gadget.c revision b997ada5db905e24494bcc689c7b2c07d278ca27
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 305b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbiint dwc3_send_gadget_generic_command(struct dwc3 *dwc, int cmd, u32 param) 306b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi{ 307b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi u32 timeout = 500; 308b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi u32 reg; 309b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi 310b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi dwc3_writel(dwc->regs, DWC3_DGCMDPAR, param); 311b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi dwc3_writel(dwc->regs, DWC3_DGCMD, cmd | DWC3_DGCMD_CMDACT); 312b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi 313b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi do { 314b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DGCMD); 315b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi if (!(reg & DWC3_DGCMD_CMDACT)) { 316b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi dev_vdbg(dwc->dev, "Command Complete --> %d\n", 317b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi DWC3_DGCMD_STATUS(reg)); 318b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi return 0; 319b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi } 320b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi 321b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi /* 322b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi * We can't sleep here, because it's also called from 323b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi * interrupt context. 324b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi */ 325b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi timeout--; 326b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi if (!timeout) 327b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi return -ETIMEDOUT; 328b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi udelay(1); 329b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi } while (1); 330b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi} 331b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi 33272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiint dwc3_send_gadget_ep_cmd(struct dwc3 *dwc, unsigned ep, 33372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned cmd, struct dwc3_gadget_ep_cmd_params *params) 33472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 33572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = dwc->eps[ep]; 33661d58242f634642de42d6a4098913b7254a65053Sebastian Andrzej Siewior u32 timeout = 500; 33772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 33872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 33972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s: cmd '%s' params %08x %08x %08x\n", 34072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name, 341dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi dwc3_gadget_ep_cmd_string(cmd), params->param0, 342dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params->param1, params->param2); 34372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 344dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEPCMDPAR0(ep), params->param0); 345dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEPCMDPAR1(ep), params->param1); 346dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEPCMDPAR2(ep), params->param2); 34772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 34872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEPCMD(ep), cmd | DWC3_DEPCMD_CMDACT); 34972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi do { 35072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DEPCMD(ep)); 35172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(reg & DWC3_DEPCMD_CMDACT)) { 352164f6e141ed214bda30fb219d41ec3254bd90886Felipe Balbi dev_vdbg(dwc->dev, "Command Complete --> %d\n", 353164f6e141ed214bda30fb219d41ec3254bd90886Felipe Balbi DWC3_DEPCMD_STATUS(reg)); 35472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 35572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 35672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 35772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 35872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We can't sleep here, because it is also called from 35972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * interrupt context. 36072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 36172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi timeout--; 36272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!timeout) 36372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -ETIMEDOUT; 36472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 36561d58242f634642de42d6a4098913b7254a65053Sebastian Andrzej Siewior udelay(1); 36672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } while (1); 36772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 36872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 36972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic dma_addr_t dwc3_trb_dma_offset(struct dwc3_ep *dep, 370f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi struct dwc3_trb *trb) 37172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 372c439ef87c33a1df30f528cb152151465c2529cacPaul Zimmerman u32 offset = (char *) trb - (char *) dep->trb_pool; 37372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 37472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return dep->trb_pool_dma + offset; 37572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 37672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 37772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_alloc_trb_pool(struct dwc3_ep *dep) 37872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 37972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 38072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 38172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->trb_pool) 38272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 38372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 38472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->number == 0 || dep->number == 1) 38572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 38672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 38772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->trb_pool = dma_alloc_coherent(dwc->dev, 38872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi sizeof(struct dwc3_trb) * DWC3_TRB_NUM, 38972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi &dep->trb_pool_dma, GFP_KERNEL); 39072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dep->trb_pool) { 39172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dep->dwc->dev, "failed to allocate trb pool for %s\n", 39272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 39372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -ENOMEM; 39472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 39572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 39672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 39772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 39872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 39972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_free_trb_pool(struct dwc3_ep *dep) 40072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 40172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 40272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 40372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(struct dwc3_trb) * DWC3_TRB_NUM, 40472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->trb_pool, dep->trb_pool_dma); 40572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 40672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->trb_pool = NULL; 40772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->trb_pool_dma = 0; 40872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 40972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 41072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_start_config(struct dwc3 *dwc, struct dwc3_ep *dep) 41172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 41272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 41372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 cmd; 41472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 41572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0x00, sizeof(params)); 41672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 41772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->number != 1) { 41872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd = DWC3_DEPCMD_DEPSTARTCFG; 41972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* XferRscIdx == 0 for ep0 and 2 for the remaining */ 420b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman if (dep->number > 1) { 421b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman if (dwc->start_config_issued) 422b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman return 0; 423b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman dwc->start_config_issued = true; 42472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd |= DWC3_DEPCMD_PARAM(2); 425b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman } 42672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 42772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return dwc3_send_gadget_ep_cmd(dwc, 0, cmd, ¶ms); 42872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 42972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 43072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 43172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 43272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 43372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_set_ep_config(struct dwc3 *dwc, struct dwc3_ep *dep, 434c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi const struct usb_endpoint_descriptor *desc, 4354b345c9a3c7452340fb477868d8db475f05978b1Felipe Balbi const struct usb_ss_ep_comp_descriptor *comp_desc, 436265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman bool ignore, bool restore) 43772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 43872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 43972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 44072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0x00, sizeof(params)); 44172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 442dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param0 = DWC3_DEPCFG_EP_TYPE(usb_endpoint_type(desc)) 443d2e9a13a388304bc2a7b25a6c34c6e2ab1540a5dChanho Park | DWC3_DEPCFG_MAX_PACKET_SIZE(usb_endpoint_maxp(desc)); 444d2e9a13a388304bc2a7b25a6c34c6e2ab1540a5dChanho Park 445d2e9a13a388304bc2a7b25a6c34c6e2ab1540a5dChanho Park /* Burst size is only needed in SuperSpeed mode */ 446d2e9a13a388304bc2a7b25a6c34c6e2ab1540a5dChanho Park if (dwc->gadget.speed == USB_SPEED_SUPER) { 447d2e9a13a388304bc2a7b25a6c34c6e2ab1540a5dChanho Park u32 burst = dep->endpoint.maxburst - 1; 448d2e9a13a388304bc2a7b25a6c34c6e2ab1540a5dChanho Park 449d2e9a13a388304bc2a7b25a6c34c6e2ab1540a5dChanho Park params.param0 |= DWC3_DEPCFG_BURST_SIZE(burst); 450d2e9a13a388304bc2a7b25a6c34c6e2ab1540a5dChanho Park } 45172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 4524b345c9a3c7452340fb477868d8db475f05978b1Felipe Balbi if (ignore) 4534b345c9a3c7452340fb477868d8db475f05978b1Felipe Balbi params.param0 |= DWC3_DEPCFG_IGN_SEQ_NUM; 4544b345c9a3c7452340fb477868d8db475f05978b1Felipe Balbi 455265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman if (restore) { 456265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman params.param0 |= DWC3_DEPCFG_ACTION_RESTORE; 457265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman params.param2 |= dep->saved_state; 458265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman } 459265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman 460dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param1 = DWC3_DEPCFG_XFER_COMPLETE_EN 461dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi | DWC3_DEPCFG_XFER_NOT_READY_EN; 46272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 46318b7ede5f7ee2092aedcb578d3ac30bd5d4fc23cFelipe Balbi if (usb_ss_max_streams(comp_desc) && usb_endpoint_xfer_bulk(desc)) { 464dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param1 |= DWC3_DEPCFG_STREAM_CAPABLE 465dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi | DWC3_DEPCFG_STREAM_EVENT_EN; 466879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dep->stream_capable = true; 467879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi } 468879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi 46972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (usb_endpoint_xfer_isoc(desc)) 470dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param1 |= DWC3_DEPCFG_XFER_IN_PROGRESS_EN; 47172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 47272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 47372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We are doing 1:1 mapping for endpoints, meaning 47472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Physical Endpoints 2 maps to Logical Endpoint 2 and 47572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * so on. We consider the direction bit as part of the physical 47672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * endpoint number. So USB endpoint 0x81 is 0x03. 47772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 478dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param1 |= DWC3_DEPCFG_EP_NUMBER(dep->number); 47972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 48072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 48172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We must use the lower 16 TX FIFOs even though 48272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * HW might have more 48372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 48472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->direction) 485dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param0 |= DWC3_DEPCFG_FIFO_NUMBER(dep->number >> 1); 48672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 48772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (desc->bInterval) { 488dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param1 |= DWC3_DEPCFG_BINTERVAL_M1(desc->bInterval - 1); 48972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->interval = 1 << (desc->bInterval - 1); 49072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 49172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 49272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return dwc3_send_gadget_ep_cmd(dwc, dep->number, 49372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEPCMD_SETEPCONFIG, ¶ms); 49472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 49572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 49672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_set_xfer_resource(struct dwc3 *dwc, struct dwc3_ep *dep) 49772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 49872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 49972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 50072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0x00, sizeof(params)); 50172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 502dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param0 = DWC3_DEPXFERCFG_NUM_XFER_RES(1); 50372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 50472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return dwc3_send_gadget_ep_cmd(dwc, dep->number, 50572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEPCMD_SETTRANSFRESOURCE, ¶ms); 50672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 50772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 50872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/** 50972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * __dwc3_gadget_ep_enable - Initializes a HW endpoint 51072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * @dep: endpoint to be initialized 51172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * @desc: USB Endpoint Descriptor 51272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 51372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Caller should take care of locking 51472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 51572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int __dwc3_gadget_ep_enable(struct dwc3_ep *dep, 516c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi const struct usb_endpoint_descriptor *desc, 5174b345c9a3c7452340fb477868d8db475f05978b1Felipe Balbi const struct usb_ss_ep_comp_descriptor *comp_desc, 518265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman bool ignore, bool restore) 51972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 52072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 52172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 52272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret = -ENOMEM; 52372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 524ff62d6b6727360ae73382213bc1ebac6cf5160d7Felipe Balbi dev_vdbg(dwc->dev, "Enabling %s\n", dep->name); 525ff62d6b6727360ae73382213bc1ebac6cf5160d7Felipe Balbi 52672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) { 52772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_gadget_start_config(dwc, dep); 52872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 52972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 53072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 53172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 532265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman ret = dwc3_gadget_set_ep_config(dwc, dep, desc, comp_desc, ignore, 533265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman restore); 53472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 53572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 53672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 53772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) { 538f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi struct dwc3_trb *trb_st_hw; 539f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi struct dwc3_trb *trb_link; 54072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 54172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_gadget_set_xfer_resource(dwc, dep); 54272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 54372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 54472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 54516e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz dep->endpoint.desc = desc; 546c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi dep->comp_desc = comp_desc; 54772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->type = usb_endpoint_type(desc); 54872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags |= DWC3_EP_ENABLED; 54972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 55072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DALEPENA); 55172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg |= DWC3_DALEPENA_EP(dep->number); 55272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DALEPENA, reg); 55372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 55472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!usb_endpoint_xfer_isoc(desc)) 55572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 55672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 55772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(&trb_link, 0, sizeof(trb_link)); 55872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 5591d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman /* Link TRB for ISOC. The HWO bit is never reset */ 56072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trb_st_hw = &dep->trb_pool[0]; 56172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 562f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb_link = &dep->trb_pool[DWC3_TRB_NUM - 1]; 56372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 564f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb_link->bpl = lower_32_bits(dwc3_trb_dma_offset(dep, trb_st_hw)); 565f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb_link->bph = upper_32_bits(dwc3_trb_dma_offset(dep, trb_st_hw)); 566f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb_link->ctrl |= DWC3_TRBCTL_LINK_TRB; 567f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb_link->ctrl |= DWC3_TRB_CTRL_HWO; 56872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 56972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 57072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 57172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 57272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 573b992e6813e257269e9599ca07be8bd52df784bf5Paul Zimmermanstatic void dwc3_stop_active_transfer(struct dwc3 *dwc, u32 epnum, bool force); 574624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewiorstatic void dwc3_remove_requests(struct dwc3 *dwc, struct dwc3_ep *dep) 57572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 57672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req; 57772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 578ea53b8828c50b7a5138a8931c41b2671682c86b5Felipe Balbi if (!list_empty(&dep->req_queued)) { 579b992e6813e257269e9599ca07be8bd52df784bf5Paul Zimmerman dwc3_stop_active_transfer(dwc, dep->number, true); 580624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior 58157911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand /* - giveback all requests to gadget driver */ 5821591633ed6c4c3994944f31ddb59bc072a2ed0caPratyush Anand while (!list_empty(&dep->req_queued)) { 5831591633ed6c4c3994944f31ddb59bc072a2ed0caPratyush Anand req = next_request(&dep->req_queued); 5841591633ed6c4c3994944f31ddb59bc072a2ed0caPratyush Anand 5851591633ed6c4c3994944f31ddb59bc072a2ed0caPratyush Anand dwc3_gadget_giveback(dep, req, -ESHUTDOWN); 5861591633ed6c4c3994944f31ddb59bc072a2ed0caPratyush Anand } 587ea53b8828c50b7a5138a8931c41b2671682c86b5Felipe Balbi } 588ea53b8828c50b7a5138a8931c41b2671682c86b5Felipe Balbi 58972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi while (!list_empty(&dep->request_list)) { 59072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req = next_request(&dep->request_list); 59172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 592624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior dwc3_gadget_giveback(dep, req, -ESHUTDOWN); 59372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 59472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 59572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 59672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/** 59772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * __dwc3_gadget_ep_disable - Disables a HW endpoint 59872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * @dep: the endpoint to disable 59972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 600624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior * This function also removes requests which are currently processed ny the 601624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior * hardware and those which are not yet scheduled. 602624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior * Caller should take care of locking. 60372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 60472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int __dwc3_gadget_ep_disable(struct dwc3_ep *dep) 60572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 60672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 60772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 60872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 609624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior dwc3_remove_requests(dwc, dep); 61072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 61172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DALEPENA); 61272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DALEPENA_EP(dep->number); 61372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DALEPENA, reg); 61472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 615879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dep->stream_capable = false; 616f9c56cdd3905c96c600456203637bd7ec8ec6383Ido Shayevitz dep->endpoint.desc = NULL; 617c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi dep->comp_desc = NULL; 61872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->type = 0; 619879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dep->flags = 0; 62072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 62172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 62272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 62372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 62472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 62572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 62672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep0_enable(struct usb_ep *ep, 62772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct usb_endpoint_descriptor *desc) 62872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 62972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EINVAL; 63072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 63172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 63272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep0_disable(struct usb_ep *ep) 63372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 63472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EINVAL; 63572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 63672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 63772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 63872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 63972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_enable(struct usb_ep *ep, 64072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct usb_endpoint_descriptor *desc) 64172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 64272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 64372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc; 64472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 64572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 64672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 64772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!ep || !desc || desc->bDescriptorType != USB_DT_ENDPOINT) { 64872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi pr_debug("dwc3: invalid parameters\n"); 64972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EINVAL; 65072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 65172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 65272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!desc->wMaxPacketSize) { 65372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi pr_debug("dwc3: missing wMaxPacketSize\n"); 65472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EINVAL; 65572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 65672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 65772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = to_dwc3_ep(ep); 65872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc = dep->dwc; 65972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 660c6f83f386c2f7987a344368e33e55840c12bd38fFelipe Balbi if (dep->flags & DWC3_EP_ENABLED) { 661c6f83f386c2f7987a344368e33e55840c12bd38fFelipe Balbi dev_WARN_ONCE(dwc->dev, true, "%s is already enabled\n", 662c6f83f386c2f7987a344368e33e55840c12bd38fFelipe Balbi dep->name); 663c6f83f386c2f7987a344368e33e55840c12bd38fFelipe Balbi return 0; 664c6f83f386c2f7987a344368e33e55840c12bd38fFelipe Balbi } 665c6f83f386c2f7987a344368e33e55840c12bd38fFelipe Balbi 66672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (usb_endpoint_type(desc)) { 66772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_ENDPOINT_XFER_CONTROL: 66827a78d6a283d6782438f72306746afe4bf44c215Anton Tikhomirov strlcat(dep->name, "-control", sizeof(dep->name)); 66972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 67072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_ENDPOINT_XFER_ISOC: 67127a78d6a283d6782438f72306746afe4bf44c215Anton Tikhomirov strlcat(dep->name, "-isoc", sizeof(dep->name)); 67272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 67372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_ENDPOINT_XFER_BULK: 67427a78d6a283d6782438f72306746afe4bf44c215Anton Tikhomirov strlcat(dep->name, "-bulk", sizeof(dep->name)); 67572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 67672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_ENDPOINT_XFER_INT: 67727a78d6a283d6782438f72306746afe4bf44c215Anton Tikhomirov strlcat(dep->name, "-int", sizeof(dep->name)); 67872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 67972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 68072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "invalid endpoint transfer type\n"); 68172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 68272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 68372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 684265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman ret = __dwc3_gadget_ep_enable(dep, desc, ep->comp_desc, false, false); 68572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 68672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 68772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 68872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 68972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 69072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_disable(struct usb_ep *ep) 69172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 69272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 69372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc; 69472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 69572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 69672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 69772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!ep) { 69872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi pr_debug("dwc3: invalid parameters\n"); 69972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EINVAL; 70072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 70172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 70272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = to_dwc3_ep(ep); 70372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc = dep->dwc; 70472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 70572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) { 70672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_WARN_ONCE(dwc->dev, true, "%s is already disabled\n", 70772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 70872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 70972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 71072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 71172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi snprintf(dep->name, sizeof(dep->name), "ep%d%s", 71272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->number >> 1, 71372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi (dep->number & 1) ? "in" : "out"); 71472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 71572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 71672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = __dwc3_gadget_ep_disable(dep); 71772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 71872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 71972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 72072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 72172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 72272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic struct usb_request *dwc3_gadget_ep_alloc_request(struct usb_ep *ep, 72372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi gfp_t gfp_flags) 72472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 72572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req; 72672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = to_dwc3_ep(ep); 72772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 72872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 72972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req = kzalloc(sizeof(*req), gfp_flags); 73072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!req) { 73172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "not enough memory\n"); 73272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return NULL; 73372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 73472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 73572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->epnum = dep->number; 73672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->dep = dep; 73772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 73872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return &req->request; 73972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 74072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 74172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_ep_free_request(struct usb_ep *ep, 74272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct usb_request *request) 74372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 74472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req = to_dwc3_request(request); 74572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 74672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi kfree(req); 74772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 74872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 749c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi/** 750c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi * dwc3_prepare_one_trb - setup one TRB from one request 751c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi * @dep: endpoint for which this request is prepared 752c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi * @req: dwc3_request pointer 753c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi */ 75468e823e24aea5227eaf20d6435485e733109d113Felipe Balbistatic void dwc3_prepare_one_trb(struct dwc3_ep *dep, 755eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi struct dwc3_request *req, dma_addr_t dma, 756e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand unsigned length, unsigned last, unsigned chain, unsigned node) 757c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi{ 758eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi struct dwc3 *dwc = dep->dwc; 759f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi struct dwc3_trb *trb; 760c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 761eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dev_vdbg(dwc->dev, "%s: req %p dma %08llx length %d%s%s\n", 762eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dep->name, req, (unsigned long long) dma, 763eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi length, last ? " last" : "", 764eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi chain ? " chain" : ""); 765eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi 766c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi /* Skip the LINK-TRB on ISOC */ 767915e202aeeb59e272992a6364c910aaef3073544Pratyush Anand if (((dep->free_slot & DWC3_TRB_MASK) == DWC3_TRB_NUM - 1) && 76816e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz usb_endpoint_xfer_isoc(dep->endpoint.desc)) 769915e202aeeb59e272992a6364c910aaef3073544Pratyush Anand dep->free_slot++; 770915e202aeeb59e272992a6364c910aaef3073544Pratyush Anand 771915e202aeeb59e272992a6364c910aaef3073544Pratyush Anand trb = &dep->trb_pool[dep->free_slot & DWC3_TRB_MASK]; 772c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 773eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (!req->trb) { 774eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dwc3_gadget_move_request_queued(req); 775f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi req->trb = trb; 776f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi req->trb_dma = dwc3_trb_dma_offset(dep, trb); 777e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand req->start_slot = dep->free_slot & DWC3_TRB_MASK; 778eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi } 779c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 780e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand dep->free_slot++; 781e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand 782f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->size = DWC3_TRB_SIZE_LENGTH(length); 783f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->bpl = lower_32_bits(dma); 784f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->bph = upper_32_bits(dma); 785c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 78616e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz switch (usb_endpoint_type(dep->endpoint.desc)) { 787c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi case USB_ENDPOINT_XFER_CONTROL: 788f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->ctrl = DWC3_TRBCTL_CONTROL_SETUP; 789c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi break; 790c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 791c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi case USB_ENDPOINT_XFER_ISOC: 792e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if (!node) 793e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand trb->ctrl = DWC3_TRBCTL_ISOCHRONOUS_FIRST; 794e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand else 795e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand trb->ctrl = DWC3_TRBCTL_ISOCHRONOUS; 796c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi break; 797c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 798c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi case USB_ENDPOINT_XFER_BULK: 799c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi case USB_ENDPOINT_XFER_INT: 800f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->ctrl = DWC3_TRBCTL_NORMAL; 801c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi break; 802c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi default: 803c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi /* 804c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi * This is only possible with faulty memory because we 805c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi * checked it already :) 806c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi */ 807c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi BUG(); 808c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi } 809c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 810f3af36511e60669a2b5644d17378c7ea4e42d8b1Felipe Balbi if (!req->request.no_interrupt && !chain) 811f3af36511e60669a2b5644d17378c7ea4e42d8b1Felipe Balbi trb->ctrl |= DWC3_TRB_CTRL_IOC; 812f3af36511e60669a2b5644d17378c7ea4e42d8b1Felipe Balbi 81316e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if (usb_endpoint_xfer_isoc(dep->endpoint.desc)) { 814f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->ctrl |= DWC3_TRB_CTRL_ISP_IMI; 815f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->ctrl |= DWC3_TRB_CTRL_CSP; 816e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand } else if (last) { 817e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand trb->ctrl |= DWC3_TRB_CTRL_LST; 818f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi } 819c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 820e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if (chain) 821e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand trb->ctrl |= DWC3_TRB_CTRL_CHN; 822e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand 82316e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if (usb_endpoint_xfer_bulk(dep->endpoint.desc) && dep->stream_capable) 824f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->ctrl |= DWC3_TRB_CTRL_SID_SOFN(req->request.stream_id); 825c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 826f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->ctrl |= DWC3_TRB_CTRL_HWO; 827c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi} 828c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 82972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* 83072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * dwc3_prepare_trbs - setup TRBs from requests 83172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * @dep: endpoint for which requests are being prepared 83272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * @starting: true if the endpoint is idle and no requests are queued. 83372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 8341d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * The function goes through the requests list and sets up TRBs for the 8351d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * transfers. The function returns once there are no more TRBs available or 8361d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * it runs out of requests. 83772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 83868e823e24aea5227eaf20d6435485e733109d113Felipe Balbistatic void dwc3_prepare_trbs(struct dwc3_ep *dep, bool starting) 83972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 84068e823e24aea5227eaf20d6435485e733109d113Felipe Balbi struct dwc3_request *req, *n; 84172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 trbs_left; 8428d62cd65d74d0e241b3a152f7347bb66126b705bPaul Zimmerman u32 max; 843c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi unsigned int last_one = 0; 84472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 84572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi BUILD_BUG_ON_NOT_POWER_OF_2(DWC3_TRB_NUM); 84672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 84772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* the first request must not be queued */ 84872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trbs_left = (dep->busy_slot - dep->free_slot) & DWC3_TRB_MASK; 849c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 8508d62cd65d74d0e241b3a152f7347bb66126b705bPaul Zimmerman /* Can't wrap around on a non-isoc EP since there's no link TRB */ 85116e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if (!usb_endpoint_xfer_isoc(dep->endpoint.desc)) { 8528d62cd65d74d0e241b3a152f7347bb66126b705bPaul Zimmerman max = DWC3_TRB_NUM - (dep->free_slot & DWC3_TRB_MASK); 8538d62cd65d74d0e241b3a152f7347bb66126b705bPaul Zimmerman if (trbs_left > max) 8548d62cd65d74d0e241b3a152f7347bb66126b705bPaul Zimmerman trbs_left = max; 8558d62cd65d74d0e241b3a152f7347bb66126b705bPaul Zimmerman } 8568d62cd65d74d0e241b3a152f7347bb66126b705bPaul Zimmerman 85772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 8581d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * If busy & slot are equal than it is either full or empty. If we are 8591d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * starting to process requests then we are empty. Otherwise we are 86072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * full and don't do anything 86172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 86272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!trbs_left) { 86372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!starting) 86468e823e24aea5227eaf20d6435485e733109d113Felipe Balbi return; 86572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trbs_left = DWC3_TRB_NUM; 86672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 86772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * In case we start from scratch, we queue the ISOC requests 86872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * starting from slot 1. This is done because we use ring 86972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * buffer and have no LST bit to stop us. Instead, we place 8701d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * IOC bit every TRB_NUM/4. We try to avoid having an interrupt 87172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * after the first request so we start at slot 1 and have 87272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 7 requests proceed before we hit the first IOC. 87372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Other transfer types don't use the ring buffer and are 87472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * processed from the first TRB until the last one. Since we 87572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * don't wrap around we have to start at the beginning. 87672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 87716e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if (usb_endpoint_xfer_isoc(dep->endpoint.desc)) { 87872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->busy_slot = 1; 87972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->free_slot = 1; 88072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 88172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->busy_slot = 0; 88272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->free_slot = 0; 88372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 88472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 88572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 88672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* The last TRB is a link TRB, not used for xfer */ 88716e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if ((trbs_left <= 1) && usb_endpoint_xfer_isoc(dep->endpoint.desc)) 88868e823e24aea5227eaf20d6435485e733109d113Felipe Balbi return; 88972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 89072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_for_each_entry_safe(req, n, &dep->request_list, list) { 891eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi unsigned length; 892eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dma_addr_t dma; 893e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand last_one = false; 89472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 895eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (req->request.num_mapped_sgs > 0) { 896eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi struct usb_request *request = &req->request; 897eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi struct scatterlist *sg = request->sg; 898eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi struct scatterlist *s; 899eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi int i; 90072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 901eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi for_each_sg(sg, s, request->num_mapped_sgs, i) { 902eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi unsigned chain = true; 90372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 904eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi length = sg_dma_len(s); 905eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dma = sg_dma_address(s); 90672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 9071d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman if (i == (request->num_mapped_sgs - 1) || 9081d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman sg_is_last(s)) { 909e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if (list_is_last(&req->list, 910e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand &dep->request_list)) 911e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand last_one = true; 912eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi chain = false; 913eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi } 91472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 915eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi trbs_left--; 916eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (!trbs_left) 917eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi last_one = true; 91872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 919eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (last_one) 920eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi chain = false; 92172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 922eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dwc3_prepare_one_trb(dep, req, dma, length, 923e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand last_one, chain, i); 92472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 925eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (last_one) 926eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi break; 927eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi } 92872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 929eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dma = req->request.dma; 930eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi length = req->request.length; 931eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi trbs_left--; 93272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 933eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (!trbs_left) 934eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi last_one = 1; 935879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi 936eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi /* Is this the last request? */ 937eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (list_is_last(&req->list, &dep->request_list)) 938eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi last_one = 1; 93972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 940eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dwc3_prepare_one_trb(dep, req, dma, length, 941e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand last_one, false, 0); 94272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 943eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (last_one) 944eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi break; 94572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 94672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 94772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 94872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 94972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int __dwc3_gadget_kick_transfer(struct dwc3_ep *dep, u16 cmd_param, 95072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int start_new) 95172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 95272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 95372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req; 95472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 95572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 95672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 cmd; 95772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 95872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (start_new && (dep->flags & DWC3_EP_BUSY)) { 95972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s: endpoint busy\n", dep->name); 96072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EBUSY; 96172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 96272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags &= ~DWC3_EP_PENDING_REQUEST; 96372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 96472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 96572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * If we are getting here after a short-out-packet we don't enqueue any 96672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * new requests as we try to set the IOC bit only on the last request. 96772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 96872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (start_new) { 96972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (list_empty(&dep->req_queued)) 97072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_prepare_trbs(dep, start_new); 97172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 97272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* req points to the first request which will be sent */ 97372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req = next_request(&dep->req_queued); 97472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 97568e823e24aea5227eaf20d6435485e733109d113Felipe Balbi dwc3_prepare_trbs(dep, start_new); 97668e823e24aea5227eaf20d6435485e733109d113Felipe Balbi 97772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 9781d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * req points to the first request where HWO changed from 0 to 1 97972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 98068e823e24aea5227eaf20d6435485e733109d113Felipe Balbi req = next_request(&dep->req_queued); 98172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 98272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!req) { 98372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags |= DWC3_EP_PENDING_REQUEST; 98472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 98572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 98672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 98772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0, sizeof(params)); 98872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 9891877d6c9a57802d50a059cf2dacdba10168cece7Pratyush Anand if (start_new) { 9901877d6c9a57802d50a059cf2dacdba10168cece7Pratyush Anand params.param0 = upper_32_bits(req->trb_dma); 9911877d6c9a57802d50a059cf2dacdba10168cece7Pratyush Anand params.param1 = lower_32_bits(req->trb_dma); 99272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd = DWC3_DEPCMD_STARTTRANSFER; 9931877d6c9a57802d50a059cf2dacdba10168cece7Pratyush Anand } else { 99472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd = DWC3_DEPCMD_UPDATETRANSFER; 9951877d6c9a57802d50a059cf2dacdba10168cece7Pratyush Anand } 99672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 99772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd |= DWC3_DEPCMD_PARAM(cmd_param); 99872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, cmd, ¶ms); 99972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret < 0) { 100072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "failed to send STARTTRANSFER command\n"); 100172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 100272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 100372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * FIXME we need to iterate over the list of requests 100472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * here and stop, unmap, free and del each of the linked 10051d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * requests instead of what we do now. 100672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 10070fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi usb_gadget_unmap_request(&dwc->gadget, &req->request, 10080fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi req->direction); 100972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_del(&req->list); 101072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 101172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 101272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 101372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags |= DWC3_EP_BUSY; 101425b8ff68bf1d4954d4a9dcb4862c6b6a53cb09e2Felipe Balbi 1015f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman if (start_new) { 1016b4996a8631e80a2aaddb5c487ff6b9ad37315f70Felipe Balbi dep->resource_index = dwc3_gadget_ep_get_transfer_index(dwc, 1017f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman dep->number); 1018b4996a8631e80a2aaddb5c487ff6b9ad37315f70Felipe Balbi WARN_ON_ONCE(!dep->resource_index); 1019f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman } 102025b8ff68bf1d4954d4a9dcb4862c6b6a53cb09e2Felipe Balbi 102172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 102272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 102372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1024d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anandstatic void __dwc3_gadget_start_isoc(struct dwc3 *dwc, 1025d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand struct dwc3_ep *dep, u32 cur_uf) 1026d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand{ 1027d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand u32 uf; 1028d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand 1029d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand if (list_empty(&dep->request_list)) { 1030d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand dev_vdbg(dwc->dev, "ISOC ep %s run out for requests.\n", 1031d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand dep->name); 1032f4a53c55117b82e895ec98b1765c9d66940377fcPratyush Anand dep->flags |= DWC3_EP_PENDING_REQUEST; 1033d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand return; 1034d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand } 1035d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand 1036d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand /* 4 micro frames in the future */ 1037d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand uf = cur_uf + dep->interval * 4; 1038d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand 1039d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand __dwc3_gadget_kick_transfer(dep, uf, 1); 1040d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand} 1041d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand 1042d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anandstatic void dwc3_gadget_start_isoc(struct dwc3 *dwc, 1043d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand struct dwc3_ep *dep, const struct dwc3_event_depevt *event) 1044d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand{ 1045d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand u32 cur_uf, mask; 1046d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand 1047d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand mask = ~(dep->interval - 1); 1048d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand cur_uf = event->parameters & mask; 1049d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand 1050d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand __dwc3_gadget_start_isoc(dwc, dep, cur_uf); 1051d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand} 1052d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand 105372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int __dwc3_gadget_ep_queue(struct dwc3_ep *dep, struct dwc3_request *req) 105472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 10550fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi struct dwc3 *dwc = dep->dwc; 10560fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi int ret; 10570fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi 105872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.actual = 0; 105972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.status = -EINPROGRESS; 106072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->direction = dep->direction; 106172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->epnum = dep->number; 106272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 106372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 106472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We only add to our list of requests now and 106572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * start consuming the list once we get XferNotReady 106672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * IRQ. 106772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 106872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * That way, we avoid doing anything that we don't need 106972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * to do now and defer it until the point we receive a 107072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * particular token from the Host side. 107172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 107272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * This will also avoid Host cancelling URBs due to too 10731d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * many NAKs. 107472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 10750fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi ret = usb_gadget_map_request(&dwc->gadget, &req->request, 10760fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi dep->direction); 10770fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi if (ret) 10780fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi return ret; 10790fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi 108072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_add_tail(&req->list, &dep->request_list); 108172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 108272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 1083b511e5e76bf488cd3eec1048483a3898393a4dcaFelipe Balbi * There are a few special cases: 108472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 1085f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman * 1. XferNotReady with empty list of requests. We need to kick the 1086f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman * transfer here in that situation, otherwise we will be NAKing 1087f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman * forever. If we get XferNotReady before gadget driver has a 1088f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman * chance to queue a request, we will ACK the IRQ but won't be 1089f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman * able to receive the data until the next request is queued. 1090f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman * The following code is handling exactly that. 109172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 109272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 109372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->flags & DWC3_EP_PENDING_REQUEST) { 1094f4a53c55117b82e895ec98b1765c9d66940377fcPratyush Anand /* 1095f4a53c55117b82e895ec98b1765c9d66940377fcPratyush Anand * If xfernotready is already elapsed and it is a case 1096f4a53c55117b82e895ec98b1765c9d66940377fcPratyush Anand * of isoc transfer, then issue END TRANSFER, so that 1097f4a53c55117b82e895ec98b1765c9d66940377fcPratyush Anand * you can receive xfernotready again and can have 1098f4a53c55117b82e895ec98b1765c9d66940377fcPratyush Anand * notion of current microframe. 1099f4a53c55117b82e895ec98b1765c9d66940377fcPratyush Anand */ 1100f4a53c55117b82e895ec98b1765c9d66940377fcPratyush Anand if (usb_endpoint_xfer_isoc(dep->endpoint.desc)) { 1101cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand if (list_empty(&dep->req_queued)) { 1102b992e6813e257269e9599ca07be8bd52df784bf5Paul Zimmerman dwc3_stop_active_transfer(dwc, dep->number, true); 1103cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand dep->flags = DWC3_EP_ENABLED; 1104cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand } 1105f4a53c55117b82e895ec98b1765c9d66940377fcPratyush Anand return 0; 1106f4a53c55117b82e895ec98b1765c9d66940377fcPratyush Anand } 1107f4a53c55117b82e895ec98b1765c9d66940377fcPratyush Anand 1108b511e5e76bf488cd3eec1048483a3898393a4dcaFelipe Balbi ret = __dwc3_gadget_kick_transfer(dep, 0, true); 1109348e026fafe2501281db5fb7fed599b337cad358Moiz Sonasath if (ret && ret != -EBUSY) 1110b511e5e76bf488cd3eec1048483a3898393a4dcaFelipe Balbi dev_dbg(dwc->dev, "%s: failed to kick transfers\n", 1111b511e5e76bf488cd3eec1048483a3898393a4dcaFelipe Balbi dep->name); 111215f86bde29f0fdfb877d9c753547fa2e2f5ef1fePratyush Anand return ret; 1113b511e5e76bf488cd3eec1048483a3898393a4dcaFelipe Balbi } 111472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1115b511e5e76bf488cd3eec1048483a3898393a4dcaFelipe Balbi /* 1116b511e5e76bf488cd3eec1048483a3898393a4dcaFelipe Balbi * 2. XferInProgress on Isoc EP with an active transfer. We need to 1117b511e5e76bf488cd3eec1048483a3898393a4dcaFelipe Balbi * kick the transfer here after queuing a request, otherwise the 1118b511e5e76bf488cd3eec1048483a3898393a4dcaFelipe Balbi * core may not see the modified TRB(s). 1119b511e5e76bf488cd3eec1048483a3898393a4dcaFelipe Balbi */ 1120b511e5e76bf488cd3eec1048483a3898393a4dcaFelipe Balbi if (usb_endpoint_xfer_isoc(dep->endpoint.desc) && 112179c9046ec52b5aaa9f055e3d928d676dd37a6f9dPratyush Anand (dep->flags & DWC3_EP_BUSY) && 112279c9046ec52b5aaa9f055e3d928d676dd37a6f9dPratyush Anand !(dep->flags & DWC3_EP_MISSED_ISOC)) { 1123b4996a8631e80a2aaddb5c487ff6b9ad37315f70Felipe Balbi WARN_ON_ONCE(!dep->resource_index); 1124b4996a8631e80a2aaddb5c487ff6b9ad37315f70Felipe Balbi ret = __dwc3_gadget_kick_transfer(dep, dep->resource_index, 1125b511e5e76bf488cd3eec1048483a3898393a4dcaFelipe Balbi false); 1126348e026fafe2501281db5fb7fed599b337cad358Moiz Sonasath if (ret && ret != -EBUSY) 112772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "%s: failed to kick transfers\n", 112872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 112915f86bde29f0fdfb877d9c753547fa2e2f5ef1fePratyush Anand return ret; 1130a092532483e3200a53c8b1170b3988cc668c07efFelipe Balbi } 113172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1132b997ada5db905e24494bcc689c7b2c07d278ca27Felipe Balbi /* 1133b997ada5db905e24494bcc689c7b2c07d278ca27Felipe Balbi * 4. Stream Capable Bulk Endpoints. We need to start the transfer 1134b997ada5db905e24494bcc689c7b2c07d278ca27Felipe Balbi * right away, otherwise host will not know we have streams to be 1135b997ada5db905e24494bcc689c7b2c07d278ca27Felipe Balbi * handled. 1136b997ada5db905e24494bcc689c7b2c07d278ca27Felipe Balbi */ 1137b997ada5db905e24494bcc689c7b2c07d278ca27Felipe Balbi if (dep->stream_capable) { 1138b997ada5db905e24494bcc689c7b2c07d278ca27Felipe Balbi int ret; 1139b997ada5db905e24494bcc689c7b2c07d278ca27Felipe Balbi 1140b997ada5db905e24494bcc689c7b2c07d278ca27Felipe Balbi ret = __dwc3_gadget_kick_transfer(dep, 0, true); 1141b997ada5db905e24494bcc689c7b2c07d278ca27Felipe Balbi if (ret && ret != -EBUSY) { 1142b997ada5db905e24494bcc689c7b2c07d278ca27Felipe Balbi struct dwc3 *dwc = dep->dwc; 1143b997ada5db905e24494bcc689c7b2c07d278ca27Felipe Balbi 1144b997ada5db905e24494bcc689c7b2c07d278ca27Felipe Balbi dev_dbg(dwc->dev, "%s: failed to kick transfers\n", 1145b997ada5db905e24494bcc689c7b2c07d278ca27Felipe Balbi dep->name); 1146b997ada5db905e24494bcc689c7b2c07d278ca27Felipe Balbi } 1147b997ada5db905e24494bcc689c7b2c07d278ca27Felipe Balbi } 1148b997ada5db905e24494bcc689c7b2c07d278ca27Felipe Balbi 114972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 115072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 115172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 115272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_queue(struct usb_ep *ep, struct usb_request *request, 115372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi gfp_t gfp_flags) 115472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 115572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req = to_dwc3_request(request); 115672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = to_dwc3_ep(ep); 115772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 115872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 115972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 116072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 116172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 116272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 116316e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if (!dep->endpoint.desc) { 116472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "trying to queue request %p to disabled %s\n", 116572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi request, ep->name); 116672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -ESHUTDOWN; 116772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 116872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 116972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "queing request %p to %s length %d\n", 117072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi request, ep->name, request->length); 117172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 117272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 117372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = __dwc3_gadget_ep_queue(dep, req); 117472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 117572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 117672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 117772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 117872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 117972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_dequeue(struct usb_ep *ep, 118072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct usb_request *request) 118172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 118272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req = to_dwc3_request(request); 118372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *r = NULL; 118472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 118572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = to_dwc3_ep(ep); 118672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 118772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 118872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 118972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret = 0; 119072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 119172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 119272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 119372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_for_each_entry(r, &dep->request_list, list) { 119472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (r == req) 119572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 119672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 119772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 119872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (r != req) { 119972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_for_each_entry(r, &dep->req_queued, list) { 120072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (r == req) 120172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 120272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 120372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (r == req) { 120472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* wait until it is processed */ 1205b992e6813e257269e9599ca07be8bd52df784bf5Paul Zimmerman dwc3_stop_active_transfer(dwc, dep->number, true); 1206e8d4e8be860d935099ffcf695dcd29b55ae50b36Pratyush Anand goto out1; 120772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 120872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "request %p was not queued to %s\n", 120972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi request, ep->name); 121072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EINVAL; 121172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto out0; 121272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 121372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1214e8d4e8be860d935099ffcf695dcd29b55ae50b36Pratyush Anandout1: 121572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* giveback the request */ 121672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_giveback(dep, req, -ECONNRESET); 121772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 121872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiout0: 121972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 122072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 122172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 122272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 122372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 122472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiint __dwc3_gadget_ep_set_halt(struct dwc3_ep *dep, int value) 122572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 122672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 122772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 122872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 122972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 123072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0x00, sizeof(params)); 123172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 123272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (value) { 123372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, 123472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEPCMD_SETSTALL, ¶ms); 123572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 123672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to %s STALL on %s\n", 123772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi value ? "set" : "clear", 123872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 123972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi else 124072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags |= DWC3_EP_STALL; 124172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 124272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, 124372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEPCMD_CLEARSTALL, ¶ms); 124472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 124572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to %s STALL on %s\n", 124672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi value ? "set" : "clear", 124772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 124872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi else 1249a535d81c92615b8ffb99b7e1fd1fb01effaed1afAlan Stern dep->flags &= ~(DWC3_EP_STALL | DWC3_EP_WEDGE); 125072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 12515275455a6e6ae6b57303834b0afd267bb9657ffcPaul Zimmerman 125272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 125372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 125472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 125572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_set_halt(struct usb_ep *ep, int value) 125672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 125772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = to_dwc3_ep(ep); 125872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 125972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 126072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 126172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 126272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 126372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 126472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 126572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 126616e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if (usb_endpoint_xfer_isoc(dep->endpoint.desc)) { 126772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "%s is of Isochronous type\n", dep->name); 126872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EINVAL; 126972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto out; 127072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 127172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 127272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = __dwc3_gadget_ep_set_halt(dep, value); 127372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiout: 127472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 127572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 127672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 127772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 127872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 127972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_set_wedge(struct usb_ep *ep) 128072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 128172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = to_dwc3_ep(ep); 1282249a456930cd2df29d085fb738b0e8f4bc1680cfPaul Zimmerman struct dwc3 *dwc = dep->dwc; 1283249a456930cd2df29d085fb738b0e8f4bc1680cfPaul Zimmerman unsigned long flags; 128472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1285249a456930cd2df29d085fb738b0e8f4bc1680cfPaul Zimmerman spin_lock_irqsave(&dwc->lock, flags); 128672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags |= DWC3_EP_WEDGE; 1287249a456930cd2df29d085fb738b0e8f4bc1680cfPaul Zimmerman spin_unlock_irqrestore(&dwc->lock, flags); 128872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 128908f0d96670c53898b4154e7945e77cdd966003f7Pratyush Anand if (dep->number == 0 || dep->number == 1) 129008f0d96670c53898b4154e7945e77cdd966003f7Pratyush Anand return dwc3_gadget_ep0_set_halt(ep, 1); 129108f0d96670c53898b4154e7945e77cdd966003f7Pratyush Anand else 129208f0d96670c53898b4154e7945e77cdd966003f7Pratyush Anand return dwc3_gadget_ep_set_halt(ep, 1); 129372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 129472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 129572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 129672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 129772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic struct usb_endpoint_descriptor dwc3_gadget_ep0_desc = { 129872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .bLength = USB_DT_ENDPOINT_SIZE, 129972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .bDescriptorType = USB_DT_ENDPOINT, 130072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .bmAttributes = USB_ENDPOINT_XFER_CONTROL, 130172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi}; 130272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 130372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic const struct usb_ep_ops dwc3_gadget_ep0_ops = { 130472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .enable = dwc3_gadget_ep0_enable, 130572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .disable = dwc3_gadget_ep0_disable, 130672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .alloc_request = dwc3_gadget_ep_alloc_request, 130772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .free_request = dwc3_gadget_ep_free_request, 130872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .queue = dwc3_gadget_ep0_queue, 130972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .dequeue = dwc3_gadget_ep_dequeue, 131008f0d96670c53898b4154e7945e77cdd966003f7Pratyush Anand .set_halt = dwc3_gadget_ep0_set_halt, 131172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .set_wedge = dwc3_gadget_ep_set_wedge, 131272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi}; 131372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 131472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic const struct usb_ep_ops dwc3_gadget_ep_ops = { 131572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .enable = dwc3_gadget_ep_enable, 131672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .disable = dwc3_gadget_ep_disable, 131772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .alloc_request = dwc3_gadget_ep_alloc_request, 131872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .free_request = dwc3_gadget_ep_free_request, 131972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .queue = dwc3_gadget_ep_queue, 132072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .dequeue = dwc3_gadget_ep_dequeue, 132172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .set_halt = dwc3_gadget_ep_set_halt, 132272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .set_wedge = dwc3_gadget_ep_set_wedge, 132372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi}; 132472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 132572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 132672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 132772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_get_frame(struct usb_gadget *g) 132872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 132972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 133072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 133172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 133272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 133372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return DWC3_DSTS_SOFFN(reg); 133472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 133572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 133672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_wakeup(struct usb_gadget *g) 133772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 133872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 133972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 134072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long timeout; 134172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 134272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 134372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 134472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 134572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret = 0; 134672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 134772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 link_state; 134872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 speed; 134972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 135072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 135172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 135272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 135372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * According to the Databook Remote wakeup request should 135472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * be issued only when the device is in early suspend state. 135572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 135672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We can check that via USB Link State bits in DSTS register. 135772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 135872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 135972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 136072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi speed = reg & DWC3_DSTS_CONNECTSPD; 136172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (speed == DWC3_DSTS_SUPERSPEED) { 136272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "no wakeup on SuperSpeed\n"); 136372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EINVAL; 136472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto out; 136572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 136672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 136772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi link_state = DWC3_DSTS_USBLNKST(reg); 136872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 136972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (link_state) { 137072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_LINK_STATE_RX_DET: /* in HS, means Early Suspend */ 137172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_LINK_STATE_U3: /* in HS, means SUSPEND */ 137272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 137372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 137472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "can't wakeup from link state %d\n", 137572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi link_state); 137672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EINVAL; 137772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto out; 137872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 137972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 13808598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi ret = dwc3_gadget_set_link_state(dwc, DWC3_LINK_STATE_RECOV); 13818598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi if (ret < 0) { 13828598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi dev_err(dwc->dev, "failed to put link in Recovery\n"); 13838598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi goto out; 13848598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi } 138572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1386802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman /* Recent versions do this automatically */ 1387802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman if (dwc->revision < DWC3_REVISION_194A) { 1388802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman /* write zeroes to Link Change Request */ 1389fcc023c726b5879d8f3f0f0f48c45d09055272c4Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 1390802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman reg &= ~DWC3_DCTL_ULSTCHNGREQ_MASK; 1391802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman dwc3_writel(dwc->regs, DWC3_DCTL, reg); 1392802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman } 139372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 13941d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman /* poll until Link State changes to ON */ 139572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi timeout = jiffies + msecs_to_jiffies(100); 139672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 13971d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman while (!time_after(jiffies, timeout)) { 139872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 139972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 140072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* in HS, means ON */ 140172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (DWC3_DSTS_USBLNKST(reg) == DWC3_LINK_STATE_U0) 140272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 140372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 140472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 140572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (DWC3_DSTS_USBLNKST(reg) != DWC3_LINK_STATE_U0) { 140672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to send remote wakeup\n"); 140772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EINVAL; 140872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 140972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 141072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiout: 141172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 141272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 141372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 141472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 141572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 141672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_set_selfpowered(struct usb_gadget *g, 141772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int is_selfpowered) 141872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 141972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 1420249a456930cd2df29d085fb738b0e8f4bc1680cfPaul Zimmerman unsigned long flags; 142172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1422249a456930cd2df29d085fb738b0e8f4bc1680cfPaul Zimmerman spin_lock_irqsave(&dwc->lock, flags); 142372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->is_selfpowered = !!is_selfpowered; 1424249a456930cd2df29d085fb738b0e8f4bc1680cfPaul Zimmerman spin_unlock_irqrestore(&dwc->lock, flags); 142572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 142672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 142772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 142872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 14297b2a0368bbc9bc4a7936d8587eaff4b8c35b2247Felipe Balbistatic int dwc3_gadget_run_stop(struct dwc3 *dwc, int is_on, int suspend) 143072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 143172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 143261d58242f634642de42d6a4098913b7254a65053Sebastian Andrzej Siewior u32 timeout = 500; 143372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 143472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 14358db7ed15f2557e26371e4b2d98fee290d992b715Felipe Balbi if (is_on) { 1436802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman if (dwc->revision <= DWC3_REVISION_187A) { 1437802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman reg &= ~DWC3_DCTL_TRGTULST_MASK; 1438802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman reg |= DWC3_DCTL_TRGTULST_RX_DET; 1439802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman } 1440802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman 1441802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman if (dwc->revision >= DWC3_REVISION_194A) 1442802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman reg &= ~DWC3_DCTL_KEEP_CONNECT; 1443802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman reg |= DWC3_DCTL_RUN_STOP; 14447b2a0368bbc9bc4a7936d8587eaff4b8c35b2247Felipe Balbi 14457b2a0368bbc9bc4a7936d8587eaff4b8c35b2247Felipe Balbi if (dwc->has_hibernation) 14467b2a0368bbc9bc4a7936d8587eaff4b8c35b2247Felipe Balbi reg |= DWC3_DCTL_KEEP_CONNECT; 14477b2a0368bbc9bc4a7936d8587eaff4b8c35b2247Felipe Balbi 14489fcb3bd8d12db29c101d3722d37ddef9d1915317Felipe Balbi dwc->pullups_connected = true; 14498db7ed15f2557e26371e4b2d98fee290d992b715Felipe Balbi } else { 145072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DCTL_RUN_STOP; 14517b2a0368bbc9bc4a7936d8587eaff4b8c35b2247Felipe Balbi 14527b2a0368bbc9bc4a7936d8587eaff4b8c35b2247Felipe Balbi if (dwc->has_hibernation && !suspend) 14537b2a0368bbc9bc4a7936d8587eaff4b8c35b2247Felipe Balbi reg &= ~DWC3_DCTL_KEEP_CONNECT; 14547b2a0368bbc9bc4a7936d8587eaff4b8c35b2247Felipe Balbi 14559fcb3bd8d12db29c101d3722d37ddef9d1915317Felipe Balbi dwc->pullups_connected = false; 14568db7ed15f2557e26371e4b2d98fee290d992b715Felipe Balbi } 145772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 145872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 145972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 146072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi do { 146172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 146272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (is_on) { 146372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(reg & DWC3_DSTS_DEVCTRLHLT)) 146472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 146572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 146672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (reg & DWC3_DSTS_DEVCTRLHLT) 146772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 146872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 146972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi timeout--; 147072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!timeout) 14716f17f74b3d8345663f5fcfd834145685110075bdPratyush Anand return -ETIMEDOUT; 147261d58242f634642de42d6a4098913b7254a65053Sebastian Andrzej Siewior udelay(1); 147372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } while (1); 147472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 147572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "gadget %s data soft-%s\n", 147672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver 147772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ? dwc->gadget_driver->function : "no-function", 147872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi is_on ? "connect" : "disconnect"); 14796f17f74b3d8345663f5fcfd834145685110075bdPratyush Anand 14806f17f74b3d8345663f5fcfd834145685110075bdPratyush Anand return 0; 148172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 148272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 148372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_pullup(struct usb_gadget *g, int is_on) 148472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 148572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 148672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 14876f17f74b3d8345663f5fcfd834145685110075bdPratyush Anand int ret; 148872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 148972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi is_on = !!is_on; 149072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 149172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 14927b2a0368bbc9bc4a7936d8587eaff4b8c35b2247Felipe Balbi ret = dwc3_gadget_run_stop(dwc, is_on, false); 149372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 149472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 14956f17f74b3d8345663f5fcfd834145685110075bdPratyush Anand return ret; 149672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 149772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 14988698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbistatic void dwc3_gadget_enable_irq(struct dwc3 *dwc) 14998698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi{ 15008698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi u32 reg; 15018698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi 15028698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi /* Enable all but Start and End of Frame IRQs */ 15038698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi reg = (DWC3_DEVTEN_VNDRDEVTSTRCVEDEN | 15048698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi DWC3_DEVTEN_EVNTOVERFLOWEN | 15058698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi DWC3_DEVTEN_CMDCMPLTEN | 15068698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi DWC3_DEVTEN_ERRTICERREN | 15078698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi DWC3_DEVTEN_WKUPEVTEN | 15088698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi DWC3_DEVTEN_ULSTCNGEN | 15098698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi DWC3_DEVTEN_CONNECTDONEEN | 15108698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi DWC3_DEVTEN_USBRSTEN | 15118698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi DWC3_DEVTEN_DISCONNEVTEN); 15128698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi 15138698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEVTEN, reg); 15148698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi} 15158698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi 15168698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbistatic void dwc3_gadget_disable_irq(struct dwc3 *dwc) 15178698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi{ 15188698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi /* mask all interrupts */ 15198698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEVTEN, 0x00); 15208698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi} 15218698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi 15228698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbistatic irqreturn_t dwc3_interrupt(int irq, void *_dwc); 1523b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbistatic irqreturn_t dwc3_thread_interrupt(int irq, void *_dwc); 15248698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi 152572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_start(struct usb_gadget *g, 152672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct usb_gadget_driver *driver) 152772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 152872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 152972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 153072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 153172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret = 0; 15328698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi int irq; 153372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 153472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1535b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi irq = platform_get_irq(to_platform_device(dwc->dev), 0); 1536b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi ret = request_threaded_irq(irq, dwc3_interrupt, dwc3_thread_interrupt, 1537e8adfc30ff9282a728fd8b666b6418308164c415Felipe Balbi IRQF_SHARED, "dwc3", dwc); 1538b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi if (ret) { 1539b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi dev_err(dwc->dev, "failed to request irq #%d --> %d\n", 1540b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi irq, ret); 1541b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi goto err0; 1542b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi } 1543b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi 154472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 154572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 154672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dwc->gadget_driver) { 154772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "%s is already bound to %s\n", 154872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.name, 154972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver->driver.name); 155072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EBUSY; 1551b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi goto err1; 155272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 155372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 155472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver = driver; 155572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 155672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCFG); 155772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~(DWC3_DCFG_SPEED_MASK); 155807e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi 155907e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi /** 156007e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * WORKAROUND: DWC3 revision < 2.20a have an issue 156107e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * which would cause metastability state on Run/Stop 156207e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * bit if we try to force the IP to USB2-only mode. 156307e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * 156407e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * Because of that, we cannot configure the IP to any 156507e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * speed other than the SuperSpeed 156607e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * 156707e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * Refers to: 156807e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * 156907e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * STAR#9000525659: Clock Domain Crossing on DCTL in 157007e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * USB 2.0 Mode 157107e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi */ 1572f7e846f0956917888b28b52726ee8779a39d84b6Felipe Balbi if (dwc->revision < DWC3_REVISION_220A) { 157307e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi reg |= DWC3_DCFG_SUPERSPEED; 1574f7e846f0956917888b28b52726ee8779a39d84b6Felipe Balbi } else { 1575f7e846f0956917888b28b52726ee8779a39d84b6Felipe Balbi switch (dwc->maximum_speed) { 1576f7e846f0956917888b28b52726ee8779a39d84b6Felipe Balbi case USB_SPEED_LOW: 1577f7e846f0956917888b28b52726ee8779a39d84b6Felipe Balbi reg |= DWC3_DSTS_LOWSPEED; 1578f7e846f0956917888b28b52726ee8779a39d84b6Felipe Balbi break; 1579f7e846f0956917888b28b52726ee8779a39d84b6Felipe Balbi case USB_SPEED_FULL: 1580f7e846f0956917888b28b52726ee8779a39d84b6Felipe Balbi reg |= DWC3_DSTS_FULLSPEED1; 1581f7e846f0956917888b28b52726ee8779a39d84b6Felipe Balbi break; 1582f7e846f0956917888b28b52726ee8779a39d84b6Felipe Balbi case USB_SPEED_HIGH: 1583f7e846f0956917888b28b52726ee8779a39d84b6Felipe Balbi reg |= DWC3_DSTS_HIGHSPEED; 1584f7e846f0956917888b28b52726ee8779a39d84b6Felipe Balbi break; 1585f7e846f0956917888b28b52726ee8779a39d84b6Felipe Balbi case USB_SPEED_SUPER: /* FALLTHROUGH */ 1586f7e846f0956917888b28b52726ee8779a39d84b6Felipe Balbi case USB_SPEED_UNKNOWN: /* FALTHROUGH */ 1587f7e846f0956917888b28b52726ee8779a39d84b6Felipe Balbi default: 1588f7e846f0956917888b28b52726ee8779a39d84b6Felipe Balbi reg |= DWC3_DSTS_SUPERSPEED; 1589f7e846f0956917888b28b52726ee8779a39d84b6Felipe Balbi } 1590f7e846f0956917888b28b52726ee8779a39d84b6Felipe Balbi } 159172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCFG, reg); 159272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1593b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman dwc->start_config_issued = false; 1594b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman 159572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* Start with SuperSpeed Default */ 159672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(512); 159772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 159872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[0]; 1599265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL, false, 1600265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman false); 160172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 160272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to enable %s\n", dep->name); 1603b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi goto err2; 160472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 160572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 160672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[1]; 1607265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL, false, 1608265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman false); 160972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 161072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to enable %s\n", dep->name); 1611b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi goto err3; 161272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 161372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 161472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* begin to receive SETUP packets */ 1615c7fcdeb2627c46b7ec3f0bcb2054b10405f9a70eFelipe Balbi dwc->ep0state = EP0_SETUP_PHASE; 161672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_ep0_out_start(dwc); 161772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 16188698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi dwc3_gadget_enable_irq(dwc); 16198698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi 162072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 162172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 162272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 162372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1624b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbierr3: 162572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi __dwc3_gadget_ep_disable(dwc->eps[0]); 162672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1627b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbierr2: 1628cdcedd6981194e511cc206887db661d016069d68Felipe Balbi dwc->gadget_driver = NULL; 1629b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi 1630b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbierr1: 163172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 163272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1633b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi free_irq(irq, dwc); 1634b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi 1635b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbierr0: 163672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 163772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 163872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 163972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_stop(struct usb_gadget *g, 164072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct usb_gadget_driver *driver) 164172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 164272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 164372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 16448698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi int irq; 164572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 164672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 164772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 16488698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi dwc3_gadget_disable_irq(dwc); 164972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi __dwc3_gadget_ep_disable(dwc->eps[0]); 165072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi __dwc3_gadget_ep_disable(dwc->eps[1]); 165172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 165272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver = NULL; 165372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 165472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 165572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1656b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi irq = platform_get_irq(to_platform_device(dwc->dev), 0); 1657b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi free_irq(irq, dwc); 1658b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi 165972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 166072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 1661802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman 166272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic const struct usb_gadget_ops dwc3_gadget_ops = { 166372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .get_frame = dwc3_gadget_get_frame, 166472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .wakeup = dwc3_gadget_wakeup, 166572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .set_selfpowered = dwc3_gadget_set_selfpowered, 166672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .pullup = dwc3_gadget_pullup, 166772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .udc_start = dwc3_gadget_start, 166872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .udc_stop = dwc3_gadget_stop, 166972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi}; 167072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 167172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 167272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 16736a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbistatic int dwc3_gadget_init_hw_endpoints(struct dwc3 *dwc, 16746a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi u8 num, u32 direction) 167572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 167672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 16776a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi u8 i; 167872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 16796a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi for (i = 0; i < num; i++) { 16806a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi u8 epnum = (i << 1) | (!!direction); 168172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 168272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = kzalloc(sizeof(*dep), GFP_KERNEL); 168372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dep) { 168472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "can't allocate endpoint %d\n", 168572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi epnum); 168672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -ENOMEM; 168772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 168872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 168972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->dwc = dwc; 169072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->number = epnum; 16919aa62ae4292a2450634345d79a7fa1461bf7b39cFelipe Balbi dep->direction = !!direction; 169272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->eps[epnum] = dep; 169372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 169472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi snprintf(dep->name, sizeof(dep->name), "ep%d%s", epnum >> 1, 169572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi (epnum & 1) ? "in" : "out"); 16966a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi 169772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->endpoint.name = dep->name; 169872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1699653df35e6b3c0df875999a9b842327301269f55dFelipe Balbi dev_vdbg(dwc->dev, "initializing %s\n", dep->name); 1700653df35e6b3c0df875999a9b842327301269f55dFelipe Balbi 170172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (epnum == 0 || epnum == 1) { 1702e117e742d310683b410951faeab4b13b6c3c609fRobert Baldyga usb_ep_set_maxpacket_limit(&dep->endpoint, 512); 17036048e4c69d80600baba35856651056860d5d8f5aPratyush Anand dep->endpoint.maxburst = 1; 170472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->endpoint.ops = &dwc3_gadget_ep0_ops; 170572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!epnum) 170672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ep0 = &dep->endpoint; 170772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 170872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 170972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1710e117e742d310683b410951faeab4b13b6c3c609fRobert Baldyga usb_ep_set_maxpacket_limit(&dep->endpoint, 1024); 171112d36c16bde3ee0643d705caa87723de536dbe49Sebastian Andrzej Siewior dep->endpoint.max_streams = 15; 171272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->endpoint.ops = &dwc3_gadget_ep_ops; 171372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_add_tail(&dep->endpoint.ep_list, 171472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi &dwc->gadget.ep_list); 171572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 171672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_alloc_trb_pool(dep); 171725b8ff68bf1d4954d4a9dcb4862c6b6a53cb09e2Felipe Balbi if (ret) 171872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 171972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 172025b8ff68bf1d4954d4a9dcb4862c6b6a53cb09e2Felipe Balbi 172172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi INIT_LIST_HEAD(&dep->request_list); 172272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi INIT_LIST_HEAD(&dep->req_queued); 172372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 172472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 172572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 172672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 172772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 17286a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbistatic int dwc3_gadget_init_endpoints(struct dwc3 *dwc) 17296a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi{ 17306a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi int ret; 17316a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi 17326a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi INIT_LIST_HEAD(&dwc->gadget.ep_list); 17336a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi 17346a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi ret = dwc3_gadget_init_hw_endpoints(dwc, dwc->num_out_eps, 0); 17356a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi if (ret < 0) { 17366a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi dev_vdbg(dwc->dev, "failed to allocate OUT endpoints\n"); 17376a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi return ret; 17386a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi } 17396a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi 17406a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi ret = dwc3_gadget_init_hw_endpoints(dwc, dwc->num_in_eps, 1); 17416a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi if (ret < 0) { 17426a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi dev_vdbg(dwc->dev, "failed to allocate IN endpoints\n"); 17436a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi return ret; 17446a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi } 17456a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi 17466a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi return 0; 17476a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi} 17486a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi 174972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_free_endpoints(struct dwc3 *dwc) 175072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 175172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 175272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 epnum; 175372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 175472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi for (epnum = 0; epnum < DWC3_ENDPOINTS_NUM; epnum++) { 175572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[epnum]; 17566a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi if (!dep) 17576a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi continue; 17585bf8fae33d14cc5c3c53a926f9079f92c8b082b0George Cherian /* 17595bf8fae33d14cc5c3c53a926f9079f92c8b082b0George Cherian * Physical endpoints 0 and 1 are special; they form the 17605bf8fae33d14cc5c3c53a926f9079f92c8b082b0George Cherian * bi-directional USB endpoint 0. 17615bf8fae33d14cc5c3c53a926f9079f92c8b082b0George Cherian * 17625bf8fae33d14cc5c3c53a926f9079f92c8b082b0George Cherian * For those two physical endpoints, we don't allocate a TRB 17635bf8fae33d14cc5c3c53a926f9079f92c8b082b0George Cherian * pool nor do we add them the endpoints list. Due to that, we 17645bf8fae33d14cc5c3c53a926f9079f92c8b082b0George Cherian * shouldn't do these two operations otherwise we would end up 17655bf8fae33d14cc5c3c53a926f9079f92c8b082b0George Cherian * with all sorts of bugs when removing dwc3.ko. 17665bf8fae33d14cc5c3c53a926f9079f92c8b082b0George Cherian */ 17675bf8fae33d14cc5c3c53a926f9079f92c8b082b0George Cherian if (epnum != 0 && epnum != 1) { 17685bf8fae33d14cc5c3c53a926f9079f92c8b082b0George Cherian dwc3_free_trb_pool(dep); 176972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_del(&dep->endpoint.ep_list); 17705bf8fae33d14cc5c3c53a926f9079f92c8b082b0George Cherian } 177172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 177272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi kfree(dep); 177372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 177472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 177572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 177672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 1777e5caff6831d00d96b4618de939312570527ad54aFelipe Balbi 1778e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anandstatic int __dwc3_cleanup_done_trbs(struct dwc3 *dwc, struct dwc3_ep *dep, 1779e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand struct dwc3_request *req, struct dwc3_trb *trb, 178072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct dwc3_event_depevt *event, int status) 178172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 178272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned int count; 178372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned int s_pkt = 0; 1784d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand unsigned int trb_status; 178572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1786e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if ((trb->ctrl & DWC3_TRB_CTRL_HWO) && status != -ESHUTDOWN) 1787e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand /* 1788e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * We continue despite the error. There is not much we 1789e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * can do. If we don't clean it up we loop forever. If 1790e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * we skip the TRB then it gets overwritten after a 1791e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * while since we use them in a ring buffer. A BUG() 1792e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * would help. Lets hope that if this occurs, someone 1793e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * fixes the root cause instead of looking away :) 1794e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand */ 1795e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand dev_err(dwc->dev, "%s's TRB (%p) still owned by HW\n", 1796e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand dep->name, trb); 1797e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand count = trb->size & DWC3_TRB_SIZE_MASK; 1798e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand 1799e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if (dep->direction) { 1800e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if (count) { 1801e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand trb_status = DWC3_TRB_SIZE_TRBSTS(trb->size); 1802e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if (trb_status == DWC3_TRBSTS_MISSED_ISOC) { 1803e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand dev_dbg(dwc->dev, "incomplete IN transfer %s\n", 1804e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand dep->name); 1805e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand /* 1806e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * If missed isoc occurred and there is 1807e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * no request queued then issue END 1808e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * TRANSFER, so that core generates 1809e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * next xfernotready and we will issue 1810e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * a fresh START TRANSFER. 1811e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * If there are still queued request 1812e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * then wait, do not issue either END 1813e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * or UPDATE TRANSFER, just attach next 1814e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * request in request_list during 1815e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * giveback.If any future queued request 1816e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * is successfully transferred then we 1817e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * will issue UPDATE TRANSFER for all 1818e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * request in the request_list. 1819e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand */ 1820e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand dep->flags |= DWC3_EP_MISSED_ISOC; 1821e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand } else { 1822e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand dev_err(dwc->dev, "incomplete IN transfer %s\n", 1823e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand dep->name); 1824e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand status = -ECONNRESET; 1825e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand } 1826e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand } else { 1827e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand dep->flags &= ~DWC3_EP_MISSED_ISOC; 1828e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand } 1829e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand } else { 1830e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if (count && (event->status & DEPEVT_STATUS_SHORT)) 1831e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand s_pkt = 1; 1832e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand } 1833e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand 1834e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand /* 1835e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * We assume here we will always receive the entire data block 1836e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * which we should receive. Meaning, if we program RX to 1837e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * receive 4K but we receive only 2K, we assume that's all we 1838e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * should receive and we simply bounce the request back to the 1839e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * gadget driver for further processing. 1840e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand */ 1841e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand req->request.actual += req->request.length - count; 1842e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if (s_pkt) 1843e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand return 1; 1844e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if ((event->status & DEPEVT_STATUS_LST) && 1845e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand (trb->ctrl & (DWC3_TRB_CTRL_LST | 1846e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand DWC3_TRB_CTRL_HWO))) 1847e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand return 1; 1848e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if ((event->status & DEPEVT_STATUS_IOC) && 1849e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand (trb->ctrl & DWC3_TRB_CTRL_IOC)) 1850e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand return 1; 1851e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand return 0; 1852e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand} 1853e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand 1854e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anandstatic int dwc3_cleanup_done_reqs(struct dwc3 *dwc, struct dwc3_ep *dep, 1855e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand const struct dwc3_event_depevt *event, int status) 1856e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand{ 1857e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand struct dwc3_request *req; 1858e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand struct dwc3_trb *trb; 1859e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand unsigned int slot; 1860e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand unsigned int i; 1861e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand int ret; 1862e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand 186372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi do { 186472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req = next_request(&dep->req_queued); 1865d39ee7be2aaf0a53d7b5f43c13571bac95f7cc0cSebastian Andrzej Siewior if (!req) { 1866d39ee7be2aaf0a53d7b5f43c13571bac95f7cc0cSebastian Andrzej Siewior WARN_ON_ONCE(1); 1867d39ee7be2aaf0a53d7b5f43c13571bac95f7cc0cSebastian Andrzej Siewior return 1; 1868d39ee7be2aaf0a53d7b5f43c13571bac95f7cc0cSebastian Andrzej Siewior } 1869e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand i = 0; 1870e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand do { 1871e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand slot = req->start_slot + i; 1872e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if ((slot == DWC3_TRB_NUM - 1) && 1873e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand usb_endpoint_xfer_isoc(dep->endpoint.desc)) 1874e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand slot++; 1875e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand slot %= DWC3_TRB_NUM; 1876e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand trb = &dep->trb_pool[slot]; 187772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1878e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand ret = __dwc3_cleanup_done_trbs(dwc, dep, req, trb, 1879e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand event, status); 1880e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if (ret) 1881e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand break; 1882e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand }while (++i < req->request.num_mapped_sgs); 188372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 188472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_giveback(dep, req, status); 1885e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand 1886e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if (ret) 188772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 188872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } while (1); 188972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1890cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand if (usb_endpoint_xfer_isoc(dep->endpoint.desc) && 1891cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand list_empty(&dep->req_queued)) { 1892cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand if (list_empty(&dep->request_list)) { 1893cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand /* 1894cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand * If there is no entry in request list then do 1895cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand * not issue END TRANSFER now. Just set PENDING 1896cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand * flag, so that END TRANSFER is issued when an 1897cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand * entry is added into request list. 1898cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand */ 1899cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand dep->flags = DWC3_EP_PENDING_REQUEST; 1900cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand } else { 1901b992e6813e257269e9599ca07be8bd52df784bf5Paul Zimmerman dwc3_stop_active_transfer(dwc, dep->number, true); 1902cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand dep->flags = DWC3_EP_ENABLED; 1903cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand } 19047efea86c2868b8fd9df65e589e33aebe498ce21dPratyush Anand return 1; 19057efea86c2868b8fd9df65e589e33aebe498ce21dPratyush Anand } 19067efea86c2868b8fd9df65e589e33aebe498ce21dPratyush Anand 190772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 1; 190872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 190972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 191072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_endpoint_transfer_complete(struct dwc3 *dwc, 191172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep, const struct dwc3_event_depevt *event, 191272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int start_new) 191372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 191472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned status = 0; 191572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int clean_busy; 191672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 191772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (event->status & DEPEVT_STATUS_BUSERR) 191872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi status = -ECONNRESET; 191972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 19201d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman clean_busy = dwc3_cleanup_done_reqs(dwc, dep, event, status); 1921c2df85ca31645ed3c68c56bd30a3673e034224f1Paul Zimmerman if (clean_busy) 192272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags &= ~DWC3_EP_BUSY; 1923fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1924fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi /* 1925fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * WORKAROUND: This is the 2nd half of U1/U2 -> U0 workaround. 1926fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * See dwc3_gadget_linksts_change_interrupt() for 1st half. 1927fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi */ 1928fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi if (dwc->revision < DWC3_REVISION_183A) { 1929fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi u32 reg; 1930fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi int i; 1931fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1932fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi for (i = 0; i < DWC3_ENDPOINTS_NUM; i++) { 1933348e026fafe2501281db5fb7fed599b337cad358Moiz Sonasath dep = dwc->eps[i]; 1934fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1935fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) 1936fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi continue; 1937fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1938fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi if (!list_empty(&dep->req_queued)) 1939fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi return; 1940fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi } 1941fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1942fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 1943fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi reg |= dwc->u1u2; 1944fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 1945fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1946fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi dwc->u1u2 = 0; 1947fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi } 194872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 194972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 195072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_endpoint_interrupt(struct dwc3 *dwc, 195172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct dwc3_event_depevt *event) 195272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 195372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 195472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 epnum = event->endpoint_number; 195572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 195672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[epnum]; 195772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 19583336abb5b608300550136ddab7a7101b30d45fa7Felipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) 19593336abb5b608300550136ddab7a7101b30d45fa7Felipe Balbi return; 19603336abb5b608300550136ddab7a7101b30d45fa7Felipe Balbi 196172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s: %s\n", dep->name, 196272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_ep_event_string(event->endpoint_event)); 196372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 196472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (epnum == 0 || epnum == 1) { 196572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_ep0_interrupt(dwc, event); 196672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 196772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 196872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 196972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (event->endpoint_event) { 197072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPEVT_XFERCOMPLETE: 1971b4996a8631e80a2aaddb5c487ff6b9ad37315f70Felipe Balbi dep->resource_index = 0; 1972c2df85ca31645ed3c68c56bd30a3673e034224f1Paul Zimmerman 197316e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if (usb_endpoint_xfer_isoc(dep->endpoint.desc)) { 197472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "%s is an Isochronous endpoint\n", 197572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 197672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 197772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 197872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 197972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_endpoint_transfer_complete(dwc, dep, event, 1); 198072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 198172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPEVT_XFERINPROGRESS: 198216e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if (!usb_endpoint_xfer_isoc(dep->endpoint.desc)) { 198372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "%s is not an Isochronous endpoint\n", 198472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 198572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 198672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 198772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 198872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_endpoint_transfer_complete(dwc, dep, event, 0); 198972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 199072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPEVT_XFERNOTREADY: 199116e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if (usb_endpoint_xfer_isoc(dep->endpoint.desc)) { 199272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_start_isoc(dwc, dep, event); 199372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 199472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 199572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 199672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s: reason %s\n", 199740aa41fba348bc5bd19ff5bcf2b03d67bb01d1ceFelipe Balbi dep->name, event->status & 199840aa41fba348bc5bd19ff5bcf2b03d67bb01d1ceFelipe Balbi DEPEVT_STATUS_TRANSFER_ACTIVE 199972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ? "Transfer Active" 200072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi : "Transfer Not Active"); 200172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 200272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = __dwc3_gadget_kick_transfer(dep, 0, 1); 200372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!ret || ret == -EBUSY) 200472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 200572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 200672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "%s: failed to kick transfers\n", 200772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 200872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 200972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 201072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 2011879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi case DWC3_DEPEVT_STREAMEVT: 201216e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if (!usb_endpoint_xfer_bulk(dep->endpoint.desc)) { 2013879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dev_err(dwc->dev, "Stream event for non-Bulk %s\n", 2014879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dep->name); 2015879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi return; 2016879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi } 2017879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi 2018879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi switch (event->status) { 2019879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi case DEPEVT_STREAMEVT_FOUND: 2020879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dev_vdbg(dwc->dev, "Stream %d found and started\n", 2021879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi event->parameters); 2022879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi 2023879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi break; 2024879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi case DEPEVT_STREAMEVT_NOTFOUND: 2025879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi /* FALLTHROUGH */ 2026879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi default: 2027879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dev_dbg(dwc->dev, "Couldn't find suitable stream\n"); 2028879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi } 2029879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi break; 203072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPEVT_RXTXFIFOEVT: 203172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "%s FIFO Overrun\n", dep->name); 203272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 203372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPEVT_EPCMDCMPLT: 2034ea53b8828c50b7a5138a8931c41b2671682c86b5Felipe Balbi dev_vdbg(dwc->dev, "Endpoint Command Complete\n"); 203572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 203672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 203772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 203872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 203972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_disconnect_gadget(struct dwc3 *dwc) 204072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 204172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dwc->gadget_driver && dwc->gadget_driver->disconnect) { 204272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock(&dwc->lock); 204372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver->disconnect(&dwc->gadget); 204472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock(&dwc->lock); 204572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 204672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 204772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 2048bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbistatic void dwc3_suspend_gadget(struct dwc3 *dwc) 2049bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi{ 2050bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi if (dwc->gadget_driver && dwc->gadget_driver->disconnect) { 2051bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi spin_unlock(&dwc->lock); 2052bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi dwc->gadget_driver->suspend(&dwc->gadget); 2053bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi spin_lock(&dwc->lock); 2054bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi } 2055bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi} 2056bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi 2057bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbistatic void dwc3_resume_gadget(struct dwc3 *dwc) 2058bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi{ 2059bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi if (dwc->gadget_driver && dwc->gadget_driver->disconnect) { 2060bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi spin_unlock(&dwc->lock); 2061bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi dwc->gadget_driver->resume(&dwc->gadget); 2062bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi spin_lock(&dwc->lock); 2063bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi } 2064bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi} 2065bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi 2066b992e6813e257269e9599ca07be8bd52df784bf5Paul Zimmermanstatic void dwc3_stop_active_transfer(struct dwc3 *dwc, u32 epnum, bool force) 206772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 206872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 206972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 207072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 cmd; 207172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 207272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 207372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[epnum]; 207472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 2075b4996a8631e80a2aaddb5c487ff6b9ad37315f70Felipe Balbi if (!dep->resource_index) 20763daf74d78dfcd552445c35f1b82a271ca305ceb9Pratyush Anand return; 20773daf74d78dfcd552445c35f1b82a271ca305ceb9Pratyush Anand 207857911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand /* 207957911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * NOTICE: We are violating what the Databook says about the 208057911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * EndTransfer command. Ideally we would _always_ wait for the 208157911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * EndTransfer Command Completion IRQ, but that's causing too 208257911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * much trouble synchronizing between us and gadget driver. 208357911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * 208457911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * We have discussed this with the IP Provider and it was 208557911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * suggested to giveback all requests here, but give HW some 208657911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * extra time to synchronize with the interconnect. We're using 208757911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * an arbitraty 100us delay for that. 208857911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * 208957911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * Note also that a similar handling was tested by Synopsys 209057911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * (thanks a lot Paul) and nothing bad has come out of it. 209157911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * In short, what we're doing is: 209257911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * 209357911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * - Issue EndTransfer WITH CMDIOC bit set 209457911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * - Wait 100us 209557911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand */ 209657911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand 20973daf74d78dfcd552445c35f1b82a271ca305ceb9Pratyush Anand cmd = DWC3_DEPCMD_ENDTRANSFER; 2098b992e6813e257269e9599ca07be8bd52df784bf5Paul Zimmerman cmd |= force ? DWC3_DEPCMD_HIPRI_FORCERM : 0; 2099b992e6813e257269e9599ca07be8bd52df784bf5Paul Zimmerman cmd |= DWC3_DEPCMD_CMDIOC; 2100b4996a8631e80a2aaddb5c487ff6b9ad37315f70Felipe Balbi cmd |= DWC3_DEPCMD_PARAM(dep->resource_index); 21013daf74d78dfcd552445c35f1b82a271ca305ceb9Pratyush Anand memset(¶ms, 0, sizeof(params)); 21023daf74d78dfcd552445c35f1b82a271ca305ceb9Pratyush Anand ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, cmd, ¶ms); 21033daf74d78dfcd552445c35f1b82a271ca305ceb9Pratyush Anand WARN_ON_ONCE(ret); 2104b4996a8631e80a2aaddb5c487ff6b9ad37315f70Felipe Balbi dep->resource_index = 0; 2105041d81f493d90c940ec41f0ec98bc7c4f2fba431Felipe Balbi dep->flags &= ~DWC3_EP_BUSY; 210657911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand udelay(100); 210772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 210872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 210972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_stop_active_transfers(struct dwc3 *dwc) 211072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 211172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 epnum; 211272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 211372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi for (epnum = 2; epnum < DWC3_ENDPOINTS_NUM; epnum++) { 211472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 211572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 211672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[epnum]; 21176a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi if (!dep) 21186a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi continue; 21196a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi 212072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) 212172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi continue; 212272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 2123624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior dwc3_remove_requests(dwc, dep); 212472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 212572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 212672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 212772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_clear_stall_all_ep(struct dwc3 *dwc) 212872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 212972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 epnum; 213072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 213172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi for (epnum = 1; epnum < DWC3_ENDPOINTS_NUM; epnum++) { 213272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 213372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 213472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 213572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 213672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[epnum]; 21376a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi if (!dep) 21386a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi continue; 213972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 214072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(dep->flags & DWC3_EP_STALL)) 214172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi continue; 214272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 214372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags &= ~DWC3_EP_STALL; 214472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 214572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0, sizeof(params)); 214672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, 214772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEPCMD_CLEARSTALL, ¶ms); 214872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi WARN_ON_ONCE(ret); 214972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 215072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 215172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 215272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_disconnect_interrupt(struct dwc3 *dwc) 215372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 2154c4430a26948b84c0d820e83f8c640229f960d3b6Felipe Balbi int reg; 2155c4430a26948b84c0d820e83f8c640229f960d3b6Felipe Balbi 215672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s\n", __func__); 215772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 215872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 215972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DCTL_INITU1ENA; 216072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 216172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 216272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DCTL_INITU2ENA; 216372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 216472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 216572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_disconnect_gadget(dwc); 2166b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman dwc->start_config_issued = false; 216772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 216872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_UNKNOWN; 2169df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi dwc->setup_packet_pending = false; 217072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 217172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 217272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_reset_interrupt(struct dwc3 *dwc) 217372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 217472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 217572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 217672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s\n", __func__); 217772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 2178df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi /* 2179df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * WORKAROUND: DWC3 revisions <1.88a have an issue which 2180df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * would cause a missing Disconnect Event if there's a 2181df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * pending Setup Packet in the FIFO. 2182df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * 2183df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * There's no suggested workaround on the official Bug 2184df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * report, which states that "unless the driver/application 2185df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * is doing any special handling of a disconnect event, 2186df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * there is no functional issue". 2187df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * 2188df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * Unfortunately, it turns out that we _do_ some special 2189df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * handling of a disconnect event, namely complete all 2190df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * pending transfers, notify gadget driver of the 2191df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * disconnection, and so on. 2192df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * 2193df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * Our suggested workaround is to follow the Disconnect 2194df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * Event steps here, instead, based on a setup_packet_pending 2195df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * flag. Such flag gets set whenever we have a XferNotReady 2196df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * event on EP0 and gets cleared on XferComplete for the 2197df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * same endpoint. 2198df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * 2199df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * Refers to: 2200df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * 2201df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * STAR#9000466709: RTL: Device : Disconnect event not 2202df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * generated if setup packet pending in FIFO 2203df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi */ 2204df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi if (dwc->revision < DWC3_REVISION_188A) { 2205df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi if (dwc->setup_packet_pending) 2206df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi dwc3_gadget_disconnect_interrupt(dwc); 2207df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi } 2208df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi 2209961906edb549c95f4cc33e4f3dbfd0fcc364954dFelipe Balbi /* after reset -> Default State */ 221014cd592f72ea1ce1a25d7a576a5ed6aa761456bcFelipe Balbi usb_gadget_set_state(&dwc->gadget, USB_STATE_DEFAULT); 2211961906edb549c95f4cc33e4f3dbfd0fcc364954dFelipe Balbi 221272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dwc->gadget.speed != USB_SPEED_UNKNOWN) 221372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_disconnect_gadget(dwc); 221472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 221572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 221672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DCTL_TSTCTRL_MASK; 221772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 22183b637367ae40b6d3c20e30cb0cdd059e67bbf848Gerard Cauvy dwc->test_mode = false; 221972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 222072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_stop_active_transfers(dwc); 222172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_clear_stall_all_ep(dwc); 2222b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman dwc->start_config_issued = false; 222372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 222472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* Reset device address to zero */ 222572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCFG); 222672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~(DWC3_DCFG_DEVADDR_MASK); 222772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCFG, reg); 222872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 222972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 223072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_update_ram_clk_sel(struct dwc3 *dwc, u32 speed) 223172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 223272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 223372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 usb30_clock = DWC3_GCTL_CLK_BUS; 223472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 223572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 223672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We change the clock only at SS but I dunno why I would want to do 223772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * this. Maybe it becomes part of the power saving plan. 223872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 223972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 224072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (speed != DWC3_DSTS_SUPERSPEED) 224172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 224272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 224372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 224472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * RAMClkSel is reset to 0 after USB reset, so it must be reprogrammed 224572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * each time on Connect Done. 224672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 224772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!usb30_clock) 224872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 224972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 225072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_GCTL); 225172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg |= DWC3_GCTL_RAMCLKSEL(usb30_clock); 225272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_GCTL, reg); 225372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 225472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 225572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_conndone_interrupt(struct dwc3 *dwc) 225672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 225772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 225872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 225972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 226072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 speed; 226172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 226272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s\n", __func__); 226372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 226472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 226572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi speed = reg & DWC3_DSTS_CONNECTSPD; 226672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->speed = speed; 226772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 226872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_update_ram_clk_sel(dwc, speed); 226972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 227072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (speed) { 227172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DCFG_SUPERSPEED: 227205870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi /* 227305870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * WORKAROUND: DWC3 revisions <1.90a have an issue which 227405870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * would cause a missing USB3 Reset event. 227505870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * 227605870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * In such situations, we should force a USB3 Reset 227705870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * event by calling our dwc3_gadget_reset_interrupt() 227805870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * routine. 227905870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * 228005870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * Refers to: 228105870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * 228205870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * STAR#9000483510: RTL: SS : USB3 reset event may 228305870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * not be generated always when the link enters poll 228405870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi */ 228505870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi if (dwc->revision < DWC3_REVISION_190A) 228605870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi dwc3_gadget_reset_interrupt(dwc); 228705870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi 228872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(512); 228972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ep0->maxpacket = 512; 229072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_SUPER; 229172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 229272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DCFG_HIGHSPEED: 229372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(64); 229472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ep0->maxpacket = 64; 229572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_HIGH; 229672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 229772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DCFG_FULLSPEED2: 229872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DCFG_FULLSPEED1: 229972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(64); 230072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ep0->maxpacket = 64; 230172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_FULL; 230272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 230372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DCFG_LOWSPEED: 230472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(8); 230572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ep0->maxpacket = 8; 230672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_LOW; 230772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 230872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 230972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 23102b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand /* Enable USB2 LPM Capability */ 23112b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand 23122b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand if ((dwc->revision > DWC3_REVISION_194A) 23132b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand && (speed != DWC3_DCFG_SUPERSPEED)) { 23142b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand reg = dwc3_readl(dwc->regs, DWC3_DCFG); 23152b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand reg |= DWC3_DCFG_LPM_CAP; 23162b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand dwc3_writel(dwc->regs, DWC3_DCFG, reg); 23172b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand 23182b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand reg = dwc3_readl(dwc->regs, DWC3_DCTL); 23192b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand reg &= ~(DWC3_DCTL_HIRD_THRES_MASK | DWC3_DCTL_L1_HIBER_EN); 23202b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand 23211a947746dbe1486d0e305ab512ddf085b7874cb3Felipe Balbi /* 23221a947746dbe1486d0e305ab512ddf085b7874cb3Felipe Balbi * TODO: This should be configurable. For now using 23231a947746dbe1486d0e305ab512ddf085b7874cb3Felipe Balbi * maximum allowed HIRD threshold value of 0b1100 23241a947746dbe1486d0e305ab512ddf085b7874cb3Felipe Balbi */ 23251a947746dbe1486d0e305ab512ddf085b7874cb3Felipe Balbi reg |= DWC3_DCTL_HIRD_THRES(12); 23262b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand 23272b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand dwc3_writel(dwc->regs, DWC3_DCTL, reg); 2328356363bf6b2fc4785d874ef87ed2fad4b8543490Felipe Balbi } else { 2329356363bf6b2fc4785d874ef87ed2fad4b8543490Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 2330356363bf6b2fc4785d874ef87ed2fad4b8543490Felipe Balbi reg &= ~DWC3_DCTL_HIRD_THRES_MASK; 2331356363bf6b2fc4785d874ef87ed2fad4b8543490Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 23322b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand } 23332b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand 233472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[0]; 2335265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL, true, 2336265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman false); 233772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 233872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to enable %s\n", dep->name); 233972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 234072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 234172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 234272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[1]; 2343265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL, true, 2344265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman false); 234572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 234672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to enable %s\n", dep->name); 234772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 234872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 234972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 235072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 235172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Configure PHY via GUSB3PIPECTLn if required. 235272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 235372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Update GTXFIFOSIZn 235472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 235572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * In both cases reset values should be sufficient. 235672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 235772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 235872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 235972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_wakeup_interrupt(struct dwc3 *dwc) 236072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 236172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s\n", __func__); 236272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 236372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 236472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * TODO take core out of low power mode when that's 236572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * implemented. 236672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 236772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 236872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver->resume(&dwc->gadget); 236972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 237072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 237172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_linksts_change_interrupt(struct dwc3 *dwc, 237272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned int evtinfo) 237372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 2374fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi enum dwc3_link_state next = evtinfo & DWC3_LINK_STATE_MASK; 23750b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi unsigned int pwropt; 23760b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi 23770b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi /* 23780b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi * WORKAROUND: DWC3 < 2.50a have an issue when configured without 23790b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi * Hibernation mode enabled which would show up when device detects 23800b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi * host-initiated U3 exit. 23810b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi * 23820b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi * In that case, device will generate a Link State Change Interrupt 23830b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi * from U3 to RESUME which is only necessary if Hibernation is 23840b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi * configured in. 23850b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi * 23860b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi * There are no functional changes due to such spurious event and we 23870b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi * just need to ignore it. 23880b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi * 23890b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi * Refers to: 23900b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi * 23910b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi * STAR#9000570034 RTL: SS Resume event generated in non-Hibernation 23920b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi * operational mode 23930b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi */ 23940b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi pwropt = DWC3_GHWPARAMS1_EN_PWROPT(dwc->hwparams.hwparams1); 23950b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi if ((dwc->revision < DWC3_REVISION_250A) && 23960b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi (pwropt != DWC3_GHWPARAMS1_EN_PWROPT_HIB)) { 23970b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi if ((dwc->link_state == DWC3_LINK_STATE_U3) && 23980b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi (next == DWC3_LINK_STATE_RESUME)) { 23990b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi dev_vdbg(dwc->dev, "ignoring transition U3 -> Resume\n"); 24000b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi return; 24010b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi } 24020b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi } 2403fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 2404fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi /* 2405fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * WORKAROUND: DWC3 Revisions <1.83a have an issue which, depending 2406fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * on the link partner, the USB session might do multiple entry/exit 2407fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * of low power states before a transfer takes place. 2408fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * 2409fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * Due to this problem, we might experience lower throughput. The 2410fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * suggested workaround is to disable DCTL[12:9] bits if we're 2411fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * transitioning from U1/U2 to U0 and enable those bits again 2412fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * after a transfer completes and there are no pending transfers 2413fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * on any of the enabled endpoints. 2414fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * 2415fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * This is the first half of that workaround. 2416fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * 2417fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * Refers to: 2418fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * 2419fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * STAR#9000446952: RTL: Device SS : if U1/U2 ->U0 takes >128us 2420fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * core send LGO_Ux entering U0 2421fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi */ 2422fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi if (dwc->revision < DWC3_REVISION_183A) { 2423fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi if (next == DWC3_LINK_STATE_U0) { 2424fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi u32 u1u2; 2425fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi u32 reg; 2426fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 2427fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi switch (dwc->link_state) { 2428fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi case DWC3_LINK_STATE_U1: 2429fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi case DWC3_LINK_STATE_U2: 2430fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 2431fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi u1u2 = reg & (DWC3_DCTL_INITU2ENA 2432fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi | DWC3_DCTL_ACCEPTU2ENA 2433fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi | DWC3_DCTL_INITU1ENA 2434fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi | DWC3_DCTL_ACCEPTU1ENA); 2435fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 2436fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi if (!dwc->u1u2) 2437fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi dwc->u1u2 = reg & u1u2; 2438fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 2439fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi reg &= ~u1u2; 2440fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 2441fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 2442fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi break; 2443fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi default: 2444fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi /* do nothing */ 2445fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi break; 2446fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi } 2447fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi } 2448fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi } 2449fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 2450fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi dwc->link_state = next; 2451019ac83252dc2b356cb0ca81c25a077ec90309e7Felipe Balbi 2452bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi switch (next) { 2453bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi case DWC3_LINK_STATE_U1: 2454bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi if (dwc->speed == USB_SPEED_SUPER) 2455bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi dwc3_suspend_gadget(dwc); 2456bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi break; 2457bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi case DWC3_LINK_STATE_U2: 2458bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi case DWC3_LINK_STATE_U3: 2459bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi dwc3_suspend_gadget(dwc); 2460bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi break; 2461bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi case DWC3_LINK_STATE_RESUME: 2462bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi dwc3_resume_gadget(dwc); 2463bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi break; 2464bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi default: 2465bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi /* do nothing */ 2466bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi break; 2467bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi } 2468bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi 2469019ac83252dc2b356cb0ca81c25a077ec90309e7Felipe Balbi dev_vdbg(dwc->dev, "%s link %d\n", __func__, dwc->link_state); 247072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 247172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 2472e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbistatic void dwc3_gadget_hibernation_interrupt(struct dwc3 *dwc, 2473e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi unsigned int evtinfo) 2474e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi{ 2475e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi unsigned int is_ss = evtinfo & BIT(4); 2476e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi 2477e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi /** 2478e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi * WORKAROUND: DWC3 revison 2.20a with hibernation support 2479e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi * have a known issue which can cause USB CV TD.9.23 to fail 2480e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi * randomly. 2481e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi * 2482e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi * Because of this issue, core could generate bogus hibernation 2483e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi * events which SW needs to ignore. 2484e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi * 2485e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi * Refers to: 2486e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi * 2487e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi * STAR#9000546576: Device Mode Hibernation: Issue in USB 2.0 2488e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi * Device Fallback from SuperSpeed 2489e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi */ 2490e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi if (is_ss ^ (dwc->speed == USB_SPEED_SUPER)) 2491e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi return; 2492e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi 2493e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi /* enter hibernation here */ 2494e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi} 2495e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi 249672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_interrupt(struct dwc3 *dwc, 249772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct dwc3_event_devt *event) 249872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 249972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (event->type) { 250072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_DISCONNECT: 250172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_disconnect_interrupt(dwc); 250272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 250372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_RESET: 250472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_reset_interrupt(dwc); 250572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 250672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_CONNECT_DONE: 250772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_conndone_interrupt(dwc); 250872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 250972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_WAKEUP: 251072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_wakeup_interrupt(dwc); 251172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 2512e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi case DWC3_DEVICE_EVENT_HIBER_REQ: 2513e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi if (dev_WARN_ONCE(dwc->dev, !dwc->has_hibernation, 2514e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi "unexpected hibernation event\n")) 2515e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi break; 2516e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi 2517e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi dwc3_gadget_hibernation_interrupt(dwc, event->event_info); 2518e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi break; 251972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_LINK_STATUS_CHANGE: 252072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_linksts_change_interrupt(dwc, event->event_info); 252172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 252272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_EOPF: 252372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "End of Periodic Frame\n"); 252472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 252572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_SOF: 252672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "Start of Periodic Frame\n"); 252772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 252872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_ERRATIC_ERROR: 252972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "Erratic Error\n"); 253072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 253172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_CMD_CMPL: 253272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "Command Complete\n"); 253372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 253472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_OVERFLOW: 253572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "Overflow\n"); 253672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 253772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 253872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "UNKNOWN IRQ %d\n", event->type); 253972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 254072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 254172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 254272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_process_event_entry(struct dwc3 *dwc, 254372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const union dwc3_event *event) 254472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 254572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* Endpoint IRQ, handle it and return early */ 254672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (event->type.is_devspec == 0) { 254772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* depevt */ 254872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return dwc3_endpoint_interrupt(dwc, &event->depevt); 254972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 255072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 255172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (event->type.type) { 255272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_EVENT_TYPE_DEV: 255372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_interrupt(dwc, &event->devt); 255472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 255572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* REVISIT what to do with Carkit and I2C events ? */ 255672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 255772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "UNKNOWN IRQ type %d\n", event->raw); 255872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 255972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 256072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 2561f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbistatic irqreturn_t dwc3_process_event_buf(struct dwc3 *dwc, u32 buf) 2562b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi{ 2563f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi struct dwc3_event_buffer *evt; 2564b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi irqreturn_t ret = IRQ_NONE; 2565f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi int left; 2566e8adfc30ff9282a728fd8b666b6418308164c415Felipe Balbi u32 reg; 2567b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi 2568f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi evt = dwc->ev_buffs[buf]; 2569f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi left = evt->count; 2570b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi 2571f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi if (!(evt->flags & DWC3_EVENT_PENDING)) 2572f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi return IRQ_NONE; 2573b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi 2574f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi while (left > 0) { 2575f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi union dwc3_event event; 2576b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi 2577f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi event.raw = *(u32 *) (evt->buf + evt->lpos); 2578b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi 2579f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi dwc3_process_event_entry(dwc, &event); 2580b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi 2581f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi /* 2582f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi * FIXME we wrap around correctly to the next entry as 2583f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi * almost all entries are 4 bytes in size. There is one 2584f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi * entry which has 12 bytes which is a regular entry 2585f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi * followed by 8 bytes data. ATM I don't know how 2586f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi * things are organized if we get next to the a 2587f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi * boundary so I worry about that once we try to handle 2588f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi * that. 2589f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi */ 2590f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi evt->lpos = (evt->lpos + 4) % DWC3_EVENT_BUFFERS_SIZE; 2591f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi left -= 4; 2592b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi 2593f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi dwc3_writel(dwc->regs, DWC3_GEVNTCOUNT(buf), 4); 2594f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi } 2595b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi 2596f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi evt->count = 0; 2597f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi evt->flags &= ~DWC3_EVENT_PENDING; 2598f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi ret = IRQ_HANDLED; 2599b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi 2600f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi /* Unmask interrupt */ 2601f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi reg = dwc3_readl(dwc->regs, DWC3_GEVNTSIZ(buf)); 2602f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi reg &= ~DWC3_GEVNTSIZ_INTMASK; 2603f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi dwc3_writel(dwc->regs, DWC3_GEVNTSIZ(buf), reg); 2604b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi 2605f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi return ret; 2606f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi} 2607e8adfc30ff9282a728fd8b666b6418308164c415Felipe Balbi 2608f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbistatic irqreturn_t dwc3_thread_interrupt(int irq, void *_dwc) 2609f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi{ 2610f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi struct dwc3 *dwc = _dwc; 2611f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi unsigned long flags; 2612f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi irqreturn_t ret = IRQ_NONE; 2613f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi int i; 2614f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi 2615f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi spin_lock_irqsave(&dwc->lock, flags); 2616f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi 2617f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi for (i = 0; i < dwc->num_event_buffers; i++) 2618f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi ret |= dwc3_process_event_buf(dwc, i); 2619b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi 2620b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 2621b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi 2622b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi return ret; 2623b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi} 2624b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi 26257f97aa9865800766e570d0e1be772a034dd30388Felipe Balbistatic irqreturn_t dwc3_check_event_buf(struct dwc3 *dwc, u32 buf) 262672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 262772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_event_buffer *evt; 262872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 count; 2629e8adfc30ff9282a728fd8b666b6418308164c415Felipe Balbi u32 reg; 263072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 2631b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi evt = dwc->ev_buffs[buf]; 2632b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi 263372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi count = dwc3_readl(dwc->regs, DWC3_GEVNTCOUNT(buf)); 263472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi count &= DWC3_GEVNTCOUNT_MASK; 263572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!count) 263672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return IRQ_NONE; 263772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 2638b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi evt->count = count; 2639b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi evt->flags |= DWC3_EVENT_PENDING; 264072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 2641e8adfc30ff9282a728fd8b666b6418308164c415Felipe Balbi /* Mask interrupt */ 2642e8adfc30ff9282a728fd8b666b6418308164c415Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_GEVNTSIZ(buf)); 2643e8adfc30ff9282a728fd8b666b6418308164c415Felipe Balbi reg |= DWC3_GEVNTSIZ_INTMASK; 2644e8adfc30ff9282a728fd8b666b6418308164c415Felipe Balbi dwc3_writel(dwc->regs, DWC3_GEVNTSIZ(buf), reg); 2645e8adfc30ff9282a728fd8b666b6418308164c415Felipe Balbi 2646b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi return IRQ_WAKE_THREAD; 264772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 264872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 264972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic irqreturn_t dwc3_interrupt(int irq, void *_dwc) 265072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 265172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = _dwc; 265272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int i; 265372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi irqreturn_t ret = IRQ_NONE; 265472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 265572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock(&dwc->lock); 265672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 26579f622b2a407d8b34a5a7f5b4abd8b29b25cf4f32Felipe Balbi for (i = 0; i < dwc->num_event_buffers; i++) { 265872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi irqreturn_t status; 265972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 26607f97aa9865800766e570d0e1be772a034dd30388Felipe Balbi status = dwc3_check_event_buf(dwc, i); 2661b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi if (status == IRQ_WAKE_THREAD) 266272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = status; 266372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 266472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 266572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock(&dwc->lock); 266672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 266772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 266872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 266972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 267072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/** 267172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * dwc3_gadget_init - Initializes gadget related registers 26721d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * @dwc: pointer to our controller context structure 267372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 267472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Returns 0 on success otherwise negative errno. 267572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 267641ac7b3ab7fe1d6175839947a877fdf95cbd2211Bill Pembertonint dwc3_gadget_init(struct dwc3 *dwc) 267772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 267872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 267972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 268072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ctrl_req = dma_alloc_coherent(dwc->dev, sizeof(*dwc->ctrl_req), 268172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi &dwc->ctrl_req_addr, GFP_KERNEL); 268272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dwc->ctrl_req) { 268372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to allocate ctrl request\n"); 268472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -ENOMEM; 268572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto err0; 268672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 268772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 268872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ep0_trb = dma_alloc_coherent(dwc->dev, sizeof(*dwc->ep0_trb), 268972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi &dwc->ep0_trb_addr, GFP_KERNEL); 269072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dwc->ep0_trb) { 269172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to allocate ep0 trb\n"); 269272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -ENOMEM; 269372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto err1; 269472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 269572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 26963ef35fafdc87b72851f7785dc5331a0f4eb1b3ceFelipe Balbi dwc->setup_buf = kzalloc(DWC3_EP0_BOUNCE_SIZE, GFP_KERNEL); 269772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dwc->setup_buf) { 269872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to allocate setup buffer\n"); 269972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -ENOMEM; 270072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto err2; 270172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 270272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 27035812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi dwc->ep0_bounce = dma_alloc_coherent(dwc->dev, 27043ef35fafdc87b72851f7785dc5331a0f4eb1b3ceFelipe Balbi DWC3_EP0_BOUNCE_SIZE, &dwc->ep0_bounce_addr, 27053ef35fafdc87b72851f7785dc5331a0f4eb1b3ceFelipe Balbi GFP_KERNEL); 27065812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi if (!dwc->ep0_bounce) { 27075812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi dev_err(dwc->dev, "failed to allocate ep0 bounce buffer\n"); 27085812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi ret = -ENOMEM; 27095812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi goto err3; 27105812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi } 27115812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi 271272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ops = &dwc3_gadget_ops; 2713d327ab5b6d660d6fe22b073b743fde1668e593bbMichal Nazarewicz dwc->gadget.max_speed = USB_SPEED_SUPER; 271472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_UNKNOWN; 2715eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dwc->gadget.sg_supported = true; 271672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.name = "dwc3-gadget"; 271772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 271872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 2719a4b9d94b3dc8e65951c1819d37f213b3c6815adcDavid Cohen * Per databook, DWC3 needs buffer size to be aligned to MaxPacketSize 2720a4b9d94b3dc8e65951c1819d37f213b3c6815adcDavid Cohen * on ep out. 2721a4b9d94b3dc8e65951c1819d37f213b3c6815adcDavid Cohen */ 2722a4b9d94b3dc8e65951c1819d37f213b3c6815adcDavid Cohen dwc->gadget.quirk_ep_out_aligned_size = true; 2723a4b9d94b3dc8e65951c1819d37f213b3c6815adcDavid Cohen 2724a4b9d94b3dc8e65951c1819d37f213b3c6815adcDavid Cohen /* 272572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * REVISIT: Here we should clear all pending IRQs to be 272672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * sure we're starting from a well known location. 272772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 272872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 272972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_gadget_init_endpoints(dwc); 273072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 27315812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi goto err4; 273272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 273372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = usb_add_gadget_udc(dwc->dev, &dwc->gadget); 273472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 273572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to register udc\n"); 2736e1f804676a95b9d5caaa3a822d90bc1101595468David Cohen goto err4; 273772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 273872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 273972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 274072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 27415812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbierr4: 2742e1f804676a95b9d5caaa3a822d90bc1101595468David Cohen dwc3_gadget_free_endpoints(dwc); 27433ef35fafdc87b72851f7785dc5331a0f4eb1b3ceFelipe Balbi dma_free_coherent(dwc->dev, DWC3_EP0_BOUNCE_SIZE, 27443ef35fafdc87b72851f7785dc5331a0f4eb1b3ceFelipe Balbi dwc->ep0_bounce, dwc->ep0_bounce_addr); 27455812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi 274672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbierr3: 27470fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi kfree(dwc->setup_buf); 274872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 274972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbierr2: 275072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(*dwc->ep0_trb), 275172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ep0_trb, dwc->ep0_trb_addr); 275272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 275372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbierr1: 275472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(*dwc->ctrl_req), 275572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ctrl_req, dwc->ctrl_req_addr); 275672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 275772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbierr0: 275872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 275972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 276072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 27617415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi/* -------------------------------------------------------------------------- */ 27627415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 276372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbivoid dwc3_gadget_exit(struct dwc3 *dwc) 276472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 276572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi usb_del_gadget_udc(&dwc->gadget); 276672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 276772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_free_endpoints(dwc); 276872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 27693ef35fafdc87b72851f7785dc5331a0f4eb1b3ceFelipe Balbi dma_free_coherent(dwc->dev, DWC3_EP0_BOUNCE_SIZE, 27703ef35fafdc87b72851f7785dc5331a0f4eb1b3ceFelipe Balbi dwc->ep0_bounce, dwc->ep0_bounce_addr); 27715812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi 27720fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi kfree(dwc->setup_buf); 277372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 277472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(*dwc->ep0_trb), 277572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ep0_trb, dwc->ep0_trb_addr); 277672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 277772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(*dwc->ctrl_req), 277872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ctrl_req, dwc->ctrl_req_addr); 277972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 27807415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 27817415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbiint dwc3_gadget_prepare(struct dwc3 *dwc) 27827415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi{ 27837b2a0368bbc9bc4a7936d8587eaff4b8c35b2247Felipe Balbi if (dwc->pullups_connected) { 27847415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi dwc3_gadget_disable_irq(dwc); 27857b2a0368bbc9bc4a7936d8587eaff4b8c35b2247Felipe Balbi dwc3_gadget_run_stop(dwc, true, true); 27867b2a0368bbc9bc4a7936d8587eaff4b8c35b2247Felipe Balbi } 27877415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 27887415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi return 0; 27897415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi} 27907415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 27917415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbivoid dwc3_gadget_complete(struct dwc3 *dwc) 27927415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi{ 27937415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi if (dwc->pullups_connected) { 27947415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi dwc3_gadget_enable_irq(dwc); 27957b2a0368bbc9bc4a7936d8587eaff4b8c35b2247Felipe Balbi dwc3_gadget_run_stop(dwc, true, false); 27967415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi } 27977415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi} 27987415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 27997415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbiint dwc3_gadget_suspend(struct dwc3 *dwc) 28007415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi{ 28017415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi __dwc3_gadget_ep_disable(dwc->eps[0]); 28027415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi __dwc3_gadget_ep_disable(dwc->eps[1]); 28037415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 28047415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi dwc->dcfg = dwc3_readl(dwc->regs, DWC3_DCFG); 28057415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 28067415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi return 0; 28077415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi} 28087415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 28097415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbiint dwc3_gadget_resume(struct dwc3 *dwc) 28107415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi{ 28117415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi struct dwc3_ep *dep; 28127415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi int ret; 28137415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 28147415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi /* Start with SuperSpeed Default */ 28157415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(512); 28167415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 28177415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi dep = dwc->eps[0]; 2818265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL, false, 2819265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman false); 28207415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi if (ret) 28217415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi goto err0; 28227415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 28237415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi dep = dwc->eps[1]; 2824265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL, false, 2825265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman false); 28267415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi if (ret) 28277415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi goto err1; 28287415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 28297415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi /* begin to receive SETUP packets */ 28307415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi dwc->ep0state = EP0_SETUP_PHASE; 28317415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi dwc3_ep0_out_start(dwc); 28327415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 28337415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCFG, dwc->dcfg); 28347415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 28357415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi return 0; 28367415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 28377415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbierr1: 28387415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi __dwc3_gadget_ep_disable(dwc->eps[0]); 28397415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 28407415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbierr0: 28417415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi return ret; 28427415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi} 2843