gadget.c revision 304f7e5e1d08fa2f5674c1323bd0ebd806c86b81
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 3380977dc99be5d874d10716594e716ef317c1723cFelipe Balbi#include "debug.h" 3472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include "core.h" 3572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include "gadget.h" 3672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include "io.h" 3772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 3804a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi/** 3904a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi * dwc3_gadget_set_test_mode - Enables USB2 Test Modes 4004a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi * @dwc: pointer to our context structure 4104a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi * @mode: the mode to set (J, K SE0 NAK, Force Enable) 4204a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi * 4304a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi * Caller should take care of locking. This function will 4404a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi * return 0 on success or -EINVAL if wrong Test Selector 4504a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi * is passed 4604a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi */ 4704a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbiint dwc3_gadget_set_test_mode(struct dwc3 *dwc, int mode) 4804a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi{ 4904a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi u32 reg; 5004a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi 5104a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 5204a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi reg &= ~DWC3_DCTL_TSTCTRL_MASK; 5304a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi 5404a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi switch (mode) { 5504a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi case TEST_J: 5604a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi case TEST_K: 5704a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi case TEST_SE0_NAK: 5804a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi case TEST_PACKET: 5904a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi case TEST_FORCE_EN: 6004a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi reg |= mode << 1; 6104a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi break; 6204a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi default: 6304a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi return -EINVAL; 6404a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi } 6504a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi 6604a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 6704a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi 6804a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi return 0; 6904a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi} 7004a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi 718598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi/** 72911f1f88cadf4b64bad5aa4c257d72494a62f928Paul Zimmerman * dwc3_gadget_get_link_state - Gets current state of USB Link 73911f1f88cadf4b64bad5aa4c257d72494a62f928Paul Zimmerman * @dwc: pointer to our context structure 74911f1f88cadf4b64bad5aa4c257d72494a62f928Paul Zimmerman * 75911f1f88cadf4b64bad5aa4c257d72494a62f928Paul Zimmerman * Caller should take care of locking. This function will 76911f1f88cadf4b64bad5aa4c257d72494a62f928Paul Zimmerman * return the link state on success (>= 0) or -ETIMEDOUT. 77911f1f88cadf4b64bad5aa4c257d72494a62f928Paul Zimmerman */ 78911f1f88cadf4b64bad5aa4c257d72494a62f928Paul Zimmermanint dwc3_gadget_get_link_state(struct dwc3 *dwc) 79911f1f88cadf4b64bad5aa4c257d72494a62f928Paul Zimmerman{ 80911f1f88cadf4b64bad5aa4c257d72494a62f928Paul Zimmerman u32 reg; 81911f1f88cadf4b64bad5aa4c257d72494a62f928Paul Zimmerman 82911f1f88cadf4b64bad5aa4c257d72494a62f928Paul Zimmerman reg = dwc3_readl(dwc->regs, DWC3_DSTS); 83911f1f88cadf4b64bad5aa4c257d72494a62f928Paul Zimmerman 84911f1f88cadf4b64bad5aa4c257d72494a62f928Paul Zimmerman return DWC3_DSTS_USBLNKST(reg); 85911f1f88cadf4b64bad5aa4c257d72494a62f928Paul Zimmerman} 86911f1f88cadf4b64bad5aa4c257d72494a62f928Paul Zimmerman 87911f1f88cadf4b64bad5aa4c257d72494a62f928Paul Zimmerman/** 888598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi * dwc3_gadget_set_link_state - Sets USB Link to a particular State 898598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi * @dwc: pointer to our context structure 908598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi * @state: the state to put link into 918598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi * 928598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi * Caller should take care of locking. This function will 93aee63e3cb6b0396b99c6387a47cb90a7417f3957Paul Zimmerman * return 0 on success or -ETIMEDOUT. 948598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi */ 958598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbiint dwc3_gadget_set_link_state(struct dwc3 *dwc, enum dwc3_link_state state) 968598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi{ 97aee63e3cb6b0396b99c6387a47cb90a7417f3957Paul Zimmerman int retries = 10000; 988598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi u32 reg; 998598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi 100802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman /* 101802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman * Wait until device controller is ready. Only applies to 1.94a and 102802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman * later RTL. 103802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman */ 104802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman if (dwc->revision >= DWC3_REVISION_194A) { 105802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman while (--retries) { 106802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman reg = dwc3_readl(dwc->regs, DWC3_DSTS); 107802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman if (reg & DWC3_DSTS_DCNRD) 108802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman udelay(5); 109802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman else 110802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman break; 111802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman } 112802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman 113802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman if (retries <= 0) 114802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman return -ETIMEDOUT; 115802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman } 116802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman 1178598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 1188598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi reg &= ~DWC3_DCTL_ULSTCHNGREQ_MASK; 1198598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi 1208598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi /* set requested state */ 1218598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi reg |= DWC3_DCTL_ULSTCHNGREQ(state); 1228598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 1238598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi 124802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman /* 125802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman * The following code is racy when called from dwc3_gadget_wakeup, 126802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman * and is not needed, at least on newer versions 127802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman */ 128802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman if (dwc->revision >= DWC3_REVISION_194A) 129802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman return 0; 130802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman 1318598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi /* wait for a change in DSTS */ 132aed430e5139af3e2c251f52db7fc6c5e2ce2b714Paul Zimmerman retries = 10000; 1338598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi while (--retries) { 1348598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 1358598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi 1368598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi if (DWC3_DSTS_USBLNKST(reg) == state) 1378598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi return 0; 1388598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi 139aee63e3cb6b0396b99c6387a47cb90a7417f3957Paul Zimmerman udelay(5); 1408598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi } 1418598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi 1428598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi dev_vdbg(dwc->dev, "link state change request timed out\n"); 1438598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi 1448598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi return -ETIMEDOUT; 1458598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi} 1468598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi 147457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi/** 148457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * dwc3_gadget_resize_tx_fifos - reallocate fifo spaces for current use-case 149457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * @dwc: pointer to our context structure 150457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * 151457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * This function will a best effort FIFO allocation in order 152457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * to improve FIFO usage and throughput, while still allowing 153457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * us to enable as many endpoints as possible. 154457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * 155457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * Keep in mind that this operation will be highly dependent 156457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * on the configured size for RAM1 - which contains TxFifo -, 157457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * the amount of endpoints enabled on coreConsultant tool, and 158457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * the width of the Master Bus. 159457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * 160457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * In the ideal world, we would always be able to satisfy the 161457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * following equation: 162457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * 163457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * ((512 + 2 * MDWIDTH-Bytes) + (Number of IN Endpoints - 1) * \ 164457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * (3 * (1024 + MDWIDTH-Bytes) + MDWIDTH-Bytes)) / MDWIDTH-Bytes 165457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * 166457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * Unfortunately, due to many variables that's not always the case. 167457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi */ 168457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbiint dwc3_gadget_resize_tx_fifos(struct dwc3 *dwc) 169457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi{ 170457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi int last_fifo_depth = 0; 171457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi int ram1_depth; 172457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi int fifo_size; 173457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi int mdwidth; 174457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi int num; 175457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 176457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi if (!dwc->needs_fifo_resize) 177457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi return 0; 178457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 179457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi ram1_depth = DWC3_RAM1_DEPTH(dwc->hwparams.hwparams7); 180457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi mdwidth = DWC3_MDWIDTH(dwc->hwparams.hwparams0); 181457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 182457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi /* MDWIDTH is represented in bits, we need it in bytes */ 183457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi mdwidth >>= 3; 184457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 185457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi /* 186457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * FIXME For now we will only allocate 1 wMaxPacketSize space 187457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * for each enabled endpoint, later patches will come to 188457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * improve this algorithm so that we better use the internal 189457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * FIFO space 190457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi */ 19132702e96a9f76ea0e0a1d218310d2ac1adbd2907Jack Pham for (num = 0; num < dwc->num_in_eps; num++) { 19232702e96a9f76ea0e0a1d218310d2ac1adbd2907Jack Pham /* bit0 indicates direction; 1 means IN ep */ 19332702e96a9f76ea0e0a1d218310d2ac1adbd2907Jack Pham struct dwc3_ep *dep = dwc->eps[(num << 1) | 1]; 1942e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi int mult = 1; 195457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi int tmp; 196457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 197457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) 198457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi continue; 199457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 20016e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if (usb_endpoint_xfer_bulk(dep->endpoint.desc) 20116e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz || usb_endpoint_xfer_isoc(dep->endpoint.desc)) 2022e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi mult = 3; 2032e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi 2042e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi /* 2052e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi * REVISIT: the following assumes we will always have enough 2062e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi * space available on the FIFO RAM for all possible use cases. 2072e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi * Make sure that's true somehow and change FIFO allocation 2082e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi * accordingly. 2092e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi * 2102e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi * If we have Bulk or Isochronous endpoints, we want 2112e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi * them to be able to be very, very fast. So we're giving 2122e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi * those endpoints a fifo_size which is enough for 3 full 2132e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi * packets 2142e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi */ 2152e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi tmp = mult * (dep->endpoint.maxpacket + mdwidth); 216457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi tmp += mdwidth; 217457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 218457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi fifo_size = DIV_ROUND_UP(tmp, mdwidth); 2192e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi 220457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi fifo_size |= (last_fifo_depth << 16); 221457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 222457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi dev_vdbg(dwc->dev, "%s: Fifo Addr %04x Size %d\n", 223457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi dep->name, last_fifo_depth, fifo_size & 0xffff); 224457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 22532702e96a9f76ea0e0a1d218310d2ac1adbd2907Jack Pham dwc3_writel(dwc->regs, DWC3_GTXFIFOSIZ(num), fifo_size); 226457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 227457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi last_fifo_depth += (fifo_size & 0xffff); 228457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi } 229457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 230457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi return 0; 231457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi} 232457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 23372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbivoid dwc3_gadget_giveback(struct dwc3_ep *dep, struct dwc3_request *req, 23472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int status) 23572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 23672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 237e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand int i; 23872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 23972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (req->queued) { 240e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand i = 0; 241e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand do { 242eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dep->busy_slot++; 243e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand /* 244e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * Skip LINK TRB. We can't use req->trb and check for 245e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * DWC3_TRBCTL_LINK_TRB because it points the TRB we 246e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * just completed (not the LINK TRB). 247e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand */ 248e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if (((dep->busy_slot & DWC3_TRB_MASK) == 249e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand DWC3_TRB_NUM- 1) && 25016e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz usb_endpoint_xfer_isoc(dep->endpoint.desc)) 251e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand dep->busy_slot++; 252e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand } while(++i < req->request.num_mapped_sgs); 253c9fda7d6f62a6520e01652d370654c5657d3c1a1Pratyush Anand req->queued = false; 25472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 25572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_del(&req->list); 256eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi req->trb = NULL; 25772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 25872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (req->request.status == -EINPROGRESS) 25972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.status = status; 26072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 2610416e494ce7dc84e2719bc9fb7daecb330476074Pratyush Anand if (dwc->ep0_bounced && dep->number == 0) 2620416e494ce7dc84e2719bc9fb7daecb330476074Pratyush Anand dwc->ep0_bounced = false; 2630416e494ce7dc84e2719bc9fb7daecb330476074Pratyush Anand else 2640416e494ce7dc84e2719bc9fb7daecb330476074Pratyush Anand usb_gadget_unmap_request(&dwc->gadget, &req->request, 2650416e494ce7dc84e2719bc9fb7daecb330476074Pratyush Anand req->direction); 26672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 26772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "request %p from %s completed %d/%d ===> %d\n", 26872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req, dep->name, req->request.actual, 26972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.length, status); 2702c4cbe6e5a9c71408b496e00a78ea9284e98af16Felipe Balbi trace_dwc3_gadget_giveback(req); 27172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 27272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock(&dwc->lock); 273304f7e5e1d08fa2f5674c1323bd0ebd806c86b81Michal Sojka usb_gadget_giveback_request(&dep->endpoint, &req->request); 27472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock(&dwc->lock); 27572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 27672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 2773ece0ec474bf3cea9eefa7f92e3d4b6c3f9f71fdFelipe Balbiint dwc3_send_gadget_generic_command(struct dwc3 *dwc, unsigned cmd, u32 param) 278b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi{ 279b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi u32 timeout = 500; 280b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi u32 reg; 281b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi 2822c4cbe6e5a9c71408b496e00a78ea9284e98af16Felipe Balbi trace_dwc3_gadget_generic_cmd(cmd, param); 283427c3df684ab97379b529188d505cc99c2a1429dFelipe Balbi 284b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi dwc3_writel(dwc->regs, DWC3_DGCMDPAR, param); 285b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi dwc3_writel(dwc->regs, DWC3_DGCMD, cmd | DWC3_DGCMD_CMDACT); 286b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi 287b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi do { 288b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DGCMD); 289b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi if (!(reg & DWC3_DGCMD_CMDACT)) { 290b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi dev_vdbg(dwc->dev, "Command Complete --> %d\n", 291b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi DWC3_DGCMD_STATUS(reg)); 292b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi return 0; 293b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi } 294b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi 295b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi /* 296b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi * We can't sleep here, because it's also called from 297b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi * interrupt context. 298b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi */ 299b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi timeout--; 300b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi if (!timeout) 301b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi return -ETIMEDOUT; 302b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi udelay(1); 303b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi } while (1); 304b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi} 305b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi 30672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiint dwc3_send_gadget_ep_cmd(struct dwc3 *dwc, unsigned ep, 30772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned cmd, struct dwc3_gadget_ep_cmd_params *params) 30872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 30972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = dwc->eps[ep]; 31061d58242f634642de42d6a4098913b7254a65053Sebastian Andrzej Siewior u32 timeout = 500; 31172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 31272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 3132c4cbe6e5a9c71408b496e00a78ea9284e98af16Felipe Balbi trace_dwc3_gadget_ep_cmd(dep, cmd, params); 31472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 315dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEPCMDPAR0(ep), params->param0); 316dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEPCMDPAR1(ep), params->param1); 317dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEPCMDPAR2(ep), params->param2); 31872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 31972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEPCMD(ep), cmd | DWC3_DEPCMD_CMDACT); 32072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi do { 32172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DEPCMD(ep)); 32272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(reg & DWC3_DEPCMD_CMDACT)) { 323164f6e141ed214bda30fb219d41ec3254bd90886Felipe Balbi dev_vdbg(dwc->dev, "Command Complete --> %d\n", 324164f6e141ed214bda30fb219d41ec3254bd90886Felipe Balbi DWC3_DEPCMD_STATUS(reg)); 32572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 32672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 32772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 32872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 32972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We can't sleep here, because it is also called from 33072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * interrupt context. 33172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 33272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi timeout--; 33372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!timeout) 33472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -ETIMEDOUT; 33572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 33661d58242f634642de42d6a4098913b7254a65053Sebastian Andrzej Siewior udelay(1); 33772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } while (1); 33872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 33972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 34072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic dma_addr_t dwc3_trb_dma_offset(struct dwc3_ep *dep, 341f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi struct dwc3_trb *trb) 34272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 343c439ef87c33a1df30f528cb152151465c2529cacPaul Zimmerman u32 offset = (char *) trb - (char *) dep->trb_pool; 34472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 34572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return dep->trb_pool_dma + offset; 34672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 34772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 34872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_alloc_trb_pool(struct dwc3_ep *dep) 34972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 35072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 35172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 35272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->trb_pool) 35372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 35472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 35572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->number == 0 || dep->number == 1) 35672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 35772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 35872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->trb_pool = dma_alloc_coherent(dwc->dev, 35972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi sizeof(struct dwc3_trb) * DWC3_TRB_NUM, 36072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi &dep->trb_pool_dma, GFP_KERNEL); 36172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dep->trb_pool) { 36272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dep->dwc->dev, "failed to allocate trb pool for %s\n", 36372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 36472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -ENOMEM; 36572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 36672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 36772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 36872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 36972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 37072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_free_trb_pool(struct dwc3_ep *dep) 37172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 37272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 37372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 37472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(struct dwc3_trb) * DWC3_TRB_NUM, 37572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->trb_pool, dep->trb_pool_dma); 37672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 37772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->trb_pool = NULL; 37872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->trb_pool_dma = 0; 37972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 38072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 38172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_start_config(struct dwc3 *dwc, struct dwc3_ep *dep) 38272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 38372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 38472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 cmd; 38572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 38672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0x00, sizeof(params)); 38772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 38872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->number != 1) { 38972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd = DWC3_DEPCMD_DEPSTARTCFG; 39072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* XferRscIdx == 0 for ep0 and 2 for the remaining */ 391b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman if (dep->number > 1) { 392b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman if (dwc->start_config_issued) 393b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman return 0; 394b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman dwc->start_config_issued = true; 39572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd |= DWC3_DEPCMD_PARAM(2); 396b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman } 39772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 39872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return dwc3_send_gadget_ep_cmd(dwc, 0, cmd, ¶ms); 39972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 40072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 40172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 40272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 40372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 40472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_set_ep_config(struct dwc3 *dwc, struct dwc3_ep *dep, 405c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi const struct usb_endpoint_descriptor *desc, 4064b345c9a3c7452340fb477868d8db475f05978b1Felipe Balbi const struct usb_ss_ep_comp_descriptor *comp_desc, 407265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman bool ignore, bool restore) 40872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 40972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 41072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 41172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0x00, sizeof(params)); 41272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 413dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param0 = DWC3_DEPCFG_EP_TYPE(usb_endpoint_type(desc)) 414d2e9a13a388304bc2a7b25a6c34c6e2ab1540a5dChanho Park | DWC3_DEPCFG_MAX_PACKET_SIZE(usb_endpoint_maxp(desc)); 415d2e9a13a388304bc2a7b25a6c34c6e2ab1540a5dChanho Park 416d2e9a13a388304bc2a7b25a6c34c6e2ab1540a5dChanho Park /* Burst size is only needed in SuperSpeed mode */ 417d2e9a13a388304bc2a7b25a6c34c6e2ab1540a5dChanho Park if (dwc->gadget.speed == USB_SPEED_SUPER) { 418d2e9a13a388304bc2a7b25a6c34c6e2ab1540a5dChanho Park u32 burst = dep->endpoint.maxburst - 1; 419d2e9a13a388304bc2a7b25a6c34c6e2ab1540a5dChanho Park 420d2e9a13a388304bc2a7b25a6c34c6e2ab1540a5dChanho Park params.param0 |= DWC3_DEPCFG_BURST_SIZE(burst); 421d2e9a13a388304bc2a7b25a6c34c6e2ab1540a5dChanho Park } 42272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 4234b345c9a3c7452340fb477868d8db475f05978b1Felipe Balbi if (ignore) 4244b345c9a3c7452340fb477868d8db475f05978b1Felipe Balbi params.param0 |= DWC3_DEPCFG_IGN_SEQ_NUM; 4254b345c9a3c7452340fb477868d8db475f05978b1Felipe Balbi 426265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman if (restore) { 427265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman params.param0 |= DWC3_DEPCFG_ACTION_RESTORE; 428265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman params.param2 |= dep->saved_state; 429265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman } 430265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman 431dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param1 = DWC3_DEPCFG_XFER_COMPLETE_EN 432dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi | DWC3_DEPCFG_XFER_NOT_READY_EN; 43372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 43418b7ede5f7ee2092aedcb578d3ac30bd5d4fc23cFelipe Balbi if (usb_ss_max_streams(comp_desc) && usb_endpoint_xfer_bulk(desc)) { 435dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param1 |= DWC3_DEPCFG_STREAM_CAPABLE 436dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi | DWC3_DEPCFG_STREAM_EVENT_EN; 437879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dep->stream_capable = true; 438879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi } 439879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi 4400b93a4c838fa10370d72f86fe712426ac63804deFelipe Balbi if (!usb_endpoint_xfer_control(desc)) 441dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param1 |= DWC3_DEPCFG_XFER_IN_PROGRESS_EN; 44272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 44372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 44472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We are doing 1:1 mapping for endpoints, meaning 44572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Physical Endpoints 2 maps to Logical Endpoint 2 and 44672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * so on. We consider the direction bit as part of the physical 44772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * endpoint number. So USB endpoint 0x81 is 0x03. 44872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 449dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param1 |= DWC3_DEPCFG_EP_NUMBER(dep->number); 45072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 45172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 45272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We must use the lower 16 TX FIFOs even though 45372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * HW might have more 45472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 45572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->direction) 456dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param0 |= DWC3_DEPCFG_FIFO_NUMBER(dep->number >> 1); 45772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 45872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (desc->bInterval) { 459dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param1 |= DWC3_DEPCFG_BINTERVAL_M1(desc->bInterval - 1); 46072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->interval = 1 << (desc->bInterval - 1); 46172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 46272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 46372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return dwc3_send_gadget_ep_cmd(dwc, dep->number, 46472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEPCMD_SETEPCONFIG, ¶ms); 46572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 46672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 46772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_set_xfer_resource(struct dwc3 *dwc, struct dwc3_ep *dep) 46872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 46972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 47072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 47172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0x00, sizeof(params)); 47272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 473dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param0 = DWC3_DEPXFERCFG_NUM_XFER_RES(1); 47472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 47572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return dwc3_send_gadget_ep_cmd(dwc, dep->number, 47672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEPCMD_SETTRANSFRESOURCE, ¶ms); 47772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 47872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 47972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/** 48072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * __dwc3_gadget_ep_enable - Initializes a HW endpoint 48172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * @dep: endpoint to be initialized 48272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * @desc: USB Endpoint Descriptor 48372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 48472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Caller should take care of locking 48572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 48672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int __dwc3_gadget_ep_enable(struct dwc3_ep *dep, 487c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi const struct usb_endpoint_descriptor *desc, 4884b345c9a3c7452340fb477868d8db475f05978b1Felipe Balbi const struct usb_ss_ep_comp_descriptor *comp_desc, 489265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman bool ignore, bool restore) 49072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 49172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 49272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 493b09e99ee7c2b7ee80cca128b93b07fb830e6ecadAndy Shevchenko int ret; 49472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 495ff62d6b6727360ae73382213bc1ebac6cf5160d7Felipe Balbi dev_vdbg(dwc->dev, "Enabling %s\n", dep->name); 496ff62d6b6727360ae73382213bc1ebac6cf5160d7Felipe Balbi 49772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) { 49872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_gadget_start_config(dwc, dep); 49972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 50072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 50172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 50272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 503265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman ret = dwc3_gadget_set_ep_config(dwc, dep, desc, comp_desc, ignore, 504265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman restore); 50572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 50672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 50772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 50872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) { 509f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi struct dwc3_trb *trb_st_hw; 510f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi struct dwc3_trb *trb_link; 51172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 51272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_gadget_set_xfer_resource(dwc, dep); 51372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 51472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 51572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 51616e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz dep->endpoint.desc = desc; 517c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi dep->comp_desc = comp_desc; 51872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->type = usb_endpoint_type(desc); 51972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags |= DWC3_EP_ENABLED; 52072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 52172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DALEPENA); 52272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg |= DWC3_DALEPENA_EP(dep->number); 52372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DALEPENA, reg); 52472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 52572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!usb_endpoint_xfer_isoc(desc)) 52672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 52772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 52872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(&trb_link, 0, sizeof(trb_link)); 52972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 5301d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman /* Link TRB for ISOC. The HWO bit is never reset */ 53172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trb_st_hw = &dep->trb_pool[0]; 53272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 533f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb_link = &dep->trb_pool[DWC3_TRB_NUM - 1]; 53472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 535f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb_link->bpl = lower_32_bits(dwc3_trb_dma_offset(dep, trb_st_hw)); 536f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb_link->bph = upper_32_bits(dwc3_trb_dma_offset(dep, trb_st_hw)); 537f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb_link->ctrl |= DWC3_TRBCTL_LINK_TRB; 538f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb_link->ctrl |= DWC3_TRB_CTRL_HWO; 53972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 54072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 54172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 54272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 54372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 544b992e6813e257269e9599ca07be8bd52df784bf5Paul Zimmermanstatic void dwc3_stop_active_transfer(struct dwc3 *dwc, u32 epnum, bool force); 545624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewiorstatic void dwc3_remove_requests(struct dwc3 *dwc, struct dwc3_ep *dep) 54672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 54772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req; 54872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 549ea53b8828c50b7a5138a8931c41b2671682c86b5Felipe Balbi if (!list_empty(&dep->req_queued)) { 550b992e6813e257269e9599ca07be8bd52df784bf5Paul Zimmerman dwc3_stop_active_transfer(dwc, dep->number, true); 551624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior 55257911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand /* - giveback all requests to gadget driver */ 5531591633ed6c4c3994944f31ddb59bc072a2ed0caPratyush Anand while (!list_empty(&dep->req_queued)) { 5541591633ed6c4c3994944f31ddb59bc072a2ed0caPratyush Anand req = next_request(&dep->req_queued); 5551591633ed6c4c3994944f31ddb59bc072a2ed0caPratyush Anand 5561591633ed6c4c3994944f31ddb59bc072a2ed0caPratyush Anand dwc3_gadget_giveback(dep, req, -ESHUTDOWN); 5571591633ed6c4c3994944f31ddb59bc072a2ed0caPratyush Anand } 558ea53b8828c50b7a5138a8931c41b2671682c86b5Felipe Balbi } 559ea53b8828c50b7a5138a8931c41b2671682c86b5Felipe Balbi 56072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi while (!list_empty(&dep->request_list)) { 56172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req = next_request(&dep->request_list); 56272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 563624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior dwc3_gadget_giveback(dep, req, -ESHUTDOWN); 56472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 56572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 56672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 56772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/** 56872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * __dwc3_gadget_ep_disable - Disables a HW endpoint 56972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * @dep: the endpoint to disable 57072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 571624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior * This function also removes requests which are currently processed ny the 572624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior * hardware and those which are not yet scheduled. 573624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior * Caller should take care of locking. 57472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 57572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int __dwc3_gadget_ep_disable(struct dwc3_ep *dep) 57672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 57772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 57872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 57972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 580624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior dwc3_remove_requests(dwc, dep); 58172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 582687ef9817df7ed960d14575b9033dde3d04631feFelipe Balbi /* make sure HW endpoint isn't stalled */ 583687ef9817df7ed960d14575b9033dde3d04631feFelipe Balbi if (dep->flags & DWC3_EP_STALL) 584687ef9817df7ed960d14575b9033dde3d04631feFelipe Balbi __dwc3_gadget_ep_set_halt(dep, 0); 585687ef9817df7ed960d14575b9033dde3d04631feFelipe Balbi 58672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DALEPENA); 58772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DALEPENA_EP(dep->number); 58872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DALEPENA, reg); 58972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 590879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dep->stream_capable = false; 591f9c56cdd3905c96c600456203637bd7ec8ec6383Ido Shayevitz dep->endpoint.desc = NULL; 592c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi dep->comp_desc = NULL; 59372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->type = 0; 594879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dep->flags = 0; 59572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 59672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 59772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 59872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 59972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 60072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 60172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep0_enable(struct usb_ep *ep, 60272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct usb_endpoint_descriptor *desc) 60372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 60472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EINVAL; 60572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 60672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 60772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep0_disable(struct usb_ep *ep) 60872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 60972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EINVAL; 61072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 61172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 61272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 61372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 61472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_enable(struct usb_ep *ep, 61572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct usb_endpoint_descriptor *desc) 61672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 61772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 61872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc; 61972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 62072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 62172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 62272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!ep || !desc || desc->bDescriptorType != USB_DT_ENDPOINT) { 62372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi pr_debug("dwc3: invalid parameters\n"); 62472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EINVAL; 62572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 62672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 62772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!desc->wMaxPacketSize) { 62872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi pr_debug("dwc3: missing wMaxPacketSize\n"); 62972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EINVAL; 63072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 63172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 63272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = to_dwc3_ep(ep); 63372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc = dep->dwc; 63472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 635c6f83f386c2f7987a344368e33e55840c12bd38fFelipe Balbi if (dep->flags & DWC3_EP_ENABLED) { 636c6f83f386c2f7987a344368e33e55840c12bd38fFelipe Balbi dev_WARN_ONCE(dwc->dev, true, "%s is already enabled\n", 637c6f83f386c2f7987a344368e33e55840c12bd38fFelipe Balbi dep->name); 638c6f83f386c2f7987a344368e33e55840c12bd38fFelipe Balbi return 0; 639c6f83f386c2f7987a344368e33e55840c12bd38fFelipe Balbi } 640c6f83f386c2f7987a344368e33e55840c12bd38fFelipe Balbi 64172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (usb_endpoint_type(desc)) { 64272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_ENDPOINT_XFER_CONTROL: 64327a78d6a283d6782438f72306746afe4bf44c215Anton Tikhomirov strlcat(dep->name, "-control", sizeof(dep->name)); 64472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 64572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_ENDPOINT_XFER_ISOC: 64627a78d6a283d6782438f72306746afe4bf44c215Anton Tikhomirov strlcat(dep->name, "-isoc", sizeof(dep->name)); 64772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 64872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_ENDPOINT_XFER_BULK: 64927a78d6a283d6782438f72306746afe4bf44c215Anton Tikhomirov strlcat(dep->name, "-bulk", sizeof(dep->name)); 65072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 65172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_ENDPOINT_XFER_INT: 65227a78d6a283d6782438f72306746afe4bf44c215Anton Tikhomirov strlcat(dep->name, "-int", sizeof(dep->name)); 65372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 65472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 65572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "invalid endpoint transfer type\n"); 65672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 65772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 65872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 659265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman ret = __dwc3_gadget_ep_enable(dep, desc, ep->comp_desc, false, false); 66072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 66172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 66272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 66372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 66472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 66572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_disable(struct usb_ep *ep) 66672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 66772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 66872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc; 66972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 67072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 67172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 67272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!ep) { 67372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi pr_debug("dwc3: invalid parameters\n"); 67472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EINVAL; 67572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 67672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 67772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = to_dwc3_ep(ep); 67872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc = dep->dwc; 67972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 68072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) { 68172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_WARN_ONCE(dwc->dev, true, "%s is already disabled\n", 68272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 68372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 68472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 68572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 68672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi snprintf(dep->name, sizeof(dep->name), "ep%d%s", 68772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->number >> 1, 68872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi (dep->number & 1) ? "in" : "out"); 68972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 69072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 69172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = __dwc3_gadget_ep_disable(dep); 69272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 69372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 69472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 69572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 69672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 69772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic struct usb_request *dwc3_gadget_ep_alloc_request(struct usb_ep *ep, 69872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi gfp_t gfp_flags) 69972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 70072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req; 70172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = to_dwc3_ep(ep); 70272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 70372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req = kzalloc(sizeof(*req), gfp_flags); 704734d5a5393ed8eedf70f13c7078cb4a6134f49f2Jingoo Han if (!req) 70572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return NULL; 70672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 70772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->epnum = dep->number; 70872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->dep = dep; 70972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 7102c4cbe6e5a9c71408b496e00a78ea9284e98af16Felipe Balbi trace_dwc3_alloc_request(req); 7112c4cbe6e5a9c71408b496e00a78ea9284e98af16Felipe Balbi 71272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return &req->request; 71372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 71472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 71572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_ep_free_request(struct usb_ep *ep, 71672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct usb_request *request) 71772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 71872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req = to_dwc3_request(request); 71972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 7202c4cbe6e5a9c71408b496e00a78ea9284e98af16Felipe Balbi trace_dwc3_free_request(req); 72172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi kfree(req); 72272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 72372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 724c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi/** 725c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi * dwc3_prepare_one_trb - setup one TRB from one request 726c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi * @dep: endpoint for which this request is prepared 727c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi * @req: dwc3_request pointer 728c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi */ 72968e823e24aea5227eaf20d6435485e733109d113Felipe Balbistatic void dwc3_prepare_one_trb(struct dwc3_ep *dep, 730eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi struct dwc3_request *req, dma_addr_t dma, 731e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand unsigned length, unsigned last, unsigned chain, unsigned node) 732c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi{ 733eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi struct dwc3 *dwc = dep->dwc; 734f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi struct dwc3_trb *trb; 735c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 736eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dev_vdbg(dwc->dev, "%s: req %p dma %08llx length %d%s%s\n", 737eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dep->name, req, (unsigned long long) dma, 738eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi length, last ? " last" : "", 739eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi chain ? " chain" : ""); 740eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi 741915e202aeeb59e272992a6364c910aaef3073544Pratyush Anand 742915e202aeeb59e272992a6364c910aaef3073544Pratyush Anand trb = &dep->trb_pool[dep->free_slot & DWC3_TRB_MASK]; 743c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 744eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (!req->trb) { 745eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dwc3_gadget_move_request_queued(req); 746f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi req->trb = trb; 747f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi req->trb_dma = dwc3_trb_dma_offset(dep, trb); 748e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand req->start_slot = dep->free_slot & DWC3_TRB_MASK; 749eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi } 750c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 751e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand dep->free_slot++; 7525cd8c48d95c10f729090c89757727e090719fd83Zhuang Jin Can /* Skip the LINK-TRB on ISOC */ 7535cd8c48d95c10f729090c89757727e090719fd83Zhuang Jin Can if (((dep->free_slot & DWC3_TRB_MASK) == DWC3_TRB_NUM - 1) && 7545cd8c48d95c10f729090c89757727e090719fd83Zhuang Jin Can usb_endpoint_xfer_isoc(dep->endpoint.desc)) 7555cd8c48d95c10f729090c89757727e090719fd83Zhuang Jin Can dep->free_slot++; 756e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand 757f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->size = DWC3_TRB_SIZE_LENGTH(length); 758f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->bpl = lower_32_bits(dma); 759f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->bph = upper_32_bits(dma); 760c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 76116e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz switch (usb_endpoint_type(dep->endpoint.desc)) { 762c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi case USB_ENDPOINT_XFER_CONTROL: 763f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->ctrl = DWC3_TRBCTL_CONTROL_SETUP; 764c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi break; 765c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 766c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi case USB_ENDPOINT_XFER_ISOC: 767e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if (!node) 768e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand trb->ctrl = DWC3_TRBCTL_ISOCHRONOUS_FIRST; 769e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand else 770e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand trb->ctrl = DWC3_TRBCTL_ISOCHRONOUS; 771c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi break; 772c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 773c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi case USB_ENDPOINT_XFER_BULK: 774c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi case USB_ENDPOINT_XFER_INT: 775f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->ctrl = DWC3_TRBCTL_NORMAL; 776c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi break; 777c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi default: 778c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi /* 779c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi * This is only possible with faulty memory because we 780c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi * checked it already :) 781c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi */ 782c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi BUG(); 783c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi } 784c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 785f3af36511e60669a2b5644d17378c7ea4e42d8b1Felipe Balbi if (!req->request.no_interrupt && !chain) 786f3af36511e60669a2b5644d17378c7ea4e42d8b1Felipe Balbi trb->ctrl |= DWC3_TRB_CTRL_IOC; 787f3af36511e60669a2b5644d17378c7ea4e42d8b1Felipe Balbi 78816e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if (usb_endpoint_xfer_isoc(dep->endpoint.desc)) { 789f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->ctrl |= DWC3_TRB_CTRL_ISP_IMI; 790f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->ctrl |= DWC3_TRB_CTRL_CSP; 791e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand } else if (last) { 792e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand trb->ctrl |= DWC3_TRB_CTRL_LST; 793f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi } 794c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 795e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if (chain) 796e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand trb->ctrl |= DWC3_TRB_CTRL_CHN; 797e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand 79816e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if (usb_endpoint_xfer_bulk(dep->endpoint.desc) && dep->stream_capable) 799f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->ctrl |= DWC3_TRB_CTRL_SID_SOFN(req->request.stream_id); 800c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 801f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->ctrl |= DWC3_TRB_CTRL_HWO; 8022c4cbe6e5a9c71408b496e00a78ea9284e98af16Felipe Balbi 8032c4cbe6e5a9c71408b496e00a78ea9284e98af16Felipe Balbi trace_dwc3_prepare_trb(dep, trb); 804c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi} 805c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 80672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* 80772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * dwc3_prepare_trbs - setup TRBs from requests 80872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * @dep: endpoint for which requests are being prepared 80972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * @starting: true if the endpoint is idle and no requests are queued. 81072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 8111d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * The function goes through the requests list and sets up TRBs for the 8121d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * transfers. The function returns once there are no more TRBs available or 8131d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * it runs out of requests. 81472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 81568e823e24aea5227eaf20d6435485e733109d113Felipe Balbistatic void dwc3_prepare_trbs(struct dwc3_ep *dep, bool starting) 81672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 81768e823e24aea5227eaf20d6435485e733109d113Felipe Balbi struct dwc3_request *req, *n; 81872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 trbs_left; 8198d62cd65d74d0e241b3a152f7347bb66126b705bPaul Zimmerman u32 max; 820c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi unsigned int last_one = 0; 82172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 82272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi BUILD_BUG_ON_NOT_POWER_OF_2(DWC3_TRB_NUM); 82372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 82472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* the first request must not be queued */ 82572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trbs_left = (dep->busy_slot - dep->free_slot) & DWC3_TRB_MASK; 826c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 8278d62cd65d74d0e241b3a152f7347bb66126b705bPaul Zimmerman /* Can't wrap around on a non-isoc EP since there's no link TRB */ 82816e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if (!usb_endpoint_xfer_isoc(dep->endpoint.desc)) { 8298d62cd65d74d0e241b3a152f7347bb66126b705bPaul Zimmerman max = DWC3_TRB_NUM - (dep->free_slot & DWC3_TRB_MASK); 8308d62cd65d74d0e241b3a152f7347bb66126b705bPaul Zimmerman if (trbs_left > max) 8318d62cd65d74d0e241b3a152f7347bb66126b705bPaul Zimmerman trbs_left = max; 8328d62cd65d74d0e241b3a152f7347bb66126b705bPaul Zimmerman } 8338d62cd65d74d0e241b3a152f7347bb66126b705bPaul Zimmerman 83472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 8351d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * If busy & slot are equal than it is either full or empty. If we are 8361d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * starting to process requests then we are empty. Otherwise we are 83772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * full and don't do anything 83872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 83972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!trbs_left) { 84072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!starting) 84168e823e24aea5227eaf20d6435485e733109d113Felipe Balbi return; 84272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trbs_left = DWC3_TRB_NUM; 84372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 84472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * In case we start from scratch, we queue the ISOC requests 84572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * starting from slot 1. This is done because we use ring 84672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * buffer and have no LST bit to stop us. Instead, we place 8471d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * IOC bit every TRB_NUM/4. We try to avoid having an interrupt 84872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * after the first request so we start at slot 1 and have 84972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 7 requests proceed before we hit the first IOC. 85072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Other transfer types don't use the ring buffer and are 85172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * processed from the first TRB until the last one. Since we 85272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * don't wrap around we have to start at the beginning. 85372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 85416e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if (usb_endpoint_xfer_isoc(dep->endpoint.desc)) { 85572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->busy_slot = 1; 85672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->free_slot = 1; 85772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 85872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->busy_slot = 0; 85972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->free_slot = 0; 86072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 86172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 86272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 86372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* The last TRB is a link TRB, not used for xfer */ 86416e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if ((trbs_left <= 1) && usb_endpoint_xfer_isoc(dep->endpoint.desc)) 86568e823e24aea5227eaf20d6435485e733109d113Felipe Balbi return; 86672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 86772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_for_each_entry_safe(req, n, &dep->request_list, list) { 868eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi unsigned length; 869eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dma_addr_t dma; 870e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand last_one = false; 87172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 872eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (req->request.num_mapped_sgs > 0) { 873eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi struct usb_request *request = &req->request; 874eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi struct scatterlist *sg = request->sg; 875eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi struct scatterlist *s; 876eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi int i; 87772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 878eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi for_each_sg(sg, s, request->num_mapped_sgs, i) { 879eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi unsigned chain = true; 88072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 881eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi length = sg_dma_len(s); 882eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dma = sg_dma_address(s); 88372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 8841d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman if (i == (request->num_mapped_sgs - 1) || 8851d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman sg_is_last(s)) { 886e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if (list_is_last(&req->list, 887e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand &dep->request_list)) 888e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand last_one = true; 889eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi chain = false; 890eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi } 89172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 892eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi trbs_left--; 893eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (!trbs_left) 894eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi last_one = true; 89572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 896eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (last_one) 897eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi chain = false; 89872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 899eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dwc3_prepare_one_trb(dep, req, dma, length, 900e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand last_one, chain, i); 90172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 902eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (last_one) 903eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi break; 904eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi } 90572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 906eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dma = req->request.dma; 907eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi length = req->request.length; 908eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi trbs_left--; 90972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 910eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (!trbs_left) 911eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi last_one = 1; 912879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi 913eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi /* Is this the last request? */ 914eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (list_is_last(&req->list, &dep->request_list)) 915eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi last_one = 1; 91672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 917eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dwc3_prepare_one_trb(dep, req, dma, length, 918e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand last_one, false, 0); 91972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 920eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (last_one) 921eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi break; 92272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 92372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 92472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 92572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 92672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int __dwc3_gadget_kick_transfer(struct dwc3_ep *dep, u16 cmd_param, 92772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int start_new) 92872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 92972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 93072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req; 93172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 93272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 93372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 cmd; 93472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 93572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (start_new && (dep->flags & DWC3_EP_BUSY)) { 93672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s: endpoint busy\n", dep->name); 93772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EBUSY; 93872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 93972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags &= ~DWC3_EP_PENDING_REQUEST; 94072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 94172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 94272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * If we are getting here after a short-out-packet we don't enqueue any 94372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * new requests as we try to set the IOC bit only on the last request. 94472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 94572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (start_new) { 94672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (list_empty(&dep->req_queued)) 94772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_prepare_trbs(dep, start_new); 94872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 94972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* req points to the first request which will be sent */ 95072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req = next_request(&dep->req_queued); 95172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 95268e823e24aea5227eaf20d6435485e733109d113Felipe Balbi dwc3_prepare_trbs(dep, start_new); 95368e823e24aea5227eaf20d6435485e733109d113Felipe Balbi 95472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 9551d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * req points to the first request where HWO changed from 0 to 1 95672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 95768e823e24aea5227eaf20d6435485e733109d113Felipe Balbi req = next_request(&dep->req_queued); 95872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 95972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!req) { 96072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags |= DWC3_EP_PENDING_REQUEST; 96172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 96272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 96372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 96472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0, sizeof(params)); 96572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 9661877d6c9a57802d50a059cf2dacdba10168cece7Pratyush Anand if (start_new) { 9671877d6c9a57802d50a059cf2dacdba10168cece7Pratyush Anand params.param0 = upper_32_bits(req->trb_dma); 9681877d6c9a57802d50a059cf2dacdba10168cece7Pratyush Anand params.param1 = lower_32_bits(req->trb_dma); 96972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd = DWC3_DEPCMD_STARTTRANSFER; 9701877d6c9a57802d50a059cf2dacdba10168cece7Pratyush Anand } else { 97172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd = DWC3_DEPCMD_UPDATETRANSFER; 9721877d6c9a57802d50a059cf2dacdba10168cece7Pratyush Anand } 97372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 97472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd |= DWC3_DEPCMD_PARAM(cmd_param); 97572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, cmd, ¶ms); 97672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret < 0) { 97772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "failed to send STARTTRANSFER command\n"); 97872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 97972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 98072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * FIXME we need to iterate over the list of requests 98172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * here and stop, unmap, free and del each of the linked 9821d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * requests instead of what we do now. 98372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 9840fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi usb_gadget_unmap_request(&dwc->gadget, &req->request, 9850fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi req->direction); 98672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_del(&req->list); 98772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 98872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 98972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 99072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags |= DWC3_EP_BUSY; 99125b8ff68bf1d4954d4a9dcb4862c6b6a53cb09e2Felipe Balbi 992f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman if (start_new) { 993b4996a8631e80a2aaddb5c487ff6b9ad37315f70Felipe Balbi dep->resource_index = dwc3_gadget_ep_get_transfer_index(dwc, 994f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman dep->number); 995b4996a8631e80a2aaddb5c487ff6b9ad37315f70Felipe Balbi WARN_ON_ONCE(!dep->resource_index); 996f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman } 99725b8ff68bf1d4954d4a9dcb4862c6b6a53cb09e2Felipe Balbi 99872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 99972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 100072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1001d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anandstatic void __dwc3_gadget_start_isoc(struct dwc3 *dwc, 1002d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand struct dwc3_ep *dep, u32 cur_uf) 1003d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand{ 1004d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand u32 uf; 1005d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand 1006d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand if (list_empty(&dep->request_list)) { 1007d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand dev_vdbg(dwc->dev, "ISOC ep %s run out for requests.\n", 1008d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand dep->name); 1009f4a53c55117b82e895ec98b1765c9d66940377fcPratyush Anand dep->flags |= DWC3_EP_PENDING_REQUEST; 1010d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand return; 1011d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand } 1012d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand 1013d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand /* 4 micro frames in the future */ 1014d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand uf = cur_uf + dep->interval * 4; 1015d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand 1016d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand __dwc3_gadget_kick_transfer(dep, uf, 1); 1017d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand} 1018d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand 1019d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anandstatic void dwc3_gadget_start_isoc(struct dwc3 *dwc, 1020d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand struct dwc3_ep *dep, const struct dwc3_event_depevt *event) 1021d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand{ 1022d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand u32 cur_uf, mask; 1023d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand 1024d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand mask = ~(dep->interval - 1); 1025d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand cur_uf = event->parameters & mask; 1026d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand 1027d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand __dwc3_gadget_start_isoc(dwc, dep, cur_uf); 1028d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand} 1029d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand 103072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int __dwc3_gadget_ep_queue(struct dwc3_ep *dep, struct dwc3_request *req) 103172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 10320fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi struct dwc3 *dwc = dep->dwc; 10330fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi int ret; 10340fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi 103572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.actual = 0; 103672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.status = -EINPROGRESS; 103772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->direction = dep->direction; 103872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->epnum = dep->number; 103972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 104072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 104172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We only add to our list of requests now and 104272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * start consuming the list once we get XferNotReady 104372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * IRQ. 104472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 104572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * That way, we avoid doing anything that we don't need 104672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * to do now and defer it until the point we receive a 104772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * particular token from the Host side. 104872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 104972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * This will also avoid Host cancelling URBs due to too 10501d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * many NAKs. 105172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 10520fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi ret = usb_gadget_map_request(&dwc->gadget, &req->request, 10530fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi dep->direction); 10540fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi if (ret) 10550fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi return ret; 10560fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi 105772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_add_tail(&req->list, &dep->request_list); 105872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 105972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 1060b511e5e76bf488cd3eec1048483a3898393a4dcaFelipe Balbi * There are a few special cases: 106172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 1062f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman * 1. XferNotReady with empty list of requests. We need to kick the 1063f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman * transfer here in that situation, otherwise we will be NAKing 1064f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman * forever. If we get XferNotReady before gadget driver has a 1065f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman * chance to queue a request, we will ACK the IRQ but won't be 1066f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman * able to receive the data until the next request is queued. 1067f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman * The following code is handling exactly that. 106872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 106972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 107072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->flags & DWC3_EP_PENDING_REQUEST) { 1071f4a53c55117b82e895ec98b1765c9d66940377fcPratyush Anand /* 1072f4a53c55117b82e895ec98b1765c9d66940377fcPratyush Anand * If xfernotready is already elapsed and it is a case 1073f4a53c55117b82e895ec98b1765c9d66940377fcPratyush Anand * of isoc transfer, then issue END TRANSFER, so that 1074f4a53c55117b82e895ec98b1765c9d66940377fcPratyush Anand * you can receive xfernotready again and can have 1075f4a53c55117b82e895ec98b1765c9d66940377fcPratyush Anand * notion of current microframe. 1076f4a53c55117b82e895ec98b1765c9d66940377fcPratyush Anand */ 1077f4a53c55117b82e895ec98b1765c9d66940377fcPratyush Anand if (usb_endpoint_xfer_isoc(dep->endpoint.desc)) { 1078cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand if (list_empty(&dep->req_queued)) { 1079b992e6813e257269e9599ca07be8bd52df784bf5Paul Zimmerman dwc3_stop_active_transfer(dwc, dep->number, true); 1080cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand dep->flags = DWC3_EP_ENABLED; 1081cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand } 1082f4a53c55117b82e895ec98b1765c9d66940377fcPratyush Anand return 0; 1083f4a53c55117b82e895ec98b1765c9d66940377fcPratyush Anand } 1084f4a53c55117b82e895ec98b1765c9d66940377fcPratyush Anand 1085b511e5e76bf488cd3eec1048483a3898393a4dcaFelipe Balbi ret = __dwc3_gadget_kick_transfer(dep, 0, true); 1086348e026fafe2501281db5fb7fed599b337cad358Moiz Sonasath if (ret && ret != -EBUSY) 1087b511e5e76bf488cd3eec1048483a3898393a4dcaFelipe Balbi dev_dbg(dwc->dev, "%s: failed to kick transfers\n", 1088b511e5e76bf488cd3eec1048483a3898393a4dcaFelipe Balbi dep->name); 108915f86bde29f0fdfb877d9c753547fa2e2f5ef1fePratyush Anand return ret; 1090b511e5e76bf488cd3eec1048483a3898393a4dcaFelipe Balbi } 109172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1092b511e5e76bf488cd3eec1048483a3898393a4dcaFelipe Balbi /* 1093b511e5e76bf488cd3eec1048483a3898393a4dcaFelipe Balbi * 2. XferInProgress on Isoc EP with an active transfer. We need to 1094b511e5e76bf488cd3eec1048483a3898393a4dcaFelipe Balbi * kick the transfer here after queuing a request, otherwise the 1095b511e5e76bf488cd3eec1048483a3898393a4dcaFelipe Balbi * core may not see the modified TRB(s). 1096b511e5e76bf488cd3eec1048483a3898393a4dcaFelipe Balbi */ 1097b511e5e76bf488cd3eec1048483a3898393a4dcaFelipe Balbi if (usb_endpoint_xfer_isoc(dep->endpoint.desc) && 109879c9046ec52b5aaa9f055e3d928d676dd37a6f9dPratyush Anand (dep->flags & DWC3_EP_BUSY) && 109979c9046ec52b5aaa9f055e3d928d676dd37a6f9dPratyush Anand !(dep->flags & DWC3_EP_MISSED_ISOC)) { 1100b4996a8631e80a2aaddb5c487ff6b9ad37315f70Felipe Balbi WARN_ON_ONCE(!dep->resource_index); 1101b4996a8631e80a2aaddb5c487ff6b9ad37315f70Felipe Balbi ret = __dwc3_gadget_kick_transfer(dep, dep->resource_index, 1102b511e5e76bf488cd3eec1048483a3898393a4dcaFelipe Balbi false); 1103348e026fafe2501281db5fb7fed599b337cad358Moiz Sonasath if (ret && ret != -EBUSY) 110472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "%s: failed to kick transfers\n", 110572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 110615f86bde29f0fdfb877d9c753547fa2e2f5ef1fePratyush Anand return ret; 1107a092532483e3200a53c8b1170b3988cc668c07efFelipe Balbi } 110872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1109b997ada5db905e24494bcc689c7b2c07d278ca27Felipe Balbi /* 1110b997ada5db905e24494bcc689c7b2c07d278ca27Felipe Balbi * 4. Stream Capable Bulk Endpoints. We need to start the transfer 1111b997ada5db905e24494bcc689c7b2c07d278ca27Felipe Balbi * right away, otherwise host will not know we have streams to be 1112b997ada5db905e24494bcc689c7b2c07d278ca27Felipe Balbi * handled. 1113b997ada5db905e24494bcc689c7b2c07d278ca27Felipe Balbi */ 1114b997ada5db905e24494bcc689c7b2c07d278ca27Felipe Balbi if (dep->stream_capable) { 1115b997ada5db905e24494bcc689c7b2c07d278ca27Felipe Balbi int ret; 1116b997ada5db905e24494bcc689c7b2c07d278ca27Felipe Balbi 1117b997ada5db905e24494bcc689c7b2c07d278ca27Felipe Balbi ret = __dwc3_gadget_kick_transfer(dep, 0, true); 1118b997ada5db905e24494bcc689c7b2c07d278ca27Felipe Balbi if (ret && ret != -EBUSY) { 1119b997ada5db905e24494bcc689c7b2c07d278ca27Felipe Balbi struct dwc3 *dwc = dep->dwc; 1120b997ada5db905e24494bcc689c7b2c07d278ca27Felipe Balbi 1121b997ada5db905e24494bcc689c7b2c07d278ca27Felipe Balbi dev_dbg(dwc->dev, "%s: failed to kick transfers\n", 1122b997ada5db905e24494bcc689c7b2c07d278ca27Felipe Balbi dep->name); 1123b997ada5db905e24494bcc689c7b2c07d278ca27Felipe Balbi } 1124b997ada5db905e24494bcc689c7b2c07d278ca27Felipe Balbi } 1125b997ada5db905e24494bcc689c7b2c07d278ca27Felipe Balbi 112672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 112772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 112872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 112972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_queue(struct usb_ep *ep, struct usb_request *request, 113072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi gfp_t gfp_flags) 113172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 113272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req = to_dwc3_request(request); 113372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = to_dwc3_ep(ep); 113472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 113572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 113672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 113772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 113872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 113972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1140fdee4ebac96bb44c9c488fdd830b7cc831cd295dZhuang Jin Can spin_lock_irqsave(&dwc->lock, flags); 114116e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if (!dep->endpoint.desc) { 114272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "trying to queue request %p to disabled %s\n", 114372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi request, ep->name); 1144fdee4ebac96bb44c9c488fdd830b7cc831cd295dZhuang Jin Can spin_unlock_irqrestore(&dwc->lock, flags); 114572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -ESHUTDOWN; 114672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 114772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 114872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "queing request %p to %s length %d\n", 114972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi request, ep->name, request->length); 11502c4cbe6e5a9c71408b496e00a78ea9284e98af16Felipe Balbi trace_dwc3_ep_queue(req); 115172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 115272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = __dwc3_gadget_ep_queue(dep, req); 115372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 115472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 115572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 115672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 115772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 115872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_dequeue(struct usb_ep *ep, 115972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct usb_request *request) 116072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 116172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req = to_dwc3_request(request); 116272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *r = NULL; 116372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 116472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = to_dwc3_ep(ep); 116572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 116672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 116772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 116872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret = 0; 116972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 11702c4cbe6e5a9c71408b496e00a78ea9284e98af16Felipe Balbi trace_dwc3_ep_dequeue(req); 11712c4cbe6e5a9c71408b496e00a78ea9284e98af16Felipe Balbi 117272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 117372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 117472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_for_each_entry(r, &dep->request_list, list) { 117572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (r == req) 117672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 117772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 117872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 117972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (r != req) { 118072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_for_each_entry(r, &dep->req_queued, list) { 118172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (r == req) 118272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 118372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 118472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (r == req) { 118572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* wait until it is processed */ 1186b992e6813e257269e9599ca07be8bd52df784bf5Paul Zimmerman dwc3_stop_active_transfer(dwc, dep->number, true); 1187e8d4e8be860d935099ffcf695dcd29b55ae50b36Pratyush Anand goto out1; 118872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 118972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "request %p was not queued to %s\n", 119072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi request, ep->name); 119172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EINVAL; 119272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto out0; 119372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 119472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1195e8d4e8be860d935099ffcf695dcd29b55ae50b36Pratyush Anandout1: 119672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* giveback the request */ 119772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_giveback(dep, req, -ECONNRESET); 119872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 119972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiout0: 120072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 120172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 120272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 120372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 120472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 120572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiint __dwc3_gadget_ep_set_halt(struct dwc3_ep *dep, int value) 120672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 120772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 120872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 120972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 121072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 121172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0x00, sizeof(params)); 121272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 121372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (value) { 121472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, 121572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEPCMD_SETSTALL, ¶ms); 121672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 12173f89204bae896e1d44468886a646b84acadc3c8fDan Carpenter dev_err(dwc->dev, "failed to set STALL on %s\n", 121872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 121972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi else 122072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags |= DWC3_EP_STALL; 122172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 122272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, 122372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEPCMD_CLEARSTALL, ¶ms); 122472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 12253f89204bae896e1d44468886a646b84acadc3c8fDan Carpenter dev_err(dwc->dev, "failed to clear STALL on %s\n", 122672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 122772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi else 1228a535d81c92615b8ffb99b7e1fd1fb01effaed1afAlan Stern dep->flags &= ~(DWC3_EP_STALL | DWC3_EP_WEDGE); 122972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 12305275455a6e6ae6b57303834b0afd267bb9657ffcPaul Zimmerman 123172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 123272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 123372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 123472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_set_halt(struct usb_ep *ep, int value) 123572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 123672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = to_dwc3_ep(ep); 123772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 123872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 123972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 124072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 124172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 124272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 124372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 124472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 124516e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if (usb_endpoint_xfer_isoc(dep->endpoint.desc)) { 124672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "%s is of Isochronous type\n", dep->name); 124772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EINVAL; 124872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto out; 124972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 125072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 125172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = __dwc3_gadget_ep_set_halt(dep, value); 125272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiout: 125372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 125472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 125572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 125672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 125772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 125872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_set_wedge(struct usb_ep *ep) 125972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 126072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = to_dwc3_ep(ep); 1261249a456930cd2df29d085fb738b0e8f4bc1680cfPaul Zimmerman struct dwc3 *dwc = dep->dwc; 1262249a456930cd2df29d085fb738b0e8f4bc1680cfPaul Zimmerman unsigned long flags; 126372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1264249a456930cd2df29d085fb738b0e8f4bc1680cfPaul Zimmerman spin_lock_irqsave(&dwc->lock, flags); 126572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags |= DWC3_EP_WEDGE; 1266249a456930cd2df29d085fb738b0e8f4bc1680cfPaul Zimmerman spin_unlock_irqrestore(&dwc->lock, flags); 126772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 126808f0d96670c53898b4154e7945e77cdd966003f7Pratyush Anand if (dep->number == 0 || dep->number == 1) 126908f0d96670c53898b4154e7945e77cdd966003f7Pratyush Anand return dwc3_gadget_ep0_set_halt(ep, 1); 127008f0d96670c53898b4154e7945e77cdd966003f7Pratyush Anand else 127108f0d96670c53898b4154e7945e77cdd966003f7Pratyush Anand return dwc3_gadget_ep_set_halt(ep, 1); 127272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 127372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 127472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 127572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 127672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic struct usb_endpoint_descriptor dwc3_gadget_ep0_desc = { 127772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .bLength = USB_DT_ENDPOINT_SIZE, 127872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .bDescriptorType = USB_DT_ENDPOINT, 127972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .bmAttributes = USB_ENDPOINT_XFER_CONTROL, 128072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi}; 128172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 128272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic const struct usb_ep_ops dwc3_gadget_ep0_ops = { 128372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .enable = dwc3_gadget_ep0_enable, 128472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .disable = dwc3_gadget_ep0_disable, 128572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .alloc_request = dwc3_gadget_ep_alloc_request, 128672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .free_request = dwc3_gadget_ep_free_request, 128772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .queue = dwc3_gadget_ep0_queue, 128872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .dequeue = dwc3_gadget_ep_dequeue, 128908f0d96670c53898b4154e7945e77cdd966003f7Pratyush Anand .set_halt = dwc3_gadget_ep0_set_halt, 129072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .set_wedge = dwc3_gadget_ep_set_wedge, 129172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi}; 129272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 129372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic const struct usb_ep_ops dwc3_gadget_ep_ops = { 129472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .enable = dwc3_gadget_ep_enable, 129572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .disable = dwc3_gadget_ep_disable, 129672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .alloc_request = dwc3_gadget_ep_alloc_request, 129772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .free_request = dwc3_gadget_ep_free_request, 129872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .queue = dwc3_gadget_ep_queue, 129972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .dequeue = dwc3_gadget_ep_dequeue, 130072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .set_halt = dwc3_gadget_ep_set_halt, 130172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .set_wedge = dwc3_gadget_ep_set_wedge, 130272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi}; 130372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 130472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 130572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 130672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_get_frame(struct usb_gadget *g) 130772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 130872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 130972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 131072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 131172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 131272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return DWC3_DSTS_SOFFN(reg); 131372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 131472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 131572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_wakeup(struct usb_gadget *g) 131672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 131772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 131872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 131972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long timeout; 132072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 132172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 132272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 132372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 132472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret = 0; 132572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 132672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 link_state; 132772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 speed; 132872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 132972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 133072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 133172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 133272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * According to the Databook Remote wakeup request should 133372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * be issued only when the device is in early suspend state. 133472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 133572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We can check that via USB Link State bits in DSTS register. 133672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 133772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 133872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 133972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi speed = reg & DWC3_DSTS_CONNECTSPD; 134072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (speed == DWC3_DSTS_SUPERSPEED) { 134172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "no wakeup on SuperSpeed\n"); 134272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EINVAL; 134372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto out; 134472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 134572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 134672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi link_state = DWC3_DSTS_USBLNKST(reg); 134772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 134872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (link_state) { 134972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_LINK_STATE_RX_DET: /* in HS, means Early Suspend */ 135072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_LINK_STATE_U3: /* in HS, means SUSPEND */ 135172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 135272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 135372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "can't wakeup from link state %d\n", 135472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi link_state); 135572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EINVAL; 135672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto out; 135772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 135872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 13598598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi ret = dwc3_gadget_set_link_state(dwc, DWC3_LINK_STATE_RECOV); 13608598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi if (ret < 0) { 13618598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi dev_err(dwc->dev, "failed to put link in Recovery\n"); 13628598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi goto out; 13638598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi } 136472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1365802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman /* Recent versions do this automatically */ 1366802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman if (dwc->revision < DWC3_REVISION_194A) { 1367802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman /* write zeroes to Link Change Request */ 1368fcc023c726b5879d8f3f0f0f48c45d09055272c4Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 1369802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman reg &= ~DWC3_DCTL_ULSTCHNGREQ_MASK; 1370802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman dwc3_writel(dwc->regs, DWC3_DCTL, reg); 1371802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman } 137272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 13731d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman /* poll until Link State changes to ON */ 137472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi timeout = jiffies + msecs_to_jiffies(100); 137572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 13761d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman while (!time_after(jiffies, timeout)) { 137772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 137872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 137972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* in HS, means ON */ 138072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (DWC3_DSTS_USBLNKST(reg) == DWC3_LINK_STATE_U0) 138172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 138272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 138372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 138472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (DWC3_DSTS_USBLNKST(reg) != DWC3_LINK_STATE_U0) { 138572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to send remote wakeup\n"); 138672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EINVAL; 138772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 138872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 138972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiout: 139072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 139172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 139272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 139372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 139472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 139572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_set_selfpowered(struct usb_gadget *g, 139672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int is_selfpowered) 139772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 139872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 1399249a456930cd2df29d085fb738b0e8f4bc1680cfPaul Zimmerman unsigned long flags; 140072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1401249a456930cd2df29d085fb738b0e8f4bc1680cfPaul Zimmerman spin_lock_irqsave(&dwc->lock, flags); 140272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->is_selfpowered = !!is_selfpowered; 1403249a456930cd2df29d085fb738b0e8f4bc1680cfPaul Zimmerman spin_unlock_irqrestore(&dwc->lock, flags); 140472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 140572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 140672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 140772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 14087b2a0368bbc9bc4a7936d8587eaff4b8c35b2247Felipe Balbistatic int dwc3_gadget_run_stop(struct dwc3 *dwc, int is_on, int suspend) 140972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 141072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 141161d58242f634642de42d6a4098913b7254a65053Sebastian Andrzej Siewior u32 timeout = 500; 141272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 141372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 14148db7ed15f2557e26371e4b2d98fee290d992b715Felipe Balbi if (is_on) { 1415802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman if (dwc->revision <= DWC3_REVISION_187A) { 1416802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman reg &= ~DWC3_DCTL_TRGTULST_MASK; 1417802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman reg |= DWC3_DCTL_TRGTULST_RX_DET; 1418802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman } 1419802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman 1420802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman if (dwc->revision >= DWC3_REVISION_194A) 1421802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman reg &= ~DWC3_DCTL_KEEP_CONNECT; 1422802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman reg |= DWC3_DCTL_RUN_STOP; 14237b2a0368bbc9bc4a7936d8587eaff4b8c35b2247Felipe Balbi 14247b2a0368bbc9bc4a7936d8587eaff4b8c35b2247Felipe Balbi if (dwc->has_hibernation) 14257b2a0368bbc9bc4a7936d8587eaff4b8c35b2247Felipe Balbi reg |= DWC3_DCTL_KEEP_CONNECT; 14267b2a0368bbc9bc4a7936d8587eaff4b8c35b2247Felipe Balbi 14279fcb3bd8d12db29c101d3722d37ddef9d1915317Felipe Balbi dwc->pullups_connected = true; 14288db7ed15f2557e26371e4b2d98fee290d992b715Felipe Balbi } else { 142972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DCTL_RUN_STOP; 14307b2a0368bbc9bc4a7936d8587eaff4b8c35b2247Felipe Balbi 14317b2a0368bbc9bc4a7936d8587eaff4b8c35b2247Felipe Balbi if (dwc->has_hibernation && !suspend) 14327b2a0368bbc9bc4a7936d8587eaff4b8c35b2247Felipe Balbi reg &= ~DWC3_DCTL_KEEP_CONNECT; 14337b2a0368bbc9bc4a7936d8587eaff4b8c35b2247Felipe Balbi 14349fcb3bd8d12db29c101d3722d37ddef9d1915317Felipe Balbi dwc->pullups_connected = false; 14358db7ed15f2557e26371e4b2d98fee290d992b715Felipe Balbi } 143672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 143772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 143872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 143972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi do { 144072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 144172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (is_on) { 144272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(reg & DWC3_DSTS_DEVCTRLHLT)) 144372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 144472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 144572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (reg & DWC3_DSTS_DEVCTRLHLT) 144672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 144772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 144872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi timeout--; 144972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!timeout) 14506f17f74b3d8345663f5fcfd834145685110075bdPratyush Anand return -ETIMEDOUT; 145161d58242f634642de42d6a4098913b7254a65053Sebastian Andrzej Siewior udelay(1); 145272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } while (1); 145372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 145472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "gadget %s data soft-%s\n", 145572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver 145672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ? dwc->gadget_driver->function : "no-function", 145772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi is_on ? "connect" : "disconnect"); 14586f17f74b3d8345663f5fcfd834145685110075bdPratyush Anand 14596f17f74b3d8345663f5fcfd834145685110075bdPratyush Anand return 0; 146072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 146172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 146272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_pullup(struct usb_gadget *g, int is_on) 146372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 146472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 146572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 14666f17f74b3d8345663f5fcfd834145685110075bdPratyush Anand int ret; 146772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 146872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi is_on = !!is_on; 146972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 147072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 14717b2a0368bbc9bc4a7936d8587eaff4b8c35b2247Felipe Balbi ret = dwc3_gadget_run_stop(dwc, is_on, false); 147272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 147372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 14746f17f74b3d8345663f5fcfd834145685110075bdPratyush Anand return ret; 147572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 147672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 14778698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbistatic void dwc3_gadget_enable_irq(struct dwc3 *dwc) 14788698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi{ 14798698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi u32 reg; 14808698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi 14818698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi /* Enable all but Start and End of Frame IRQs */ 14828698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi reg = (DWC3_DEVTEN_VNDRDEVTSTRCVEDEN | 14838698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi DWC3_DEVTEN_EVNTOVERFLOWEN | 14848698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi DWC3_DEVTEN_CMDCMPLTEN | 14858698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi DWC3_DEVTEN_ERRTICERREN | 14868698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi DWC3_DEVTEN_WKUPEVTEN | 14878698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi DWC3_DEVTEN_ULSTCNGEN | 14888698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi DWC3_DEVTEN_CONNECTDONEEN | 14898698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi DWC3_DEVTEN_USBRSTEN | 14908698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi DWC3_DEVTEN_DISCONNEVTEN); 14918698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi 14928698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEVTEN, reg); 14938698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi} 14948698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi 14958698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbistatic void dwc3_gadget_disable_irq(struct dwc3 *dwc) 14968698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi{ 14978698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi /* mask all interrupts */ 14988698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEVTEN, 0x00); 14998698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi} 15008698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi 15018698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbistatic irqreturn_t dwc3_interrupt(int irq, void *_dwc); 1502b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbistatic irqreturn_t dwc3_thread_interrupt(int irq, void *_dwc); 15038698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi 150472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_start(struct usb_gadget *g, 150572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct usb_gadget_driver *driver) 150672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 150772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 150872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 150972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 151072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret = 0; 15118698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi int irq; 151272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 151372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1514b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi irq = platform_get_irq(to_platform_device(dwc->dev), 0); 1515b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi ret = request_threaded_irq(irq, dwc3_interrupt, dwc3_thread_interrupt, 1516e8adfc30ff9282a728fd8b666b6418308164c415Felipe Balbi IRQF_SHARED, "dwc3", dwc); 1517b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi if (ret) { 1518b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi dev_err(dwc->dev, "failed to request irq #%d --> %d\n", 1519b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi irq, ret); 1520b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi goto err0; 1521b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi } 1522b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi 152372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 152472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 152572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dwc->gadget_driver) { 152672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "%s is already bound to %s\n", 152772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.name, 152872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver->driver.name); 152972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EBUSY; 1530b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi goto err1; 153172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 153272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 153372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver = driver; 153472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 153572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCFG); 153672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~(DWC3_DCFG_SPEED_MASK); 153707e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi 153807e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi /** 153907e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * WORKAROUND: DWC3 revision < 2.20a have an issue 154007e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * which would cause metastability state on Run/Stop 154107e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * bit if we try to force the IP to USB2-only mode. 154207e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * 154307e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * Because of that, we cannot configure the IP to any 154407e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * speed other than the SuperSpeed 154507e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * 154607e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * Refers to: 154707e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * 154807e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * STAR#9000525659: Clock Domain Crossing on DCTL in 154907e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * USB 2.0 Mode 155007e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi */ 1551f7e846f0956917888b28b52726ee8779a39d84b6Felipe Balbi if (dwc->revision < DWC3_REVISION_220A) { 155207e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi reg |= DWC3_DCFG_SUPERSPEED; 1553f7e846f0956917888b28b52726ee8779a39d84b6Felipe Balbi } else { 1554f7e846f0956917888b28b52726ee8779a39d84b6Felipe Balbi switch (dwc->maximum_speed) { 1555f7e846f0956917888b28b52726ee8779a39d84b6Felipe Balbi case USB_SPEED_LOW: 1556f7e846f0956917888b28b52726ee8779a39d84b6Felipe Balbi reg |= DWC3_DSTS_LOWSPEED; 1557f7e846f0956917888b28b52726ee8779a39d84b6Felipe Balbi break; 1558f7e846f0956917888b28b52726ee8779a39d84b6Felipe Balbi case USB_SPEED_FULL: 1559f7e846f0956917888b28b52726ee8779a39d84b6Felipe Balbi reg |= DWC3_DSTS_FULLSPEED1; 1560f7e846f0956917888b28b52726ee8779a39d84b6Felipe Balbi break; 1561f7e846f0956917888b28b52726ee8779a39d84b6Felipe Balbi case USB_SPEED_HIGH: 1562f7e846f0956917888b28b52726ee8779a39d84b6Felipe Balbi reg |= DWC3_DSTS_HIGHSPEED; 1563f7e846f0956917888b28b52726ee8779a39d84b6Felipe Balbi break; 1564f7e846f0956917888b28b52726ee8779a39d84b6Felipe Balbi case USB_SPEED_SUPER: /* FALLTHROUGH */ 1565f7e846f0956917888b28b52726ee8779a39d84b6Felipe Balbi case USB_SPEED_UNKNOWN: /* FALTHROUGH */ 1566f7e846f0956917888b28b52726ee8779a39d84b6Felipe Balbi default: 1567f7e846f0956917888b28b52726ee8779a39d84b6Felipe Balbi reg |= DWC3_DSTS_SUPERSPEED; 1568f7e846f0956917888b28b52726ee8779a39d84b6Felipe Balbi } 1569f7e846f0956917888b28b52726ee8779a39d84b6Felipe Balbi } 157072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCFG, reg); 157172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1572b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman dwc->start_config_issued = false; 1573b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman 157472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* Start with SuperSpeed Default */ 157572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(512); 157672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 157772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[0]; 1578265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL, false, 1579265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman false); 158072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 158172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to enable %s\n", dep->name); 1582b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi goto err2; 158372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 158472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 158572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[1]; 1586265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL, false, 1587265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman false); 158872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 158972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to enable %s\n", dep->name); 1590b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi goto err3; 159172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 159272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 159372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* begin to receive SETUP packets */ 1594c7fcdeb2627c46b7ec3f0bcb2054b10405f9a70eFelipe Balbi dwc->ep0state = EP0_SETUP_PHASE; 159572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_ep0_out_start(dwc); 159672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 15978698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi dwc3_gadget_enable_irq(dwc); 15988698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi 159972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 160072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 160172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 160272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1603b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbierr3: 160472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi __dwc3_gadget_ep_disable(dwc->eps[0]); 160572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1606b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbierr2: 1607cdcedd6981194e511cc206887db661d016069d68Felipe Balbi dwc->gadget_driver = NULL; 1608b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi 1609b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbierr1: 161072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 161172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1612b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi free_irq(irq, dwc); 1613b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi 1614b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbierr0: 161572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 161672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 161772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 161872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_stop(struct usb_gadget *g, 161972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct usb_gadget_driver *driver) 162072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 162172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 162272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 16238698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi int irq; 162472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 162572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 162672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 16278698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi dwc3_gadget_disable_irq(dwc); 162872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi __dwc3_gadget_ep_disable(dwc->eps[0]); 162972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi __dwc3_gadget_ep_disable(dwc->eps[1]); 163072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 163172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver = NULL; 163272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 163372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 163472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1635b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi irq = platform_get_irq(to_platform_device(dwc->dev), 0); 1636b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi free_irq(irq, dwc); 1637b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi 163872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 163972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 1640802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman 164172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic const struct usb_gadget_ops dwc3_gadget_ops = { 164272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .get_frame = dwc3_gadget_get_frame, 164372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .wakeup = dwc3_gadget_wakeup, 164472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .set_selfpowered = dwc3_gadget_set_selfpowered, 164572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .pullup = dwc3_gadget_pullup, 164672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .udc_start = dwc3_gadget_start, 164772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .udc_stop = dwc3_gadget_stop, 164872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi}; 164972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 165072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 165172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 16526a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbistatic int dwc3_gadget_init_hw_endpoints(struct dwc3 *dwc, 16536a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi u8 num, u32 direction) 165472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 165572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 16566a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi u8 i; 165772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 16586a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi for (i = 0; i < num; i++) { 16596a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi u8 epnum = (i << 1) | (!!direction); 166072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 166172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = kzalloc(sizeof(*dep), GFP_KERNEL); 1662734d5a5393ed8eedf70f13c7078cb4a6134f49f2Jingoo Han if (!dep) 166372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -ENOMEM; 166472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 166572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->dwc = dwc; 166672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->number = epnum; 16679aa62ae4292a2450634345d79a7fa1461bf7b39cFelipe Balbi dep->direction = !!direction; 166872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->eps[epnum] = dep; 166972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 167072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi snprintf(dep->name, sizeof(dep->name), "ep%d%s", epnum >> 1, 167172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi (epnum & 1) ? "in" : "out"); 16726a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi 167372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->endpoint.name = dep->name; 167472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1675653df35e6b3c0df875999a9b842327301269f55dFelipe Balbi dev_vdbg(dwc->dev, "initializing %s\n", dep->name); 1676653df35e6b3c0df875999a9b842327301269f55dFelipe Balbi 167772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (epnum == 0 || epnum == 1) { 1678e117e742d310683b410951faeab4b13b6c3c609fRobert Baldyga usb_ep_set_maxpacket_limit(&dep->endpoint, 512); 16796048e4c69d80600baba35856651056860d5d8f5aPratyush Anand dep->endpoint.maxburst = 1; 168072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->endpoint.ops = &dwc3_gadget_ep0_ops; 168172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!epnum) 168272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ep0 = &dep->endpoint; 168372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 168472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 168572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1686e117e742d310683b410951faeab4b13b6c3c609fRobert Baldyga usb_ep_set_maxpacket_limit(&dep->endpoint, 1024); 168712d36c16bde3ee0643d705caa87723de536dbe49Sebastian Andrzej Siewior dep->endpoint.max_streams = 15; 168872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->endpoint.ops = &dwc3_gadget_ep_ops; 168972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_add_tail(&dep->endpoint.ep_list, 169072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi &dwc->gadget.ep_list); 169172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 169272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_alloc_trb_pool(dep); 169325b8ff68bf1d4954d4a9dcb4862c6b6a53cb09e2Felipe Balbi if (ret) 169472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 169572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 169625b8ff68bf1d4954d4a9dcb4862c6b6a53cb09e2Felipe Balbi 169772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi INIT_LIST_HEAD(&dep->request_list); 169872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi INIT_LIST_HEAD(&dep->req_queued); 169972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 170072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 170172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 170272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 170372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 17046a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbistatic int dwc3_gadget_init_endpoints(struct dwc3 *dwc) 17056a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi{ 17066a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi int ret; 17076a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi 17086a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi INIT_LIST_HEAD(&dwc->gadget.ep_list); 17096a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi 17106a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi ret = dwc3_gadget_init_hw_endpoints(dwc, dwc->num_out_eps, 0); 17116a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi if (ret < 0) { 17126a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi dev_vdbg(dwc->dev, "failed to allocate OUT endpoints\n"); 17136a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi return ret; 17146a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi } 17156a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi 17166a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi ret = dwc3_gadget_init_hw_endpoints(dwc, dwc->num_in_eps, 1); 17176a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi if (ret < 0) { 17186a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi dev_vdbg(dwc->dev, "failed to allocate IN endpoints\n"); 17196a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi return ret; 17206a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi } 17216a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi 17226a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi return 0; 17236a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi} 17246a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi 172572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_free_endpoints(struct dwc3 *dwc) 172672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 172772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 172872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 epnum; 172972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 173072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi for (epnum = 0; epnum < DWC3_ENDPOINTS_NUM; epnum++) { 173172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[epnum]; 17326a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi if (!dep) 17336a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi continue; 17345bf8fae33d14cc5c3c53a926f9079f92c8b082b0George Cherian /* 17355bf8fae33d14cc5c3c53a926f9079f92c8b082b0George Cherian * Physical endpoints 0 and 1 are special; they form the 17365bf8fae33d14cc5c3c53a926f9079f92c8b082b0George Cherian * bi-directional USB endpoint 0. 17375bf8fae33d14cc5c3c53a926f9079f92c8b082b0George Cherian * 17385bf8fae33d14cc5c3c53a926f9079f92c8b082b0George Cherian * For those two physical endpoints, we don't allocate a TRB 17395bf8fae33d14cc5c3c53a926f9079f92c8b082b0George Cherian * pool nor do we add them the endpoints list. Due to that, we 17405bf8fae33d14cc5c3c53a926f9079f92c8b082b0George Cherian * shouldn't do these two operations otherwise we would end up 17415bf8fae33d14cc5c3c53a926f9079f92c8b082b0George Cherian * with all sorts of bugs when removing dwc3.ko. 17425bf8fae33d14cc5c3c53a926f9079f92c8b082b0George Cherian */ 17435bf8fae33d14cc5c3c53a926f9079f92c8b082b0George Cherian if (epnum != 0 && epnum != 1) { 17445bf8fae33d14cc5c3c53a926f9079f92c8b082b0George Cherian dwc3_free_trb_pool(dep); 174572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_del(&dep->endpoint.ep_list); 17465bf8fae33d14cc5c3c53a926f9079f92c8b082b0George Cherian } 174772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 174872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi kfree(dep); 174972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 175072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 175172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 175272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 1753e5caff6831d00d96b4618de939312570527ad54aFelipe Balbi 1754e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anandstatic int __dwc3_cleanup_done_trbs(struct dwc3 *dwc, struct dwc3_ep *dep, 1755e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand struct dwc3_request *req, struct dwc3_trb *trb, 175672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct dwc3_event_depevt *event, int status) 175772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 175872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned int count; 175972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned int s_pkt = 0; 1760d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand unsigned int trb_status; 176172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 17622c4cbe6e5a9c71408b496e00a78ea9284e98af16Felipe Balbi trace_dwc3_complete_trb(dep, trb); 17632c4cbe6e5a9c71408b496e00a78ea9284e98af16Felipe Balbi 1764e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if ((trb->ctrl & DWC3_TRB_CTRL_HWO) && status != -ESHUTDOWN) 1765e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand /* 1766e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * We continue despite the error. There is not much we 1767e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * can do. If we don't clean it up we loop forever. If 1768e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * we skip the TRB then it gets overwritten after a 1769e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * while since we use them in a ring buffer. A BUG() 1770e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * would help. Lets hope that if this occurs, someone 1771e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * fixes the root cause instead of looking away :) 1772e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand */ 1773e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand dev_err(dwc->dev, "%s's TRB (%p) still owned by HW\n", 1774e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand dep->name, trb); 1775e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand count = trb->size & DWC3_TRB_SIZE_MASK; 1776e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand 1777e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if (dep->direction) { 1778e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if (count) { 1779e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand trb_status = DWC3_TRB_SIZE_TRBSTS(trb->size); 1780e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if (trb_status == DWC3_TRBSTS_MISSED_ISOC) { 1781e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand dev_dbg(dwc->dev, "incomplete IN transfer %s\n", 1782e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand dep->name); 1783e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand /* 1784e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * If missed isoc occurred and there is 1785e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * no request queued then issue END 1786e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * TRANSFER, so that core generates 1787e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * next xfernotready and we will issue 1788e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * a fresh START TRANSFER. 1789e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * If there are still queued request 1790e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * then wait, do not issue either END 1791e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * or UPDATE TRANSFER, just attach next 1792e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * request in request_list during 1793e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * giveback.If any future queued request 1794e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * is successfully transferred then we 1795e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * will issue UPDATE TRANSFER for all 1796e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * request in the request_list. 1797e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand */ 1798e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand dep->flags |= DWC3_EP_MISSED_ISOC; 1799e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand } else { 1800e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand dev_err(dwc->dev, "incomplete IN transfer %s\n", 1801e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand dep->name); 1802e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand status = -ECONNRESET; 1803e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand } 1804e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand } else { 1805e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand dep->flags &= ~DWC3_EP_MISSED_ISOC; 1806e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand } 1807e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand } else { 1808e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if (count && (event->status & DEPEVT_STATUS_SHORT)) 1809e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand s_pkt = 1; 1810e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand } 1811e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand 1812e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand /* 1813e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * We assume here we will always receive the entire data block 1814e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * which we should receive. Meaning, if we program RX to 1815e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * receive 4K but we receive only 2K, we assume that's all we 1816e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * should receive and we simply bounce the request back to the 1817e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * gadget driver for further processing. 1818e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand */ 1819e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand req->request.actual += req->request.length - count; 1820e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if (s_pkt) 1821e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand return 1; 1822e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if ((event->status & DEPEVT_STATUS_LST) && 1823e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand (trb->ctrl & (DWC3_TRB_CTRL_LST | 1824e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand DWC3_TRB_CTRL_HWO))) 1825e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand return 1; 1826e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if ((event->status & DEPEVT_STATUS_IOC) && 1827e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand (trb->ctrl & DWC3_TRB_CTRL_IOC)) 1828e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand return 1; 1829e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand return 0; 1830e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand} 1831e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand 1832e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anandstatic int dwc3_cleanup_done_reqs(struct dwc3 *dwc, struct dwc3_ep *dep, 1833e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand const struct dwc3_event_depevt *event, int status) 1834e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand{ 1835e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand struct dwc3_request *req; 1836e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand struct dwc3_trb *trb; 1837e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand unsigned int slot; 1838e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand unsigned int i; 1839e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand int ret; 1840e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand 184172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi do { 184272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req = next_request(&dep->req_queued); 1843d39ee7be2aaf0a53d7b5f43c13571bac95f7cc0cSebastian Andrzej Siewior if (!req) { 1844d39ee7be2aaf0a53d7b5f43c13571bac95f7cc0cSebastian Andrzej Siewior WARN_ON_ONCE(1); 1845d39ee7be2aaf0a53d7b5f43c13571bac95f7cc0cSebastian Andrzej Siewior return 1; 1846d39ee7be2aaf0a53d7b5f43c13571bac95f7cc0cSebastian Andrzej Siewior } 1847e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand i = 0; 1848e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand do { 1849e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand slot = req->start_slot + i; 1850e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if ((slot == DWC3_TRB_NUM - 1) && 1851e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand usb_endpoint_xfer_isoc(dep->endpoint.desc)) 1852e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand slot++; 1853e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand slot %= DWC3_TRB_NUM; 1854e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand trb = &dep->trb_pool[slot]; 185572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1856e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand ret = __dwc3_cleanup_done_trbs(dwc, dep, req, trb, 1857e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand event, status); 1858e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if (ret) 1859e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand break; 1860e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand }while (++i < req->request.num_mapped_sgs); 186172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 186272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_giveback(dep, req, status); 1863e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand 1864e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if (ret) 186572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 186672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } while (1); 186772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1868cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand if (usb_endpoint_xfer_isoc(dep->endpoint.desc) && 1869cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand list_empty(&dep->req_queued)) { 1870cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand if (list_empty(&dep->request_list)) { 1871cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand /* 1872cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand * If there is no entry in request list then do 1873cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand * not issue END TRANSFER now. Just set PENDING 1874cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand * flag, so that END TRANSFER is issued when an 1875cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand * entry is added into request list. 1876cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand */ 1877cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand dep->flags = DWC3_EP_PENDING_REQUEST; 1878cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand } else { 1879b992e6813e257269e9599ca07be8bd52df784bf5Paul Zimmerman dwc3_stop_active_transfer(dwc, dep->number, true); 1880cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand dep->flags = DWC3_EP_ENABLED; 1881cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand } 18827efea86c2868b8fd9df65e589e33aebe498ce21dPratyush Anand return 1; 18837efea86c2868b8fd9df65e589e33aebe498ce21dPratyush Anand } 18847efea86c2868b8fd9df65e589e33aebe498ce21dPratyush Anand 188572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 1; 188672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 188772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 188872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_endpoint_transfer_complete(struct dwc3 *dwc, 1889029d97ff543219762685805e15d71f7005ad7c5eJingoo Han struct dwc3_ep *dep, const struct dwc3_event_depevt *event) 189072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 189172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned status = 0; 189272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int clean_busy; 189372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 189472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (event->status & DEPEVT_STATUS_BUSERR) 189572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi status = -ECONNRESET; 189672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 18971d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman clean_busy = dwc3_cleanup_done_reqs(dwc, dep, event, status); 1898c2df85ca31645ed3c68c56bd30a3673e034224f1Paul Zimmerman if (clean_busy) 189972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags &= ~DWC3_EP_BUSY; 1900fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1901fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi /* 1902fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * WORKAROUND: This is the 2nd half of U1/U2 -> U0 workaround. 1903fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * See dwc3_gadget_linksts_change_interrupt() for 1st half. 1904fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi */ 1905fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi if (dwc->revision < DWC3_REVISION_183A) { 1906fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi u32 reg; 1907fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi int i; 1908fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1909fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi for (i = 0; i < DWC3_ENDPOINTS_NUM; i++) { 1910348e026fafe2501281db5fb7fed599b337cad358Moiz Sonasath dep = dwc->eps[i]; 1911fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1912fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) 1913fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi continue; 1914fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1915fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi if (!list_empty(&dep->req_queued)) 1916fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi return; 1917fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi } 1918fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1919fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 1920fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi reg |= dwc->u1u2; 1921fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 1922fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1923fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi dwc->u1u2 = 0; 1924fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi } 192572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 192672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 192772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_endpoint_interrupt(struct dwc3 *dwc, 192872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct dwc3_event_depevt *event) 192972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 193072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 193172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 epnum = event->endpoint_number; 193272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 193372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[epnum]; 193472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 19353336abb5b608300550136ddab7a7101b30d45fa7Felipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) 19363336abb5b608300550136ddab7a7101b30d45fa7Felipe Balbi return; 19373336abb5b608300550136ddab7a7101b30d45fa7Felipe Balbi 193872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (epnum == 0 || epnum == 1) { 193972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_ep0_interrupt(dwc, event); 194072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 194172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 194272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 194372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (event->endpoint_event) { 194472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPEVT_XFERCOMPLETE: 1945b4996a8631e80a2aaddb5c487ff6b9ad37315f70Felipe Balbi dep->resource_index = 0; 1946c2df85ca31645ed3c68c56bd30a3673e034224f1Paul Zimmerman 194716e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if (usb_endpoint_xfer_isoc(dep->endpoint.desc)) { 194872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "%s is an Isochronous endpoint\n", 194972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 195072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 195172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 195272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1953029d97ff543219762685805e15d71f7005ad7c5eJingoo Han dwc3_endpoint_transfer_complete(dwc, dep, event); 195472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 195572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPEVT_XFERINPROGRESS: 1956029d97ff543219762685805e15d71f7005ad7c5eJingoo Han dwc3_endpoint_transfer_complete(dwc, dep, event); 195772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 195872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPEVT_XFERNOTREADY: 195916e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if (usb_endpoint_xfer_isoc(dep->endpoint.desc)) { 196072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_start_isoc(dwc, dep, event); 196172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 196272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 196372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 196472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s: reason %s\n", 196540aa41fba348bc5bd19ff5bcf2b03d67bb01d1ceFelipe Balbi dep->name, event->status & 196640aa41fba348bc5bd19ff5bcf2b03d67bb01d1ceFelipe Balbi DEPEVT_STATUS_TRANSFER_ACTIVE 196772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ? "Transfer Active" 196872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi : "Transfer Not Active"); 196972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 197072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = __dwc3_gadget_kick_transfer(dep, 0, 1); 197172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!ret || ret == -EBUSY) 197272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 197372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 197472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "%s: failed to kick transfers\n", 197572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 197672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 197772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 197872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 1979879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi case DWC3_DEPEVT_STREAMEVT: 198016e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if (!usb_endpoint_xfer_bulk(dep->endpoint.desc)) { 1981879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dev_err(dwc->dev, "Stream event for non-Bulk %s\n", 1982879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dep->name); 1983879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi return; 1984879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi } 1985879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi 1986879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi switch (event->status) { 1987879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi case DEPEVT_STREAMEVT_FOUND: 1988879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dev_vdbg(dwc->dev, "Stream %d found and started\n", 1989879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi event->parameters); 1990879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi 1991879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi break; 1992879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi case DEPEVT_STREAMEVT_NOTFOUND: 1993879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi /* FALLTHROUGH */ 1994879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi default: 1995879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dev_dbg(dwc->dev, "Couldn't find suitable stream\n"); 1996879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi } 1997879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi break; 199872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPEVT_RXTXFIFOEVT: 199972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "%s FIFO Overrun\n", dep->name); 200072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 200172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPEVT_EPCMDCMPLT: 2002ea53b8828c50b7a5138a8931c41b2671682c86b5Felipe Balbi dev_vdbg(dwc->dev, "Endpoint Command Complete\n"); 200372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 200472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 200572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 200672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 200772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_disconnect_gadget(struct dwc3 *dwc) 200872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 200972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dwc->gadget_driver && dwc->gadget_driver->disconnect) { 201072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock(&dwc->lock); 201172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver->disconnect(&dwc->gadget); 201272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock(&dwc->lock); 201372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 201472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 201572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 2016bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbistatic void dwc3_suspend_gadget(struct dwc3 *dwc) 2017bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi{ 201873a30bfc0d526db899033165db6f95c427e70505Dan Carpenter if (dwc->gadget_driver && dwc->gadget_driver->suspend) { 2019bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi spin_unlock(&dwc->lock); 2020bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi dwc->gadget_driver->suspend(&dwc->gadget); 2021bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi spin_lock(&dwc->lock); 2022bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi } 2023bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi} 2024bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi 2025bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbistatic void dwc3_resume_gadget(struct dwc3 *dwc) 2026bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi{ 202773a30bfc0d526db899033165db6f95c427e70505Dan Carpenter if (dwc->gadget_driver && dwc->gadget_driver->resume) { 2028bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi spin_unlock(&dwc->lock); 2029bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi dwc->gadget_driver->resume(&dwc->gadget); 2030bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi spin_lock(&dwc->lock); 2031bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi } 2032bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi} 2033bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi 2034b992e6813e257269e9599ca07be8bd52df784bf5Paul Zimmermanstatic void dwc3_stop_active_transfer(struct dwc3 *dwc, u32 epnum, bool force) 203572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 203672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 203772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 203872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 cmd; 203972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 204072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 204172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[epnum]; 204272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 2043b4996a8631e80a2aaddb5c487ff6b9ad37315f70Felipe Balbi if (!dep->resource_index) 20443daf74d78dfcd552445c35f1b82a271ca305ceb9Pratyush Anand return; 20453daf74d78dfcd552445c35f1b82a271ca305ceb9Pratyush Anand 204657911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand /* 204757911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * NOTICE: We are violating what the Databook says about the 204857911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * EndTransfer command. Ideally we would _always_ wait for the 204957911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * EndTransfer Command Completion IRQ, but that's causing too 205057911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * much trouble synchronizing between us and gadget driver. 205157911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * 205257911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * We have discussed this with the IP Provider and it was 205357911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * suggested to giveback all requests here, but give HW some 205457911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * extra time to synchronize with the interconnect. We're using 205557911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * an arbitraty 100us delay for that. 205657911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * 205757911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * Note also that a similar handling was tested by Synopsys 205857911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * (thanks a lot Paul) and nothing bad has come out of it. 205957911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * In short, what we're doing is: 206057911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * 206157911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * - Issue EndTransfer WITH CMDIOC bit set 206257911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * - Wait 100us 206357911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand */ 206457911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand 20653daf74d78dfcd552445c35f1b82a271ca305ceb9Pratyush Anand cmd = DWC3_DEPCMD_ENDTRANSFER; 2066b992e6813e257269e9599ca07be8bd52df784bf5Paul Zimmerman cmd |= force ? DWC3_DEPCMD_HIPRI_FORCERM : 0; 2067b992e6813e257269e9599ca07be8bd52df784bf5Paul Zimmerman cmd |= DWC3_DEPCMD_CMDIOC; 2068b4996a8631e80a2aaddb5c487ff6b9ad37315f70Felipe Balbi cmd |= DWC3_DEPCMD_PARAM(dep->resource_index); 20693daf74d78dfcd552445c35f1b82a271ca305ceb9Pratyush Anand memset(¶ms, 0, sizeof(params)); 20703daf74d78dfcd552445c35f1b82a271ca305ceb9Pratyush Anand ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, cmd, ¶ms); 20713daf74d78dfcd552445c35f1b82a271ca305ceb9Pratyush Anand WARN_ON_ONCE(ret); 2072b4996a8631e80a2aaddb5c487ff6b9ad37315f70Felipe Balbi dep->resource_index = 0; 2073041d81f493d90c940ec41f0ec98bc7c4f2fba431Felipe Balbi dep->flags &= ~DWC3_EP_BUSY; 207457911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand udelay(100); 207572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 207672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 207772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_stop_active_transfers(struct dwc3 *dwc) 207872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 207972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 epnum; 208072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 208172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi for (epnum = 2; epnum < DWC3_ENDPOINTS_NUM; epnum++) { 208272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 208372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 208472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[epnum]; 20856a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi if (!dep) 20866a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi continue; 20876a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi 208872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) 208972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi continue; 209072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 2091624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior dwc3_remove_requests(dwc, dep); 209272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 209372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 209472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 209572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_clear_stall_all_ep(struct dwc3 *dwc) 209672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 209772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 epnum; 209872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 209972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi for (epnum = 1; epnum < DWC3_ENDPOINTS_NUM; epnum++) { 210072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 210172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 210272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 210372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 210472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[epnum]; 21056a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi if (!dep) 21066a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi continue; 210772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 210872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(dep->flags & DWC3_EP_STALL)) 210972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi continue; 211072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 211172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags &= ~DWC3_EP_STALL; 211272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 211372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0, sizeof(params)); 211472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, 211572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEPCMD_CLEARSTALL, ¶ms); 211672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi WARN_ON_ONCE(ret); 211772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 211872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 211972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 212072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_disconnect_interrupt(struct dwc3 *dwc) 212172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 2122c4430a26948b84c0d820e83f8c640229f960d3b6Felipe Balbi int reg; 2123c4430a26948b84c0d820e83f8c640229f960d3b6Felipe Balbi 212472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 212572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DCTL_INITU1ENA; 212672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 212772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 212872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DCTL_INITU2ENA; 212972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 213072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 213172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_disconnect_gadget(dwc); 2132b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman dwc->start_config_issued = false; 213372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 213472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_UNKNOWN; 2135df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi dwc->setup_packet_pending = false; 213672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 213772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 213872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_reset_interrupt(struct dwc3 *dwc) 213972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 214072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 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 reg = dwc3_readl(dwc->regs, DWC3_DSTS); 222772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi speed = reg & DWC3_DSTS_CONNECTSPD; 222872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->speed = speed; 222972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 223072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_update_ram_clk_sel(dwc, speed); 223172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 223272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (speed) { 223372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DCFG_SUPERSPEED: 223405870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi /* 223505870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * WORKAROUND: DWC3 revisions <1.90a have an issue which 223605870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * would cause a missing USB3 Reset event. 223705870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * 223805870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * In such situations, we should force a USB3 Reset 223905870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * event by calling our dwc3_gadget_reset_interrupt() 224005870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * routine. 224105870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * 224205870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * Refers to: 224305870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * 224405870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * STAR#9000483510: RTL: SS : USB3 reset event may 224505870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * not be generated always when the link enters poll 224605870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi */ 224705870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi if (dwc->revision < DWC3_REVISION_190A) 224805870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi dwc3_gadget_reset_interrupt(dwc); 224905870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi 225072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(512); 225172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ep0->maxpacket = 512; 225272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_SUPER; 225372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 225472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DCFG_HIGHSPEED: 225572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(64); 225672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ep0->maxpacket = 64; 225772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_HIGH; 225872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 225972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DCFG_FULLSPEED2: 226072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DCFG_FULLSPEED1: 226172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(64); 226272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ep0->maxpacket = 64; 226372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_FULL; 226472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 226572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DCFG_LOWSPEED: 226672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(8); 226772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ep0->maxpacket = 8; 226872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_LOW; 226972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 227072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 227172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 22722b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand /* Enable USB2 LPM Capability */ 22732b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand 22742b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand if ((dwc->revision > DWC3_REVISION_194A) 22752b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand && (speed != DWC3_DCFG_SUPERSPEED)) { 22762b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand reg = dwc3_readl(dwc->regs, DWC3_DCFG); 22772b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand reg |= DWC3_DCFG_LPM_CAP; 22782b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand dwc3_writel(dwc->regs, DWC3_DCFG, reg); 22792b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand 22802b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand reg = dwc3_readl(dwc->regs, DWC3_DCTL); 22812b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand reg &= ~(DWC3_DCTL_HIRD_THRES_MASK | DWC3_DCTL_L1_HIBER_EN); 22822b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand 22831a947746dbe1486d0e305ab512ddf085b7874cb3Felipe Balbi /* 22841a947746dbe1486d0e305ab512ddf085b7874cb3Felipe Balbi * TODO: This should be configurable. For now using 22851a947746dbe1486d0e305ab512ddf085b7874cb3Felipe Balbi * maximum allowed HIRD threshold value of 0b1100 22861a947746dbe1486d0e305ab512ddf085b7874cb3Felipe Balbi */ 22871a947746dbe1486d0e305ab512ddf085b7874cb3Felipe Balbi reg |= DWC3_DCTL_HIRD_THRES(12); 22882b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand 22892b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand dwc3_writel(dwc->regs, DWC3_DCTL, reg); 2290356363bf6b2fc4785d874ef87ed2fad4b8543490Felipe Balbi } else { 2291356363bf6b2fc4785d874ef87ed2fad4b8543490Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 2292356363bf6b2fc4785d874ef87ed2fad4b8543490Felipe Balbi reg &= ~DWC3_DCTL_HIRD_THRES_MASK; 2293356363bf6b2fc4785d874ef87ed2fad4b8543490Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 22942b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand } 22952b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand 229672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[0]; 2297265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL, true, 2298265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman false); 229972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 230072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to enable %s\n", dep->name); 230172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 230272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 230372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 230472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[1]; 2305265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL, true, 2306265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman false); 230772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 230872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to enable %s\n", dep->name); 230972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 231072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 231172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 231272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 231372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Configure PHY via GUSB3PIPECTLn if required. 231472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 231572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Update GTXFIFOSIZn 231672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 231772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * In both cases reset values should be sufficient. 231872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 231972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 232072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 232172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_wakeup_interrupt(struct dwc3 *dwc) 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 2410bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi switch (next) { 2411bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi case DWC3_LINK_STATE_U1: 2412bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi if (dwc->speed == USB_SPEED_SUPER) 2413bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi dwc3_suspend_gadget(dwc); 2414bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi break; 2415bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi case DWC3_LINK_STATE_U2: 2416bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi case DWC3_LINK_STATE_U3: 2417bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi dwc3_suspend_gadget(dwc); 2418bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi break; 2419bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi case DWC3_LINK_STATE_RESUME: 2420bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi dwc3_resume_gadget(dwc); 2421bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi break; 2422bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi default: 2423bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi /* do nothing */ 2424bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi break; 2425bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi } 2426bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi 2427e57ebc1db6ef796124b69abca044a373b9110a47Felipe Balbi dwc->link_state = next; 242872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 242972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 2430e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbistatic void dwc3_gadget_hibernation_interrupt(struct dwc3 *dwc, 2431e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi unsigned int evtinfo) 2432e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi{ 2433e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi unsigned int is_ss = evtinfo & BIT(4); 2434e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi 2435e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi /** 2436e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi * WORKAROUND: DWC3 revison 2.20a with hibernation support 2437e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi * have a known issue which can cause USB CV TD.9.23 to fail 2438e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi * randomly. 2439e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi * 2440e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi * Because of this issue, core could generate bogus hibernation 2441e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi * events which SW needs to ignore. 2442e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi * 2443e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi * Refers to: 2444e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi * 2445e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi * STAR#9000546576: Device Mode Hibernation: Issue in USB 2.0 2446e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi * Device Fallback from SuperSpeed 2447e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi */ 2448e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi if (is_ss ^ (dwc->speed == USB_SPEED_SUPER)) 2449e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi return; 2450e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi 2451e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi /* enter hibernation here */ 2452e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi} 2453e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi 245472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_interrupt(struct dwc3 *dwc, 245572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct dwc3_event_devt *event) 245672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 245772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (event->type) { 245872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_DISCONNECT: 245972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_disconnect_interrupt(dwc); 246072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 246172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_RESET: 246272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_reset_interrupt(dwc); 246372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 246472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_CONNECT_DONE: 246572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_conndone_interrupt(dwc); 246672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 246772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_WAKEUP: 246872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_wakeup_interrupt(dwc); 246972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 2470e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi case DWC3_DEVICE_EVENT_HIBER_REQ: 2471e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi if (dev_WARN_ONCE(dwc->dev, !dwc->has_hibernation, 2472e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi "unexpected hibernation event\n")) 2473e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi break; 2474e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi 2475e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi dwc3_gadget_hibernation_interrupt(dwc, event->event_info); 2476e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi break; 247772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_LINK_STATUS_CHANGE: 247872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_linksts_change_interrupt(dwc, event->event_info); 247972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 248072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_EOPF: 248172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "End of Periodic Frame\n"); 248272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 248372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_SOF: 248472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "Start of Periodic Frame\n"); 248572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 248672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_ERRATIC_ERROR: 248772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "Erratic Error\n"); 248872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 248972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_CMD_CMPL: 249072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "Command Complete\n"); 249172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 249272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_OVERFLOW: 249372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "Overflow\n"); 249472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 249572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 249672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "UNKNOWN IRQ %d\n", event->type); 249772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 249872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 249972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 250072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_process_event_entry(struct dwc3 *dwc, 250172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const union dwc3_event *event) 250272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 25032c4cbe6e5a9c71408b496e00a78ea9284e98af16Felipe Balbi trace_dwc3_event(event->raw); 25042c4cbe6e5a9c71408b496e00a78ea9284e98af16Felipe Balbi 250572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* Endpoint IRQ, handle it and return early */ 250672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (event->type.is_devspec == 0) { 250772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* depevt */ 250872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return dwc3_endpoint_interrupt(dwc, &event->depevt); 250972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 251072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 251172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (event->type.type) { 251272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_EVENT_TYPE_DEV: 251372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_interrupt(dwc, &event->devt); 251472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 251572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* REVISIT what to do with Carkit and I2C events ? */ 251672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 251772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "UNKNOWN IRQ type %d\n", event->raw); 251872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 251972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 252072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 2521f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbistatic irqreturn_t dwc3_process_event_buf(struct dwc3 *dwc, u32 buf) 2522b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi{ 2523f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi struct dwc3_event_buffer *evt; 2524b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi irqreturn_t ret = IRQ_NONE; 2525f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi int left; 2526e8adfc30ff9282a728fd8b666b6418308164c415Felipe Balbi u32 reg; 2527b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi 2528f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi evt = dwc->ev_buffs[buf]; 2529f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi left = evt->count; 2530b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi 2531f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi if (!(evt->flags & DWC3_EVENT_PENDING)) 2532f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi return IRQ_NONE; 2533b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi 2534f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi while (left > 0) { 2535f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi union dwc3_event event; 2536b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi 2537f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi event.raw = *(u32 *) (evt->buf + evt->lpos); 2538b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi 2539f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi dwc3_process_event_entry(dwc, &event); 2540b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi 2541f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi /* 2542f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi * FIXME we wrap around correctly to the next entry as 2543f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi * almost all entries are 4 bytes in size. There is one 2544f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi * entry which has 12 bytes which is a regular entry 2545f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi * followed by 8 bytes data. ATM I don't know how 2546f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi * things are organized if we get next to the a 2547f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi * boundary so I worry about that once we try to handle 2548f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi * that. 2549f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi */ 2550f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi evt->lpos = (evt->lpos + 4) % DWC3_EVENT_BUFFERS_SIZE; 2551f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi left -= 4; 2552b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi 2553f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi dwc3_writel(dwc->regs, DWC3_GEVNTCOUNT(buf), 4); 2554f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi } 2555b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi 2556f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi evt->count = 0; 2557f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi evt->flags &= ~DWC3_EVENT_PENDING; 2558f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi ret = IRQ_HANDLED; 2559b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi 2560f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi /* Unmask interrupt */ 2561f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi reg = dwc3_readl(dwc->regs, DWC3_GEVNTSIZ(buf)); 2562f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi reg &= ~DWC3_GEVNTSIZ_INTMASK; 2563f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi dwc3_writel(dwc->regs, DWC3_GEVNTSIZ(buf), reg); 2564b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi 2565f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi return ret; 2566f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi} 2567e8adfc30ff9282a728fd8b666b6418308164c415Felipe Balbi 2568f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbistatic irqreturn_t dwc3_thread_interrupt(int irq, void *_dwc) 2569f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi{ 2570f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi struct dwc3 *dwc = _dwc; 2571f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi unsigned long flags; 2572f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi irqreturn_t ret = IRQ_NONE; 2573f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi int i; 2574f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi 2575f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi spin_lock_irqsave(&dwc->lock, flags); 2576f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi 2577f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi for (i = 0; i < dwc->num_event_buffers; i++) 2578f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi ret |= dwc3_process_event_buf(dwc, i); 2579b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi 2580b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 2581b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi 2582b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi return ret; 2583b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi} 2584b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi 25857f97aa9865800766e570d0e1be772a034dd30388Felipe Balbistatic irqreturn_t dwc3_check_event_buf(struct dwc3 *dwc, u32 buf) 258672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 258772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_event_buffer *evt; 258872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 count; 2589e8adfc30ff9282a728fd8b666b6418308164c415Felipe Balbi u32 reg; 259072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 2591b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi evt = dwc->ev_buffs[buf]; 2592b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi 259372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi count = dwc3_readl(dwc->regs, DWC3_GEVNTCOUNT(buf)); 259472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi count &= DWC3_GEVNTCOUNT_MASK; 259572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!count) 259672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return IRQ_NONE; 259772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 2598b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi evt->count = count; 2599b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi evt->flags |= DWC3_EVENT_PENDING; 260072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 2601e8adfc30ff9282a728fd8b666b6418308164c415Felipe Balbi /* Mask interrupt */ 2602e8adfc30ff9282a728fd8b666b6418308164c415Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_GEVNTSIZ(buf)); 2603e8adfc30ff9282a728fd8b666b6418308164c415Felipe Balbi reg |= DWC3_GEVNTSIZ_INTMASK; 2604e8adfc30ff9282a728fd8b666b6418308164c415Felipe Balbi dwc3_writel(dwc->regs, DWC3_GEVNTSIZ(buf), reg); 2605e8adfc30ff9282a728fd8b666b6418308164c415Felipe Balbi 2606b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi return IRQ_WAKE_THREAD; 260772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 260872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 260972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic irqreturn_t dwc3_interrupt(int irq, void *_dwc) 261072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 261172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = _dwc; 261272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int i; 261372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi irqreturn_t ret = IRQ_NONE; 261472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 261572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock(&dwc->lock); 261672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 26179f622b2a407d8b34a5a7f5b4abd8b29b25cf4f32Felipe Balbi for (i = 0; i < dwc->num_event_buffers; i++) { 261872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi irqreturn_t status; 261972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 26207f97aa9865800766e570d0e1be772a034dd30388Felipe Balbi status = dwc3_check_event_buf(dwc, i); 2621b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi if (status == IRQ_WAKE_THREAD) 262272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = status; 262372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 262472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 262572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock(&dwc->lock); 262672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 262772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 262872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 262972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 263072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/** 263172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * dwc3_gadget_init - Initializes gadget related registers 26321d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * @dwc: pointer to our controller context structure 263372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 263472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Returns 0 on success otherwise negative errno. 263572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 263641ac7b3ab7fe1d6175839947a877fdf95cbd2211Bill Pembertonint dwc3_gadget_init(struct dwc3 *dwc) 263772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 263872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 263972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 264072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ctrl_req = dma_alloc_coherent(dwc->dev, sizeof(*dwc->ctrl_req), 264172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi &dwc->ctrl_req_addr, GFP_KERNEL); 264272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dwc->ctrl_req) { 264372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to allocate ctrl request\n"); 264472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -ENOMEM; 264572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto err0; 264672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 264772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 264872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ep0_trb = dma_alloc_coherent(dwc->dev, sizeof(*dwc->ep0_trb), 264972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi &dwc->ep0_trb_addr, GFP_KERNEL); 265072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dwc->ep0_trb) { 265172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to allocate ep0 trb\n"); 265272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -ENOMEM; 265372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto err1; 265472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 265572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 26563ef35fafdc87b72851f7785dc5331a0f4eb1b3ceFelipe Balbi dwc->setup_buf = kzalloc(DWC3_EP0_BOUNCE_SIZE, GFP_KERNEL); 265772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dwc->setup_buf) { 265872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -ENOMEM; 265972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto err2; 266072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 266172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 26625812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi dwc->ep0_bounce = dma_alloc_coherent(dwc->dev, 26633ef35fafdc87b72851f7785dc5331a0f4eb1b3ceFelipe Balbi DWC3_EP0_BOUNCE_SIZE, &dwc->ep0_bounce_addr, 26643ef35fafdc87b72851f7785dc5331a0f4eb1b3ceFelipe Balbi GFP_KERNEL); 26655812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi if (!dwc->ep0_bounce) { 26665812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi dev_err(dwc->dev, "failed to allocate ep0 bounce buffer\n"); 26675812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi ret = -ENOMEM; 26685812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi goto err3; 26695812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi } 26705812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi 267172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ops = &dwc3_gadget_ops; 2672d327ab5b6d660d6fe22b073b743fde1668e593bbMichal Nazarewicz dwc->gadget.max_speed = USB_SPEED_SUPER; 267372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_UNKNOWN; 2674eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dwc->gadget.sg_supported = true; 267572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.name = "dwc3-gadget"; 267672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 267772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 2678a4b9d94b3dc8e65951c1819d37f213b3c6815adcDavid Cohen * Per databook, DWC3 needs buffer size to be aligned to MaxPacketSize 2679a4b9d94b3dc8e65951c1819d37f213b3c6815adcDavid Cohen * on ep out. 2680a4b9d94b3dc8e65951c1819d37f213b3c6815adcDavid Cohen */ 2681a4b9d94b3dc8e65951c1819d37f213b3c6815adcDavid Cohen dwc->gadget.quirk_ep_out_aligned_size = true; 2682a4b9d94b3dc8e65951c1819d37f213b3c6815adcDavid Cohen 2683a4b9d94b3dc8e65951c1819d37f213b3c6815adcDavid Cohen /* 268472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * REVISIT: Here we should clear all pending IRQs to be 268572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * sure we're starting from a well known location. 268672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 268772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 268872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_gadget_init_endpoints(dwc); 268972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 26905812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi goto err4; 269172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 269272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = usb_add_gadget_udc(dwc->dev, &dwc->gadget); 269372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 269472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to register udc\n"); 2695e1f804676a95b9d5caaa3a822d90bc1101595468David Cohen goto err4; 269672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 269772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 269872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 269972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 27005812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbierr4: 2701e1f804676a95b9d5caaa3a822d90bc1101595468David Cohen dwc3_gadget_free_endpoints(dwc); 27023ef35fafdc87b72851f7785dc5331a0f4eb1b3ceFelipe Balbi dma_free_coherent(dwc->dev, DWC3_EP0_BOUNCE_SIZE, 27033ef35fafdc87b72851f7785dc5331a0f4eb1b3ceFelipe Balbi dwc->ep0_bounce, dwc->ep0_bounce_addr); 27045812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi 270572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbierr3: 27060fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi kfree(dwc->setup_buf); 270772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 270872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbierr2: 270972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(*dwc->ep0_trb), 271072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ep0_trb, dwc->ep0_trb_addr); 271172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 271272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbierr1: 271372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(*dwc->ctrl_req), 271472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ctrl_req, dwc->ctrl_req_addr); 271572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 271672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbierr0: 271772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 271872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 271972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 27207415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi/* -------------------------------------------------------------------------- */ 27217415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 272272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbivoid dwc3_gadget_exit(struct dwc3 *dwc) 272372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 272472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi usb_del_gadget_udc(&dwc->gadget); 272572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 272672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_free_endpoints(dwc); 272772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 27283ef35fafdc87b72851f7785dc5331a0f4eb1b3ceFelipe Balbi dma_free_coherent(dwc->dev, DWC3_EP0_BOUNCE_SIZE, 27293ef35fafdc87b72851f7785dc5331a0f4eb1b3ceFelipe Balbi dwc->ep0_bounce, dwc->ep0_bounce_addr); 27305812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi 27310fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi kfree(dwc->setup_buf); 273272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 273372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(*dwc->ep0_trb), 273472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ep0_trb, dwc->ep0_trb_addr); 273572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 273672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(*dwc->ctrl_req), 273772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ctrl_req, dwc->ctrl_req_addr); 273872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 27397415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 27407415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbiint dwc3_gadget_prepare(struct dwc3 *dwc) 27417415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi{ 27427b2a0368bbc9bc4a7936d8587eaff4b8c35b2247Felipe Balbi if (dwc->pullups_connected) { 27437415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi dwc3_gadget_disable_irq(dwc); 27447b2a0368bbc9bc4a7936d8587eaff4b8c35b2247Felipe Balbi dwc3_gadget_run_stop(dwc, true, true); 27457b2a0368bbc9bc4a7936d8587eaff4b8c35b2247Felipe Balbi } 27467415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 27477415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi return 0; 27487415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi} 27497415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 27507415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbivoid dwc3_gadget_complete(struct dwc3 *dwc) 27517415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi{ 27527415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi if (dwc->pullups_connected) { 27537415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi dwc3_gadget_enable_irq(dwc); 27547b2a0368bbc9bc4a7936d8587eaff4b8c35b2247Felipe Balbi dwc3_gadget_run_stop(dwc, true, false); 27557415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi } 27567415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi} 27577415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 27587415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbiint dwc3_gadget_suspend(struct dwc3 *dwc) 27597415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi{ 27607415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi __dwc3_gadget_ep_disable(dwc->eps[0]); 27617415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi __dwc3_gadget_ep_disable(dwc->eps[1]); 27627415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 27637415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi dwc->dcfg = dwc3_readl(dwc->regs, DWC3_DCFG); 27647415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 27657415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi return 0; 27667415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi} 27677415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 27687415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbiint dwc3_gadget_resume(struct dwc3 *dwc) 27697415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi{ 27707415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi struct dwc3_ep *dep; 27717415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi int ret; 27727415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 27737415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi /* Start with SuperSpeed Default */ 27747415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(512); 27757415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 27767415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi dep = dwc->eps[0]; 2777265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL, false, 2778265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman false); 27797415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi if (ret) 27807415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi goto err0; 27817415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 27827415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi dep = dwc->eps[1]; 2783265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL, false, 2784265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman false); 27857415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi if (ret) 27867415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi goto err1; 27877415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 27887415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi /* begin to receive SETUP packets */ 27897415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi dwc->ep0state = EP0_SETUP_PHASE; 27907415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi dwc3_ep0_out_start(dwc); 27917415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 27927415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCFG, dwc->dcfg); 27937415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 27947415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi return 0; 27957415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 27967415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbierr1: 27977415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi __dwc3_gadget_ep_disable(dwc->eps[0]); 27987415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 27997415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbierr0: 28007415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi return ret; 28017415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi} 2802