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 5281d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman /* Link TRB for ISOC. The HWO bit is never reset */ 52972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trb_st_hw = &dep->trb_pool[0]; 53072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 531f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb_link = &dep->trb_pool[DWC3_TRB_NUM - 1]; 5321200a82a59b6aa65758ccc92c3447b98c53cd7a2Jack Pham memset(trb_link, 0, sizeof(*trb_link)); 53372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 534f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb_link->bpl = lower_32_bits(dwc3_trb_dma_offset(dep, trb_st_hw)); 535f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb_link->bph = upper_32_bits(dwc3_trb_dma_offset(dep, trb_st_hw)); 536f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb_link->ctrl |= DWC3_TRBCTL_LINK_TRB; 537f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb_link->ctrl |= DWC3_TRB_CTRL_HWO; 53872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 53972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 54072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 54172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 54272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 543b992e6813e257269e9599ca07be8bd52df784bf5Paul Zimmermanstatic void dwc3_stop_active_transfer(struct dwc3 *dwc, u32 epnum, bool force); 544624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewiorstatic void dwc3_remove_requests(struct dwc3 *dwc, struct dwc3_ep *dep) 54572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 54672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req; 54772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 548ea53b8828c50b7a5138a8931c41b2671682c86b5Felipe Balbi if (!list_empty(&dep->req_queued)) { 549b992e6813e257269e9599ca07be8bd52df784bf5Paul Zimmerman dwc3_stop_active_transfer(dwc, dep->number, true); 550624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior 55157911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand /* - giveback all requests to gadget driver */ 5521591633ed6c4c3994944f31ddb59bc072a2ed0caPratyush Anand while (!list_empty(&dep->req_queued)) { 5531591633ed6c4c3994944f31ddb59bc072a2ed0caPratyush Anand req = next_request(&dep->req_queued); 5541591633ed6c4c3994944f31ddb59bc072a2ed0caPratyush Anand 5551591633ed6c4c3994944f31ddb59bc072a2ed0caPratyush Anand dwc3_gadget_giveback(dep, req, -ESHUTDOWN); 5561591633ed6c4c3994944f31ddb59bc072a2ed0caPratyush Anand } 557ea53b8828c50b7a5138a8931c41b2671682c86b5Felipe Balbi } 558ea53b8828c50b7a5138a8931c41b2671682c86b5Felipe Balbi 55972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi while (!list_empty(&dep->request_list)) { 56072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req = next_request(&dep->request_list); 56172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 562624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior dwc3_gadget_giveback(dep, req, -ESHUTDOWN); 56372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 56472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 56572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 56672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/** 56772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * __dwc3_gadget_ep_disable - Disables a HW endpoint 56872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * @dep: the endpoint to disable 56972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 570624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior * This function also removes requests which are currently processed ny the 571624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior * hardware and those which are not yet scheduled. 572624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior * Caller should take care of locking. 57372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 57472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int __dwc3_gadget_ep_disable(struct dwc3_ep *dep) 57572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 57672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 57772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 57872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 579624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior dwc3_remove_requests(dwc, dep); 58072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 581687ef9817df7ed960d14575b9033dde3d04631feFelipe Balbi /* make sure HW endpoint isn't stalled */ 582687ef9817df7ed960d14575b9033dde3d04631feFelipe Balbi if (dep->flags & DWC3_EP_STALL) 5837a60855972f0d3c014093046cb6f013a1ee5bb19Felipe Balbi __dwc3_gadget_ep_set_halt(dep, 0, false); 584687ef9817df7ed960d14575b9033dde3d04631feFelipe Balbi 58572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DALEPENA); 58672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DALEPENA_EP(dep->number); 58772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DALEPENA, reg); 58872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 589879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dep->stream_capable = false; 590f9c56cdd3905c96c600456203637bd7ec8ec6383Ido Shayevitz dep->endpoint.desc = NULL; 591c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi dep->comp_desc = NULL; 59272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->type = 0; 593879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dep->flags = 0; 59472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 59572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 59672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 59772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 59872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 59972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 60072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep0_enable(struct usb_ep *ep, 60172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct usb_endpoint_descriptor *desc) 60272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 60372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EINVAL; 60472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 60572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 60672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep0_disable(struct usb_ep *ep) 60772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 60872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EINVAL; 60972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 61072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 61172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 61272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 61372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_enable(struct usb_ep *ep, 61472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct usb_endpoint_descriptor *desc) 61572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 61672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 61772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc; 61872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 61972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 62072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 62172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!ep || !desc || desc->bDescriptorType != USB_DT_ENDPOINT) { 62272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi pr_debug("dwc3: invalid parameters\n"); 62372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EINVAL; 62472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 62572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 62672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!desc->wMaxPacketSize) { 62772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi pr_debug("dwc3: missing wMaxPacketSize\n"); 62872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EINVAL; 62972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 63072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 63172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = to_dwc3_ep(ep); 63272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc = dep->dwc; 63372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 634c6f83f386c2f7987a344368e33e55840c12bd38fFelipe Balbi if (dep->flags & DWC3_EP_ENABLED) { 635c6f83f386c2f7987a344368e33e55840c12bd38fFelipe Balbi dev_WARN_ONCE(dwc->dev, true, "%s is already enabled\n", 636c6f83f386c2f7987a344368e33e55840c12bd38fFelipe Balbi dep->name); 637c6f83f386c2f7987a344368e33e55840c12bd38fFelipe Balbi return 0; 638c6f83f386c2f7987a344368e33e55840c12bd38fFelipe Balbi } 639c6f83f386c2f7987a344368e33e55840c12bd38fFelipe Balbi 64072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (usb_endpoint_type(desc)) { 64172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_ENDPOINT_XFER_CONTROL: 64227a78d6a283d6782438f72306746afe4bf44c215Anton Tikhomirov strlcat(dep->name, "-control", sizeof(dep->name)); 64372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 64472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_ENDPOINT_XFER_ISOC: 64527a78d6a283d6782438f72306746afe4bf44c215Anton Tikhomirov strlcat(dep->name, "-isoc", sizeof(dep->name)); 64672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 64772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_ENDPOINT_XFER_BULK: 64827a78d6a283d6782438f72306746afe4bf44c215Anton Tikhomirov strlcat(dep->name, "-bulk", sizeof(dep->name)); 64972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 65072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_ENDPOINT_XFER_INT: 65127a78d6a283d6782438f72306746afe4bf44c215Anton Tikhomirov strlcat(dep->name, "-int", sizeof(dep->name)); 65272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 65372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 65472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "invalid endpoint transfer type\n"); 65572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 65672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 65772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 658265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman ret = __dwc3_gadget_ep_enable(dep, desc, ep->comp_desc, false, false); 65972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 66072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 66172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 66272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 66372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 66472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_disable(struct usb_ep *ep) 66572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 66672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 66772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc; 66872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 66972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 67072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 67172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!ep) { 67272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi pr_debug("dwc3: invalid parameters\n"); 67372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EINVAL; 67472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 67572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 67672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = to_dwc3_ep(ep); 67772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc = dep->dwc; 67872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 67972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) { 68072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_WARN_ONCE(dwc->dev, true, "%s is already disabled\n", 68172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 68272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 68372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 68472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 68572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi snprintf(dep->name, sizeof(dep->name), "ep%d%s", 68672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->number >> 1, 68772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi (dep->number & 1) ? "in" : "out"); 68872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 68972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 69072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = __dwc3_gadget_ep_disable(dep); 69172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 69272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 69372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 69472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 69572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 69672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic struct usb_request *dwc3_gadget_ep_alloc_request(struct usb_ep *ep, 69772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi gfp_t gfp_flags) 69872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 69972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req; 70072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = to_dwc3_ep(ep); 70172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 70272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req = kzalloc(sizeof(*req), gfp_flags); 703734d5a5393ed8eedf70f13c7078cb4a6134f49f2Jingoo Han if (!req) 70472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return NULL; 70572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 70672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->epnum = dep->number; 70772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->dep = dep; 70872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 7092c4cbe6e5a9c71408b496e00a78ea9284e98af16Felipe Balbi trace_dwc3_alloc_request(req); 7102c4cbe6e5a9c71408b496e00a78ea9284e98af16Felipe Balbi 71172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return &req->request; 71272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 71372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 71472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_ep_free_request(struct usb_ep *ep, 71572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct usb_request *request) 71672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 71772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req = to_dwc3_request(request); 71872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 7192c4cbe6e5a9c71408b496e00a78ea9284e98af16Felipe Balbi trace_dwc3_free_request(req); 72072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi kfree(req); 72172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 72272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 723c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi/** 724c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi * dwc3_prepare_one_trb - setup one TRB from one request 725c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi * @dep: endpoint for which this request is prepared 726c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi * @req: dwc3_request pointer 727c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi */ 72868e823e24aea5227eaf20d6435485e733109d113Felipe Balbistatic void dwc3_prepare_one_trb(struct dwc3_ep *dep, 729eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi struct dwc3_request *req, dma_addr_t dma, 730e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand unsigned length, unsigned last, unsigned chain, unsigned node) 731c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi{ 732eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi struct dwc3 *dwc = dep->dwc; 733f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi struct dwc3_trb *trb; 734c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 735eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dev_vdbg(dwc->dev, "%s: req %p dma %08llx length %d%s%s\n", 736eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dep->name, req, (unsigned long long) dma, 737eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi length, last ? " last" : "", 738eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi chain ? " chain" : ""); 739eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi 740915e202aeeb59e272992a6364c910aaef3073544Pratyush Anand 741915e202aeeb59e272992a6364c910aaef3073544Pratyush Anand trb = &dep->trb_pool[dep->free_slot & DWC3_TRB_MASK]; 742c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 743eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (!req->trb) { 744eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dwc3_gadget_move_request_queued(req); 745f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi req->trb = trb; 746f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi req->trb_dma = dwc3_trb_dma_offset(dep, trb); 747e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand req->start_slot = dep->free_slot & DWC3_TRB_MASK; 748eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi } 749c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 750e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand dep->free_slot++; 7515cd8c48d95c10f729090c89757727e090719fd83Zhuang Jin Can /* Skip the LINK-TRB on ISOC */ 7525cd8c48d95c10f729090c89757727e090719fd83Zhuang Jin Can if (((dep->free_slot & DWC3_TRB_MASK) == DWC3_TRB_NUM - 1) && 7535cd8c48d95c10f729090c89757727e090719fd83Zhuang Jin Can usb_endpoint_xfer_isoc(dep->endpoint.desc)) 7545cd8c48d95c10f729090c89757727e090719fd83Zhuang Jin Can dep->free_slot++; 755e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand 756f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->size = DWC3_TRB_SIZE_LENGTH(length); 757f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->bpl = lower_32_bits(dma); 758f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->bph = upper_32_bits(dma); 759c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 76016e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz switch (usb_endpoint_type(dep->endpoint.desc)) { 761c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi case USB_ENDPOINT_XFER_CONTROL: 762f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->ctrl = DWC3_TRBCTL_CONTROL_SETUP; 763c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi break; 764c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 765c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi case USB_ENDPOINT_XFER_ISOC: 766e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if (!node) 767e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand trb->ctrl = DWC3_TRBCTL_ISOCHRONOUS_FIRST; 768e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand else 769e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand trb->ctrl = DWC3_TRBCTL_ISOCHRONOUS; 770c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi break; 771c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 772c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi case USB_ENDPOINT_XFER_BULK: 773c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi case USB_ENDPOINT_XFER_INT: 774f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->ctrl = DWC3_TRBCTL_NORMAL; 775c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi break; 776c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi default: 777c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi /* 778c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi * This is only possible with faulty memory because we 779c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi * checked it already :) 780c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi */ 781c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi BUG(); 782c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi } 783c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 784f3af36511e60669a2b5644d17378c7ea4e42d8b1Felipe Balbi if (!req->request.no_interrupt && !chain) 785f3af36511e60669a2b5644d17378c7ea4e42d8b1Felipe Balbi trb->ctrl |= DWC3_TRB_CTRL_IOC; 786f3af36511e60669a2b5644d17378c7ea4e42d8b1Felipe Balbi 78716e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if (usb_endpoint_xfer_isoc(dep->endpoint.desc)) { 788f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->ctrl |= DWC3_TRB_CTRL_ISP_IMI; 789f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->ctrl |= DWC3_TRB_CTRL_CSP; 790e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand } else if (last) { 791e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand trb->ctrl |= DWC3_TRB_CTRL_LST; 792f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi } 793c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 794e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if (chain) 795e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand trb->ctrl |= DWC3_TRB_CTRL_CHN; 796e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand 79716e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if (usb_endpoint_xfer_bulk(dep->endpoint.desc) && dep->stream_capable) 798f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->ctrl |= DWC3_TRB_CTRL_SID_SOFN(req->request.stream_id); 799c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 800f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->ctrl |= DWC3_TRB_CTRL_HWO; 8012c4cbe6e5a9c71408b496e00a78ea9284e98af16Felipe Balbi 8022c4cbe6e5a9c71408b496e00a78ea9284e98af16Felipe Balbi trace_dwc3_prepare_trb(dep, trb); 803c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi} 804c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 80572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* 80672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * dwc3_prepare_trbs - setup TRBs from requests 80772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * @dep: endpoint for which requests are being prepared 80872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * @starting: true if the endpoint is idle and no requests are queued. 80972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 8101d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * The function goes through the requests list and sets up TRBs for the 8111d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * transfers. The function returns once there are no more TRBs available or 8121d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * it runs out of requests. 81372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 81468e823e24aea5227eaf20d6435485e733109d113Felipe Balbistatic void dwc3_prepare_trbs(struct dwc3_ep *dep, bool starting) 81572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 81668e823e24aea5227eaf20d6435485e733109d113Felipe Balbi struct dwc3_request *req, *n; 81772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 trbs_left; 8188d62cd65d74d0e241b3a152f7347bb66126b705bPaul Zimmerman u32 max; 819c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi unsigned int last_one = 0; 82072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 82172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi BUILD_BUG_ON_NOT_POWER_OF_2(DWC3_TRB_NUM); 82272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 82372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* the first request must not be queued */ 82472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trbs_left = (dep->busy_slot - dep->free_slot) & DWC3_TRB_MASK; 825c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 8268d62cd65d74d0e241b3a152f7347bb66126b705bPaul Zimmerman /* Can't wrap around on a non-isoc EP since there's no link TRB */ 82716e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if (!usb_endpoint_xfer_isoc(dep->endpoint.desc)) { 8288d62cd65d74d0e241b3a152f7347bb66126b705bPaul Zimmerman max = DWC3_TRB_NUM - (dep->free_slot & DWC3_TRB_MASK); 8298d62cd65d74d0e241b3a152f7347bb66126b705bPaul Zimmerman if (trbs_left > max) 8308d62cd65d74d0e241b3a152f7347bb66126b705bPaul Zimmerman trbs_left = max; 8318d62cd65d74d0e241b3a152f7347bb66126b705bPaul Zimmerman } 8328d62cd65d74d0e241b3a152f7347bb66126b705bPaul Zimmerman 83372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 8341d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * If busy & slot are equal than it is either full or empty. If we are 8351d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * starting to process requests then we are empty. Otherwise we are 83672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * full and don't do anything 83772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 83872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!trbs_left) { 83972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!starting) 84068e823e24aea5227eaf20d6435485e733109d113Felipe Balbi return; 84172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trbs_left = DWC3_TRB_NUM; 84272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 84372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * In case we start from scratch, we queue the ISOC requests 84472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * starting from slot 1. This is done because we use ring 84572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * buffer and have no LST bit to stop us. Instead, we place 8461d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * IOC bit every TRB_NUM/4. We try to avoid having an interrupt 84772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * after the first request so we start at slot 1 and have 84872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 7 requests proceed before we hit the first IOC. 84972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Other transfer types don't use the ring buffer and are 85072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * processed from the first TRB until the last one. Since we 85172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * don't wrap around we have to start at the beginning. 85272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 85316e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if (usb_endpoint_xfer_isoc(dep->endpoint.desc)) { 85472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->busy_slot = 1; 85572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->free_slot = 1; 85672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 85772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->busy_slot = 0; 85872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->free_slot = 0; 85972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 86072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 86172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 86272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* The last TRB is a link TRB, not used for xfer */ 86316e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if ((trbs_left <= 1) && usb_endpoint_xfer_isoc(dep->endpoint.desc)) 86468e823e24aea5227eaf20d6435485e733109d113Felipe Balbi return; 86572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 86672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_for_each_entry_safe(req, n, &dep->request_list, list) { 867eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi unsigned length; 868eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dma_addr_t dma; 869e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand last_one = false; 87072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 871eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (req->request.num_mapped_sgs > 0) { 872eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi struct usb_request *request = &req->request; 873eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi struct scatterlist *sg = request->sg; 874eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi struct scatterlist *s; 875eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi int i; 87672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 877eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi for_each_sg(sg, s, request->num_mapped_sgs, i) { 878eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi unsigned chain = true; 87972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 880eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi length = sg_dma_len(s); 881eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dma = sg_dma_address(s); 88272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 8831d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman if (i == (request->num_mapped_sgs - 1) || 8841d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman sg_is_last(s)) { 885e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if (list_is_last(&req->list, 886e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand &dep->request_list)) 887e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand last_one = true; 888eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi chain = false; 889eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi } 89072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 891eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi trbs_left--; 892eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (!trbs_left) 893eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi last_one = true; 89472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 895eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (last_one) 896eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi chain = false; 89772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 898eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dwc3_prepare_one_trb(dep, req, dma, length, 899e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand last_one, chain, i); 90072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 901eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (last_one) 902eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi break; 903eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi } 90472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 905eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dma = req->request.dma; 906eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi length = req->request.length; 907eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi trbs_left--; 90872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 909eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (!trbs_left) 910eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi last_one = 1; 911879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi 912eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi /* Is this the last request? */ 913eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (list_is_last(&req->list, &dep->request_list)) 914eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi last_one = 1; 91572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 916eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dwc3_prepare_one_trb(dep, req, dma, length, 917e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand last_one, false, 0); 91872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 919eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (last_one) 920eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi break; 92172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 92272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 92372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 92472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 92572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int __dwc3_gadget_kick_transfer(struct dwc3_ep *dep, u16 cmd_param, 92672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int start_new) 92772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 92872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 92972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req; 93072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 93172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 93272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 cmd; 93372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 93472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (start_new && (dep->flags & DWC3_EP_BUSY)) { 93572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s: endpoint busy\n", dep->name); 93672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EBUSY; 93772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 93872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags &= ~DWC3_EP_PENDING_REQUEST; 93972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 94072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 94172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * If we are getting here after a short-out-packet we don't enqueue any 94272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * new requests as we try to set the IOC bit only on the last request. 94372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 94472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (start_new) { 94572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (list_empty(&dep->req_queued)) 94672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_prepare_trbs(dep, start_new); 94772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 94872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* req points to the first request which will be sent */ 94972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req = next_request(&dep->req_queued); 95072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 95168e823e24aea5227eaf20d6435485e733109d113Felipe Balbi dwc3_prepare_trbs(dep, start_new); 95268e823e24aea5227eaf20d6435485e733109d113Felipe Balbi 95372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 9541d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * req points to the first request where HWO changed from 0 to 1 95572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 95668e823e24aea5227eaf20d6435485e733109d113Felipe Balbi req = next_request(&dep->req_queued); 95772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 95872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!req) { 95972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags |= DWC3_EP_PENDING_REQUEST; 96072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 96172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 96272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 96372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0, sizeof(params)); 96472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 9651877d6c9a57802d50a059cf2dacdba10168cece7Pratyush Anand if (start_new) { 9661877d6c9a57802d50a059cf2dacdba10168cece7Pratyush Anand params.param0 = upper_32_bits(req->trb_dma); 9671877d6c9a57802d50a059cf2dacdba10168cece7Pratyush Anand params.param1 = lower_32_bits(req->trb_dma); 96872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd = DWC3_DEPCMD_STARTTRANSFER; 9691877d6c9a57802d50a059cf2dacdba10168cece7Pratyush Anand } else { 97072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd = DWC3_DEPCMD_UPDATETRANSFER; 9711877d6c9a57802d50a059cf2dacdba10168cece7Pratyush Anand } 97272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 97372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd |= DWC3_DEPCMD_PARAM(cmd_param); 97472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, cmd, ¶ms); 97572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret < 0) { 97672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "failed to send STARTTRANSFER command\n"); 97772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 97872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 97972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * FIXME we need to iterate over the list of requests 98072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * here and stop, unmap, free and del each of the linked 9811d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * requests instead of what we do now. 98272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 9830fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi usb_gadget_unmap_request(&dwc->gadget, &req->request, 9840fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi req->direction); 98572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_del(&req->list); 98672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 98772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 98872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 98972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags |= DWC3_EP_BUSY; 99025b8ff68bf1d4954d4a9dcb4862c6b6a53cb09e2Felipe Balbi 991f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman if (start_new) { 992b4996a8631e80a2aaddb5c487ff6b9ad37315f70Felipe Balbi dep->resource_index = dwc3_gadget_ep_get_transfer_index(dwc, 993f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman dep->number); 994b4996a8631e80a2aaddb5c487ff6b9ad37315f70Felipe Balbi WARN_ON_ONCE(!dep->resource_index); 995f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman } 99625b8ff68bf1d4954d4a9dcb4862c6b6a53cb09e2Felipe Balbi 99772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 99872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 99972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1000d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anandstatic void __dwc3_gadget_start_isoc(struct dwc3 *dwc, 1001d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand struct dwc3_ep *dep, u32 cur_uf) 1002d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand{ 1003d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand u32 uf; 1004d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand 1005d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand if (list_empty(&dep->request_list)) { 1006d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand dev_vdbg(dwc->dev, "ISOC ep %s run out for requests.\n", 1007d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand dep->name); 1008f4a53c55117b82e895ec98b1765c9d66940377fcPratyush Anand dep->flags |= DWC3_EP_PENDING_REQUEST; 1009d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand return; 1010d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand } 1011d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand 1012d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand /* 4 micro frames in the future */ 1013d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand uf = cur_uf + dep->interval * 4; 1014d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand 1015d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand __dwc3_gadget_kick_transfer(dep, uf, 1); 1016d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand} 1017d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand 1018d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anandstatic void dwc3_gadget_start_isoc(struct dwc3 *dwc, 1019d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand struct dwc3_ep *dep, const struct dwc3_event_depevt *event) 1020d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand{ 1021d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand u32 cur_uf, mask; 1022d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand 1023d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand mask = ~(dep->interval - 1); 1024d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand cur_uf = event->parameters & mask; 1025d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand 1026d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand __dwc3_gadget_start_isoc(dwc, dep, cur_uf); 1027d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand} 1028d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand 102972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int __dwc3_gadget_ep_queue(struct dwc3_ep *dep, struct dwc3_request *req) 103072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 10310fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi struct dwc3 *dwc = dep->dwc; 10320fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi int ret; 10330fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi 103472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.actual = 0; 103572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.status = -EINPROGRESS; 103672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->direction = dep->direction; 103772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->epnum = dep->number; 103872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 103972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 104072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We only add to our list of requests now and 104172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * start consuming the list once we get XferNotReady 104272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * IRQ. 104372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 104472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * That way, we avoid doing anything that we don't need 104572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * to do now and defer it until the point we receive a 104672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * particular token from the Host side. 104772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 104872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * This will also avoid Host cancelling URBs due to too 10491d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * many NAKs. 105072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 10510fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi ret = usb_gadget_map_request(&dwc->gadget, &req->request, 10520fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi dep->direction); 10530fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi if (ret) 10540fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi return ret; 10550fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi 105672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_add_tail(&req->list, &dep->request_list); 105772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 105872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 1059b511e5e76bf488cd3eec1048483a3898393a4dcaFelipe Balbi * There are a few special cases: 106072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 1061f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman * 1. XferNotReady with empty list of requests. We need to kick the 1062f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman * transfer here in that situation, otherwise we will be NAKing 1063f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman * forever. If we get XferNotReady before gadget driver has a 1064f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman * chance to queue a request, we will ACK the IRQ but won't be 1065f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman * able to receive the data until the next request is queued. 1066f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman * The following code is handling exactly that. 106772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 106872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 106972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->flags & DWC3_EP_PENDING_REQUEST) { 1070f4a53c55117b82e895ec98b1765c9d66940377fcPratyush Anand /* 1071f4a53c55117b82e895ec98b1765c9d66940377fcPratyush Anand * If xfernotready is already elapsed and it is a case 1072f4a53c55117b82e895ec98b1765c9d66940377fcPratyush Anand * of isoc transfer, then issue END TRANSFER, so that 1073f4a53c55117b82e895ec98b1765c9d66940377fcPratyush Anand * you can receive xfernotready again and can have 1074f4a53c55117b82e895ec98b1765c9d66940377fcPratyush Anand * notion of current microframe. 1075f4a53c55117b82e895ec98b1765c9d66940377fcPratyush Anand */ 1076f4a53c55117b82e895ec98b1765c9d66940377fcPratyush Anand if (usb_endpoint_xfer_isoc(dep->endpoint.desc)) { 1077cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand if (list_empty(&dep->req_queued)) { 1078b992e6813e257269e9599ca07be8bd52df784bf5Paul Zimmerman dwc3_stop_active_transfer(dwc, dep->number, true); 1079cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand dep->flags = DWC3_EP_ENABLED; 1080cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand } 1081f4a53c55117b82e895ec98b1765c9d66940377fcPratyush Anand return 0; 1082f4a53c55117b82e895ec98b1765c9d66940377fcPratyush Anand } 1083f4a53c55117b82e895ec98b1765c9d66940377fcPratyush Anand 1084b511e5e76bf488cd3eec1048483a3898393a4dcaFelipe Balbi ret = __dwc3_gadget_kick_transfer(dep, 0, true); 1085348e026fafe2501281db5fb7fed599b337cad358Moiz Sonasath if (ret && ret != -EBUSY) 1086b511e5e76bf488cd3eec1048483a3898393a4dcaFelipe Balbi dev_dbg(dwc->dev, "%s: failed to kick transfers\n", 1087b511e5e76bf488cd3eec1048483a3898393a4dcaFelipe Balbi dep->name); 108815f86bde29f0fdfb877d9c753547fa2e2f5ef1fePratyush Anand return ret; 1089b511e5e76bf488cd3eec1048483a3898393a4dcaFelipe Balbi } 109072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1091b511e5e76bf488cd3eec1048483a3898393a4dcaFelipe Balbi /* 1092b511e5e76bf488cd3eec1048483a3898393a4dcaFelipe Balbi * 2. XferInProgress on Isoc EP with an active transfer. We need to 1093b511e5e76bf488cd3eec1048483a3898393a4dcaFelipe Balbi * kick the transfer here after queuing a request, otherwise the 1094b511e5e76bf488cd3eec1048483a3898393a4dcaFelipe Balbi * core may not see the modified TRB(s). 1095b511e5e76bf488cd3eec1048483a3898393a4dcaFelipe Balbi */ 1096b511e5e76bf488cd3eec1048483a3898393a4dcaFelipe Balbi if (usb_endpoint_xfer_isoc(dep->endpoint.desc) && 109779c9046ec52b5aaa9f055e3d928d676dd37a6f9dPratyush Anand (dep->flags & DWC3_EP_BUSY) && 109879c9046ec52b5aaa9f055e3d928d676dd37a6f9dPratyush Anand !(dep->flags & DWC3_EP_MISSED_ISOC)) { 1099b4996a8631e80a2aaddb5c487ff6b9ad37315f70Felipe Balbi WARN_ON_ONCE(!dep->resource_index); 1100b4996a8631e80a2aaddb5c487ff6b9ad37315f70Felipe Balbi ret = __dwc3_gadget_kick_transfer(dep, dep->resource_index, 1101b511e5e76bf488cd3eec1048483a3898393a4dcaFelipe Balbi false); 1102348e026fafe2501281db5fb7fed599b337cad358Moiz Sonasath if (ret && ret != -EBUSY) 110372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "%s: failed to kick transfers\n", 110472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 110515f86bde29f0fdfb877d9c753547fa2e2f5ef1fePratyush Anand return ret; 1106a092532483e3200a53c8b1170b3988cc668c07efFelipe Balbi } 110772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1108b997ada5db905e24494bcc689c7b2c07d278ca27Felipe Balbi /* 1109b997ada5db905e24494bcc689c7b2c07d278ca27Felipe Balbi * 4. Stream Capable Bulk Endpoints. We need to start the transfer 1110b997ada5db905e24494bcc689c7b2c07d278ca27Felipe Balbi * right away, otherwise host will not know we have streams to be 1111b997ada5db905e24494bcc689c7b2c07d278ca27Felipe Balbi * handled. 1112b997ada5db905e24494bcc689c7b2c07d278ca27Felipe Balbi */ 1113b997ada5db905e24494bcc689c7b2c07d278ca27Felipe Balbi if (dep->stream_capable) { 1114b997ada5db905e24494bcc689c7b2c07d278ca27Felipe Balbi int ret; 1115b997ada5db905e24494bcc689c7b2c07d278ca27Felipe Balbi 1116b997ada5db905e24494bcc689c7b2c07d278ca27Felipe Balbi ret = __dwc3_gadget_kick_transfer(dep, 0, true); 1117b997ada5db905e24494bcc689c7b2c07d278ca27Felipe Balbi if (ret && ret != -EBUSY) { 1118b997ada5db905e24494bcc689c7b2c07d278ca27Felipe Balbi struct dwc3 *dwc = dep->dwc; 1119b997ada5db905e24494bcc689c7b2c07d278ca27Felipe Balbi 1120b997ada5db905e24494bcc689c7b2c07d278ca27Felipe Balbi dev_dbg(dwc->dev, "%s: failed to kick transfers\n", 1121b997ada5db905e24494bcc689c7b2c07d278ca27Felipe Balbi dep->name); 1122b997ada5db905e24494bcc689c7b2c07d278ca27Felipe Balbi } 1123b997ada5db905e24494bcc689c7b2c07d278ca27Felipe Balbi } 1124b997ada5db905e24494bcc689c7b2c07d278ca27Felipe Balbi 112572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 112672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 112772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 112872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_queue(struct usb_ep *ep, struct usb_request *request, 112972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi gfp_t gfp_flags) 113072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 113172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req = to_dwc3_request(request); 113272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = to_dwc3_ep(ep); 113372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 113472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 113572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 113672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 113772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 113872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1139fdee4ebac96bb44c9c488fdd830b7cc831cd295dZhuang Jin Can spin_lock_irqsave(&dwc->lock, flags); 114016e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if (!dep->endpoint.desc) { 114172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "trying to queue request %p to disabled %s\n", 114272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi request, ep->name); 1143fdee4ebac96bb44c9c488fdd830b7cc831cd295dZhuang Jin Can spin_unlock_irqrestore(&dwc->lock, flags); 114472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -ESHUTDOWN; 114572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 114672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 114772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "queing request %p to %s length %d\n", 114872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi request, ep->name, request->length); 11492c4cbe6e5a9c71408b496e00a78ea9284e98af16Felipe Balbi trace_dwc3_ep_queue(req); 115072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 115172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = __dwc3_gadget_ep_queue(dep, req); 115272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 115372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 115472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 115572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 115672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 115772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_dequeue(struct usb_ep *ep, 115872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct usb_request *request) 115972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 116072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req = to_dwc3_request(request); 116172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *r = NULL; 116272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 116372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = to_dwc3_ep(ep); 116472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 116572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 116672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 116772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret = 0; 116872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 11692c4cbe6e5a9c71408b496e00a78ea9284e98af16Felipe Balbi trace_dwc3_ep_dequeue(req); 11702c4cbe6e5a9c71408b496e00a78ea9284e98af16Felipe Balbi 117172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 117272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 117372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_for_each_entry(r, &dep->request_list, list) { 117472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (r == req) 117572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 117672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 117772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 117872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (r != req) { 117972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_for_each_entry(r, &dep->req_queued, list) { 118072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (r == req) 118172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 118272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 118372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (r == req) { 118472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* wait until it is processed */ 1185b992e6813e257269e9599ca07be8bd52df784bf5Paul Zimmerman dwc3_stop_active_transfer(dwc, dep->number, true); 1186e8d4e8be860d935099ffcf695dcd29b55ae50b36Pratyush Anand goto out1; 118772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 118872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "request %p was not queued to %s\n", 118972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi request, ep->name); 119072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EINVAL; 119172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto out0; 119272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 119372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1194e8d4e8be860d935099ffcf695dcd29b55ae50b36Pratyush Anandout1: 119572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* giveback the request */ 119672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_giveback(dep, req, -ECONNRESET); 119772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 119872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiout0: 119972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 120072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 120172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 120272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 120372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 12047a60855972f0d3c014093046cb6f013a1ee5bb19Felipe Balbiint __dwc3_gadget_ep_set_halt(struct dwc3_ep *dep, int value, int protocol) 120572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 120672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 120772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 120872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 120972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 12105ad02fb813a9d8f39af1ccb1f2166cc80fd76f09Felipe Balbi if (usb_endpoint_xfer_isoc(dep->endpoint.desc)) { 12115ad02fb813a9d8f39af1ccb1f2166cc80fd76f09Felipe Balbi dev_err(dwc->dev, "%s is of Isochronous type\n", dep->name); 12125ad02fb813a9d8f39af1ccb1f2166cc80fd76f09Felipe Balbi return -EINVAL; 12135ad02fb813a9d8f39af1ccb1f2166cc80fd76f09Felipe Balbi } 12145ad02fb813a9d8f39af1ccb1f2166cc80fd76f09Felipe Balbi 121572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0x00, sizeof(params)); 121672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 121772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (value) { 12187a60855972f0d3c014093046cb6f013a1ee5bb19Felipe Balbi if (!protocol && ((dep->direction && dep->flags & DWC3_EP_BUSY) || 12197a60855972f0d3c014093046cb6f013a1ee5bb19Felipe Balbi (!list_empty(&dep->req_queued) || 12207a60855972f0d3c014093046cb6f013a1ee5bb19Felipe Balbi !list_empty(&dep->request_list)))) { 12217a60855972f0d3c014093046cb6f013a1ee5bb19Felipe Balbi dev_dbg(dwc->dev, "%s: pending request, cannot halt\n", 12227a60855972f0d3c014093046cb6f013a1ee5bb19Felipe Balbi dep->name); 12237a60855972f0d3c014093046cb6f013a1ee5bb19Felipe Balbi return -EAGAIN; 12247a60855972f0d3c014093046cb6f013a1ee5bb19Felipe Balbi } 12257a60855972f0d3c014093046cb6f013a1ee5bb19Felipe Balbi 122672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, 122772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEPCMD_SETSTALL, ¶ms); 122872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 12293f89204bae896e1d44468886a646b84acadc3c8fDan Carpenter dev_err(dwc->dev, "failed to set STALL on %s\n", 123072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 123172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi else 123272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags |= DWC3_EP_STALL; 123372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 123472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, 123572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEPCMD_CLEARSTALL, ¶ms); 123672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 12373f89204bae896e1d44468886a646b84acadc3c8fDan Carpenter dev_err(dwc->dev, "failed to clear STALL on %s\n", 123872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 123972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi else 1240a535d81c92615b8ffb99b7e1fd1fb01effaed1afAlan Stern dep->flags &= ~(DWC3_EP_STALL | DWC3_EP_WEDGE); 124172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 12425275455a6e6ae6b57303834b0afd267bb9657ffcPaul Zimmerman 124372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 124472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 124572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 124672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_set_halt(struct usb_ep *ep, int value) 124772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 124872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = to_dwc3_ep(ep); 124972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 125072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 125172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 125272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 125372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 125472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 125572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 12567a60855972f0d3c014093046cb6f013a1ee5bb19Felipe Balbi ret = __dwc3_gadget_ep_set_halt(dep, value, false); 125772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 125872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 125972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 126072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 126172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 126272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_set_wedge(struct usb_ep *ep) 126372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 126472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = to_dwc3_ep(ep); 1265249a456930cd2df29d085fb738b0e8f4bc1680cfPaul Zimmerman struct dwc3 *dwc = dep->dwc; 1266249a456930cd2df29d085fb738b0e8f4bc1680cfPaul Zimmerman unsigned long flags; 126795aa4e8d658778f787e2ce205d3018443d027477Felipe Balbi int ret; 126872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1269249a456930cd2df29d085fb738b0e8f4bc1680cfPaul Zimmerman spin_lock_irqsave(&dwc->lock, flags); 127072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags |= DWC3_EP_WEDGE; 127172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 127208f0d96670c53898b4154e7945e77cdd966003f7Pratyush Anand if (dep->number == 0 || dep->number == 1) 127395aa4e8d658778f787e2ce205d3018443d027477Felipe Balbi ret = __dwc3_gadget_ep0_set_halt(ep, 1); 127408f0d96670c53898b4154e7945e77cdd966003f7Pratyush Anand else 12757a60855972f0d3c014093046cb6f013a1ee5bb19Felipe Balbi ret = __dwc3_gadget_ep_set_halt(dep, 1, false); 127695aa4e8d658778f787e2ce205d3018443d027477Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 127795aa4e8d658778f787e2ce205d3018443d027477Felipe Balbi 127895aa4e8d658778f787e2ce205d3018443d027477Felipe Balbi return ret; 127972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 128072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 128172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 128272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 128372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic struct usb_endpoint_descriptor dwc3_gadget_ep0_desc = { 128472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .bLength = USB_DT_ENDPOINT_SIZE, 128572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .bDescriptorType = USB_DT_ENDPOINT, 128672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .bmAttributes = USB_ENDPOINT_XFER_CONTROL, 128772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi}; 128872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 128972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic const struct usb_ep_ops dwc3_gadget_ep0_ops = { 129072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .enable = dwc3_gadget_ep0_enable, 129172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .disable = dwc3_gadget_ep0_disable, 129272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .alloc_request = dwc3_gadget_ep_alloc_request, 129372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .free_request = dwc3_gadget_ep_free_request, 129472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .queue = dwc3_gadget_ep0_queue, 129572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .dequeue = dwc3_gadget_ep_dequeue, 129608f0d96670c53898b4154e7945e77cdd966003f7Pratyush Anand .set_halt = dwc3_gadget_ep0_set_halt, 129772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .set_wedge = dwc3_gadget_ep_set_wedge, 129872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi}; 129972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 130072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic const struct usb_ep_ops dwc3_gadget_ep_ops = { 130172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .enable = dwc3_gadget_ep_enable, 130272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .disable = dwc3_gadget_ep_disable, 130372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .alloc_request = dwc3_gadget_ep_alloc_request, 130472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .free_request = dwc3_gadget_ep_free_request, 130572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .queue = dwc3_gadget_ep_queue, 130672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .dequeue = dwc3_gadget_ep_dequeue, 130772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .set_halt = dwc3_gadget_ep_set_halt, 130872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .set_wedge = dwc3_gadget_ep_set_wedge, 130972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi}; 131072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 131172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 131272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 131372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_get_frame(struct usb_gadget *g) 131472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 131572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 131672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 131772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 131872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 131972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return DWC3_DSTS_SOFFN(reg); 132072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 132172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 132272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_wakeup(struct usb_gadget *g) 132372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 132472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 132572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 132672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long timeout; 132772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 132872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 132972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 133072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 133172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret = 0; 133272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 133372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 link_state; 133472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 speed; 133572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 133672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 133772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 133872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 133972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * According to the Databook Remote wakeup request should 134072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * be issued only when the device is in early suspend state. 134172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 134272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We can check that via USB Link State bits in DSTS register. 134372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 134472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 134572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 134672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi speed = reg & DWC3_DSTS_CONNECTSPD; 134772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (speed == DWC3_DSTS_SUPERSPEED) { 134872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "no wakeup on SuperSpeed\n"); 134972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EINVAL; 135072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto out; 135172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 135272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 135372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi link_state = DWC3_DSTS_USBLNKST(reg); 135472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 135572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (link_state) { 135672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_LINK_STATE_RX_DET: /* in HS, means Early Suspend */ 135772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_LINK_STATE_U3: /* in HS, means SUSPEND */ 135872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 135972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 136072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "can't wakeup from link state %d\n", 136172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi link_state); 136272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EINVAL; 136372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto out; 136472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 136572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 13668598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi ret = dwc3_gadget_set_link_state(dwc, DWC3_LINK_STATE_RECOV); 13678598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi if (ret < 0) { 13688598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi dev_err(dwc->dev, "failed to put link in Recovery\n"); 13698598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi goto out; 13708598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi } 137172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1372802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman /* Recent versions do this automatically */ 1373802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman if (dwc->revision < DWC3_REVISION_194A) { 1374802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman /* write zeroes to Link Change Request */ 1375fcc023c726b5879d8f3f0f0f48c45d09055272c4Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 1376802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman reg &= ~DWC3_DCTL_ULSTCHNGREQ_MASK; 1377802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman dwc3_writel(dwc->regs, DWC3_DCTL, reg); 1378802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman } 137972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 13801d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman /* poll until Link State changes to ON */ 138172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi timeout = jiffies + msecs_to_jiffies(100); 138272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 13831d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman while (!time_after(jiffies, timeout)) { 138472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 138572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 138672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* in HS, means ON */ 138772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (DWC3_DSTS_USBLNKST(reg) == DWC3_LINK_STATE_U0) 138872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 138972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 139072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 139172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (DWC3_DSTS_USBLNKST(reg) != DWC3_LINK_STATE_U0) { 139272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to send remote wakeup\n"); 139372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EINVAL; 139472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 139572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 139672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiout: 139772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 139872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 139972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 140072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 140172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 140272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_set_selfpowered(struct usb_gadget *g, 140372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int is_selfpowered) 140472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 140572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 1406249a456930cd2df29d085fb738b0e8f4bc1680cfPaul Zimmerman unsigned long flags; 140772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1408249a456930cd2df29d085fb738b0e8f4bc1680cfPaul Zimmerman spin_lock_irqsave(&dwc->lock, flags); 140972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->is_selfpowered = !!is_selfpowered; 1410249a456930cd2df29d085fb738b0e8f4bc1680cfPaul Zimmerman spin_unlock_irqrestore(&dwc->lock, flags); 141172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 141272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 141372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 141472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 14157b2a0368bbc9bc4a7936d8587eaff4b8c35b2247Felipe Balbistatic int dwc3_gadget_run_stop(struct dwc3 *dwc, int is_on, int suspend) 141672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 141772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 141861d58242f634642de42d6a4098913b7254a65053Sebastian Andrzej Siewior u32 timeout = 500; 141972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 142072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 14218db7ed15f2557e26371e4b2d98fee290d992b715Felipe Balbi if (is_on) { 1422802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman if (dwc->revision <= DWC3_REVISION_187A) { 1423802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman reg &= ~DWC3_DCTL_TRGTULST_MASK; 1424802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman reg |= DWC3_DCTL_TRGTULST_RX_DET; 1425802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman } 1426802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman 1427802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman if (dwc->revision >= DWC3_REVISION_194A) 1428802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman reg &= ~DWC3_DCTL_KEEP_CONNECT; 1429802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman reg |= DWC3_DCTL_RUN_STOP; 14307b2a0368bbc9bc4a7936d8587eaff4b8c35b2247Felipe Balbi 14317b2a0368bbc9bc4a7936d8587eaff4b8c35b2247Felipe Balbi if (dwc->has_hibernation) 14327b2a0368bbc9bc4a7936d8587eaff4b8c35b2247Felipe Balbi reg |= DWC3_DCTL_KEEP_CONNECT; 14337b2a0368bbc9bc4a7936d8587eaff4b8c35b2247Felipe Balbi 14349fcb3bd8d12db29c101d3722d37ddef9d1915317Felipe Balbi dwc->pullups_connected = true; 14358db7ed15f2557e26371e4b2d98fee290d992b715Felipe Balbi } else { 143672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DCTL_RUN_STOP; 14377b2a0368bbc9bc4a7936d8587eaff4b8c35b2247Felipe Balbi 14387b2a0368bbc9bc4a7936d8587eaff4b8c35b2247Felipe Balbi if (dwc->has_hibernation && !suspend) 14397b2a0368bbc9bc4a7936d8587eaff4b8c35b2247Felipe Balbi reg &= ~DWC3_DCTL_KEEP_CONNECT; 14407b2a0368bbc9bc4a7936d8587eaff4b8c35b2247Felipe Balbi 14419fcb3bd8d12db29c101d3722d37ddef9d1915317Felipe Balbi dwc->pullups_connected = false; 14428db7ed15f2557e26371e4b2d98fee290d992b715Felipe Balbi } 144372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 144472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 144572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 144672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi do { 144772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 144872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (is_on) { 144972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(reg & DWC3_DSTS_DEVCTRLHLT)) 145072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 145172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 145272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (reg & DWC3_DSTS_DEVCTRLHLT) 145372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 145472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 145572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi timeout--; 145672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!timeout) 14576f17f74b3d8345663f5fcfd834145685110075bdPratyush Anand return -ETIMEDOUT; 145861d58242f634642de42d6a4098913b7254a65053Sebastian Andrzej Siewior udelay(1); 145972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } while (1); 146072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 146172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "gadget %s data soft-%s\n", 146272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver 146372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ? dwc->gadget_driver->function : "no-function", 146472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi is_on ? "connect" : "disconnect"); 14656f17f74b3d8345663f5fcfd834145685110075bdPratyush Anand 14666f17f74b3d8345663f5fcfd834145685110075bdPratyush Anand return 0; 146772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 146872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 146972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_pullup(struct usb_gadget *g, int is_on) 147072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 147172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 147272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 14736f17f74b3d8345663f5fcfd834145685110075bdPratyush Anand int ret; 147472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 147572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi is_on = !!is_on; 147672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 147772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 14787b2a0368bbc9bc4a7936d8587eaff4b8c35b2247Felipe Balbi ret = dwc3_gadget_run_stop(dwc, is_on, false); 147972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 148072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 14816f17f74b3d8345663f5fcfd834145685110075bdPratyush Anand return ret; 148272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 148372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 14848698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbistatic void dwc3_gadget_enable_irq(struct dwc3 *dwc) 14858698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi{ 14868698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi u32 reg; 14878698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi 14888698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi /* Enable all but Start and End of Frame IRQs */ 14898698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi reg = (DWC3_DEVTEN_VNDRDEVTSTRCVEDEN | 14908698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi DWC3_DEVTEN_EVNTOVERFLOWEN | 14918698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi DWC3_DEVTEN_CMDCMPLTEN | 14928698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi DWC3_DEVTEN_ERRTICERREN | 14938698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi DWC3_DEVTEN_WKUPEVTEN | 14948698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi DWC3_DEVTEN_ULSTCNGEN | 14958698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi DWC3_DEVTEN_CONNECTDONEEN | 14968698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi DWC3_DEVTEN_USBRSTEN | 14978698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi DWC3_DEVTEN_DISCONNEVTEN); 14988698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi 14998698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEVTEN, reg); 15008698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi} 15018698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi 15028698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbistatic void dwc3_gadget_disable_irq(struct dwc3 *dwc) 15038698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi{ 15048698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi /* mask all interrupts */ 15058698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEVTEN, 0x00); 15068698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi} 15078698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi 15088698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbistatic irqreturn_t dwc3_interrupt(int irq, void *_dwc); 1509b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbistatic irqreturn_t dwc3_thread_interrupt(int irq, void *_dwc); 15108698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi 151172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_start(struct usb_gadget *g, 151272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct usb_gadget_driver *driver) 151372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 151472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 151572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 151672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 151772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret = 0; 15188698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi int irq; 151972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 152072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1521b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi irq = platform_get_irq(to_platform_device(dwc->dev), 0); 1522b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi ret = request_threaded_irq(irq, dwc3_interrupt, dwc3_thread_interrupt, 1523e8adfc30ff9282a728fd8b666b6418308164c415Felipe Balbi IRQF_SHARED, "dwc3", dwc); 1524b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi if (ret) { 1525b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi dev_err(dwc->dev, "failed to request irq #%d --> %d\n", 1526b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi irq, ret); 1527b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi goto err0; 1528b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi } 1529b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi 153072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 153172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 153272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dwc->gadget_driver) { 153372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "%s is already bound to %s\n", 153472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.name, 153572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver->driver.name); 153672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EBUSY; 1537b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi goto err1; 153872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 153972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 154072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver = driver; 154172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 154272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCFG); 154372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~(DWC3_DCFG_SPEED_MASK); 154407e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi 154507e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi /** 154607e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * WORKAROUND: DWC3 revision < 2.20a have an issue 154707e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * which would cause metastability state on Run/Stop 154807e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * bit if we try to force the IP to USB2-only mode. 154907e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * 155007e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * Because of that, we cannot configure the IP to any 155107e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * speed other than the SuperSpeed 155207e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * 155307e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * Refers to: 155407e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * 155507e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * STAR#9000525659: Clock Domain Crossing on DCTL in 155607e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * USB 2.0 Mode 155707e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi */ 1558f7e846f0956917888b28b52726ee8779a39d84b6Felipe Balbi if (dwc->revision < DWC3_REVISION_220A) { 155907e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi reg |= DWC3_DCFG_SUPERSPEED; 1560f7e846f0956917888b28b52726ee8779a39d84b6Felipe Balbi } else { 1561f7e846f0956917888b28b52726ee8779a39d84b6Felipe Balbi switch (dwc->maximum_speed) { 1562f7e846f0956917888b28b52726ee8779a39d84b6Felipe Balbi case USB_SPEED_LOW: 1563f7e846f0956917888b28b52726ee8779a39d84b6Felipe Balbi reg |= DWC3_DSTS_LOWSPEED; 1564f7e846f0956917888b28b52726ee8779a39d84b6Felipe Balbi break; 1565f7e846f0956917888b28b52726ee8779a39d84b6Felipe Balbi case USB_SPEED_FULL: 1566f7e846f0956917888b28b52726ee8779a39d84b6Felipe Balbi reg |= DWC3_DSTS_FULLSPEED1; 1567f7e846f0956917888b28b52726ee8779a39d84b6Felipe Balbi break; 1568f7e846f0956917888b28b52726ee8779a39d84b6Felipe Balbi case USB_SPEED_HIGH: 1569f7e846f0956917888b28b52726ee8779a39d84b6Felipe Balbi reg |= DWC3_DSTS_HIGHSPEED; 1570f7e846f0956917888b28b52726ee8779a39d84b6Felipe Balbi break; 1571f7e846f0956917888b28b52726ee8779a39d84b6Felipe Balbi case USB_SPEED_SUPER: /* FALLTHROUGH */ 1572f7e846f0956917888b28b52726ee8779a39d84b6Felipe Balbi case USB_SPEED_UNKNOWN: /* FALTHROUGH */ 1573f7e846f0956917888b28b52726ee8779a39d84b6Felipe Balbi default: 1574f7e846f0956917888b28b52726ee8779a39d84b6Felipe Balbi reg |= DWC3_DSTS_SUPERSPEED; 1575f7e846f0956917888b28b52726ee8779a39d84b6Felipe Balbi } 1576f7e846f0956917888b28b52726ee8779a39d84b6Felipe Balbi } 157772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCFG, reg); 157872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1579b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman dwc->start_config_issued = false; 1580b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman 158172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* Start with SuperSpeed Default */ 158272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(512); 158372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 158472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[0]; 1585265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL, false, 1586265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman false); 158772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 158872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to enable %s\n", dep->name); 1589b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi goto err2; 159072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 159172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 159272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[1]; 1593265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL, false, 1594265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman false); 159572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 159672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to enable %s\n", dep->name); 1597b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi goto err3; 159872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 159972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 160072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* begin to receive SETUP packets */ 1601c7fcdeb2627c46b7ec3f0bcb2054b10405f9a70eFelipe Balbi dwc->ep0state = EP0_SETUP_PHASE; 160272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_ep0_out_start(dwc); 160372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 16048698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi dwc3_gadget_enable_irq(dwc); 16058698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi 160672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 160772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 160872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 160972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1610b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbierr3: 161172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi __dwc3_gadget_ep_disable(dwc->eps[0]); 161272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1613b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbierr2: 1614cdcedd6981194e511cc206887db661d016069d68Felipe Balbi dwc->gadget_driver = NULL; 1615b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi 1616b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbierr1: 161772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 161872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1619b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi free_irq(irq, dwc); 1620b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi 1621b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbierr0: 162272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 162372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 162472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 162572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_stop(struct usb_gadget *g, 162672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct usb_gadget_driver *driver) 162772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 162872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 162972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 16308698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi int irq; 163172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 163272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 163372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 16348698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi dwc3_gadget_disable_irq(dwc); 163572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi __dwc3_gadget_ep_disable(dwc->eps[0]); 163672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi __dwc3_gadget_ep_disable(dwc->eps[1]); 163772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 163872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver = NULL; 163972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 164072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 164172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1642b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi irq = platform_get_irq(to_platform_device(dwc->dev), 0); 1643b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi free_irq(irq, dwc); 1644b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi 164572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 164672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 1647802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman 164872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic const struct usb_gadget_ops dwc3_gadget_ops = { 164972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .get_frame = dwc3_gadget_get_frame, 165072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .wakeup = dwc3_gadget_wakeup, 165172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .set_selfpowered = dwc3_gadget_set_selfpowered, 165272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .pullup = dwc3_gadget_pullup, 165372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .udc_start = dwc3_gadget_start, 165472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .udc_stop = dwc3_gadget_stop, 165572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi}; 165672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 165772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 165872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 16596a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbistatic int dwc3_gadget_init_hw_endpoints(struct dwc3 *dwc, 16606a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi u8 num, u32 direction) 166172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 166272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 16636a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi u8 i; 166472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 16656a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi for (i = 0; i < num; i++) { 16666a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi u8 epnum = (i << 1) | (!!direction); 166772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 166872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = kzalloc(sizeof(*dep), GFP_KERNEL); 1669734d5a5393ed8eedf70f13c7078cb4a6134f49f2Jingoo Han if (!dep) 167072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -ENOMEM; 167172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 167272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->dwc = dwc; 167372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->number = epnum; 16749aa62ae4292a2450634345d79a7fa1461bf7b39cFelipe Balbi dep->direction = !!direction; 167572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->eps[epnum] = dep; 167672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 167772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi snprintf(dep->name, sizeof(dep->name), "ep%d%s", epnum >> 1, 167872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi (epnum & 1) ? "in" : "out"); 16796a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi 168072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->endpoint.name = dep->name; 168172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1682653df35e6b3c0df875999a9b842327301269f55dFelipe Balbi dev_vdbg(dwc->dev, "initializing %s\n", dep->name); 1683653df35e6b3c0df875999a9b842327301269f55dFelipe Balbi 168472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (epnum == 0 || epnum == 1) { 1685e117e742d310683b410951faeab4b13b6c3c609fRobert Baldyga usb_ep_set_maxpacket_limit(&dep->endpoint, 512); 16866048e4c69d80600baba35856651056860d5d8f5aPratyush Anand dep->endpoint.maxburst = 1; 168772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->endpoint.ops = &dwc3_gadget_ep0_ops; 168872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!epnum) 168972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ep0 = &dep->endpoint; 169072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 169172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 169272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1693e117e742d310683b410951faeab4b13b6c3c609fRobert Baldyga usb_ep_set_maxpacket_limit(&dep->endpoint, 1024); 169412d36c16bde3ee0643d705caa87723de536dbe49Sebastian Andrzej Siewior dep->endpoint.max_streams = 15; 169572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->endpoint.ops = &dwc3_gadget_ep_ops; 169672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_add_tail(&dep->endpoint.ep_list, 169772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi &dwc->gadget.ep_list); 169872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 169972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_alloc_trb_pool(dep); 170025b8ff68bf1d4954d4a9dcb4862c6b6a53cb09e2Felipe Balbi if (ret) 170172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 170272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 170325b8ff68bf1d4954d4a9dcb4862c6b6a53cb09e2Felipe Balbi 170472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi INIT_LIST_HEAD(&dep->request_list); 170572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi INIT_LIST_HEAD(&dep->req_queued); 170672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 170772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 170872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 170972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 171072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 17116a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbistatic int dwc3_gadget_init_endpoints(struct dwc3 *dwc) 17126a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi{ 17136a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi int ret; 17146a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi 17156a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi INIT_LIST_HEAD(&dwc->gadget.ep_list); 17166a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi 17176a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi ret = dwc3_gadget_init_hw_endpoints(dwc, dwc->num_out_eps, 0); 17186a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi if (ret < 0) { 17196a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi dev_vdbg(dwc->dev, "failed to allocate OUT endpoints\n"); 17206a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi return ret; 17216a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi } 17226a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi 17236a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi ret = dwc3_gadget_init_hw_endpoints(dwc, dwc->num_in_eps, 1); 17246a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi if (ret < 0) { 17256a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi dev_vdbg(dwc->dev, "failed to allocate IN endpoints\n"); 17266a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi return ret; 17276a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi } 17286a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi 17296a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi return 0; 17306a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi} 17316a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi 173272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_free_endpoints(struct dwc3 *dwc) 173372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 173472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 173572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 epnum; 173672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 173772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi for (epnum = 0; epnum < DWC3_ENDPOINTS_NUM; epnum++) { 173872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[epnum]; 17396a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi if (!dep) 17406a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi continue; 17415bf8fae33d14cc5c3c53a926f9079f92c8b082b0George Cherian /* 17425bf8fae33d14cc5c3c53a926f9079f92c8b082b0George Cherian * Physical endpoints 0 and 1 are special; they form the 17435bf8fae33d14cc5c3c53a926f9079f92c8b082b0George Cherian * bi-directional USB endpoint 0. 17445bf8fae33d14cc5c3c53a926f9079f92c8b082b0George Cherian * 17455bf8fae33d14cc5c3c53a926f9079f92c8b082b0George Cherian * For those two physical endpoints, we don't allocate a TRB 17465bf8fae33d14cc5c3c53a926f9079f92c8b082b0George Cherian * pool nor do we add them the endpoints list. Due to that, we 17475bf8fae33d14cc5c3c53a926f9079f92c8b082b0George Cherian * shouldn't do these two operations otherwise we would end up 17485bf8fae33d14cc5c3c53a926f9079f92c8b082b0George Cherian * with all sorts of bugs when removing dwc3.ko. 17495bf8fae33d14cc5c3c53a926f9079f92c8b082b0George Cherian */ 17505bf8fae33d14cc5c3c53a926f9079f92c8b082b0George Cherian if (epnum != 0 && epnum != 1) { 17515bf8fae33d14cc5c3c53a926f9079f92c8b082b0George Cherian dwc3_free_trb_pool(dep); 175272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_del(&dep->endpoint.ep_list); 17535bf8fae33d14cc5c3c53a926f9079f92c8b082b0George Cherian } 175472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 175572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi kfree(dep); 175672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 175772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 175872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 175972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 1760e5caff6831d00d96b4618de939312570527ad54aFelipe Balbi 1761e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anandstatic int __dwc3_cleanup_done_trbs(struct dwc3 *dwc, struct dwc3_ep *dep, 1762e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand struct dwc3_request *req, struct dwc3_trb *trb, 176372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct dwc3_event_depevt *event, int status) 176472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 176572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned int count; 176672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned int s_pkt = 0; 1767d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand unsigned int trb_status; 176872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 17692c4cbe6e5a9c71408b496e00a78ea9284e98af16Felipe Balbi trace_dwc3_complete_trb(dep, trb); 17702c4cbe6e5a9c71408b496e00a78ea9284e98af16Felipe Balbi 1771e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if ((trb->ctrl & DWC3_TRB_CTRL_HWO) && status != -ESHUTDOWN) 1772e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand /* 1773e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * We continue despite the error. There is not much we 1774e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * can do. If we don't clean it up we loop forever. If 1775e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * we skip the TRB then it gets overwritten after a 1776e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * while since we use them in a ring buffer. A BUG() 1777e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * would help. Lets hope that if this occurs, someone 1778e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * fixes the root cause instead of looking away :) 1779e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand */ 1780e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand dev_err(dwc->dev, "%s's TRB (%p) still owned by HW\n", 1781e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand dep->name, trb); 1782e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand count = trb->size & DWC3_TRB_SIZE_MASK; 1783e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand 1784e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if (dep->direction) { 1785e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if (count) { 1786e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand trb_status = DWC3_TRB_SIZE_TRBSTS(trb->size); 1787e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if (trb_status == DWC3_TRBSTS_MISSED_ISOC) { 1788e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand dev_dbg(dwc->dev, "incomplete IN transfer %s\n", 1789e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand dep->name); 1790e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand /* 1791e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * If missed isoc occurred and there is 1792e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * no request queued then issue END 1793e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * TRANSFER, so that core generates 1794e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * next xfernotready and we will issue 1795e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * a fresh START TRANSFER. 1796e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * If there are still queued request 1797e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * then wait, do not issue either END 1798e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * or UPDATE TRANSFER, just attach next 1799e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * request in request_list during 1800e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * giveback.If any future queued request 1801e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * is successfully transferred then we 1802e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * will issue UPDATE TRANSFER for all 1803e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * request in the request_list. 1804e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand */ 1805e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand dep->flags |= DWC3_EP_MISSED_ISOC; 1806e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand } else { 1807e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand dev_err(dwc->dev, "incomplete IN transfer %s\n", 1808e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand dep->name); 1809e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand status = -ECONNRESET; 1810e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand } 1811e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand } else { 1812e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand dep->flags &= ~DWC3_EP_MISSED_ISOC; 1813e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand } 1814e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand } else { 1815e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if (count && (event->status & DEPEVT_STATUS_SHORT)) 1816e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand s_pkt = 1; 1817e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand } 1818e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand 1819e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand /* 1820e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * We assume here we will always receive the entire data block 1821e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * which we should receive. Meaning, if we program RX to 1822e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * receive 4K but we receive only 2K, we assume that's all we 1823e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * should receive and we simply bounce the request back to the 1824e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * gadget driver for further processing. 1825e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand */ 1826e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand req->request.actual += req->request.length - count; 1827e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if (s_pkt) 1828e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand return 1; 1829e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if ((event->status & DEPEVT_STATUS_LST) && 1830e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand (trb->ctrl & (DWC3_TRB_CTRL_LST | 1831e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand DWC3_TRB_CTRL_HWO))) 1832e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand return 1; 1833e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if ((event->status & DEPEVT_STATUS_IOC) && 1834e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand (trb->ctrl & DWC3_TRB_CTRL_IOC)) 1835e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand return 1; 1836e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand return 0; 1837e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand} 1838e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand 1839e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anandstatic int dwc3_cleanup_done_reqs(struct dwc3 *dwc, struct dwc3_ep *dep, 1840e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand const struct dwc3_event_depevt *event, int status) 1841e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand{ 1842e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand struct dwc3_request *req; 1843e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand struct dwc3_trb *trb; 1844e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand unsigned int slot; 1845e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand unsigned int i; 1846e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand int ret; 1847e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand 184872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi do { 184972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req = next_request(&dep->req_queued); 1850d39ee7be2aaf0a53d7b5f43c13571bac95f7cc0cSebastian Andrzej Siewior if (!req) { 1851d39ee7be2aaf0a53d7b5f43c13571bac95f7cc0cSebastian Andrzej Siewior WARN_ON_ONCE(1); 1852d39ee7be2aaf0a53d7b5f43c13571bac95f7cc0cSebastian Andrzej Siewior return 1; 1853d39ee7be2aaf0a53d7b5f43c13571bac95f7cc0cSebastian Andrzej Siewior } 1854e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand i = 0; 1855e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand do { 1856e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand slot = req->start_slot + i; 1857e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if ((slot == DWC3_TRB_NUM - 1) && 1858e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand usb_endpoint_xfer_isoc(dep->endpoint.desc)) 1859e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand slot++; 1860e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand slot %= DWC3_TRB_NUM; 1861e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand trb = &dep->trb_pool[slot]; 186272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1863e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand ret = __dwc3_cleanup_done_trbs(dwc, dep, req, trb, 1864e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand event, status); 1865e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if (ret) 1866e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand break; 1867e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand }while (++i < req->request.num_mapped_sgs); 186872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 186972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_giveback(dep, req, status); 1870e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand 1871e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if (ret) 187272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 187372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } while (1); 187472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1875cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand if (usb_endpoint_xfer_isoc(dep->endpoint.desc) && 1876cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand list_empty(&dep->req_queued)) { 1877cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand if (list_empty(&dep->request_list)) { 1878cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand /* 1879cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand * If there is no entry in request list then do 1880cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand * not issue END TRANSFER now. Just set PENDING 1881cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand * flag, so that END TRANSFER is issued when an 1882cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand * entry is added into request list. 1883cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand */ 1884cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand dep->flags = DWC3_EP_PENDING_REQUEST; 1885cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand } else { 1886b992e6813e257269e9599ca07be8bd52df784bf5Paul Zimmerman dwc3_stop_active_transfer(dwc, dep->number, true); 1887cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand dep->flags = DWC3_EP_ENABLED; 1888cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand } 18897efea86c2868b8fd9df65e589e33aebe498ce21dPratyush Anand return 1; 18907efea86c2868b8fd9df65e589e33aebe498ce21dPratyush Anand } 18917efea86c2868b8fd9df65e589e33aebe498ce21dPratyush Anand 189272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 1; 189372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 189472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 189572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_endpoint_transfer_complete(struct dwc3 *dwc, 1896029d97ff543219762685805e15d71f7005ad7c5eJingoo Han struct dwc3_ep *dep, const struct dwc3_event_depevt *event) 189772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 189872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned status = 0; 189972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int clean_busy; 190072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 190172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (event->status & DEPEVT_STATUS_BUSERR) 190272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi status = -ECONNRESET; 190372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 19041d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman clean_busy = dwc3_cleanup_done_reqs(dwc, dep, event, status); 1905c2df85ca31645ed3c68c56bd30a3673e034224f1Paul Zimmerman if (clean_busy) 190672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags &= ~DWC3_EP_BUSY; 1907fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1908fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi /* 1909fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * WORKAROUND: This is the 2nd half of U1/U2 -> U0 workaround. 1910fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * See dwc3_gadget_linksts_change_interrupt() for 1st half. 1911fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi */ 1912fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi if (dwc->revision < DWC3_REVISION_183A) { 1913fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi u32 reg; 1914fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi int i; 1915fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1916fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi for (i = 0; i < DWC3_ENDPOINTS_NUM; i++) { 1917348e026fafe2501281db5fb7fed599b337cad358Moiz Sonasath dep = dwc->eps[i]; 1918fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1919fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) 1920fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi continue; 1921fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1922fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi if (!list_empty(&dep->req_queued)) 1923fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi return; 1924fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi } 1925fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1926fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 1927fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi reg |= dwc->u1u2; 1928fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 1929fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1930fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi dwc->u1u2 = 0; 1931fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi } 193272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 193372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 193472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_endpoint_interrupt(struct dwc3 *dwc, 193572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct dwc3_event_depevt *event) 193672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 193772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 193872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 epnum = event->endpoint_number; 193972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 194072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[epnum]; 194172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 19423336abb5b608300550136ddab7a7101b30d45fa7Felipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) 19433336abb5b608300550136ddab7a7101b30d45fa7Felipe Balbi return; 19443336abb5b608300550136ddab7a7101b30d45fa7Felipe Balbi 194572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (epnum == 0 || epnum == 1) { 194672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_ep0_interrupt(dwc, event); 194772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 194872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 194972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 195072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (event->endpoint_event) { 195172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPEVT_XFERCOMPLETE: 1952b4996a8631e80a2aaddb5c487ff6b9ad37315f70Felipe Balbi dep->resource_index = 0; 1953c2df85ca31645ed3c68c56bd30a3673e034224f1Paul Zimmerman 195416e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if (usb_endpoint_xfer_isoc(dep->endpoint.desc)) { 195572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "%s is an Isochronous endpoint\n", 195672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 195772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 195872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 195972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1960029d97ff543219762685805e15d71f7005ad7c5eJingoo Han dwc3_endpoint_transfer_complete(dwc, dep, event); 196172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 196272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPEVT_XFERINPROGRESS: 1963029d97ff543219762685805e15d71f7005ad7c5eJingoo Han dwc3_endpoint_transfer_complete(dwc, dep, event); 196472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 196572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPEVT_XFERNOTREADY: 196616e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if (usb_endpoint_xfer_isoc(dep->endpoint.desc)) { 196772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_start_isoc(dwc, dep, event); 196872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 196972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 197072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 197172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s: reason %s\n", 197240aa41fba348bc5bd19ff5bcf2b03d67bb01d1ceFelipe Balbi dep->name, event->status & 197340aa41fba348bc5bd19ff5bcf2b03d67bb01d1ceFelipe Balbi DEPEVT_STATUS_TRANSFER_ACTIVE 197472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ? "Transfer Active" 197572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi : "Transfer Not Active"); 197672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 197772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = __dwc3_gadget_kick_transfer(dep, 0, 1); 197872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!ret || ret == -EBUSY) 197972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 198072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 198172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "%s: failed to kick transfers\n", 198272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 198372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 198472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 198572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 1986879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi case DWC3_DEPEVT_STREAMEVT: 198716e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if (!usb_endpoint_xfer_bulk(dep->endpoint.desc)) { 1988879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dev_err(dwc->dev, "Stream event for non-Bulk %s\n", 1989879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dep->name); 1990879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi return; 1991879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi } 1992879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi 1993879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi switch (event->status) { 1994879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi case DEPEVT_STREAMEVT_FOUND: 1995879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dev_vdbg(dwc->dev, "Stream %d found and started\n", 1996879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi event->parameters); 1997879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi 1998879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi break; 1999879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi case DEPEVT_STREAMEVT_NOTFOUND: 2000879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi /* FALLTHROUGH */ 2001879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi default: 2002879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dev_dbg(dwc->dev, "Couldn't find suitable stream\n"); 2003879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi } 2004879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi break; 200572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPEVT_RXTXFIFOEVT: 200672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "%s FIFO Overrun\n", dep->name); 200772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 200872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPEVT_EPCMDCMPLT: 2009ea53b8828c50b7a5138a8931c41b2671682c86b5Felipe Balbi dev_vdbg(dwc->dev, "Endpoint Command Complete\n"); 201072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 201172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 201272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 201372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 201472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_disconnect_gadget(struct dwc3 *dwc) 201572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 201672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dwc->gadget_driver && dwc->gadget_driver->disconnect) { 201772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock(&dwc->lock); 201872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver->disconnect(&dwc->gadget); 201972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock(&dwc->lock); 202072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 202172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 202272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 2023bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbistatic void dwc3_suspend_gadget(struct dwc3 *dwc) 2024bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi{ 202573a30bfc0d526db899033165db6f95c427e70505Dan Carpenter if (dwc->gadget_driver && dwc->gadget_driver->suspend) { 2026bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi spin_unlock(&dwc->lock); 2027bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi dwc->gadget_driver->suspend(&dwc->gadget); 2028bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi spin_lock(&dwc->lock); 2029bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi } 2030bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi} 2031bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi 2032bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbistatic void dwc3_resume_gadget(struct dwc3 *dwc) 2033bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi{ 203473a30bfc0d526db899033165db6f95c427e70505Dan Carpenter if (dwc->gadget_driver && dwc->gadget_driver->resume) { 2035bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi spin_unlock(&dwc->lock); 2036bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi dwc->gadget_driver->resume(&dwc->gadget); 2037bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi spin_lock(&dwc->lock); 2038bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi } 2039bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi} 2040bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi 2041b992e6813e257269e9599ca07be8bd52df784bf5Paul Zimmermanstatic void dwc3_stop_active_transfer(struct dwc3 *dwc, u32 epnum, bool force) 204272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 204372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 204472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 204572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 cmd; 204672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 204772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 204872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[epnum]; 204972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 2050b4996a8631e80a2aaddb5c487ff6b9ad37315f70Felipe Balbi if (!dep->resource_index) 20513daf74d78dfcd552445c35f1b82a271ca305ceb9Pratyush Anand return; 20523daf74d78dfcd552445c35f1b82a271ca305ceb9Pratyush Anand 205357911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand /* 205457911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * NOTICE: We are violating what the Databook says about the 205557911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * EndTransfer command. Ideally we would _always_ wait for the 205657911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * EndTransfer Command Completion IRQ, but that's causing too 205757911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * much trouble synchronizing between us and gadget driver. 205857911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * 205957911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * We have discussed this with the IP Provider and it was 206057911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * suggested to giveback all requests here, but give HW some 206157911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * extra time to synchronize with the interconnect. We're using 206257911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * an arbitraty 100us delay for that. 206357911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * 206457911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * Note also that a similar handling was tested by Synopsys 206557911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * (thanks a lot Paul) and nothing bad has come out of it. 206657911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * In short, what we're doing is: 206757911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * 206857911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * - Issue EndTransfer WITH CMDIOC bit set 206957911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * - Wait 100us 207057911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand */ 207157911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand 20723daf74d78dfcd552445c35f1b82a271ca305ceb9Pratyush Anand cmd = DWC3_DEPCMD_ENDTRANSFER; 2073b992e6813e257269e9599ca07be8bd52df784bf5Paul Zimmerman cmd |= force ? DWC3_DEPCMD_HIPRI_FORCERM : 0; 2074b992e6813e257269e9599ca07be8bd52df784bf5Paul Zimmerman cmd |= DWC3_DEPCMD_CMDIOC; 2075b4996a8631e80a2aaddb5c487ff6b9ad37315f70Felipe Balbi cmd |= DWC3_DEPCMD_PARAM(dep->resource_index); 20763daf74d78dfcd552445c35f1b82a271ca305ceb9Pratyush Anand memset(¶ms, 0, sizeof(params)); 20773daf74d78dfcd552445c35f1b82a271ca305ceb9Pratyush Anand ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, cmd, ¶ms); 20783daf74d78dfcd552445c35f1b82a271ca305ceb9Pratyush Anand WARN_ON_ONCE(ret); 2079b4996a8631e80a2aaddb5c487ff6b9ad37315f70Felipe Balbi dep->resource_index = 0; 2080041d81f493d90c940ec41f0ec98bc7c4f2fba431Felipe Balbi dep->flags &= ~DWC3_EP_BUSY; 208157911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand udelay(100); 208272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 208372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 208472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_stop_active_transfers(struct dwc3 *dwc) 208572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 208672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 epnum; 208772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 208872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi for (epnum = 2; epnum < DWC3_ENDPOINTS_NUM; epnum++) { 208972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 209072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 209172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[epnum]; 20926a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi if (!dep) 20936a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi continue; 20946a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi 209572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) 209672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi continue; 209772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 2098624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior dwc3_remove_requests(dwc, dep); 209972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 210072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 210172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 210272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_clear_stall_all_ep(struct dwc3 *dwc) 210372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 210472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 epnum; 210572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 210672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi for (epnum = 1; epnum < DWC3_ENDPOINTS_NUM; epnum++) { 210772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 210872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 210972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 211072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 211172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[epnum]; 21126a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi if (!dep) 21136a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi continue; 211472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 211572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(dep->flags & DWC3_EP_STALL)) 211672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi continue; 211772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 211872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags &= ~DWC3_EP_STALL; 211972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 212072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0, sizeof(params)); 212172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, 212272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEPCMD_CLEARSTALL, ¶ms); 212372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi WARN_ON_ONCE(ret); 212472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 212572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 212672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 212772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_disconnect_interrupt(struct dwc3 *dwc) 212872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 2129c4430a26948b84c0d820e83f8c640229f960d3b6Felipe Balbi int reg; 2130c4430a26948b84c0d820e83f8c640229f960d3b6Felipe Balbi 213172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 213272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DCTL_INITU1ENA; 213372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 213472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 213572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DCTL_INITU2ENA; 213672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 213772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 213872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_disconnect_gadget(dwc); 2139b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman dwc->start_config_issued = false; 214072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 214172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_UNKNOWN; 2142df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi dwc->setup_packet_pending = false; 214372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 214472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 214572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_reset_interrupt(struct dwc3 *dwc) 214672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 214772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 214872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 2149df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi /* 2150df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * WORKAROUND: DWC3 revisions <1.88a have an issue which 2151df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * would cause a missing Disconnect Event if there's a 2152df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * pending Setup Packet in the FIFO. 2153df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * 2154df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * There's no suggested workaround on the official Bug 2155df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * report, which states that "unless the driver/application 2156df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * is doing any special handling of a disconnect event, 2157df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * there is no functional issue". 2158df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * 2159df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * Unfortunately, it turns out that we _do_ some special 2160df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * handling of a disconnect event, namely complete all 2161df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * pending transfers, notify gadget driver of the 2162df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * disconnection, and so on. 2163df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * 2164df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * Our suggested workaround is to follow the Disconnect 2165df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * Event steps here, instead, based on a setup_packet_pending 2166df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * flag. Such flag gets set whenever we have a XferNotReady 2167df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * event on EP0 and gets cleared on XferComplete for the 2168df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * same endpoint. 2169df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * 2170df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * Refers to: 2171df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * 2172df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * STAR#9000466709: RTL: Device : Disconnect event not 2173df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * generated if setup packet pending in FIFO 2174df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi */ 2175df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi if (dwc->revision < DWC3_REVISION_188A) { 2176df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi if (dwc->setup_packet_pending) 2177df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi dwc3_gadget_disconnect_interrupt(dwc); 2178df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi } 2179df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi 2180961906edb549c95f4cc33e4f3dbfd0fcc364954dFelipe Balbi /* after reset -> Default State */ 218114cd592f72ea1ce1a25d7a576a5ed6aa761456bcFelipe Balbi usb_gadget_set_state(&dwc->gadget, USB_STATE_DEFAULT); 2182961906edb549c95f4cc33e4f3dbfd0fcc364954dFelipe Balbi 218372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dwc->gadget.speed != USB_SPEED_UNKNOWN) 218472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_disconnect_gadget(dwc); 218572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 218672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 218772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DCTL_TSTCTRL_MASK; 218872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 21893b637367ae40b6d3c20e30cb0cdd059e67bbf848Gerard Cauvy dwc->test_mode = false; 219072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 219172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_stop_active_transfers(dwc); 219272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_clear_stall_all_ep(dwc); 2193b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman dwc->start_config_issued = false; 219472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 219572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* Reset device address to zero */ 219672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCFG); 219772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~(DWC3_DCFG_DEVADDR_MASK); 219872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCFG, reg); 219972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 220072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 220172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_update_ram_clk_sel(struct dwc3 *dwc, u32 speed) 220272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 220372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 220472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 usb30_clock = DWC3_GCTL_CLK_BUS; 220572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 220672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 220772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We change the clock only at SS but I dunno why I would want to do 220872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * this. Maybe it becomes part of the power saving plan. 220972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 221072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 221172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (speed != DWC3_DSTS_SUPERSPEED) 221272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 221372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 221472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 221572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * RAMClkSel is reset to 0 after USB reset, so it must be reprogrammed 221672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * each time on Connect Done. 221772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 221872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!usb30_clock) 221972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 222072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 222172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_GCTL); 222272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg |= DWC3_GCTL_RAMCLKSEL(usb30_clock); 222372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_GCTL, reg); 222472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 222572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 222672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_conndone_interrupt(struct dwc3 *dwc) 222772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 222872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 222972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 223072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 223172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 speed; 223272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 223372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 223472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi speed = reg & DWC3_DSTS_CONNECTSPD; 223572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->speed = speed; 223672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 223772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_update_ram_clk_sel(dwc, speed); 223872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 223972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (speed) { 224072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DCFG_SUPERSPEED: 224105870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi /* 224205870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * WORKAROUND: DWC3 revisions <1.90a have an issue which 224305870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * would cause a missing USB3 Reset event. 224405870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * 224505870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * In such situations, we should force a USB3 Reset 224605870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * event by calling our dwc3_gadget_reset_interrupt() 224705870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * routine. 224805870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * 224905870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * Refers to: 225005870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * 225105870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * STAR#9000483510: RTL: SS : USB3 reset event may 225205870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * not be generated always when the link enters poll 225305870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi */ 225405870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi if (dwc->revision < DWC3_REVISION_190A) 225505870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi dwc3_gadget_reset_interrupt(dwc); 225605870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi 225772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(512); 225872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ep0->maxpacket = 512; 225972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_SUPER; 226072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 226172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DCFG_HIGHSPEED: 226272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(64); 226372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ep0->maxpacket = 64; 226472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_HIGH; 226572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 226672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DCFG_FULLSPEED2: 226772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DCFG_FULLSPEED1: 226872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(64); 226972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ep0->maxpacket = 64; 227072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_FULL; 227172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 227272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DCFG_LOWSPEED: 227372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(8); 227472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ep0->maxpacket = 8; 227572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_LOW; 227672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 227772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 227872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 22792b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand /* Enable USB2 LPM Capability */ 22802b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand 22812b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand if ((dwc->revision > DWC3_REVISION_194A) 22822b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand && (speed != DWC3_DCFG_SUPERSPEED)) { 22832b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand reg = dwc3_readl(dwc->regs, DWC3_DCFG); 22842b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand reg |= DWC3_DCFG_LPM_CAP; 22852b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand dwc3_writel(dwc->regs, DWC3_DCFG, reg); 22862b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand 22872b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand reg = dwc3_readl(dwc->regs, DWC3_DCTL); 22882b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand reg &= ~(DWC3_DCTL_HIRD_THRES_MASK | DWC3_DCTL_L1_HIBER_EN); 22892b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand 22901a947746dbe1486d0e305ab512ddf085b7874cb3Felipe Balbi /* 22911a947746dbe1486d0e305ab512ddf085b7874cb3Felipe Balbi * TODO: This should be configurable. For now using 22921a947746dbe1486d0e305ab512ddf085b7874cb3Felipe Balbi * maximum allowed HIRD threshold value of 0b1100 22931a947746dbe1486d0e305ab512ddf085b7874cb3Felipe Balbi */ 22941a947746dbe1486d0e305ab512ddf085b7874cb3Felipe Balbi reg |= DWC3_DCTL_HIRD_THRES(12); 22952b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand 22962b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand dwc3_writel(dwc->regs, DWC3_DCTL, reg); 2297356363bf6b2fc4785d874ef87ed2fad4b8543490Felipe Balbi } else { 2298356363bf6b2fc4785d874ef87ed2fad4b8543490Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 2299356363bf6b2fc4785d874ef87ed2fad4b8543490Felipe Balbi reg &= ~DWC3_DCTL_HIRD_THRES_MASK; 2300356363bf6b2fc4785d874ef87ed2fad4b8543490Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 23012b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand } 23022b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand 230372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[0]; 2304265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL, true, 2305265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman false); 230672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 230772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to enable %s\n", dep->name); 230872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 230972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 231072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 231172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[1]; 2312265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL, true, 2313265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman false); 231472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 231572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to enable %s\n", dep->name); 231672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 231772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 231872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 231972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 232072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Configure PHY via GUSB3PIPECTLn if required. 232172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 232272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Update GTXFIFOSIZn 232372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 232472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * In both cases reset values should be sufficient. 232572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 232672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 232772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 232872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_wakeup_interrupt(struct dwc3 *dwc) 232972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 233072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 233172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * TODO take core out of low power mode when that's 233272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * implemented. 233372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 233472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 233572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver->resume(&dwc->gadget); 233672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 233772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 233872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_linksts_change_interrupt(struct dwc3 *dwc, 233972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned int evtinfo) 234072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 2341fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi enum dwc3_link_state next = evtinfo & DWC3_LINK_STATE_MASK; 23420b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi unsigned int pwropt; 23430b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi 23440b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi /* 23450b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi * WORKAROUND: DWC3 < 2.50a have an issue when configured without 23460b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi * Hibernation mode enabled which would show up when device detects 23470b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi * host-initiated U3 exit. 23480b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi * 23490b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi * In that case, device will generate a Link State Change Interrupt 23500b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi * from U3 to RESUME which is only necessary if Hibernation is 23510b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi * configured in. 23520b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi * 23530b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi * There are no functional changes due to such spurious event and we 23540b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi * just need to ignore it. 23550b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi * 23560b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi * Refers to: 23570b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi * 23580b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi * STAR#9000570034 RTL: SS Resume event generated in non-Hibernation 23590b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi * operational mode 23600b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi */ 23610b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi pwropt = DWC3_GHWPARAMS1_EN_PWROPT(dwc->hwparams.hwparams1); 23620b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi if ((dwc->revision < DWC3_REVISION_250A) && 23630b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi (pwropt != DWC3_GHWPARAMS1_EN_PWROPT_HIB)) { 23640b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi if ((dwc->link_state == DWC3_LINK_STATE_U3) && 23650b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi (next == DWC3_LINK_STATE_RESUME)) { 23660b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi dev_vdbg(dwc->dev, "ignoring transition U3 -> Resume\n"); 23670b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi return; 23680b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi } 23690b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi } 2370fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 2371fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi /* 2372fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * WORKAROUND: DWC3 Revisions <1.83a have an issue which, depending 2373fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * on the link partner, the USB session might do multiple entry/exit 2374fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * of low power states before a transfer takes place. 2375fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * 2376fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * Due to this problem, we might experience lower throughput. The 2377fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * suggested workaround is to disable DCTL[12:9] bits if we're 2378fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * transitioning from U1/U2 to U0 and enable those bits again 2379fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * after a transfer completes and there are no pending transfers 2380fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * on any of the enabled endpoints. 2381fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * 2382fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * This is the first half of that workaround. 2383fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * 2384fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * Refers to: 2385fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * 2386fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * STAR#9000446952: RTL: Device SS : if U1/U2 ->U0 takes >128us 2387fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * core send LGO_Ux entering U0 2388fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi */ 2389fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi if (dwc->revision < DWC3_REVISION_183A) { 2390fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi if (next == DWC3_LINK_STATE_U0) { 2391fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi u32 u1u2; 2392fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi u32 reg; 2393fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 2394fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi switch (dwc->link_state) { 2395fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi case DWC3_LINK_STATE_U1: 2396fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi case DWC3_LINK_STATE_U2: 2397fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 2398fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi u1u2 = reg & (DWC3_DCTL_INITU2ENA 2399fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi | DWC3_DCTL_ACCEPTU2ENA 2400fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi | DWC3_DCTL_INITU1ENA 2401fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi | DWC3_DCTL_ACCEPTU1ENA); 2402fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 2403fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi if (!dwc->u1u2) 2404fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi dwc->u1u2 = reg & u1u2; 2405fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 2406fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi reg &= ~u1u2; 2407fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 2408fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 2409fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi break; 2410fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi default: 2411fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi /* do nothing */ 2412fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi break; 2413fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi } 2414fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi } 2415fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi } 2416fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 2417bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi switch (next) { 2418bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi case DWC3_LINK_STATE_U1: 2419bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi if (dwc->speed == USB_SPEED_SUPER) 2420bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi dwc3_suspend_gadget(dwc); 2421bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi break; 2422bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi case DWC3_LINK_STATE_U2: 2423bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi case DWC3_LINK_STATE_U3: 2424bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi dwc3_suspend_gadget(dwc); 2425bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi break; 2426bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi case DWC3_LINK_STATE_RESUME: 2427bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi dwc3_resume_gadget(dwc); 2428bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi break; 2429bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi default: 2430bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi /* do nothing */ 2431bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi break; 2432bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi } 2433bc5ba2e0b829c9397f96df1191c7d2319ebc36d9Felipe Balbi 2434e57ebc1db6ef796124b69abca044a373b9110a47Felipe Balbi dwc->link_state = next; 243572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 243672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 2437e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbistatic void dwc3_gadget_hibernation_interrupt(struct dwc3 *dwc, 2438e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi unsigned int evtinfo) 2439e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi{ 2440e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi unsigned int is_ss = evtinfo & BIT(4); 2441e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi 2442e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi /** 2443e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi * WORKAROUND: DWC3 revison 2.20a with hibernation support 2444e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi * have a known issue which can cause USB CV TD.9.23 to fail 2445e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi * randomly. 2446e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi * 2447e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi * Because of this issue, core could generate bogus hibernation 2448e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi * events which SW needs to ignore. 2449e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi * 2450e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi * Refers to: 2451e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi * 2452e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi * STAR#9000546576: Device Mode Hibernation: Issue in USB 2.0 2453e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi * Device Fallback from SuperSpeed 2454e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi */ 2455e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi if (is_ss ^ (dwc->speed == USB_SPEED_SUPER)) 2456e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi return; 2457e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi 2458e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi /* enter hibernation here */ 2459e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi} 2460e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi 246172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_interrupt(struct dwc3 *dwc, 246272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct dwc3_event_devt *event) 246372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 246472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (event->type) { 246572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_DISCONNECT: 246672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_disconnect_interrupt(dwc); 246772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 246872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_RESET: 246972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_reset_interrupt(dwc); 247072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 247172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_CONNECT_DONE: 247272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_conndone_interrupt(dwc); 247372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 247472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_WAKEUP: 247572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_wakeup_interrupt(dwc); 247672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 2477e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi case DWC3_DEVICE_EVENT_HIBER_REQ: 2478e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi if (dev_WARN_ONCE(dwc->dev, !dwc->has_hibernation, 2479e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi "unexpected hibernation event\n")) 2480e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi break; 2481e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi 2482e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi dwc3_gadget_hibernation_interrupt(dwc, event->event_info); 2483e1dadd3b0f277e59847d6b7de86ff67306bee4b1Felipe Balbi break; 248472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_LINK_STATUS_CHANGE: 248572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_linksts_change_interrupt(dwc, event->event_info); 248672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 248772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_EOPF: 248872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "End of Periodic Frame\n"); 248972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 249072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_SOF: 249172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "Start of Periodic Frame\n"); 249272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 249372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_ERRATIC_ERROR: 249472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "Erratic Error\n"); 249572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 249672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_CMD_CMPL: 249772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "Command Complete\n"); 249872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 249972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_OVERFLOW: 250072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "Overflow\n"); 250172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 250272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 250372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "UNKNOWN IRQ %d\n", event->type); 250472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 250572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 250672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 250772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_process_event_entry(struct dwc3 *dwc, 250872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const union dwc3_event *event) 250972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 25102c4cbe6e5a9c71408b496e00a78ea9284e98af16Felipe Balbi trace_dwc3_event(event->raw); 25112c4cbe6e5a9c71408b496e00a78ea9284e98af16Felipe Balbi 251272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* Endpoint IRQ, handle it and return early */ 251372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (event->type.is_devspec == 0) { 251472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* depevt */ 251572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return dwc3_endpoint_interrupt(dwc, &event->depevt); 251672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 251772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 251872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (event->type.type) { 251972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_EVENT_TYPE_DEV: 252072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_interrupt(dwc, &event->devt); 252172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 252272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* REVISIT what to do with Carkit and I2C events ? */ 252372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 252472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "UNKNOWN IRQ type %d\n", event->raw); 252572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 252672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 252772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 2528f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbistatic irqreturn_t dwc3_process_event_buf(struct dwc3 *dwc, u32 buf) 2529b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi{ 2530f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi struct dwc3_event_buffer *evt; 2531b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi irqreturn_t ret = IRQ_NONE; 2532f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi int left; 2533e8adfc30ff9282a728fd8b666b6418308164c415Felipe Balbi u32 reg; 2534b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi 2535f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi evt = dwc->ev_buffs[buf]; 2536f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi left = evt->count; 2537b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi 2538f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi if (!(evt->flags & DWC3_EVENT_PENDING)) 2539f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi return IRQ_NONE; 2540b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi 2541f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi while (left > 0) { 2542f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi union dwc3_event event; 2543b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi 2544f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi event.raw = *(u32 *) (evt->buf + evt->lpos); 2545b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi 2546f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi dwc3_process_event_entry(dwc, &event); 2547b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi 2548f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi /* 2549f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi * FIXME we wrap around correctly to the next entry as 2550f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi * almost all entries are 4 bytes in size. There is one 2551f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi * entry which has 12 bytes which is a regular entry 2552f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi * followed by 8 bytes data. ATM I don't know how 2553f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi * things are organized if we get next to the a 2554f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi * boundary so I worry about that once we try to handle 2555f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi * that. 2556f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi */ 2557f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi evt->lpos = (evt->lpos + 4) % DWC3_EVENT_BUFFERS_SIZE; 2558f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi left -= 4; 2559b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi 2560f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi dwc3_writel(dwc->regs, DWC3_GEVNTCOUNT(buf), 4); 2561f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi } 2562b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi 2563f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi evt->count = 0; 2564f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi evt->flags &= ~DWC3_EVENT_PENDING; 2565f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi ret = IRQ_HANDLED; 2566b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi 2567f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi /* Unmask interrupt */ 2568f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi reg = dwc3_readl(dwc->regs, DWC3_GEVNTSIZ(buf)); 2569f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi reg &= ~DWC3_GEVNTSIZ_INTMASK; 2570f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi dwc3_writel(dwc->regs, DWC3_GEVNTSIZ(buf), reg); 2571b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi 2572f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi return ret; 2573f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi} 2574e8adfc30ff9282a728fd8b666b6418308164c415Felipe Balbi 2575f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbistatic irqreturn_t dwc3_thread_interrupt(int irq, void *_dwc) 2576f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi{ 2577f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi struct dwc3 *dwc = _dwc; 2578f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi unsigned long flags; 2579f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi irqreturn_t ret = IRQ_NONE; 2580f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi int i; 2581f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi 2582f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi spin_lock_irqsave(&dwc->lock, flags); 2583f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi 2584f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi for (i = 0; i < dwc->num_event_buffers; i++) 2585f42f2447d66233a5bf86e8631e4eb4e863b2ff0bFelipe Balbi ret |= dwc3_process_event_buf(dwc, i); 2586b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi 2587b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 2588b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi 2589b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi return ret; 2590b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi} 2591b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi 25927f97aa9865800766e570d0e1be772a034dd30388Felipe Balbistatic irqreturn_t dwc3_check_event_buf(struct dwc3 *dwc, u32 buf) 259372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 259472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_event_buffer *evt; 259572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 count; 2596e8adfc30ff9282a728fd8b666b6418308164c415Felipe Balbi u32 reg; 259772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 2598b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi evt = dwc->ev_buffs[buf]; 2599b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi 260072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi count = dwc3_readl(dwc->regs, DWC3_GEVNTCOUNT(buf)); 260172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi count &= DWC3_GEVNTCOUNT_MASK; 260272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!count) 260372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return IRQ_NONE; 260472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 2605b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi evt->count = count; 2606b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi evt->flags |= DWC3_EVENT_PENDING; 260772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 2608e8adfc30ff9282a728fd8b666b6418308164c415Felipe Balbi /* Mask interrupt */ 2609e8adfc30ff9282a728fd8b666b6418308164c415Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_GEVNTSIZ(buf)); 2610e8adfc30ff9282a728fd8b666b6418308164c415Felipe Balbi reg |= DWC3_GEVNTSIZ_INTMASK; 2611e8adfc30ff9282a728fd8b666b6418308164c415Felipe Balbi dwc3_writel(dwc->regs, DWC3_GEVNTSIZ(buf), reg); 2612e8adfc30ff9282a728fd8b666b6418308164c415Felipe Balbi 2613b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi return IRQ_WAKE_THREAD; 261472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 261572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 261672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic irqreturn_t dwc3_interrupt(int irq, void *_dwc) 261772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 261872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = _dwc; 261972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int i; 262072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi irqreturn_t ret = IRQ_NONE; 262172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 262272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock(&dwc->lock); 262372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 26249f622b2a407d8b34a5a7f5b4abd8b29b25cf4f32Felipe Balbi for (i = 0; i < dwc->num_event_buffers; i++) { 262572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi irqreturn_t status; 262672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 26277f97aa9865800766e570d0e1be772a034dd30388Felipe Balbi status = dwc3_check_event_buf(dwc, i); 2628b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi if (status == IRQ_WAKE_THREAD) 262972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = status; 263072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 263172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 263272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock(&dwc->lock); 263372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 263472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 263572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 263672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 263772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/** 263872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * dwc3_gadget_init - Initializes gadget related registers 26391d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * @dwc: pointer to our controller context structure 264072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 264172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Returns 0 on success otherwise negative errno. 264272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 264341ac7b3ab7fe1d6175839947a877fdf95cbd2211Bill Pembertonint dwc3_gadget_init(struct dwc3 *dwc) 264472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 264572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 264672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 264772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ctrl_req = dma_alloc_coherent(dwc->dev, sizeof(*dwc->ctrl_req), 264872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi &dwc->ctrl_req_addr, GFP_KERNEL); 264972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dwc->ctrl_req) { 265072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to allocate ctrl request\n"); 265172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -ENOMEM; 265272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto err0; 265372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 265472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 265572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ep0_trb = dma_alloc_coherent(dwc->dev, sizeof(*dwc->ep0_trb), 265672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi &dwc->ep0_trb_addr, GFP_KERNEL); 265772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dwc->ep0_trb) { 265872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to allocate ep0 trb\n"); 265972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -ENOMEM; 266072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto err1; 266172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 266272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 26633ef35fafdc87b72851f7785dc5331a0f4eb1b3ceFelipe Balbi dwc->setup_buf = kzalloc(DWC3_EP0_BOUNCE_SIZE, GFP_KERNEL); 266472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dwc->setup_buf) { 266572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -ENOMEM; 266672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto err2; 266772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 266872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 26695812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi dwc->ep0_bounce = dma_alloc_coherent(dwc->dev, 26703ef35fafdc87b72851f7785dc5331a0f4eb1b3ceFelipe Balbi DWC3_EP0_BOUNCE_SIZE, &dwc->ep0_bounce_addr, 26713ef35fafdc87b72851f7785dc5331a0f4eb1b3ceFelipe Balbi GFP_KERNEL); 26725812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi if (!dwc->ep0_bounce) { 26735812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi dev_err(dwc->dev, "failed to allocate ep0 bounce buffer\n"); 26745812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi ret = -ENOMEM; 26755812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi goto err3; 26765812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi } 26775812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi 267872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ops = &dwc3_gadget_ops; 2679d327ab5b6d660d6fe22b073b743fde1668e593bbMichal Nazarewicz dwc->gadget.max_speed = USB_SPEED_SUPER; 268072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_UNKNOWN; 2681eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dwc->gadget.sg_supported = true; 268272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.name = "dwc3-gadget"; 268372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 268472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 2685a4b9d94b3dc8e65951c1819d37f213b3c6815adcDavid Cohen * Per databook, DWC3 needs buffer size to be aligned to MaxPacketSize 2686a4b9d94b3dc8e65951c1819d37f213b3c6815adcDavid Cohen * on ep out. 2687a4b9d94b3dc8e65951c1819d37f213b3c6815adcDavid Cohen */ 2688a4b9d94b3dc8e65951c1819d37f213b3c6815adcDavid Cohen dwc->gadget.quirk_ep_out_aligned_size = true; 2689a4b9d94b3dc8e65951c1819d37f213b3c6815adcDavid Cohen 2690a4b9d94b3dc8e65951c1819d37f213b3c6815adcDavid Cohen /* 269172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * REVISIT: Here we should clear all pending IRQs to be 269272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * sure we're starting from a well known location. 269372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 269472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 269572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_gadget_init_endpoints(dwc); 269672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 26975812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi goto err4; 269872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 269972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = usb_add_gadget_udc(dwc->dev, &dwc->gadget); 270072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 270172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to register udc\n"); 2702e1f804676a95b9d5caaa3a822d90bc1101595468David Cohen goto err4; 270372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 270472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 270572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 270672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 27075812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbierr4: 2708e1f804676a95b9d5caaa3a822d90bc1101595468David Cohen dwc3_gadget_free_endpoints(dwc); 27093ef35fafdc87b72851f7785dc5331a0f4eb1b3ceFelipe Balbi dma_free_coherent(dwc->dev, DWC3_EP0_BOUNCE_SIZE, 27103ef35fafdc87b72851f7785dc5331a0f4eb1b3ceFelipe Balbi dwc->ep0_bounce, dwc->ep0_bounce_addr); 27115812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi 271272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbierr3: 27130fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi kfree(dwc->setup_buf); 271472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 271572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbierr2: 271672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(*dwc->ep0_trb), 271772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ep0_trb, dwc->ep0_trb_addr); 271872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 271972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbierr1: 272072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(*dwc->ctrl_req), 272172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ctrl_req, dwc->ctrl_req_addr); 272272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 272372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbierr0: 272472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 272572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 272672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 27277415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi/* -------------------------------------------------------------------------- */ 27287415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 272972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbivoid dwc3_gadget_exit(struct dwc3 *dwc) 273072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 273172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi usb_del_gadget_udc(&dwc->gadget); 273272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 273372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_free_endpoints(dwc); 273472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 27353ef35fafdc87b72851f7785dc5331a0f4eb1b3ceFelipe Balbi dma_free_coherent(dwc->dev, DWC3_EP0_BOUNCE_SIZE, 27363ef35fafdc87b72851f7785dc5331a0f4eb1b3ceFelipe Balbi dwc->ep0_bounce, dwc->ep0_bounce_addr); 27375812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi 27380fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi kfree(dwc->setup_buf); 273972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 274072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(*dwc->ep0_trb), 274172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ep0_trb, dwc->ep0_trb_addr); 274272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 274372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(*dwc->ctrl_req), 274472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ctrl_req, dwc->ctrl_req_addr); 274572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 27467415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 27477415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbiint dwc3_gadget_prepare(struct dwc3 *dwc) 27487415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi{ 27497b2a0368bbc9bc4a7936d8587eaff4b8c35b2247Felipe Balbi if (dwc->pullups_connected) { 27507415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi dwc3_gadget_disable_irq(dwc); 27517b2a0368bbc9bc4a7936d8587eaff4b8c35b2247Felipe Balbi dwc3_gadget_run_stop(dwc, true, true); 27527b2a0368bbc9bc4a7936d8587eaff4b8c35b2247Felipe Balbi } 27537415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 27547415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi return 0; 27557415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi} 27567415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 27577415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbivoid dwc3_gadget_complete(struct dwc3 *dwc) 27587415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi{ 27597415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi if (dwc->pullups_connected) { 27607415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi dwc3_gadget_enable_irq(dwc); 27617b2a0368bbc9bc4a7936d8587eaff4b8c35b2247Felipe Balbi dwc3_gadget_run_stop(dwc, true, false); 27627415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi } 27637415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi} 27647415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 27657415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbiint dwc3_gadget_suspend(struct dwc3 *dwc) 27667415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi{ 27677415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi __dwc3_gadget_ep_disable(dwc->eps[0]); 27687415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi __dwc3_gadget_ep_disable(dwc->eps[1]); 27697415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 27707415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi dwc->dcfg = dwc3_readl(dwc->regs, DWC3_DCFG); 27717415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 27727415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi return 0; 27737415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi} 27747415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 27757415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbiint dwc3_gadget_resume(struct dwc3 *dwc) 27767415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi{ 27777415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi struct dwc3_ep *dep; 27787415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi int ret; 27797415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 27807415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi /* Start with SuperSpeed Default */ 27817415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(512); 27827415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 27837415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi dep = dwc->eps[0]; 2784265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL, false, 2785265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman false); 27867415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi if (ret) 27877415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi goto err0; 27887415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 27897415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi dep = dwc->eps[1]; 2790265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL, false, 2791265b70a73aff2a21e74f1fbe7ffaaeb4608adc98Paul Zimmerman false); 27927415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi if (ret) 27937415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi goto err1; 27947415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 27957415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi /* begin to receive SETUP packets */ 27967415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi dwc->ep0state = EP0_SETUP_PHASE; 27977415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi dwc3_ep0_out_start(dwc); 27987415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 27997415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCFG, dwc->dcfg); 28007415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 28017415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi return 0; 28027415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 28037415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbierr1: 28047415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi __dwc3_gadget_ep_disable(dwc->eps[0]); 28057415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 28067415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbierr0: 28077415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi return ret; 28087415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi} 2809