72494a62f928Paul Zimmerman 86911f1f88cadf4b64bad5aa4c257d72494a62f928Paul Zimmerman/** 878598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi * dwc3_gadget_set_link_state - Sets USB Link to a particular State 888598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi * @dwc: pointer to our context structure 898598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi * @state: the state to put link into 908598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi * 918598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi * Caller should take care of locking. This function will 92aee63e3cb6b0396b99c6387a47cb90a7417f3957Paul Zimmerman * return 0 on success or -ETIMEDOUT. 938598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi */ 948598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbiint dwc3_gadget_set_link_state(struct dwc3 *dwc, enum dwc3_link_state state) 958598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi{ 96aee63e3cb6b0396b99c6387a47cb90a7417f3957Paul Zimmerman int retries = 10000; 978598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi u32 reg; 988598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi 99802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman /* 100802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman * Wait until device controller is ready. Only applies to 1.94a and 101802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman * later RTL. 102802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman */ 103802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman if (dwc->revision >= DWC3_REVISION_194A) { 104802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman while (--retries) { 105802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman reg = dwc3_readl(dwc->regs, DWC3_DSTS); 106802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman if (reg & DWC3_DSTS_DCNRD) 107802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman udelay(5); 108802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman else 109802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman break; 110802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman } 111802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman 112802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman if (retries <= 0) 113802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman return -ETIMEDOUT; 114802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman } 115802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman 1168598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 1178598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi reg &= ~DWC3_DCTL_ULSTCHNGREQ_MASK; 1188598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi 1198598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi /* set requested state */ 1208598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi reg |= DWC3_DCTL_ULSTCHNGREQ(state); 1218598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 1228598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi 123802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman /* 124802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman * The following code is racy when called from dwc3_gadget_wakeup, 125802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman * and is not needed, at least on newer versions 126802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman */ 127802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman if (dwc->revision >= DWC3_REVISION_194A) 128802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman return 0; 129802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman 1308598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi /* wait for a change in DSTS */ 131aed430e5139af3e2c251f52db7fc6c5e2ce2b714Paul Zimmerman retries = 10000; 1328598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi while (--retries) { 1338598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 1348598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi 1358598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi if (DWC3_DSTS_USBLNKST(reg) == state) 1368598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi return 0; 1378598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi 138aee63e3cb6b0396b99c6387a47cb90a7417f3957Paul Zimmerman udelay(5); 1398598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi } 1408598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi 1418598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi dev_vdbg(dwc->dev, "link state change request timed out\n"); 1428598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi 1438598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi return -ETIMEDOUT; 1448598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi} 1458598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi 146457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi/** 147457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * dwc3_gadget_resize_tx_fifos - reallocate fifo spaces for current use-case 148457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * @dwc: pointer to our context structure 149457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * 150457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * This function will a best effort FIFO allocation in order 151457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * to improve FIFO usage and throughput, while still allowing 152457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * us to enable as many endpoints as possible. 153457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * 154457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * Keep in mind that this operation will be highly dependent 155457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * on the configured size for RAM1 - which contains TxFifo -, 156457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * the amount of endpoints enabled on coreConsultant tool, and 157457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * the width of the Master Bus. 158457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * 159457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * In the ideal world, we would always be able to satisfy the 160457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * following equation: 161457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * 162457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * ((512 + 2 * MDWIDTH-Bytes) + (Number of IN Endpoints - 1) * \ 163457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * (3 * (1024 + MDWIDTH-Bytes) + MDWIDTH-Bytes)) / MDWIDTH-Bytes 164457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * 165457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * Unfortunately, due to many variables that's not always the case. 166457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi */ 167457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbiint dwc3_gadget_resize_tx_fifos(struct dwc3 *dwc) 168457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi{ 169457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi int last_fifo_depth = 0; 170457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi int ram1_depth; 171457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi int fifo_size; 172457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi int mdwidth; 173457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi int num; 174457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 175457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi if (!dwc->needs_fifo_resize) 176457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi return 0; 177457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 178457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi ram1_depth = DWC3_RAM1_DEPTH(dwc->hwparams.hwparams7); 179457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi mdwidth = DWC3_MDWIDTH(dwc->hwparams.hwparams0); 180457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 181457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi /* MDWIDTH is represented in bits, we need it in bytes */ 182457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi mdwidth >>= 3; 183457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 184457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi /* 185457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * FIXME For now we will only allocate 1 wMaxPacketSize space 186457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * for each enabled endpoint, later patches will come to 187457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * improve this algorithm so that we better use the internal 188457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * FIFO space 189457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi */ 190457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi for (num = 0; num < DWC3_ENDPOINTS_NUM; num++) { 191457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi struct dwc3_ep *dep = dwc->eps[num]; 192457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi int fifo_number = dep->number >> 1; 1932e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi int mult = 1; 194457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi int tmp; 195457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 196457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi if (!(dep->number & 1)) 197457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi continue; 198457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 199457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) 200457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi continue; 201457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 20216e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if (usb_endpoint_xfer_bulk(dep->endpoint.desc) 20316e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz || usb_endpoint_xfer_isoc(dep->endpoint.desc)) 2042e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi mult = 3; 2052e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi 2062e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi /* 2072e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi * REVISIT: the following assumes we will always have enough 2082e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi * space available on the FIFO RAM for all possible use cases. 2092e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi * Make sure that's true somehow and change FIFO allocation 2102e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi * accordingly. 2112e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi * 2122e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi * If we have Bulk or Isochronous endpoints, we want 2132e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi * them to be able to be very, very fast. So we're giving 2142e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi * those endpoints a fifo_size which is enough for 3 full 2152e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi * packets 2162e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi */ 2172e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi tmp = mult * (dep->endpoint.maxpacket + mdwidth); 218457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi tmp += mdwidth; 219457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 220457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi fifo_size = DIV_ROUND_UP(tmp, mdwidth); 2212e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi 222457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi fifo_size |= (last_fifo_depth << 16); 223457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 224457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi dev_vdbg(dwc->dev, "%s: Fifo Addr %04x Size %d\n", 225457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi dep->name, last_fifo_depth, fifo_size & 0xffff); 226457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 227457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi dwc3_writel(dwc->regs, DWC3_GTXFIFOSIZ(fifo_number), 228457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi fifo_size); 229457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 230457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi last_fifo_depth += (fifo_size & 0xffff); 231457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi } 232457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 233457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi return 0; 234457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi} 235457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 23672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbivoid dwc3_gadget_giveback(struct dwc3_ep *dep, struct dwc3_request *req, 23772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int status) 23872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 23972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 240e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand int i; 24172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 24272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (req->queued) { 243e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand i = 0; 244e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand do { 245eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dep->busy_slot++; 246e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand /* 247e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * Skip LINK TRB. We can't use req->trb and check for 248e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * DWC3_TRBCTL_LINK_TRB because it points the TRB we 249e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * just completed (not the LINK TRB). 250e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand */ 251e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if (((dep->busy_slot & DWC3_TRB_MASK) == 252e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand DWC3_TRB_NUM- 1) && 25316e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz usb_endpoint_xfer_isoc(dep->endpoint.desc)) 254e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand dep->busy_slot++; 255e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand } while(++i < req->request.num_mapped_sgs); 256c9fda7d6f62a6520e01652d370654c5657d3c1a1Pratyush Anand req->queued = false; 25772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 25872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_del(&req->list); 259eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi req->trb = NULL; 26072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 26172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (req->request.status == -EINPROGRESS) 26272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.status = status; 26372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 2640416e494ce7dc84e2719bc9fb7daecb330476074Pratyush Anand if (dwc->ep0_bounced && dep->number == 0) 2650416e494ce7dc84e2719bc9fb7daecb330476074Pratyush Anand dwc->ep0_bounced = false; 2660416e494ce7dc84e2719bc9fb7daecb330476074Pratyush Anand else 2670416e494ce7dc84e2719bc9fb7daecb330476074Pratyush Anand usb_gadget_unmap_request(&dwc->gadget, &req->request, 2680416e494ce7dc84e2719bc9fb7daecb330476074Pratyush Anand req->direction); 26972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 27072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "request %p from %s completed %d/%d ===> %d\n", 27172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req, dep->name, req->request.actual, 27272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.length, status); 27372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 27472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock(&dwc->lock); 2750fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi req->request.complete(&dep->endpoint, &req->request); 27672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock(&dwc->lock); 27772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 27872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 27972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic const char *dwc3_gadget_ep_cmd_string(u8 cmd) 28072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 28172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (cmd) { 28272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_DEPSTARTCFG: 28372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Start New Configuration"; 28472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_ENDTRANSFER: 28572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "End Transfer"; 28672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_UPDATETRANSFER: 28772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Update Transfer"; 28872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_STARTTRANSFER: 28972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Start Transfer"; 29072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_CLEARSTALL: 29172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Clear Stall"; 29272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_SETSTALL: 29372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Set Stall"; 294802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman case DWC3_DEPCMD_GETEPSTATE: 295802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman return "Get Endpoint State"; 29672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_SETTRANSFRESOURCE: 29772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Set Endpoint Transfer Resource"; 29872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_SETEPCONFIG: 29972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Set Endpoint Configuration"; 30072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 30172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "UNKNOWN command"; 30272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 30372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 30472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 305427c3df684ab97379b529188d505cc99c2a1429dFelipe Balbistatic const char *dwc3_gadget_generic_cmd_string(u8 cmd) 306427c3df684ab97379b529188d505cc99c2a1429dFelipe Balbi{ 307427c3df684ab97379b529188d505cc99c2a1429dFelipe Balbi switch (cmd) { 308427c3df684ab97379b529188d505cc99c2a1429dFelipe Balbi case DWC3_DGCMD_SET_LMP: 309427c3df684ab97379b529188d505cc99c2a1429dFelipe Balbi return "Set LMP"; 310427c3df684ab97379b529188d505cc99c2a1429dFelipe Balbi case DWC3_DGCMD_SET_PERIODIC_PAR: 311427c3df684ab97379b529188d505cc99c2a1429dFelipe Balbi return "Set Periodic Parameters"; 312427c3df684ab97379b529188d505cc99c2a1429dFelipe Balbi case DWC3_DGCMD_XMIT_FUNCTION: 313427c3df684ab97379b529188d505cc99c2a1429dFelipe Balbi return "Transmit Function Wake Device Notification"; 314427c3df684ab97379b529188d505cc99c2a1429dFelipe Balbi case DWC3_DGCMD_SET_SCRATCHPAD_ADDR_LO: 315427c3df684ab97379b529188d505cc99c2a1429dFelipe Balbi return "Set Scratchpad Buffer Array Address Lo"; 316427c3df684ab97379b529188d505cc99c2a1429dFelipe Balbi case DWC3_DGCMD_SET_SCRATCHPAD_ADDR_HI: 317427c3df684ab97379b529188d505cc99c2a1429dFelipe Balbi return "Set Scratchpad Buffer Array Address Hi"; 318427c3df684ab97379b529188d505cc99c2a1429dFelipe Balbi case DWC3_DGCMD_SELECTED_FIFO_FLUSH: 319427c3df684ab97379b529188d505cc99c2a1429dFelipe Balbi return "Selected FIFO Flush"; 320427c3df684ab97379b529188d505cc99c2a1429dFelipe Balbi case DWC3_DGCMD_ALL_FIFO_FLUSH: 321427c3df684ab97379b529188d505cc99c2a1429dFelipe Balbi return "All FIFO Flush"; 322427c3df684ab97379b529188d505cc99c2a1429dFelipe Balbi case DWC3_DGCMD_SET_ENDPOINT_NRDY: 323427c3df684ab97379b529188d505cc99c2a1429dFelipe Balbi return "Set Endpoint NRDY"; 324427c3df684ab97379b529188d505cc99c2a1429dFelipe Balbi case DWC3_DGCMD_RUN_SOC_BUS_LOOPBACK: 325427c3df684ab97379b529188d505cc99c2a1429dFelipe Balbi return "Run SoC Bus Loopback Test"; 326427c3df684ab97379b529188d505cc99c2a1429dFelipe Balbi default: 327427c3df684ab97379b529188d505cc99c2a1429dFelipe Balbi return "UNKNOWN"; 328427c3df684ab97379b529188d505cc99c2a1429dFelipe Balbi } 329427c3df684ab97379b529188d505cc99c2a1429dFelipe Balbi} 330427c3df684ab97379b529188d505cc99c2a1429dFelipe Balbi 331e57ebc1db6ef796124b69abca044a373b9110a47Felipe Balbistatic const char *dwc3_gadget_link_string(enum dwc3_link_state link_state) 332e57ebc1db6ef796124b69abca044a373b9110a47Felipe Balbi{ 333e57ebc1db6ef796124b69abca044a373b9110a47Felipe Balbi switch (link_state) { 334e57ebc1db6ef796124b69abca044a373b9110a47Felipe Balbi case DWC3_LINK_STATE_U0: 335e57ebc1db6ef796124b69abca044a373b9110a47Felipe Balbi return "U0"; 336e57ebc1db6ef796124b69abca044a373b9110a47Felipe Balbi case DWC3_LINK_STATE_U1: 337e57ebc1db6ef796124b69abca044a373b9110a47Felipe Balbi return "U1"; 338e57ebc1db6ef796124b69abca044a373b9110a47Felipe Balbi case DWC3_LINK_STATE_U2: 339e57ebc1db6ef796124b69abca044a373b9110a47Felipe Balbi return "U2"; 340e57ebc1db6ef796124b69abca044a373b9110a47Felipe Balbi case DWC3_LINK_STATE_U3: 341e57ebc1db6ef796124b69abca044a373b9110a47Felipe Balbi return "U3"; 342e57ebc1db6ef796124b69abca044a373b9110a47Felipe Balbi case DWC3_LINK_STATE_SS_DIS: 343e57ebc1db6ef796124b69abca044a373b9110a47Felipe Balbi return "SS.Disabled"; 344e57ebc1db6ef796124b69abca044a373b9110a47Felipe Balbi case DWC3_LINK_STATE_RX_DET: 345e57ebc1db6ef796124b69abca044a373b9110a47Felipe Balbi return "RX.Detect"; 346e57ebc1db6ef796124b69abca044a373b9110a47Felipe Balbi case DWC3_LINK_STATE_SS_INACT: 347e57ebc1db6ef796124b69abca044a373b9110a47Felipe Balbi return "SS.Inactive"; 348e57ebc1db6ef796124b69abca044a373b9110a47Felipe Balbi case DWC3_LINK_STATE_POLL: 349e57ebc1db6ef796124b69abca044a373b9110a47Felipe Balbi return "Polling"; 350e57ebc1db6ef796124b69abca044a373b9110a47Felipe Balbi case DWC3_LINK_STATE_RECOV: 351e57ebc1db6ef796124b69abca044a373b9110a47Felipe Balbi return "Recovery"; 352e57ebc1db6ef796124b69abca044a373b9110a47Felipe Balbi case DWC3_LINK_STATE_HRESET: 353e57ebc1db6ef796124b69abca044a373b9110a47Felipe Balbi return "Hot Reset"; 354e57ebc1db6ef796124b69abca044a373b9110a47Felipe Balbi case DWC3_LINK_STATE_CMPLY: 355e57ebc1db6ef796124b69abca044a373b9110a47Felipe Balbi return "Compliance"; 356e57ebc1db6ef796124b69abca044a373b9110a47Felipe Balbi case DWC3_LINK_STATE_LPBK: 357e57ebc1db6ef796124b69abca044a373b9110a47Felipe Balbi return "Loopback"; 358e57ebc1db6ef796124b69abca044a373b9110a47Felipe Balbi case DWC3_LINK_STATE_RESET: 359e57ebc1db6ef796124b69abca044a373b9110a47Felipe Balbi return "Reset"; 360e57ebc1db6ef796124b69abca044a373b9110a47Felipe Balbi case DWC3_LINK_STATE_RESUME: 361e57ebc1db6ef796124b69abca044a373b9110a47Felipe Balbi return "Resume"; 362e57ebc1db6ef796124b69abca044a373b9110a47Felipe Balbi default: 363e57ebc1db6ef796124b69abca044a373b9110a47Felipe Balbi return "UNKNOWN link state\n"; 364e57ebc1db6ef796124b69abca044a373b9110a47Felipe Balbi } 365e57ebc1db6ef796124b69abca044a373b9110a47Felipe Balbi} 366e57ebc1db6ef796124b69abca044a373b9110a47Felipe Balbi 367b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbiint dwc3_send_gadget_generic_command(struct dwc3 *dwc, int cmd, u32 param) 368b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi{ 369b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi u32 timeout = 500; 370b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi u32 reg; 371b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi 372427c3df684ab97379b529188d505cc99c2a1429dFelipe Balbi dev_vdbg(dwc->dev, "generic cmd '%s' [%d] param %08x\n", 373427c3df684ab97379b529188d505cc99c2a1429dFelipe Balbi dwc3_gadget_generic_cmd_string(cmd), cmd, param); 374427c3df684ab97379b529188d505cc99c2a1429dFelipe Balbi 375b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi dwc3_writel(dwc->regs, DWC3_DGCMDPAR, param); 376b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi dwc3_writel(dwc->regs, DWC3_DGCMD, cmd | DWC3_DGCMD_CMDACT); 377b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi 378b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi do { 379b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DGCMD); 380b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi if (!(reg & DWC3_DGCMD_CMDACT)) { 381b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi dev_vdbg(dwc->dev, "Command Complete --> %d\n", 382b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi DWC3_DGCMD_STATUS(reg)); 383b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi return 0; 384b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi } 385b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi 386b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi /* 387b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi * We can't sleep here, because it's also called from 388b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi * interrupt context. 389b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi */ 390b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi timeout--; 391b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi if (!timeout) 392b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi return -ETIMEDOUT; 393b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi udelay(1); 394b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi } while (1); 395b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi} 396b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi 39772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiint dwc3_send_gadget_ep_cmd(struct dwc3 *dwc, unsigned ep, 39872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned cmd, struct dwc3_gadget_ep_cmd_params *params) 39972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 40072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = dwc->eps[ep]; 40161d58242f634642de42d6a4098913b7254a65053Sebastian Andrzej Siewior u32 timeout = 500; 40272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 40372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 40440cc57c71b27998c558d4ea23556cad2baef8a56Felipe Balbi dev_vdbg(dwc->dev, "%s: cmd '%s' [%d] params %08x %08x %08x\n", 40572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name, 40640cc57c71b27998c558d4ea23556cad2baef8a56Felipe Balbi dwc3_gadget_ep_cmd_string(cmd), cmd, params->param0, 407dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params->param1, params->param2); 40872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 409dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEPCMDPAR0(ep), params->param0); 410dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEPCMDPAR1(ep), params->param1); 411dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEPCMDPAR2(ep), params->param2); 41272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 41372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEPCMD(ep), cmd | DWC3_DEPCMD_CMDACT); 41472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi do { 41572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DEPCMD(ep)); 41672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(reg & DWC3_DEPCMD_CMDACT)) { 417164f6e141ed214bda30fb219d41ec3254bd90886Felipe Balbi dev_vdbg(dwc->dev, "Command Complete --> %d\n", 418164f6e141ed214bda30fb219d41ec3254bd90886Felipe Balbi DWC3_DEPCMD_STATUS(reg)); 41972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 42072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 42172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 42272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 42372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We can't sleep here, because it is also called from 42472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * interrupt context. 42572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 42672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi timeout--; 42772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!timeout) 42872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -ETIMEDOUT; 42972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 43061d58242f634642de42d6a4098913b7254a65053Sebastian Andrzej Siewior udelay(1); 43172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } while (1); 43272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 43372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 43472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic dma_addr_t dwc3_trb_dma_offset(struct dwc3_ep *dep, 435f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi struct dwc3_trb *trb) 43672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 437c439ef87c33a1df30f528cb152151465c2529cacPaul Zimmerman u32 offset = (char *) trb - (char *) dep->trb_pool; 43872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 43972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return dep->trb_pool_dma + offset; 44072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 44172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 44272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_alloc_trb_pool(struct dwc3_ep *dep) 44372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 44472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 44572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 44672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->trb_pool) 44772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 44872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 44972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->number == 0 || dep->number == 1) 45072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 45172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 45272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->trb_pool = dma_alloc_coherent(dwc->dev, 45372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi sizeof(struct dwc3_trb) * DWC3_TRB_NUM, 45472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi &dep->trb_pool_dma, GFP_KERNEL); 45572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dep->trb_pool) { 45672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dep->dwc->dev, "failed to allocate trb pool for %s\n", 45772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 45872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -ENOMEM; 45972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 46072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 46172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 46272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 46372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 46472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_free_trb_pool(struct dwc3_ep *dep) 46572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 46672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 46772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 46872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(struct dwc3_trb) * DWC3_TRB_NUM, 46972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->trb_pool, dep->trb_pool_dma); 47072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 47172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->trb_pool = NULL; 47272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->trb_pool_dma = 0; 47372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 47472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 47572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_start_config(struct dwc3 *dwc, struct dwc3_ep *dep) 47672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 47772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 47872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 cmd; 47972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 48072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0x00, sizeof(params)); 48172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 48272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->number != 1) { 48372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd = DWC3_DEPCMD_DEPSTARTCFG; 48472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* XferRscIdx == 0 for ep0 and 2 for the remaining */ 485b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman if (dep->number > 1) { 486b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman if (dwc->start_config_issued) 487b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman return 0; 488b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman dwc->start_config_issued = true; 48972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd |= DWC3_DEPCMD_PARAM(2); 490b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman } 49172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 49272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return dwc3_send_gadget_ep_cmd(dwc, 0, cmd, ¶ms); 49372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 49472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 49572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 49672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 49772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 49872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_set_ep_config(struct dwc3 *dwc, struct dwc3_ep *dep, 499c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi const struct usb_endpoint_descriptor *desc, 5004b345c9a3c7452340fb477868d8db475f05978b1Felipe Balbi const struct usb_ss_ep_comp_descriptor *comp_desc, 501265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman bool ignore, bool restore) 50272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 50372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 50472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 50572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0x00, sizeof(params)); 50672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 507dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param0 = DWC3_DEPCFG_EP_TYPE(usb_endpoint_type(desc)) 508d2e9a13a388304bc2a7b25a6c34c6e2ab1540a5dChanho Park | DWC3_DEPCFG_MAX_PACKET_SIZE(usb_endpoint_maxp(desc)); 509d2e9a13a388304bc2a7b25a6c34c6e2ab1540a5dChanho Park 510d2e9a13a388304bc2a7b25a6c34c6e2ab1540a5dChanho Park /* Burst size is only needed in SuperSpeed mode */ 511d2e9a13a388304bc2a7b25a6c34c6e2ab1540a5dChanho Park if (dwc->gadget.speed == USB_SPEED_SUPER) { 512d2e9a13a388304bc2a7b25a6c34c6e2ab1540a5dChanho Park u32 burst = dep->endpoint.maxburst - 1; 513d2e9a13a388304bc2a7b25a6c34c6e2ab1540a5dChanho Park 514d2e9a13a388304bc2a7b25a6c34c6e2ab1540a5dChanho Park params.param0 |= DWC3_DEPCFG_BURST_SIZE(burst); 515d2e9a13a388304bc2a7b25a6c34c6e2ab1540a5dChanho Park } 51672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 5174b345c9a3c7452340fb477868d8db475f05978b1Felipe Balbi if (ignore) 5184b345c9a3c7452340fb477868d8db475f05978b1Felipe Balbi params.param0 |= DWC3_DEPCFG_IGN_SEQ_NUM; 5194b345c9a3c7452340fb477868d8db475f05978b1Felipe Balbi 520265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman if (restore) { 521265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman params.param0 |= DWC3_DEPCFG_ACTION_RESTORE; 522265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman params.param2 |= dep->saved_state; 523265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman } 524265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman 525dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param1 = DWC3_DEPCFG_XFER_COMPLETE_EN 526dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi | DWC3_DEPCFG_XFER_NOT_READY_EN; 52772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 52818b7ede5f7ee2092aedcb578d3ac30bd5d4fc23cFelipe Balbi if (usb_ss_max_streams(comp_desc) && usb_endpoint_xfer_bulk(desc)) { 529dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param1 |= DWC3_DEPCFG_STREAM_CAPABLE 530dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi | DWC3_DEPCFG_STREAM_EVENT_EN; 531879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dep->stream_capable = true; 532879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi } 533879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi 53472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (usb_endpoint_xfer_isoc(desc)) 535dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param1 |= DWC3_DEPCFG_XFER_IN_PROGRESS_EN; 53672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 53772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 53872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We are doing 1:1 mapping for endpoints, meaning 53972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Physical Endpoints 2 maps to Logical Endpoint 2 and 54072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * so on. We consider the direction bit as part of the physical 54172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * endpoint number. So USB endpoint 0x81 is 0x03. 54272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 543dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param1 |= DWC3_DEPCFG_EP_NUMBER(dep->number); 54472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 54572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 54672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We must use the lower 16 TX FIFOs even though 54772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * HW might have more 54872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 54972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->direction) 550dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param0 |= DWC3_DEPCFG_FIFO_NUMBER(dep->number >> 1); 55172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 55272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (desc->bInterval) { 553dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param1 |= DWC3_DEPCFG_BINTERVAL_M1(desc->bInterval - 1); 55472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->interval = 1 << (desc->bInterval - 1); 55572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 55672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 55772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return dwc3_send_gadget_ep_cmd(dwc, dep->number, 55872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEPCMD_SETEPCONFIG, ¶ms); 55972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 56072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 56172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_set_xfer_resource(struct dwc3 *dwc, struct dwc3_ep *dep) 56272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 56372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 56472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 56572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0x00, sizeof(params)); 56672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 567dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param0 = DWC3_DEPXFERCFG_NUM_XFER_RES(1); 56872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 56972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return dwc3_send_gadget_ep_cmd(dwc, dep->number, 57072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEPCMD_SETTRANSFRESOURCE, ¶ms); 57172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 57272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 57372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/** 57472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * __dwc3_gadget_ep_enable - Initializes a HW endpoint 57572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * @dep: endpoint to be initialized 57672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * @desc: USB Endpoint Descriptor 57772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 57872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Caller should take care of locking 57972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 58072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int __dwc3_gadget_ep_enable(struct dwc3_ep *dep, 581c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi const struct usb_endpoint_descriptor *desc, 5824b345c9a3c7452340fb477868d8db475f05978b1Felipe Balbi const struct usb_ss_ep_comp_descriptor *comp_desc, 583265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman bool ignore, bool restore) 58472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 58572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 58672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 587b09e99ee7c2b7ee80cca128b93b07fb830e6ecadAndy Shevchenko int ret; 58872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 589ff62d6b6727360ae73382213bc1ebac6cf5160d7Felipe Balbi dev_vdbg(dwc->dev, "Enabling %s\n", dep->name); 590ff62d6b6727360ae73382213bc1ebac6cf5160d7Felipe Balbi 59172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) { 59272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_gadget_start_config(dwc, dep); 59372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 59472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 59572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 59672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 597265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman ret = dwc3_gadget_set_ep_config(dwc, dep, desc, comp_desc, ignore, 598265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman restore); 59972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 60072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 60172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 60272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) { 603f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi struct dwc3_trb *trb_st_hw; 604f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi struct dwc3_trb *trb_link; 60572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 60672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_gadget_set_xfer_resource(dwc, dep); 60772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 60872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 60972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 61016e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz dep->endpoint.desc = desc; 611c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi dep->comp_desc = comp_desc; 61272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->type = usb_endpoint_type(desc); 61372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags |= DWC3_EP_ENABLED; 61472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 61572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DALEPENA); 61672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg |= DWC3_DALEPENA_EP(dep->number); 61772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DALEPENA, reg); 61872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 61972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!usb_endpoint_xfer_isoc(desc)) 62072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 62172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 62272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(&trb_link, 0, sizeof(trb_link)); 62372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 6241d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman /* Link TRB for ISOC. The HWO bit is never reset */ 62572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trb_st_hw = &dep->trb_pool[0]; 62672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 627f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb_link = &dep->trb_pool[DWC3_TRB_NUM - 1]; 62872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 629f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb_link->bpl = lower_32_bits(dwc3_trb_dma_offset(dep, trb_st_hw)); 630f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb_link->bph = upper_32_bits(dwc3_trb_dma_offset(dep, trb_st_hw)); 631f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb_link->ctrl |= DWC3_TRBCTL_LINK_TRB; 632f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb_link->ctrl |= DWC3_TRB_CTRL_HWO; 63372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 63472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 63572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 63672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 63772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 638b992e6813e257269e9599ca07be8bd52df784bf5Paul Zimmermanstatic void dwc3_stop_active_transfer(struct dwc3 *dwc, u32 epnum, bool force); 639624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewiorstatic void dwc3_remove_requests(struct dwc3 *dwc, struct dwc3_ep *dep) 64072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 64172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req; 64272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 643ea53b8828c50b7a5138a8931c41b2671682c86b5Felipe Balbi if (!list_empty(&dep->req_queued)) { 644b992e6813e257269e9599ca07be8bd52df784bf5Paul Zimmerman dwc3_stop_active_transfer(dwc, dep->number, true); 645624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior 64657911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand /* - giveback all requests to gadget driver */ 6471591633ed6c4c3994944f31ddb59bc072a2ed0caPratyush Anand while (!list_empty(&dep->req_queued)) { 6481591633ed6c4c3994944f31ddb59bc072a2ed0caPratyush Anand req = next_request(&dep->req_queued); 6491591633ed6c4c3994944f31ddb59bc072a2ed0caPratyush Anand 6501591633ed6c4c3994944f31ddb59bc072a2ed0caPratyush Anand dwc3_gadget_giveback(dep, req, -ESHUTDOWN); 6511591633ed6c4c3994944f31ddb59bc072a2ed0caPratyush Anand } 652ea53b8828c50b7a5138a8931c41b2671682c86b5Felipe Balbi } 653ea53b8828c50b7a5138a8931c41b2671682c86b5Felipe Balbi 65472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi while (!list_empty(&dep->request_list)) { 65572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req = next_request(&dep->request_list); 65672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 657624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior dwc3_gadget_giveback(dep, req, -ESHUTDOWN); 65872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 65972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 66072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 66172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/** 66272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * __dwc3_gadget_ep_disable - Disables a HW endpoint 66372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * @dep: the endpoint to disable 66472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 665624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior * This function also removes requests which are currently processed ny the 666624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior * hardware and those which are not yet scheduled. 667624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior * Caller should take care of locking. 66872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 66972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int __dwc3_gadget_ep_disable(struct dwc3_ep *dep) 67072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 67172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 67272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 67372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 674624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior dwc3_remove_requests(dwc, dep); 67572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 676687ef9817df7ed960d14575b9033dde3d04631feFelipe Balbi /* make sure HW endpoint isn't stalled */ 677687ef9817df7ed960d14575b9033dde3d04631feFelipe Balbi if (dep->flags & DWC3_EP_STALL) 678687ef9817df7ed960d14575b9033dde3d04631feFelipe Balbi __dwc3_gadget_ep_set_halt(dep, 0); 679687ef9817df7ed960d14575b9033dde3d04631feFelipe Balbi 68072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DALEPENA); 68172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DALEPENA_EP(dep->number); 68272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DALEPENA, reg); 68372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 684879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dep->stream_capable = false; 685f9c56cdd3905c96c600456203637bd7ec8ec6383Ido Shayevitz dep->endpoint.desc = NULL; 686c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi dep->comp_desc = NULL; 68772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->type = 0; 688879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dep->flags = 0; 68972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 69072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 69172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 69272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 69372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 69472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 69572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep0_enable(struct usb_ep *ep, 69672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct usb_endpoint_descriptor *desc) 69772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 69872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EINVAL; 69972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 70072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 70172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep0_disable(struct usb_ep *ep) 70272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 70372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EINVAL; 70472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 70572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 70672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 70772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 70872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_enable(struct usb_ep *ep, 70972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct usb_endpoint_descriptor *desc) 71072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 71172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 71272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc; 71372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 71472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 71572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 71672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!ep || !desc || desc->bDescriptorType != USB_DT_ENDPOINT) { 71772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi pr_debug("dwc3: invalid parameters\n"); 71872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EINVAL; 71972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 72072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 72172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!desc->wMaxPacketSize) { 72272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi pr_debug("dwc3: missing wMaxPacketSize\n"); 72372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EINVAL; 72472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 72572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 72672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = to_dwc3_ep(ep); 72772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc = dep->dwc; 72872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 729c6f83f386c2f7987a344368e33e55840c12bd38fFelipe Balbi if (dep->flags & DWC3_EP_ENABLED) { 730c6f83f386c2f7987a344368e33e55840c12bd38fFelipe Balbi dev_WARN_ONCE(dwc->dev, true, "%s is already enabled\n", 731c6f83f386c2f7987a344368e33e55840c12bd38fFelipe Balbi dep->name); 732c6f83f386c2f7987a344368e33e55840c12bd38fFelipe Balbi return 0; 733c6f83f386c2f7987a344368e33e55840c12bd38fFelipe Balbi } 734c6f83f386c2f7987a344368e33e55840c12bd38fFelipe Balbi 73572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (usb_endpoint_type(desc)) { 73672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_ENDPOINT_XFER_CONTROL: 73727a78d6a283d6782438f72306746afe4bf44c215Anton Tikhomirov strlcat(dep->name, "-control", sizeof(dep->name)); 73872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 73972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_ENDPOINT_XFER_ISOC: 74027a78d6a283d6782438f72306746afe4bf44c215Anton Tikhomirov strlcat(dep->name, "-isoc", sizeof(dep->name)); 74172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 74272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_ENDPOINT_XFER_BULK: 74327a78d6a283d6782438f72306746afe4bf44c215Anton Tikhomirov strlcat(dep->name, "-bulk", sizeof(dep->name)); 74472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 74572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_ENDPOINT_XFER_INT: 74627a78d6a283d6782438f72306746afe4bf44c215Anton Tikhomirov strlcat(dep->name, "-int", sizeof(dep->name)); 74772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 74872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 74972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "invalid endpoint transfer type\n"); 75072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 75172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 75272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 753265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman ret = __dwc3_gadget_ep_enable(dep, desc, ep->comp_desc, false, false); 75472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 75572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 75672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 75772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 75872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 75972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_disable(struct usb_ep *ep) 76072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 76172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 76272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc; 76372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 76472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 76572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 76672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!ep) { 76772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi pr_debug("dwc3: invalid parameters\n"); 76872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EINVAL; 76972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 77072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 77172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = to_dwc3_ep(ep); 77272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc = dep->dwc; 77372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 77472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) { 77572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_WARN_ONCE(dwc->dev, true, "%s is already disabled\n", 77672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 77772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 77872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 77972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 78072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi snprintf(dep->name, sizeof(dep->name), "ep%d%s", 78172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->number >> 1, 78272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi (dep->number & 1) ? "in" : "out"); 78372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 78472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 78572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = __dwc3_gadget_ep_disable(dep); 78672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 78772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 78872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 78972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 79072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 79172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic struct usb_request *dwc3_gadget_ep_alloc_request(struct usb_ep *ep, 79272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi gfp_t gfp_flags) 79372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 79472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req; 79572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = to_dwc3_ep(ep); 79672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 79772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 79872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req = kzalloc(sizeof(*req), gfp_flags); 79972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!req) { 80072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "not enough memory\n"); 80172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return NULL; 80272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 80372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 80472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->epnum = dep->number; 80572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->dep = dep; 80672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 80772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return &req->request; 80872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 80972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 81072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_ep_free_request(struct usb_ep *ep, 81172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct usb_request *request) 81272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 81372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req = to_dwc3_request(request); 81472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 81572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi kfree(req); 81672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 81772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 818c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi/** 819c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi * dwc3_prepare_one_trb - setup one TRB from one request 820c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi * @dep: endpoint for which this request is prepared 821c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi * @req: dwc3_request pointer 822c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi */ 82368e823e24aea5227eaf20d6435485e733109d113Felipe Balbistatic void dwc3_prepare_one_trb(struct dwc3_ep *dep, 824eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi struct dwc3_request *req, dma_addr_t dma, 825e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand unsigned length, unsigned last, unsigned chain, unsigned node) 826c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi{ 827eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi struct dwc3 *dwc = dep->dwc; 828f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi struct dwc3_trb *trb; 829c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 830eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dev_vdbg(dwc->dev, "%s: req %p dma %08llx length %d%s%s\n", 831eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dep->name, req, (unsigned long long) dma, 832eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi length, last ? " last" : "", 833eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi chain ? " chain" : ""); 834eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi 835c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi /* Skip the LINK-TRB on ISOC */ 836915e202aeeb59e272992a6364c910aaef3073544Pratyush Anand if (((dep->free_slot & DWC3_TRB_MASK) == DWC3_TRB_NUM - 1) && 83716e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz usb_endpoint_xfer_isoc(dep->endpoint.desc)) 838915e202aeeb59e272992a6364c910aaef3073544Pratyush Anand dep->free_slot++; 839915e202aeeb59e272992a6364c910aaef3073544Pratyush Anand 840915e202aeeb59e272992a6364c910aaef3073544Pratyush Anand trb = &dep->trb_pool[dep->free_slot & DWC3_TRB_MASK]; 841c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 842eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (!req->trb) { 843eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dwc3_gadget_move_request_queued(req); 844f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi req->trb = trb; 845f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi req->trb_dma = dwc3_trb_dma_offset(dep, trb); 846e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand req->start_slot = dep->free_slot & DWC3_TRB_MASK; 847eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi } 848c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 849e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand dep->free_slot++; 850e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand 851f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->size = DWC3_TRB_SIZE_LENGTH(length); 852f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->bpl = lower_32_bits(dma); 853f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->bph = upper_32_bits(dma); 854c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 85516e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz switch (usb_endpoint_type(dep->endpoint.desc)) { 856c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi case USB_ENDPOINT_XFER_CONTROL: 857f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->ctrl = DWC3_TRBCTL_CONTROL_SETUP; 858c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi break; 859c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 860c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi case USB_ENDPOINT_XFER_ISOC: 861e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if (!node) 862e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand trb->ctrl = DWC3_TRBCTL_ISOCHRONOUS_FIRST; 863e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand else 864e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand trb->ctrl = DWC3_TRBCTL_ISOCHRONOUS; 865c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi break; 866c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 867c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi case USB_ENDPOINT_XFER_BULK: 868c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi case USB_ENDPOINT_XFER_INT: 869f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->ctrl = DWC3_TRBCTL_NORMAL; 870c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi break; 871c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi default: 872c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi /* 873c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi * This is only possible with faulty memory because we 874c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi * checked it already :) 875c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi */ 876c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi BUG(); 877c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi } 878c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 879f3af36511e60669a2b5644d17378c7ea4e42d8b1Felipe Balbi if (!req->request.no_interrupt && !chain) 880f3af36511e60669a2b5644d17378c7ea4e42d8b1Felipe Balbi trb->ctrl |= DWC3_TRB_CTRL_IOC; 881f3af36511e60669a2b5644d17378c7ea4e42d8b1Felipe Balbi 88216e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if (usb_endpoint_xfer_isoc(dep->endpoint.desc)) { 883f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->ctrl |= DWC3_TRB_CTRL_ISP_IMI; 884f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->ctrl |= DWC3_TRB_CTRL_CSP; 885e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand } else if (last) { 886e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand trb->ctrl |= DWC3_TRB_CTRL_LST; 887f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi } 888c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 889e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if (chain) 890e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand trb->ctrl |= DWC3_TRB_CTRL_CHN; 891e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand 89216e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if (usb_endpoint_xfer_bulk(dep->endpoint.desc) && dep->stream_capable) 893f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->ctrl |= DWC3_TRB_CTRL_SID_SOFN(req->request.stream_id); 894c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 895f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->ctrl |= DWC3_TRB_CTRL_HWO; 896c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi} 897c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 89872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* 89972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * dwc3_prepare_trbs - setup TRBs from requests 90072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * @dep: endpoint for which requests are being prepared 90172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * @starting: true if the endpoint is idle and no requests are queued. 90272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 9031d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * The function goes through the requests list and sets up TRBs for the 9041d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * transfers. The function returns once there are no more TRBs available or 9051d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * it runs out of requests. 90672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 90768e823e24aea5227eaf20d6435485e733109d113Felipe Balbistatic void dwc3_prepare_trbs(struct dwc3_ep *dep, bool starting) 90872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 90968e823e24aea5227eaf20d6435485e733109d113Felipe Balbi struct dwc3_request *req, *n; 91072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 trbs_left; 9118d62cd65d74d0e241b3a152f7347bb66126b705bPaul Zimmerman u32 max; 912c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi unsigned int last_one = 0; 91372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 91472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi BUILD_BUG_ON_NOT_POWER_OF_2(DWC3_TRB_NUM); 91572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 91672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* the first request must not be queued */ 91772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trbs_left = (dep->busy_slot - dep->free_slot) & DWC3_TRB_MASK; 918c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 9198d62cd65d74d0e241b3a152f7347bb66126b705bPaul Zimmerman /* Can't wrap around on a non-isoc EP since there's no link TRB */ 92016e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if (!usb_endpoint_xfer_isoc(dep->endpoint.desc)) { 9218d62cd65d74d0e241b3a152f7347bb66126b705bPaul Zimmerman max = DWC3_TRB_NUM - (dep->free_slot & DWC3_TRB_MASK); 9228d62cd65d74d0e241b3a152f7347bb66126b705bPaul Zimmerman if (trbs_left > max) 9238d62cd65d74d0e241b3a152f7347bb66126b705bPaul Zimmerman trbs_left = max; 9248d62cd65d74d0e241b3a152f7347bb66126b705bPaul Zimmerman } 9258d62cd65d74d0e241b3a152f7347bb66126b705bPaul Zimmerman 92672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 9271d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * If busy & slot are equal than it is either full or empty. If we are 9281d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * starting to process requests then we are empty. Otherwise we are 92972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * full and don't do anything 93072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 93172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!trbs_left) { 93272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!starting) 93368e823e24aea5227eaf20d6435485e733109d113Felipe Balbi return; 93472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trbs_left = DWC3_TRB_NUM; 93572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 93672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * In case we start from scratch, we queue the ISOC requests 93772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * starting from slot 1. This is done because we use ring 93872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * buffer and have no LST bit to stop us. Instead, we place 9391d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * IOC bit every TRB_NUM/4. We try to avoid having an interrupt 94072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * after the first request so we start at slot 1 and have 94172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 7 requests proceed before we hit the first IOC. 94272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Other transfer types don't use the ring buffer and are 94372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * processed from the first TRB until the last one. Since we 94472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * don't wrap around we have to start at the beginning. 94572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 94616e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if (usb_endpoint_xfer_isoc(dep->endpoint.desc)) { 94772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->busy_slot = 1; 94872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->free_slot = 1; 94972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 95072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->busy_slot = 0; 95172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->free_slot = 0; 95272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 95372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 95472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 95572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* The last TRB is a link TRB, not used for xfer */ 95616e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if ((trbs_left <= 1) && usb_endpoint_xfer_isoc(dep->endpoint.desc)) 95768e823e24aea5227eaf20d6435485e733109d113Felipe Balbi return; 95872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 95972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_for_each_entry_safe(req, n, &dep->request_list, list) { 960eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi unsigned length; 961eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dma_addr_t dma; 962e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand last_one = false; 96372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 964eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (req->request.num_mapped_sgs > 0) { 965eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi struct usb_request *request = &req->request; 966eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi struct scatterlist *sg = request->sg; 967eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi struct scatterlist *s; 968eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi int i; 96972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 970eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi for_each_sg(sg, s, request->num_mapped_sgs, i) { 971eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi unsigned chain = true; 97272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 973eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi length = sg_dma_len(s); 974eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dma = sg_dma_address(s); 97572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 9761d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman if (i == (request->num_mapped_sgs - 1) || 9771d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman sg_is_last(s)) { 978e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if (list_is_last(&req->list, 979e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand &dep->request_list)) 980e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand last_one = true; 981eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi chain = false; 982eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi } 98372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 984eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi trbs_left--; 985eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (!trbs_left) 986eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi last_one = true; 98772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 988eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (last_one) 989eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi chain = false; 99072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 991eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dwc3_prepare_one_trb(dep, req, dma, length, 992e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand last_one, chain, i); 99372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 994eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (last_one) 995eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi break; 996eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi } 99772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 998eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dma = req->request.dma; 999eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi length = req->request.length; 1000eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi trbs_left--; 100172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1002eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (!trbs_left) 1003eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi last_one = 1; 1004879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi 1005eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi /* Is this the last request? */ 1006eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (list_is_last(&req->list, &dep->request_list)) 1007eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi last_one = 1; 100872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1009eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dwc3_prepare_one_trb(dep, req, dma, length, 1010e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand last_one, false, 0); 101172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1012eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (last_one) 1013eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi break; 101472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 101572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 101672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 101772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 101872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int __dwc3_gadget_kick_transfer(struct dwc3_ep *dep, u16 cmd_param, 101972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int start_new) 102072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 102172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 102272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req; 102372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 102472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 102572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 cmd; 102672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 102772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (start_new && (dep->flags & DWC3_EP_BUSY)) { 102872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s: endpoint busy\n", dep->name); 102972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EBUSY; 103072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 103172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags &= ~DWC3_EP_PENDING_REQUEST; 103272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 103372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 103472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * If we are getting here after a short-out-packet we don't enqueue any 103572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * new requests as we try to set the IOC bit only on the last request. 103672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 103772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (start_new) { 103872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (list_empty(&dep->req_queued)) 103972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_prepare_trbs(dep, start_new); 104072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 104172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* req points to the first request which will be sent */ 104272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req = next_request(&dep->req_queued); 104372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 104468e823e24aea5227eaf20d6435485e733109d113Felipe Balbi dwc3_prepare_trbs(dep, start_new); 104568e823e24aea5227eaf20d6435485e733109d113Felipe Balbi 104672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 10471d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * req points to the first request where HWO changed from 0 to 1 104872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 104968e823e24aea5227eaf20d6435485e733109d113Felipe Balbi req = next_request(&dep->req_queued); 105072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 105172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!req) { 105272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags |= DWC3_EP_PENDING_REQUEST; 105372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 105472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 105572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 105672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0, sizeof(params)); 105772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 10581877d6c9a57802d50a059cf2dacdba10168cece7Pratyush Anand if (start_new) { 10591877d6c9a57802d50a059cf2dacdba10168cece7Pratyush Anand params.param0 = upper_32_bits(req->trb_dma); 10601877d6c9a57802d50a059cf2dacdba10168cece7Pratyush Anand params.param1 = lower_32_bits(req->trb_dma); 106172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd = DWC3_DEPCMD_STARTTRANSFER; 10621877d6c9a57802d50a059cf2dacdba10168cece7Pratyush Anand } else { 106372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd = DWC3_DEPCMD_UPDATETRANSFER; 10641877d6c9a57802d50a059cf2dacdba10168cece7Pratyush Anand } 106572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 106672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd |= DWC3_DEPCMD_PARAM(cmd_param); 106772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, cmd, ¶ms); 106872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret < 0) { 106972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "failed to send STARTTRANSFER command\n"); 107072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 107172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 107272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * FIXME we need to iterate over the list of requests 107372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * here and stop, unmap, free and del each of the linked 10741d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * requests instead of what we do now. 107572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 10760fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi usb_gadget_unmap_request(&dwc->gadget, &req->request, 10770fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi req->direction); 107872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_del(&req->list); 107972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 108072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 108172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 108272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags |= DWC3_EP_BUSY; 108325b8ff68bf1d4954d4a9dcb4862c6b6a53cb09e2Felipe Balbi 1084f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman if (start_new) { 1085b4996a8631e80a2aaddb5c487ff6b9ad37315f70Felipe Balbi dep->resource_index = dwc3_gadget_ep_get_transfer_index(dwc, 1086f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman dep->number); 1087b4996a8631e80a2aaddb5c487ff6b9ad37315f70Felipe Balbi WARN_ON_ONCE(!dep->resource_index); 1088f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman } 108925b8ff68bf1d4954d4a9dcb4862c6b6a53cb09e2Felipe Balbi 109072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 109172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 109272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1093d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anandstatic void __dwc3_gadget_start_isoc(struct dwc3 *dwc, 1094d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand struct dwc3_ep *dep, u32 cur_uf) 1095d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand{ 1096d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand u32 uf; 1097d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand 1098d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand if (list_empty(&dep->request_list)) { 1099d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand dev_vdbg(dwc->dev, "ISOC ep %s run out for requests.\n", 1100d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand dep->name); 1101f4a53c55117b82e895ec98b1765c9d66940377fcPratyush Anand dep->flags |= DWC3_EP_PENDING_REQUEST; 1102d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand return; 1103d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand } 1104d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand 1105d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand /* 4 micro frames in the future */ 1106d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand uf = cur_uf + dep->interval * 4; 1107d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand 1108d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand __dwc3_gadget_kick_transfer(dep, uf, 1); 1109d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand} 1110d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand 1111d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anandstatic void dwc3_gadget_start_isoc(struct dwc3 *dwc, 1112d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand struct dwc3_ep *dep, const struct dwc3_event_depevt *event) 1113d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand{ 1114d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand u32 cur_uf, mask; 1115d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand 1116d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand mask = ~(dep->interval - 1); 1117d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand cur_uf = event->parameters & mask; 1118d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand 1119d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand __dwc3_gadget_start_isoc(dwc, dep, cur_uf); 1120d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand} 1121d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand 112272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int __dwc3_gadget_ep_queue(struct dwc3_ep *dep, struct dwc3_request *req) 112372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 11240fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi struct dwc3 *dwc = dep->dwc; 11250fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi int ret; 11260fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi 112772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.actual = 0; 112872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.status = -EINPROGRESS; 112972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->direction = dep->direction; 113072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->epnum = dep->number; 113172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 113272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 113372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We only add to our list of requests now and 113472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * start consuming the list once we get XferNotReady 113572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * IRQ. 113672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 113772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * That way, we avoid doing anything that we don't need 113872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * to do now and defer it until the point we receive a 113972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * particular token from the Host side. 114072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 114172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * This will also avoid Host cancelling URBs due to too 11421d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * many NAKs. 114372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 11440fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi ret = usb_gadget_map_request(&dwc->gadget, &req->request, 11450fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi dep->direction); 11460fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi if (ret) 11470fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi return ret; 11480fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi 114972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_add_tail(&req->list, &dep->request_list); 115072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 115172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 1152b511e5e76bf488cd3eec1048483a3898393a4dcaFelipe Balbi * There are a few special cases: 115372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 1154f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman * 1. XferNotReady with empty list of requests. We need to kick the 1155f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman * transfer here in that situation, otherwise we will be NAKing 1156f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman * forever. If we get XferNotReady before gadget driver has a 1157f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman * chance to queue a request, we will ACK the IRQ but won't be 1158f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman * able to receive the data until the next request is queued. 1159f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman * The following code is handling exactly that. 116072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 116172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 116272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->flags & DWC3_EP_PENDING_REQUEST) { 1163f4a53c55117b82e895ec98b1765c9d66940377fcPratyush Anand /* 1164f4a53c55117b82e895ec98b1765c9d66940377fcPratyush Anand * If xfernotready is already elapsed and it is a case 1165f4a53c55117b82e895ec98b1765c9d66940377fcPratyush Anand * of isoc transfer, then issue END TRANSFER, so that 1166f4a53c55117b82e895ec98b1765c9d66940377fcPratyush Anand * you can receive xfernotready again and can have 1167f4a53c55117b82e895ec98b1765c9d66940377fcPratyush Anand * notion of current microframe. 1168f4a53c55117b82e895ec98b1765c9d66940377fcPratyush Anand */ 1169f4a53c55117b82e895ec98b1765c9d66940377fcPratyush Anand if (usb_endpoint_xfer_isoc(dep->endpoint.desc)) { 1170cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand if (list_empty(&dep->req_queued)) { 1171b992e6813e257269e9599ca07be8bd52df784bf5Paul Zimmerman dwc3_stop_active_transfer(dwc, dep->number, true); 1172cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand dep->flags = DWC3_EP_ENABLED; 1173cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand } 1174f4a53c55117b82e895ec98b1765c9d66940377fcPratyush Anand return 0; 1175f4a53c55117b82e895ec98b1765c9d66940377fcPratyush Anand } 1176f4a53c55117b82e895ec98b1765c9d66940377fcPratyush Anand 1177b511e5e76bf488cd3eec1048483a3898393a4dcaFelipe Balbi ret = __dwc3_gadget_kick_transfer(dep, 0, true); 1178348e026fafe2501281db5fb7fed599b337cad358Moiz Sonasath if (ret && ret != -EBUSY) 1179b511e5e76bf488cd3eec1048483a3898393a4dcaFelipe Balbi dev_dbg(dwc->dev, "%s: failed to kick transfers\n", 1180b511e5e76bf488cd3eec1048483a3898393a4dcaFelipe Balbi dep->name); 118115f86bde29f0fdfb877d9c753547fa2e2f5ef1fePratyush Anand return ret; 1182b511e5e76bf488cd3eec1048483a3898393a4dcaFelipe Balbi } 118372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1184b511e5e76bf488cd3eec1048483a3898393a4dcaFelipe Balbi /* 1185b511e5e76bf488cd3eec1048483a3898393a4dcaFelipe Balbi * 2. XferInProgress on Isoc EP with an active transfer. We need to 1186b511e5e76bf488cd3eec1048483a3898393a4dcaFelipe Balbi * kick the transfer here after queuing a request, otherwise the 1187b511e5e76bf488cd3eec1048483a3898393a4dcaFelipe Balbi * core may not see the modified TRB(s). 1188b511e5e76bf488cd3eec1048483a3898393a4dcaFelipe Balbi */ 1189b511e5e76bf488cd3eec1048483a3898393a4dcaFelipe Balbi if (usb_endpoint_xfer_isoc(dep->endpoint.desc) && 119079c9046ec52b5aaa9f055e3d928d676dd37a6f9dPratyush Anand (dep->flags & DWC3_EP_BUSY) && 119179c9046ec52b5aaa9f055e3d928d676dd37a6f9dPratyush Anand !(dep->flags & DWC3_EP_MISSED_ISOC)) { 1192b4996a8631e80a2aaddb5c487ff6b9ad37315f70Felipe Balbi WARN_ON_ONCE(!dep->resource_index); 1193b4996a8631e80a2aaddb5c487ff6b9ad37315f70Felipe Balbi ret = __dwc3_gadget_kick_transfer(dep, dep->resource_index, 1194b511e5e76bf488cd3eec1048483a3898393a4dcaFelipe Balbi false); 1195348e026fafe2501281db5fb7fed599b337cad358Moiz Sonasath if (ret && ret != -EBUSY) 119672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "%s: failed to kick transfers\n", 119772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 119815f86bde29f0fdfb877d9c753547fa2e2f5ef1fePratyush Anand return ret; 1199a092532483e3200a53c8b1170b3988cc668c07efFelipe Balbi } 120072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1201b997ada5db905e24494bcc689c7b2c07d278ca27Felipe Balbi /* 1202b997ada5db905e24494bcc689c7b2c07d278ca27Felipe Balbi * 4. Stream Capable Bulk Endpoints. We need to start the transfer 1203b997ada5db905e24494bcc689c7b2c07d278ca27Felipe Balbi * right away, otherwise host will not know we have streams to be 1204b997ada5db905e24494bcc689c7b2c07d278ca27Felipe Balbi * handled. 1205b997ada5db905e24494bcc689c7b2c07d278ca27Felipe Balbi */ 1206b997ada5db905e24494bcc689c7b2c07d278ca27Felipe Balbi if (dep->stream_capable) { 1207b997ada5db905e24494bcc689c7b2c07d278ca27Felipe Balbi int ret; 1208b997ada5db905e24494bcc689c7b2c07d278ca27Felipe Balbi 1209b997ada5db905e24494bcc689c7b2c07d278ca27Felipe Balbi ret = __dwc3_gadget_kick_transfer(dep, 0, true); 1210b997ada5db905e24494bcc689c7b2c07d278ca27Felipe Balbi if (ret && ret != -EBUSY) { 1211b997ada5db905e24494bcc689c7b2c07d278ca27Felipe Balbi struct dwc3 *dwc = dep->dwc; 1212b997ada5db905e24494bcc689c7b2c07d278ca27Felipe Balbi 1213b997ada5db905e24494bcc689c7b2c07d278ca27Felipe Balbi dev_dbg(dwc->dev, "%s: failed to kick transfers\n", 1214b997ada5db905e24494bcc689c7b2c07d278ca27Felipe Balbi dep->name); 1215b997ada5db905e24494bcc689c7b2c07d278ca27Felipe Balbi } 1216b997ada5db905e24494bcc689c7b2c07d278ca27Felipe Balbi } 1217b997ada5db905e24494bcc689c7b2c07d278ca27Felipe Balbi 121872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 121972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 122072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 122172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_queue(struct usb_ep *ep, struct usb_request *request, 122272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi gfp_t gfp_flags) 122372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 122472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req = to_dwc3_request(request); 122572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = to_dwc3_ep(ep); 122672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 122772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 122872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 122972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 123072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 123172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 123216e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if (!dep->endpoint.desc) { 123372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "trying to queue request %p to disabled %s\n", 123472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi request, ep->name); 123572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -ESHUTDOWN; 123672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 123772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 123872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "queing request %p to %s length %d\n", 123972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi request, ep->name, request->length); 124072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 124172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 124272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = __dwc3_gadget_ep_queue(dep, req); 124372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 124472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 124572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 124672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 124772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 124872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_dequeue(struct usb_ep *ep, 124972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct usb_request *request) 125072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 125172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req = to_dwc3_request(request); 125272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *r = NULL; 125372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 125472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = to_dwc3_ep(ep); 125572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 125672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 125772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 125872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret = 0; 125972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 126072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 126172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 126272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_for_each_entry(r, &dep->request_list, list) { 126372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (r == req) 126472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 126572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 126672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 126772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (r != req) { 126872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_for_each_entry(r, &dep->req_queued, list) { 126972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (r == req) 127072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 127172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 127272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (r == req) { 127372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* wait until it is processed */ 1274b992e6813e257269e9599ca07be8bd52df784bf5Paul Zimmerman dwc3_stop_active_transfer(dwc, dep->number, true); 1275e8d4e8be860d935099ffcf695dcd29b55ae50b36Pratyush Anand goto out1; 127672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 127772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "request %p was not queued to %s\n", 127872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi request, ep->name); 127972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EINVAL; 128072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto out0; 128172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 128272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1283e8d4e8be860d935099ffcf695dcd29b55ae50b36Pratyush Anandout1: 128472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* giveback the request */ 128572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_giveback(dep, req, -ECONNRESET); 128672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 128772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiout0: 128872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 128972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 129072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 129172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 129272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 129372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiint __dwc3_gadget_ep_set_halt(struct dwc3_ep *dep, int value) 129472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 129572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 129672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 129772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 129872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 129972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0x00, sizeof(params)); 130072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 130172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (value) { 130272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, 130372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEPCMD_SETSTALL, ¶ms); 130472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 13053f89204bae896e1d44468886a646b84acadc3c8fDan Carpenter dev_err(dwc->dev, "failed to set STALL on %s\n", 130672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 130772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi else 130872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags |= DWC3_EP_STALL; 130972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 131072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, 131172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEPCMD_CLEARSTALL, ¶ms); 131272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 13133f89204bae896e1d44468886a646b84acadc3c8fDan Carpenter dev_err(dwc->dev, "failed to clear STALL on %s\n", 131472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 131572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi else 1316a535d81c92615b8ffb99b7e1fd1fb01effaed1afAlan Stern dep->flags &= ~(DWC3_EP_STALL | DWC3_EP_WEDGE); 131772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 13185275455a6e6ae6b57303834b0afd267bb9657ffcPaul Zimmerman 131972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 132072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 132172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 132272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_set_halt(struct usb_ep *ep, int value) 132372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 132472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = to_dwc3_ep(ep); 132572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 132672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 132772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 132872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 132972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 133072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 133172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 133272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 133316e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if (usb_endpoint_xfer_isoc(dep->endpoint.desc)) { 133472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "%s is of Isochronous type\n", dep->name); 133572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EINVAL; 133672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto out; 133772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 133872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 133972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = __dwc3_gadget_ep_set_halt(dep, value); 134072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiout: 134172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 134272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 134372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 134472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 134572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 134672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_set_wedge(struct usb_ep *ep) 134772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 134872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = to_dwc3_ep(ep); 1349249a456930cd2df29d085fb738b0e8f4bc1680cfPaul Zimmerman struct dwc3 *dwc = dep->dwc; 1350249a456930cd2df29d085fb738b0e8f4bc1680cfPaul Zimmerman unsigned long flags; 135172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1352249a456930cd2df29d085fb738b0e8f4bc1680cfPaul Zimmerman spin_lock_irqsave(&dwc->lock, flags); 135372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags |= DWC3_EP_WEDGE; 1354249a456930cd2df29d085fb738b0e8f4bc1680cfPaul Zimmerman spin_unlock_irqrestore(&dwc->lock, flags); 135572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 135608f0d96670c53898b4154e7945e77cdd966003f7Pratyush Anand if (dep->number == 0 || dep->number == 1) 135708f0d96670c53898b4154e7945e77cdd966003f7Pratyush Anand return dwc3_gadget_ep0_set_halt(ep, 1); 135808f0d96670c53898b4154e7945e77cdd966003f7Pratyush Anand else 135908f0d96670c53898b4154e7945e77cdd966003f7Pratyush Anand return dwc3_gadget_ep_set_halt(ep, 1); 136072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 136172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 136272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 136372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 136472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic struct usb_endpoint_descriptor dwc3_gadget_ep0_desc = { 136572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .bLength = USB_DT_ENDPOINT_SIZE, 136672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .bDescriptorType = USB_DT_ENDPOINT, 136772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .bmAttributes = USB_ENDPOINT_XFER_CONTROL, 136872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi}; 136972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 137072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic const struct usb_ep_ops dwc3_gadget_ep0_ops = { 137172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .enable = dwc3_gadget_ep0_enable, 137272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .disable = dwc3_gadget_ep0_disable, 137372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .alloc_request = dwc3_gadget_ep_alloc_request, 137472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .free_request = dwc3_gadget_ep_free_request, 137572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .queue = dwc3_gadget_ep0_queue, 137672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .dequeue = dwc3_gadget_ep_dequeue, 137708f0d96670c53898b4154e7945e77cdd966003f7Pratyush Anand .set_halt = dwc3_gadget_ep0_set_halt, 137872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .set_wedge = dwc3_gadget_ep_set_wedge, 137972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi}; 138072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 138172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic const struct usb_ep_ops dwc3_gadget_ep_ops = { 138272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .enable = dwc3_gadget_ep_enable, 138372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .disable = dwc3_gadget_ep_disable, 138472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .alloc_request = dwc3_gadget_ep_alloc_request, 138572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .free_request = dwc3_gadget_ep_free_request, 138672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .queue = dwc3_gadget_ep_queue, 138772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .dequeue = dwc3_gadget_ep_dequeue, 138872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .set_halt = dwc3_gadget_ep_set_halt, 138972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .set_wedge = dwc3_gadget_ep_set_wedge, 139072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi}; 139172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 139272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 139372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 139472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_get_frame(struct usb_gadget *g) 139572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 139672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 139772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 139872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 139972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 140072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return DWC3_DSTS_SOFFN(reg); 140172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 140272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 140372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_wakeup(struct usb_gadget *g) 140472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 140572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 140672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 140772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long timeout; 140872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 140972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 141072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 141172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 141272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret = 0; 141372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 141472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 link_state; 141572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 speed; 141672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 141772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 141872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 141972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 142072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * According to the Databook Remote wakeup request should 142172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * be issued only when the device is in early suspend state. 142272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 142372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We can check that via USB Link State bits in DSTS register. 142472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 142572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 142672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 142772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi speed = reg & DWC3_DSTS_CONNECTSPD; 142872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (speed == DWC3_DSTS_SUPERSPEED) { 142972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "no wakeup on SuperSpeed\n"); 143072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EINVAL; 143172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto out; 143272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 143372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 143472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi link_state = DWC3_DSTS_USBLNKST(reg); 143572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 143672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (link_state) { 143772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_LINK_STATE_RX_DET: /* in HS, means Early Suspend */ 143872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_LINK_STATE_U3: /* in HS, means SUSPEND */ 143972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 144072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 144172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "can't wakeup from link state %d\n", 144272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi link_state); 144372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EINVAL; 144472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto out; 144572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 144672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 14478598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi ret = dwc3_gadget_set_link_state(dwc, DWC3_LINK_STATE_RECOV); 14488598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi if (ret < 0) { 14498598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi dev_err(dwc->dev, "failed to put link in Recovery\n"); 14508598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi goto out; 14518598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi } 145272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1453802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman /* Recent versions do this automatically */ 1454802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman if (dwc->revision < DWC3_REVISION_194A) { 1455802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman /* write zeroes to Link Change Request */ 1456fcc023c726b5879d8f3f0f0f48c45d09055272c4Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 1457802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman reg &= ~DWC3_DCTL_ULSTCHNGREQ_MASK; 1458802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman dwc3_writel(dwc->regs, DWC3_DCTL, reg); 1459802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman } 146072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 14611d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman /* poll until Link State changes to ON */ 146272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi timeout = jiffies + msecs_to_jiffies(100); 146372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 14641d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman while (!time_after(jiffies, timeout)) { 146572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 146672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 146772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* in HS, means ON */ 146872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (DWC3_DSTS_USBLNKST(reg) == DWC3_LINK_STATE_U0) 146972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 147072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 147172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 147272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (DWC3_DSTS_USBLNKST(reg) != DWC3_LINK_STATE_U0) { 147372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to send remote wakeup\n"); 147472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EINVAL; 147572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 147672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 147772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiout: 147872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 147972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 148072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 148172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 148272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 148372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_set_selfpowered(struct usb_gadget *g, 148472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int is_selfpowered) 148572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 148672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 1487249a456930cd2df29d085fb738b0e8f4bc1680cfPaul Zimmerman unsigned long flags; 148872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1489249a456930cd2df29d085fb738b0e8f4bc1680cfPaul Zimmerman spin_lock_irqsave(&dwc->lock, flags); 149072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->is_selfpowered = !!is_selfpowered; 1491249a456930cd2df29d085fb738b0e8f4bc1680cfPaul Zimmerman spin_unlock_irqrestore(&dwc->lock, flags); 149272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 149372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 149472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 149572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 14967b2a0368bbc9bc4a7936d8587eaff4b8c35b2247Felipe Balbistatic int dwc3_gadget_run_stop(struct dwc3 *dwc, int is_on, int suspend) 149772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 149872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 149961d58242f634642de42d6a4098913b7254a65053Sebastian Andrzej Siewior u32 timeout = 500; 150072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 150172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 15028db7ed15f2557e26371e4b2d98fee290d992b715Felipe Balbi if (is_on) { 1503802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman if (dwc->revision <= DWC3_REVISION_187A) { 1504802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman reg &= ~DWC3_DCTL_TRGTULST_MASK; 1505802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman reg |= DWC3_DCTL_TRGTULST_RX_DET; 1506802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman } 1507802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman 1508802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman if (dwc->revision >= DWC3_REVISION_194A) 1509802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman reg &= ~DWC3_DCTL_KEEP_CONNECT; 1510802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman reg |= DWC3_DCTL_RUN_STOP; 15117b2a0368bbc9bc4a7936d8587eaff4b8c35b2247Felipe Balbi 15127b2a0368bbc9bc4a7936d8587eaff4b8c35b2247Felipe Balbi if (dwc->has_hibernation) 15137b2a0368bbc9bc4a7936d8587eaff4b8c35b2247Felipe Balbi reg |= DWC3_DCTL_KEEP_CONNECT; 15147b2a0368bbc9bc4a7936d8587eaff4b8c35b2247Felipe Balbi 15159fcb3bd8d12db29c101d3722d37ddef9d1915317Felipe Balbi dwc->pullups_connected = true; 15168db7ed15f2557e26371e4b2d98fee290d992b715Felipe Balbi } else { 151772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DCTL_RUN_STOP; 15187b2a0368bbc9bc4a7936d8587eaff4b8c35b2247Felipe Balbi 15197b2a0368bbc9bc4a7936d8587eaff4b8c35b2247Felipe Balbi if (dwc->has_hibernation && !suspend) 15207b2a0368bbc9bc4a7936d8587eaff4b8c35b2247Felipe Balbi reg &= ~DWC3_DCTL_KEEP_CONNECT; 15217b2a0368bbc9bc4a7936d8587eaff4b8c35b2247Felipe Balbi 15229fcb3bd8d12db29c101d3722d37ddef9d1915317Felipe Balbi dwc->pullups_connected = false; 15238db7ed15f2557e26371e4b2d98fee290d992b715Felipe Balbi } 152472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 152572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 152672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 152772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi do { 152872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 152972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (is_on) { 153072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(reg & DWC3_DSTS_DEVCTRLHLT)) 153172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 153272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 153372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (reg & DWC3_DSTS_DEVCTRLHLT) 153472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 153572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 153672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi timeout--; 153772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!timeout) 15386f17f74b3d8345663f5fcfd834145685110075bdPratyush Anand return -ETIMEDOUT; 153961d58242f634642de42d6a4098913b7254a65053Sebastian Andrzej Siewior udelay(1); 154072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } while (1); 154172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 154272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "gadget %s data soft-%s\n", 154372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver 154472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ? dwc->gadget_driver->function : "no-function", 154572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi is_on ? "connect" : "disconnect"); 15466f17f74b3d8345663f5fcfd834145685110075bdPratyush Anand 15476f17f74b3d8345663f5fcfd834145685110075bdPratyush Anand return 0; 154872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 154972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 155072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_pullup(struct usb_gadget *g, int is_on) 155172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 155272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 155372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 15546f17f74b3d8345663f5fcfd834145685110075bdPratyush Anand int ret; 155572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 155672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi is_on = !!is_on; 155772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 155872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 15597b2a0368bbc9bc4a7936d8587eaff4b8c35b2247Felipe Balbi ret = dwc3_gadget_run_stop(dwc, is_on, false); 156072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 156172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 15626f17f74b3d8345663f5fcfd834145685110075bdPratyush Anand return ret; 156372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 156472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 15658698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbistatic void dwc3_gadget_enable_irq(struct dwc3 *dwc) 15668698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi{ 15678698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi u32 reg; 15688698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi 15698698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi /* Enable all but Start and End of Frame IRQs */ 15708698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi reg = (DWC3_DEVTEN_VNDRDEVTSTRCVEDEN | 15718698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi DWC3_DEVTEN_EVNTOVERFLOWEN | 15728698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi DWC3_DEVTEN_CMDCMPLTEN | 15738698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi DWC3_DEVTEN_ERRTICERREN | 15748698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi DWC3_DEVTEN_WKUPEVTEN | 15758698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi DWC3_DEVTEN_ULSTCNGEN | 15768698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi DWC3_DEVTEN_CONNECTDONEEN | 15778698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi DWC3_DEVTEN_USBRSTEN | 15788698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi DWC3_DEVTEN_DISCONNEVTEN); 15798698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi 15808698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEVTEN, reg); 15818698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi} 15828698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi 15838698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbistatic void dwc3_gadget_disable_irq(struct dwc3 *dwc) 15848698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi{ 15858698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi /* mask all interrupts */ 15868698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEVTEN, 0x00); 15878698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi} 15888698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi 15898698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbistatic irqreturn_t dwc3_interrupt(int irq, void *_dwc); 1590b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbistatic irqreturn_t dwc3_thread_interrupt(int irq, void *_dwc); 15918698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi 159272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_start(struct usb_gadget *g, 159372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct usb_gadget_driver *driver) 159472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 159572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 159672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 159772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 159872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret = 0; 15998698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi int irq; 160072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 160172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1602b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi irq = platform_get_irq(to_platform_device(dwc->dev), 0); 1603b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi ret = request_threaded_irq(irq, dwc3_interrupt, dwc3_thread_interrupt, 1604e8adfc30ff9282a728fd8b666b6418308164c415Felipe Balbi IRQF_SHARED, "dwc3", dwc); 1605b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi if (ret) { 1606b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi dev_err(dwc->dev, "failed to request irq #%d --> %d\n", 1607b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi irq, ret); 1608b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi goto err0; 1609b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi } 1610b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi 161172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 161272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 161372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dwc->gadget_driver) { 161472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "%s is already bound to %s\n", 161572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.name, 161672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver->driver.name); 161772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EBUSY; 1618b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi goto err1; 161972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 162072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 162172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver = driver; 162272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 162372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCFG); 162472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~(DWC3_DCFG_SPEED_MASK); 162507e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi 162607e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi /** 162707e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * WORKAROUND: DWC3 revision < 2.20a have an issue 162807e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * which would cause metastability state on Run/Stop 162907e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * bit if we try to force the IP to USB2-only mode. 163007e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * 163107e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * Because of that, we cannot configure the IP to any 163207e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * speed other than the SuperSpeed 163307e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * 163407e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * Refers to: 163507e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * 163607e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * STAR#9000525659: Clock Domain Crossing on DCTL in 163707e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * USB 2.0 Mode 163807e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi */ 1639f7e846f0956917888b28b52726ee8779a39d84b6Felipe Balbi if (dwc->revision < DWC3_REVISION_220A) { 164007e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi reg |= DWC3_DCFG_SUPERSPEED; 1641f7e846f0956917888b28b52726ee8779a39d84b6Felipe Balbi } else { 1642f7e846f0956917888b28b52726ee8779a39d84b6Felipe Balbi switch (dwc->maximum_speed) { 1643f7e846f0956917888b28b52726ee8779a39d84b6Felipe Balbi case USB_SPEED_LOW: 1644f7e846f0956917888b28b52726ee8779a39d84b6Felipe Balbi reg |= DWC3_DSTS_LOWSPEED; 1645f7e846f0956917888b28b52726ee8779a39d84b6Felipe Balbi break; 1646f7e846f0956917888b28b52726ee8779a39d84b6Felipe Balbi case USB_SPEED_FULL: 1647f7e846f0956917888b28b52726ee8779a39d84b6Felipe Balbi reg |= DWC3_DSTS_FULLSPEED1; 1648f7e846f0956917888b28b52726ee8779a39d84b6Felipe Balbi break; 1649f7e846f0956917888b28b52726ee8779a39d84b6Felipe Balbi case USB_SPEED_HIGH: 1650f7e846f0956917888b28b52726ee8779a39d84b6Felipe Balbi reg |= DWC3_DSTS_HIGHSPEED; 1651f7e846f0956917888b28b52726ee8779a39d84b6Felipe Balbi break; 1652f7e846f0956917888b28b52726ee8779a39d84b6Felipe Balbi case USB_SPEED_SUPER: /* FALLTHROUGH */ 1653f7e846f0956917888b28b52726ee8779a39d84b6Felipe Balbi case USB_SPEED_UNKNOWN: /* FALTHROUGH */ 1654f7e846f0956917888b28b52726ee8779a39d84b6Felipe Balbi default: 1655f7e846f0956917888b28b52726ee8779a39d84b6Felipe Balbi reg |= DWC3_DSTS_SUPERSPEED; 1656f7e846f0956917888b28b52726ee8779a39d84b6Felipe Balbi } 1657f7e846f0956917888b28b52726ee8779a39d84b6Felipe Balbi } 165872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCFG, reg); 165972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1660b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman dwc->start_config_issued = false; 1661b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman 166272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* Start with SuperSpeed Default */ 166372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(512); 166472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 166572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[0]; 1666265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL, false, 1667265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman false); 166872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 166972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to enable %s\n", dep->name); 1670b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi goto err2; 167172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 167272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 167372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[1]; 1674265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL, false, 1675265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman false); 167672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 167772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to enable %s\n", dep->name); 1678b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi goto err3; 167972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 168072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 168172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* begin to receive SETUP packets */ 1682c7fcdeb2627c46b7ec3f0bcb2054b10405f9a70eFelipe Balbi dwc->ep0state = EP0_SETUP_PHASE; 168372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_ep0_out_start(dwc); 168472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 16858698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi dwc3_gadget_enable_irq(dwc); 16868698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi 168772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 168872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 168972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 169072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1691b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbierr3: 169272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi __dwc3_gadget_ep_disable(dwc->eps[0]); 169372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1694b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbierr2: 1695cdcedd6981194e511cc206887db661d016069d68Felipe Balbi dwc->gadget_driver = NULL; 1696b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi 1697b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbierr1: 169872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 169972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1700b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi free_irq(irq, dwc); 1701b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi 1702b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbierr0: 170372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 170472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 170572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 170672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_stop(struct usb_gadget *g, 170772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct usb_gadget_driver *driver) 170872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 170972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 171072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 17118698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi int irq; 171272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 171372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 171472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 17158698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi dwc3_gadget_disable_irq(dwc); 171672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi __dwc3_gadget_ep_disable(dwc->eps[0]); 171772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi __dwc3_gadget_ep_disable(dwc->eps[1]); 171872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 171972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver = NULL; 172072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 172172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 172272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1723b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi irq = platform_get_irq(to_platform_device(dwc->dev), 0); 1724b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi free_irq(irq, dwc); 1725b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi 172672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 172772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 1728802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman 172972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic const struct usb_gadget_ops dwc3_gadget_ops = { 173072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .get_frame = dwc3_gadget_get_frame, 173172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .wakeup = dwc3_gadget_wakeup, 173272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .set_selfpowered = dwc3_gadget_set_selfpowered, 173372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .pullup = dwc3_gadget_pullup, 173472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .udc_start = dwc3_gadget_start, 173572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .udc_stop = dwc3_gadget_stop, 173672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi}; 173772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 173872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 173972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 17406a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbistatic int dwc3_gadget_init_hw_endpoints(struct dwc3 *dwc, 17416a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi u8 num, u32 direction) 174272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 174372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 17446a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi u8 i; 174572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 17466a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi for (i = 0; i < num; i++) { 17476a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi u8 epnum = (i << 1) | (!!direction); 174872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 174972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = kzalloc(sizeof(*dep), GFP_KERNEL); 175072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dep) { 175172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "can't allocate endpoint %d\n", 175272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi epnum); 175372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -ENOMEM; 175472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 175572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 175672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->dwc = dwc; 175772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->number = epnum; 17589aa62ae4292a2450634345d79a7fa1461bf7b39cFelipe Balbi dep->direction = !!direction; 175972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->eps[epnum] = dep; 176072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 176172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi snprintf(dep->name, sizeof(dep->name), "ep%d%s", epnum >> 1, 176272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi (epnum & 1) ? "in" : "out"); 17636a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi 176472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->endpoint.name = dep->name; 176572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1766653df35e6b3c0df875999a9b842327301269f55dFelipe Balbi dev_vdbg(dwc->dev, "initializing %s\n", dep->name); 1767653df35e6b3c0df875999a9b842327301269f55dFelipe Balbi 176872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (epnum == 0 || epnum == 1) { 1769e117e742d310683b410951faeab4b13b6c3c609fRobert Baldyga usb_ep_set_maxpacket_limit(&dep->endpoint, 512); 17706048e4c69d80600baba35856651056860d5d8f5aPratyush Anand dep->endpoint.maxburst = 1; 177172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->endpoint.ops = &dwc3_gadget_ep0_ops; 177272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!epnum) 177372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ep0 = &dep->endpoint; 177472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 177572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 177672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1777e117e742d310683b410951faeab4b13b6c3c609fRobert Baldyga usb_ep_set_maxpacket_limit(&dep->endpoint, 1024); 177812d36c16bde3ee0643d705caa87723de536dbe49Sebastian Andrzej Siewior dep->endpoint.max_streams = 15; 177972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->endpoint.ops = &dwc3_gadget_ep_ops; 178072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_add_tail(&dep->endpoint.ep_list, 178172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi &dwc->gadget.ep_list); 178272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 178372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_alloc_trb_pool(dep); 178425b8ff68bf1d4954d4a9dcb4862c6b6a53cb09e2Felipe Balbi if (ret) 178572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 178672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 178725b8ff68bf1d4954d4a9dcb4862c6b6a53cb09e2Felipe Balbi 178872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi INIT_LIST_HEAD(&dep->request_list); 178972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi INIT_LIST_HEAD(&dep->req_queued); 179072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 179172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 179272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 179372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 179472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 17956a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbistatic int dwc3_gadget_init_endpoints(struct dwc3 *dwc) 17966a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi{ 17976a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi int ret; 17986a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi 17996a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi INIT_LIST_HEAD(&dwc->gadget.ep_list); 18006a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi 18016a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi ret = dwc3_gadget_init_hw_endpoints(dwc, dwc->num_out_eps, 0); 18026a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi if (ret < 0) { 18036a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi dev_vdbg(dwc->dev, "failed to allocate OUT endpoints\n"); 18046a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi return ret; 18056a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi } 18066a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi 18076a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi ret = dwc3_gadget_init_hw_endpoints(dwc, dwc->num_in_eps, 1); 18086a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi if (ret < 0) { 18096a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi dev_vdbg(dwc->dev, "failed to allocate IN endpoints\n"); 18106a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi return ret; 18116a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi } 18126a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi 18136a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi return 0; 18146a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi} 18156a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi 181672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_free_endpoints(struct dwc3 *dwc) 181772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 181872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 181972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 epnum; 182072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 182172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi for (epnum = 0; epnum < DWC3_ENDPOINTS_NUM; epnum++) { 182272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[epnum]; 18236a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi if (!dep) 18246a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi continue; 18255bf8fae33d14cc5c3c53a926f9079f92c8b082b0George Cherian /* 18265bf8fae33d14cc5c3c53a926f9079f92c8b082b0George Cherian * Physical endpoints 0 and 1 are special; they form the 18275bf8fae33d14cc5c3c53a926f9079f92c8b082b0George Cherian * bi-directional USB endpoint 0. 18285bf8fae33d14cc5c3c53a926f9079f92c8b082b0George Cherian * 18295bf8fae33d14cc5c3c53a926f9079f92c8b082b0George Cherian * For those two physical endpoints, we don't allocate a TRB 18305bf8fae33d14cc5c3c53a926f9079f92c8b082b0George Cherian * pool nor do we add them the endpoints list. Due to that, we 18315bf8fae33d14cc5c3c53a926f9079f92c8b082b0George Cherian * shouldn't do these two operations otherwise we would end up 18325bf8fae33d14cc5c3c53a926f9079f92c8b082b0George Cherian * with all sorts of bugs when removing dwc3.ko. 18335bf8fae33d14cc5c3c53a926f9079f92c8b082b0George Cherian */ 18345bf8fae33d14cc5c3c53a926f9079f92c8b082b0George Cherian if (epnum != 0 && epnum != 1) { 18355bf8fae33d14cc5c3c53a926f9079f92c8b082b0George Cherian dwc3_free_trb_pool(dep); 183672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_del(&dep->endpoint.ep_list); 18375bf8fae33d14cc5c3c53a926f9079f92c8b082b0George Cherian } 183872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 183972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi kfree(dep); 184072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 184172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 184272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 184372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 1844e5caff6831d00d96b4618de939312570527ad54aFelipe Balbi 1845e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anandstatic int __dwc3_cleanup_done_trbs(struct dwc3 *dwc, struct dwc3_ep *dep, 1846e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand struct dwc3_request *req, struct dwc3_trb *trb, 184772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct dwc3_event_depevt *event, int status) 184872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 184972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned int count; 185072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned int s_pkt = 0; 1851d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand unsigned int trb_status; 185272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1853e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if ((trb->ctrl & DWC3_TRB_CTRL_HWO) && status != -ESHUTDOWN) 1854e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand /* 1855e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * We continue despite the error. There is not much we 1856e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * can do. If we don't clean it up we loop forever. If 1857e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * we skip the TRB then it gets overwritten after a 1858e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * while since we use them in a ring buffer. A BUG() 1859e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * would help. Lets hope that if this occurs, someone 1860e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * fixes the root cause instead of looking away :) 1861e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand */ 1862e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand dev_err(dwc->dev, "%s's TRB (%p) still owned by HW\n", 1863e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand dep->name, trb); 1864e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand count = trb->size & DWC3_TRB_SIZE_MASK; 1865e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand 1866e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if (dep->direction) { 1867e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if (count) { 1868e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand trb_status = DWC3_TRB_SIZE_TRBSTS(trb->size); 1869e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if (trb_status == DWC3_TRBSTS_MISSED_ISOC) { 1870e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand dev_dbg(dwc->dev, "incomplete IN transfer %s\n", 1871e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand dep->name); 1872e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand /* 1873e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * If missed isoc occurred and there is 1874e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * no request queued then issue END 1875e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * TRANSFER, so that core generates 1876e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * next xfernotready and we will issue 1877e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * a fresh START TRANSFER. 1878e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * If there are still queued request 1879e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * then wait, do not issue either END 1880e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * or UPDATE TRANSFER, just attach next 1881e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * request in request_list during 1882e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * giveback.If any future queued request 1883e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * is successfully transferred then we 1884e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * will issue UPDATE TRANSFER for all 1885e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * request in the request_list. 1886e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand */ 1887e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand dep->flags |= DWC3_EP_MISSED_ISOC; 1888e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand } else { 1889e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand dev_err(dwc->dev, "incomplete IN transfer %s\n", 1890e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand dep->name); 1891e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand status = -ECONNRESET; 1892e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand } 1893e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand } else { 1894e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand dep->flags &= ~DWC3_EP_MISSED_ISOC; 1895e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand } 1896e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand } else { 1897e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if (count && (event->status & DEPEVT_STATUS_SHORT)) 1898e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand s_pkt = 1; 1899e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand } 1900e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand 1901e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand /* 1902e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * We assume here we will always receive the entire data block 1903e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * which we should receive. Meaning, if we program RX to 1904e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * receive 4K but we receive only 2K, we assume that's all we 1905e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * should receive and we simply bounce the request back to the 1906e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * gadget driver for further processing. 1907e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand */ 1908e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand req->request.actual += req->request.length - count; 1909e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if (s_pkt) 1910e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand return 1; 1911e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if ((event->status & DEPEVT_STATUS_LST) && 1912e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand (trb->ctrl & (DWC3_TRB_CTRL_LST | 1913e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand DWC3_TRB_CTRL_HWO))) 1914e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand return 1; 1915e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if ((event->status & DEPEVT_STATUS_IOC) && 1916e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand (trb->ctrl & DWC3_TRB_CTRL_IOC)) 1917e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand return 1; 1918e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand return 0; 1919e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand} 1920e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand 1921e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anandstatic int dwc3_cleanup_done_reqs(struct dwc3 *dwc, struct dwc3_ep *dep, 1922e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand const struct dwc3_event_depevt *event, int status) 1923e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand{ 1924e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand struct dwc3_request *req; 1925e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand struct dwc3_trb *trb; 1926e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand unsigned int slot; 1927e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand unsigned int i; 1928e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand int ret; 1929e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand 193072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi do { 193172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req = next_request(&dep->req_queued); 1932d39ee7be2aaf0a53d7b5f43c13571bac95f7cc0cSebastian Andrzej Siewior if (!req) { 1933d39ee7be2aaf0a53d7b5f43c13571bac95f7cc0cSebastian Andrzej Siewior WARN_ON_ONCE(1); 1934d39ee7be2aaf0a53d7b5f43c13571bac95f7cc0cSebastian Andrzej Siewior return 1; 1935d39ee7be2aaf0a53d7b5f43c13571bac95f7cc0cSebastian Andrzej Siewior } 1936e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand i = 0; 1937e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand do { 1938e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand slot = req->start_slot + i; 1939e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if ((slot == DWC3_TRB_NUM - 1) && 1940e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand usb_endpoint_xfer_isoc(dep->endpoint.desc)) 1941e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand slot++; 1942e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand slot %= DWC3_TRB_NUM; 1943e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand trb = &dep->trb_pool[slot]; 194472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1945e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand ret = __dwc3_cleanup_done_trbs(dwc, dep, req, trb, 1946e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand event, status); 1947e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if (ret) 1948e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand break; 1949e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand }while (++i < req->request.num_mapped_sgs); 195072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 195172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_giveback(dep, req, status); 1952e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand 1953e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if (ret) 195472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 195572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } while (1); 195672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1957cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand if (usb_endpoint_xfer_isoc(dep->endpoint.desc) && 1958cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand list_empty(&dep->req_queued)) { 1959cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand if (list_empty(&dep->request_list)) { 1960cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand /* 1961cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand * If there is no entry in request list then do 1962cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand * not issue END TRANSFER now. Just set PENDING 1963cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand * flag, so that END TRANSFER is issued when an 1964cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand * entry is added into request list. 1965cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand */ 1966cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand dep->flags = DWC3_EP_PENDING_REQUEST; 1967cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand } else { 1968b992e6813e257269e9599ca07be8bd52df784bf5Paul Zimmerman dwc3_stop_active_transfer(dwc, dep->number, true); 1969cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand dep->flags = DWC3_EP_ENABLED; 1970cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand } 19717efea86c2868b8fd9df65e589e33aebe498ce21dPratyush Anand return 1; 19727efea86c2868b8fd9df65e589e33aebe498ce21dPratyush Anand } 19737efea86c2868b8fd9df65e589e33aebe498ce21dPratyush Anand 197472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 1; 197572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 197672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 197772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_endpoint_transfer_complete(struct dwc3 *dwc, 197872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep, const struct dwc3_event_depevt *event, 197972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int start_new) 198072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 198172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned status = 0; 198272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int clean_busy; 198372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 198472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (event->status & DEPEVT_STATUS_BUSERR) 198572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi status = -ECONNRESET; 198672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 19871d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman clean_busy = dwc3_cleanup_done_reqs(dwc, dep, event, status); 1988c2df85ca31645ed3c68c56bd30a3673e034224f1Paul Zimmerman if (clean_busy) 198972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags &= ~DWC3_EP_BUSY; 1990fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1991fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi /* 1992fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * WORKAROUND: This is the 2nd half of U1/U2 -> U0 workaround. 1993fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * See dwc3_gadget_linksts_change_interrupt() for 1st half. 1994fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi */ 1995fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi if (dwc->revision < DWC3_REVISION_183A) { 1996fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi u32 reg; 1997fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi int i; 1998fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1999fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi for (i = 0; i < DWC3_ENDPOINTS_NUM; i++) { 2000348e026fafe2501281db5fb7fed599b337cad358Moiz Sonasath dep = dwc->eps[i]; 2001fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 2002fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) 2003fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi continue; 2004fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 2005fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi if (!list_empty(&dep->req_queued)) 2006fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi return; 2007fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi } 2008fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 2009fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 2010fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi reg |= dwc->u1u2; 2011fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 2012fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 2013fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi dwc->u1u2 = 0; 2014fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi } 201572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 201672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 201772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_endpoint_interrupt(struct dwc3 *dwc, 201872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct dwc3_event_depevt *event) 201972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 202072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 202172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 epnum = event->endpoint_number; 202272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 202372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[epnum]; 202472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 20253336abb5b608300550136ddab7a7101b30d45fa7Felipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) 20263336abb5b608300550136ddab7a7101b30d45fa7Felipe Balbi return; 20273336abb5b608300550136ddab7a7101b30d45fa7Felipe Balbi 202872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s: %s\n", dep->name, 202972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_ep_event_string(event->endpoint_event)); 203072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 203172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (epnum == 0 || epnum == 1) { 203272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_ep0_interrupt(dwc, event); 203372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 203472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 203572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 203672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (event->endpoint_event) { 203772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPEVT_XFERCOMPLETE: 2038b4996a8631e80a2aaddb5c487ff6b9ad37315f70Felipe Balbi dep->resource_index = 0; 2039c2df85ca31645ed3c68c56bd30a3673e034224f1Paul Zimmerman 204016e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if (usb_endpoint_xfer_isoc(dep->endpoint.desc)) { 204172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "%s is an Isochronous endpoint\n", 204272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 204372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 204472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 204572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 204672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_endpoint_transfer_complete(dwc, dep, event, 1); 204772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 204872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPEVT_XFERINPROGRESS: 204916e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if (!usb_endpoint_xfer_isoc(dep->endpoint.desc)) { 205072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "%s is not an Isochronous endpoint\n", 205172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 205272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 205372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 205472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 205572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_endpoint_transfer_complete(dwc, dep, event, 0); 205672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 205772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPEVT_XFERNOTREADY: 205816e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if (usb_endpoint_xfer_isoc(dep->endpoint.desc)) { 205972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_start_isoc(dwc, dep, event); 206072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 206172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 206272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 206372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s: reason %s\n", 206440aa41fba348bc5bd19ff5bcf2b03d67bb01d1ceFelipe Balbi dep->name, event->status & 206540aa41fba348bc5bd19ff5bcf2b03d67bb01d1ceFelipe Balbi DEPEVT_STATUS_TRANSFER_ACTIVE 206672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ? "Transfer Active" 206772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi : "Transfer Not Active"); 206872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 206972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = __dwc3_gadget_kick_transfer(dep, 0, 1); 207072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!ret || ret == -EBUSY) 207172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 207272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 207372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "%s: failed to kick transfers\n", 207472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 207572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 207672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 207772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 2078879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi case DWC3_DEPEVT_STREAMEVT: 207916e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if (!usb_endpoint_xfer_bulk(dep->endpoint.desc)) { 2080879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dev_err(dwc->dev, "Stream event for non-Bulk %s\n", 2081879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dep->name); 2082879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi return; 2083879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi } 2084879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi 2085879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi switch (event->status) { 2086879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi case DEPEVT_STREAMEVT_FOUND: 2087879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dev_vdbg(dwc->dev, "Stream %d found and started\n", 2088879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi event->parameters); 2089879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi 2090879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi break; 2091879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi case DEPEVT_STREAMEVT_NOTFOUND: 2092879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi /* FALLTHROUGH */ 2093879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi default: 2094879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dev_dbg(dwc->dev, "Couldn't find suitable stream\n"); 2095879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi } 2096879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi break; 209772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPEVT_RXTXFIFOEVT: 209872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "%s FIFO Overrun\n", dep->name); 209972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 210072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPEVT_EPCMDCMPLT: 2101ea53b8828c50b7a5138a8931c41b2671682c86b5Felipe Balbi dev_vdbg(dwc->dev, "Endpoint Command Complete\n"); 210272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 210372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 210472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 210572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 210672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_disconnect_gadget(struct dwc3 *dwc) 210772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 210872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dwc->gadget_driver && dwc->gadget_driver->disconnect) { 210972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock(&dwc->lock); 211072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver->disconnect(&dwc->gadget); 211172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock(&dwc->lock); 211272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 211372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 211472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 2115bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbistatic void dwc3_suspend_gadget(struct dwc3 *dwc) 2116bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi{ 211773a30bfc0d526db899033165db6f95c427e70505Dan Carpenter if (dwc->gadget_driver && dwc->gadget_driver->suspend) { 2118bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi spin_unlock(&dwc->lock); 2119bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi dwc->gadget_driver->suspend(&dwc->gadget); 2120bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi spin_lock(&dwc->lock); 2121bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi } 2122bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi} 2123bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi 2124bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbistatic void dwc3_resume_gadget(struct dwc3 *dwc) 2125bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi{ 212673a30bfc0d526db899033165db6f95c427e70505Dan Carpenter if (dwc->gadget_driver && dwc->gadget_driver->resume) { 2127bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi spin_unlock(&dwc->lock); 2128bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi dwc->gadget_driver->resume(&dwc->gadget); 2129bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi spin_lock(&dwc->lock); 2130bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi } 2131bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi} 2132bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi 2133b992e6813e257269e9599ca07be8bd52df784bf5Paul Zimmermanstatic void dwc3_stop_active_transfer(struct dwc3 *dwc, u32 epnum, bool force) 213472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 213572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 213672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 213772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 cmd; 213872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 213972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 214072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[epnum]; 214172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 2142b4996a8631e80a2aaddb5c487ff6b9ad37315f70Felipe Balbi if (!dep->resource_index) 21433daf74d78dfcd552445c35f1b82a271ca305ceb9Pratyush Anand return; 21443daf74d78dfcd552445c35f1b82a271ca305ceb9Pratyush Anand 214557911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand /* 214657911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * NOTICE: We are violating what the Databook says about the 214757911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * EndTransfer command. Ideally we would _always_ wait for the 214857911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * EndTransfer Command Completion IRQ, but that's causing too 214957911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * much trouble synchronizing between us and gadget driver. 215057911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * 215157911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * We have discussed this with the IP Provider and it was 215257911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * suggested to giveback all requests here, but give HW some 215357911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * extra time to synchronize with the interconnect. We're using 215457911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * an arbitraty 100us delay for that. 215557911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * 215657911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * Note also that a similar handling was tested by Synopsys 215757911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * (thanks a lot Paul) and nothing bad has come out of it. 215857911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * In short, what we're doing is: 215957911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * 216057911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * - Issue EndTransfer WITH CMDIOC bit set 216157911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * - Wait 100us 216257911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand */ 216357911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand 21643daf74d78dfcd552445c35f1b82a271ca305ceb9Pratyush Anand cmd = DWC3_DEPCMD_ENDTRANSFER; 2165b992e6813e257269e9599ca07be8bd52df784bf5Paul Zimmerman cmd |= force ? DWC3_DEPCMD_HIPRI_FORCERM : 0; 2166b992e6813e257269e9599ca07be8bd52df784bf5Paul Zimmerman cmd |= DWC3_DEPCMD_CMDIOC; 2167b4996a8631e80a2aaddb5c487ff6b9ad37315f70Felipe Balbi cmd |= DWC3_DEPCMD_PARAM(dep->resource_index); 21683daf74d78dfcd552445c35f1b82a271ca305ceb9Pratyush Anand memset(¶ms, 0, sizeof(params)); 21693daf74d78dfcd552445c35f1b82a271ca305ceb9Pratyush Anand ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, cmd, ¶ms); 21703daf74d78dfcd552445c35f1b82a271ca305ceb9Pratyush Anand WARN_ON_ONCE(ret); 2171b4996a8631e80a2aaddb5c487ff6b9ad37315f70Felipe Balbi dep->resource_index = 0; 2172041d81f493d90c940ec41f0ec98bc7c4f2fba431Felipe Balbi dep->flags &= ~DWC3_EP_BUSY; 217357911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand udelay(100); 217472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 217572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 217672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_stop_active_transfers(struct dwc3 *dwc) 217772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 217872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 epnum; 217972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 218072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi for (epnum = 2; epnum < DWC3_ENDPOINTS_NUM; epnum++) { 218172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 218272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 218372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[epnum]; 21846a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi if (!dep) 21856a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi continue; 21866a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi 218772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) 218872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi continue; 218972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 2190624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior dwc3_remove_requests(dwc, dep); 219172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 219272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 219372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 219472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_clear_stall_all_ep(struct dwc3 *dwc) 219572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 219672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 epnum; 219772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 219872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi for (epnum = 1; epnum < DWC3_ENDPOINTS_NUM; epnum++) { 219972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 220072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 220172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 220272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 220372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[epnum]; 22046a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi if (!dep) 22056a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi continue; 220672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 220772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(dep->flags & DWC3_EP_STALL)) 220872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi continue; 220972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 221072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags &= ~DWC3_EP_STALL; 221172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 221272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0, sizeof(params)); 221372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, 221472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEPCMD_CLEARSTALL, ¶ms); 221572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi WARN_ON_ONCE(ret); 221672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 221772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 221872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 221972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_disconnect_interrupt(struct dwc3 *dwc) 222072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 2221c4430a26948b84c0d820e83f8c640229f960d3b6Felipe Balbi int reg; 2222c4430a26948b84c0d820e83f8c640229f960d3b6Felipe Balbi 222372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s\n", __func__); 222472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 222572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 222672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DCTL_INITU1ENA; 222772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 222872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 222972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DCTL_INITU2ENA; 223072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 223172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 223272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_disconnect_gadget(dwc); 2233b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman dwc->start_config_issued = false; 223472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 223572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_UNKNOWN; 2236df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi dwc->setup_packet_pending = false; 223772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 223872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 223972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_reset_interrupt(struct dwc3 *dwc) 224072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 224172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 224272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 224372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s\n", __func__); 224472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 2245df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi /* 2246df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * WORKAROUND: DWC3 revisions <1.88a have an issue which 2247df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * would cause a missing Disconnect Event if there's a 2248df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * pending Setup Packet in the FIFO. 2249df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * 2250df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * There's no suggested workaround on the official Bug 2251df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * report, which states that "unless the driver/application 2252df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * is doing any special handling of a disconnect event, 2253df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * there is no functional issue". 2254df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * 2255df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * Unfortunately, it turns out that we _do_ some special 2256df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * handling of a disconnect event, namely complete all 2257df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * pending transfers, notify gadget driver of the 2258df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * disconnection, and so on. 2259df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * 2260df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * Our suggested workaround is to follow the Disconnect 2261df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * Event steps here, instead, based on a setup_packet_pending 2262df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * flag. Such flag gets set whenever we have a XferNotReady 2263df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * event on EP0 and gets cleared on XferComplete for the 2264df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * same endpoint. 2265df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * 2266df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * Refers to: 2267df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * 2268df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * STAR#9000466709: RTL: Device : Disconnect event not 2269df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * generated if setup packet pending in FIFO 2270df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi */ 2271df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi if (dwc->revision < DWC3_REVISION_188A) { 2272df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi if (dwc->setup_packet_pending) 2273df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi dwc3_gadget_disconnect_interrupt(dwc); 2274df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi } 2275df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi 2276961906edb549c95f4cc33e4f3dbfd0fcc364954dFelipe Balbi /* after reset -> Default State */ 227714cd592f72ea1ce1a25d7a576a5ed6aa761456bcFelipe Balbi usb_gadget_set_state(&dwc->gadget, USB_STATE_DEFAULT); 2278961906edb549c95f4cc33e4f3dbfd0fcc364954dFelipe Balbi 227972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dwc->gadget.speed != USB_SPEED_UNKNOWN) 228072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_disconnect_gadget(dwc); 228172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 228272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 228372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DCTL_TSTCTRL_MASK; 228472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 22853b637367ae40b6d3c20e30cb0cdd059e67bbf848Gerard Cauvy dwc->test_mode = false; 228672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 228772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_stop_active_transfers(dwc); 228872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_clear_stall_all_ep(dwc); 2289b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman dwc->start_config_issued = false; 229072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 229172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* Reset device address to zero */ 229272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCFG); 229372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~(DWC3_DCFG_DEVADDR_MASK); 229472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCFG, reg); 229572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 229672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 229772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_update_ram_clk_sel(struct dwc3 *dwc, u32 speed) 229872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 229972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 230072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 usb30_clock = DWC3_GCTL_CLK_BUS; 230172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 230272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 230372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We change the clock only at SS but I dunno why I would want to do 230472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * this. Maybe it becomes part of the power saving plan. 230572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 230672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 230772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (speed != DWC3_DSTS_SUPERSPEED) 230872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 230972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 231072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 231172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * RAMClkSel is reset to 0 after USB reset, so it must be reprogrammed 231272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * each time on Connect Done. 231372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 231472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!usb30_clock) 231572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 231672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 231772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_GCTL); 231872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg |= DWC3_GCTL_RAMCLKSEL(usb30_clock); 231972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_GCTL, reg); 232072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 232172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 232272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_conndone_interrupt(struct dwc3 *dwc) 232372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 232472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 232572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 232672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 232772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 speed; 232872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 232972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s\n", __func__); 233072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 233172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 233272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi speed = reg & DWC3_DSTS_CONNECTSPD; 233372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->speed = speed; 233472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 233572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_update_ram_clk_sel(dwc, speed); 233672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 233772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (speed) { 233872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DCFG_SUPERSPEED: 233905870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi /* 234005870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * WORKAROUND: DWC3 revisions <1.90a have an issue which 234105870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * would cause a missing USB3 Reset event. 234205870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * 234305870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * In such situations, we should force a USB3 Reset 234405870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * event by calling our dwc3_gadget_reset_interrupt() 234505870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * routine. 234605870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * 234705870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * Refers to: 234805870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * 234905870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * STAR#9000483510: RTL: SS : USB3 reset event may 235005870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * not be generated always when the link enters poll 235105870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi */ 235205870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi if (dwc->revision < DWC3_REVISION_190A) 235305870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi dwc3_gadget_reset_interrupt(dwc); 235405870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi 235572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(512); 235672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ep0->maxpacket = 512; 235772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_SUPER; 235872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 235972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DCFG_HIGHSPEED: 236072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(64); 236172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ep0->maxpacket = 64; 236272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_HIGH; 236372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 236472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DCFG_FULLSPEED2: 236572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DCFG_FULLSPEED1: 236672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(64); 236772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ep0->maxpacket = 64; 236872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_FULL; 236972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 237072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DCFG_LOWSPEED: 237172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(8); 237272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ep0->maxpacket = 8; 237372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_LOW; 237472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 237572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 237672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 23772b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand /* Enable USB2 LPM Capability */ 23782b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand 23792b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand if ((dwc->revision > DWC3_REVISION_194A) 23802b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand && (speed != DWC3_DCFG_SUPERSPEED)) { 23812b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand reg = dwc3_readl(dwc->regs, DWC3_DCFG); 23822b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand reg |= DWC3_DCFG_LPM_CAP; 23832b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand dwc3_writel(dwc->regs, DWC3_DCFG, reg); 23842b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand 23852b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand reg = dwc3_readl(dwc->regs, DWC3_DCTL); 23862b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand reg &= ~(DWC3_DCTL_HIRD_THRES_MASK | DWC3_DCTL_L1_HIBER_EN); 23872b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand 23881a947746dbe1486d0e305ab512ddf085b7874cb3Felipe Balbi /* 23891a947746dbe1486d0e305ab512ddf085b7874cb3Felipe Balbi * TODO: This should be configurable. For now using 23901a947746dbe1486d0e305ab512ddf085b7874cb3Felipe Balbi * maximum allowed HIRD threshold value of 0b1100 23911a947746dbe1486d0e305ab512ddf085b7874cb3Felipe Balbi */ 23921a947746dbe1486d0e305ab512ddf085b7874cb3Felipe Balbi reg |= DWC3_DCTL_HIRD_THRES(12); 23932b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand 23942b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand dwc3_writel(dwc->regs, DWC3_DCTL, reg); 2395356363bf6b2fc4785d874ef87ed2fad4b8543490Felipe Balbi } else { 2396356363bf6b2fc4785d874ef87ed2fad4b8543490Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 2397356363bf6b2fc4785d874ef87ed2fad4b8543490Felipe Balbi reg &= ~DWC3_DCTL_HIRD_THRES_MASK; 2398356363bf6b2fc4785d874ef87ed2fad4b8543490Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 23992b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand } 24002b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand 240172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[0]; 2402265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL, true, 2403265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman false); 240472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 240572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to enable %s\n", dep->name); 240672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 240772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 240872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 240972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[1]; 2410265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL, true, 2411265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman false); 241272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 241372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to enable %s\n", dep->name); 241472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 241572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 241672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 241772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 241872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Configure PHY via GUSB3PIPECTLn if required. 241972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 242072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Update GTXFIFOSIZn 242172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 242272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * In both cases reset values should be sufficient. 242372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 242472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 242572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 242672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_wakeup_interrupt(struct dwc3 *dwc) 242772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 242872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s\n", __func__); 242972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 243072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 243172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * TODO take core out of low power mode when that's 243272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * implemented. 243372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 243472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 243572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver->resume(&dwc->gadget); 243672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 243772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 243872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_linksts_change_interrupt(struct dwc3 *dwc, 243972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned int evtinfo) 244072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 2441fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi enum dwc3_link_state next = evtinfo & DWC3_LINK_STATE_MASK; 24420b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi unsigned int pwropt; 24430b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi 24440b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi /* 24450b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi * WORKAROUND: DWC3 < 2.50a have an issue when configured without 24460b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi * Hibernation mode enabled which would show up when device detects 24470b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi * host-initiated U3 exit. 24480b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi * 24490b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi * In that case, device will generate a Link State Change Interrupt 24500b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi * from U3 to RESUME which is only necessary if Hibernation is 24510b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi * configured in. 24520b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi * 24530b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi * There are no functional changes due to such spurious event and we 24540b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi * just need to ignore it. 24550b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi * 24560b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi * Refers to: 24570b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi * 24580b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi * STAR#9000570034 RTL: SS Resume event generated in non-Hibernation 24590b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi * operational mode 24600b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi */ 24610b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi pwropt = DWC3_GHWPARAMS1_EN_PWROPT(dwc->hwparams.hwparams1); 24620b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi if ((dwc->revision < DWC3_REVISION_250A) && 24630b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi (pwropt != DWC3_GHWPARAMS1_EN_PWROPT_HIB)) { 24640b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi if ((dwc->link_state == DWC3_LINK_STATE_U3) && 24650b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi (next == DWC3_LINK_STATE_RESUME)) { 24660b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi dev_vdbg(dwc->dev, "ignoring transition U3 -> Resume\n"); 24670b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi return; 24680b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi } 24690b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi } 2470fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 2471fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi /* 2472fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * WORKAROUND: DWC3 Revisions <1.83a have an issue which, depending 2473fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * on the link partner, the USB session might do multiple entry/exit 2474fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * of low power states before a transfer takes place. 2475fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * 2476fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * Due to this problem, we might experience lower throughput. The 2477fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * suggested workaround is to disable DCTL[12:9] bits if we're 2478fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * transitioning from U1/U2 to U0 and enable those bits again 2479fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * after a transfer completes and there are no pending transfers 2480fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * on any of the enabled endpoints. 2481fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * 2482fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * This is the first half of that workaround. 2483fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * 2484fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * Refers to: 2485fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * 2486fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * STAR#9000446952: RTL: Device SS : if U1/U2 ->U0 takes >128us 2487fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * core send LGO_Ux entering U0 2488fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi */ 2489fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi if (dwc->revision < DWC3_REVISION_183A) { 2490fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi if (next == DWC3_LINK_STATE_U0) { 2491fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi u32 u1u2; 2492fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi u32 reg; 2493fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 2494fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi switch (dwc->link_state) { 2495fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi case DWC3_LINK_STATE_U1: 2496fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi case DWC3_LINK_STATE_U2: 2497fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 2498fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi u1u2 = reg & (DWC3_DCTL_INITU2ENA 2499fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi | DWC3_DCTL_ACCEPTU2ENA 2500fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi | DWC3_DCTL_INITU1ENA 2501fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi | DWC3_DCTL_ACCEPTU1ENA); 2502fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 2503fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi if (!dwc->u1u2) 2504fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi dwc->u1u2 = reg & u1u2; 2505fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 2506fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi reg &= ~u1u2; 2507fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 2508fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 2509fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi break; 2510fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi default: 2511fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi /* do nothing */ 2512fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi break; 2513fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi } 2514fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi } 2515fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi } 2516fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 2517bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi switch (next) { 2518bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi case DWC3_LINK_STATE_U1: 2519bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi if (dwc->speed == USB_SPEED_SUPER) 2520bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi dwc3_suspend_gadget(dwc); 2521bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi break; 2522bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi case DWC3_LINK_STATE_U2: 2523bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi case DWC3_LINK_STATE_U3: 2524bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi dwc3_suspend_gadget(dwc); 2525bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi break; 2526bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi case DWC3_LINK_STATE_RESUME: 2527bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi dwc3_resume_gadget(dwc); 2528bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi break; 2529bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi default: 2530bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi /* do nothing */ 2531bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi break; 2532bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi } 2533bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi 2534e57ebc1db6ef796124b69abca044a373b9110a47Felipe Balbi dev_vdbg(dwc->dev, "link change: %s [%d] -> %s [%d]\n", 2535e57ebc1db6ef796124b69abca044a373b9110a47Felipe Balbi dwc3_gadget_link_string(dwc->link_state), 2536e57ebc1db6ef796124b69abca044a373b9110a47Felipe Balbi dwc->link_state, dwc3_gadget_link_string(next), next); 2537e57ebc1db6ef796124b69abca044a373b9110a47Felipe Balbi 2538e57ebc1db6ef796124b69abca044a373b9110a47Felipe Balbi dwc->link_state = next; 253972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 254072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 2541e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbistatic void dwc3_gadget_hibernation_interrupt(struct dwc3 *dwc, 2542e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi unsigned int evtinfo) 2543e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi{ 2544e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi unsigned int is_ss = evtinfo & BIT(4); 2545e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi 2546e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi /** 2547e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi * WORKAROUND: DWC3 revison 2.20a with hibernation support 2548e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi * have a known issue which can cause USB CV TD.9.23 to fail 2549e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi * randomly. 2550e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi * 2551e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi * Because of this issue, core could generate bogus hibernation 2552e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi * events which SW needs to ignore. 2553e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi * 2554e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi * Refers to: 2555e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi * 2556e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi * STAR#9000546576: Device Mode Hibernation: Issue in USB 2.0 2557e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi * Device Fallback from SuperSpeed 2558e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi */ 2559e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi if (is_ss ^ (dwc->speed == USB_SPEED_SUPER)) 2560e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi return; 2561e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi 2562e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi /* enter hibernation here */ 2563e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi} 2564e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi 256572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_interrupt(struct dwc3 *dwc, 256672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct dwc3_event_devt *event) 256772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 256872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (event->type) { 256972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_DISCONNECT: 257072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_disconnect_interrupt(dwc); 257172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 257272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_RESET: 257372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_reset_interrupt(dwc); 257472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 257572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_CONNECT_DONE: 257672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_conndone_interrupt(dwc); 257772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 257872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_WAKEUP: 257972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_wakeup_interrupt(dwc); 258072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 2581e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi case DWC3_DEVICE_EVENT_HIBER_REQ: 2582e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi if (dev_WARN_ONCE(dwc->dev, !dwc->has_hibernation, 2583e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi "unexpected hibernation event\n")) 2584e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi break; 2585e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi 2586e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi dwc3_gadget_hibernation_interrupt(dwc, event->event_info); 2587e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi break; 258872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_LINK_STATUS_CHANGE: 258972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_linksts_change_interrupt(dwc, event->event_info); 259072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 259172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_EOPF: 259272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "End of Periodic Frame\n"); 259372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 259472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_SOF: 259572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "Start of Periodic Frame\n"); 259672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 259772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_ERRATIC_ERROR: 259872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "Erratic Error\n"); 259972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 260072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_CMD_CMPL: 260172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "Command Complete\n"); 260272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 260372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_OVERFLOW: 260472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "Overflow\n"); 260572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 260672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 260772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "UNKNOWN IRQ %d\n", event->type); 260872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 260972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 261072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 261172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_process_event_entry(struct dwc3 *dwc, 261272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const union dwc3_event *event) 261372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 261472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* Endpoint IRQ, handle it and return early */ 261572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (event->type.is_devspec == 0) { 261672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* depevt */ 261772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return dwc3_endpoint_interrupt(dwc, &event->depevt); 261872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 261972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 262072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (event->type.type) { 262172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_EVENT_TYPE_DEV: 262272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_interrupt(dwc, &event->devt); 262372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 262472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* REVISIT what to do with Carkit and I2C events ? */ 262572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 262672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "UNKNOWN IRQ type %d\n", event->raw); 262772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 262872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 262972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 2630f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbistatic irqreturn_t dwc3_process_event_buf(struct dwc3 *dwc, u32 buf) 2631b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi{ 2632f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi struct dwc3_event_buffer *evt; 2633b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi irqreturn_t ret = IRQ_NONE; 2634f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi int left; 2635e8adfc30ff9282a728fd8b666b6418308164c415Felipe Balbi u32 reg; 2636b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi 2637f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi evt = dwc->ev_buffs[buf]; 2638f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi left = evt->count; 2639b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi 2640f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi if (!(evt->flags & DWC3_EVENT_PENDING)) 2641f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi return IRQ_NONE; 2642b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi 2643f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi while (left > 0) { 2644f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi union dwc3_event event; 2645b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi 2646f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi event.raw = *(u32 *) (evt->buf + evt->lpos); 2647b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi 2648f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi dwc3_process_event_entry(dwc, &event); 2649b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi 2650f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi /* 2651f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi * FIXME we wrap around correctly to the next entry as 2652f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi * almost all entries are 4 bytes in size. There is one 2653f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi * entry which has 12 bytes which is a regular entry 2654f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi * followed by 8 bytes data. ATM I don't know how 2655f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi * things are organized if we get next to the a 2656f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi * boundary so I worry about that once we try to handle 2657f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi * that. 2658f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi */ 2659f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi evt->lpos = (evt->lpos + 4) % DWC3_EVENT_BUFFERS_SIZE; 2660f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi left -= 4; 2661b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi 2662f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi dwc3_writel(dwc->regs, DWC3_GEVNTCOUNT(buf), 4); 2663f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi } 2664b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi 2665f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi evt->count = 0; 2666f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi evt->flags &= ~DWC3_EVENT_PENDING; 2667f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi ret = IRQ_HANDLED; 2668b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi 2669f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi /* Unmask interrupt */ 2670f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi reg = dwc3_readl(dwc->regs, DWC3_GEVNTSIZ(buf)); 2671f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi reg &= ~DWC3_GEVNTSIZ_INTMASK; 2672f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi dwc3_writel(dwc->regs, DWC3_GEVNTSIZ(buf), reg); 2673b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi 2674f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi return ret; 2675f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi} 2676e8adfc30ff9282a728fd8b666b6418308164c415Felipe Balbi 2677f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbistatic irqreturn_t dwc3_thread_interrupt(int irq, void *_dwc) 2678f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi{ 2679f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi struct dwc3 *dwc = _dwc; 2680f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi unsigned long flags; 2681f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi irqreturn_t ret = IRQ_NONE; 2682f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi int i; 2683f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi 2684f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi spin_lock_irqsave(&dwc->lock, flags); 2685f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi 2686f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi for (i = 0; i < dwc->num_event_buffers; i++) 2687f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi ret |= dwc3_process_event_buf(dwc, i); 2688b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi 2689b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 2690b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi 2691b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi return ret; 2692b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi} 2693b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi 26947f97aa9865800766e570d0e1be772a034dd30388Felipe Balbistatic irqreturn_t dwc3_check_event_buf(struct dwc3 *dwc, u32 buf) 269572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 269672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_event_buffer *evt; 269772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 count; 2698e8adfc30ff9282a728fd8b666b6418308164c415Felipe Balbi u32 reg; 269972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 2700b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi evt = dwc->ev_buffs[buf]; 2701b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi 270272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi count = dwc3_readl(dwc->regs, DWC3_GEVNTCOUNT(buf)); 270372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi count &= DWC3_GEVNTCOUNT_MASK; 270472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!count) 270572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return IRQ_NONE; 270672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 2707b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi evt->count = count; 2708b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi evt->flags |= DWC3_EVENT_PENDING; 270972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 2710e8adfc30ff9282a728fd8b666b6418308164c415Felipe Balbi /* Mask interrupt */ 2711e8adfc30ff9282a728fd8b666b6418308164c415Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_GEVNTSIZ(buf)); 2712e8adfc30ff9282a728fd8b666b6418308164c415Felipe Balbi reg |= DWC3_GEVNTSIZ_INTMASK; 2713e8adfc30ff9282a728fd8b666b6418308164c415Felipe Balbi dwc3_writel(dwc->regs, DWC3_GEVNTSIZ(buf), reg); 2714e8adfc30ff9282a728fd8b666b6418308164c415Felipe Balbi 2715b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi return IRQ_WAKE_THREAD; 271672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 271772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 271872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic irqreturn_t dwc3_interrupt(int irq, void *_dwc) 271972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 272072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = _dwc; 272172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int i; 272272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi irqreturn_t ret = IRQ_NONE; 272372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 272472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock(&dwc->lock); 272572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 27269f622b2a407d8b34a5a7f5b4abd8b29b25cf4f32Felipe Balbi for (i = 0; i < dwc->num_event_buffers; i++) { 272772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi irqreturn_t status; 272872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 27297f97aa9865800766e570d0e1be772a034dd30388Felipe Balbi status = dwc3_check_event_buf(dwc, i); 2730b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi if (status == IRQ_WAKE_THREAD) 273172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = status; 273272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 273372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 273472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock(&dwc->lock); 273572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 273672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 273772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 273872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 273972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/** 274072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * dwc3_gadget_init - Initializes gadget related registers 27411d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * @dwc: pointer to our controller context structure 274272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 274372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Returns 0 on success otherwise negative errno. 274472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 274541ac7b3ab7fe1d6175839947a877fdf95cbd2211Bill Pembertonint dwc3_gadget_init(struct dwc3 *dwc) 274672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 274772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 274872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 274972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ctrl_req = dma_alloc_coherent(dwc->dev, sizeof(*dwc->ctrl_req), 275072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi &dwc->ctrl_req_addr, GFP_KERNEL); 275172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dwc->ctrl_req) { 275272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to allocate ctrl request\n"); 275372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -ENOMEM; 275472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto err0; 275572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 275672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 275772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ep0_trb = dma_alloc_coherent(dwc->dev, sizeof(*dwc->ep0_trb), 275872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi &dwc->ep0_trb_addr, GFP_KERNEL); 275972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dwc->ep0_trb) { 276072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to allocate ep0 trb\n"); 276172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -ENOMEM; 276272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto err1; 276372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 276472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 27653ef35fafdc87b72851f7785dc5331a0f4eb1b3ceFelipe Balbi dwc->setup_buf = kzalloc(DWC3_EP0_BOUNCE_SIZE, GFP_KERNEL); 276672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dwc->setup_buf) { 276772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to allocate setup buffer\n"); 276872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -ENOMEM; 276972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto err2; 277072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 277172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 27725812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi dwc->ep0_bounce = dma_alloc_coherent(dwc->dev, 27733ef35fafdc87b72851f7785dc5331a0f4eb1b3ceFelipe Balbi DWC3_EP0_BOUNCE_SIZE, &dwc->ep0_bounce_addr, 27743ef35fafdc87b72851f7785dc5331a0f4eb1b3ceFelipe Balbi GFP_KERNEL); 27755812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi if (!dwc->ep0_bounce) { 27765812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi dev_err(dwc->dev, "failed to allocate ep0 bounce buffer\n"); 27775812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi ret = -ENOMEM; 27785812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi goto err3; 27795812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi } 27805812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi 278172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ops = &dwc3_gadget_ops; 2782d327ab5b6d660d6fe22b073b743fde1668e593bbMichal Nazarewicz dwc->gadget.max_speed = USB_SPEED_SUPER; 278372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_UNKNOWN; 2784eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dwc->gadget.sg_supported = true; 278572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.name = "dwc3-gadget"; 278672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 278772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 2788a4b9d94b3dc8e65951c1819d37f213b3c6815adcDavid Cohen * Per databook, DWC3 needs buffer size to be aligned to MaxPacketSize 2789a4b9d94b3dc8e65951c1819d37f213b3c6815adcDavid Cohen * on ep out. 2790a4b9d94b3dc8e65951c1819d37f213b3c6815adcDavid Cohen */ 2791a4b9d94b3dc8e65951c1819d37f213b3c6815adcDavid Cohen dwc->gadget.quirk_ep_out_aligned_size = true; 2792a4b9d94b3dc8e65951c1819d37f213b3c6815adcDavid Cohen 2793a4b9d94b3dc8e65951c1819d37f213b3c6815adcDavid Cohen /* 279472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * REVISIT: Here we should clear all pending IRQs to be 279572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * sure we're starting from a well known location. 279672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 279772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 279872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_gadget_init_endpoints(dwc); 279972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 28005812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi goto err4; 280172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 280272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = usb_add_gadget_udc(dwc->dev, &dwc->gadget); 280372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 280472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to register udc\n"); 2805e1f804676a95b9d5caaa3a822d90bc1101595468David Cohen goto err4; 280672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 280772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 280872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 280972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 28105812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbierr4: 2811e1f804676a95b9d5caaa3a822d90bc1101595468David Cohen dwc3_gadget_free_endpoints(dwc); 28123ef35fafdc87b72851f7785dc5331a0f4eb1b3ceFelipe Balbi dma_free_coherent(dwc->dev, DWC3_EP0_BOUNCE_SIZE, 28133ef35fafdc87b72851f7785dc5331a0f4eb1b3ceFelipe Balbi dwc->ep0_bounce, dwc->ep0_bounce_addr); 28145812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi 281572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbierr3: 28160fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi kfree(dwc->setup_buf); 281772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 281872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbierr2: 281972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(*dwc->ep0_trb), 282072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ep0_trb, dwc->ep0_trb_addr); 282172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 282272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbierr1: 282372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(*dwc->ctrl_req), 282472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ctrl_req, dwc->ctrl_req_addr); 282572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 282672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbierr0: 282772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 282872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 282972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 28307415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi/* -------------------------------------------------------------------------- */ 28317415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 283272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbivoid dwc3_gadget_exit(struct dwc3 *dwc) 283372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 283472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi usb_del_gadget_udc(&dwc->gadget); 283572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 283672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_free_endpoints(dwc); 283772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 28383ef35fafdc87b72851f7785dc5331a0f4eb1b3ceFelipe Balbi dma_free_coherent(dwc->dev, DWC3_EP0_BOUNCE_SIZE, 28393ef35fafdc87b72851f7785dc5331a0f4eb1b3ceFelipe Balbi dwc->ep0_bounce, dwc->ep0_bounce_addr); 28405812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi 28410fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi kfree(dwc->setup_buf); 284272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 284372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(*dwc->ep0_trb), 284472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ep0_trb, dwc->ep0_trb_addr); 284572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 284672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(*dwc->ctrl_req), 284772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ctrl_req, dwc->ctrl_req_addr); 284872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 28497415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 28507415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbiint dwc3_gadget_prepare(struct dwc3 *dwc) 28517415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi{ 28527b2a0368bbc9bc4a7936d8587eaff4b8c35b2247Felipe Balbi if (dwc->pullups_connected) { 28537415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi dwc3_gadget_disable_irq(dwc); 28547b2a0368bbc9bc4a7936d8587eaff4b8c35b2247Felipe Balbi dwc3_gadget_run_stop(dwc, true, true); 28557b2a0368bbc9bc4a7936d8587eaff4b8c35b2247Felipe Balbi } 28567415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 28577415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi return 0; 28587415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi} 28597415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 28607415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbivoid dwc3_gadget_complete(struct dwc3 *dwc) 28617415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi{ 28627415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi if (dwc->pullups_connected) { 28637415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi dwc3_gadget_enable_irq(dwc); 28647b2a0368bbc9bc4a7936d8587eaff4b8c35b2247Felipe Balbi dwc3_gadget_run_stop(dwc, true, false); 28657415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi } 28667415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi} 28677415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 28687415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbiint dwc3_gadget_suspend(struct dwc3 *dwc) 28697415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi{ 28707415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi __dwc3_gadget_ep_disable(dwc->eps[0]); 28717415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi __dwc3_gadget_ep_disable(dwc->eps[1]); 28727415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 28737415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi dwc->dcfg = dwc3_readl(dwc->regs, DWC3_DCFG); 28747415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 28757415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi return 0; 28767415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi} 28777415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 28787415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbiint dwc3_gadget_resume(struct dwc3 *dwc) 28797415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi{ 28807415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi struct dwc3_ep *dep; 28817415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi int ret; 28827415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 28837415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi /* Start with SuperSpeed Default */ 28847415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(512); 28857415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 28867415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi dep = dwc->eps[0]; 2887265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL, false, 2888265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman false); 28897415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi if (ret) 28907415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi goto err0; 28917415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 28927415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi dep = dwc->eps[1]; 2893265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL, false, 2894265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman false); 28957415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi if (ret) 28967415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi goto err1; 28977415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 28987415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi /* begin to receive SETUP packets */ 28997415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi dwc->ep0state = EP0_SETUP_PHASE; 29007415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi dwc3_ep0_out_start(dwc); 29017415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 29027415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCFG, dwc->dcfg); 29037415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 29047415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi return 0; 29057415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 29067415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbierr1: 29077415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi __dwc3_gadget_ep_disable(dwc->eps[0]); 29087415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 29097415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbierr0: 29107415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi return ret; 29117415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi} 2912