gadget.c revision 5945f789c864d8676b297880cc6961fea4511a7a
172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/** 272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * gadget.c - DesignWare USB3 DRD Controller Gadget Framework Link 372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com 572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Authors: Felipe Balbi <balbi@ti.com>, 772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Sebastian Andrzej Siewior <bigeasy@linutronix.de> 872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 95945f789c864d8676b297880cc6961fea4511a7aFelipe Balbi * This program is free software: you can redistribute it and/or modify 105945f789c864d8676b297880cc6961fea4511a7aFelipe Balbi * it under the terms of the GNU General Public License version 2 of 115945f789c864d8676b297880cc6961fea4511a7aFelipe Balbi * the License as published by the Free Software Foundation. 1272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 135945f789c864d8676b297880cc6961fea4511a7aFelipe Balbi * This program is distributed in the hope that it will be useful, 145945f789c864d8676b297880cc6961fea4511a7aFelipe Balbi * but WITHOUT ANY WARRANTY; without even the implied warranty of 155945f789c864d8676b297880cc6961fea4511a7aFelipe Balbi * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 165945f789c864d8676b297880cc6961fea4511a7aFelipe Balbi * GNU General Public License for more details. 1772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 1872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/kernel.h> 2072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/delay.h> 2172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/slab.h> 2272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/spinlock.h> 2372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/platform_device.h> 2472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/pm_runtime.h> 2572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/interrupt.h> 2672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/io.h> 2772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/list.h> 2872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/dma-mapping.h> 2972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 3072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/usb/ch9.h> 3172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/usb/gadget.h> 3272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 3372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include "core.h" 3472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include "gadget.h" 3572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include "io.h" 3672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 3704a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi/** 3804a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi * dwc3_gadget_set_test_mode - Enables USB2 Test Modes 3904a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi * @dwc: pointer to our context structure 4004a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi * @mode: the mode to set (J, K SE0 NAK, Force Enable) 4104a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi * 4204a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi * Caller should take care of locking. This function will 4304a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi * return 0 on success or -EINVAL if wrong Test Selector 4404a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi * is passed 4504a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi */ 4604a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbiint dwc3_gadget_set_test_mode(struct dwc3 *dwc, int mode) 4704a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi{ 4804a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi u32 reg; 4904a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi 5004a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 5104a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi reg &= ~DWC3_DCTL_TSTCTRL_MASK; 5204a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi 5304a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi switch (mode) { 5404a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi case TEST_J: 5504a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi case TEST_K: 5604a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi case TEST_SE0_NAK: 5704a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi case TEST_PACKET: 5804a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi case TEST_FORCE_EN: 5904a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi reg |= mode << 1; 6004a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi break; 6104a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi default: 6204a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi return -EINVAL; 6304a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi } 6404a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi 6504a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 6604a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi 6704a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi return 0; 6804a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi} 6904a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi 708598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi/** 718598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi * dwc3_gadget_set_link_state - Sets USB Link to a particular State 728598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi * @dwc: pointer to our context structure 738598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi * @state: the state to put link into 748598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi * 758598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi * Caller should take care of locking. This function will 76aee63e3cb6b0396b99c6387a47cb90a7417f3957Paul Zimmerman * return 0 on success or -ETIMEDOUT. 778598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi */ 788598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbiint dwc3_gadget_set_link_state(struct dwc3 *dwc, enum dwc3_link_state state) 798598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi{ 80aee63e3cb6b0396b99c6387a47cb90a7417f3957Paul Zimmerman int retries = 10000; 818598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi u32 reg; 828598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi 83802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman /* 84802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman * Wait until device controller is ready. Only applies to 1.94a and 85802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman * later RTL. 86802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman */ 87802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman if (dwc->revision >= DWC3_REVISION_194A) { 88802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman while (--retries) { 89802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman reg = dwc3_readl(dwc->regs, DWC3_DSTS); 90802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman if (reg & DWC3_DSTS_DCNRD) 91802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman udelay(5); 92802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman else 93802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman break; 94802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman } 95802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman 96802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman if (retries <= 0) 97802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman return -ETIMEDOUT; 98802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman } 99802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman 1008598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 1018598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi reg &= ~DWC3_DCTL_ULSTCHNGREQ_MASK; 1028598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi 1038598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi /* set requested state */ 1048598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi reg |= DWC3_DCTL_ULSTCHNGREQ(state); 1058598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 1068598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi 107802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman /* 108802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman * The following code is racy when called from dwc3_gadget_wakeup, 109802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman * and is not needed, at least on newer versions 110802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman */ 111802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman if (dwc->revision >= DWC3_REVISION_194A) 112802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman return 0; 113802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman 1148598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi /* wait for a change in DSTS */ 115aed430e5139af3e2c251f52db7fc6c5e2ce2b714Paul Zimmerman retries = 10000; 1168598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi while (--retries) { 1178598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 1188598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi 1198598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi if (DWC3_DSTS_USBLNKST(reg) == state) 1208598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi return 0; 1218598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi 122aee63e3cb6b0396b99c6387a47cb90a7417f3957Paul Zimmerman udelay(5); 1238598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi } 1248598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi 1258598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi dev_vdbg(dwc->dev, "link state change request timed out\n"); 1268598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi 1278598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi return -ETIMEDOUT; 1288598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi} 1298598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi 130457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi/** 131457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * dwc3_gadget_resize_tx_fifos - reallocate fifo spaces for current use-case 132457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * @dwc: pointer to our context structure 133457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * 134457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * This function will a best effort FIFO allocation in order 135457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * to improve FIFO usage and throughput, while still allowing 136457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * us to enable as many endpoints as possible. 137457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * 138457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * Keep in mind that this operation will be highly dependent 139457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * on the configured size for RAM1 - which contains TxFifo -, 140457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * the amount of endpoints enabled on coreConsultant tool, and 141457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * the width of the Master Bus. 142457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * 143457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * In the ideal world, we would always be able to satisfy the 144457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * following equation: 145457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * 146457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * ((512 + 2 * MDWIDTH-Bytes) + (Number of IN Endpoints - 1) * \ 147457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * (3 * (1024 + MDWIDTH-Bytes) + MDWIDTH-Bytes)) / MDWIDTH-Bytes 148457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * 149457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * Unfortunately, due to many variables that's not always the case. 150457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi */ 151457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbiint dwc3_gadget_resize_tx_fifos(struct dwc3 *dwc) 152457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi{ 153457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi int last_fifo_depth = 0; 154457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi int ram1_depth; 155457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi int fifo_size; 156457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi int mdwidth; 157457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi int num; 158457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 159457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi if (!dwc->needs_fifo_resize) 160457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi return 0; 161457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 162457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi ram1_depth = DWC3_RAM1_DEPTH(dwc->hwparams.hwparams7); 163457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi mdwidth = DWC3_MDWIDTH(dwc->hwparams.hwparams0); 164457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 165457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi /* MDWIDTH is represented in bits, we need it in bytes */ 166457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi mdwidth >>= 3; 167457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 168457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi /* 169457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * FIXME For now we will only allocate 1 wMaxPacketSize space 170457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * for each enabled endpoint, later patches will come to 171457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * improve this algorithm so that we better use the internal 172457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * FIFO space 173457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi */ 174457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi for (num = 0; num < DWC3_ENDPOINTS_NUM; num++) { 175457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi struct dwc3_ep *dep = dwc->eps[num]; 176457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi int fifo_number = dep->number >> 1; 1772e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi int mult = 1; 178457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi int tmp; 179457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 180457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi if (!(dep->number & 1)) 181457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi continue; 182457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 183457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) 184457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi continue; 185457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 18616e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if (usb_endpoint_xfer_bulk(dep->endpoint.desc) 18716e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz || usb_endpoint_xfer_isoc(dep->endpoint.desc)) 1882e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi mult = 3; 1892e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi 1902e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi /* 1912e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi * REVISIT: the following assumes we will always have enough 1922e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi * space available on the FIFO RAM for all possible use cases. 1932e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi * Make sure that's true somehow and change FIFO allocation 1942e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi * accordingly. 1952e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi * 1962e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi * If we have Bulk or Isochronous endpoints, we want 1972e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi * them to be able to be very, very fast. So we're giving 1982e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi * those endpoints a fifo_size which is enough for 3 full 1992e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi * packets 2002e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi */ 2012e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi tmp = mult * (dep->endpoint.maxpacket + mdwidth); 202457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi tmp += mdwidth; 203457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 204457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi fifo_size = DIV_ROUND_UP(tmp, mdwidth); 2052e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi 206457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi fifo_size |= (last_fifo_depth << 16); 207457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 208457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi dev_vdbg(dwc->dev, "%s: Fifo Addr %04x Size %d\n", 209457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi dep->name, last_fifo_depth, fifo_size & 0xffff); 210457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 211457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi dwc3_writel(dwc->regs, DWC3_GTXFIFOSIZ(fifo_number), 212457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi fifo_size); 213457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 214457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi last_fifo_depth += (fifo_size & 0xffff); 215457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi } 216457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 217457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi return 0; 218457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi} 219457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 22072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbivoid dwc3_gadget_giveback(struct dwc3_ep *dep, struct dwc3_request *req, 22172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int status) 22272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 22372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 224e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand int i; 22572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 22672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (req->queued) { 227e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand i = 0; 228e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand do { 229eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dep->busy_slot++; 230e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand /* 231e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * Skip LINK TRB. We can't use req->trb and check for 232e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * DWC3_TRBCTL_LINK_TRB because it points the TRB we 233e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * just completed (not the LINK TRB). 234e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand */ 235e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if (((dep->busy_slot & DWC3_TRB_MASK) == 236e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand DWC3_TRB_NUM- 1) && 23716e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz usb_endpoint_xfer_isoc(dep->endpoint.desc)) 238e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand dep->busy_slot++; 239e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand } while(++i < req->request.num_mapped_sgs); 240c9fda7d6f62a6520e01652d370654c5657d3c1a1Pratyush Anand req->queued = false; 24172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 24272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_del(&req->list); 243eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi req->trb = NULL; 24472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 24572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (req->request.status == -EINPROGRESS) 24672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.status = status; 24772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 2480416e494ce7dc84e2719bc9fb7daecb330476074Pratyush Anand if (dwc->ep0_bounced && dep->number == 0) 2490416e494ce7dc84e2719bc9fb7daecb330476074Pratyush Anand dwc->ep0_bounced = false; 2500416e494ce7dc84e2719bc9fb7daecb330476074Pratyush Anand else 2510416e494ce7dc84e2719bc9fb7daecb330476074Pratyush Anand usb_gadget_unmap_request(&dwc->gadget, &req->request, 2520416e494ce7dc84e2719bc9fb7daecb330476074Pratyush Anand req->direction); 25372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 25472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "request %p from %s completed %d/%d ===> %d\n", 25572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req, dep->name, req->request.actual, 25672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.length, status); 25772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 25872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock(&dwc->lock); 2590fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi req->request.complete(&dep->endpoint, &req->request); 26072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock(&dwc->lock); 26172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 26272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 26372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic const char *dwc3_gadget_ep_cmd_string(u8 cmd) 26472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 26572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (cmd) { 26672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_DEPSTARTCFG: 26772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Start New Configuration"; 26872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_ENDTRANSFER: 26972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "End Transfer"; 27072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_UPDATETRANSFER: 27172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Update Transfer"; 27272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_STARTTRANSFER: 27372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Start Transfer"; 27472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_CLEARSTALL: 27572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Clear Stall"; 27672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_SETSTALL: 27772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Set Stall"; 278802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman case DWC3_DEPCMD_GETEPSTATE: 279802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman return "Get Endpoint State"; 28072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_SETTRANSFRESOURCE: 28172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Set Endpoint Transfer Resource"; 28272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_SETEPCONFIG: 28372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Set Endpoint Configuration"; 28472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 28572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "UNKNOWN command"; 28672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 28772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 28872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 289b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbiint dwc3_send_gadget_generic_command(struct dwc3 *dwc, int cmd, u32 param) 290b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi{ 291b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi u32 timeout = 500; 292b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi u32 reg; 293b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi 294b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi dwc3_writel(dwc->regs, DWC3_DGCMDPAR, param); 295b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi dwc3_writel(dwc->regs, DWC3_DGCMD, cmd | DWC3_DGCMD_CMDACT); 296b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi 297b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi do { 298b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DGCMD); 299b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi if (!(reg & DWC3_DGCMD_CMDACT)) { 300b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi dev_vdbg(dwc->dev, "Command Complete --> %d\n", 301b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi DWC3_DGCMD_STATUS(reg)); 302b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi return 0; 303b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi } 304b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi 305b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi /* 306b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi * We can't sleep here, because it's also called from 307b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi * interrupt context. 308b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi */ 309b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi timeout--; 310b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi if (!timeout) 311b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi return -ETIMEDOUT; 312b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi udelay(1); 313b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi } while (1); 314b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi} 315b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi 31672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiint dwc3_send_gadget_ep_cmd(struct dwc3 *dwc, unsigned ep, 31772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned cmd, struct dwc3_gadget_ep_cmd_params *params) 31872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 31972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = dwc->eps[ep]; 32061d58242f634642de42d6a4098913b7254a65053Sebastian Andrzej Siewior u32 timeout = 500; 32172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 32272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 32372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s: cmd '%s' params %08x %08x %08x\n", 32472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name, 325dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi dwc3_gadget_ep_cmd_string(cmd), params->param0, 326dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params->param1, params->param2); 32772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 328dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEPCMDPAR0(ep), params->param0); 329dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEPCMDPAR1(ep), params->param1); 330dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEPCMDPAR2(ep), params->param2); 33172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 33272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEPCMD(ep), cmd | DWC3_DEPCMD_CMDACT); 33372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi do { 33472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DEPCMD(ep)); 33572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(reg & DWC3_DEPCMD_CMDACT)) { 336164f6e141ed214bda30fb219d41ec3254bd90886Felipe Balbi dev_vdbg(dwc->dev, "Command Complete --> %d\n", 337164f6e141ed214bda30fb219d41ec3254bd90886Felipe Balbi DWC3_DEPCMD_STATUS(reg)); 33872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 33972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 34072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 34172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 34272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We can't sleep here, because it is also called from 34372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * interrupt context. 34472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 34572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi timeout--; 34672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!timeout) 34772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -ETIMEDOUT; 34872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 34961d58242f634642de42d6a4098913b7254a65053Sebastian Andrzej Siewior udelay(1); 35072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } while (1); 35172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 35272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 35372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic dma_addr_t dwc3_trb_dma_offset(struct dwc3_ep *dep, 354f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi struct dwc3_trb *trb) 35572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 356c439ef87c33a1df30f528cb152151465c2529cacPaul Zimmerman u32 offset = (char *) trb - (char *) dep->trb_pool; 35772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 35872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return dep->trb_pool_dma + offset; 35972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 36072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 36172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_alloc_trb_pool(struct dwc3_ep *dep) 36272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 36372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 36472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 36572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->trb_pool) 36672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 36772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 36872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->number == 0 || dep->number == 1) 36972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 37072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 37172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->trb_pool = dma_alloc_coherent(dwc->dev, 37272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi sizeof(struct dwc3_trb) * DWC3_TRB_NUM, 37372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi &dep->trb_pool_dma, GFP_KERNEL); 37472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dep->trb_pool) { 37572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dep->dwc->dev, "failed to allocate trb pool for %s\n", 37672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 37772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -ENOMEM; 37872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 37972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 38072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 38172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 38272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 38372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_free_trb_pool(struct dwc3_ep *dep) 38472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 38572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 38672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 38772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(struct dwc3_trb) * DWC3_TRB_NUM, 38872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->trb_pool, dep->trb_pool_dma); 38972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 39072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->trb_pool = NULL; 39172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->trb_pool_dma = 0; 39272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 39372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 39472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_start_config(struct dwc3 *dwc, struct dwc3_ep *dep) 39572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 39672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 39772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 cmd; 39872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 39972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0x00, sizeof(params)); 40072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 40172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->number != 1) { 40272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd = DWC3_DEPCMD_DEPSTARTCFG; 40372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* XferRscIdx == 0 for ep0 and 2 for the remaining */ 404b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman if (dep->number > 1) { 405b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman if (dwc->start_config_issued) 406b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman return 0; 407b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman dwc->start_config_issued = true; 40872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd |= DWC3_DEPCMD_PARAM(2); 409b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman } 41072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 41172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return dwc3_send_gadget_ep_cmd(dwc, 0, cmd, ¶ms); 41272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 41372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 41472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 41572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 41672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 41772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_set_ep_config(struct dwc3 *dwc, struct dwc3_ep *dep, 418c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi const struct usb_endpoint_descriptor *desc, 4194b345c9a3c7452340fb477868d8db475f05978b1Felipe Balbi const struct usb_ss_ep_comp_descriptor *comp_desc, 4204b345c9a3c7452340fb477868d8db475f05978b1Felipe Balbi bool ignore) 42172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 42272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 42372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 42472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0x00, sizeof(params)); 42572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 426dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param0 = DWC3_DEPCFG_EP_TYPE(usb_endpoint_type(desc)) 427d2e9a13a388304bc2a7b25a6c34c6e2ab1540a5dChanho Park | DWC3_DEPCFG_MAX_PACKET_SIZE(usb_endpoint_maxp(desc)); 428d2e9a13a388304bc2a7b25a6c34c6e2ab1540a5dChanho Park 429d2e9a13a388304bc2a7b25a6c34c6e2ab1540a5dChanho Park /* Burst size is only needed in SuperSpeed mode */ 430d2e9a13a388304bc2a7b25a6c34c6e2ab1540a5dChanho Park if (dwc->gadget.speed == USB_SPEED_SUPER) { 431d2e9a13a388304bc2a7b25a6c34c6e2ab1540a5dChanho Park u32 burst = dep->endpoint.maxburst - 1; 432d2e9a13a388304bc2a7b25a6c34c6e2ab1540a5dChanho Park 433d2e9a13a388304bc2a7b25a6c34c6e2ab1540a5dChanho Park params.param0 |= DWC3_DEPCFG_BURST_SIZE(burst); 434d2e9a13a388304bc2a7b25a6c34c6e2ab1540a5dChanho Park } 43572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 4364b345c9a3c7452340fb477868d8db475f05978b1Felipe Balbi if (ignore) 4374b345c9a3c7452340fb477868d8db475f05978b1Felipe Balbi params.param0 |= DWC3_DEPCFG_IGN_SEQ_NUM; 4384b345c9a3c7452340fb477868d8db475f05978b1Felipe Balbi 439dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param1 = DWC3_DEPCFG_XFER_COMPLETE_EN 440dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi | DWC3_DEPCFG_XFER_NOT_READY_EN; 44172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 44218b7ede5f7ee2092aedcb578d3ac30bd5d4fc23cFelipe Balbi if (usb_ss_max_streams(comp_desc) && usb_endpoint_xfer_bulk(desc)) { 443dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param1 |= DWC3_DEPCFG_STREAM_CAPABLE 444dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi | DWC3_DEPCFG_STREAM_EVENT_EN; 445879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dep->stream_capable = true; 446879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi } 447879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi 44872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (usb_endpoint_xfer_isoc(desc)) 449dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param1 |= DWC3_DEPCFG_XFER_IN_PROGRESS_EN; 45072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 45172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 45272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We are doing 1:1 mapping for endpoints, meaning 45372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Physical Endpoints 2 maps to Logical Endpoint 2 and 45472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * so on. We consider the direction bit as part of the physical 45572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * endpoint number. So USB endpoint 0x81 is 0x03. 45672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 457dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param1 |= DWC3_DEPCFG_EP_NUMBER(dep->number); 45872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 45972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 46072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We must use the lower 16 TX FIFOs even though 46172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * HW might have more 46272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 46372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->direction) 464dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param0 |= DWC3_DEPCFG_FIFO_NUMBER(dep->number >> 1); 46572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 46672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (desc->bInterval) { 467dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param1 |= DWC3_DEPCFG_BINTERVAL_M1(desc->bInterval - 1); 46872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->interval = 1 << (desc->bInterval - 1); 46972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 47072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 47172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return dwc3_send_gadget_ep_cmd(dwc, dep->number, 47272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEPCMD_SETEPCONFIG, ¶ms); 47372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 47472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 47572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_set_xfer_resource(struct dwc3 *dwc, struct dwc3_ep *dep) 47672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 47772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 47872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 47972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0x00, sizeof(params)); 48072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 481dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param0 = DWC3_DEPXFERCFG_NUM_XFER_RES(1); 48272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 48372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return dwc3_send_gadget_ep_cmd(dwc, dep->number, 48472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEPCMD_SETTRANSFRESOURCE, ¶ms); 48572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 48672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 48772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/** 48872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * __dwc3_gadget_ep_enable - Initializes a HW endpoint 48972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * @dep: endpoint to be initialized 49072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * @desc: USB Endpoint Descriptor 49172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 49272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Caller should take care of locking 49372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 49472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int __dwc3_gadget_ep_enable(struct dwc3_ep *dep, 495c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi const struct usb_endpoint_descriptor *desc, 4964b345c9a3c7452340fb477868d8db475f05978b1Felipe Balbi const struct usb_ss_ep_comp_descriptor *comp_desc, 4974b345c9a3c7452340fb477868d8db475f05978b1Felipe Balbi bool ignore) 49872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 49972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 50072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 50172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret = -ENOMEM; 50272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 50372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) { 50472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_gadget_start_config(dwc, dep); 50572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 50672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 50772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 50872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 5094b345c9a3c7452340fb477868d8db475f05978b1Felipe Balbi ret = dwc3_gadget_set_ep_config(dwc, dep, desc, comp_desc, ignore); 51072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 51172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 51272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 51372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) { 514f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi struct dwc3_trb *trb_st_hw; 515f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi struct dwc3_trb *trb_link; 51672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 51772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_gadget_set_xfer_resource(dwc, dep); 51872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 51972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 52072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 52116e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz dep->endpoint.desc = desc; 522c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi dep->comp_desc = comp_desc; 52372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->type = usb_endpoint_type(desc); 52472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags |= DWC3_EP_ENABLED; 52572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 52672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DALEPENA); 52772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg |= DWC3_DALEPENA_EP(dep->number); 52872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DALEPENA, reg); 52972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 53072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!usb_endpoint_xfer_isoc(desc)) 53172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 53272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 53372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(&trb_link, 0, sizeof(trb_link)); 53472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 5351d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman /* Link TRB for ISOC. The HWO bit is never reset */ 53672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trb_st_hw = &dep->trb_pool[0]; 53772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 538f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb_link = &dep->trb_pool[DWC3_TRB_NUM - 1]; 53972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 540f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb_link->bpl = lower_32_bits(dwc3_trb_dma_offset(dep, trb_st_hw)); 541f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb_link->bph = upper_32_bits(dwc3_trb_dma_offset(dep, trb_st_hw)); 542f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb_link->ctrl |= DWC3_TRBCTL_LINK_TRB; 543f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb_link->ctrl |= DWC3_TRB_CTRL_HWO; 54472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 54572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 54672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 54772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 54872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 549624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewiorstatic void dwc3_stop_active_transfer(struct dwc3 *dwc, u32 epnum); 550624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewiorstatic void dwc3_remove_requests(struct dwc3 *dwc, struct dwc3_ep *dep) 55172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 55272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req; 55372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 554ea53b8828c50b7a5138a8931c41b2671682c86b5Felipe Balbi if (!list_empty(&dep->req_queued)) { 555624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior dwc3_stop_active_transfer(dwc, dep->number); 556624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior 55757911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand /* - giveback all requests to gadget driver */ 5581591633ed6c4c3994944f31ddb59bc072a2ed0caPratyush Anand while (!list_empty(&dep->req_queued)) { 5591591633ed6c4c3994944f31ddb59bc072a2ed0caPratyush Anand req = next_request(&dep->req_queued); 5601591633ed6c4c3994944f31ddb59bc072a2ed0caPratyush Anand 5611591633ed6c4c3994944f31ddb59bc072a2ed0caPratyush Anand dwc3_gadget_giveback(dep, req, -ESHUTDOWN); 5621591633ed6c4c3994944f31ddb59bc072a2ed0caPratyush Anand } 563ea53b8828c50b7a5138a8931c41b2671682c86b5Felipe Balbi } 564ea53b8828c50b7a5138a8931c41b2671682c86b5Felipe Balbi 56572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi while (!list_empty(&dep->request_list)) { 56672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req = next_request(&dep->request_list); 56772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 568624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior dwc3_gadget_giveback(dep, req, -ESHUTDOWN); 56972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 57072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 57172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 57272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/** 57372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * __dwc3_gadget_ep_disable - Disables a HW endpoint 57472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * @dep: the endpoint to disable 57572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 576624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior * This function also removes requests which are currently processed ny the 577624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior * hardware and those which are not yet scheduled. 578624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior * Caller should take care of locking. 57972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 58072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int __dwc3_gadget_ep_disable(struct dwc3_ep *dep) 58172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 58272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 58372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 58472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 585624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior dwc3_remove_requests(dwc, dep); 58672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 58772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DALEPENA); 58872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DALEPENA_EP(dep->number); 58972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DALEPENA, reg); 59072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 591879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dep->stream_capable = false; 592f9c56cdd3905c96c600456203637bd7ec8ec6383Ido Shayevitz dep->endpoint.desc = NULL; 593c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi dep->comp_desc = NULL; 59472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->type = 0; 595879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dep->flags = 0; 59672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 59772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 59872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 59972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 60072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 60172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 60272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep0_enable(struct usb_ep *ep, 60372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct usb_endpoint_descriptor *desc) 60472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 60572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EINVAL; 60672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 60772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 60872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep0_disable(struct usb_ep *ep) 60972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 61072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EINVAL; 61172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 61272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 61372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 61472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 61572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_enable(struct usb_ep *ep, 61672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct usb_endpoint_descriptor *desc) 61772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 61872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 61972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc; 62072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 62172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 62272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 62372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!ep || !desc || desc->bDescriptorType != USB_DT_ENDPOINT) { 62472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi pr_debug("dwc3: invalid parameters\n"); 62572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EINVAL; 62672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 62772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 62872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!desc->wMaxPacketSize) { 62972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi pr_debug("dwc3: missing wMaxPacketSize\n"); 63072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EINVAL; 63172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 63272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 63372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = to_dwc3_ep(ep); 63472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc = dep->dwc; 63572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 636c6f83f386c2f7987a344368e33e55840c12bd38fFelipe Balbi if (dep->flags & DWC3_EP_ENABLED) { 637c6f83f386c2f7987a344368e33e55840c12bd38fFelipe Balbi dev_WARN_ONCE(dwc->dev, true, "%s is already enabled\n", 638c6f83f386c2f7987a344368e33e55840c12bd38fFelipe Balbi dep->name); 639c6f83f386c2f7987a344368e33e55840c12bd38fFelipe Balbi return 0; 640c6f83f386c2f7987a344368e33e55840c12bd38fFelipe Balbi } 641c6f83f386c2f7987a344368e33e55840c12bd38fFelipe Balbi 64272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (usb_endpoint_type(desc)) { 64372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_ENDPOINT_XFER_CONTROL: 64427a78d6a283d6782438f72306746afe4bf44c215Anton Tikhomirov strlcat(dep->name, "-control", sizeof(dep->name)); 64572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 64672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_ENDPOINT_XFER_ISOC: 64727a78d6a283d6782438f72306746afe4bf44c215Anton Tikhomirov strlcat(dep->name, "-isoc", sizeof(dep->name)); 64872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 64972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_ENDPOINT_XFER_BULK: 65027a78d6a283d6782438f72306746afe4bf44c215Anton Tikhomirov strlcat(dep->name, "-bulk", sizeof(dep->name)); 65172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 65272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_ENDPOINT_XFER_INT: 65327a78d6a283d6782438f72306746afe4bf44c215Anton Tikhomirov strlcat(dep->name, "-int", sizeof(dep->name)); 65472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 65572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 65672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "invalid endpoint transfer type\n"); 65772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 65872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 65972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "Enabling %s\n", dep->name); 66072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 66172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 6624b345c9a3c7452340fb477868d8db475f05978b1Felipe Balbi ret = __dwc3_gadget_ep_enable(dep, desc, ep->comp_desc, false); 66372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 66472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 66572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 66672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 66772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 66872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_disable(struct usb_ep *ep) 66972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 67072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 67172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc; 67272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 67372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 67472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 67572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!ep) { 67672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi pr_debug("dwc3: invalid parameters\n"); 67772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EINVAL; 67872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 67972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 68072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = to_dwc3_ep(ep); 68172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc = dep->dwc; 68272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 68372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) { 68472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_WARN_ONCE(dwc->dev, true, "%s is already disabled\n", 68572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 68672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 68772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 68872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 68972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi snprintf(dep->name, sizeof(dep->name), "ep%d%s", 69072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->number >> 1, 69172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi (dep->number & 1) ? "in" : "out"); 69272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 69372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 69472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = __dwc3_gadget_ep_disable(dep); 69572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 69672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 69772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 69872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 69972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 70072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic struct usb_request *dwc3_gadget_ep_alloc_request(struct usb_ep *ep, 70172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi gfp_t gfp_flags) 70272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 70372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req; 70472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = to_dwc3_ep(ep); 70572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 70672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 70772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req = kzalloc(sizeof(*req), gfp_flags); 70872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!req) { 70972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "not enough memory\n"); 71072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return NULL; 71172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 71272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 71372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->epnum = dep->number; 71472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->dep = dep; 71572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 71672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return &req->request; 71772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 71872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 71972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_ep_free_request(struct usb_ep *ep, 72072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct usb_request *request) 72172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 72272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req = to_dwc3_request(request); 72372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 72472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi kfree(req); 72572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 72672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 727c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi/** 728c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi * dwc3_prepare_one_trb - setup one TRB from one request 729c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi * @dep: endpoint for which this request is prepared 730c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi * @req: dwc3_request pointer 731c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi */ 73268e823e24aea5227eaf20d6435485e733109d113Felipe Balbistatic void dwc3_prepare_one_trb(struct dwc3_ep *dep, 733eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi struct dwc3_request *req, dma_addr_t dma, 734e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand unsigned length, unsigned last, unsigned chain, unsigned node) 735c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi{ 736eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi struct dwc3 *dwc = dep->dwc; 737f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi struct dwc3_trb *trb; 738c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 739eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dev_vdbg(dwc->dev, "%s: req %p dma %08llx length %d%s%s\n", 740eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dep->name, req, (unsigned long long) dma, 741eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi length, last ? " last" : "", 742eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi chain ? " chain" : ""); 743eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi 744c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi /* Skip the LINK-TRB on ISOC */ 745915e202aeeb59e272992a6364c910aaef3073544Pratyush Anand if (((dep->free_slot & DWC3_TRB_MASK) == DWC3_TRB_NUM - 1) && 74616e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz usb_endpoint_xfer_isoc(dep->endpoint.desc)) 747915e202aeeb59e272992a6364c910aaef3073544Pratyush Anand dep->free_slot++; 748915e202aeeb59e272992a6364c910aaef3073544Pratyush Anand 749915e202aeeb59e272992a6364c910aaef3073544Pratyush Anand trb = &dep->trb_pool[dep->free_slot & DWC3_TRB_MASK]; 750c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 751eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (!req->trb) { 752eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dwc3_gadget_move_request_queued(req); 753f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi req->trb = trb; 754f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi req->trb_dma = dwc3_trb_dma_offset(dep, trb); 755e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand req->start_slot = dep->free_slot & DWC3_TRB_MASK; 756eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi } 757c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 758e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand dep->free_slot++; 759e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand 760f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->size = DWC3_TRB_SIZE_LENGTH(length); 761f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->bpl = lower_32_bits(dma); 762f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->bph = upper_32_bits(dma); 763c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 76416e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz switch (usb_endpoint_type(dep->endpoint.desc)) { 765c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi case USB_ENDPOINT_XFER_CONTROL: 766f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->ctrl = DWC3_TRBCTL_CONTROL_SETUP; 767c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi break; 768c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 769c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi case USB_ENDPOINT_XFER_ISOC: 770e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if (!node) 771e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand trb->ctrl = DWC3_TRBCTL_ISOCHRONOUS_FIRST; 772e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand else 773e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand trb->ctrl = DWC3_TRBCTL_ISOCHRONOUS; 774c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 775e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if (!req->request.no_interrupt && !chain) 776f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->ctrl |= DWC3_TRB_CTRL_IOC; 777c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi break; 778c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 779c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi case USB_ENDPOINT_XFER_BULK: 780c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi case USB_ENDPOINT_XFER_INT: 781f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->ctrl = DWC3_TRBCTL_NORMAL; 782c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi break; 783c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi default: 784c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi /* 785c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi * This is only possible with faulty memory because we 786c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi * checked it already :) 787c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi */ 788c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi BUG(); 789c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi } 790c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 79116e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if (usb_endpoint_xfer_isoc(dep->endpoint.desc)) { 792f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->ctrl |= DWC3_TRB_CTRL_ISP_IMI; 793f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->ctrl |= DWC3_TRB_CTRL_CSP; 794e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand } else if (last) { 795e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand trb->ctrl |= DWC3_TRB_CTRL_LST; 796f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi } 797c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 798e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if (chain) 799e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand trb->ctrl |= DWC3_TRB_CTRL_CHN; 800e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand 80116e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if (usb_endpoint_xfer_bulk(dep->endpoint.desc) && dep->stream_capable) 802f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->ctrl |= DWC3_TRB_CTRL_SID_SOFN(req->request.stream_id); 803c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 804f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->ctrl |= DWC3_TRB_CTRL_HWO; 805c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi} 806c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 80772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* 80872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * dwc3_prepare_trbs - setup TRBs from requests 80972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * @dep: endpoint for which requests are being prepared 81072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * @starting: true if the endpoint is idle and no requests are queued. 81172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 8121d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * The function goes through the requests list and sets up TRBs for the 8131d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * transfers. The function returns once there are no more TRBs available or 8141d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * it runs out of requests. 81572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 81668e823e24aea5227eaf20d6435485e733109d113Felipe Balbistatic void dwc3_prepare_trbs(struct dwc3_ep *dep, bool starting) 81772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 81868e823e24aea5227eaf20d6435485e733109d113Felipe Balbi struct dwc3_request *req, *n; 81972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 trbs_left; 8208d62cd65d74d0e241b3a152f7347bb66126b705bPaul Zimmerman u32 max; 821c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi unsigned int last_one = 0; 82272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 82372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi BUILD_BUG_ON_NOT_POWER_OF_2(DWC3_TRB_NUM); 82472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 82572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* the first request must not be queued */ 82672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trbs_left = (dep->busy_slot - dep->free_slot) & DWC3_TRB_MASK; 827c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 8288d62cd65d74d0e241b3a152f7347bb66126b705bPaul Zimmerman /* Can't wrap around on a non-isoc EP since there's no link TRB */ 82916e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if (!usb_endpoint_xfer_isoc(dep->endpoint.desc)) { 8308d62cd65d74d0e241b3a152f7347bb66126b705bPaul Zimmerman max = DWC3_TRB_NUM - (dep->free_slot & DWC3_TRB_MASK); 8318d62cd65d74d0e241b3a152f7347bb66126b705bPaul Zimmerman if (trbs_left > max) 8328d62cd65d74d0e241b3a152f7347bb66126b705bPaul Zimmerman trbs_left = max; 8338d62cd65d74d0e241b3a152f7347bb66126b705bPaul Zimmerman } 8348d62cd65d74d0e241b3a152f7347bb66126b705bPaul Zimmerman 83572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 8361d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * If busy & slot are equal than it is either full or empty. If we are 8371d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * starting to process requests then we are empty. Otherwise we are 83872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * full and don't do anything 83972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 84072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!trbs_left) { 84172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!starting) 84268e823e24aea5227eaf20d6435485e733109d113Felipe Balbi return; 84372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trbs_left = DWC3_TRB_NUM; 84472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 84572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * In case we start from scratch, we queue the ISOC requests 84672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * starting from slot 1. This is done because we use ring 84772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * buffer and have no LST bit to stop us. Instead, we place 8481d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * IOC bit every TRB_NUM/4. We try to avoid having an interrupt 84972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * after the first request so we start at slot 1 and have 85072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 7 requests proceed before we hit the first IOC. 85172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Other transfer types don't use the ring buffer and are 85272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * processed from the first TRB until the last one. Since we 85372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * don't wrap around we have to start at the beginning. 85472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 85516e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if (usb_endpoint_xfer_isoc(dep->endpoint.desc)) { 85672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->busy_slot = 1; 85772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->free_slot = 1; 85872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 85972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->busy_slot = 0; 86072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->free_slot = 0; 86172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 86272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 86372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 86472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* The last TRB is a link TRB, not used for xfer */ 86516e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if ((trbs_left <= 1) && usb_endpoint_xfer_isoc(dep->endpoint.desc)) 86668e823e24aea5227eaf20d6435485e733109d113Felipe Balbi return; 86772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 86872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_for_each_entry_safe(req, n, &dep->request_list, list) { 869eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi unsigned length; 870eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dma_addr_t dma; 871e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand last_one = false; 87272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 873eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (req->request.num_mapped_sgs > 0) { 874eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi struct usb_request *request = &req->request; 875eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi struct scatterlist *sg = request->sg; 876eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi struct scatterlist *s; 877eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi int i; 87872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 879eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi for_each_sg(sg, s, request->num_mapped_sgs, i) { 880eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi unsigned chain = true; 88172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 882eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi length = sg_dma_len(s); 883eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dma = sg_dma_address(s); 88472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 8851d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman if (i == (request->num_mapped_sgs - 1) || 8861d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman sg_is_last(s)) { 887e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if (list_is_last(&req->list, 888e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand &dep->request_list)) 889e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand last_one = true; 890eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi chain = false; 891eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi } 89272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 893eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi trbs_left--; 894eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (!trbs_left) 895eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi last_one = true; 89672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 897eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (last_one) 898eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi chain = false; 89972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 900eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dwc3_prepare_one_trb(dep, req, dma, length, 901e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand last_one, chain, i); 90272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 903eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (last_one) 904eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi break; 905eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi } 90672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 907eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dma = req->request.dma; 908eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi length = req->request.length; 909eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi trbs_left--; 91072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 911eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (!trbs_left) 912eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi last_one = 1; 913879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi 914eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi /* Is this the last request? */ 915eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (list_is_last(&req->list, &dep->request_list)) 916eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi last_one = 1; 91772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 918eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dwc3_prepare_one_trb(dep, req, dma, length, 919e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand last_one, false, 0); 92072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 921eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (last_one) 922eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi break; 92372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 92472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 92572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 92672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 92772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int __dwc3_gadget_kick_transfer(struct dwc3_ep *dep, u16 cmd_param, 92872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int start_new) 92972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 93072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 93172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req; 93272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 93372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 93472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 cmd; 93572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 93672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (start_new && (dep->flags & DWC3_EP_BUSY)) { 93772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s: endpoint busy\n", dep->name); 93872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EBUSY; 93972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 94072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags &= ~DWC3_EP_PENDING_REQUEST; 94172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 94272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 94372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * If we are getting here after a short-out-packet we don't enqueue any 94472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * new requests as we try to set the IOC bit only on the last request. 94572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 94672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (start_new) { 94772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (list_empty(&dep->req_queued)) 94872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_prepare_trbs(dep, start_new); 94972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 95072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* req points to the first request which will be sent */ 95172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req = next_request(&dep->req_queued); 95272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 95368e823e24aea5227eaf20d6435485e733109d113Felipe Balbi dwc3_prepare_trbs(dep, start_new); 95468e823e24aea5227eaf20d6435485e733109d113Felipe Balbi 95572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 9561d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * req points to the first request where HWO changed from 0 to 1 95772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 95868e823e24aea5227eaf20d6435485e733109d113Felipe Balbi req = next_request(&dep->req_queued); 95972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 96072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!req) { 96172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags |= DWC3_EP_PENDING_REQUEST; 96272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 96372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 96472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 96572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0, sizeof(params)); 96672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 9671877d6c9a57802d50a059cf2dacdba10168cece7Pratyush Anand if (start_new) { 9681877d6c9a57802d50a059cf2dacdba10168cece7Pratyush Anand params.param0 = upper_32_bits(req->trb_dma); 9691877d6c9a57802d50a059cf2dacdba10168cece7Pratyush Anand params.param1 = lower_32_bits(req->trb_dma); 97072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd = DWC3_DEPCMD_STARTTRANSFER; 9711877d6c9a57802d50a059cf2dacdba10168cece7Pratyush Anand } else { 97272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd = DWC3_DEPCMD_UPDATETRANSFER; 9731877d6c9a57802d50a059cf2dacdba10168cece7Pratyush Anand } 97472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 97572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd |= DWC3_DEPCMD_PARAM(cmd_param); 97672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, cmd, ¶ms); 97772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret < 0) { 97872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "failed to send STARTTRANSFER command\n"); 97972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 98072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 98172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * FIXME we need to iterate over the list of requests 98272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * here and stop, unmap, free and del each of the linked 9831d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * requests instead of what we do now. 98472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 9850fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi usb_gadget_unmap_request(&dwc->gadget, &req->request, 9860fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi req->direction); 98772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_del(&req->list); 98872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 98972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 99072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 99172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags |= DWC3_EP_BUSY; 99225b8ff68bf1d4954d4a9dcb4862c6b6a53cb09e2Felipe Balbi 993f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman if (start_new) { 994b4996a8631e80a2aaddb5c487ff6b9ad37315f70Felipe Balbi dep->resource_index = dwc3_gadget_ep_get_transfer_index(dwc, 995f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman dep->number); 996b4996a8631e80a2aaddb5c487ff6b9ad37315f70Felipe Balbi WARN_ON_ONCE(!dep->resource_index); 997f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman } 99825b8ff68bf1d4954d4a9dcb4862c6b6a53cb09e2Felipe Balbi 99972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 100072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 100172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1002d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anandstatic void __dwc3_gadget_start_isoc(struct dwc3 *dwc, 1003d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand struct dwc3_ep *dep, u32 cur_uf) 1004d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand{ 1005d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand u32 uf; 1006d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand 1007d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand if (list_empty(&dep->request_list)) { 1008d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand dev_vdbg(dwc->dev, "ISOC ep %s run out for requests.\n", 1009d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand dep->name); 1010f4a53c55117b82e895ec98b1765c9d66940377fcPratyush Anand dep->flags |= DWC3_EP_PENDING_REQUEST; 1011d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand return; 1012d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand } 1013d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand 1014d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand /* 4 micro frames in the future */ 1015d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand uf = cur_uf + dep->interval * 4; 1016d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand 1017d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand __dwc3_gadget_kick_transfer(dep, uf, 1); 1018d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand} 1019d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand 1020d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anandstatic void dwc3_gadget_start_isoc(struct dwc3 *dwc, 1021d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand struct dwc3_ep *dep, const struct dwc3_event_depevt *event) 1022d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand{ 1023d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand u32 cur_uf, mask; 1024d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand 1025d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand mask = ~(dep->interval - 1); 1026d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand cur_uf = event->parameters & mask; 1027d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand 1028d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand __dwc3_gadget_start_isoc(dwc, dep, cur_uf); 1029d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand} 1030d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand 103172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int __dwc3_gadget_ep_queue(struct dwc3_ep *dep, struct dwc3_request *req) 103272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 10330fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi struct dwc3 *dwc = dep->dwc; 10340fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi int ret; 10350fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi 103672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.actual = 0; 103772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.status = -EINPROGRESS; 103872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->direction = dep->direction; 103972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->epnum = dep->number; 104072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 104172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 104272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We only add to our list of requests now and 104372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * start consuming the list once we get XferNotReady 104472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * IRQ. 104572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 104672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * That way, we avoid doing anything that we don't need 104772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * to do now and defer it until the point we receive a 104872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * particular token from the Host side. 104972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 105072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * This will also avoid Host cancelling URBs due to too 10511d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * many NAKs. 105272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 10530fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi ret = usb_gadget_map_request(&dwc->gadget, &req->request, 10540fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi dep->direction); 10550fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi if (ret) 10560fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi return ret; 10570fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi 105872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_add_tail(&req->list, &dep->request_list); 105972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 106072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 1061b511e5e76bf488cd3eec1048483a3898393a4dcaFelipe Balbi * There are a few special cases: 106272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 1063f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman * 1. XferNotReady with empty list of requests. We need to kick the 1064f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman * transfer here in that situation, otherwise we will be NAKing 1065f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman * forever. If we get XferNotReady before gadget driver has a 1066f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman * chance to queue a request, we will ACK the IRQ but won't be 1067f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman * able to receive the data until the next request is queued. 1068f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman * The following code is handling exactly that. 106972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 107072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 107172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->flags & DWC3_EP_PENDING_REQUEST) { 1072f4a53c55117b82e895ec98b1765c9d66940377fcPratyush Anand /* 1073f4a53c55117b82e895ec98b1765c9d66940377fcPratyush Anand * If xfernotready is already elapsed and it is a case 1074f4a53c55117b82e895ec98b1765c9d66940377fcPratyush Anand * of isoc transfer, then issue END TRANSFER, so that 1075f4a53c55117b82e895ec98b1765c9d66940377fcPratyush Anand * you can receive xfernotready again and can have 1076f4a53c55117b82e895ec98b1765c9d66940377fcPratyush Anand * notion of current microframe. 1077f4a53c55117b82e895ec98b1765c9d66940377fcPratyush Anand */ 1078f4a53c55117b82e895ec98b1765c9d66940377fcPratyush Anand if (usb_endpoint_xfer_isoc(dep->endpoint.desc)) { 1079cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand if (list_empty(&dep->req_queued)) { 1080cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand dwc3_stop_active_transfer(dwc, dep->number); 1081cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand dep->flags = DWC3_EP_ENABLED; 1082cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand } 1083f4a53c55117b82e895ec98b1765c9d66940377fcPratyush Anand return 0; 1084f4a53c55117b82e895ec98b1765c9d66940377fcPratyush Anand } 1085f4a53c55117b82e895ec98b1765c9d66940377fcPratyush Anand 1086b511e5e76bf488cd3eec1048483a3898393a4dcaFelipe Balbi ret = __dwc3_gadget_kick_transfer(dep, 0, true); 1087348e026fafe2501281db5fb7fed599b337cad358Moiz Sonasath if (ret && ret != -EBUSY) 1088b511e5e76bf488cd3eec1048483a3898393a4dcaFelipe Balbi dev_dbg(dwc->dev, "%s: failed to kick transfers\n", 1089b511e5e76bf488cd3eec1048483a3898393a4dcaFelipe Balbi dep->name); 109015f86bde29f0fdfb877d9c753547fa2e2f5ef1fePratyush Anand return ret; 1091b511e5e76bf488cd3eec1048483a3898393a4dcaFelipe Balbi } 109272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1093b511e5e76bf488cd3eec1048483a3898393a4dcaFelipe Balbi /* 1094b511e5e76bf488cd3eec1048483a3898393a4dcaFelipe Balbi * 2. XferInProgress on Isoc EP with an active transfer. We need to 1095b511e5e76bf488cd3eec1048483a3898393a4dcaFelipe Balbi * kick the transfer here after queuing a request, otherwise the 1096b511e5e76bf488cd3eec1048483a3898393a4dcaFelipe Balbi * core may not see the modified TRB(s). 1097b511e5e76bf488cd3eec1048483a3898393a4dcaFelipe Balbi */ 1098b511e5e76bf488cd3eec1048483a3898393a4dcaFelipe Balbi if (usb_endpoint_xfer_isoc(dep->endpoint.desc) && 109979c9046ec52b5aaa9f055e3d928d676dd37a6f9dPratyush Anand (dep->flags & DWC3_EP_BUSY) && 110079c9046ec52b5aaa9f055e3d928d676dd37a6f9dPratyush Anand !(dep->flags & DWC3_EP_MISSED_ISOC)) { 1101b4996a8631e80a2aaddb5c487ff6b9ad37315f70Felipe Balbi WARN_ON_ONCE(!dep->resource_index); 1102b4996a8631e80a2aaddb5c487ff6b9ad37315f70Felipe Balbi ret = __dwc3_gadget_kick_transfer(dep, dep->resource_index, 1103b511e5e76bf488cd3eec1048483a3898393a4dcaFelipe Balbi false); 1104348e026fafe2501281db5fb7fed599b337cad358Moiz Sonasath if (ret && ret != -EBUSY) 110572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "%s: failed to kick transfers\n", 110672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 110715f86bde29f0fdfb877d9c753547fa2e2f5ef1fePratyush Anand return ret; 1108a092532483e3200a53c8b1170b3988cc668c07efFelipe Balbi } 110972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 111072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 111172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 111272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 111372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_queue(struct usb_ep *ep, struct usb_request *request, 111472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi gfp_t gfp_flags) 111572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 111672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req = to_dwc3_request(request); 111772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = to_dwc3_ep(ep); 111872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 111972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 112072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 112172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 112272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 112372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 112416e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if (!dep->endpoint.desc) { 112572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "trying to queue request %p to disabled %s\n", 112672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi request, ep->name); 112772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -ESHUTDOWN; 112872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 112972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 113072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "queing request %p to %s length %d\n", 113172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi request, ep->name, request->length); 113272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 113372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 113472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = __dwc3_gadget_ep_queue(dep, req); 113572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 113672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 113772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 113872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 113972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 114072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_dequeue(struct usb_ep *ep, 114172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct usb_request *request) 114272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 114372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req = to_dwc3_request(request); 114472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *r = NULL; 114572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 114672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = to_dwc3_ep(ep); 114772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 114872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 114972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 115072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret = 0; 115172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 115272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 115372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 115472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_for_each_entry(r, &dep->request_list, list) { 115572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (r == req) 115672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 115772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 115872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 115972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (r != req) { 116072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_for_each_entry(r, &dep->req_queued, list) { 116172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (r == req) 116272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 116372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 116472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (r == req) { 116572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* wait until it is processed */ 116672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_stop_active_transfer(dwc, dep->number); 1167e8d4e8be860d935099ffcf695dcd29b55ae50b36Pratyush Anand goto out1; 116872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 116972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "request %p was not queued to %s\n", 117072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi request, ep->name); 117172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EINVAL; 117272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto out0; 117372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 117472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1175e8d4e8be860d935099ffcf695dcd29b55ae50b36Pratyush Anandout1: 117672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* giveback the request */ 117772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_giveback(dep, req, -ECONNRESET); 117872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 117972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiout0: 118072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 118172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 118272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 118372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 118472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 118572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiint __dwc3_gadget_ep_set_halt(struct dwc3_ep *dep, int value) 118672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 118772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 118872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 118972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 119072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 119172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0x00, sizeof(params)); 119272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 119372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (value) { 119472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, 119572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEPCMD_SETSTALL, ¶ms); 119672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 119772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to %s STALL on %s\n", 119872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi value ? "set" : "clear", 119972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 120072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi else 120172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags |= DWC3_EP_STALL; 120272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 12035275455a6e6ae6b57303834b0afd267bb9657ffcPaul Zimmerman if (dep->flags & DWC3_EP_WEDGE) 12045275455a6e6ae6b57303834b0afd267bb9657ffcPaul Zimmerman return 0; 12055275455a6e6ae6b57303834b0afd267bb9657ffcPaul Zimmerman 120672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, 120772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEPCMD_CLEARSTALL, ¶ms); 120872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 120972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to %s STALL on %s\n", 121072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi value ? "set" : "clear", 121172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 121272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi else 121372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags &= ~DWC3_EP_STALL; 121472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 12155275455a6e6ae6b57303834b0afd267bb9657ffcPaul Zimmerman 121672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 121772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 121872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 121972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_set_halt(struct usb_ep *ep, int value) 122072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 122172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = to_dwc3_ep(ep); 122272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 122372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 122472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 122572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 122672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 122772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 122872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 122972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 123016e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if (usb_endpoint_xfer_isoc(dep->endpoint.desc)) { 123172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "%s is of Isochronous type\n", dep->name); 123272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EINVAL; 123372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto out; 123472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 123572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 123672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = __dwc3_gadget_ep_set_halt(dep, value); 123772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiout: 123872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 123972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 124072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 124172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 124272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 124372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_set_wedge(struct usb_ep *ep) 124472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 124572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = to_dwc3_ep(ep); 1246249a456930cd2df29d085fb738b0e8f4bc1680cfPaul Zimmerman struct dwc3 *dwc = dep->dwc; 1247249a456930cd2df29d085fb738b0e8f4bc1680cfPaul Zimmerman unsigned long flags; 124872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1249249a456930cd2df29d085fb738b0e8f4bc1680cfPaul Zimmerman spin_lock_irqsave(&dwc->lock, flags); 125072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags |= DWC3_EP_WEDGE; 1251249a456930cd2df29d085fb738b0e8f4bc1680cfPaul Zimmerman spin_unlock_irqrestore(&dwc->lock, flags); 125272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 125308f0d96670c53898b4154e7945e77cdd966003f7Pratyush Anand if (dep->number == 0 || dep->number == 1) 125408f0d96670c53898b4154e7945e77cdd966003f7Pratyush Anand return dwc3_gadget_ep0_set_halt(ep, 1); 125508f0d96670c53898b4154e7945e77cdd966003f7Pratyush Anand else 125608f0d96670c53898b4154e7945e77cdd966003f7Pratyush Anand return dwc3_gadget_ep_set_halt(ep, 1); 125772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 125872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 125972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 126072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 126172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic struct usb_endpoint_descriptor dwc3_gadget_ep0_desc = { 126272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .bLength = USB_DT_ENDPOINT_SIZE, 126372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .bDescriptorType = USB_DT_ENDPOINT, 126472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .bmAttributes = USB_ENDPOINT_XFER_CONTROL, 126572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi}; 126672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 126772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic const struct usb_ep_ops dwc3_gadget_ep0_ops = { 126872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .enable = dwc3_gadget_ep0_enable, 126972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .disable = dwc3_gadget_ep0_disable, 127072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .alloc_request = dwc3_gadget_ep_alloc_request, 127172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .free_request = dwc3_gadget_ep_free_request, 127272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .queue = dwc3_gadget_ep0_queue, 127372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .dequeue = dwc3_gadget_ep_dequeue, 127408f0d96670c53898b4154e7945e77cdd966003f7Pratyush Anand .set_halt = dwc3_gadget_ep0_set_halt, 127572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .set_wedge = dwc3_gadget_ep_set_wedge, 127672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi}; 127772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 127872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic const struct usb_ep_ops dwc3_gadget_ep_ops = { 127972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .enable = dwc3_gadget_ep_enable, 128072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .disable = dwc3_gadget_ep_disable, 128172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .alloc_request = dwc3_gadget_ep_alloc_request, 128272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .free_request = dwc3_gadget_ep_free_request, 128372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .queue = dwc3_gadget_ep_queue, 128472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .dequeue = dwc3_gadget_ep_dequeue, 128572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .set_halt = dwc3_gadget_ep_set_halt, 128672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .set_wedge = dwc3_gadget_ep_set_wedge, 128772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi}; 128872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 128972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 129072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 129172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_get_frame(struct usb_gadget *g) 129272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 129372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 129472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 129572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 129672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 129772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return DWC3_DSTS_SOFFN(reg); 129872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 129972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 130072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_wakeup(struct usb_gadget *g) 130172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 130272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 130372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 130472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long timeout; 130572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 130672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 130772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 130872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 130972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret = 0; 131072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 131172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 link_state; 131272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 speed; 131372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 131472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 131572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 131672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 131772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * According to the Databook Remote wakeup request should 131872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * be issued only when the device is in early suspend state. 131972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 132072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We can check that via USB Link State bits in DSTS register. 132172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 132272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 132372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 132472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi speed = reg & DWC3_DSTS_CONNECTSPD; 132572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (speed == DWC3_DSTS_SUPERSPEED) { 132672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "no wakeup on SuperSpeed\n"); 132772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EINVAL; 132872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto out; 132972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 133072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 133172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi link_state = DWC3_DSTS_USBLNKST(reg); 133272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 133372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (link_state) { 133472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_LINK_STATE_RX_DET: /* in HS, means Early Suspend */ 133572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_LINK_STATE_U3: /* in HS, means SUSPEND */ 133672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 133772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 133872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "can't wakeup from link state %d\n", 133972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi link_state); 134072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EINVAL; 134172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto out; 134272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 134372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 13448598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi ret = dwc3_gadget_set_link_state(dwc, DWC3_LINK_STATE_RECOV); 13458598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi if (ret < 0) { 13468598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi dev_err(dwc->dev, "failed to put link in Recovery\n"); 13478598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi goto out; 13488598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi } 134972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1350802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman /* Recent versions do this automatically */ 1351802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman if (dwc->revision < DWC3_REVISION_194A) { 1352802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman /* write zeroes to Link Change Request */ 1353fcc023c726b5879d8f3f0f0f48c45d09055272c4Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 1354802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman reg &= ~DWC3_DCTL_ULSTCHNGREQ_MASK; 1355802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman dwc3_writel(dwc->regs, DWC3_DCTL, reg); 1356802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman } 135772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 13581d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman /* poll until Link State changes to ON */ 135972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi timeout = jiffies + msecs_to_jiffies(100); 136072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 13611d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman while (!time_after(jiffies, timeout)) { 136272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 136372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 136472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* in HS, means ON */ 136572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (DWC3_DSTS_USBLNKST(reg) == DWC3_LINK_STATE_U0) 136672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 136772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 136872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 136972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (DWC3_DSTS_USBLNKST(reg) != DWC3_LINK_STATE_U0) { 137072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to send remote wakeup\n"); 137172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EINVAL; 137272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 137372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 137472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiout: 137572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 137672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 137772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 137872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 137972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 138072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_set_selfpowered(struct usb_gadget *g, 138172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int is_selfpowered) 138272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 138372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 1384249a456930cd2df29d085fb738b0e8f4bc1680cfPaul Zimmerman unsigned long flags; 138572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1386249a456930cd2df29d085fb738b0e8f4bc1680cfPaul Zimmerman spin_lock_irqsave(&dwc->lock, flags); 138772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->is_selfpowered = !!is_selfpowered; 1388249a456930cd2df29d085fb738b0e8f4bc1680cfPaul Zimmerman spin_unlock_irqrestore(&dwc->lock, flags); 138972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 139072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 139172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 139272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 13936f17f74b3d8345663f5fcfd834145685110075bdPratyush Anandstatic int dwc3_gadget_run_stop(struct dwc3 *dwc, int is_on) 139472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 139572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 139661d58242f634642de42d6a4098913b7254a65053Sebastian Andrzej Siewior u32 timeout = 500; 139772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 139872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 13998db7ed15f2557e26371e4b2d98fee290d992b715Felipe Balbi if (is_on) { 1400802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman if (dwc->revision <= DWC3_REVISION_187A) { 1401802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman reg &= ~DWC3_DCTL_TRGTULST_MASK; 1402802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman reg |= DWC3_DCTL_TRGTULST_RX_DET; 1403802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman } 1404802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman 1405802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman if (dwc->revision >= DWC3_REVISION_194A) 1406802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman reg &= ~DWC3_DCTL_KEEP_CONNECT; 1407802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman reg |= DWC3_DCTL_RUN_STOP; 14089fcb3bd8d12db29c101d3722d37ddef9d1915317Felipe Balbi dwc->pullups_connected = true; 14098db7ed15f2557e26371e4b2d98fee290d992b715Felipe Balbi } else { 141072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DCTL_RUN_STOP; 14119fcb3bd8d12db29c101d3722d37ddef9d1915317Felipe Balbi dwc->pullups_connected = false; 14128db7ed15f2557e26371e4b2d98fee290d992b715Felipe Balbi } 141372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 141472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 141572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 141672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi do { 141772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 141872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (is_on) { 141972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(reg & DWC3_DSTS_DEVCTRLHLT)) 142072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 142172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 142272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (reg & DWC3_DSTS_DEVCTRLHLT) 142372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 142472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 142572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi timeout--; 142672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!timeout) 14276f17f74b3d8345663f5fcfd834145685110075bdPratyush Anand return -ETIMEDOUT; 142861d58242f634642de42d6a4098913b7254a65053Sebastian Andrzej Siewior udelay(1); 142972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } while (1); 143072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 143172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "gadget %s data soft-%s\n", 143272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver 143372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ? dwc->gadget_driver->function : "no-function", 143472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi is_on ? "connect" : "disconnect"); 14356f17f74b3d8345663f5fcfd834145685110075bdPratyush Anand 14366f17f74b3d8345663f5fcfd834145685110075bdPratyush Anand return 0; 143772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 143872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 143972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_pullup(struct usb_gadget *g, int is_on) 144072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 144172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 144272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 14436f17f74b3d8345663f5fcfd834145685110075bdPratyush Anand int ret; 144472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 144572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi is_on = !!is_on; 144672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 144772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 14486f17f74b3d8345663f5fcfd834145685110075bdPratyush Anand ret = dwc3_gadget_run_stop(dwc, is_on); 144972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 145072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 14516f17f74b3d8345663f5fcfd834145685110075bdPratyush Anand return ret; 145272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 145372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 14548698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbistatic void dwc3_gadget_enable_irq(struct dwc3 *dwc) 14558698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi{ 14568698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi u32 reg; 14578698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi 14588698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi /* Enable all but Start and End of Frame IRQs */ 14598698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi reg = (DWC3_DEVTEN_VNDRDEVTSTRCVEDEN | 14608698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi DWC3_DEVTEN_EVNTOVERFLOWEN | 14618698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi DWC3_DEVTEN_CMDCMPLTEN | 14628698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi DWC3_DEVTEN_ERRTICERREN | 14638698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi DWC3_DEVTEN_WKUPEVTEN | 14648698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi DWC3_DEVTEN_ULSTCNGEN | 14658698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi DWC3_DEVTEN_CONNECTDONEEN | 14668698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi DWC3_DEVTEN_USBRSTEN | 14678698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi DWC3_DEVTEN_DISCONNEVTEN); 14688698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi 14698698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEVTEN, reg); 14708698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi} 14718698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi 14728698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbistatic void dwc3_gadget_disable_irq(struct dwc3 *dwc) 14738698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi{ 14748698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi /* mask all interrupts */ 14758698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEVTEN, 0x00); 14768698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi} 14778698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi 14788698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbistatic irqreturn_t dwc3_interrupt(int irq, void *_dwc); 1479b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbistatic irqreturn_t dwc3_thread_interrupt(int irq, void *_dwc); 14808698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi 148172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_start(struct usb_gadget *g, 148272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct usb_gadget_driver *driver) 148372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 148472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 148572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 148672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 148772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret = 0; 14888698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi int irq; 148972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 149072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1491b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi irq = platform_get_irq(to_platform_device(dwc->dev), 0); 1492b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi ret = request_threaded_irq(irq, dwc3_interrupt, dwc3_thread_interrupt, 1493b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi IRQF_SHARED | IRQF_ONESHOT, "dwc3", dwc); 1494b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi if (ret) { 1495b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi dev_err(dwc->dev, "failed to request irq #%d --> %d\n", 1496b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi irq, ret); 1497b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi goto err0; 1498b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi } 1499b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi 150072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 150172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 150272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dwc->gadget_driver) { 150372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "%s is already bound to %s\n", 150472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.name, 150572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver->driver.name); 150672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EBUSY; 1507b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi goto err1; 150872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 150972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 151072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver = driver; 151172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 151272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCFG); 151372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~(DWC3_DCFG_SPEED_MASK); 151407e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi 151507e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi /** 151607e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * WORKAROUND: DWC3 revision < 2.20a have an issue 151707e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * which would cause metastability state on Run/Stop 151807e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * bit if we try to force the IP to USB2-only mode. 151907e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * 152007e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * Because of that, we cannot configure the IP to any 152107e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * speed other than the SuperSpeed 152207e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * 152307e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * Refers to: 152407e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * 152507e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * STAR#9000525659: Clock Domain Crossing on DCTL in 152607e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * USB 2.0 Mode 152707e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi */ 152807e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi if (dwc->revision < DWC3_REVISION_220A) 152907e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi reg |= DWC3_DCFG_SUPERSPEED; 153007e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi else 153107e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi reg |= dwc->maximum_speed; 153272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCFG, reg); 153372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1534b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman dwc->start_config_issued = false; 1535b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman 153672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* Start with SuperSpeed Default */ 153772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(512); 153872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 153972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[0]; 15404b345c9a3c7452340fb477868d8db475f05978b1Felipe Balbi ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL, false); 154172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 154272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to enable %s\n", dep->name); 1543b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi goto err2; 154472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 154572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 154672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[1]; 15474b345c9a3c7452340fb477868d8db475f05978b1Felipe Balbi ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL, false); 154872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 154972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to enable %s\n", dep->name); 1550b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi goto err3; 155172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 155272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 155372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* begin to receive SETUP packets */ 1554c7fcdeb2627c46b7ec3f0bcb2054b10405f9a70eFelipe Balbi dwc->ep0state = EP0_SETUP_PHASE; 155572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_ep0_out_start(dwc); 155672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 15578698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi dwc3_gadget_enable_irq(dwc); 15588698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi 155972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 156072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 156172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 156272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1563b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbierr3: 156472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi __dwc3_gadget_ep_disable(dwc->eps[0]); 156572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1566b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbierr2: 1567cdcedd6981194e511cc206887db661d016069d68Felipe Balbi dwc->gadget_driver = NULL; 1568b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi 1569b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbierr1: 157072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 157172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1572b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi free_irq(irq, dwc); 1573b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi 1574b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbierr0: 157572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 157672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 157772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 157872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_stop(struct usb_gadget *g, 157972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct usb_gadget_driver *driver) 158072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 158172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 158272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 15838698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi int irq; 158472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 158572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 158672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 15878698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi dwc3_gadget_disable_irq(dwc); 158872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi __dwc3_gadget_ep_disable(dwc->eps[0]); 158972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi __dwc3_gadget_ep_disable(dwc->eps[1]); 159072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 159172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver = NULL; 159272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 159372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 159472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1595b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi irq = platform_get_irq(to_platform_device(dwc->dev), 0); 1596b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi free_irq(irq, dwc); 1597b0d7ffd44ba9cd2dfbf299674418193a5f9ed21aFelipe Balbi 159872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 159972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 1600802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman 160172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic const struct usb_gadget_ops dwc3_gadget_ops = { 160272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .get_frame = dwc3_gadget_get_frame, 160372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .wakeup = dwc3_gadget_wakeup, 160472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .set_selfpowered = dwc3_gadget_set_selfpowered, 160572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .pullup = dwc3_gadget_pullup, 160672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .udc_start = dwc3_gadget_start, 160772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .udc_stop = dwc3_gadget_stop, 160872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi}; 160972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 161072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 161172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 16126a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbistatic int dwc3_gadget_init_hw_endpoints(struct dwc3 *dwc, 16136a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi u8 num, u32 direction) 161472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 161572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 16166a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi u8 i; 161772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 16186a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi for (i = 0; i < num; i++) { 16196a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi u8 epnum = (i << 1) | (!!direction); 162072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 162172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = kzalloc(sizeof(*dep), GFP_KERNEL); 162272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dep) { 162372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "can't allocate endpoint %d\n", 162472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi epnum); 162572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -ENOMEM; 162672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 162772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 162872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->dwc = dwc; 162972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->number = epnum; 163072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->eps[epnum] = dep; 163172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 163272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi snprintf(dep->name, sizeof(dep->name), "ep%d%s", epnum >> 1, 163372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi (epnum & 1) ? "in" : "out"); 16346a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi 163572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->endpoint.name = dep->name; 163672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->direction = (epnum & 1); 163772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 163872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (epnum == 0 || epnum == 1) { 163972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->endpoint.maxpacket = 512; 16406048e4c69d80600baba35856651056860d5d8f5aPratyush Anand dep->endpoint.maxburst = 1; 164172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->endpoint.ops = &dwc3_gadget_ep0_ops; 164272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!epnum) 164372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ep0 = &dep->endpoint; 164472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 164572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 164672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 164772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->endpoint.maxpacket = 1024; 164812d36c16bde3ee0643d705caa87723de536dbe49Sebastian Andrzej Siewior dep->endpoint.max_streams = 15; 164972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->endpoint.ops = &dwc3_gadget_ep_ops; 165072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_add_tail(&dep->endpoint.ep_list, 165172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi &dwc->gadget.ep_list); 165272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 165372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_alloc_trb_pool(dep); 165425b8ff68bf1d4954d4a9dcb4862c6b6a53cb09e2Felipe Balbi if (ret) 165572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 165672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 165725b8ff68bf1d4954d4a9dcb4862c6b6a53cb09e2Felipe Balbi 165872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi INIT_LIST_HEAD(&dep->request_list); 165972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi INIT_LIST_HEAD(&dep->req_queued); 166072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 166172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 166272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 166372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 166472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 16656a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbistatic int dwc3_gadget_init_endpoints(struct dwc3 *dwc) 16666a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi{ 16676a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi int ret; 16686a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi 16696a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi INIT_LIST_HEAD(&dwc->gadget.ep_list); 16706a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi 16716a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi ret = dwc3_gadget_init_hw_endpoints(dwc, dwc->num_out_eps, 0); 16726a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi if (ret < 0) { 16736a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi dev_vdbg(dwc->dev, "failed to allocate OUT endpoints\n"); 16746a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi return ret; 16756a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi } 16766a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi 16776a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi ret = dwc3_gadget_init_hw_endpoints(dwc, dwc->num_in_eps, 1); 16786a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi if (ret < 0) { 16796a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi dev_vdbg(dwc->dev, "failed to allocate IN endpoints\n"); 16806a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi return ret; 16816a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi } 16826a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi 16836a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi return 0; 16846a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi} 16856a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi 168672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_free_endpoints(struct dwc3 *dwc) 168772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 168872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 168972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 epnum; 169072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 169172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi for (epnum = 0; epnum < DWC3_ENDPOINTS_NUM; epnum++) { 169272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[epnum]; 16936a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi if (!dep) 16946a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi continue; 16955bf8fae33d14cc5c3c53a926f9079f92c8b082b0George Cherian /* 16965bf8fae33d14cc5c3c53a926f9079f92c8b082b0George Cherian * Physical endpoints 0 and 1 are special; they form the 16975bf8fae33d14cc5c3c53a926f9079f92c8b082b0George Cherian * bi-directional USB endpoint 0. 16985bf8fae33d14cc5c3c53a926f9079f92c8b082b0George Cherian * 16995bf8fae33d14cc5c3c53a926f9079f92c8b082b0George Cherian * For those two physical endpoints, we don't allocate a TRB 17005bf8fae33d14cc5c3c53a926f9079f92c8b082b0George Cherian * pool nor do we add them the endpoints list. Due to that, we 17015bf8fae33d14cc5c3c53a926f9079f92c8b082b0George Cherian * shouldn't do these two operations otherwise we would end up 17025bf8fae33d14cc5c3c53a926f9079f92c8b082b0George Cherian * with all sorts of bugs when removing dwc3.ko. 17035bf8fae33d14cc5c3c53a926f9079f92c8b082b0George Cherian */ 17045bf8fae33d14cc5c3c53a926f9079f92c8b082b0George Cherian if (epnum != 0 && epnum != 1) { 17055bf8fae33d14cc5c3c53a926f9079f92c8b082b0George Cherian dwc3_free_trb_pool(dep); 170672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_del(&dep->endpoint.ep_list); 17075bf8fae33d14cc5c3c53a926f9079f92c8b082b0George Cherian } 170872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 170972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi kfree(dep); 171072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 171172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 171272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 171372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 1714e5caff6831d00d96b4618de939312570527ad54aFelipe Balbi 1715e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anandstatic int __dwc3_cleanup_done_trbs(struct dwc3 *dwc, struct dwc3_ep *dep, 1716e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand struct dwc3_request *req, struct dwc3_trb *trb, 171772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct dwc3_event_depevt *event, int status) 171872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 171972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned int count; 172072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned int s_pkt = 0; 1721d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand unsigned int trb_status; 172272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1723e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if ((trb->ctrl & DWC3_TRB_CTRL_HWO) && status != -ESHUTDOWN) 1724e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand /* 1725e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * We continue despite the error. There is not much we 1726e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * can do. If we don't clean it up we loop forever. If 1727e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * we skip the TRB then it gets overwritten after a 1728e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * while since we use them in a ring buffer. A BUG() 1729e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * would help. Lets hope that if this occurs, someone 1730e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * fixes the root cause instead of looking away :) 1731e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand */ 1732e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand dev_err(dwc->dev, "%s's TRB (%p) still owned by HW\n", 1733e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand dep->name, trb); 1734e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand count = trb->size & DWC3_TRB_SIZE_MASK; 1735e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand 1736e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if (dep->direction) { 1737e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if (count) { 1738e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand trb_status = DWC3_TRB_SIZE_TRBSTS(trb->size); 1739e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if (trb_status == DWC3_TRBSTS_MISSED_ISOC) { 1740e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand dev_dbg(dwc->dev, "incomplete IN transfer %s\n", 1741e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand dep->name); 1742e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand /* 1743e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * If missed isoc occurred and there is 1744e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * no request queued then issue END 1745e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * TRANSFER, so that core generates 1746e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * next xfernotready and we will issue 1747e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * a fresh START TRANSFER. 1748e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * If there are still queued request 1749e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * then wait, do not issue either END 1750e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * or UPDATE TRANSFER, just attach next 1751e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * request in request_list during 1752e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * giveback.If any future queued request 1753e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * is successfully transferred then we 1754e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * will issue UPDATE TRANSFER for all 1755e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * request in the request_list. 1756e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand */ 1757e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand dep->flags |= DWC3_EP_MISSED_ISOC; 1758e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand } else { 1759e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand dev_err(dwc->dev, "incomplete IN transfer %s\n", 1760e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand dep->name); 1761e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand status = -ECONNRESET; 1762e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand } 1763e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand } else { 1764e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand dep->flags &= ~DWC3_EP_MISSED_ISOC; 1765e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand } 1766e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand } else { 1767e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if (count && (event->status & DEPEVT_STATUS_SHORT)) 1768e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand s_pkt = 1; 1769e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand } 1770e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand 1771e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand /* 1772e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * We assume here we will always receive the entire data block 1773e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * which we should receive. Meaning, if we program RX to 1774e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * receive 4K but we receive only 2K, we assume that's all we 1775e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * should receive and we simply bounce the request back to the 1776e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * gadget driver for further processing. 1777e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand */ 1778e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand req->request.actual += req->request.length - count; 1779e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if (s_pkt) 1780e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand return 1; 1781e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if ((event->status & DEPEVT_STATUS_LST) && 1782e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand (trb->ctrl & (DWC3_TRB_CTRL_LST | 1783e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand DWC3_TRB_CTRL_HWO))) 1784e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand return 1; 1785e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if ((event->status & DEPEVT_STATUS_IOC) && 1786e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand (trb->ctrl & DWC3_TRB_CTRL_IOC)) 1787e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand return 1; 1788e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand return 0; 1789e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand} 1790e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand 1791e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anandstatic int dwc3_cleanup_done_reqs(struct dwc3 *dwc, struct dwc3_ep *dep, 1792e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand const struct dwc3_event_depevt *event, int status) 1793e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand{ 1794e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand struct dwc3_request *req; 1795e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand struct dwc3_trb *trb; 1796e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand unsigned int slot; 1797e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand unsigned int i; 1798e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand int ret; 1799e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand 180072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi do { 180172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req = next_request(&dep->req_queued); 1802d39ee7be2aaf0a53d7b5f43c13571bac95f7cc0cSebastian Andrzej Siewior if (!req) { 1803d39ee7be2aaf0a53d7b5f43c13571bac95f7cc0cSebastian Andrzej Siewior WARN_ON_ONCE(1); 1804d39ee7be2aaf0a53d7b5f43c13571bac95f7cc0cSebastian Andrzej Siewior return 1; 1805d39ee7be2aaf0a53d7b5f43c13571bac95f7cc0cSebastian Andrzej Siewior } 1806e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand i = 0; 1807e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand do { 1808e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand slot = req->start_slot + i; 1809e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if ((slot == DWC3_TRB_NUM - 1) && 1810e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand usb_endpoint_xfer_isoc(dep->endpoint.desc)) 1811e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand slot++; 1812e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand slot %= DWC3_TRB_NUM; 1813e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand trb = &dep->trb_pool[slot]; 181472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1815e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand ret = __dwc3_cleanup_done_trbs(dwc, dep, req, trb, 1816e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand event, status); 1817e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if (ret) 1818e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand break; 1819e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand }while (++i < req->request.num_mapped_sgs); 182072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 182172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_giveback(dep, req, status); 1822e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand 1823e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if (ret) 182472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 182572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } while (1); 182672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1827cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand if (usb_endpoint_xfer_isoc(dep->endpoint.desc) && 1828cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand list_empty(&dep->req_queued)) { 1829cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand if (list_empty(&dep->request_list)) { 1830cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand /* 1831cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand * If there is no entry in request list then do 1832cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand * not issue END TRANSFER now. Just set PENDING 1833cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand * flag, so that END TRANSFER is issued when an 1834cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand * entry is added into request list. 1835cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand */ 1836cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand dep->flags = DWC3_EP_PENDING_REQUEST; 1837cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand } else { 1838cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand dwc3_stop_active_transfer(dwc, dep->number); 1839cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand dep->flags = DWC3_EP_ENABLED; 1840cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand } 18417efea86c2868b8fd9df65e589e33aebe498ce21dPratyush Anand return 1; 18427efea86c2868b8fd9df65e589e33aebe498ce21dPratyush Anand } 18437efea86c2868b8fd9df65e589e33aebe498ce21dPratyush Anand 1844f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi if ((event->status & DEPEVT_STATUS_IOC) && 1845f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi (trb->ctrl & DWC3_TRB_CTRL_IOC)) 184672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 184772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 1; 184872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 184972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 185072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_endpoint_transfer_complete(struct dwc3 *dwc, 185172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep, const struct dwc3_event_depevt *event, 185272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int start_new) 185372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 185472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned status = 0; 185572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int clean_busy; 185672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 185772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (event->status & DEPEVT_STATUS_BUSERR) 185872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi status = -ECONNRESET; 185972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 18601d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman clean_busy = dwc3_cleanup_done_reqs(dwc, dep, event, status); 1861c2df85ca31645ed3c68c56bd30a3673e034224f1Paul Zimmerman if (clean_busy) 186272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags &= ~DWC3_EP_BUSY; 1863fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1864fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi /* 1865fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * WORKAROUND: This is the 2nd half of U1/U2 -> U0 workaround. 1866fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * See dwc3_gadget_linksts_change_interrupt() for 1st half. 1867fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi */ 1868fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi if (dwc->revision < DWC3_REVISION_183A) { 1869fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi u32 reg; 1870fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi int i; 1871fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1872fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi for (i = 0; i < DWC3_ENDPOINTS_NUM; i++) { 1873348e026fafe2501281db5fb7fed599b337cad358Moiz Sonasath dep = dwc->eps[i]; 1874fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1875fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) 1876fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi continue; 1877fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1878fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi if (!list_empty(&dep->req_queued)) 1879fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi return; 1880fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi } 1881fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1882fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 1883fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi reg |= dwc->u1u2; 1884fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 1885fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1886fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi dwc->u1u2 = 0; 1887fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi } 188872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 188972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 189072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_endpoint_interrupt(struct dwc3 *dwc, 189172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct dwc3_event_depevt *event) 189272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 189372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 189472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 epnum = event->endpoint_number; 189572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 189672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[epnum]; 189772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 18983336abb5b608300550136ddab7a7101b30d45fa7Felipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) 18993336abb5b608300550136ddab7a7101b30d45fa7Felipe Balbi return; 19003336abb5b608300550136ddab7a7101b30d45fa7Felipe Balbi 190172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s: %s\n", dep->name, 190272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_ep_event_string(event->endpoint_event)); 190372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 190472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (epnum == 0 || epnum == 1) { 190572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_ep0_interrupt(dwc, event); 190672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 190772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 190872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 190972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (event->endpoint_event) { 191072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPEVT_XFERCOMPLETE: 1911b4996a8631e80a2aaddb5c487ff6b9ad37315f70Felipe Balbi dep->resource_index = 0; 1912c2df85ca31645ed3c68c56bd30a3673e034224f1Paul Zimmerman 191316e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if (usb_endpoint_xfer_isoc(dep->endpoint.desc)) { 191472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "%s is an Isochronous endpoint\n", 191572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 191672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 191772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 191872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 191972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_endpoint_transfer_complete(dwc, dep, event, 1); 192072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 192172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPEVT_XFERINPROGRESS: 192216e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if (!usb_endpoint_xfer_isoc(dep->endpoint.desc)) { 192372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "%s is not an Isochronous endpoint\n", 192472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 192572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 192672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 192772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 192872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_endpoint_transfer_complete(dwc, dep, event, 0); 192972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 193072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPEVT_XFERNOTREADY: 193116e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if (usb_endpoint_xfer_isoc(dep->endpoint.desc)) { 193272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_start_isoc(dwc, dep, event); 193372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 193472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 193572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 193672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s: reason %s\n", 193740aa41fba348bc5bd19ff5bcf2b03d67bb01d1ceFelipe Balbi dep->name, event->status & 193840aa41fba348bc5bd19ff5bcf2b03d67bb01d1ceFelipe Balbi DEPEVT_STATUS_TRANSFER_ACTIVE 193972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ? "Transfer Active" 194072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi : "Transfer Not Active"); 194172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 194272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = __dwc3_gadget_kick_transfer(dep, 0, 1); 194372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!ret || ret == -EBUSY) 194472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 194572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 194672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "%s: failed to kick transfers\n", 194772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 194872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 194972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 195072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 1951879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi case DWC3_DEPEVT_STREAMEVT: 195216e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if (!usb_endpoint_xfer_bulk(dep->endpoint.desc)) { 1953879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dev_err(dwc->dev, "Stream event for non-Bulk %s\n", 1954879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dep->name); 1955879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi return; 1956879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi } 1957879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi 1958879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi switch (event->status) { 1959879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi case DEPEVT_STREAMEVT_FOUND: 1960879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dev_vdbg(dwc->dev, "Stream %d found and started\n", 1961879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi event->parameters); 1962879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi 1963879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi break; 1964879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi case DEPEVT_STREAMEVT_NOTFOUND: 1965879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi /* FALLTHROUGH */ 1966879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi default: 1967879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dev_dbg(dwc->dev, "Couldn't find suitable stream\n"); 1968879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi } 1969879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi break; 197072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPEVT_RXTXFIFOEVT: 197172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "%s FIFO Overrun\n", dep->name); 197272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 197372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPEVT_EPCMDCMPLT: 1974ea53b8828c50b7a5138a8931c41b2671682c86b5Felipe Balbi dev_vdbg(dwc->dev, "Endpoint Command Complete\n"); 197572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 197672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 197772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 197872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 197972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_disconnect_gadget(struct dwc3 *dwc) 198072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 198172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dwc->gadget_driver && dwc->gadget_driver->disconnect) { 198272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock(&dwc->lock); 198372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver->disconnect(&dwc->gadget); 198472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock(&dwc->lock); 198572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 198672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 198772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 198872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_stop_active_transfer(struct dwc3 *dwc, u32 epnum) 198972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 199072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 199172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 199272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 cmd; 199372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 199472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 199572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[epnum]; 199672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1997b4996a8631e80a2aaddb5c487ff6b9ad37315f70Felipe Balbi if (!dep->resource_index) 19983daf74d78dfcd552445c35f1b82a271ca305ceb9Pratyush Anand return; 19993daf74d78dfcd552445c35f1b82a271ca305ceb9Pratyush Anand 200057911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand /* 200157911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * NOTICE: We are violating what the Databook says about the 200257911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * EndTransfer command. Ideally we would _always_ wait for the 200357911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * EndTransfer Command Completion IRQ, but that's causing too 200457911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * much trouble synchronizing between us and gadget driver. 200557911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * 200657911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * We have discussed this with the IP Provider and it was 200757911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * suggested to giveback all requests here, but give HW some 200857911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * extra time to synchronize with the interconnect. We're using 200957911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * an arbitraty 100us delay for that. 201057911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * 201157911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * Note also that a similar handling was tested by Synopsys 201257911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * (thanks a lot Paul) and nothing bad has come out of it. 201357911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * In short, what we're doing is: 201457911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * 201557911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * - Issue EndTransfer WITH CMDIOC bit set 201657911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * - Wait 100us 201757911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand */ 201857911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand 20193daf74d78dfcd552445c35f1b82a271ca305ceb9Pratyush Anand cmd = DWC3_DEPCMD_ENDTRANSFER; 20203daf74d78dfcd552445c35f1b82a271ca305ceb9Pratyush Anand cmd |= DWC3_DEPCMD_HIPRI_FORCERM | DWC3_DEPCMD_CMDIOC; 2021b4996a8631e80a2aaddb5c487ff6b9ad37315f70Felipe Balbi cmd |= DWC3_DEPCMD_PARAM(dep->resource_index); 20223daf74d78dfcd552445c35f1b82a271ca305ceb9Pratyush Anand memset(¶ms, 0, sizeof(params)); 20233daf74d78dfcd552445c35f1b82a271ca305ceb9Pratyush Anand ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, cmd, ¶ms); 20243daf74d78dfcd552445c35f1b82a271ca305ceb9Pratyush Anand WARN_ON_ONCE(ret); 2025b4996a8631e80a2aaddb5c487ff6b9ad37315f70Felipe Balbi dep->resource_index = 0; 2026041d81f493d90c940ec41f0ec98bc7c4f2fba431Felipe Balbi dep->flags &= ~DWC3_EP_BUSY; 202757911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand udelay(100); 202872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 202972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 203072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_stop_active_transfers(struct dwc3 *dwc) 203172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 203272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 epnum; 203372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 203472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi for (epnum = 2; epnum < DWC3_ENDPOINTS_NUM; epnum++) { 203572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 203672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 203772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[epnum]; 20386a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi if (!dep) 20396a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi continue; 20406a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi 204172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) 204272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi continue; 204372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 2044624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior dwc3_remove_requests(dwc, dep); 204572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 204672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 204772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 204872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_clear_stall_all_ep(struct dwc3 *dwc) 204972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 205072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 epnum; 205172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 205272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi for (epnum = 1; epnum < DWC3_ENDPOINTS_NUM; epnum++) { 205372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 205472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 205572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 205672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 205772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[epnum]; 20586a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi if (!dep) 20596a1e3ef45fb0c4d79cbb5190c8fc59263c630b0eFelipe Balbi continue; 206072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 206172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(dep->flags & DWC3_EP_STALL)) 206272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi continue; 206372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 206472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags &= ~DWC3_EP_STALL; 206572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 206672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0, sizeof(params)); 206772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, 206872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEPCMD_CLEARSTALL, ¶ms); 206972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi WARN_ON_ONCE(ret); 207072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 207172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 207272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 207372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_disconnect_interrupt(struct dwc3 *dwc) 207472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 2075c4430a26948b84c0d820e83f8c640229f960d3b6Felipe Balbi int reg; 2076c4430a26948b84c0d820e83f8c640229f960d3b6Felipe Balbi 207772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s\n", __func__); 207872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 207972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 208072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DCTL_INITU1ENA; 208172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 208272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 208372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DCTL_INITU2ENA; 208472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 208572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 208672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_disconnect_gadget(dwc); 2087b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman dwc->start_config_issued = false; 208872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 208972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_UNKNOWN; 2090df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi dwc->setup_packet_pending = false; 209172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 209272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 2093d7a46a8dfc45191b39daa19c05d3ff74d1881f15Paul Zimmermanstatic void dwc3_gadget_usb3_phy_suspend(struct dwc3 *dwc, int suspend) 209472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 209572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 209672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 209772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(0)); 209872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 2099d7a46a8dfc45191b39daa19c05d3ff74d1881f15Paul Zimmerman if (suspend) 210072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg |= DWC3_GUSB3PIPECTL_SUSPHY; 2101d7a46a8dfc45191b39daa19c05d3ff74d1881f15Paul Zimmerman else 2102d7a46a8dfc45191b39daa19c05d3ff74d1881f15Paul Zimmerman reg &= ~DWC3_GUSB3PIPECTL_SUSPHY; 210372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 210472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg); 210572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 210672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 2107d7a46a8dfc45191b39daa19c05d3ff74d1881f15Paul Zimmermanstatic void dwc3_gadget_usb2_phy_suspend(struct dwc3 *dwc, int suspend) 210872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 210972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 211072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 211172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0)); 211272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 2113d7a46a8dfc45191b39daa19c05d3ff74d1881f15Paul Zimmerman if (suspend) 211472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg |= DWC3_GUSB2PHYCFG_SUSPHY; 2115d7a46a8dfc45191b39daa19c05d3ff74d1881f15Paul Zimmerman else 2116d7a46a8dfc45191b39daa19c05d3ff74d1881f15Paul Zimmerman reg &= ~DWC3_GUSB2PHYCFG_SUSPHY; 211772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 211872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg); 211972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 212072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 212172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_reset_interrupt(struct dwc3 *dwc) 212272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 212372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 212472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 212572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s\n", __func__); 212672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 2127df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi /* 2128df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * WORKAROUND: DWC3 revisions <1.88a have an issue which 2129df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * would cause a missing Disconnect Event if there's a 2130df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * pending Setup Packet in the FIFO. 2131df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * 2132df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * There's no suggested workaround on the official Bug 2133df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * report, which states that "unless the driver/application 2134df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * is doing any special handling of a disconnect event, 2135df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * there is no functional issue". 2136df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * 2137df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * Unfortunately, it turns out that we _do_ some special 2138df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * handling of a disconnect event, namely complete all 2139df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * pending transfers, notify gadget driver of the 2140df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * disconnection, and so on. 2141df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * 2142df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * Our suggested workaround is to follow the Disconnect 2143df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * Event steps here, instead, based on a setup_packet_pending 2144df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * flag. Such flag gets set whenever we have a XferNotReady 2145df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * event on EP0 and gets cleared on XferComplete for the 2146df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * same endpoint. 2147df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * 2148df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * Refers to: 2149df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * 2150df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * STAR#9000466709: RTL: Device : Disconnect event not 2151df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * generated if setup packet pending in FIFO 2152df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi */ 2153df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi if (dwc->revision < DWC3_REVISION_188A) { 2154df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi if (dwc->setup_packet_pending) 2155df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi dwc3_gadget_disconnect_interrupt(dwc); 2156df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi } 2157df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi 2158961906edb549c95f4cc33e4f3dbfd0fcc364954dFelipe Balbi /* after reset -> Default State */ 215914cd592f72ea1ce1a25d7a576a5ed6aa761456bcFelipe Balbi usb_gadget_set_state(&dwc->gadget, USB_STATE_DEFAULT); 2160961906edb549c95f4cc33e4f3dbfd0fcc364954dFelipe Balbi 2161802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman /* Recent versions support automatic phy suspend and don't need this */ 2162802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman if (dwc->revision < DWC3_REVISION_194A) { 2163802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman /* Resume PHYs */ 2164802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman dwc3_gadget_usb2_phy_suspend(dwc, false); 2165802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman dwc3_gadget_usb3_phy_suspend(dwc, false); 2166802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman } 216772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 216872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dwc->gadget.speed != USB_SPEED_UNKNOWN) 216972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_disconnect_gadget(dwc); 217072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 217172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 217272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DCTL_TSTCTRL_MASK; 217372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 21743b637367ae40b6d3c20e30cb0cdd059e67bbf848Gerard Cauvy dwc->test_mode = false; 217572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 217672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_stop_active_transfers(dwc); 217772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_clear_stall_all_ep(dwc); 2178b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman dwc->start_config_issued = false; 217972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 218072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* Reset device address to zero */ 218172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCFG); 218272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~(DWC3_DCFG_DEVADDR_MASK); 218372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCFG, reg); 218472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 218572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 218672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_update_ram_clk_sel(struct dwc3 *dwc, u32 speed) 218772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 218872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 218972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 usb30_clock = DWC3_GCTL_CLK_BUS; 219072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 219172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 219272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We change the clock only at SS but I dunno why I would want to do 219372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * this. Maybe it becomes part of the power saving plan. 219472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 219572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 219672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (speed != DWC3_DSTS_SUPERSPEED) 219772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 219872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 219972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 220072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * RAMClkSel is reset to 0 after USB reset, so it must be reprogrammed 220172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * each time on Connect Done. 220272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 220372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!usb30_clock) 220472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 220572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 220672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_GCTL); 220772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg |= DWC3_GCTL_RAMCLKSEL(usb30_clock); 220872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_GCTL, reg); 220972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 221072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 2211d7a46a8dfc45191b39daa19c05d3ff74d1881f15Paul Zimmermanstatic void dwc3_gadget_phy_suspend(struct dwc3 *dwc, u8 speed) 221272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 221372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (speed) { 221472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_SPEED_SUPER: 2215d7a46a8dfc45191b39daa19c05d3ff74d1881f15Paul Zimmerman dwc3_gadget_usb2_phy_suspend(dwc, true); 221672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 221772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_SPEED_HIGH: 221872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_SPEED_FULL: 221972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_SPEED_LOW: 2220d7a46a8dfc45191b39daa19c05d3ff74d1881f15Paul Zimmerman dwc3_gadget_usb3_phy_suspend(dwc, true); 222172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 222272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 222372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 222472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 222572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_conndone_interrupt(struct dwc3 *dwc) 222672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 222772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 222872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 222972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 223072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 speed; 223172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 223272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s\n", __func__); 223372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 223472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 223572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi speed = reg & DWC3_DSTS_CONNECTSPD; 223672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->speed = speed; 223772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 223872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_update_ram_clk_sel(dwc, speed); 223972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 224072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (speed) { 224172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DCFG_SUPERSPEED: 224205870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi /* 224305870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * WORKAROUND: DWC3 revisions <1.90a have an issue which 224405870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * would cause a missing USB3 Reset event. 224505870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * 224605870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * In such situations, we should force a USB3 Reset 224705870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * event by calling our dwc3_gadget_reset_interrupt() 224805870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * routine. 224905870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * 225005870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * Refers to: 225105870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * 225205870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * STAR#9000483510: RTL: SS : USB3 reset event may 225305870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * not be generated always when the link enters poll 225405870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi */ 225505870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi if (dwc->revision < DWC3_REVISION_190A) 225605870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi dwc3_gadget_reset_interrupt(dwc); 225705870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi 225872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(512); 225972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ep0->maxpacket = 512; 226072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_SUPER; 226172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 226272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DCFG_HIGHSPEED: 226372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(64); 226472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ep0->maxpacket = 64; 226572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_HIGH; 226672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 226772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DCFG_FULLSPEED2: 226872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DCFG_FULLSPEED1: 226972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(64); 227072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ep0->maxpacket = 64; 227172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_FULL; 227272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 227372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DCFG_LOWSPEED: 227472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(8); 227572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ep0->maxpacket = 8; 227672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_LOW; 227772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 227872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 227972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 22802b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand /* Enable USB2 LPM Capability */ 22812b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand 22822b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand if ((dwc->revision > DWC3_REVISION_194A) 22832b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand && (speed != DWC3_DCFG_SUPERSPEED)) { 22842b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand reg = dwc3_readl(dwc->regs, DWC3_DCFG); 22852b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand reg |= DWC3_DCFG_LPM_CAP; 22862b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand dwc3_writel(dwc->regs, DWC3_DCFG, reg); 22872b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand 22882b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand reg = dwc3_readl(dwc->regs, DWC3_DCTL); 22892b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand reg &= ~(DWC3_DCTL_HIRD_THRES_MASK | DWC3_DCTL_L1_HIBER_EN); 22902b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand 22911a947746dbe1486d0e305ab512ddf085b7874cb3Felipe Balbi /* 22921a947746dbe1486d0e305ab512ddf085b7874cb3Felipe Balbi * TODO: This should be configurable. For now using 22931a947746dbe1486d0e305ab512ddf085b7874cb3Felipe Balbi * maximum allowed HIRD threshold value of 0b1100 22941a947746dbe1486d0e305ab512ddf085b7874cb3Felipe Balbi */ 22951a947746dbe1486d0e305ab512ddf085b7874cb3Felipe Balbi reg |= DWC3_DCTL_HIRD_THRES(12); 22962b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand 22972b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand dwc3_writel(dwc->regs, DWC3_DCTL, reg); 22982b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand } 22992b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand 2300802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman /* Recent versions support automatic phy suspend and don't need this */ 2301802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman if (dwc->revision < DWC3_REVISION_194A) { 2302802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman /* Suspend unneeded PHY */ 2303802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman dwc3_gadget_phy_suspend(dwc, dwc->gadget.speed); 2304802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman } 230572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 230672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[0]; 23074b345c9a3c7452340fb477868d8db475f05978b1Felipe Balbi ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL, true); 230872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 230972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to enable %s\n", dep->name); 231072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 231172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 231272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 231372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[1]; 23144b345c9a3c7452340fb477868d8db475f05978b1Felipe Balbi ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL, true); 231572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 231672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to enable %s\n", dep->name); 231772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 231872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 231972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 232072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 232172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Configure PHY via GUSB3PIPECTLn if required. 232272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 232372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Update GTXFIFOSIZn 232472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 232572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * In both cases reset values should be sufficient. 232672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 232772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 232872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 232972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_wakeup_interrupt(struct dwc3 *dwc) 233072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 233172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s\n", __func__); 233272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 233372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 233472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * TODO take core out of low power mode when that's 233572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * implemented. 233672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 233772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 233872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver->resume(&dwc->gadget); 233972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 234072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 234172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_linksts_change_interrupt(struct dwc3 *dwc, 234272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned int evtinfo) 234372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 2344fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi enum dwc3_link_state next = evtinfo & DWC3_LINK_STATE_MASK; 23450b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi unsigned int pwropt; 23460b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi 23470b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi /* 23480b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi * WORKAROUND: DWC3 < 2.50a have an issue when configured without 23490b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi * Hibernation mode enabled which would show up when device detects 23500b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi * host-initiated U3 exit. 23510b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi * 23520b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi * In that case, device will generate a Link State Change Interrupt 23530b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi * from U3 to RESUME which is only necessary if Hibernation is 23540b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi * configured in. 23550b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi * 23560b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi * There are no functional changes due to such spurious event and we 23570b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi * just need to ignore it. 23580b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi * 23590b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi * Refers to: 23600b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi * 23610b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi * STAR#9000570034 RTL: SS Resume event generated in non-Hibernation 23620b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi * operational mode 23630b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi */ 23640b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi pwropt = DWC3_GHWPARAMS1_EN_PWROPT(dwc->hwparams.hwparams1); 23650b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi if ((dwc->revision < DWC3_REVISION_250A) && 23660b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi (pwropt != DWC3_GHWPARAMS1_EN_PWROPT_HIB)) { 23670b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi if ((dwc->link_state == DWC3_LINK_STATE_U3) && 23680b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi (next == DWC3_LINK_STATE_RESUME)) { 23690b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi dev_vdbg(dwc->dev, "ignoring transition U3 -> Resume\n"); 23700b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi return; 23710b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi } 23720b0cc1cd31bed3e3147398e54530f1f819b27692Felipe Balbi } 2373fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 2374fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi /* 2375fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * WORKAROUND: DWC3 Revisions <1.83a have an issue which, depending 2376fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * on the link partner, the USB session might do multiple entry/exit 2377fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * of low power states before a transfer takes place. 2378fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * 2379fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * Due to this problem, we might experience lower throughput. The 2380fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * suggested workaround is to disable DCTL[12:9] bits if we're 2381fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * transitioning from U1/U2 to U0 and enable those bits again 2382fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * after a transfer completes and there are no pending transfers 2383fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * on any of the enabled endpoints. 2384fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * 2385fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * This is the first half of that workaround. 2386fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * 2387fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * Refers to: 2388fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * 2389fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * STAR#9000446952: RTL: Device SS : if U1/U2 ->U0 takes >128us 2390fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * core send LGO_Ux entering U0 2391fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi */ 2392fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi if (dwc->revision < DWC3_REVISION_183A) { 2393fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi if (next == DWC3_LINK_STATE_U0) { 2394fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi u32 u1u2; 2395fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi u32 reg; 2396fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 2397fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi switch (dwc->link_state) { 2398fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi case DWC3_LINK_STATE_U1: 2399fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi case DWC3_LINK_STATE_U2: 2400fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 2401fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi u1u2 = reg & (DWC3_DCTL_INITU2ENA 2402fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi | DWC3_DCTL_ACCEPTU2ENA 2403fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi | DWC3_DCTL_INITU1ENA 2404fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi | DWC3_DCTL_ACCEPTU1ENA); 2405fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 2406fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi if (!dwc->u1u2) 2407fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi dwc->u1u2 = reg & u1u2; 2408fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 2409fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi reg &= ~u1u2; 2410fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 2411fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 2412fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi break; 2413fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi default: 2414fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi /* do nothing */ 2415fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi break; 2416fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi } 2417fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi } 2418fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi } 2419fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 2420fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi dwc->link_state = next; 2421019ac83252dc2b356cb0ca81c25a077ec90309e7Felipe Balbi 2422019ac83252dc2b356cb0ca81c25a077ec90309e7Felipe Balbi dev_vdbg(dwc->dev, "%s link %d\n", __func__, dwc->link_state); 242372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 242472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 242572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_interrupt(struct dwc3 *dwc, 242672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct dwc3_event_devt *event) 242772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 242872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (event->type) { 242972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_DISCONNECT: 243072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_disconnect_interrupt(dwc); 243172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 243272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_RESET: 243372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_reset_interrupt(dwc); 243472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 243572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_CONNECT_DONE: 243672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_conndone_interrupt(dwc); 243772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 243872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_WAKEUP: 243972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_wakeup_interrupt(dwc); 244072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 244172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_LINK_STATUS_CHANGE: 244272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_linksts_change_interrupt(dwc, event->event_info); 244372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 244472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_EOPF: 244572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "End of Periodic Frame\n"); 244672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 244772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_SOF: 244872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "Start of Periodic Frame\n"); 244972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 245072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_ERRATIC_ERROR: 245172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "Erratic Error\n"); 245272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 245372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_CMD_CMPL: 245472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "Command Complete\n"); 245572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 245672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_OVERFLOW: 245772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "Overflow\n"); 245872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 245972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 246072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "UNKNOWN IRQ %d\n", event->type); 246172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 246272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 246372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 246472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_process_event_entry(struct dwc3 *dwc, 246572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const union dwc3_event *event) 246672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 246772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* Endpoint IRQ, handle it and return early */ 246872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (event->type.is_devspec == 0) { 246972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* depevt */ 247072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return dwc3_endpoint_interrupt(dwc, &event->depevt); 247172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 247272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 247372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (event->type.type) { 247472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_EVENT_TYPE_DEV: 247572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_interrupt(dwc, &event->devt); 247672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 247772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* REVISIT what to do with Carkit and I2C events ? */ 247872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 247972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "UNKNOWN IRQ type %d\n", event->raw); 248072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 248172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 248272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 2483b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbistatic irqreturn_t dwc3_thread_interrupt(int irq, void *_dwc) 2484b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi{ 2485b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi struct dwc3 *dwc = _dwc; 2486b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi unsigned long flags; 2487b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi irqreturn_t ret = IRQ_NONE; 2488b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi int i; 2489b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi 2490b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 2491b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi 2492b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi for (i = 0; i < dwc->num_event_buffers; i++) { 2493b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi struct dwc3_event_buffer *evt; 2494b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi int left; 2495b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi 2496b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi evt = dwc->ev_buffs[i]; 2497b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi left = evt->count; 2498b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi 2499b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi if (!(evt->flags & DWC3_EVENT_PENDING)) 2500b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi continue; 2501b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi 2502b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi while (left > 0) { 2503b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi union dwc3_event event; 2504b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi 2505b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi event.raw = *(u32 *) (evt->buf + evt->lpos); 2506b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi 2507b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi dwc3_process_event_entry(dwc, &event); 2508b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi 2509b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi /* 2510b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi * FIXME we wrap around correctly to the next entry as 2511b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi * almost all entries are 4 bytes in size. There is one 2512b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi * entry which has 12 bytes which is a regular entry 2513b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi * followed by 8 bytes data. ATM I don't know how 2514b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi * things are organized if we get next to the a 2515b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi * boundary so I worry about that once we try to handle 2516b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi * that. 2517b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi */ 2518b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi evt->lpos = (evt->lpos + 4) % DWC3_EVENT_BUFFERS_SIZE; 2519b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi left -= 4; 2520b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi 2521b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi dwc3_writel(dwc->regs, DWC3_GEVNTCOUNT(i), 4); 2522b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi } 2523b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi 2524b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi evt->count = 0; 2525b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi evt->flags &= ~DWC3_EVENT_PENDING; 2526b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi ret = IRQ_HANDLED; 2527b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi } 2528b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi 2529b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 2530b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi 2531b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi return ret; 2532b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi} 2533b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi 253472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic irqreturn_t dwc3_process_event_buf(struct dwc3 *dwc, u32 buf) 253572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 253672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_event_buffer *evt; 253772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 count; 253872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 2539b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi evt = dwc->ev_buffs[buf]; 2540b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi 254172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi count = dwc3_readl(dwc->regs, DWC3_GEVNTCOUNT(buf)); 254272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi count &= DWC3_GEVNTCOUNT_MASK; 254372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!count) 254472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return IRQ_NONE; 254572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 2546b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi evt->count = count; 2547b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi evt->flags |= DWC3_EVENT_PENDING; 254872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 2549b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi return IRQ_WAKE_THREAD; 255072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 255172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 255272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic irqreturn_t dwc3_interrupt(int irq, void *_dwc) 255372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 255472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = _dwc; 255572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int i; 255672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi irqreturn_t ret = IRQ_NONE; 255772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 255872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock(&dwc->lock); 255972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 25609f622b2a407d8b34a5a7f5b4abd8b29b25cf4f32Felipe Balbi for (i = 0; i < dwc->num_event_buffers; i++) { 256172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi irqreturn_t status; 256272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 256372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi status = dwc3_process_event_buf(dwc, i); 2564b15a762f02acb4f1e695a17435f719350f9d5bc1Felipe Balbi if (status == IRQ_WAKE_THREAD) 256572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = status; 256672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 256772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 256872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock(&dwc->lock); 256972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 257072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 257172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 257272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 257372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/** 257472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * dwc3_gadget_init - Initializes gadget related registers 25751d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * @dwc: pointer to our controller context structure 257672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 257772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Returns 0 on success otherwise negative errno. 257872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 257941ac7b3ab7fe1d6175839947a877fdf95cbd2211Bill Pembertonint dwc3_gadget_init(struct dwc3 *dwc) 258072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 258172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 258272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 258372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 258472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ctrl_req = dma_alloc_coherent(dwc->dev, sizeof(*dwc->ctrl_req), 258572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi &dwc->ctrl_req_addr, GFP_KERNEL); 258672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dwc->ctrl_req) { 258772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to allocate ctrl request\n"); 258872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -ENOMEM; 258972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto err0; 259072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 259172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 259272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ep0_trb = dma_alloc_coherent(dwc->dev, sizeof(*dwc->ep0_trb), 259372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi &dwc->ep0_trb_addr, GFP_KERNEL); 259472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dwc->ep0_trb) { 259572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to allocate ep0 trb\n"); 259672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -ENOMEM; 259772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto err1; 259872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 259972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 26003ef35fafdc87b72851f7785dc5331a0f4eb1b3ceFelipe Balbi dwc->setup_buf = kzalloc(DWC3_EP0_BOUNCE_SIZE, GFP_KERNEL); 260172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dwc->setup_buf) { 260272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to allocate setup buffer\n"); 260372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -ENOMEM; 260472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto err2; 260572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 260672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 26075812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi dwc->ep0_bounce = dma_alloc_coherent(dwc->dev, 26083ef35fafdc87b72851f7785dc5331a0f4eb1b3ceFelipe Balbi DWC3_EP0_BOUNCE_SIZE, &dwc->ep0_bounce_addr, 26093ef35fafdc87b72851f7785dc5331a0f4eb1b3ceFelipe Balbi GFP_KERNEL); 26105812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi if (!dwc->ep0_bounce) { 26115812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi dev_err(dwc->dev, "failed to allocate ep0 bounce buffer\n"); 26125812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi ret = -ENOMEM; 26135812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi goto err3; 26145812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi } 26155812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi 261672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ops = &dwc3_gadget_ops; 2617d327ab5b6d660d6fe22b073b743fde1668e593bbMichal Nazarewicz dwc->gadget.max_speed = USB_SPEED_SUPER; 261872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_UNKNOWN; 2619eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dwc->gadget.sg_supported = true; 262072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.name = "dwc3-gadget"; 262172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 262272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 262372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * REVISIT: Here we should clear all pending IRQs to be 262472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * sure we're starting from a well known location. 262572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 262672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 262772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_gadget_init_endpoints(dwc); 262872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 26295812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi goto err4; 263072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 2631e6a3b5e2888b51e37c65c97dae966f793bc4806aSebastian Andrzej Siewior reg = dwc3_readl(dwc->regs, DWC3_DCFG); 2632e6a3b5e2888b51e37c65c97dae966f793bc4806aSebastian Andrzej Siewior reg |= DWC3_DCFG_LPM_CAP; 2633e6a3b5e2888b51e37c65c97dae966f793bc4806aSebastian Andrzej Siewior dwc3_writel(dwc->regs, DWC3_DCFG, reg); 2634e6a3b5e2888b51e37c65c97dae966f793bc4806aSebastian Andrzej Siewior 26358698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi /* Enable USB2 LPM and automatic phy suspend only on recent versions */ 2636802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman if (dwc->revision >= DWC3_REVISION_194A) { 2637dcae3573b98b2205961bfa5821427f5664422cd8Pratyush Anand dwc3_gadget_usb2_phy_suspend(dwc, false); 2638dcae3573b98b2205961bfa5821427f5664422cd8Pratyush Anand dwc3_gadget_usb3_phy_suspend(dwc, false); 2639802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman } 2640802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman 264172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = usb_add_gadget_udc(dwc->dev, &dwc->gadget); 264272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 264372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to register udc\n"); 26448698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi goto err5; 264572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 264672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 264772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 264872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 26495812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbierr5: 265072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_free_endpoints(dwc); 265172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 26525812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbierr4: 26533ef35fafdc87b72851f7785dc5331a0f4eb1b3ceFelipe Balbi dma_free_coherent(dwc->dev, DWC3_EP0_BOUNCE_SIZE, 26543ef35fafdc87b72851f7785dc5331a0f4eb1b3ceFelipe Balbi dwc->ep0_bounce, dwc->ep0_bounce_addr); 26555812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi 265672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbierr3: 26570fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi kfree(dwc->setup_buf); 265872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 265972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbierr2: 266072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(*dwc->ep0_trb), 266172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ep0_trb, dwc->ep0_trb_addr); 266272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 266372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbierr1: 266472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(*dwc->ctrl_req), 266572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ctrl_req, dwc->ctrl_req_addr); 266672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 266772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbierr0: 266872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 266972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 267072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 26717415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi/* -------------------------------------------------------------------------- */ 26727415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 267372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbivoid dwc3_gadget_exit(struct dwc3 *dwc) 267472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 267572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi usb_del_gadget_udc(&dwc->gadget); 267672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 267772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_free_endpoints(dwc); 267872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 26793ef35fafdc87b72851f7785dc5331a0f4eb1b3ceFelipe Balbi dma_free_coherent(dwc->dev, DWC3_EP0_BOUNCE_SIZE, 26803ef35fafdc87b72851f7785dc5331a0f4eb1b3ceFelipe Balbi dwc->ep0_bounce, dwc->ep0_bounce_addr); 26815812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi 26820fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi kfree(dwc->setup_buf); 268372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 268472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(*dwc->ep0_trb), 268572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ep0_trb, dwc->ep0_trb_addr); 268672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 268772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(*dwc->ctrl_req), 268872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ctrl_req, dwc->ctrl_req_addr); 268972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 26907415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 26917415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbiint dwc3_gadget_prepare(struct dwc3 *dwc) 26927415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi{ 26937415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi if (dwc->pullups_connected) 26947415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi dwc3_gadget_disable_irq(dwc); 26957415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 26967415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi return 0; 26977415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi} 26987415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 26997415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbivoid dwc3_gadget_complete(struct dwc3 *dwc) 27007415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi{ 27017415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi if (dwc->pullups_connected) { 27027415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi dwc3_gadget_enable_irq(dwc); 27037415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi dwc3_gadget_run_stop(dwc, true); 27047415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi } 27057415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi} 27067415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 27077415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbiint dwc3_gadget_suspend(struct dwc3 *dwc) 27087415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi{ 27097415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi __dwc3_gadget_ep_disable(dwc->eps[0]); 27107415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi __dwc3_gadget_ep_disable(dwc->eps[1]); 27117415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 27127415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi dwc->dcfg = dwc3_readl(dwc->regs, DWC3_DCFG); 27137415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 27147415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi return 0; 27157415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi} 27167415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 27177415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbiint dwc3_gadget_resume(struct dwc3 *dwc) 27187415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi{ 27197415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi struct dwc3_ep *dep; 27207415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi int ret; 27217415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 27227415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi /* Start with SuperSpeed Default */ 27237415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(512); 27247415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 27257415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi dep = dwc->eps[0]; 27267415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL, false); 27277415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi if (ret) 27287415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi goto err0; 27297415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 27307415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi dep = dwc->eps[1]; 27317415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL, false); 27327415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi if (ret) 27337415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi goto err1; 27347415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 27357415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi /* begin to receive SETUP packets */ 27367415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi dwc->ep0state = EP0_SETUP_PHASE; 27377415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi dwc3_ep0_out_start(dwc); 27387415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 27397415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCFG, dwc->dcfg); 27407415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 27417415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi return 0; 27427415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 27437415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbierr1: 27447415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi __dwc3_gadget_ep_disable(dwc->eps[0]); 27457415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi 27467415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbierr0: 27477415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi return ret; 27487415f17c9560c923ba61cd330c8dfcd5c3630b80Felipe Balbi} 2749