gadget.c revision 7b2a0368bbc9bc4a7936d8587eaff4b8c35b2247
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 573624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewiorstatic void dwc3_stop_active_transfer(struct dwc3 *dwc, u32 epnum); 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)) { 579624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior dwc3_stop_active_transfer(dwc, dep->number); 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)) { 1102cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand dwc3_stop_active_transfer(dwc, dep->number); 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 113272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 113372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 113472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 113572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_queue(struct usb_ep *ep, struct usb_request *request, 113672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi gfp_t gfp_flags) 113772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 113872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req = to_dwc3_request(request); 113972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = to_dwc3_ep(ep); 114072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 114172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 114272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 114372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 114472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 114572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 114616e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if (!dep->endpoint.desc) { 114772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "trying to queue request %p to disabled %s\n", 114872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi request, ep->name); 114972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -ESHUTDOWN; 115072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 115172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 115272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "queing request %p to %s length %d\n", 115372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi request, ep->name, request->length); 115472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 115572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 115672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = __dwc3_gadget_ep_queue(dep, req); 115772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 115872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 115972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 116072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 116172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 116272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_dequeue(struct usb_ep *ep, 116372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct usb_request *request) 116472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 116572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req = to_dwc3_request(request); 116672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *r = NULL; 116772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 116872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = to_dwc3_ep(ep); 116972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 117072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 117172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 117272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret = 0; 117372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 117472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 117572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 117672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_for_each_entry(r, &dep->request_list, list) { 117772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (r == req) 117872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 117972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 118072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 118172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (r != req) { 118272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_for_each_entry(r, &dep->req_queued, list) { 118372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (r == req) 118472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 118572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 118672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (r == req) { 118772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* wait until it is processed */ 118872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_stop_active_transfer(dwc, dep->number); 1189e8d4e8be860d935099ffcf695dcd29b55ae50b36Pratyush Anand goto out1; 119072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 119172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "request %p was not queued to %s\n", 119272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi request, ep->name); 119372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EINVAL; 119472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto out0; 119572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 119672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1197e8d4e8be860d935099ffcf695dcd29b55ae50b36Pratyush Anandout1: 119872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* giveback the request */ 119972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_giveback(dep, req, -ECONNRESET); 120072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 120172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiout0: 120272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 120372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 120472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 120572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 120672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 120772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiint __dwc3_gadget_ep_set_halt(struct dwc3_ep *dep, int value) 120872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 120972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 121072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 121172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 121272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 121372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0x00, sizeof(params)); 121472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 121572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (value) { 121672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, 121772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEPCMD_SETSTALL, ¶ms); 121872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 121972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to %s STALL on %s\n", 122072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi value ? "set" : "clear", 122172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 122272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi else 122372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags |= DWC3_EP_STALL; 122472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 122572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, 122672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEPCMD_CLEARSTALL, ¶ms); 122772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 122872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to %s STALL on %s\n", 122972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi value ? "set" : "clear", 123072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 123172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi else 1232a535d81c92615b8ffb99b7e1fd1fb01effaed1afAlan Stern dep->flags &= ~(DWC3_EP_STALL | DWC3_EP_WEDGE); 123372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 12345275455a6e6ae6b57303834b0afd267bb9657ffcPaul Zimmerman 123572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 123672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 123772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 123872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_set_halt(struct usb_ep *ep, int value) 123972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 124072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = to_dwc3_ep(ep); 124172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 124272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 124372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 124472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 124572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 124672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 124772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 124872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 124916e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if (usb_endpoint_xfer_isoc(dep->endpoint.desc)) { 125072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "%s is of Isochronous type\n", dep->name); 125172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EINVAL; 125272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto out; 125372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 125472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 125572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = __dwc3_gadget_ep_set_halt(dep, value); 125672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiout: 125772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 125872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 125972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 126072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 126172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 126272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_set_wedge(struct usb_ep *ep) 126372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 126472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = to_dwc3_ep(ep); 1265249a456930cd2df29d085fb738b0e8f4bc1680cfPaul Zimmerman struct dwc3 *dwc = dep->dwc; 1266249a456930cd2df29d085fb738b0e8f4bc1680cfPaul Zimmerman unsigned long flags; 126772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1268249a456930cd2df29d085fb738b0e8f4bc1680cfPaul Zimmerman spin_lock_irqsave(&dwc->lock, flags); 126972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags |= DWC3_EP_WEDGE; 1270249a456930cd2df29d085fb738b0e8f4bc1680cfPaul Zimmerman spin_unlock_irqrestore(&dwc->lock, flags); 127172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 127208f0d96670c53898b4154e7945e77cdd966003f7Pratyush Anand if (dep->number == 0 || dep->number == 1) 127308f0d96670c53898b4154e7945e77cdd966003f7Pratyush Anand return dwc3_gadget_ep0_set_halt(ep, 1); 127408f0d96670c53898b4154e7945e77cdd966003f7Pratyush Anand else 127508f0d96670c53898b4154e7945e77cdd966003f7Pratyush Anand return dwc3_gadget_ep_set_halt(ep, 1); 127672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 127772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 127872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 127972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 128072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic struct usb_endpoint_descriptor dwc3_gadget_ep0_desc = { 128172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .bLength = USB_DT_ENDPOINT_SIZE, 128272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .bDescriptorType = USB_DT_ENDPOINT, 128372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .bmAttributes = USB_ENDPOINT_XFER_CONTROL, 128472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi}; 128572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 128672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic const struct usb_ep_ops dwc3_gadget_ep0_ops = { 128772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .enable = dwc3_gadget_ep0_enable, 128872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .disable = dwc3_gadget_ep0_disable, 128972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .alloc_request = dwc3_gadget_ep_alloc_request, 129072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .free_request = dwc3_gadget_ep_free_request, 129172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .queue = dwc3_gadget_ep0_queue, 129272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .dequeue = dwc3_gadget_ep_dequeue, 129308f0d96670c53898b4154e7945e77cdd966003f7Pratyush Anand .set_halt = dwc3_gadget_ep0_set_halt, 129472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .set_wedge = dwc3_gadget_ep_set_wedge, 129572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi}; 129672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 129772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic const struct usb_ep_ops dwc3_gadget_ep_ops = { 129872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .enable = dwc3_gadget_ep_enable, 129972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .disable = dwc3_gadget_ep_disable, 130072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .alloc_request = dwc3_gadget_ep_alloc_request, 130172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .free_request = dwc3_gadget_ep_free_request, 130272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .queue = dwc3_gadget_ep_queue, 130372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .dequeue = dwc3_gadget_ep_dequeue, 130472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .set_halt = dwc3_gadget_ep_set_halt, 130572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .set_wedge = dwc3_gadget_ep_set_wedge, 130672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi}; 130772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 130872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 130972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 131072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_get_frame(struct usb_gadget *g) 131172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 131272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 131372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 131472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 131572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 131672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return DWC3_DSTS_SOFFN(reg); 131772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 131872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 131972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_wakeup(struct usb_gadget *g) 132072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 132172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 132272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 132372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long timeout; 132472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 132572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 132672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 132772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 132872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret = 0; 132972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 133072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 link_state; 133172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 speed; 133272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 133372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 133472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 133572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 133672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * According to the Databook Remote wakeup request should 133772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * be issued only when the device is in early suspend state. 133872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 133972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We can check that via USB Link State bits in DSTS register. 134072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 134172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 134272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 134372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi speed = reg & DWC3_DSTS_CONNECTSPD; 134472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (speed == DWC3_DSTS_SUPERSPEED) { 134572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "no wakeup on SuperSpeed\n"); 134672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EINVAL; 134772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto out; 134872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 134972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 135072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi link_state = DWC3_DSTS_USBLNKST(reg); 135172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 135272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (link_state) { 135372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_LINK_STATE_RX_DET: /* in HS, means Early Suspend */ 135472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_LINK_STATE_U3: /* in HS, means SUSPEND */ 135572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 135672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 135772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "can't wakeup from link state %d\n", 135872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi link_state); 135972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EINVAL; 136072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto out; 136172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 136272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 13638598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi ret = dwc3_gadget_set_link_state(dwc, DWC3_LINK_STATE_RECOV); 13648598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi if (ret < 0) { 13658598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi dev_err(dwc->dev, "failed to put link in Recovery\n"); 13668598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi goto out; 13678598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi } 136872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1369802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman /* Recent versions do this automatically */ 1370802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman if (dwc->revision < DWC3_REVISION_194A) { 1371802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman /* write zeroes to Link Change Request */ 1372fcc023c726b5879d8f3f0f0f48c45d09055272c4Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 1373802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman reg &= ~DWC3_DCTL_ULSTCHNGREQ_MASK; 1374802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman dwc3_writel(dwc->regs, DWC3_DCTL, reg); 1375802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman } 137672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 13771d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman /* poll until Link State changes to ON */ 137872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi timeout = jiffies + msecs_to_jiffies(100); 137972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 13801d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman while (!time_after(jiffies, timeout)) { 138172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 138272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 138372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* in HS, means ON */ 138472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (DWC3_DSTS_USBLNKST(reg) == DWC3_LINK_STATE_U0) 138572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 138672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 138772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 138872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (DWC3_DSTS_USBLNKST(reg) != DWC3_LINK_STATE_U0) { 138972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to send remote wakeup\n"); 139072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EINVAL; 139172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 139272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 139372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiout: 139472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 139572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 139672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 139772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 139872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 139972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_set_selfpowered(struct usb_gadget *g, 140072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int is_selfpowered) 140172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 140272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 1403249a456930cd2df29d085fb738b0e8f4bc1680cfPaul Zimmerman unsigned long flags; 140472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1405249a456930cd2df29d085fb738b0e8f4bc1680cfPaul Zimmerman spin_lock_irqsave(&dwc->lock, flags); 140672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->is_selfpowered = !!is_selfpowered; 1407249a456930cd2df29d085fb738b0e8f4bc1680cfPaul Zimmerman spin_unlock_irqrestore(&dwc->lock, flags); 140872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 140972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 141072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 141172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 14127b2a0368bbc9bc4a7936d8587eaff4b8c35b2247Felipe Balbistatic int dwc3_gadget_run_stop(struct dwc3 *dwc, int is_on, int suspend) 141372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 141472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 141561d58242f634642de42d6a4098913b7254a65053Sebastian Andrzej Siewior u32 timeout = 500; 141672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 141772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 14188db7ed15f2557e26371e4b2d98fee290d992b715Felipe Balbi if (is_on) { 1419802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman if (dwc->revision <= DWC3_REVISION_187A) { 1420802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman reg &= ~DWC3_DCTL_TRGTULST_MASK; 1421802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman reg |= DWC3_DCTL_TRGTULST_RX_DET; 1422802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman } 1423802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman 1424802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman if (dwc->revision >= DWC3_REVISION_194A) 1425802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman reg &= ~DWC3_DCTL_KEEP_CONNECT; 1426802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman reg |= DWC3_DCTL_RUN_STOP; 14277b2a0368bbc9bc4a7936d8587eaff4b8c35b2247Felipe Balbi 14287b2a0368bbc9bc4a7936d8587eaff4b8c35b2247Felipe Balbi if (dwc->has_hibernation) 14297b2a0368bbc9bc4a7936d8587eaff4b8c35b2247Felipe Balbi reg |= DWC3_DCTL_KEEP_CONNECT; 14307b2a0368bbc9bc4a7936d8587eaff4b8c35b2247Felipe Balbi 14319fcb3bd8d12db29c101d3722d37ddef9d1915317Felipe Balbi dwc->pullups_connected = true; 14328db7ed15f2557e26371e4b2d98fee290d992b715Felipe Balbi } else { 143372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DCTL_RUN_STOP; 14347b2a0368bbc9bc4a7936d8587eaff4b8c35b2247Felipe Balbi 14357b2a0368bbc9bc4a7936d8587eaff4b8c35b2247Felipe Balbi if (dwc->has_hibernation && !suspend) 14367b2a0368bbc9bc4a7936d8587eaff4b8c35b2247Felipe Balbi reg &= ~DWC3_DCTL_KEEP_CONNECT; 14377b2a0368bbc9bc4a7936d8587eaff4b8c35b2247Felipe Balbi 14389fcb3bd8d12db29c101d3722d37ddef9d1915317Felipe Balbi dwc->pullups_connected = false; 14398db7ed15f2557e26371e4b2d98fee290d992b715Felipe Balbi } 144072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 144172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 144272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 144372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi do { 144472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 144572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (is_on) { 144672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(reg & DWC3_DSTS_DEVCTRLHLT)) 144772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 144872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 144972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (reg & DWC3_DSTS_DEVCTRLHLT) 145072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 145172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 145272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi timeout--; 145372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!timeout) 14546f17f74b3d8345663f5fcfd834145685110075bdPratyush Anand return -ETIMEDOUT; 145561d58242f634642de42d6a4098913b7254a65053Sebastian Andrzej Siewior udelay(1); 145672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } while (1); 145772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 145872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "gadget %s data soft-%s\n", 145972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver 146072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ? dwc->gadget_driver->function : "no-function", 146172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi is_on ? "connect" : "disconnect"); 14626f17f74b3d8345663f5fcfd834145685110075bdPratyush Anand 14636f17f74b3d8345663f5fcfd834145685110075bdPratyush Anand return 0; 146472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 146572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 146672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_pullup(struct usb_gadget *g, int is_on) 146772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 146872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 146972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 14706f17f74b3d8345663f5fcfd834145685110075bdPratyush Anand int ret; 147172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 147272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi is_on = !!is_on; 147372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 147472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 14757b2a0368bbc9bc4a7936d8587eaff4b8c35b2247Felipe Balbi ret = dwc3_gadget_run_stop(dwc, is_on, false); 147672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 147772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 14786f17f74b3d8345663f5fcfd834145685110075bdPratyush Anand return ret; 147972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 148072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 14818698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbistatic void dwc3_gadget_enable_irq(struct dwc3 *dwc) 14828698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi{ 14838698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi u32 reg; 14848698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi 14858698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi /* Enable all but Start and End of Frame IRQs */ 14868698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi reg = (DWC3_DEVTEN_VNDRDEVTSTRCVEDEN | 14878698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi DWC3_DEVTEN_EVNTOVERFLOWEN | 14888698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi DWC3_DEVTEN_CMDCMPLTEN | 14898698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi DWC3_DEVTEN_ERRTICERREN | 14908698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi DWC3_DEVTEN_WKUPEVTEN | 14918698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi DWC3_DEVTEN_ULSTCNGEN | 14928698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi DWC3_DEVTEN_CONNECTDONEEN | 14938698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi DWC3_DEVTEN_USBRSTEN | 14948698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi DWC3_DEVTEN_DISCONNEVTEN); 14958698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi 14968698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEVTEN, reg); 14978698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi} 14988698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi 14998698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbistatic void dwc3_gadget_disable_irq(struct dwc3 *dwc) 15008698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi{ 15018698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi /* mask all interrupts */ 15028698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEVTEN, 0x00); 15038698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi} 15048698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi 15058698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbistatic irqreturn_t dwc3_interrupt(int irq, void *_dwc); 1506b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbistatic irqreturn_t dwc3_thread_interrupt(int irq, void *_dwc); 15078698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi 150872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_start(struct usb_gadget *g, 150972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct usb_gadget_driver *driver) 151072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 151172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 151272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 151372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 151472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret = 0; 15158698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi int irq; 151672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 151772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1518b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi irq = platform_get_irq(to_platform_device(dwc->dev), 0); 1519b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi ret = request_threaded_irq(irq, dwc3_interrupt, dwc3_thread_interrupt, 1520e8adfc30ff9282a728fd8b666b6418308164c415Felipe Balbi IRQF_SHARED, "dwc3", dwc); 1521b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi if (ret) { 1522b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi dev_err(dwc->dev, "failed to request irq #%d --> %d\n", 1523b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi irq, ret); 1524b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi goto err0; 1525b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi } 1526b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi 152772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 152872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 152972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dwc->gadget_driver) { 153072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "%s is already bound to %s\n", 153172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.name, 153272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver->driver.name); 153372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EBUSY; 1534b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi goto err1; 153572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 153672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 153772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver = driver; 153872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 153972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCFG); 154072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~(DWC3_DCFG_SPEED_MASK); 154107e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi 154207e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi /** 154307e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * WORKAROUND: DWC3 revision < 2.20a have an issue 154407e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * which would cause metastability state on Run/Stop 154507e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * bit if we try to force the IP to USB2-only mode. 154607e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * 154707e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * Because of that, we cannot configure the IP to any 154807e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * speed other than the SuperSpeed 154907e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * 155007e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * Refers to: 155107e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * 155207e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * STAR#9000525659: Clock Domain Crossing on DCTL in 155307e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * USB 2.0 Mode 155407e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi */ 1555f7e846f0956917888b28b52726ee8779a39d84b6Felipe Balbi if (dwc->revision < DWC3_REVISION_220A) { 155607e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi reg |= DWC3_DCFG_SUPERSPEED; 1557f7e846f0956917888b28b52726ee8779a39d84b6Felipe Balbi } else { 1558f7e846f0956917888b28b52726ee8779a39d84b6Felipe Balbi switch (dwc->maximum_speed) { 1559f7e846f0956917888b28b52726ee8779a39d84b6Felipe Balbi case USB_SPEED_LOW: 1560f7e846f0956917888b28b52726ee8779a39d84b6Felipe Balbi reg |= DWC3_DSTS_LOWSPEED; 1561f7e846f0956917888b28b52726ee8779a39d84b6Felipe Balbi break; 1562f7e846f0956917888b28b52726ee8779a39d84b6Felipe Balbi case USB_SPEED_FULL: 1563f7e846f0956917888b28b52726ee8779a39d84b6Felipe Balbi reg |= DWC3_DSTS_FULLSPEED1; 1564f7e846f0956917888b28b52726ee8779a39d84b6Felipe Balbi break; 1565f7e846f0956917888b28b52726ee8779a39d84b6Felipe Balbi case USB_SPEED_HIGH: 1566f7e846f0956917888b28b52726ee8779a39d84b6Felipe Balbi reg |= DWC3_DSTS_HIGHSPEED; 1567f7e846f0956917888b28b52726ee8779a39d84b6Felipe Balbi break; 1568f7e846f0956917888b28b52726ee8779a39d84b6Felipe Balbi case USB_SPEED_SUPER: /* FALLTHROUGH */ 1569f7e846f0956917888b28b52726ee8779a39d84b6Felipe Balbi case USB_SPEED_UNKNOWN: /* FALTHROUGH */ 1570f7e846f0956917888b28b52726ee8779a39d84b6Felipe Balbi default: 1571f7e846f0956917888b28b52726ee8779a39d84b6Felipe Balbi reg |= DWC3_DSTS_SUPERSPEED; 1572f7e846f0956917888b28b52726ee8779a39d84b6Felipe Balbi } 1573f7e846f0956917888b28b52726ee8779a39d84b6Felipe Balbi } 157472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCFG, reg); 157572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1576b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman dwc->start_config_issued = false; 1577b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman 157872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* Start with SuperSpeed Default */ 157972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(512); 158072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 158172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[0]; 1582265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL, false, 1583265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman false); 158472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 158572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to enable %s\n", dep->name); 1586b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi goto err2; 158772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 158872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 158972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[1]; 1590265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL, false, 1591265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman false); 159272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 159372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to enable %s\n", dep->name); 1594b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi goto err3; 159572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 159672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 159772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* begin to receive SETUP packets */ 1598c7fcdeb2627c46b7ec3f0bcb2054b10405f9a70eFelipe Balbi dwc->ep0state = EP0_SETUP_PHASE; 159972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_ep0_out_start(dwc); 160072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 16018698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi dwc3_gadget_enable_irq(dwc); 16028698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi 160372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 160472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 160572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 160672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1607b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbierr3: 160872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi __dwc3_gadget_ep_disable(dwc->eps[0]); 160972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1610b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbierr2: 1611cdcedd6981194e511cc206887db661d016069d68Felipe Balbi dwc->gadget_driver = NULL; 1612b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi 1613b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbierr1: 161472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 161572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1616b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi free_irq(irq, dwc); 1617b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi 1618b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbierr0: 161972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 162072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 162172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 162272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_stop(struct usb_gadget *g, 162372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct usb_gadget_driver *driver) 162472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 162572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 162672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 16278698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi int irq; 162872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 162972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 163072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 16318698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi dwc3_gadget_disable_irq(dwc); 163272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi __dwc3_gadget_ep_disable(dwc->eps[0]); 163372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi __dwc3_gadget_ep_disable(dwc->eps[1]); 163472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 163572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver = NULL; 163672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 163772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 163872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1639b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi irq = platform_get_irq(to_platform_device(dwc->dev), 0); 1640b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi free_irq(irq, dwc); 1641b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi 164272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 164372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 1644802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman 164572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic const struct usb_gadget_ops dwc3_gadget_ops = { 164672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .get_frame = dwc3_gadget_get_frame, 164772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .wakeup = dwc3_gadget_wakeup, 164872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .set_selfpowered = dwc3_gadget_set_selfpowered, 164972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .pullup = dwc3_gadget_pullup, 165072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .udc_start = dwc3_gadget_start, 165172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .udc_stop = dwc3_gadget_stop, 165272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi}; 165372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 165472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 165572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 16566a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbistatic int dwc3_gadget_init_hw_endpoints(struct dwc3 *dwc, 16576a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi u8 num, u32 direction) 165872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 165972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 16606a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi u8 i; 166172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 16626a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi for (i = 0; i < num; i++) { 16636a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi u8 epnum = (i << 1) | (!!direction); 166472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 166572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = kzalloc(sizeof(*dep), GFP_KERNEL); 166672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dep) { 166772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "can't allocate endpoint %d\n", 166872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi epnum); 166972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -ENOMEM; 167072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 167172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 167272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->dwc = dwc; 167372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->number = epnum; 16749aa62ae4292a2450634345d79a7fa1461bf7b39cFelipe Balbi dep->direction = !!direction; 167572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->eps[epnum] = dep; 167672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 167772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi snprintf(dep->name, sizeof(dep->name), "ep%d%s", epnum >> 1, 167872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi (epnum & 1) ? "in" : "out"); 16796a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi 168072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->endpoint.name = dep->name; 168172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1682653df35e6b3c0df875999a9b842327301269f55dFelipe Balbi dev_vdbg(dwc->dev, "initializing %s\n", dep->name); 1683653df35e6b3c0df875999a9b842327301269f55dFelipe Balbi 168472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (epnum == 0 || epnum == 1) { 1685e117e742d310683b410951faeab4b13b6c3c609fRobert Baldyga usb_ep_set_maxpacket_limit(&dep->endpoint, 512); 16866048e4c69d80600baba35856651056860d5d8f5aPratyush Anand dep->endpoint.maxburst = 1; 168772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->endpoint.ops = &dwc3_gadget_ep0_ops; 168872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!epnum) 168972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ep0 = &dep->endpoint; 169072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 169172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 169272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1693e117e742d310683b410951faeab4b13b6c3c609fRobert Baldyga usb_ep_set_maxpacket_limit(&dep->endpoint, 1024); 169412d36c16bde3ee0643d705caa87723de536dbe49Sebastian Andrzej Siewior dep->endpoint.max_streams = 15; 169572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->endpoint.ops = &dwc3_gadget_ep_ops; 169672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_add_tail(&dep->endpoint.ep_list, 169772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi &dwc->gadget.ep_list); 169872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 169972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_alloc_trb_pool(dep); 170025b8ff68bf1d4954d4a9dcb4862c6b6a53cb09e2Felipe Balbi if (ret) 170172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 170272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 170325b8ff68bf1d4954d4a9dcb4862c6b6a53cb09e2Felipe Balbi 170472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi INIT_LIST_HEAD(&dep->request_list); 170572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi INIT_LIST_HEAD(&dep->req_queued); 170672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 170772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 170872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 170972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 171072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 17116a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbistatic int dwc3_gadget_init_endpoints(struct dwc3 *dwc) 17126a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi{ 17136a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi int ret; 17146a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi 17156a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi INIT_LIST_HEAD(&dwc->gadget.ep_list); 17166a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi 17176a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi ret = dwc3_gadget_init_hw_endpoints(dwc, dwc->num_out_eps, 0); 17186a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi if (ret < 0) { 17196a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi dev_vdbg(dwc->dev, "failed to allocate OUT endpoints\n"); 17206a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi return ret; 17216a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi } 17226a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi 17236a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi ret = dwc3_gadget_init_hw_endpoints(dwc, dwc->num_in_eps, 1); 17246a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi if (ret < 0) { 17256a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi dev_vdbg(dwc->dev, "failed to allocate IN endpoints\n"); 17266a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi return ret; 17276a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi } 17286a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi 17296a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi return 0; 17306a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi} 17316a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi 173272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_free_endpoints(struct dwc3 *dwc) 173372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 173472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 173572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 epnum; 173672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 173772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi for (epnum = 0; epnum < DWC3_ENDPOINTS_NUM; epnum++) { 173872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[epnum]; 17396a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi if (!dep) 17406a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi continue; 17415bf8fae33d14cc5c3c53a926f9079f92c8b082b0George Cherian /* 17425bf8fae33d14cc5c3c53a926f9079f92c8b082b0George Cherian * Physical endpoints 0 and 1 are special; they form the 17435bf8fae33d14cc5c3c53a926f9079f92c8b082b0George Cherian * bi-directional USB endpoint 0. 17445bf8fae33d14cc5c3c53a926f9079f92c8b082b0George Cherian * 17455bf8fae33d14cc5c3c53a926f9079f92c8b082b0George Cherian * For those two physical endpoints, we don't allocate a TRB 17465bf8fae33d14cc5c3c53a926f9079f92c8b082b0George Cherian * pool nor do we add them the endpoints list. Due to that, we 17475bf8fae33d14cc5c3c53a926f9079f92c8b082b0George Cherian * shouldn't do these two operations otherwise we would end up 17485bf8fae33d14cc5c3c53a926f9079f92c8b082b0George Cherian * with all sorts of bugs when removing dwc3.ko. 17495bf8fae33d14cc5c3c53a926f9079f92c8b082b0George Cherian */ 17505bf8fae33d14cc5c3c53a926f9079f92c8b082b0George Cherian if (epnum != 0 && epnum != 1) { 17515bf8fae33d14cc5c3c53a926f9079f92c8b082b0George Cherian dwc3_free_trb_pool(dep); 175272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_del(&dep->endpoint.ep_list); 17535bf8fae33d14cc5c3c53a926f9079f92c8b082b0George Cherian } 175472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 175572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi kfree(dep); 175672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 175772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 175872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 175972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 1760e5caff6831d00d96b4618de939312570527ad54aFelipe Balbi 1761e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anandstatic int __dwc3_cleanup_done_trbs(struct dwc3 *dwc, struct dwc3_ep *dep, 1762e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand struct dwc3_request *req, struct dwc3_trb *trb, 176372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct dwc3_event_depevt *event, int status) 176472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 176572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned int count; 176672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned int s_pkt = 0; 1767d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand unsigned int trb_status; 176872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1769e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if ((trb->ctrl & DWC3_TRB_CTRL_HWO) && status != -ESHUTDOWN) 1770e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand /* 1771e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * We continue despite the error. There is not much we 1772e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * can do. If we don't clean it up we loop forever. If 1773e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * we skip the TRB then it gets overwritten after a 1774e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * while since we use them in a ring buffer. A BUG() 1775e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * would help. Lets hope that if this occurs, someone 1776e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * fixes the root cause instead of looking away :) 1777e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand */ 1778e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand dev_err(dwc->dev, "%s's TRB (%p) still owned by HW\n", 1779e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand dep->name, trb); 1780e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand count = trb->size & DWC3_TRB_SIZE_MASK; 1781e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand 1782e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if (dep->direction) { 1783e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if (count) { 1784e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand trb_status = DWC3_TRB_SIZE_TRBSTS(trb->size); 1785e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if (trb_status == DWC3_TRBSTS_MISSED_ISOC) { 1786e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand dev_dbg(dwc->dev, "incomplete IN transfer %s\n", 1787e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand dep->name); 1788e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand /* 1789e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * If missed isoc occurred and there is 1790e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * no request queued then issue END 1791e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * TRANSFER, so that core generates 1792e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * next xfernotready and we will issue 1793e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * a fresh START TRANSFER. 1794e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * If there are still queued request 1795e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * then wait, do not issue either END 1796e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * or UPDATE TRANSFER, just attach next 1797e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * request in request_list during 1798e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * giveback.If any future queued request 1799e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * is successfully transferred then we 1800e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * will issue UPDATE TRANSFER for all 1801e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * request in the request_list. 1802e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand */ 1803e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand dep->flags |= DWC3_EP_MISSED_ISOC; 1804e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand } else { 1805e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand dev_err(dwc->dev, "incomplete IN transfer %s\n", 1806e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand dep->name); 1807e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand status = -ECONNRESET; 1808e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand } 1809e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand } else { 1810e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand dep->flags &= ~DWC3_EP_MISSED_ISOC; 1811e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand } 1812e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand } else { 1813e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if (count && (event->status & DEPEVT_STATUS_SHORT)) 1814e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand s_pkt = 1; 1815e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand } 1816e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand 1817e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand /* 1818e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * We assume here we will always receive the entire data block 1819e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * which we should receive. Meaning, if we program RX to 1820e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * receive 4K but we receive only 2K, we assume that's all we 1821e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * should receive and we simply bounce the request back to the 1822e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * gadget driver for further processing. 1823e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand */ 1824e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand req->request.actual += req->request.length - count; 1825e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if (s_pkt) 1826e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand return 1; 1827e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if ((event->status & DEPEVT_STATUS_LST) && 1828e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand (trb->ctrl & (DWC3_TRB_CTRL_LST | 1829e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand DWC3_TRB_CTRL_HWO))) 1830e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand return 1; 1831e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if ((event->status & DEPEVT_STATUS_IOC) && 1832e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand (trb->ctrl & DWC3_TRB_CTRL_IOC)) 1833e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand return 1; 1834e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand return 0; 1835e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand} 1836e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand 1837e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anandstatic int dwc3_cleanup_done_reqs(struct dwc3 *dwc, struct dwc3_ep *dep, 1838e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand const struct dwc3_event_depevt *event, int status) 1839e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand{ 1840e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand struct dwc3_request *req; 1841e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand struct dwc3_trb *trb; 1842e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand unsigned int slot; 1843e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand unsigned int i; 1844e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand int ret; 1845e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand 184672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi do { 184772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req = next_request(&dep->req_queued); 1848d39ee7be2aaf0a53d7b5f43c13571bac95f7cc0cSebastian Andrzej Siewior if (!req) { 1849d39ee7be2aaf0a53d7b5f43c13571bac95f7cc0cSebastian Andrzej Siewior WARN_ON_ONCE(1); 1850d39ee7be2aaf0a53d7b5f43c13571bac95f7cc0cSebastian Andrzej Siewior return 1; 1851d39ee7be2aaf0a53d7b5f43c13571bac95f7cc0cSebastian Andrzej Siewior } 1852e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand i = 0; 1853e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand do { 1854e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand slot = req->start_slot + i; 1855e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if ((slot == DWC3_TRB_NUM - 1) && 1856e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand usb_endpoint_xfer_isoc(dep->endpoint.desc)) 1857e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand slot++; 1858e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand slot %= DWC3_TRB_NUM; 1859e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand trb = &dep->trb_pool[slot]; 186072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1861e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand ret = __dwc3_cleanup_done_trbs(dwc, dep, req, trb, 1862e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand event, status); 1863e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if (ret) 1864e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand break; 1865e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand }while (++i < req->request.num_mapped_sgs); 186672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 186772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_giveback(dep, req, status); 1868e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand 1869e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if (ret) 187072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 187172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } while (1); 187272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1873cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand if (usb_endpoint_xfer_isoc(dep->endpoint.desc) && 1874cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand list_empty(&dep->req_queued)) { 1875cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand if (list_empty(&dep->request_list)) { 1876cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand /* 1877cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand * If there is no entry in request list then do 1878cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand * not issue END TRANSFER now. Just set PENDING 1879cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand * flag, so that END TRANSFER is issued when an 1880cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand * entry is added into request list. 1881cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand */ 1882cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand dep->flags = DWC3_EP_PENDING_REQUEST; 1883cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand } else { 1884cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand dwc3_stop_active_transfer(dwc, dep->number); 1885cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand dep->flags = DWC3_EP_ENABLED; 1886cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand } 18877efea86c2868b8fd9df65e589e33aebe498ce21dPratyush Anand return 1; 18887efea86c2868b8fd9df65e589e33aebe498ce21dPratyush Anand } 18897efea86c2868b8fd9df65e589e33aebe498ce21dPratyush Anand 189072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 1; 189172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 189272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 189372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_endpoint_transfer_complete(struct dwc3 *dwc, 189472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep, const struct dwc3_event_depevt *event, 189572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int start_new) 189672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 189772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned status = 0; 189872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int clean_busy; 189972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 190072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (event->status & DEPEVT_STATUS_BUSERR) 190172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi status = -ECONNRESET; 190272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 19031d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman clean_busy = dwc3_cleanup_done_reqs(dwc, dep, event, status); 1904c2df85ca31645ed3c68c56bd30a3673e034224f1Paul Zimmerman if (clean_busy) 190572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags &= ~DWC3_EP_BUSY; 1906fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1907fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi /* 1908fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * WORKAROUND: This is the 2nd half of U1/U2 -> U0 workaround. 1909fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * See dwc3_gadget_linksts_change_interrupt() for 1st half. 1910fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi */ 1911fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi if (dwc->revision < DWC3_REVISION_183A) { 1912fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi u32 reg; 1913fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi int i; 1914fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1915fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi for (i = 0; i < DWC3_ENDPOINTS_NUM; i++) { 1916348e026fafe2501281db5fb7fed599b337cad358Moiz Sonasath dep = dwc->eps[i]; 1917fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1918fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) 1919fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi continue; 1920fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1921fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi if (!list_empty(&dep->req_queued)) 1922fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi return; 1923fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi } 1924fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1925fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 1926fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi reg |= dwc->u1u2; 1927fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 1928fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1929fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi dwc->u1u2 = 0; 1930fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi } 193172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 193272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 193372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_endpoint_interrupt(struct dwc3 *dwc, 193472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct dwc3_event_depevt *event) 193572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 193672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 193772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 epnum = event->endpoint_number; 193872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 193972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[epnum]; 194072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 19413336abb5b608300550136ddab7a7101b30d45fa7Felipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) 19423336abb5b608300550136ddab7a7101b30d45fa7Felipe Balbi return; 19433336abb5b608300550136ddab7a7101b30d45fa7Felipe Balbi 194472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s: %s\n", dep->name, 194572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_ep_event_string(event->endpoint_event)); 194672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 194772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (epnum == 0 || epnum == 1) { 194872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_ep0_interrupt(dwc, event); 194972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 195072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 195172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 195272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (event->endpoint_event) { 195372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPEVT_XFERCOMPLETE: 1954b4996a8631e80a2aaddb5c487ff6b9ad37315f70Felipe Balbi dep->resource_index = 0; 1955c2df85ca31645ed3c68c56bd30a3673e034224f1Paul Zimmerman 195616e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if (usb_endpoint_xfer_isoc(dep->endpoint.desc)) { 195772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "%s is an Isochronous endpoint\n", 195872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 195972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 196072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 196172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 196272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_endpoint_transfer_complete(dwc, dep, event, 1); 196372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 196472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPEVT_XFERINPROGRESS: 196516e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if (!usb_endpoint_xfer_isoc(dep->endpoint.desc)) { 196672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "%s is not an Isochronous endpoint\n", 196772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 196872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 196972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 197072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 197172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_endpoint_transfer_complete(dwc, dep, event, 0); 197272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 197372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPEVT_XFERNOTREADY: 197416e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if (usb_endpoint_xfer_isoc(dep->endpoint.desc)) { 197572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_start_isoc(dwc, dep, event); 197672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 197772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 197872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 197972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s: reason %s\n", 198040aa41fba348bc5bd19ff5bcf2b03d67bb01d1ceFelipe Balbi dep->name, event->status & 198140aa41fba348bc5bd19ff5bcf2b03d67bb01d1ceFelipe Balbi DEPEVT_STATUS_TRANSFER_ACTIVE 198272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ? "Transfer Active" 198372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi : "Transfer Not Active"); 198472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 198572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = __dwc3_gadget_kick_transfer(dep, 0, 1); 198672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!ret || ret == -EBUSY) 198772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 198872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 198972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "%s: failed to kick transfers\n", 199072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 199172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 199272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 199372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 1994879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi case DWC3_DEPEVT_STREAMEVT: 199516e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if (!usb_endpoint_xfer_bulk(dep->endpoint.desc)) { 1996879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dev_err(dwc->dev, "Stream event for non-Bulk %s\n", 1997879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dep->name); 1998879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi return; 1999879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi } 2000879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi 2001879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi switch (event->status) { 2002879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi case DEPEVT_STREAMEVT_FOUND: 2003879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dev_vdbg(dwc->dev, "Stream %d found and started\n", 2004879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi event->parameters); 2005879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi 2006879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi break; 2007879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi case DEPEVT_STREAMEVT_NOTFOUND: 2008879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi /* FALLTHROUGH */ 2009879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi default: 2010879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dev_dbg(dwc->dev, "Couldn't find suitable stream\n"); 2011879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi } 2012879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi break; 201372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPEVT_RXTXFIFOEVT: 201472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "%s FIFO Overrun\n", dep->name); 201572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 201672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPEVT_EPCMDCMPLT: 2017ea53b8828c50b7a5138a8931c41b2671682c86b5Felipe Balbi dev_vdbg(dwc->dev, "Endpoint Command Complete\n"); 201872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 201972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 202072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 202172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 202272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_disconnect_gadget(struct dwc3 *dwc) 202372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 202472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dwc->gadget_driver && dwc->gadget_driver->disconnect) { 202572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock(&dwc->lock); 202672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver->disconnect(&dwc->gadget); 202772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock(&dwc->lock); 202872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 202972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 203072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 203172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_stop_active_transfer(struct dwc3 *dwc, u32 epnum) 203272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 203372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 203472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 203572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 cmd; 203672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 203772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 203872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[epnum]; 203972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 2040b4996a8631e80a2aaddb5c487ff6b9ad37315f70Felipe Balbi if (!dep->resource_index) 20413daf74d78dfcd552445c35f1b82a271ca305ceb9Pratyush Anand return; 20423daf74d78dfcd552445c35f1b82a271ca305ceb9Pratyush Anand 204357911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand /* 204457911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * NOTICE: We are violating what the Databook says about the 204557911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * EndTransfer command. Ideally we would _always_ wait for the 204657911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * EndTransfer Command Completion IRQ, but that's causing too 204757911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * much trouble synchronizing between us and gadget driver. 204857911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * 204957911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * We have discussed this with the IP Provider and it was 205057911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * suggested to giveback all requests here, but give HW some 205157911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * extra time to synchronize with the interconnect. We're using 205257911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * an arbitraty 100us delay for that. 205357911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * 205457911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * Note also that a similar handling was tested by Synopsys 205557911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * (thanks a lot Paul) and nothing bad has come out of it. 205657911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * In short, what we're doing is: 205757911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * 205857911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * - Issue EndTransfer WITH CMDIOC bit set 205957911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * - Wait 100us 206057911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand */ 206157911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand 20623daf74d78dfcd552445c35f1b82a271ca305ceb9Pratyush Anand cmd = DWC3_DEPCMD_ENDTRANSFER; 20633daf74d78dfcd552445c35f1b82a271ca305ceb9Pratyush Anand cmd |= DWC3_DEPCMD_HIPRI_FORCERM | DWC3_DEPCMD_CMDIOC; 2064b4996a8631e80a2aaddb5c487ff6b9ad37315f70Felipe Balbi cmd |= DWC3_DEPCMD_PARAM(dep->resource_index); 20653daf74d78dfcd552445c35f1b82a271ca305ceb9Pratyush Anand memset(¶ms, 0, sizeof(params)); 20663daf74d78dfcd552445c35f1b82a271ca305ceb9Pratyush Anand ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, cmd, ¶ms); 20673daf74d78dfcd552445c35f1b82a271ca305ceb9Pratyush Anand WARN_ON_ONCE(ret); 2068b4996a8631e80a2aaddb5c487ff6b9ad37315f70Felipe Balbi dep->resource_index = 0; 2069041d81f493d90c940ec41f0ec98bc7c4f2fba431Felipe Balbi dep->flags &= ~DWC3_EP_BUSY; 207057911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand udelay(100); 207172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 207272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 207372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_stop_active_transfers(struct dwc3 *dwc) 207472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 207572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 epnum; 207672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 207772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi for (epnum = 2; epnum < DWC3_ENDPOINTS_NUM; epnum++) { 207872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 207972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 208072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[epnum]; 20816a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi if (!dep) 20826a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi continue; 20836a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi 208472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) 208572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi continue; 208672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 2087624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior dwc3_remove_requests(dwc, dep); 208872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 208972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 209072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 209172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_clear_stall_all_ep(struct dwc3 *dwc) 209272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 209372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 epnum; 209472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 209572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi for (epnum = 1; epnum < DWC3_ENDPOINTS_NUM; epnum++) { 209672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 209772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 209872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 209972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 210072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[epnum]; 21016a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi if (!dep) 21026a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi continue; 210372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 210472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(dep->flags & DWC3_EP_STALL)) 210572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi continue; 210672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 210772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags &= ~DWC3_EP_STALL; 210872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 210972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0, sizeof(params)); 211072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, 211172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEPCMD_CLEARSTALL, ¶ms); 211272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi WARN_ON_ONCE(ret); 211372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 211472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 211572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 211672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_disconnect_interrupt(struct dwc3 *dwc) 211772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 2118c4430a26948b84c0d820e83f8c640229f960d3b6Felipe Balbi int reg; 2119c4430a26948b84c0d820e83f8c640229f960d3b6Felipe Balbi 212072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s\n", __func__); 212172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 212272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 212372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DCTL_INITU1ENA; 212472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 212572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 212672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DCTL_INITU2ENA; 212772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 212872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 212972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_disconnect_gadget(dwc); 2130b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman dwc->start_config_issued = false; 213172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 213272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_UNKNOWN; 2133df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi dwc->setup_packet_pending = false; 213472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 213572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 213672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_reset_interrupt(struct dwc3 *dwc) 213772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 213872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 213972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 214072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s\n", __func__); 214172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 2142df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi /* 2143df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * WORKAROUND: DWC3 revisions <1.88a have an issue which 2144df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * would cause a missing Disconnect Event if there's a 2145df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * pending Setup Packet in the FIFO. 2146df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * 2147df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * There's no suggested workaround on the official Bug 2148df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * report, which states that "unless the driver/application 2149df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * is doing any special handling of a disconnect event, 2150df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * there is no functional issue". 2151df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * 2152df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * Unfortunately, it turns out that we _do_ some special 2153df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * handling of a disconnect event, namely complete all 2154df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * pending transfers, notify gadget driver of the 2155df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * disconnection, and so on. 2156df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * 2157df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * Our suggested workaround is to follow the Disconnect 2158df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * Event steps here, instead, based on a setup_packet_pending 2159df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * flag. Such flag gets set whenever we have a XferNotReady 2160df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * event on EP0 and gets cleared on XferComplete for the 2161df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * same endpoint. 2162df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * 2163df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * Refers to: 2164df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * 2165df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * STAR#9000466709: RTL: Device : Disconnect event not 2166df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * generated if setup packet pending in FIFO 2167df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi */ 2168df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi if (dwc->revision < DWC3_REVISION_188A) { 2169df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi if (dwc->setup_packet_pending) 2170df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi dwc3_gadget_disconnect_interrupt(dwc); 2171df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi } 2172df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi 2173961906edb549c95f4cc33e4f3dbfd0fcc364954dFelipe Balbi /* after reset -> Default State */ 217414cd592f72ea1ce1a25d7a576a5ed6aa761456bcFelipe Balbi usb_gadget_set_state(&dwc->gadget, USB_STATE_DEFAULT); 2175961906edb549c95f4cc33e4f3dbfd0fcc364954dFelipe Balbi 217672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dwc->gadget.speed != USB_SPEED_UNKNOWN) 217772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_disconnect_gadget(dwc); 217872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 217972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 218072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DCTL_TSTCTRL_MASK; 218172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 21823b637367ae40b6d3c20e30cb0cdd059e67bbf848Gerard Cauvy dwc->test_mode = false; 218372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 218472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_stop_active_transfers(dwc); 218572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_clear_stall_all_ep(dwc); 2186b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman dwc->start_config_issued = false; 218772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 218872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* Reset device address to zero */ 218972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCFG); 219072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~(DWC3_DCFG_DEVADDR_MASK); 219172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCFG, reg); 219272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 219372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 219472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_update_ram_clk_sel(struct dwc3 *dwc, u32 speed) 219572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 219672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 219772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 usb30_clock = DWC3_GCTL_CLK_BUS; 219872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 219972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 220072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We change the clock only at SS but I dunno why I would want to do 220172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * this. Maybe it becomes part of the power saving plan. 220272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 220372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 220472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (speed != DWC3_DSTS_SUPERSPEED) 220572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 220672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 220772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 220872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * RAMClkSel is reset to 0 after USB reset, so it must be reprogrammed 220972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * each time on Connect Done. 221072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 221172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!usb30_clock) 221272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 221372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 221472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_GCTL); 221572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg |= DWC3_GCTL_RAMCLKSEL(usb30_clock); 221672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_GCTL, reg); 221772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 221872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 221972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_conndone_interrupt(struct dwc3 *dwc) 222072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 222172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 222272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 222372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 222472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 speed; 222572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 222672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s\n", __func__); 222772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 222872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 222972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi speed = reg & DWC3_DSTS_CONNECTSPD; 223072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->speed = speed; 223172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 223272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_update_ram_clk_sel(dwc, speed); 223372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 223472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (speed) { 223572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DCFG_SUPERSPEED: 223605870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi /* 223705870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * WORKAROUND: DWC3 revisions <1.90a have an issue which 223805870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * would cause a missing USB3 Reset event. 223905870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * 224005870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * In such situations, we should force a USB3 Reset 224105870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * event by calling our dwc3_gadget_reset_interrupt() 224205870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * routine. 224305870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * 224405870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * Refers to: 224505870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * 224605870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * STAR#9000483510: RTL: SS : USB3 reset event may 224705870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * not be generated always when the link enters poll 224805870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi */ 224905870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi if (dwc->revision < DWC3_REVISION_190A) 225005870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi dwc3_gadget_reset_interrupt(dwc); 225105870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi 225272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(512); 225372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ep0->maxpacket = 512; 225472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_SUPER; 225572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 225672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DCFG_HIGHSPEED: 225772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(64); 225872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ep0->maxpacket = 64; 225972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_HIGH; 226072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 226172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DCFG_FULLSPEED2: 226272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DCFG_FULLSPEED1: 226372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(64); 226472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ep0->maxpacket = 64; 226572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_FULL; 226672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 226772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DCFG_LOWSPEED: 226872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(8); 226972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ep0->maxpacket = 8; 227072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_LOW; 227172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 227272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 227372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 22742b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand /* Enable USB2 LPM Capability */ 22752b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand 22762b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand if ((dwc->revision > DWC3_REVISION_194A) 22772b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand && (speed != DWC3_DCFG_SUPERSPEED)) { 22782b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand reg = dwc3_readl(dwc->regs, DWC3_DCFG); 22792b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand reg |= DWC3_DCFG_LPM_CAP; 22802b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand dwc3_writel(dwc->regs, DWC3_DCFG, reg); 22812b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand 22822b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand reg = dwc3_readl(dwc->regs, DWC3_DCTL); 22832b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand reg &= ~(DWC3_DCTL_HIRD_THRES_MASK | DWC3_DCTL_L1_HIBER_EN); 22842b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand 22851a947746dbe1486d0e305ab512ddf085b7874cb3Felipe Balbi /* 22861a947746dbe1486d0e305ab512ddf085b7874cb3Felipe Balbi * TODO: This should be configurable. For now using 22871a947746dbe1486d0e305ab512ddf085b7874cb3Felipe Balbi * maximum allowed HIRD threshold value of 0b1100 22881a947746dbe1486d0e305ab512ddf085b7874cb3Felipe Balbi */ 22891a947746dbe1486d0e305ab512ddf085b7874cb3Felipe Balbi reg |= DWC3_DCTL_HIRD_THRES(12); 22902b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand 22912b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand dwc3_writel(dwc->regs, DWC3_DCTL, reg); 22922b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand } 22932b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand 229472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[0]; 2295265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL, true, 2296265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman false); 229772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 229872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to enable %s\n", dep->name); 229972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 230072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 230172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 230272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[1]; 2303265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL, true, 2304265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman false); 230572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 230672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to enable %s\n", dep->name); 230772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 230872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 230972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 231072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 231172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Configure PHY via GUSB3PIPECTLn if required. 231272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 231372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Update GTXFIFOSIZn 231472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 231572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * In both cases reset values should be sufficient. 231672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 231772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 231872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 231972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_wakeup_interrupt(struct dwc3 *dwc) 232072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 232172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s\n", __func__); 232272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 232372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 232472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * TODO take core out of low power mode when that's 232572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * implemented. 232672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 232772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 232872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver->resume(&dwc->gadget); 232972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 233072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 233172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_linksts_change_interrupt(struct dwc3 *dwc, 233272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned int evtinfo) 233372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 2334fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi enum dwc3_link_state next = evtinfo & DWC3_LINK_STATE_MASK; 23350b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi unsigned int pwropt; 23360b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi 23370b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi /* 23380b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi * WORKAROUND: DWC3 < 2.50a have an issue when configured without 23390b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi * Hibernation mode enabled which would show up when device detects 23400b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi * host-initiated U3 exit. 23410b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi * 23420b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi * In that case, device will generate a Link State Change Interrupt 23430b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi * from U3 to RESUME which is only necessary if Hibernation is 23440b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi * configured in. 23450b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi * 23460b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi * There are no functional changes due to such spurious event and we 23470b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi * just need to ignore it. 23480b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi * 23490b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi * Refers to: 23500b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi * 23510b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi * STAR#9000570034 RTL: SS Resume event generated in non-Hibernation 23520b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi * operational mode 23530b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi */ 23540b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi pwropt = DWC3_GHWPARAMS1_EN_PWROPT(dwc->hwparams.hwparams1); 23550b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi if ((dwc->revision < DWC3_REVISION_250A) && 23560b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi (pwropt != DWC3_GHWPARAMS1_EN_PWROPT_HIB)) { 23570b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi if ((dwc->link_state == DWC3_LINK_STATE_U3) && 23580b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi (next == DWC3_LINK_STATE_RESUME)) { 23590b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi dev_vdbg(dwc->dev, "ignoring transition U3 -> Resume\n"); 23600b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi return; 23610b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi } 23620b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi } 2363fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 2364fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi /* 2365fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * WORKAROUND: DWC3 Revisions <1.83a have an issue which, depending 2366fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * on the link partner, the USB session might do multiple entry/exit 2367fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * of low power states before a transfer takes place. 2368fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * 2369fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * Due to this problem, we might experience lower throughput. The 2370fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * suggested workaround is to disable DCTL[12:9] bits if we're 2371fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * transitioning from U1/U2 to U0 and enable those bits again 2372fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * after a transfer completes and there are no pending transfers 2373fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * on any of the enabled endpoints. 2374fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * 2375fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * This is the first half of that workaround. 2376fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * 2377fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * Refers to: 2378fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * 2379fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * STAR#9000446952: RTL: Device SS : if U1/U2 ->U0 takes >128us 2380fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * core send LGO_Ux entering U0 2381fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi */ 2382fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi if (dwc->revision < DWC3_REVISION_183A) { 2383fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi if (next == DWC3_LINK_STATE_U0) { 2384fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi u32 u1u2; 2385fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi u32 reg; 2386fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 2387fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi switch (dwc->link_state) { 2388fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi case DWC3_LINK_STATE_U1: 2389fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi case DWC3_LINK_STATE_U2: 2390fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 2391fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi u1u2 = reg & (DWC3_DCTL_INITU2ENA 2392fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi | DWC3_DCTL_ACCEPTU2ENA 2393fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi | DWC3_DCTL_INITU1ENA 2394fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi | DWC3_DCTL_ACCEPTU1ENA); 2395fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 2396fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi if (!dwc->u1u2) 2397fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi dwc->u1u2 = reg & u1u2; 2398fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 2399fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi reg &= ~u1u2; 2400fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 2401fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 2402fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi break; 2403fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi default: 2404fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi /* do nothing */ 2405fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi break; 2406fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi } 2407fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi } 2408fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi } 2409fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 2410fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi dwc->link_state = next; 2411019ac83252dc2b356cb0ca81c25a077ec90309e7Felipe Balbi 2412019ac83252dc2b356cb0ca81c25a077ec90309e7Felipe Balbi dev_vdbg(dwc->dev, "%s link %d\n", __func__, dwc->link_state); 241372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 241472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 2415e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbistatic void dwc3_gadget_hibernation_interrupt(struct dwc3 *dwc, 2416e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi unsigned int evtinfo) 2417e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi{ 2418e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi unsigned int is_ss = evtinfo & BIT(4); 2419e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi 2420e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi /** 2421e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi * WORKAROUND: DWC3 revison 2.20a with hibernation support 2422e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi * have a known issue which can cause USB CV TD.9.23 to fail 2423e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi * randomly. 2424e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi * 2425e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi * Because of this issue, core could generate bogus hibernation 2426e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi * events which SW needs to ignore. 2427e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi * 2428e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi * Refers to: 2429e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi * 2430e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi * STAR#9000546576: Device Mode Hibernation: Issue in USB 2.0 2431e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi * Device Fallback from SuperSpeed 2432e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi */ 2433e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi if (is_ss ^ (dwc->speed == USB_SPEED_SUPER)) 2434e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi return; 2435e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi 2436e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi /* enter hibernation here */ 2437e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi} 2438e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi 243972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_interrupt(struct dwc3 *dwc, 244072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct dwc3_event_devt *event) 244172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 244272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (event->type) { 244372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_DISCONNECT: 244472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_disconnect_interrupt(dwc); 244572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 244672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_RESET: 244772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_reset_interrupt(dwc); 244872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 244972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_CONNECT_DONE: 245072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_conndone_interrupt(dwc); 245172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 245272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_WAKEUP: 245372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_wakeup_interrupt(dwc); 245472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 2455e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi case DWC3_DEVICE_EVENT_HIBER_REQ: 2456e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi if (dev_WARN_ONCE(dwc->dev, !dwc->has_hibernation, 2457e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi "unexpected hibernation event\n")) 2458e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi break; 2459e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi 2460e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi dwc3_gadget_hibernation_interrupt(dwc, event->event_info); 2461e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi break; 246272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_LINK_STATUS_CHANGE: 246372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_linksts_change_interrupt(dwc, event->event_info); 246472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 246572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_EOPF: 246672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "End of Periodic Frame\n"); 246772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 246872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_SOF: 246972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "Start of Periodic Frame\n"); 247072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 247172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_ERRATIC_ERROR: 247272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "Erratic Error\n"); 247372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 247472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_CMD_CMPL: 247572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "Command Complete\n"); 247672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 247772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_OVERFLOW: 247872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "Overflow\n"); 247972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 248072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 248172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "UNKNOWN IRQ %d\n", event->type); 248272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 248372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 248472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 248572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_process_event_entry(struct dwc3 *dwc, 248672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const union dwc3_event *event) 248772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 248872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* Endpoint IRQ, handle it and return early */ 248972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (event->type.is_devspec == 0) { 249072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* depevt */ 249172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return dwc3_endpoint_interrupt(dwc, &event->depevt); 249272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 249372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 249472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (event->type.type) { 249572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_EVENT_TYPE_DEV: 249672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_interrupt(dwc, &event->devt); 249772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 249872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* REVISIT what to do with Carkit and I2C events ? */ 249972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 250072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "UNKNOWN IRQ type %d\n", event->raw); 250172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 250272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 250372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 2504f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbistatic irqreturn_t dwc3_process_event_buf(struct dwc3 *dwc, u32 buf) 2505b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi{ 2506f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi struct dwc3_event_buffer *evt; 2507b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi irqreturn_t ret = IRQ_NONE; 2508f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi int left; 2509e8adfc30ff9282a728fd8b666b6418308164c415Felipe Balbi u32 reg; 2510b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi 2511f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi evt = dwc->ev_buffs[buf]; 2512f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi left = evt->count; 2513b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi 2514f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi if (!(evt->flags & DWC3_EVENT_PENDING)) 2515f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi return IRQ_NONE; 2516b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi 2517f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi while (left > 0) { 2518f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi union dwc3_event event; 2519b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi 2520f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi event.raw = *(u32 *) (evt->buf + evt->lpos); 2521b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi 2522f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi dwc3_process_event_entry(dwc, &event); 2523b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi 2524f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi /* 2525f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi * FIXME we wrap around correctly to the next entry as 2526f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi * almost all entries are 4 bytes in size. There is one 2527f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi * entry which has 12 bytes which is a regular entry 2528f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi * followed by 8 bytes data. ATM I don't know how 2529f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi * things are organized if we get next to the a 2530f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi * boundary so I worry about that once we try to handle 2531f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi * that. 2532f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi */ 2533f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi evt->lpos = (evt->lpos + 4) % DWC3_EVENT_BUFFERS_SIZE; 2534f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi left -= 4; 2535b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi 2536f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi dwc3_writel(dwc->regs, DWC3_GEVNTCOUNT(buf), 4); 2537f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi } 2538b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi 2539f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi evt->count = 0; 2540f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi evt->flags &= ~DWC3_EVENT_PENDING; 2541f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi ret = IRQ_HANDLED; 2542b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi 2543f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi /* Unmask interrupt */ 2544f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi reg = dwc3_readl(dwc->regs, DWC3_GEVNTSIZ(buf)); 2545f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi reg &= ~DWC3_GEVNTSIZ_INTMASK; 2546f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi dwc3_writel(dwc->regs, DWC3_GEVNTSIZ(buf), reg); 2547b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi 2548f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi return ret; 2549f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi} 2550e8adfc30ff9282a728fd8b666b6418308164c415Felipe Balbi 2551f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbistatic irqreturn_t dwc3_thread_interrupt(int irq, void *_dwc) 2552f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi{ 2553f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi struct dwc3 *dwc = _dwc; 2554f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi unsigned long flags; 2555f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi irqreturn_t ret = IRQ_NONE; 2556f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi int i; 2557f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi 2558f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi spin_lock_irqsave(&dwc->lock, flags); 2559f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi 2560f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi for (i = 0; i < dwc->num_event_buffers; i++) 2561f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi ret |= dwc3_process_event_buf(dwc, i); 2562b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi 2563b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 2564b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi 2565b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi return ret; 2566b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi} 2567b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi 25687f97aa9865800766e570d0e1be772a034dd30388Felipe Balbistatic irqreturn_t dwc3_check_event_buf(struct dwc3 *dwc, u32 buf) 256972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 257072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_event_buffer *evt; 257172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 count; 2572e8adfc30ff9282a728fd8b666b6418308164c415Felipe Balbi u32 reg; 257372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 2574b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi evt = dwc->ev_buffs[buf]; 2575b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi 257672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi count = dwc3_readl(dwc->regs, DWC3_GEVNTCOUNT(buf)); 257772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi count &= DWC3_GEVNTCOUNT_MASK; 257872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!count) 257972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return IRQ_NONE; 258072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 2581b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi evt->count = count; 2582b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi evt->flags |= DWC3_EVENT_PENDING; 258372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 2584e8adfc30ff9282a728fd8b666b6418308164c415Felipe Balbi /* Mask interrupt */ 2585e8adfc30ff9282a728fd8b666b6418308164c415Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_GEVNTSIZ(buf)); 2586e8adfc30ff9282a728fd8b666b6418308164c415Felipe Balbi reg |= DWC3_GEVNTSIZ_INTMASK; 2587e8adfc30ff9282a728fd8b666b6418308164c415Felipe Balbi dwc3_writel(dwc->regs, DWC3_GEVNTSIZ(buf), reg); 2588e8adfc30ff9282a728fd8b666b6418308164c415Felipe Balbi 2589b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi return IRQ_WAKE_THREAD; 259072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 259172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 259272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic irqreturn_t dwc3_interrupt(int irq, void *_dwc) 259372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 259472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = _dwc; 259572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int i; 259672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi irqreturn_t ret = IRQ_NONE; 259772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 259872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock(&dwc->lock); 259972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 26009f622b2a407d8b34a5a7f5b4abd8b29b25cf4f32Felipe Balbi for (i = 0; i < dwc->num_event_buffers; i++) { 260172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi irqreturn_t status; 260272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 26037f97aa9865800766e570d0e1be772a034dd30388Felipe Balbi status = dwc3_check_event_buf(dwc, i); 2604b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi if (status == IRQ_WAKE_THREAD) 260572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = status; 260672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 260772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 260872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock(&dwc->lock); 260972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 261072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 261172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 261272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 261372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/** 261472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * dwc3_gadget_init - Initializes gadget related registers 26151d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * @dwc: pointer to our controller context structure 261672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 261772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Returns 0 on success otherwise negative errno. 261872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 261941ac7b3ab7fe1d6175839947a877fdf95cbd2211Bill Pembertonint dwc3_gadget_init(struct dwc3 *dwc) 262072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 262172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 262272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 262372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ctrl_req = dma_alloc_coherent(dwc->dev, sizeof(*dwc->ctrl_req), 262472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi &dwc->ctrl_req_addr, GFP_KERNEL); 262572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dwc->ctrl_req) { 262672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to allocate ctrl request\n"); 262772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -ENOMEM; 262872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto err0; 262972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 263072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 263172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ep0_trb = dma_alloc_coherent(dwc->dev, sizeof(*dwc->ep0_trb), 263272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi &dwc->ep0_trb_addr, GFP_KERNEL); 263372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dwc->ep0_trb) { 263472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to allocate ep0 trb\n"); 263572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -ENOMEM; 263672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto err1; 263772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 263872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 26393ef35fafdc87b72851f7785dc5331a0f4eb1b3ceFelipe Balbi dwc->setup_buf = kzalloc(DWC3_EP0_BOUNCE_SIZE, GFP_KERNEL); 264072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dwc->setup_buf) { 264172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to allocate setup buffer\n"); 264272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -ENOMEM; 264372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto err2; 264472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 264572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 26465812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi dwc->ep0_bounce = dma_alloc_coherent(dwc->dev, 26473ef35fafdc87b72851f7785dc5331a0f4eb1b3ceFelipe Balbi DWC3_EP0_BOUNCE_SIZE, &dwc->ep0_bounce_addr, 26483ef35fafdc87b72851f7785dc5331a0f4eb1b3ceFelipe Balbi GFP_KERNEL); 26495812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi if (!dwc->ep0_bounce) { 26505812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi dev_err(dwc->dev, "failed to allocate ep0 bounce buffer\n"); 26515812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi ret = -ENOMEM; 26525812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi goto err3; 26535812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi } 26545812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi 265572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ops = &dwc3_gadget_ops; 2656d327ab5b6d660d6fe22b073b743fde1668e593bbMichal Nazarewicz dwc->gadget.max_speed = USB_SPEED_SUPER; 265772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_UNKNOWN; 2658eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dwc->gadget.sg_supported = true; 265972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.name = "dwc3-gadget"; 266072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 266172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 2662a4b9d94b3dc8e65951c1819d37f213b3c6815adcDavid Cohen * Per databook, DWC3 needs buffer size to be aligned to MaxPacketSize 2663a4b9d94b3dc8e65951c1819d37f213b3c6815adcDavid Cohen * on ep out. 2664a4b9d94b3dc8e65951c1819d37f213b3c6815adcDavid Cohen */ 2665a4b9d94b3dc8e65951c1819d37f213b3c6815adcDavid Cohen dwc->gadget.quirk_ep_out_aligned_size = true; 2666a4b9d94b3dc8e65951c1819d37f213b3c6815adcDavid Cohen 2667a4b9d94b3dc8e65951c1819d37f213b3c6815adcDavid Cohen /* 266872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * REVISIT: Here we should clear all pending IRQs to be 266972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * sure we're starting from a well known location. 267072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 267172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 267272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_gadget_init_endpoints(dwc); 267372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 26745812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi goto err4; 267572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 267672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = usb_add_gadget_udc(dwc->dev, &dwc->gadget); 267772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 267872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to register udc\n"); 2679e1f804676a95b9d5caaa3a822d90bc1101595468David Cohen goto err4; 268072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 268172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 268272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 268372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 26845812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbierr4: 2685e1f804676a95b9d5caaa3a822d90bc1101595468David Cohen dwc3_gadget_free_endpoints(dwc); 26863ef35fafdc87b72851f7785dc5331a0f4eb1b3ceFelipe Balbi dma_free_coherent(dwc->dev, DWC3_EP0_BOUNCE_SIZE, 26873ef35fafdc87b72851f7785dc5331a0f4eb1b3ceFelipe Balbi dwc->ep0_bounce, dwc->ep0_bounce_addr); 26885812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi 268972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbierr3: 26900fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi kfree(dwc->setup_buf); 269172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 269272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbierr2: 269372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(*dwc->ep0_trb), 269472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ep0_trb, dwc->ep0_trb_addr); 269572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 269672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbierr1: 269772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(*dwc->ctrl_req), 269872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ctrl_req, dwc->ctrl_req_addr); 269972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 270072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbierr0: 270172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 270272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 270372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 27047415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi/* -------------------------------------------------------------------------- */ 27057415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 270672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbivoid dwc3_gadget_exit(struct dwc3 *dwc) 270772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 270872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi usb_del_gadget_udc(&dwc->gadget); 270972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 271072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_free_endpoints(dwc); 271172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 27123ef35fafdc87b72851f7785dc5331a0f4eb1b3ceFelipe Balbi dma_free_coherent(dwc->dev, DWC3_EP0_BOUNCE_SIZE, 27133ef35fafdc87b72851f7785dc5331a0f4eb1b3ceFelipe Balbi dwc->ep0_bounce, dwc->ep0_bounce_addr); 27145812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi 27150fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi kfree(dwc->setup_buf); 271672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 271772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(*dwc->ep0_trb), 271872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ep0_trb, dwc->ep0_trb_addr); 271972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 272072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(*dwc->ctrl_req), 272172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ctrl_req, dwc->ctrl_req_addr); 272272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 27237415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 27247415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbiint dwc3_gadget_prepare(struct dwc3 *dwc) 27257415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi{ 27267b2a0368bbc9bc4a7936d8587eaff4b8c35b2247Felipe Balbi if (dwc->pullups_connected) { 27277415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi dwc3_gadget_disable_irq(dwc); 27287b2a0368bbc9bc4a7936d8587eaff4b8c35b2247Felipe Balbi dwc3_gadget_run_stop(dwc, true, true); 27297b2a0368bbc9bc4a7936d8587eaff4b8c35b2247Felipe Balbi } 27307415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 27317415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi return 0; 27327415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi} 27337415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 27347415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbivoid dwc3_gadget_complete(struct dwc3 *dwc) 27357415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi{ 27367415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi if (dwc->pullups_connected) { 27377415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi dwc3_gadget_enable_irq(dwc); 27387b2a0368bbc9bc4a7936d8587eaff4b8c35b2247Felipe Balbi dwc3_gadget_run_stop(dwc, true, false); 27397415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi } 27407415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi} 27417415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 27427415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbiint dwc3_gadget_suspend(struct dwc3 *dwc) 27437415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi{ 27447415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi __dwc3_gadget_ep_disable(dwc->eps[0]); 27457415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi __dwc3_gadget_ep_disable(dwc->eps[1]); 27467415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 27477415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi dwc->dcfg = dwc3_readl(dwc->regs, DWC3_DCFG); 27487415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 27497415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi return 0; 27507415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi} 27517415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 27527415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbiint dwc3_gadget_resume(struct dwc3 *dwc) 27537415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi{ 27547415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi struct dwc3_ep *dep; 27557415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi int ret; 27567415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 27577415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi /* Start with SuperSpeed Default */ 27587415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(512); 27597415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 27607415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi dep = dwc->eps[0]; 2761265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL, false, 2762265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman false); 27637415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi if (ret) 27647415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi goto err0; 27657415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 27667415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi dep = dwc->eps[1]; 2767265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL, false, 2768265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman false); 27697415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi if (ret) 27707415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi goto err1; 27717415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 27727415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi /* begin to receive SETUP packets */ 27737415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi dwc->ep0state = EP0_SETUP_PHASE; 27747415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi dwc3_ep0_out_start(dwc); 27757415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 27767415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCFG, dwc->dcfg); 27777415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 27787415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi return 0; 27797415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 27807415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbierr1: 27817415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi __dwc3_gadget_ep_disable(dwc->eps[0]); 27827415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 27837415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbierr0: 27847415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi return ret; 27857415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi} 2786