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 * 972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Redistribution and use in source and binary forms, with or without 1072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * modification, are permitted provided that the following conditions 1172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * are met: 1272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 1. Redistributions of source code must retain the above copyright 1372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * notice, this list of conditions, and the following disclaimer, 1472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * without modification. 1572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 2. Redistributions in binary form must reproduce the above copyright 1672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * notice, this list of conditions and the following disclaimer in the 1772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * documentation and/or other materials provided with the distribution. 1872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 3. The names of the above-listed copyright holders may not be used 1972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * to endorse or promote products derived from this software without 2072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * specific prior written permission. 2172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 2272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * ALTERNATIVELY, this software may be distributed under the terms of the 2372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * GNU General Public License ("GPL") version 2, as published by the Free 2472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Software Foundation. 2572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 2672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS 2772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 2872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 2972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 3072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 3172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 3272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 3372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 3472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 3572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 3672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 3772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 3872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 3972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/kernel.h> 4072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/delay.h> 4172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/slab.h> 4272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/spinlock.h> 4372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/platform_device.h> 4472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/pm_runtime.h> 4572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/interrupt.h> 4672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/io.h> 4772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/list.h> 4872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/dma-mapping.h> 4972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 5072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/usb/ch9.h> 5172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/usb/gadget.h> 5272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 5372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include "core.h" 5472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include "gadget.h" 5572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include "io.h" 5672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 5704a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi/** 5804a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi * dwc3_gadget_set_test_mode - Enables USB2 Test Modes 5904a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi * @dwc: pointer to our context structure 6004a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi * @mode: the mode to set (J, K SE0 NAK, Force Enable) 6104a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi * 6204a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi * Caller should take care of locking. This function will 6304a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi * return 0 on success or -EINVAL if wrong Test Selector 6404a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi * is passed 6504a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi */ 6604a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbiint dwc3_gadget_set_test_mode(struct dwc3 *dwc, int mode) 6704a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi{ 6804a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi u32 reg; 6904a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi 7004a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 7104a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi reg &= ~DWC3_DCTL_TSTCTRL_MASK; 7204a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi 7304a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi switch (mode) { 7404a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi case TEST_J: 7504a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi case TEST_K: 7604a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi case TEST_SE0_NAK: 7704a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi case TEST_PACKET: 7804a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi case TEST_FORCE_EN: 7904a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi reg |= mode << 1; 8004a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi break; 8104a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi default: 8204a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi return -EINVAL; 8304a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi } 8404a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi 8504a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 8604a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi 8704a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi return 0; 8804a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi} 8904a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi 908598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi/** 918598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi * dwc3_gadget_set_link_state - Sets USB Link to a particular State 928598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi * @dwc: pointer to our context structure 938598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi * @state: the state to put link into 948598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi * 958598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi * Caller should take care of locking. This function will 96aee63e3cb6b0396b99c6387a47cb90a7417f3957Paul Zimmerman * return 0 on success or -ETIMEDOUT. 978598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi */ 988598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbiint dwc3_gadget_set_link_state(struct dwc3 *dwc, enum dwc3_link_state state) 998598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi{ 100aee63e3cb6b0396b99c6387a47cb90a7417f3957Paul Zimmerman int retries = 10000; 1018598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi u32 reg; 1028598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi 1038598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 1048598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi reg &= ~DWC3_DCTL_ULSTCHNGREQ_MASK; 1058598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi 1068598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi /* set requested state */ 1078598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi reg |= DWC3_DCTL_ULSTCHNGREQ(state); 1088598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 1098598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi 1108598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi /* wait for a change in DSTS */ 1118598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi while (--retries) { 1128598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 1138598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi 1148598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi if (DWC3_DSTS_USBLNKST(reg) == state) 1158598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi return 0; 1168598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi 117aee63e3cb6b0396b99c6387a47cb90a7417f3957Paul Zimmerman udelay(5); 1188598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi } 1198598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi 1208598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi dev_vdbg(dwc->dev, "link state change request timed out\n"); 1218598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi 1228598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi return -ETIMEDOUT; 1238598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi} 1248598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi 125457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi/** 126457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * dwc3_gadget_resize_tx_fifos - reallocate fifo spaces for current use-case 127457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * @dwc: pointer to our context structure 128457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * 129457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * This function will a best effort FIFO allocation in order 130457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * to improve FIFO usage and throughput, while still allowing 131457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * us to enable as many endpoints as possible. 132457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * 133457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * Keep in mind that this operation will be highly dependent 134457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * on the configured size for RAM1 - which contains TxFifo -, 135457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * the amount of endpoints enabled on coreConsultant tool, and 136457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * the width of the Master Bus. 137457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * 138457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * In the ideal world, we would always be able to satisfy the 139457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * following equation: 140457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * 141457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * ((512 + 2 * MDWIDTH-Bytes) + (Number of IN Endpoints - 1) * \ 142457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * (3 * (1024 + MDWIDTH-Bytes) + MDWIDTH-Bytes)) / MDWIDTH-Bytes 143457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * 144457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * Unfortunately, due to many variables that's not always the case. 145457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi */ 146457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbiint dwc3_gadget_resize_tx_fifos(struct dwc3 *dwc) 147457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi{ 148457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi int last_fifo_depth = 0; 149457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi int ram1_depth; 150457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi int fifo_size; 151457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi int mdwidth; 152457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi int num; 153457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 154457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi if (!dwc->needs_fifo_resize) 155457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi return 0; 156457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 157457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi ram1_depth = DWC3_RAM1_DEPTH(dwc->hwparams.hwparams7); 158457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi mdwidth = DWC3_MDWIDTH(dwc->hwparams.hwparams0); 159457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 160457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi /* MDWIDTH is represented in bits, we need it in bytes */ 161457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi mdwidth >>= 3; 162457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 163457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi /* 164457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * FIXME For now we will only allocate 1 wMaxPacketSize space 165457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * for each enabled endpoint, later patches will come to 166457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * improve this algorithm so that we better use the internal 167457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * FIFO space 168457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi */ 169457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi for (num = 0; num < DWC3_ENDPOINTS_NUM; num++) { 170457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi struct dwc3_ep *dep = dwc->eps[num]; 171457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi int fifo_number = dep->number >> 1; 1722e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi int mult = 1; 173457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi int tmp; 174457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 175457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi if (!(dep->number & 1)) 176457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi continue; 177457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 178457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) 179457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi continue; 180457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 1812e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi if (usb_endpoint_xfer_bulk(dep->desc) 1822e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi || usb_endpoint_xfer_isoc(dep->desc)) 1832e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi mult = 3; 1842e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi 1852e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi /* 1862e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi * REVISIT: the following assumes we will always have enough 1872e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi * space available on the FIFO RAM for all possible use cases. 1882e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi * Make sure that's true somehow and change FIFO allocation 1892e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi * accordingly. 1902e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi * 1912e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi * If we have Bulk or Isochronous endpoints, we want 1922e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi * them to be able to be very, very fast. So we're giving 1932e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi * those endpoints a fifo_size which is enough for 3 full 1942e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi * packets 1952e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi */ 1962e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi tmp = mult * (dep->endpoint.maxpacket + mdwidth); 197457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi tmp += mdwidth; 198457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 199457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi fifo_size = DIV_ROUND_UP(tmp, mdwidth); 2002e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi 201457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi fifo_size |= (last_fifo_depth << 16); 202457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 203457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi dev_vdbg(dwc->dev, "%s: Fifo Addr %04x Size %d\n", 204457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi dep->name, last_fifo_depth, fifo_size & 0xffff); 205457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 206457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi dwc3_writel(dwc->regs, DWC3_GTXFIFOSIZ(fifo_number), 207457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi fifo_size); 208457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 209457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi last_fifo_depth += (fifo_size & 0xffff); 210457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi } 211457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 212457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi return 0; 213457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi} 214457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 21572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbivoid dwc3_gadget_giveback(struct dwc3_ep *dep, struct dwc3_request *req, 21672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int status) 21772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 21872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 21972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 22072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (req->queued) { 221eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (req->request.num_mapped_sgs) 222eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dep->busy_slot += req->request.num_mapped_sgs; 223eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi else 224eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dep->busy_slot++; 225eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi 22672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 22772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Skip LINK TRB. We can't use req->trb and check for 22872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * DWC3_TRBCTL_LINK_TRB because it points the TRB we just 22972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * completed (not the LINK TRB). 23072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 23172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (((dep->busy_slot & DWC3_TRB_MASK) == DWC3_TRB_NUM - 1) && 23272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi usb_endpoint_xfer_isoc(dep->desc)) 23372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->busy_slot++; 23472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 23572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_del(&req->list); 236eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi req->trb = NULL; 23772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 23872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (req->request.status == -EINPROGRESS) 23972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.status = status; 24072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 2410fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi usb_gadget_unmap_request(&dwc->gadget, &req->request, 2420fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi req->direction); 24372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 24472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "request %p from %s completed %d/%d ===> %d\n", 24572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req, dep->name, req->request.actual, 24672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.length, status); 24772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 24872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock(&dwc->lock); 2490fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi req->request.complete(&dep->endpoint, &req->request); 25072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock(&dwc->lock); 25172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 25272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 25372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic const char *dwc3_gadget_ep_cmd_string(u8 cmd) 25472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 25572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (cmd) { 25672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_DEPSTARTCFG: 25772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Start New Configuration"; 25872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_ENDTRANSFER: 25972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "End Transfer"; 26072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_UPDATETRANSFER: 26172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Update Transfer"; 26272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_STARTTRANSFER: 26372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Start Transfer"; 26472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_CLEARSTALL: 26572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Clear Stall"; 26672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_SETSTALL: 26772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Set Stall"; 26872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_GETSEQNUMBER: 26972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Get Data Sequence Number"; 27072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_SETTRANSFRESOURCE: 27172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Set Endpoint Transfer Resource"; 27272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_SETEPCONFIG: 27372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Set Endpoint Configuration"; 27472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 27572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "UNKNOWN command"; 27672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 27772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 27872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 27972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiint dwc3_send_gadget_ep_cmd(struct dwc3 *dwc, unsigned ep, 28072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned cmd, struct dwc3_gadget_ep_cmd_params *params) 28172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 28272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = dwc->eps[ep]; 28361d58242f634642de42d6a4098913b7254a65053Sebastian Andrzej Siewior u32 timeout = 500; 28472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 28572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 28672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s: cmd '%s' params %08x %08x %08x\n", 28772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name, 288dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi dwc3_gadget_ep_cmd_string(cmd), params->param0, 289dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params->param1, params->param2); 29072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 291dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEPCMDPAR0(ep), params->param0); 292dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEPCMDPAR1(ep), params->param1); 293dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEPCMDPAR2(ep), params->param2); 29472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 29572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEPCMD(ep), cmd | DWC3_DEPCMD_CMDACT); 29672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi do { 29772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DEPCMD(ep)); 29872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(reg & DWC3_DEPCMD_CMDACT)) { 299164f6e141ed214bda30fb219d41ec3254bd90886Felipe Balbi dev_vdbg(dwc->dev, "Command Complete --> %d\n", 300164f6e141ed214bda30fb219d41ec3254bd90886Felipe Balbi DWC3_DEPCMD_STATUS(reg)); 30172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 30272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 30372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 30472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 30572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We can't sleep here, because it is also called from 30672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * interrupt context. 30772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 30872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi timeout--; 30972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!timeout) 31072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -ETIMEDOUT; 31172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 31261d58242f634642de42d6a4098913b7254a65053Sebastian Andrzej Siewior udelay(1); 31372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } while (1); 31472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 31572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 31672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic dma_addr_t dwc3_trb_dma_offset(struct dwc3_ep *dep, 317f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi struct dwc3_trb *trb) 31872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 319c439ef87c33a1df30f528cb152151465c2529cacPaul Zimmerman u32 offset = (char *) trb - (char *) dep->trb_pool; 32072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 32172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return dep->trb_pool_dma + offset; 32272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 32372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 32472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_alloc_trb_pool(struct dwc3_ep *dep) 32572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 32672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 32772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 32872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->trb_pool) 32972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 33072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 33172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->number == 0 || dep->number == 1) 33272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 33372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 33472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->trb_pool = dma_alloc_coherent(dwc->dev, 33572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi sizeof(struct dwc3_trb) * DWC3_TRB_NUM, 33672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi &dep->trb_pool_dma, GFP_KERNEL); 33772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dep->trb_pool) { 33872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dep->dwc->dev, "failed to allocate trb pool for %s\n", 33972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 34072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -ENOMEM; 34172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 34272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 34372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 34472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 34572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 34672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_free_trb_pool(struct dwc3_ep *dep) 34772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 34872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 34972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 35072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(struct dwc3_trb) * DWC3_TRB_NUM, 35172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->trb_pool, dep->trb_pool_dma); 35272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 35372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->trb_pool = NULL; 35472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->trb_pool_dma = 0; 35572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 35672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 35772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_start_config(struct dwc3 *dwc, struct dwc3_ep *dep) 35872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 35972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 36072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 cmd; 36172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 36272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0x00, sizeof(params)); 36372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 36472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->number != 1) { 36572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd = DWC3_DEPCMD_DEPSTARTCFG; 36672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* XferRscIdx == 0 for ep0 and 2 for the remaining */ 367b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman if (dep->number > 1) { 368b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman if (dwc->start_config_issued) 369b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman return 0; 370b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman dwc->start_config_issued = true; 37172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd |= DWC3_DEPCMD_PARAM(2); 372b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman } 37372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 37472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return dwc3_send_gadget_ep_cmd(dwc, 0, cmd, ¶ms); 37572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 37672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 37772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 37872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 37972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 38072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_set_ep_config(struct dwc3 *dwc, struct dwc3_ep *dep, 381c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi const struct usb_endpoint_descriptor *desc, 382c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi const struct usb_ss_ep_comp_descriptor *comp_desc) 38372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 38472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 38572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 38672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0x00, sizeof(params)); 38772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 388dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param0 = DWC3_DEPCFG_EP_TYPE(usb_endpoint_type(desc)) 389dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi | DWC3_DEPCFG_MAX_PACKET_SIZE(usb_endpoint_maxp(desc)) 390dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi | DWC3_DEPCFG_BURST_SIZE(dep->endpoint.maxburst); 39172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 392dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param1 = DWC3_DEPCFG_XFER_COMPLETE_EN 393dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi | DWC3_DEPCFG_XFER_NOT_READY_EN; 39472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 39518b7ede5f7ee2092aedcb578d3ac30bd5d4fc23cFelipe Balbi if (usb_ss_max_streams(comp_desc) && usb_endpoint_xfer_bulk(desc)) { 396dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param1 |= DWC3_DEPCFG_STREAM_CAPABLE 397dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi | DWC3_DEPCFG_STREAM_EVENT_EN; 398879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dep->stream_capable = true; 399879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi } 400879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi 40172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (usb_endpoint_xfer_isoc(desc)) 402dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param1 |= DWC3_DEPCFG_XFER_IN_PROGRESS_EN; 40372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 40472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 40572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We are doing 1:1 mapping for endpoints, meaning 40672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Physical Endpoints 2 maps to Logical Endpoint 2 and 40772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * so on. We consider the direction bit as part of the physical 40872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * endpoint number. So USB endpoint 0x81 is 0x03. 40972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 410dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param1 |= DWC3_DEPCFG_EP_NUMBER(dep->number); 41172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 41272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 41372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We must use the lower 16 TX FIFOs even though 41472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * HW might have more 41572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 41672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->direction) 417dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param0 |= DWC3_DEPCFG_FIFO_NUMBER(dep->number >> 1); 41872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 41972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (desc->bInterval) { 420dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param1 |= DWC3_DEPCFG_BINTERVAL_M1(desc->bInterval - 1); 42172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->interval = 1 << (desc->bInterval - 1); 42272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 42372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 42472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return dwc3_send_gadget_ep_cmd(dwc, dep->number, 42572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEPCMD_SETEPCONFIG, ¶ms); 42672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 42772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 42872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_set_xfer_resource(struct dwc3 *dwc, struct dwc3_ep *dep) 42972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 43072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 43172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 43272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0x00, sizeof(params)); 43372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 434dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param0 = DWC3_DEPXFERCFG_NUM_XFER_RES(1); 43572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 43672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return dwc3_send_gadget_ep_cmd(dwc, dep->number, 43772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEPCMD_SETTRANSFRESOURCE, ¶ms); 43872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 43972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 44072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/** 44172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * __dwc3_gadget_ep_enable - Initializes a HW endpoint 44272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * @dep: endpoint to be initialized 44372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * @desc: USB Endpoint Descriptor 44472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 44572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Caller should take care of locking 44672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 44772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int __dwc3_gadget_ep_enable(struct dwc3_ep *dep, 448c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi const struct usb_endpoint_descriptor *desc, 449c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi const struct usb_ss_ep_comp_descriptor *comp_desc) 45072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 45172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 45272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 45372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret = -ENOMEM; 45472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 45572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) { 45672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_gadget_start_config(dwc, dep); 45772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 45872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 45972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 46072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 461c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi ret = dwc3_gadget_set_ep_config(dwc, dep, desc, comp_desc); 46272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 46372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 46472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 46572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) { 466f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi struct dwc3_trb *trb_st_hw; 467f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi struct dwc3_trb *trb_link; 46872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 46972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_gadget_set_xfer_resource(dwc, dep); 47072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 47172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 47272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 47372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->desc = desc; 474c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi dep->comp_desc = comp_desc; 47572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->type = usb_endpoint_type(desc); 47672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags |= DWC3_EP_ENABLED; 47772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 47872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DALEPENA); 47972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg |= DWC3_DALEPENA_EP(dep->number); 48072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DALEPENA, reg); 48172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 48272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!usb_endpoint_xfer_isoc(desc)) 48372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 48472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 48572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(&trb_link, 0, sizeof(trb_link)); 48672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 4871d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman /* Link TRB for ISOC. The HWO bit is never reset */ 48872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trb_st_hw = &dep->trb_pool[0]; 48972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 490f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb_link = &dep->trb_pool[DWC3_TRB_NUM - 1]; 49172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 492f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb_link->bpl = lower_32_bits(dwc3_trb_dma_offset(dep, trb_st_hw)); 493f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb_link->bph = upper_32_bits(dwc3_trb_dma_offset(dep, trb_st_hw)); 494f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb_link->ctrl |= DWC3_TRBCTL_LINK_TRB; 495f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb_link->ctrl |= DWC3_TRB_CTRL_HWO; 49672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 49772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 49872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 49972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 50072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 501624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewiorstatic void dwc3_stop_active_transfer(struct dwc3 *dwc, u32 epnum); 502624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewiorstatic void dwc3_remove_requests(struct dwc3 *dwc, struct dwc3_ep *dep) 50372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 50472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req; 50572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 506624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior if (!list_empty(&dep->req_queued)) 507624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior dwc3_stop_active_transfer(dwc, dep->number); 508624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior 50972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi while (!list_empty(&dep->request_list)) { 51072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req = next_request(&dep->request_list); 51172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 512624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior dwc3_gadget_giveback(dep, req, -ESHUTDOWN); 51372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 51472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 51572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 51672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/** 51772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * __dwc3_gadget_ep_disable - Disables a HW endpoint 51872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * @dep: the endpoint to disable 51972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 520624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior * This function also removes requests which are currently processed ny the 521624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior * hardware and those which are not yet scheduled. 522624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior * Caller should take care of locking. 52372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 52472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int __dwc3_gadget_ep_disable(struct dwc3_ep *dep) 52572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 52672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 52772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 52872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 529624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior dwc3_remove_requests(dwc, dep); 53072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 53172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DALEPENA); 53272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DALEPENA_EP(dep->number); 53372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DALEPENA, reg); 53472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 535879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dep->stream_capable = false; 53672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->desc = NULL; 537f9c56cdd3905c96c600456203637bd7ec8ec6383Ido Shayevitz dep->endpoint.desc = NULL; 538c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi dep->comp_desc = NULL; 53972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->type = 0; 540879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dep->flags = 0; 54172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 54272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 54372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 54472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 54572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 54672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 54772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep0_enable(struct usb_ep *ep, 54872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct usb_endpoint_descriptor *desc) 54972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 55072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EINVAL; 55172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 55272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 55372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep0_disable(struct usb_ep *ep) 55472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 55572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EINVAL; 55672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 55772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 55872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 55972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 56072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_enable(struct usb_ep *ep, 56172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct usb_endpoint_descriptor *desc) 56272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 56372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 56472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc; 56572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 56672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 56772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 56872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!ep || !desc || desc->bDescriptorType != USB_DT_ENDPOINT) { 56972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi pr_debug("dwc3: invalid parameters\n"); 57072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EINVAL; 57172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 57272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 57372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!desc->wMaxPacketSize) { 57472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi pr_debug("dwc3: missing wMaxPacketSize\n"); 57572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EINVAL; 57672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 57772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 57872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = to_dwc3_ep(ep); 57972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc = dep->dwc; 58072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 58172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (usb_endpoint_type(desc)) { 58272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_ENDPOINT_XFER_CONTROL: 58327a78d6a283d6782438f72306746afe4bf44c215Anton Tikhomirov strlcat(dep->name, "-control", sizeof(dep->name)); 58472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 58572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_ENDPOINT_XFER_ISOC: 58627a78d6a283d6782438f72306746afe4bf44c215Anton Tikhomirov strlcat(dep->name, "-isoc", sizeof(dep->name)); 58772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 58872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_ENDPOINT_XFER_BULK: 58927a78d6a283d6782438f72306746afe4bf44c215Anton Tikhomirov strlcat(dep->name, "-bulk", sizeof(dep->name)); 59072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 59172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_ENDPOINT_XFER_INT: 59227a78d6a283d6782438f72306746afe4bf44c215Anton Tikhomirov strlcat(dep->name, "-int", sizeof(dep->name)); 59372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 59472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 59572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "invalid endpoint transfer type\n"); 59672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 59772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 59872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->flags & DWC3_EP_ENABLED) { 59972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_WARN_ONCE(dwc->dev, true, "%s is already enabled\n", 60072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 60172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 60272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 60372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 60472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "Enabling %s\n", dep->name); 60572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 60672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 607c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi ret = __dwc3_gadget_ep_enable(dep, desc, ep->comp_desc); 60872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 60972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 61072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 61172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 61272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 61372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_disable(struct usb_ep *ep) 61472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 61572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 61672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc; 61772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 61872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 61972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 62072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!ep) { 62172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi pr_debug("dwc3: invalid parameters\n"); 62272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EINVAL; 62372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 62472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 62572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = to_dwc3_ep(ep); 62672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc = dep->dwc; 62772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 62872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) { 62972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_WARN_ONCE(dwc->dev, true, "%s is already disabled\n", 63072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 63172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 63272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 63372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 63472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi snprintf(dep->name, sizeof(dep->name), "ep%d%s", 63572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->number >> 1, 63672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi (dep->number & 1) ? "in" : "out"); 63772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 63872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 63972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = __dwc3_gadget_ep_disable(dep); 64072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 64172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 64272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 64372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 64472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 64572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic struct usb_request *dwc3_gadget_ep_alloc_request(struct usb_ep *ep, 64672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi gfp_t gfp_flags) 64772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 64872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req; 64972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = to_dwc3_ep(ep); 65072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 65172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 65272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req = kzalloc(sizeof(*req), gfp_flags); 65372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!req) { 65472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "not enough memory\n"); 65572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return NULL; 65672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 65772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 65872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->epnum = dep->number; 65972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->dep = dep; 66072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 66172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return &req->request; 66272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 66372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 66472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_ep_free_request(struct usb_ep *ep, 66572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct usb_request *request) 66672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 66772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req = to_dwc3_request(request); 66872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 66972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi kfree(req); 67072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 67172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 672c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi/** 673c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi * dwc3_prepare_one_trb - setup one TRB from one request 674c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi * @dep: endpoint for which this request is prepared 675c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi * @req: dwc3_request pointer 676c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi */ 67768e823e24aea5227eaf20d6435485e733109d113Felipe Balbistatic void dwc3_prepare_one_trb(struct dwc3_ep *dep, 678eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi struct dwc3_request *req, dma_addr_t dma, 679eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi unsigned length, unsigned last, unsigned chain) 680c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi{ 681eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi struct dwc3 *dwc = dep->dwc; 682f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi struct dwc3_trb *trb; 683c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 684c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi unsigned int cur_slot; 685c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 686eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dev_vdbg(dwc->dev, "%s: req %p dma %08llx length %d%s%s\n", 687eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dep->name, req, (unsigned long long) dma, 688eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi length, last ? " last" : "", 689eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi chain ? " chain" : ""); 690eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi 691f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb = &dep->trb_pool[dep->free_slot & DWC3_TRB_MASK]; 692c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi cur_slot = dep->free_slot; 693c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi dep->free_slot++; 694c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 695c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi /* Skip the LINK-TRB on ISOC */ 696c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi if (((cur_slot & DWC3_TRB_MASK) == DWC3_TRB_NUM - 1) && 697c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi usb_endpoint_xfer_isoc(dep->desc)) 69868e823e24aea5227eaf20d6435485e733109d113Felipe Balbi return; 699c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 700eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (!req->trb) { 701eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dwc3_gadget_move_request_queued(req); 702f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi req->trb = trb; 703f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi req->trb_dma = dwc3_trb_dma_offset(dep, trb); 704eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi } 705c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 706f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->size = DWC3_TRB_SIZE_LENGTH(length); 707f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->bpl = lower_32_bits(dma); 708f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->bph = upper_32_bits(dma); 709c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 710c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi switch (usb_endpoint_type(dep->desc)) { 711c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi case USB_ENDPOINT_XFER_CONTROL: 712f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->ctrl = DWC3_TRBCTL_CONTROL_SETUP; 713c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi break; 714c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 715c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi case USB_ENDPOINT_XFER_ISOC: 716f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->ctrl = DWC3_TRBCTL_ISOCHRONOUS_FIRST; 717c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 718c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi /* IOC every DWC3_TRB_NUM / 4 so we can refill */ 719c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi if (!(cur_slot % (DWC3_TRB_NUM / 4))) 720f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->ctrl |= DWC3_TRB_CTRL_IOC; 721c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi break; 722c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 723c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi case USB_ENDPOINT_XFER_BULK: 724c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi case USB_ENDPOINT_XFER_INT: 725f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->ctrl = DWC3_TRBCTL_NORMAL; 726c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi break; 727c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi default: 728c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi /* 729c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi * This is only possible with faulty memory because we 730c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi * checked it already :) 731c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi */ 732c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi BUG(); 733c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi } 734c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 735f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi if (usb_endpoint_xfer_isoc(dep->desc)) { 736f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->ctrl |= DWC3_TRB_CTRL_ISP_IMI; 737f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->ctrl |= DWC3_TRB_CTRL_CSP; 738f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi } else { 739f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi if (chain) 740f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->ctrl |= DWC3_TRB_CTRL_CHN; 741f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi 742f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi if (last) 743f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->ctrl |= DWC3_TRB_CTRL_LST; 744f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi } 745c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 746f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi if (usb_endpoint_xfer_bulk(dep->desc) && dep->stream_capable) 747f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->ctrl |= DWC3_TRB_CTRL_SID_SOFN(req->request.stream_id); 748c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 749f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->ctrl |= DWC3_TRB_CTRL_HWO; 750c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi} 751c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 75272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* 75372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * dwc3_prepare_trbs - setup TRBs from requests 75472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * @dep: endpoint for which requests are being prepared 75572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * @starting: true if the endpoint is idle and no requests are queued. 75672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 7571d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * The function goes through the requests list and sets up TRBs for the 7581d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * transfers. The function returns once there are no more TRBs available or 7591d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * it runs out of requests. 76072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 76168e823e24aea5227eaf20d6435485e733109d113Felipe Balbistatic void dwc3_prepare_trbs(struct dwc3_ep *dep, bool starting) 76272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 76368e823e24aea5227eaf20d6435485e733109d113Felipe Balbi struct dwc3_request *req, *n; 76472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 trbs_left; 7658d62cd65d74d0e241b3a152f7347bb66126b705bPaul Zimmerman u32 max; 766c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi unsigned int last_one = 0; 76772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 76872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi BUILD_BUG_ON_NOT_POWER_OF_2(DWC3_TRB_NUM); 76972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 77072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* the first request must not be queued */ 77172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trbs_left = (dep->busy_slot - dep->free_slot) & DWC3_TRB_MASK; 772c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 7738d62cd65d74d0e241b3a152f7347bb66126b705bPaul Zimmerman /* Can't wrap around on a non-isoc EP since there's no link TRB */ 7748d62cd65d74d0e241b3a152f7347bb66126b705bPaul Zimmerman if (!usb_endpoint_xfer_isoc(dep->desc)) { 7758d62cd65d74d0e241b3a152f7347bb66126b705bPaul Zimmerman max = DWC3_TRB_NUM - (dep->free_slot & DWC3_TRB_MASK); 7768d62cd65d74d0e241b3a152f7347bb66126b705bPaul Zimmerman if (trbs_left > max) 7778d62cd65d74d0e241b3a152f7347bb66126b705bPaul Zimmerman trbs_left = max; 7788d62cd65d74d0e241b3a152f7347bb66126b705bPaul Zimmerman } 7798d62cd65d74d0e241b3a152f7347bb66126b705bPaul Zimmerman 78072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 7811d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * If busy & slot are equal than it is either full or empty. If we are 7821d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * starting to process requests then we are empty. Otherwise we are 78372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * full and don't do anything 78472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 78572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!trbs_left) { 78672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!starting) 78768e823e24aea5227eaf20d6435485e733109d113Felipe Balbi return; 78872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trbs_left = DWC3_TRB_NUM; 78972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 79072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * In case we start from scratch, we queue the ISOC requests 79172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * starting from slot 1. This is done because we use ring 79272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * buffer and have no LST bit to stop us. Instead, we place 7931d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * IOC bit every TRB_NUM/4. We try to avoid having an interrupt 79472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * after the first request so we start at slot 1 and have 79572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 7 requests proceed before we hit the first IOC. 79672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Other transfer types don't use the ring buffer and are 79772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * processed from the first TRB until the last one. Since we 79872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * don't wrap around we have to start at the beginning. 79972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 80072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (usb_endpoint_xfer_isoc(dep->desc)) { 80172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->busy_slot = 1; 80272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->free_slot = 1; 80372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 80472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->busy_slot = 0; 80572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->free_slot = 0; 80672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 80772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 80872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 80972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* The last TRB is a link TRB, not used for xfer */ 81072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if ((trbs_left <= 1) && usb_endpoint_xfer_isoc(dep->desc)) 81168e823e24aea5227eaf20d6435485e733109d113Felipe Balbi return; 81272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 81372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_for_each_entry_safe(req, n, &dep->request_list, list) { 814eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi unsigned length; 815eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dma_addr_t dma; 81672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 817eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (req->request.num_mapped_sgs > 0) { 818eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi struct usb_request *request = &req->request; 819eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi struct scatterlist *sg = request->sg; 820eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi struct scatterlist *s; 821eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi int i; 82272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 823eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi for_each_sg(sg, s, request->num_mapped_sgs, i) { 824eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi unsigned chain = true; 82572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 826eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi length = sg_dma_len(s); 827eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dma = sg_dma_address(s); 82872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 8291d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman if (i == (request->num_mapped_sgs - 1) || 8301d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman sg_is_last(s)) { 831eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi last_one = true; 832eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi chain = false; 833eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi } 83472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 835eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi trbs_left--; 836eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (!trbs_left) 837eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi last_one = true; 83872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 839eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (last_one) 840eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi chain = false; 84172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 842eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dwc3_prepare_one_trb(dep, req, dma, length, 843eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi last_one, chain); 84472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 845eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (last_one) 846eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi break; 847eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi } 84872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 849eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dma = req->request.dma; 850eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi length = req->request.length; 851eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi trbs_left--; 85272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 853eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (!trbs_left) 854eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi last_one = 1; 855879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi 856eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi /* Is this the last request? */ 857eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (list_is_last(&req->list, &dep->request_list)) 858eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi last_one = 1; 85972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 860eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dwc3_prepare_one_trb(dep, req, dma, length, 861eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi last_one, false); 86272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 863eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (last_one) 864eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi break; 86572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 86672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 86772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 86872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 86972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int __dwc3_gadget_kick_transfer(struct dwc3_ep *dep, u16 cmd_param, 87072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int start_new) 87172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 87272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 87372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req; 87472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 87572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 87672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 cmd; 87772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 87872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (start_new && (dep->flags & DWC3_EP_BUSY)) { 87972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s: endpoint busy\n", dep->name); 88072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EBUSY; 88172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 88272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags &= ~DWC3_EP_PENDING_REQUEST; 88372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 88472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 88572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * If we are getting here after a short-out-packet we don't enqueue any 88672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * new requests as we try to set the IOC bit only on the last request. 88772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 88872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (start_new) { 88972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (list_empty(&dep->req_queued)) 89072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_prepare_trbs(dep, start_new); 89172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 89272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* req points to the first request which will be sent */ 89372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req = next_request(&dep->req_queued); 89472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 89568e823e24aea5227eaf20d6435485e733109d113Felipe Balbi dwc3_prepare_trbs(dep, start_new); 89668e823e24aea5227eaf20d6435485e733109d113Felipe Balbi 89772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 8981d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * req points to the first request where HWO changed from 0 to 1 89972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 90068e823e24aea5227eaf20d6435485e733109d113Felipe Balbi req = next_request(&dep->req_queued); 90172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 90272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!req) { 90372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags |= DWC3_EP_PENDING_REQUEST; 90472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 90572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 90672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 90772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0, sizeof(params)); 908dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param0 = upper_32_bits(req->trb_dma); 909dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param1 = lower_32_bits(req->trb_dma); 91072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 91172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (start_new) 91272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd = DWC3_DEPCMD_STARTTRANSFER; 91372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi else 91472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd = DWC3_DEPCMD_UPDATETRANSFER; 91572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 91672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd |= DWC3_DEPCMD_PARAM(cmd_param); 91772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, cmd, ¶ms); 91872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret < 0) { 91972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "failed to send STARTTRANSFER command\n"); 92072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 92172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 92272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * FIXME we need to iterate over the list of requests 92372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * here and stop, unmap, free and del each of the linked 9241d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * requests instead of what we do now. 92572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 9260fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi usb_gadget_unmap_request(&dwc->gadget, &req->request, 9270fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi req->direction); 92872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_del(&req->list); 92972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 93072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 93172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 93272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags |= DWC3_EP_BUSY; 93372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->res_trans_idx = dwc3_gadget_ep_get_transfer_index(dwc, 93472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->number); 93525b8ff68bf1d4954d4a9dcb4862c6b6a53cb09e2Felipe Balbi 93625b8ff68bf1d4954d4a9dcb4862c6b6a53cb09e2Felipe Balbi WARN_ON_ONCE(!dep->res_trans_idx); 93725b8ff68bf1d4954d4a9dcb4862c6b6a53cb09e2Felipe Balbi 93872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 93972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 94072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 94172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int __dwc3_gadget_ep_queue(struct dwc3_ep *dep, struct dwc3_request *req) 94272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 9430fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi struct dwc3 *dwc = dep->dwc; 9440fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi int ret; 9450fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi 94672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.actual = 0; 94772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.status = -EINPROGRESS; 94872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->direction = dep->direction; 94972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->epnum = dep->number; 95072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 95172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 95272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We only add to our list of requests now and 95372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * start consuming the list once we get XferNotReady 95472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * IRQ. 95572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 95672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * That way, we avoid doing anything that we don't need 95772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * to do now and defer it until the point we receive a 95872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * particular token from the Host side. 95972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 96072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * This will also avoid Host cancelling URBs due to too 9611d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * many NAKs. 96272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 9630fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi ret = usb_gadget_map_request(&dwc->gadget, &req->request, 9640fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi dep->direction); 9650fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi if (ret) 9660fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi return ret; 9670fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi 96872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_add_tail(&req->list, &dep->request_list); 96972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 97072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 97172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * There is one special case: XferNotReady with 97272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * empty list of requests. We need to kick the 97372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * transfer here in that situation, otherwise 97472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * we will be NAKing forever. 97572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 97672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * If we get XferNotReady before gadget driver 97772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * has a chance to queue a request, we will ACK 97872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * the IRQ but won't be able to receive the data 97972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * until the next request is queued. The following 98072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * code is handling exactly that. 98172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 98272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->flags & DWC3_EP_PENDING_REQUEST) { 98372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 98472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int start_trans; 98572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 98672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi start_trans = 1; 9877b7dd0253cd50fdc413b4ec199f1f3af08b7ba0dFelipe Balbi if (usb_endpoint_xfer_isoc(dep->desc) && 9881d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman (dep->flags & DWC3_EP_BUSY)) 98972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi start_trans = 0; 99072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 9911d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman ret = __dwc3_gadget_kick_transfer(dep, 0, start_trans); 99272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret && ret != -EBUSY) { 99372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 99472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 99572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "%s: failed to kick transfers\n", 99672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 99772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 99872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi }; 99972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 100072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 100172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 100272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 100372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_queue(struct usb_ep *ep, struct usb_request *request, 100472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi gfp_t gfp_flags) 100572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 100672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req = to_dwc3_request(request); 100772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = to_dwc3_ep(ep); 100872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 100972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 101072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 101172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 101272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 101372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 101472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dep->desc) { 101572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "trying to queue request %p to disabled %s\n", 101672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi request, ep->name); 101772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -ESHUTDOWN; 101872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 101972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 102072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "queing request %p to %s length %d\n", 102172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi request, ep->name, request->length); 102272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 102372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 102472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = __dwc3_gadget_ep_queue(dep, req); 102572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 102672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 102772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 102872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 102972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 103072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_dequeue(struct usb_ep *ep, 103172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct usb_request *request) 103272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 103372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req = to_dwc3_request(request); 103472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *r = NULL; 103572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 103672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = to_dwc3_ep(ep); 103772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 103872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 103972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 104072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret = 0; 104172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 104272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 104372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 104472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_for_each_entry(r, &dep->request_list, list) { 104572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (r == req) 104672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 104772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 104872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 104972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (r != req) { 105072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_for_each_entry(r, &dep->req_queued, list) { 105172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (r == req) 105272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 105372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 105472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (r == req) { 105572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* wait until it is processed */ 105672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_stop_active_transfer(dwc, dep->number); 105772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto out0; 105872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 105972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "request %p was not queued to %s\n", 106072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi request, ep->name); 106172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EINVAL; 106272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto out0; 106372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 106472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 106572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* giveback the request */ 106672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_giveback(dep, req, -ECONNRESET); 106772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 106872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiout0: 106972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 107072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 107172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 107272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 107372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 107472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiint __dwc3_gadget_ep_set_halt(struct dwc3_ep *dep, int value) 107572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 107672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 107772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 107872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 107972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 108072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0x00, sizeof(params)); 108172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 108272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (value) { 10830b7836a9eb32f626ffd3fe3045e8c618cb8ed965Felipe Balbi if (dep->number == 0 || dep->number == 1) { 10840b7836a9eb32f626ffd3fe3045e8c618cb8ed965Felipe Balbi /* 10850b7836a9eb32f626ffd3fe3045e8c618cb8ed965Felipe Balbi * Whenever EP0 is stalled, we will restart 10860b7836a9eb32f626ffd3fe3045e8c618cb8ed965Felipe Balbi * the state machine, thus moving back to 10870b7836a9eb32f626ffd3fe3045e8c618cb8ed965Felipe Balbi * Setup Phase 10880b7836a9eb32f626ffd3fe3045e8c618cb8ed965Felipe Balbi */ 10890b7836a9eb32f626ffd3fe3045e8c618cb8ed965Felipe Balbi dwc->ep0state = EP0_SETUP_PHASE; 10900b7836a9eb32f626ffd3fe3045e8c618cb8ed965Felipe Balbi } 109172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 109272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, 109372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEPCMD_SETSTALL, ¶ms); 109472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 109572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to %s STALL on %s\n", 109672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi value ? "set" : "clear", 109772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 109872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi else 109972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags |= DWC3_EP_STALL; 110072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 11015275455a6e6ae6b57303834b0afd267bb9657ffcPaul Zimmerman if (dep->flags & DWC3_EP_WEDGE) 11025275455a6e6ae6b57303834b0afd267bb9657ffcPaul Zimmerman return 0; 11035275455a6e6ae6b57303834b0afd267bb9657ffcPaul Zimmerman 110472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, 110572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEPCMD_CLEARSTALL, ¶ms); 110672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 110772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to %s STALL on %s\n", 110872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi value ? "set" : "clear", 110972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 111072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi else 111172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags &= ~DWC3_EP_STALL; 111272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 11135275455a6e6ae6b57303834b0afd267bb9657ffcPaul Zimmerman 111472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 111572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 111672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 111772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_set_halt(struct usb_ep *ep, int value) 111872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 111972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = to_dwc3_ep(ep); 112072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 112172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 112272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 112372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 112472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 112572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 112672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 112772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 112872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (usb_endpoint_xfer_isoc(dep->desc)) { 112972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "%s is of Isochronous type\n", dep->name); 113072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EINVAL; 113172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto out; 113272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 113372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 113472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = __dwc3_gadget_ep_set_halt(dep, value); 113572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiout: 113672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 113772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 113872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 113972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 114072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 114172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_set_wedge(struct usb_ep *ep) 114272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 114372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = to_dwc3_ep(ep); 1144249a456930cd2df29d085fb738b0e8f4bc1680cfPaul Zimmerman struct dwc3 *dwc = dep->dwc; 1145249a456930cd2df29d085fb738b0e8f4bc1680cfPaul Zimmerman unsigned long flags; 114672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1147249a456930cd2df29d085fb738b0e8f4bc1680cfPaul Zimmerman spin_lock_irqsave(&dwc->lock, flags); 114872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags |= DWC3_EP_WEDGE; 1149249a456930cd2df29d085fb738b0e8f4bc1680cfPaul Zimmerman spin_unlock_irqrestore(&dwc->lock, flags); 115072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 11515275455a6e6ae6b57303834b0afd267bb9657ffcPaul Zimmerman return dwc3_gadget_ep_set_halt(ep, 1); 115272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 115372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 115472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 115572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 115672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic struct usb_endpoint_descriptor dwc3_gadget_ep0_desc = { 115772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .bLength = USB_DT_ENDPOINT_SIZE, 115872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .bDescriptorType = USB_DT_ENDPOINT, 115972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .bmAttributes = USB_ENDPOINT_XFER_CONTROL, 116072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi}; 116172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 116272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic const struct usb_ep_ops dwc3_gadget_ep0_ops = { 116372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .enable = dwc3_gadget_ep0_enable, 116472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .disable = dwc3_gadget_ep0_disable, 116572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .alloc_request = dwc3_gadget_ep_alloc_request, 116672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .free_request = dwc3_gadget_ep_free_request, 116772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .queue = dwc3_gadget_ep0_queue, 116872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .dequeue = dwc3_gadget_ep_dequeue, 116972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .set_halt = dwc3_gadget_ep_set_halt, 117072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .set_wedge = dwc3_gadget_ep_set_wedge, 117172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi}; 117272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 117372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic const struct usb_ep_ops dwc3_gadget_ep_ops = { 117472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .enable = dwc3_gadget_ep_enable, 117572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .disable = dwc3_gadget_ep_disable, 117672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .alloc_request = dwc3_gadget_ep_alloc_request, 117772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .free_request = dwc3_gadget_ep_free_request, 117872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .queue = dwc3_gadget_ep_queue, 117972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .dequeue = dwc3_gadget_ep_dequeue, 118072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .set_halt = dwc3_gadget_ep_set_halt, 118172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .set_wedge = dwc3_gadget_ep_set_wedge, 118272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi}; 118372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 118472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 118572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 118672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_get_frame(struct usb_gadget *g) 118772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 118872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 118972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 119072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 119172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 119272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return DWC3_DSTS_SOFFN(reg); 119372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 119472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 119572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_wakeup(struct usb_gadget *g) 119672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 119772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 119872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 119972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long timeout; 120072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 120172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 120272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 120372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 120472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret = 0; 120572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 120672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 link_state; 120772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 speed; 120872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 120972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 121072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 121172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 121272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * According to the Databook Remote wakeup request should 121372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * be issued only when the device is in early suspend state. 121472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 121572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We can check that via USB Link State bits in DSTS register. 121672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 121772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 121872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 121972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi speed = reg & DWC3_DSTS_CONNECTSPD; 122072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (speed == DWC3_DSTS_SUPERSPEED) { 122172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "no wakeup on SuperSpeed\n"); 122272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EINVAL; 122372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto out; 122472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 122572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 122672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi link_state = DWC3_DSTS_USBLNKST(reg); 122772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 122872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (link_state) { 122972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_LINK_STATE_RX_DET: /* in HS, means Early Suspend */ 123072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_LINK_STATE_U3: /* in HS, means SUSPEND */ 123172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 123272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 123372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "can't wakeup from link state %d\n", 123472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi link_state); 123572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EINVAL; 123672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto out; 123772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 123872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 12398598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi ret = dwc3_gadget_set_link_state(dwc, DWC3_LINK_STATE_RECOV); 12408598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi if (ret < 0) { 12418598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi dev_err(dwc->dev, "failed to put link in Recovery\n"); 12428598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi goto out; 12438598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi } 124472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 124572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* write zeroes to Link Change Request */ 124672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DCTL_ULSTCHNGREQ_MASK; 124772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 124872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 12491d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman /* poll until Link State changes to ON */ 125072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi timeout = jiffies + msecs_to_jiffies(100); 125172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 12521d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman while (!time_after(jiffies, timeout)) { 125372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 125472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 125572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* in HS, means ON */ 125672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (DWC3_DSTS_USBLNKST(reg) == DWC3_LINK_STATE_U0) 125772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 125872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 125972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 126072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (DWC3_DSTS_USBLNKST(reg) != DWC3_LINK_STATE_U0) { 126172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to send remote wakeup\n"); 126272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EINVAL; 126372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 126472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 126572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiout: 126672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 126772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 126872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 126972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 127072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 127172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_set_selfpowered(struct usb_gadget *g, 127272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int is_selfpowered) 127372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 127472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 1275249a456930cd2df29d085fb738b0e8f4bc1680cfPaul Zimmerman unsigned long flags; 127672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1277249a456930cd2df29d085fb738b0e8f4bc1680cfPaul Zimmerman spin_lock_irqsave(&dwc->lock, flags); 127872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->is_selfpowered = !!is_selfpowered; 1279249a456930cd2df29d085fb738b0e8f4bc1680cfPaul Zimmerman spin_unlock_irqrestore(&dwc->lock, flags); 128072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 128172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 128272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 128372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 128472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_run_stop(struct dwc3 *dwc, int is_on) 128572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 128672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 128761d58242f634642de42d6a4098913b7254a65053Sebastian Andrzej Siewior u32 timeout = 500; 128872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 128972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 12908db7ed15f2557e26371e4b2d98fee290d992b715Felipe Balbi if (is_on) { 12918db7ed15f2557e26371e4b2d98fee290d992b715Felipe Balbi reg &= ~DWC3_DCTL_TRGTULST_MASK; 12928db7ed15f2557e26371e4b2d98fee290d992b715Felipe Balbi reg |= (DWC3_DCTL_RUN_STOP 12938db7ed15f2557e26371e4b2d98fee290d992b715Felipe Balbi | DWC3_DCTL_TRGTULST_RX_DET); 12948db7ed15f2557e26371e4b2d98fee290d992b715Felipe Balbi } else { 129572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DCTL_RUN_STOP; 12968db7ed15f2557e26371e4b2d98fee290d992b715Felipe Balbi } 129772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 129872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 129972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 130072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi do { 130172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 130272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (is_on) { 130372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(reg & DWC3_DSTS_DEVCTRLHLT)) 130472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 130572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 130672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (reg & DWC3_DSTS_DEVCTRLHLT) 130772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 130872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 130972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi timeout--; 131072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!timeout) 131172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 131261d58242f634642de42d6a4098913b7254a65053Sebastian Andrzej Siewior udelay(1); 131372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } while (1); 131472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 131572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "gadget %s data soft-%s\n", 131672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver 131772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ? dwc->gadget_driver->function : "no-function", 131872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi is_on ? "connect" : "disconnect"); 131972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 132072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 132172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_pullup(struct usb_gadget *g, int is_on) 132272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 132372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 132472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 132572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 132672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi is_on = !!is_on; 132772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 132872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 132972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_run_stop(dwc, is_on); 133072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 133172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 133272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 133372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 133472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 133572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_start(struct usb_gadget *g, 133672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct usb_gadget_driver *driver) 133772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 133872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 133972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 134072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 134172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret = 0; 134272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 134372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 134472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 134572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 134672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dwc->gadget_driver) { 134772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "%s is already bound to %s\n", 134872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.name, 134972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver->driver.name); 135072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EBUSY; 135172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto err0; 135272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 135372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 135472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver = driver; 135572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.dev.driver = &driver->driver; 135672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 135772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCFG); 135872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~(DWC3_DCFG_SPEED_MASK); 13596c167fc9b0c23ead791edb94cf4debb6b8e534b5Felipe Balbi reg |= dwc->maximum_speed; 136072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCFG, reg); 136172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1362b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman dwc->start_config_issued = false; 1363b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman 136472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* Start with SuperSpeed Default */ 136572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(512); 136672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 136772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[0]; 1368c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL); 136972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 137072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to enable %s\n", dep->name); 137172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto err0; 137272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 137372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 137472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[1]; 1375c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL); 137672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 137772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to enable %s\n", dep->name); 137872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto err1; 137972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 138072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 138172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* begin to receive SETUP packets */ 1382c7fcdeb2627c46b7ec3f0bcb2054b10405f9a70eFelipe Balbi dwc->ep0state = EP0_SETUP_PHASE; 138372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_ep0_out_start(dwc); 138472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 138572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 138672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 138772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 138872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 138972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbierr1: 139072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi __dwc3_gadget_ep_disable(dwc->eps[0]); 139172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 139272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbierr0: 139372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 139472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 139572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 139672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 139772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 139872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_stop(struct usb_gadget *g, 139972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct usb_gadget_driver *driver) 140072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 140172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 140272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 140372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 140472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 140572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 140672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi __dwc3_gadget_ep_disable(dwc->eps[0]); 140772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi __dwc3_gadget_ep_disable(dwc->eps[1]); 140872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 140972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver = NULL; 141072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.dev.driver = NULL; 141172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 141272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 141372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 141472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 141572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 141672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic const struct usb_gadget_ops dwc3_gadget_ops = { 141772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .get_frame = dwc3_gadget_get_frame, 141872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .wakeup = dwc3_gadget_wakeup, 141972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .set_selfpowered = dwc3_gadget_set_selfpowered, 142072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .pullup = dwc3_gadget_pullup, 142172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .udc_start = dwc3_gadget_start, 142272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .udc_stop = dwc3_gadget_stop, 142372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi}; 142472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 142572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 142672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 142772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int __devinit dwc3_gadget_init_endpoints(struct dwc3 *dwc) 142872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 142972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 143072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 epnum; 143172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 143272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi INIT_LIST_HEAD(&dwc->gadget.ep_list); 143372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 143472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi for (epnum = 0; epnum < DWC3_ENDPOINTS_NUM; epnum++) { 143572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = kzalloc(sizeof(*dep), GFP_KERNEL); 143672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dep) { 143772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "can't allocate endpoint %d\n", 143872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi epnum); 143972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -ENOMEM; 144072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 144172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 144272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->dwc = dwc; 144372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->number = epnum; 144472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->eps[epnum] = dep; 144572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 144672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi snprintf(dep->name, sizeof(dep->name), "ep%d%s", epnum >> 1, 144772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi (epnum & 1) ? "in" : "out"); 144872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->endpoint.name = dep->name; 144972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->direction = (epnum & 1); 145072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 145172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (epnum == 0 || epnum == 1) { 145272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->endpoint.maxpacket = 512; 145372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->endpoint.ops = &dwc3_gadget_ep0_ops; 145472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!epnum) 145572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ep0 = &dep->endpoint; 145672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 145772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 145872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 145972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->endpoint.maxpacket = 1024; 146012d36c16bde3ee0643d705caa87723de536dbe49Sebastian Andrzej Siewior dep->endpoint.max_streams = 15; 146172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->endpoint.ops = &dwc3_gadget_ep_ops; 146272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_add_tail(&dep->endpoint.ep_list, 146372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi &dwc->gadget.ep_list); 146472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 146572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_alloc_trb_pool(dep); 146625b8ff68bf1d4954d4a9dcb4862c6b6a53cb09e2Felipe Balbi if (ret) 146772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 146872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 146925b8ff68bf1d4954d4a9dcb4862c6b6a53cb09e2Felipe Balbi 147072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi INIT_LIST_HEAD(&dep->request_list); 147172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi INIT_LIST_HEAD(&dep->req_queued); 147272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 147372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 147472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 147572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 147672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 147772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_free_endpoints(struct dwc3 *dwc) 147872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 147972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 148072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 epnum; 148172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 148272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi for (epnum = 0; epnum < DWC3_ENDPOINTS_NUM; epnum++) { 148372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[epnum]; 148472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_free_trb_pool(dep); 148572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 148672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (epnum != 0 && epnum != 1) 148772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_del(&dep->endpoint.ep_list); 148872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 148972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi kfree(dep); 149072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 149172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 149272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 149372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_release(struct device *dev) 149472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 149572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dev, "%s\n", __func__); 149672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 149772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 149872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 149972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_cleanup_done_reqs(struct dwc3 *dwc, struct dwc3_ep *dep, 150072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct dwc3_event_depevt *event, int status) 150172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 150272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req; 1503f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi struct dwc3_trb *trb; 150472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned int count; 150572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned int s_pkt = 0; 150672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 150772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi do { 150872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req = next_request(&dep->req_queued); 1509d39ee7be2aaf0a53d7b5f43c13571bac95f7cc0cSebastian Andrzej Siewior if (!req) { 1510d39ee7be2aaf0a53d7b5f43c13571bac95f7cc0cSebastian Andrzej Siewior WARN_ON_ONCE(1); 1511d39ee7be2aaf0a53d7b5f43c13571bac95f7cc0cSebastian Andrzej Siewior return 1; 1512d39ee7be2aaf0a53d7b5f43c13571bac95f7cc0cSebastian Andrzej Siewior } 151372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1514f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb = req->trb; 151572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1516f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi if ((trb->ctrl & DWC3_TRB_CTRL_HWO) && status != -ESHUTDOWN) 15170d2f4758530d1598087d1d2f3e75b4f7d17fc6c7Sebastian Andrzej Siewior /* 15180d2f4758530d1598087d1d2f3e75b4f7d17fc6c7Sebastian Andrzej Siewior * We continue despite the error. There is not much we 15191d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * can do. If we don't clean it up we loop forever. If 15201d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * we skip the TRB then it gets overwritten after a 15211d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * while since we use them in a ring buffer. A BUG() 15221d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * would help. Lets hope that if this occurs, someone 15230d2f4758530d1598087d1d2f3e75b4f7d17fc6c7Sebastian Andrzej Siewior * fixes the root cause instead of looking away :) 15240d2f4758530d1598087d1d2f3e75b4f7d17fc6c7Sebastian Andrzej Siewior */ 152572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "%s's TRB (%p) still owned by HW\n", 152672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name, req->trb); 1527f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi count = trb->size & DWC3_TRB_SIZE_MASK; 152872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 152972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->direction) { 153072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (count) { 153172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "incomplete IN transfer %s\n", 153272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 153372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi status = -ECONNRESET; 153472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 153572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 153672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (count && (event->status & DEPEVT_STATUS_SHORT)) 153772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi s_pkt = 1; 153872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 153972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 154072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 154172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We assume here we will always receive the entire data block 154272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * which we should receive. Meaning, if we program RX to 154372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * receive 4K but we receive only 2K, we assume that's all we 154472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * should receive and we simply bounce the request back to the 154572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * gadget driver for further processing. 154672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 154772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.actual += req->request.length - count; 154872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_giveback(dep, req, status); 154972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (s_pkt) 155072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 1551f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi if ((event->status & DEPEVT_STATUS_LST) && 1552f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi (trb->ctrl & DWC3_TRB_CTRL_LST)) 155372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 1554f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi if ((event->status & DEPEVT_STATUS_IOC) && 1555f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi (trb->ctrl & DWC3_TRB_CTRL_IOC)) 155672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 155772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } while (1); 155872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1559f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi if ((event->status & DEPEVT_STATUS_IOC) && 1560f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi (trb->ctrl & DWC3_TRB_CTRL_IOC)) 156172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 156272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 1; 156372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 156472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 156572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_endpoint_transfer_complete(struct dwc3 *dwc, 156672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep, const struct dwc3_event_depevt *event, 156772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int start_new) 156872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 156972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned status = 0; 157072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int clean_busy; 157172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 157272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (event->status & DEPEVT_STATUS_BUSERR) 157372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi status = -ECONNRESET; 157472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 15751d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman clean_busy = dwc3_cleanup_done_reqs(dwc, dep, event, status); 1576c2df85ca31645ed3c68c56bd30a3673e034224f1Paul Zimmerman if (clean_busy) 157772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags &= ~DWC3_EP_BUSY; 1578fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1579fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi /* 1580fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * WORKAROUND: This is the 2nd half of U1/U2 -> U0 workaround. 1581fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * See dwc3_gadget_linksts_change_interrupt() for 1st half. 1582fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi */ 1583fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi if (dwc->revision < DWC3_REVISION_183A) { 1584fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi u32 reg; 1585fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi int i; 1586fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1587fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi for (i = 0; i < DWC3_ENDPOINTS_NUM; i++) { 1588fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi struct dwc3_ep *dep = dwc->eps[i]; 1589fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1590fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) 1591fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi continue; 1592fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1593fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi if (!list_empty(&dep->req_queued)) 1594fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi return; 1595fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi } 1596fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1597fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 1598fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi reg |= dwc->u1u2; 1599fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 1600fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1601fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi dwc->u1u2 = 0; 1602fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi } 160372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 160472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 160572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_start_isoc(struct dwc3 *dwc, 160672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep, const struct dwc3_event_depevt *event) 160772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 16089bafa56c7cee5c6fa68de5924220abb220c7e229Paul Zimmerman u32 uf, mask; 160972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 161072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (list_empty(&dep->request_list)) { 161172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "ISOC ep %s run out for requests.\n", 161272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 161372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 161472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 161572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 16169bafa56c7cee5c6fa68de5924220abb220c7e229Paul Zimmerman mask = ~(dep->interval - 1); 16179bafa56c7cee5c6fa68de5924220abb220c7e229Paul Zimmerman uf = event->parameters & mask; 16189bafa56c7cee5c6fa68de5924220abb220c7e229Paul Zimmerman /* 4 micro frames in the future */ 16199bafa56c7cee5c6fa68de5924220abb220c7e229Paul Zimmerman uf += dep->interval * 4; 162072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 162172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi __dwc3_gadget_kick_transfer(dep, uf, 1); 162272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 162372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 162472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_process_ep_cmd_complete(struct dwc3_ep *dep, 162572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct dwc3_event_depevt *event) 162672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 162772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 162872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_event_depevt mod_ev = *event; 162972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 163072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 16311d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * We were asked to remove one request. It is possible that this 16321d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * request and a few others were started together and have the same 163372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * transfer index. Since we stopped the complete endpoint we don't 163472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * know how many requests were already completed (and not yet) 163572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * reported and how could be done (later). We purge them all until 163672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * the end of the list. 163772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 163872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi mod_ev.status = DEPEVT_STATUS_LST; 163972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_cleanup_done_reqs(dwc, dep, &mod_ev, -ESHUTDOWN); 164072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags &= ~DWC3_EP_BUSY; 16411d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman /* pending requests are ignored and are queued on XferNotReady */ 164272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 164372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 164472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_ep_cmd_compl(struct dwc3_ep *dep, 164572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct dwc3_event_depevt *event) 164672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 164772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 param = event->parameters; 164872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 cmd_type = (param >> 8) & ((1 << 5) - 1); 164972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 165072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (cmd_type) { 165172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_ENDTRANSFER: 165272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_process_ep_cmd_complete(dep, event); 165372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 165472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_STARTTRANSFER: 165572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->res_trans_idx = param & 0x7f; 165672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 165772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 165872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi printk(KERN_ERR "%s() unknown /unexpected type: %d\n", 165972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi __func__, cmd_type); 166072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 166172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi }; 166272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 166372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 166472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_endpoint_interrupt(struct dwc3 *dwc, 166572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct dwc3_event_depevt *event) 166672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 166772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 166872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 epnum = event->endpoint_number; 166972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 167072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[epnum]; 167172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 167272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s: %s\n", dep->name, 167372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_ep_event_string(event->endpoint_event)); 167472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 167572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (epnum == 0 || epnum == 1) { 167672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_ep0_interrupt(dwc, event); 167772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 167872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 167972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 168072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (event->endpoint_event) { 168172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPEVT_XFERCOMPLETE: 1682c2df85ca31645ed3c68c56bd30a3673e034224f1Paul Zimmerman dep->res_trans_idx = 0; 1683c2df85ca31645ed3c68c56bd30a3673e034224f1Paul Zimmerman 168472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (usb_endpoint_xfer_isoc(dep->desc)) { 168572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "%s is an Isochronous endpoint\n", 168672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 168772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 168872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 168972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 169072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_endpoint_transfer_complete(dwc, dep, event, 1); 169172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 169272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPEVT_XFERINPROGRESS: 169372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!usb_endpoint_xfer_isoc(dep->desc)) { 169472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "%s is not an Isochronous endpoint\n", 169572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 169672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 169772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 169872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 169972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_endpoint_transfer_complete(dwc, dep, event, 0); 170072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 170172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPEVT_XFERNOTREADY: 170272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (usb_endpoint_xfer_isoc(dep->desc)) { 170372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_start_isoc(dwc, dep, event); 170472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 170572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 170672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 170772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s: reason %s\n", 170840aa41fba348bc5bd19ff5bcf2b03d67bb01d1ceFelipe Balbi dep->name, event->status & 170940aa41fba348bc5bd19ff5bcf2b03d67bb01d1ceFelipe Balbi DEPEVT_STATUS_TRANSFER_ACTIVE 171072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ? "Transfer Active" 171172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi : "Transfer Not Active"); 171272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 171372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = __dwc3_gadget_kick_transfer(dep, 0, 1); 171472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!ret || ret == -EBUSY) 171572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 171672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 171772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "%s: failed to kick transfers\n", 171872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 171972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 172072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 172172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 1722879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi case DWC3_DEPEVT_STREAMEVT: 1723879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi if (!usb_endpoint_xfer_bulk(dep->desc)) { 1724879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dev_err(dwc->dev, "Stream event for non-Bulk %s\n", 1725879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dep->name); 1726879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi return; 1727879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi } 1728879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi 1729879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi switch (event->status) { 1730879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi case DEPEVT_STREAMEVT_FOUND: 1731879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dev_vdbg(dwc->dev, "Stream %d found and started\n", 1732879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi event->parameters); 1733879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi 1734879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi break; 1735879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi case DEPEVT_STREAMEVT_NOTFOUND: 1736879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi /* FALLTHROUGH */ 1737879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi default: 1738879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dev_dbg(dwc->dev, "Couldn't find suitable stream\n"); 1739879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi } 1740879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi break; 174172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPEVT_RXTXFIFOEVT: 174272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "%s FIFO Overrun\n", dep->name); 174372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 174472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPEVT_EPCMDCMPLT: 174572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_ep_cmd_compl(dep, event); 174672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 174772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 174872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 174972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 175072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_disconnect_gadget(struct dwc3 *dwc) 175172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 175272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dwc->gadget_driver && dwc->gadget_driver->disconnect) { 175372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock(&dwc->lock); 175472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver->disconnect(&dwc->gadget); 175572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock(&dwc->lock); 175672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 175772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 175872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 175972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_stop_active_transfer(struct dwc3 *dwc, u32 epnum) 176072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 176172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 176272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 176372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 cmd; 176472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 176572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 176672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[epnum]; 176772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1768624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior WARN_ON(!dep->res_trans_idx); 176972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->res_trans_idx) { 177072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd = DWC3_DEPCMD_ENDTRANSFER; 177172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd |= DWC3_DEPCMD_HIPRI_FORCERM | DWC3_DEPCMD_CMDIOC; 177272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd |= DWC3_DEPCMD_PARAM(dep->res_trans_idx); 177372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0, sizeof(params)); 177472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, cmd, ¶ms); 177572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi WARN_ON_ONCE(ret); 1776a1ae9be5fc137d7e911a77ef408273ff55a53a39Sebastian Andrzej Siewior dep->res_trans_idx = 0; 177772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 177872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 177972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 178072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_stop_active_transfers(struct dwc3 *dwc) 178172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 178272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 epnum; 178372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 178472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi for (epnum = 2; epnum < DWC3_ENDPOINTS_NUM; epnum++) { 178572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 178672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 178772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[epnum]; 178872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) 178972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi continue; 179072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1791624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior dwc3_remove_requests(dwc, dep); 179272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 179372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 179472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 179572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_clear_stall_all_ep(struct dwc3 *dwc) 179672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 179772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 epnum; 179872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 179972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi for (epnum = 1; epnum < DWC3_ENDPOINTS_NUM; epnum++) { 180072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 180172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 180272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 180372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 180472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[epnum]; 180572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 180672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(dep->flags & DWC3_EP_STALL)) 180772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi continue; 180872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 180972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags &= ~DWC3_EP_STALL; 181072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 181172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0, sizeof(params)); 181272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, 181372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEPCMD_CLEARSTALL, ¶ms); 181472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi WARN_ON_ONCE(ret); 181572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 181672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 181772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 181872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_disconnect_interrupt(struct dwc3 *dwc) 181972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 182072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s\n", __func__); 182172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#if 0 182272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi XXX 182372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi U1/U2 is powersave optimization. Skip it for now. Anyway we need to 182472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi enable it before we can disable it. 182572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 182672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 182772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DCTL_INITU1ENA; 182872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 182972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 183072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DCTL_INITU2ENA; 183172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 183272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#endif 183372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 183472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_stop_active_transfers(dwc); 183572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_disconnect_gadget(dwc); 1836b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman dwc->start_config_issued = false; 183772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 183872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_UNKNOWN; 1839df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi dwc->setup_packet_pending = false; 184072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 184172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 184272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_usb3_phy_power(struct dwc3 *dwc, int on) 184372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 184472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 184572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 184672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(0)); 184772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 184872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (on) 184972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_GUSB3PIPECTL_SUSPHY; 185072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi else 185172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg |= DWC3_GUSB3PIPECTL_SUSPHY; 185272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 185372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg); 185472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 185572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 185672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_usb2_phy_power(struct dwc3 *dwc, int on) 185772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 185872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 185972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 186072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0)); 186172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 186272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (on) 186372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_GUSB2PHYCFG_SUSPHY; 186472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi else 186572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg |= DWC3_GUSB2PHYCFG_SUSPHY; 186672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 186772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg); 186872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 186972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 187072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_reset_interrupt(struct dwc3 *dwc) 187172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 187272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 187372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 187472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s\n", __func__); 187572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1876df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi /* 1877df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * WORKAROUND: DWC3 revisions <1.88a have an issue which 1878df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * would cause a missing Disconnect Event if there's a 1879df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * pending Setup Packet in the FIFO. 1880df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * 1881df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * There's no suggested workaround on the official Bug 1882df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * report, which states that "unless the driver/application 1883df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * is doing any special handling of a disconnect event, 1884df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * there is no functional issue". 1885df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * 1886df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * Unfortunately, it turns out that we _do_ some special 1887df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * handling of a disconnect event, namely complete all 1888df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * pending transfers, notify gadget driver of the 1889df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * disconnection, and so on. 1890df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * 1891df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * Our suggested workaround is to follow the Disconnect 1892df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * Event steps here, instead, based on a setup_packet_pending 1893df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * flag. Such flag gets set whenever we have a XferNotReady 1894df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * event on EP0 and gets cleared on XferComplete for the 1895df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * same endpoint. 1896df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * 1897df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * Refers to: 1898df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * 1899df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * STAR#9000466709: RTL: Device : Disconnect event not 1900df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * generated if setup packet pending in FIFO 1901df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi */ 1902df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi if (dwc->revision < DWC3_REVISION_188A) { 1903df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi if (dwc->setup_packet_pending) 1904df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi dwc3_gadget_disconnect_interrupt(dwc); 1905df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi } 1906df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi 1907961906edb549c95f4cc33e4f3dbfd0fcc364954dFelipe Balbi /* after reset -> Default State */ 1908961906edb549c95f4cc33e4f3dbfd0fcc364954dFelipe Balbi dwc->dev_state = DWC3_DEFAULT_STATE; 1909961906edb549c95f4cc33e4f3dbfd0fcc364954dFelipe Balbi 191072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* Enable PHYs */ 191172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_usb2_phy_power(dwc, true); 191272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_usb3_phy_power(dwc, true); 191372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 191472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dwc->gadget.speed != USB_SPEED_UNKNOWN) 191572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_disconnect_gadget(dwc); 191672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 191772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 191872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DCTL_TSTCTRL_MASK; 191972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 19203b637367ae40b6d3c20e30cb0cdd059e67bbf848Gerard Cauvy dwc->test_mode = false; 192172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 192272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_stop_active_transfers(dwc); 192372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_clear_stall_all_ep(dwc); 1924b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman dwc->start_config_issued = false; 192572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 192672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* Reset device address to zero */ 192772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCFG); 192872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~(DWC3_DCFG_DEVADDR_MASK); 192972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCFG, reg); 193072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 193172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 193272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_update_ram_clk_sel(struct dwc3 *dwc, u32 speed) 193372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 193472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 193572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 usb30_clock = DWC3_GCTL_CLK_BUS; 193672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 193772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 193872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We change the clock only at SS but I dunno why I would want to do 193972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * this. Maybe it becomes part of the power saving plan. 194072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 194172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 194272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (speed != DWC3_DSTS_SUPERSPEED) 194372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 194472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 194572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 194672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * RAMClkSel is reset to 0 after USB reset, so it must be reprogrammed 194772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * each time on Connect Done. 194872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 194972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!usb30_clock) 195072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 195172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 195272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_GCTL); 195372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg |= DWC3_GCTL_RAMCLKSEL(usb30_clock); 195472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_GCTL, reg); 195572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 195672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 195772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_disable_phy(struct dwc3 *dwc, u8 speed) 195872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 195972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (speed) { 196072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_SPEED_SUPER: 196172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_usb2_phy_power(dwc, false); 196272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 196372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_SPEED_HIGH: 196472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_SPEED_FULL: 196572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_SPEED_LOW: 196672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_usb3_phy_power(dwc, false); 196772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 196872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 196972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 197072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 197172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_conndone_interrupt(struct dwc3 *dwc) 197272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 197372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 197472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 197572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 197672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 197772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 speed; 197872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 197972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s\n", __func__); 198072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 198172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0x00, sizeof(params)); 198272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 198372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 198472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi speed = reg & DWC3_DSTS_CONNECTSPD; 198572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->speed = speed; 198672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 198772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_update_ram_clk_sel(dwc, speed); 198872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 198972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (speed) { 199072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DCFG_SUPERSPEED: 199105870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi /* 199205870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * WORKAROUND: DWC3 revisions <1.90a have an issue which 199305870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * would cause a missing USB3 Reset event. 199405870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * 199505870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * In such situations, we should force a USB3 Reset 199605870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * event by calling our dwc3_gadget_reset_interrupt() 199705870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * routine. 199805870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * 199905870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * Refers to: 200005870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * 200105870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * STAR#9000483510: RTL: SS : USB3 reset event may 200205870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * not be generated always when the link enters poll 200305870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi */ 200405870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi if (dwc->revision < DWC3_REVISION_190A) 200505870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi dwc3_gadget_reset_interrupt(dwc); 200605870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi 200772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(512); 200872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ep0->maxpacket = 512; 200972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_SUPER; 201072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 201172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DCFG_HIGHSPEED: 201272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(64); 201372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ep0->maxpacket = 64; 201472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_HIGH; 201572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 201672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DCFG_FULLSPEED2: 201772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DCFG_FULLSPEED1: 201872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(64); 201972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ep0->maxpacket = 64; 202072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_FULL; 202172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 202272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DCFG_LOWSPEED: 202372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(8); 202472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ep0->maxpacket = 8; 202572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_LOW; 202672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 202772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 202872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 202972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* Disable unneded PHY */ 203072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_disable_phy(dwc, dwc->gadget.speed); 203172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 203272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[0]; 2033c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL); 203472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 203572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to enable %s\n", dep->name); 203672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 203772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 203872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 203972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[1]; 2040c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL); 204172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 204272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to enable %s\n", dep->name); 204372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 204472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 204572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 204672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 204772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Configure PHY via GUSB3PIPECTLn if required. 204872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 204972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Update GTXFIFOSIZn 205072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 205172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * In both cases reset values should be sufficient. 205272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 205372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 205472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 205572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_wakeup_interrupt(struct dwc3 *dwc) 205672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 205772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s\n", __func__); 205872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 205972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 206072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * TODO take core out of low power mode when that's 206172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * implemented. 206272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 206372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 206472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver->resume(&dwc->gadget); 206572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 206672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 206772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_linksts_change_interrupt(struct dwc3 *dwc, 206872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned int evtinfo) 206972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 2070fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi enum dwc3_link_state next = evtinfo & DWC3_LINK_STATE_MASK; 2071fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 2072fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi /* 2073fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * WORKAROUND: DWC3 Revisions <1.83a have an issue which, depending 2074fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * on the link partner, the USB session might do multiple entry/exit 2075fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * of low power states before a transfer takes place. 2076fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * 2077fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * Due to this problem, we might experience lower throughput. The 2078fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * suggested workaround is to disable DCTL[12:9] bits if we're 2079fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * transitioning from U1/U2 to U0 and enable those bits again 2080fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * after a transfer completes and there are no pending transfers 2081fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * on any of the enabled endpoints. 2082fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * 2083fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * This is the first half of that workaround. 2084fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * 2085fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * Refers to: 2086fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * 2087fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * STAR#9000446952: RTL: Device SS : if U1/U2 ->U0 takes >128us 2088fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * core send LGO_Ux entering U0 2089fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi */ 2090fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi if (dwc->revision < DWC3_REVISION_183A) { 2091fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi if (next == DWC3_LINK_STATE_U0) { 2092fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi u32 u1u2; 2093fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi u32 reg; 2094fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 2095fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi switch (dwc->link_state) { 2096fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi case DWC3_LINK_STATE_U1: 2097fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi case DWC3_LINK_STATE_U2: 2098fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 2099fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi u1u2 = reg & (DWC3_DCTL_INITU2ENA 2100fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi | DWC3_DCTL_ACCEPTU2ENA 2101fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi | DWC3_DCTL_INITU1ENA 2102fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi | DWC3_DCTL_ACCEPTU1ENA); 2103fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 2104fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi if (!dwc->u1u2) 2105fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi dwc->u1u2 = reg & u1u2; 2106fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 2107fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi reg &= ~u1u2; 2108fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 2109fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 2110fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi break; 2111fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi default: 2112fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi /* do nothing */ 2113fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi break; 2114fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi } 2115fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi } 2116fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi } 2117fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 2118fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi dwc->link_state = next; 2119019ac83252dc2b356cb0ca81c25a077ec90309e7Felipe Balbi 2120019ac83252dc2b356cb0ca81c25a077ec90309e7Felipe Balbi dev_vdbg(dwc->dev, "%s link %d\n", __func__, dwc->link_state); 212172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 212272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 212372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_interrupt(struct dwc3 *dwc, 212472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct dwc3_event_devt *event) 212572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 212672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (event->type) { 212772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_DISCONNECT: 212872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_disconnect_interrupt(dwc); 212972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 213072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_RESET: 213172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_reset_interrupt(dwc); 213272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 213372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_CONNECT_DONE: 213472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_conndone_interrupt(dwc); 213572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 213672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_WAKEUP: 213772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_wakeup_interrupt(dwc); 213872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 213972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_LINK_STATUS_CHANGE: 214072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_linksts_change_interrupt(dwc, event->event_info); 214172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 214272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_EOPF: 214372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "End of Periodic Frame\n"); 214472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 214572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_SOF: 214672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "Start of Periodic Frame\n"); 214772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 214872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_ERRATIC_ERROR: 214972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "Erratic Error\n"); 215072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 215172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_CMD_CMPL: 215272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "Command Complete\n"); 215372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 215472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_OVERFLOW: 215572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "Overflow\n"); 215672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 215772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 215872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "UNKNOWN IRQ %d\n", event->type); 215972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 216072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 216172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 216272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_process_event_entry(struct dwc3 *dwc, 216372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const union dwc3_event *event) 216472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 216572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* Endpoint IRQ, handle it and return early */ 216672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (event->type.is_devspec == 0) { 216772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* depevt */ 216872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return dwc3_endpoint_interrupt(dwc, &event->depevt); 216972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 217072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 217172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (event->type.type) { 217272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_EVENT_TYPE_DEV: 217372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_interrupt(dwc, &event->devt); 217472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 217572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* REVISIT what to do with Carkit and I2C events ? */ 217672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 217772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "UNKNOWN IRQ type %d\n", event->raw); 217872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 217972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 218072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 218172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic irqreturn_t dwc3_process_event_buf(struct dwc3 *dwc, u32 buf) 218272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 218372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_event_buffer *evt; 218472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int left; 218572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 count; 218672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 218772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi count = dwc3_readl(dwc->regs, DWC3_GEVNTCOUNT(buf)); 218872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi count &= DWC3_GEVNTCOUNT_MASK; 218972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!count) 219072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return IRQ_NONE; 219172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 219272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi evt = dwc->ev_buffs[buf]; 219372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi left = count; 219472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 219572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi while (left > 0) { 219672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi union dwc3_event event; 219772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 2198d70d84423cbc5d6d929640189cf204e693024309Felipe Balbi event.raw = *(u32 *) (evt->buf + evt->lpos); 2199d70d84423cbc5d6d929640189cf204e693024309Felipe Balbi 220072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_process_event_entry(dwc, &event); 220172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 220272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * XXX we wrap around correctly to the next entry as almost all 220372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * entries are 4 bytes in size. There is one entry which has 12 220472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * bytes which is a regular entry followed by 8 bytes data. ATM 220572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * I don't know how things are organized if were get next to the 220672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * a boundary so I worry about that once we try to handle that. 220772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 220872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi evt->lpos = (evt->lpos + 4) % DWC3_EVENT_BUFFERS_SIZE; 220972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi left -= 4; 221072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 221172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_GEVNTCOUNT(buf), 4); 221272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 221372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 221472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return IRQ_HANDLED; 221572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 221672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 221772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic irqreturn_t dwc3_interrupt(int irq, void *_dwc) 221872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 221972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = _dwc; 222072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int i; 222172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi irqreturn_t ret = IRQ_NONE; 222272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 222372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock(&dwc->lock); 222472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 22259f622b2a407d8b34a5a7f5b4abd8b29b25cf4f32Felipe Balbi for (i = 0; i < dwc->num_event_buffers; i++) { 222672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi irqreturn_t status; 222772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 222872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi status = dwc3_process_event_buf(dwc, i); 222972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (status == IRQ_HANDLED) 223072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = status; 223172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 223272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 223372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock(&dwc->lock); 223472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 223572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 223672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 223772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 223872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/** 223972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * dwc3_gadget_init - Initializes gadget related registers 22401d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * @dwc: pointer to our controller context structure 224172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 224272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Returns 0 on success otherwise negative errno. 224372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 224472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiint __devinit dwc3_gadget_init(struct dwc3 *dwc) 224572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 224672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 224772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 224872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int irq; 224972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 225072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ctrl_req = dma_alloc_coherent(dwc->dev, sizeof(*dwc->ctrl_req), 225172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi &dwc->ctrl_req_addr, GFP_KERNEL); 225272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dwc->ctrl_req) { 225372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to allocate ctrl request\n"); 225472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -ENOMEM; 225572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto err0; 225672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 225772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 225872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ep0_trb = dma_alloc_coherent(dwc->dev, sizeof(*dwc->ep0_trb), 225972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi &dwc->ep0_trb_addr, GFP_KERNEL); 226072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dwc->ep0_trb) { 226172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to allocate ep0 trb\n"); 226272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -ENOMEM; 226372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto err1; 226472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 226572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 22660fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi dwc->setup_buf = kzalloc(sizeof(*dwc->setup_buf) * 2, 22670fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi GFP_KERNEL); 226872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dwc->setup_buf) { 226972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to allocate setup buffer\n"); 227072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -ENOMEM; 227172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto err2; 227272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 227372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 22745812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi dwc->ep0_bounce = dma_alloc_coherent(dwc->dev, 22755812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi 512, &dwc->ep0_bounce_addr, GFP_KERNEL); 22765812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi if (!dwc->ep0_bounce) { 22775812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi dev_err(dwc->dev, "failed to allocate ep0 bounce buffer\n"); 22785812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi ret = -ENOMEM; 22795812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi goto err3; 22805812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi } 22815812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi 228272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_set_name(&dwc->gadget.dev, "gadget"); 228372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 228472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ops = &dwc3_gadget_ops; 2285d327ab5b6d660d6fe22b073b743fde1668e593bbMichal Nazarewicz dwc->gadget.max_speed = USB_SPEED_SUPER; 228672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_UNKNOWN; 228772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.dev.parent = dwc->dev; 2288eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dwc->gadget.sg_supported = true; 228972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 229072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_set_coherent_mask(&dwc->gadget.dev, dwc->dev->coherent_dma_mask); 229172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 229272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.dev.dma_parms = dwc->dev->dma_parms; 229372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.dev.dma_mask = dwc->dev->dma_mask; 229472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.dev.release = dwc3_gadget_release; 229572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.name = "dwc3-gadget"; 229672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 229772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 229872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * REVISIT: Here we should clear all pending IRQs to be 229972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * sure we're starting from a well known location. 230072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 230172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 230272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_gadget_init_endpoints(dwc); 230372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 23045812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi goto err4; 230572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 230672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi irq = platform_get_irq(to_platform_device(dwc->dev), 0); 230772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 230872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = request_irq(irq, dwc3_interrupt, IRQF_SHARED, 230972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi "dwc3", dwc); 231072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 231172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to request irq #%d --> %d\n", 231272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi irq, ret); 23135812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi goto err5; 231472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 231572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 231672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* Enable all but Start and End of Frame IRQs */ 231772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = (DWC3_DEVTEN_VNDRDEVTSTRCVEDEN | 231872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEVTEN_EVNTOVERFLOWEN | 231972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEVTEN_CMDCMPLTEN | 232072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEVTEN_ERRTICERREN | 232172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEVTEN_WKUPEVTEN | 232272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEVTEN_ULSTCNGEN | 232372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEVTEN_CONNECTDONEEN | 232472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEVTEN_USBRSTEN | 232572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEVTEN_DISCONNEVTEN); 232672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEVTEN, reg); 232772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 232872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = device_register(&dwc->gadget.dev); 232972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 233072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to register gadget device\n"); 233172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi put_device(&dwc->gadget.dev); 23325812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi goto err6; 233372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 233472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 233572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = usb_add_gadget_udc(dwc->dev, &dwc->gadget); 233672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 233772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to register udc\n"); 23385812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi goto err7; 233972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 234072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 234172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 234272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 23435812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbierr7: 234472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi device_unregister(&dwc->gadget.dev); 234572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 23465812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbierr6: 234772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEVTEN, 0x00); 234872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi free_irq(irq, dwc); 234972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 23505812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbierr5: 235172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_free_endpoints(dwc); 235272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 23535812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbierr4: 23545812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi dma_free_coherent(dwc->dev, 512, dwc->ep0_bounce, 23555812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi dwc->ep0_bounce_addr); 23565812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi 235772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbierr3: 23580fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi kfree(dwc->setup_buf); 235972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 236072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbierr2: 236172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(*dwc->ep0_trb), 236272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ep0_trb, dwc->ep0_trb_addr); 236372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 236472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbierr1: 236572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(*dwc->ctrl_req), 236672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ctrl_req, dwc->ctrl_req_addr); 236772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 236872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbierr0: 236972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 237072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 237172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 237272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbivoid dwc3_gadget_exit(struct dwc3 *dwc) 237372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 237472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int irq; 237572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 237672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi usb_del_gadget_udc(&dwc->gadget); 237772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi irq = platform_get_irq(to_platform_device(dwc->dev), 0); 237872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 237972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEVTEN, 0x00); 238072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi free_irq(irq, dwc); 238172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 238272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_free_endpoints(dwc); 238372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 23845812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi dma_free_coherent(dwc->dev, 512, dwc->ep0_bounce, 23855812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi dwc->ep0_bounce_addr); 23865812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi 23870fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi kfree(dwc->setup_buf); 238872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 238972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(*dwc->ep0_trb), 239072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ep0_trb, dwc->ep0_trb_addr); 239172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 239272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(*dwc->ctrl_req), 239372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ctrl_req, dwc->ctrl_req_addr); 239472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 239572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi device_unregister(&dwc->gadget.dev); 239672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 2397