gadget.c revision 2e81c36a00d0eb8ce72faaaec1a1d865617374ae
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 5772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#define DMA_ADDR_INVALID (~(dma_addr_t)0) 5872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 5904a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi/** 6004a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi * dwc3_gadget_set_test_mode - Enables USB2 Test Modes 6104a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi * @dwc: pointer to our context structure 6204a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi * @mode: the mode to set (J, K SE0 NAK, Force Enable) 6304a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi * 6404a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi * Caller should take care of locking. This function will 6504a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi * return 0 on success or -EINVAL if wrong Test Selector 6604a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi * is passed 6704a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi */ 6804a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbiint dwc3_gadget_set_test_mode(struct dwc3 *dwc, int mode) 6904a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi{ 7004a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi u32 reg; 7104a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi 7204a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 7304a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi reg &= ~DWC3_DCTL_TSTCTRL_MASK; 7404a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi 7504a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi switch (mode) { 7604a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi case TEST_J: 7704a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi case TEST_K: 7804a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi case TEST_SE0_NAK: 7904a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi case TEST_PACKET: 8004a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi case TEST_FORCE_EN: 8104a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi reg |= mode << 1; 8204a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi break; 8304a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi default: 8404a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi return -EINVAL; 8504a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi } 8604a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi 8704a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 8804a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi 8904a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi return 0; 9004a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi} 9104a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi 928598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi/** 938598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi * dwc3_gadget_set_link_state - Sets USB Link to a particular State 948598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi * @dwc: pointer to our context structure 958598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi * @state: the state to put link into 968598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi * 978598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi * Caller should take care of locking. This function will 988598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi * return 0 on success or -EINVAL. 998598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi */ 1008598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbiint dwc3_gadget_set_link_state(struct dwc3 *dwc, enum dwc3_link_state state) 1018598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi{ 1028598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi int retries = 100; 1038598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi u32 reg; 1048598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi 1058598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 1068598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi reg &= ~DWC3_DCTL_ULSTCHNGREQ_MASK; 1078598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi 1088598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi /* set requested state */ 1098598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi reg |= DWC3_DCTL_ULSTCHNGREQ(state); 1108598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 1118598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi 1128598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi /* wait for a change in DSTS */ 1138598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi while (--retries) { 1148598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 1158598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi 1168598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi /* in HS, means ON */ 1178598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi if (DWC3_DSTS_USBLNKST(reg) == state) 1188598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi return 0; 1198598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi 120138801aaa566ecb5a5739a85909b9ec7285efd70Felipe Balbi udelay(500); 1218598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi } 1228598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi 1238598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi dev_vdbg(dwc->dev, "link state change request timed out\n"); 1248598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi 1258598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi return -ETIMEDOUT; 1268598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi} 1278598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi 128457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi/** 129457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * dwc3_gadget_resize_tx_fifos - reallocate fifo spaces for current use-case 130457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * @dwc: pointer to our context structure 131457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * 132457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * This function will a best effort FIFO allocation in order 133457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * to improve FIFO usage and throughput, while still allowing 134457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * us to enable as many endpoints as possible. 135457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * 136457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * Keep in mind that this operation will be highly dependent 137457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * on the configured size for RAM1 - which contains TxFifo -, 138457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * the amount of endpoints enabled on coreConsultant tool, and 139457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * the width of the Master Bus. 140457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * 141457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * In the ideal world, we would always be able to satisfy the 142457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * following equation: 143457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * 144457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * ((512 + 2 * MDWIDTH-Bytes) + (Number of IN Endpoints - 1) * \ 145457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * (3 * (1024 + MDWIDTH-Bytes) + MDWIDTH-Bytes)) / MDWIDTH-Bytes 146457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * 147457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * Unfortunately, due to many variables that's not always the case. 148457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi */ 149457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbiint dwc3_gadget_resize_tx_fifos(struct dwc3 *dwc) 150457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi{ 151457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi int last_fifo_depth = 0; 152457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi int ram1_depth; 153457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi int fifo_size; 154457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi int mdwidth; 155457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi int num; 156457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 157457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi if (!dwc->needs_fifo_resize) 158457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi return 0; 159457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 160457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi ram1_depth = DWC3_RAM1_DEPTH(dwc->hwparams.hwparams7); 161457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi mdwidth = DWC3_MDWIDTH(dwc->hwparams.hwparams0); 162457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 163457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi /* MDWIDTH is represented in bits, we need it in bytes */ 164457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi mdwidth >>= 3; 165457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 166457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi /* 167457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * FIXME For now we will only allocate 1 wMaxPacketSize space 168457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * for each enabled endpoint, later patches will come to 169457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * improve this algorithm so that we better use the internal 170457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * FIFO space 171457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi */ 172457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi for (num = 0; num < DWC3_ENDPOINTS_NUM; num++) { 173457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi struct dwc3_ep *dep = dwc->eps[num]; 174457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi int fifo_number = dep->number >> 1; 1752e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi int mult = 1; 176457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi int tmp; 177457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 178457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi if (!(dep->number & 1)) 179457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi continue; 180457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 181457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) 182457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi continue; 183457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 1842e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi if (usb_endpoint_xfer_bulk(dep->desc) 1852e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi || usb_endpoint_xfer_isoc(dep->desc)) 1862e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi mult = 3; 1872e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi 1882e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi /* 1892e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi * REVISIT: the following assumes we will always have enough 1902e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi * space available on the FIFO RAM for all possible use cases. 1912e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi * Make sure that's true somehow and change FIFO allocation 1922e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi * accordingly. 1932e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi * 1942e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi * If we have Bulk or Isochronous endpoints, we want 1952e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi * them to be able to be very, very fast. So we're giving 1962e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi * those endpoints a fifo_size which is enough for 3 full 1972e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi * packets 1982e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi */ 1992e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi tmp = mult * (dep->endpoint.maxpacket + mdwidth); 200457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi tmp += mdwidth; 201457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 202457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi fifo_size = DIV_ROUND_UP(tmp, mdwidth); 2032e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi 204457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi fifo_size |= (last_fifo_depth << 16); 205457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 206457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi dev_vdbg(dwc->dev, "%s: Fifo Addr %04x Size %d\n", 207457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi dep->name, last_fifo_depth, fifo_size & 0xffff); 208457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 209457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi dwc3_writel(dwc->regs, DWC3_GTXFIFOSIZ(fifo_number), 210457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi fifo_size); 211457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 212457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi last_fifo_depth += (fifo_size & 0xffff); 213457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi } 214457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 215457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi return 0; 216457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi} 217457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 21872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbivoid dwc3_map_buffer_to_dma(struct dwc3_request *req) 21972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 22072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = req->dep->dwc; 22172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 22278c58a53c9864447f2a46d4c06dd3c2616823ad2Sebastian Andrzej Siewior if (req->request.length == 0) { 22378c58a53c9864447f2a46d4c06dd3c2616823ad2Sebastian Andrzej Siewior /* req->request.dma = dwc->setup_buf_addr; */ 22478c58a53c9864447f2a46d4c06dd3c2616823ad2Sebastian Andrzej Siewior return; 22578c58a53c9864447f2a46d4c06dd3c2616823ad2Sebastian Andrzej Siewior } 22678c58a53c9864447f2a46d4c06dd3c2616823ad2Sebastian Andrzej Siewior 227eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (req->request.num_sgs) { 228eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi int mapped; 229eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi 230eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi mapped = dma_map_sg(dwc->dev, req->request.sg, 231eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi req->request.num_sgs, 232eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi req->direction ? DMA_TO_DEVICE 233eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi : DMA_FROM_DEVICE); 234eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (mapped < 0) { 235eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dev_err(dwc->dev, "failed to map SGs\n"); 236eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi return; 237eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi } 238eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi 239eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi req->request.num_mapped_sgs = mapped; 240eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi return; 241eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi } 242eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi 24372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (req->request.dma == DMA_ADDR_INVALID) { 24472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.dma = dma_map_single(dwc->dev, req->request.buf, 24572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.length, req->direction 24672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ? DMA_TO_DEVICE : DMA_FROM_DEVICE); 24772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->mapped = true; 24872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 24972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 25072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 25172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbivoid dwc3_unmap_buffer_from_dma(struct dwc3_request *req) 25272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 25372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = req->dep->dwc; 25472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 25578c58a53c9864447f2a46d4c06dd3c2616823ad2Sebastian Andrzej Siewior if (req->request.length == 0) { 25678c58a53c9864447f2a46d4c06dd3c2616823ad2Sebastian Andrzej Siewior req->request.dma = DMA_ADDR_INVALID; 25778c58a53c9864447f2a46d4c06dd3c2616823ad2Sebastian Andrzej Siewior return; 25878c58a53c9864447f2a46d4c06dd3c2616823ad2Sebastian Andrzej Siewior } 25978c58a53c9864447f2a46d4c06dd3c2616823ad2Sebastian Andrzej Siewior 260eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (req->request.num_mapped_sgs) { 261eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi req->request.dma = DMA_ADDR_INVALID; 262eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dma_unmap_sg(dwc->dev, req->request.sg, 263c09d6b51d78f5ad33417dbac9b479bd6709f9f25Sebastian Andrzej Siewior req->request.num_mapped_sgs, 264eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi req->direction ? DMA_TO_DEVICE 265eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi : DMA_FROM_DEVICE); 266eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi 267eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi req->request.num_mapped_sgs = 0; 268eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi return; 269eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi } 270eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi 27172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (req->mapped) { 27272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_unmap_single(dwc->dev, req->request.dma, 27372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.length, req->direction 27472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ? DMA_TO_DEVICE : DMA_FROM_DEVICE); 27572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->mapped = 0; 276f198ead21bcb7b03d7bb2cba7ba0f5ad615a3862Felipe Balbi req->request.dma = DMA_ADDR_INVALID; 27772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 27872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 27972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 28072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbivoid dwc3_gadget_giveback(struct dwc3_ep *dep, struct dwc3_request *req, 28172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int status) 28272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 28372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 28472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 28572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (req->queued) { 286eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (req->request.num_mapped_sgs) 287eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dep->busy_slot += req->request.num_mapped_sgs; 288eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi else 289eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dep->busy_slot++; 290eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi 29172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 29272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Skip LINK TRB. We can't use req->trb and check for 29372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * DWC3_TRBCTL_LINK_TRB because it points the TRB we just 29472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * completed (not the LINK TRB). 29572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 29672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (((dep->busy_slot & DWC3_TRB_MASK) == DWC3_TRB_NUM - 1) && 29772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi usb_endpoint_xfer_isoc(dep->desc)) 29872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->busy_slot++; 29972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 30072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_del(&req->list); 301eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi req->trb = NULL; 30272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 30372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (req->request.status == -EINPROGRESS) 30472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.status = status; 30572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 30672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_unmap_buffer_from_dma(req); 30772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 30872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "request %p from %s completed %d/%d ===> %d\n", 30972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req, dep->name, req->request.actual, 31072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.length, status); 31172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 31272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock(&dwc->lock); 31372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.complete(&req->dep->endpoint, &req->request); 31472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock(&dwc->lock); 31572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 31672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 31772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic const char *dwc3_gadget_ep_cmd_string(u8 cmd) 31872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 31972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (cmd) { 32072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_DEPSTARTCFG: 32172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Start New Configuration"; 32272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_ENDTRANSFER: 32372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "End Transfer"; 32472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_UPDATETRANSFER: 32572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Update Transfer"; 32672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_STARTTRANSFER: 32772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Start Transfer"; 32872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_CLEARSTALL: 32972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Clear Stall"; 33072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_SETSTALL: 33172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Set Stall"; 33272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_GETSEQNUMBER: 33372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Get Data Sequence Number"; 33472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_SETTRANSFRESOURCE: 33572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Set Endpoint Transfer Resource"; 33672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_SETEPCONFIG: 33772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Set Endpoint Configuration"; 33872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 33972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "UNKNOWN command"; 34072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 34172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 34272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 34372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiint dwc3_send_gadget_ep_cmd(struct dwc3 *dwc, unsigned ep, 34472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned cmd, struct dwc3_gadget_ep_cmd_params *params) 34572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 34672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = dwc->eps[ep]; 34761d58242f634642de42d6a4098913b7254a65053Sebastian Andrzej Siewior u32 timeout = 500; 34872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 34972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 35072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s: cmd '%s' params %08x %08x %08x\n", 35172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name, 352dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi dwc3_gadget_ep_cmd_string(cmd), params->param0, 353dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params->param1, params->param2); 35472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 355dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEPCMDPAR0(ep), params->param0); 356dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEPCMDPAR1(ep), params->param1); 357dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEPCMDPAR2(ep), params->param2); 35872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 35972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEPCMD(ep), cmd | DWC3_DEPCMD_CMDACT); 36072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi do { 36172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DEPCMD(ep)); 36272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(reg & DWC3_DEPCMD_CMDACT)) { 363164f6e141ed214bda30fb219d41ec3254bd90886Felipe Balbi dev_vdbg(dwc->dev, "Command Complete --> %d\n", 364164f6e141ed214bda30fb219d41ec3254bd90886Felipe Balbi DWC3_DEPCMD_STATUS(reg)); 36572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 36672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 36772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 36872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 36972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We can't sleep here, because it is also called from 37072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * interrupt context. 37172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 37272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi timeout--; 37372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!timeout) 37472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -ETIMEDOUT; 37572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 37661d58242f634642de42d6a4098913b7254a65053Sebastian Andrzej Siewior udelay(1); 37772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } while (1); 37872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 37972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 38072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic dma_addr_t dwc3_trb_dma_offset(struct dwc3_ep *dep, 38172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_trb_hw *trb) 38272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 383c439ef87c33a1df30f528cb152151465c2529cacPaul Zimmerman u32 offset = (char *) trb - (char *) dep->trb_pool; 38472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 38572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return dep->trb_pool_dma + offset; 38672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 38772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 38872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_alloc_trb_pool(struct dwc3_ep *dep) 38972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 39072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 39172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 39272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->trb_pool) 39372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 39472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 39572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->number == 0 || dep->number == 1) 39672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 39772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 39872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->trb_pool = dma_alloc_coherent(dwc->dev, 39972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi sizeof(struct dwc3_trb) * DWC3_TRB_NUM, 40072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi &dep->trb_pool_dma, GFP_KERNEL); 40172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dep->trb_pool) { 40272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dep->dwc->dev, "failed to allocate trb pool for %s\n", 40372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 40472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -ENOMEM; 40572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 40672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 40772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 40872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 40972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 41072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_free_trb_pool(struct dwc3_ep *dep) 41172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 41272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 41372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 41472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(struct dwc3_trb) * DWC3_TRB_NUM, 41572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->trb_pool, dep->trb_pool_dma); 41672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 41772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->trb_pool = NULL; 41872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->trb_pool_dma = 0; 41972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 42072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 42172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_start_config(struct dwc3 *dwc, struct dwc3_ep *dep) 42272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 42372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 42472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 cmd; 42572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 42672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0x00, sizeof(params)); 42772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 42872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->number != 1) { 42972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd = DWC3_DEPCMD_DEPSTARTCFG; 43072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* XferRscIdx == 0 for ep0 and 2 for the remaining */ 431b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman if (dep->number > 1) { 432b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman if (dwc->start_config_issued) 433b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman return 0; 434b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman dwc->start_config_issued = true; 43572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd |= DWC3_DEPCMD_PARAM(2); 436b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman } 43772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 43872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return dwc3_send_gadget_ep_cmd(dwc, 0, cmd, ¶ms); 43972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 44072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 44172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 44272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 44372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 44472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_set_ep_config(struct dwc3 *dwc, struct dwc3_ep *dep, 445c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi const struct usb_endpoint_descriptor *desc, 446c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi const struct usb_ss_ep_comp_descriptor *comp_desc) 44772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 44872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 44972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 45072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0x00, sizeof(params)); 45172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 452dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param0 = DWC3_DEPCFG_EP_TYPE(usb_endpoint_type(desc)) 453dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi | DWC3_DEPCFG_MAX_PACKET_SIZE(usb_endpoint_maxp(desc)) 454dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi | DWC3_DEPCFG_BURST_SIZE(dep->endpoint.maxburst); 45572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 456dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param1 = DWC3_DEPCFG_XFER_COMPLETE_EN 457dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi | DWC3_DEPCFG_XFER_NOT_READY_EN; 45872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 45918b7ede5f7ee2092aedcb578d3ac30bd5d4fc23cFelipe Balbi if (usb_ss_max_streams(comp_desc) && usb_endpoint_xfer_bulk(desc)) { 460dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param1 |= DWC3_DEPCFG_STREAM_CAPABLE 461dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi | DWC3_DEPCFG_STREAM_EVENT_EN; 462879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dep->stream_capable = true; 463879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi } 464879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi 46572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (usb_endpoint_xfer_isoc(desc)) 466dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param1 |= DWC3_DEPCFG_XFER_IN_PROGRESS_EN; 46772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 46872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 46972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We are doing 1:1 mapping for endpoints, meaning 47072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Physical Endpoints 2 maps to Logical Endpoint 2 and 47172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * so on. We consider the direction bit as part of the physical 47272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * endpoint number. So USB endpoint 0x81 is 0x03. 47372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 474dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param1 |= DWC3_DEPCFG_EP_NUMBER(dep->number); 47572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 47672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 47772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We must use the lower 16 TX FIFOs even though 47872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * HW might have more 47972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 48072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->direction) 481dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param0 |= DWC3_DEPCFG_FIFO_NUMBER(dep->number >> 1); 48272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 48372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (desc->bInterval) { 484dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param1 |= DWC3_DEPCFG_BINTERVAL_M1(desc->bInterval - 1); 48572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->interval = 1 << (desc->bInterval - 1); 48672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 48772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 48872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return dwc3_send_gadget_ep_cmd(dwc, dep->number, 48972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEPCMD_SETEPCONFIG, ¶ms); 49072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 49172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 49272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_set_xfer_resource(struct dwc3 *dwc, struct dwc3_ep *dep) 49372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 49472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 49572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 49672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0x00, sizeof(params)); 49772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 498dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param0 = DWC3_DEPXFERCFG_NUM_XFER_RES(1); 49972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 50072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return dwc3_send_gadget_ep_cmd(dwc, dep->number, 50172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEPCMD_SETTRANSFRESOURCE, ¶ms); 50272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 50372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 50472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/** 50572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * __dwc3_gadget_ep_enable - Initializes a HW endpoint 50672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * @dep: endpoint to be initialized 50772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * @desc: USB Endpoint Descriptor 50872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 50972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Caller should take care of locking 51072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 51172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int __dwc3_gadget_ep_enable(struct dwc3_ep *dep, 512c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi const struct usb_endpoint_descriptor *desc, 513c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi const struct usb_ss_ep_comp_descriptor *comp_desc) 51472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 51572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 51672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 51772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret = -ENOMEM; 51872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 51972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) { 52072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_gadget_start_config(dwc, dep); 52172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 52272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 52372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 52472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 525c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi ret = dwc3_gadget_set_ep_config(dwc, dep, desc, comp_desc); 52672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 52772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 52872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 52972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) { 53072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_trb_hw *trb_st_hw; 53172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_trb_hw *trb_link_hw; 53272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_trb trb_link; 53372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 53472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_gadget_set_xfer_resource(dwc, dep); 53572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 53672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 53772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 53872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->desc = desc; 539c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi dep->comp_desc = comp_desc; 54072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->type = usb_endpoint_type(desc); 54172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags |= DWC3_EP_ENABLED; 54272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 54372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DALEPENA); 54472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg |= DWC3_DALEPENA_EP(dep->number); 54572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DALEPENA, reg); 54672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 54772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!usb_endpoint_xfer_isoc(desc)) 54872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 54972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 55072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(&trb_link, 0, sizeof(trb_link)); 55172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 55272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* Link TRB for ISOC. The HWO but is never reset */ 55372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trb_st_hw = &dep->trb_pool[0]; 55472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 55572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trb_link.bplh = dwc3_trb_dma_offset(dep, trb_st_hw); 55672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trb_link.trbctl = DWC3_TRBCTL_LINK_TRB; 55772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trb_link.hwo = true; 55872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 55972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trb_link_hw = &dep->trb_pool[DWC3_TRB_NUM - 1]; 56072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_trb_to_hw(&trb_link, trb_link_hw); 56172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 56272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 56372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 56472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 56572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 566624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewiorstatic void dwc3_stop_active_transfer(struct dwc3 *dwc, u32 epnum); 567624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewiorstatic void dwc3_remove_requests(struct dwc3 *dwc, struct dwc3_ep *dep) 56872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 56972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req; 57072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 571624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior if (!list_empty(&dep->req_queued)) 572624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior dwc3_stop_active_transfer(dwc, dep->number); 573624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior 57472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi while (!list_empty(&dep->request_list)) { 57572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req = next_request(&dep->request_list); 57672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 577624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior dwc3_gadget_giveback(dep, req, -ESHUTDOWN); 57872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 57972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 58072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 58172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/** 58272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * __dwc3_gadget_ep_disable - Disables a HW endpoint 58372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * @dep: the endpoint to disable 58472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 585624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior * This function also removes requests which are currently processed ny the 586624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior * hardware and those which are not yet scheduled. 587624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior * Caller should take care of locking. 58872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 58972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int __dwc3_gadget_ep_disable(struct dwc3_ep *dep) 59072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 59172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 59272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 59372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 594624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior dwc3_remove_requests(dwc, dep); 59572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 59672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DALEPENA); 59772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DALEPENA_EP(dep->number); 59872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DALEPENA, reg); 59972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 600879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dep->stream_capable = false; 60172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->desc = NULL; 602c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi dep->comp_desc = NULL; 60372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->type = 0; 604879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dep->flags = 0; 60572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 60672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 60772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 60872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 60972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 61072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 61172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep0_enable(struct usb_ep *ep, 61272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct usb_endpoint_descriptor *desc) 61372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 61472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EINVAL; 61572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 61672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 61772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep0_disable(struct usb_ep *ep) 61872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 61972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EINVAL; 62072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 62172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 62272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 62372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 62472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_enable(struct usb_ep *ep, 62572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct usb_endpoint_descriptor *desc) 62672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 62772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 62872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc; 62972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 63072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 63172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 63272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!ep || !desc || desc->bDescriptorType != USB_DT_ENDPOINT) { 63372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi pr_debug("dwc3: invalid parameters\n"); 63472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EINVAL; 63572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 63672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 63772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!desc->wMaxPacketSize) { 63872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi pr_debug("dwc3: missing wMaxPacketSize\n"); 63972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EINVAL; 64072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 64172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 64272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = to_dwc3_ep(ep); 64372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc = dep->dwc; 64472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 64572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (usb_endpoint_type(desc)) { 64672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_ENDPOINT_XFER_CONTROL: 64772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi strncat(dep->name, "-control", sizeof(dep->name)); 64872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 64972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_ENDPOINT_XFER_ISOC: 65072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi strncat(dep->name, "-isoc", sizeof(dep->name)); 65172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 65272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_ENDPOINT_XFER_BULK: 65372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi strncat(dep->name, "-bulk", sizeof(dep->name)); 65472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 65572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_ENDPOINT_XFER_INT: 65672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi strncat(dep->name, "-int", sizeof(dep->name)); 65772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 65872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 65972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "invalid endpoint transfer type\n"); 66072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 66172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 66272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->flags & DWC3_EP_ENABLED) { 66372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_WARN_ONCE(dwc->dev, true, "%s is already enabled\n", 66472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 66572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 66672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 66772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 66872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "Enabling %s\n", dep->name); 66972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 67072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 671c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi ret = __dwc3_gadget_ep_enable(dep, desc, ep->comp_desc); 67272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 67372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 67472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 67572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 67672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 67772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_disable(struct usb_ep *ep) 67872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 67972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 68072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc; 68172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 68272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 68372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 68472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!ep) { 68572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi pr_debug("dwc3: invalid parameters\n"); 68672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EINVAL; 68772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 68872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 68972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = to_dwc3_ep(ep); 69072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc = dep->dwc; 69172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 69272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) { 69372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_WARN_ONCE(dwc->dev, true, "%s is already disabled\n", 69472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 69572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 69672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 69772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 69872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi snprintf(dep->name, sizeof(dep->name), "ep%d%s", 69972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->number >> 1, 70072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi (dep->number & 1) ? "in" : "out"); 70172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 70272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 70372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = __dwc3_gadget_ep_disable(dep); 70472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 70572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 70672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 70772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 70872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 70972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic struct usb_request *dwc3_gadget_ep_alloc_request(struct usb_ep *ep, 71072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi gfp_t gfp_flags) 71172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 71272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req; 71372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = to_dwc3_ep(ep); 71472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 71572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 71672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req = kzalloc(sizeof(*req), gfp_flags); 71772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!req) { 71872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "not enough memory\n"); 71972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return NULL; 72072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 72172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 72272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->epnum = dep->number; 72372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->dep = dep; 72472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.dma = DMA_ADDR_INVALID; 72572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 72672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return &req->request; 72772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 72872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 72972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_ep_free_request(struct usb_ep *ep, 73072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct usb_request *request) 73172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 73272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req = to_dwc3_request(request); 73372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 73472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi kfree(req); 73572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 73672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 737c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi/** 738c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi * dwc3_prepare_one_trb - setup one TRB from one request 739c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi * @dep: endpoint for which this request is prepared 740c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi * @req: dwc3_request pointer 741c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi */ 74268e823e24aea5227eaf20d6435485e733109d113Felipe Balbistatic void dwc3_prepare_one_trb(struct dwc3_ep *dep, 743eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi struct dwc3_request *req, dma_addr_t dma, 744eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi unsigned length, unsigned last, unsigned chain) 745c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi{ 746eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi struct dwc3 *dwc = dep->dwc; 747c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi struct dwc3_trb_hw *trb_hw; 748c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi struct dwc3_trb trb; 749c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 750c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi unsigned int cur_slot; 751c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 752eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dev_vdbg(dwc->dev, "%s: req %p dma %08llx length %d%s%s\n", 753eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dep->name, req, (unsigned long long) dma, 754eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi length, last ? " last" : "", 755eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi chain ? " chain" : ""); 756eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi 757c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi trb_hw = &dep->trb_pool[dep->free_slot & DWC3_TRB_MASK]; 758c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi cur_slot = dep->free_slot; 759c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi dep->free_slot++; 760c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 761c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi /* Skip the LINK-TRB on ISOC */ 762c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi if (((cur_slot & DWC3_TRB_MASK) == DWC3_TRB_NUM - 1) && 763c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi usb_endpoint_xfer_isoc(dep->desc)) 76468e823e24aea5227eaf20d6435485e733109d113Felipe Balbi return; 765c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 766c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi memset(&trb, 0, sizeof(trb)); 767eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (!req->trb) { 768eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dwc3_gadget_move_request_queued(req); 769eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi req->trb = trb_hw; 770eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi req->trb_dma = dwc3_trb_dma_offset(dep, trb_hw); 771eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi } 772c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 773c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi if (usb_endpoint_xfer_isoc(dep->desc)) { 774c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi trb.isp_imi = true; 775c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi trb.csp = true; 776c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi } else { 777eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi trb.chn = chain; 778c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi trb.lst = last; 779c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi } 780c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 781c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi if (usb_endpoint_xfer_bulk(dep->desc) && dep->stream_capable) 782c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi trb.sid_sofn = req->request.stream_id; 783c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 784c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi switch (usb_endpoint_type(dep->desc)) { 785c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi case USB_ENDPOINT_XFER_CONTROL: 786c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi trb.trbctl = DWC3_TRBCTL_CONTROL_SETUP; 787c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi break; 788c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 789c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi case USB_ENDPOINT_XFER_ISOC: 790c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi trb.trbctl = DWC3_TRBCTL_ISOCHRONOUS_FIRST; 791c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 792c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi /* IOC every DWC3_TRB_NUM / 4 so we can refill */ 793c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi if (!(cur_slot % (DWC3_TRB_NUM / 4))) 794c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi trb.ioc = last; 795c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi break; 796c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 797c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi case USB_ENDPOINT_XFER_BULK: 798c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi case USB_ENDPOINT_XFER_INT: 799c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi trb.trbctl = DWC3_TRBCTL_NORMAL; 800c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi break; 801c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi default: 802c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi /* 803c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi * This is only possible with faulty memory because we 804c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi * checked it already :) 805c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi */ 806c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi BUG(); 807c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi } 808c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 809eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi trb.length = length; 810eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi trb.bplh = dma; 811c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi trb.hwo = true; 812c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 813c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi dwc3_trb_to_hw(&trb, trb_hw); 814c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi} 815c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 81672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* 81772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * dwc3_prepare_trbs - setup TRBs from requests 81872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * @dep: endpoint for which requests are being prepared 81972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * @starting: true if the endpoint is idle and no requests are queued. 82072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 82172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * The functions goes through the requests list and setups TRBs for the 82272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * transfers. The functions returns once there are not more TRBs available or 82372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * it run out of requests. 82472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 82568e823e24aea5227eaf20d6435485e733109d113Felipe Balbistatic void dwc3_prepare_trbs(struct dwc3_ep *dep, bool starting) 82672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 82768e823e24aea5227eaf20d6435485e733109d113Felipe Balbi struct dwc3_request *req, *n; 82872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 trbs_left; 829c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi unsigned int last_one = 0; 83072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 83172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi BUILD_BUG_ON_NOT_POWER_OF_2(DWC3_TRB_NUM); 83272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 83372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* the first request must not be queued */ 83472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trbs_left = (dep->busy_slot - dep->free_slot) & DWC3_TRB_MASK; 835c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 83672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 83772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * if busy & slot are equal than it is either full or empty. If we are 83872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * starting to proceed requests then we are empty. Otherwise we ar 83972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * full and don't do anything 84072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 84172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!trbs_left) { 84272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!starting) 84368e823e24aea5227eaf20d6435485e733109d113Felipe Balbi return; 84472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trbs_left = DWC3_TRB_NUM; 84572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 84672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * In case we start from scratch, we queue the ISOC requests 84772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * starting from slot 1. This is done because we use ring 84872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * buffer and have no LST bit to stop us. Instead, we place 84972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * IOC bit TRB_NUM/4. We try to avoid to having an interrupt 85072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * after the first request so we start at slot 1 and have 85172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 7 requests proceed before we hit the first IOC. 85272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Other transfer types don't use the ring buffer and are 85372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * processed from the first TRB until the last one. Since we 85472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * don't wrap around we have to start at the beginning. 85572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 85672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (usb_endpoint_xfer_isoc(dep->desc)) { 85772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->busy_slot = 1; 85872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->free_slot = 1; 85972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 86072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->busy_slot = 0; 86172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->free_slot = 0; 86272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 86372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 86472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 86572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* The last TRB is a link TRB, not used for xfer */ 86672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if ((trbs_left <= 1) && usb_endpoint_xfer_isoc(dep->desc)) 86768e823e24aea5227eaf20d6435485e733109d113Felipe Balbi return; 86872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 86972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_for_each_entry_safe(req, n, &dep->request_list, list) { 870eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi unsigned length; 871eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dma_addr_t dma; 87272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 873eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (req->request.num_mapped_sgs > 0) { 874eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi struct usb_request *request = &req->request; 875eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi struct scatterlist *sg = request->sg; 876eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi struct scatterlist *s; 877eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi int i; 87872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 879eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi for_each_sg(sg, s, request->num_mapped_sgs, i) { 880eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi unsigned chain = true; 88172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 882eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi length = sg_dma_len(s); 883eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dma = sg_dma_address(s); 88472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 885eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (i == (request->num_mapped_sgs - 1) 886eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi || sg_is_last(s)) { 887eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi last_one = true; 888eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi chain = false; 889eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi } 89072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 891eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi trbs_left--; 892eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (!trbs_left) 893eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi last_one = true; 89472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 895eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (last_one) 896eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi chain = false; 89772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 898eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dwc3_prepare_one_trb(dep, req, dma, length, 899eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi last_one, chain); 90072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 901eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (last_one) 902eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi break; 903eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi } 90472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 905eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dma = req->request.dma; 906eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi length = req->request.length; 907eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi trbs_left--; 90872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 909eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (!trbs_left) 910eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi last_one = 1; 911879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi 912eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi /* Is this the last request? */ 913eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (list_is_last(&req->list, &dep->request_list)) 914eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi last_one = 1; 91572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 916eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dwc3_prepare_one_trb(dep, req, dma, length, 917eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi last_one, false); 91872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 919eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (last_one) 920eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi break; 92172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 92272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 92372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 92472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 92572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int __dwc3_gadget_kick_transfer(struct dwc3_ep *dep, u16 cmd_param, 92672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int start_new) 92772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 92872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 92972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req; 93072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 93172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 93272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 cmd; 93372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 93472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (start_new && (dep->flags & DWC3_EP_BUSY)) { 93572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s: endpoint busy\n", dep->name); 93672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EBUSY; 93772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 93872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags &= ~DWC3_EP_PENDING_REQUEST; 93972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 94072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 94172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * If we are getting here after a short-out-packet we don't enqueue any 94272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * new requests as we try to set the IOC bit only on the last request. 94372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 94472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (start_new) { 94572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (list_empty(&dep->req_queued)) 94672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_prepare_trbs(dep, start_new); 94772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 94872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* req points to the first request which will be sent */ 94972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req = next_request(&dep->req_queued); 95072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 95168e823e24aea5227eaf20d6435485e733109d113Felipe Balbi dwc3_prepare_trbs(dep, start_new); 95268e823e24aea5227eaf20d6435485e733109d113Felipe Balbi 95372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 95472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * req points to the first request where HWO changed 95572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * from 0 to 1 95672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 95768e823e24aea5227eaf20d6435485e733109d113Felipe Balbi req = next_request(&dep->req_queued); 95872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 95972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!req) { 96072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags |= DWC3_EP_PENDING_REQUEST; 96172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 96272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 96372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 96472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0, sizeof(params)); 965dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param0 = upper_32_bits(req->trb_dma); 966dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param1 = lower_32_bits(req->trb_dma); 96772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 96872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (start_new) 96972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd = DWC3_DEPCMD_STARTTRANSFER; 97072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi else 97172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd = DWC3_DEPCMD_UPDATETRANSFER; 97272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 97372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd |= DWC3_DEPCMD_PARAM(cmd_param); 97472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, cmd, ¶ms); 97572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret < 0) { 97672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "failed to send STARTTRANSFER command\n"); 97772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 97872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 97972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * FIXME we need to iterate over the list of requests 98072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * here and stop, unmap, free and del each of the linked 98172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * requests instead of we do now. 98272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 98372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_unmap_buffer_from_dma(req); 98472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_del(&req->list); 98572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 98672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 98772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 98872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags |= DWC3_EP_BUSY; 98972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->res_trans_idx = dwc3_gadget_ep_get_transfer_index(dwc, 99072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->number); 99125b8ff68bf1d4954d4a9dcb4862c6b6a53cb09e2Felipe Balbi 99225b8ff68bf1d4954d4a9dcb4862c6b6a53cb09e2Felipe Balbi WARN_ON_ONCE(!dep->res_trans_idx); 99325b8ff68bf1d4954d4a9dcb4862c6b6a53cb09e2Felipe Balbi 99472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 99572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 99672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 99772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int __dwc3_gadget_ep_queue(struct dwc3_ep *dep, struct dwc3_request *req) 99872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 99972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.actual = 0; 100072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.status = -EINPROGRESS; 100172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->direction = dep->direction; 100272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->epnum = dep->number; 100372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 100472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 100572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We only add to our list of requests now and 100672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * start consuming the list once we get XferNotReady 100772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * IRQ. 100872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 100972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * That way, we avoid doing anything that we don't need 101072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * to do now and defer it until the point we receive a 101172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * particular token from the Host side. 101272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 101372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * This will also avoid Host cancelling URBs due to too 101472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * many NACKs. 101572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 101672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_map_buffer_to_dma(req); 101772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_add_tail(&req->list, &dep->request_list); 101872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 101972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 102072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * There is one special case: XferNotReady with 102172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * empty list of requests. We need to kick the 102272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * transfer here in that situation, otherwise 102372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * we will be NAKing forever. 102472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 102572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * If we get XferNotReady before gadget driver 102672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * has a chance to queue a request, we will ACK 102772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * the IRQ but won't be able to receive the data 102872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * until the next request is queued. The following 102972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * code is handling exactly that. 103072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 103172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->flags & DWC3_EP_PENDING_REQUEST) { 103272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 103372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int start_trans; 103472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 103572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi start_trans = 1; 10367b7dd0253cd50fdc413b4ec199f1f3af08b7ba0dFelipe Balbi if (usb_endpoint_xfer_isoc(dep->desc) && 103772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags & DWC3_EP_BUSY) 103872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi start_trans = 0; 103972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 104072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = __dwc3_gadget_kick_transfer(dep, 0, start_trans); 104172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret && ret != -EBUSY) { 104272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 104372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 104472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "%s: failed to kick transfers\n", 104572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 104672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 104772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi }; 104872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 104972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 105072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 105172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 105272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_queue(struct usb_ep *ep, struct usb_request *request, 105372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi gfp_t gfp_flags) 105472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 105572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req = to_dwc3_request(request); 105672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = to_dwc3_ep(ep); 105772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 105872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 105972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 106072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 106172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 106272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 106372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dep->desc) { 106472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "trying to queue request %p to disabled %s\n", 106572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi request, ep->name); 106672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -ESHUTDOWN; 106772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 106872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 106972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "queing request %p to %s length %d\n", 107072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi request, ep->name, request->length); 107172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 107272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 107372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = __dwc3_gadget_ep_queue(dep, req); 107472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 107572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 107672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 107772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 107872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 107972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_dequeue(struct usb_ep *ep, 108072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct usb_request *request) 108172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 108272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req = to_dwc3_request(request); 108372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *r = NULL; 108472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 108572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = to_dwc3_ep(ep); 108672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 108772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 108872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 108972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret = 0; 109072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 109172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 109272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 109372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_for_each_entry(r, &dep->request_list, list) { 109472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (r == req) 109572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 109672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 109772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 109872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (r != req) { 109972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_for_each_entry(r, &dep->req_queued, list) { 110072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (r == req) 110172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 110272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 110372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (r == req) { 110472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* wait until it is processed */ 110572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_stop_active_transfer(dwc, dep->number); 110672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto out0; 110772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 110872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "request %p was not queued to %s\n", 110972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi request, ep->name); 111072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EINVAL; 111172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto out0; 111272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 111372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 111472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* giveback the request */ 111572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_giveback(dep, req, -ECONNRESET); 111672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 111772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiout0: 111872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 111972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 112072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 112172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 112272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 112372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiint __dwc3_gadget_ep_set_halt(struct dwc3_ep *dep, int value) 112472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 112572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 112672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 112772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 112872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 112972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0x00, sizeof(params)); 113072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 113172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (value) { 11320b7836a9eb32f626ffd3fe3045e8c618cb8ed965Felipe Balbi if (dep->number == 0 || dep->number == 1) { 11330b7836a9eb32f626ffd3fe3045e8c618cb8ed965Felipe Balbi /* 11340b7836a9eb32f626ffd3fe3045e8c618cb8ed965Felipe Balbi * Whenever EP0 is stalled, we will restart 11350b7836a9eb32f626ffd3fe3045e8c618cb8ed965Felipe Balbi * the state machine, thus moving back to 11360b7836a9eb32f626ffd3fe3045e8c618cb8ed965Felipe Balbi * Setup Phase 11370b7836a9eb32f626ffd3fe3045e8c618cb8ed965Felipe Balbi */ 11380b7836a9eb32f626ffd3fe3045e8c618cb8ed965Felipe Balbi dwc->ep0state = EP0_SETUP_PHASE; 11390b7836a9eb32f626ffd3fe3045e8c618cb8ed965Felipe Balbi } 114072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 114172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, 114272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEPCMD_SETSTALL, ¶ms); 114372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 114472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to %s STALL on %s\n", 114572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi value ? "set" : "clear", 114672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 114772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi else 114872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags |= DWC3_EP_STALL; 114972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 11505275455a6e6ae6b57303834b0afd267bb9657ffcPaul Zimmerman if (dep->flags & DWC3_EP_WEDGE) 11515275455a6e6ae6b57303834b0afd267bb9657ffcPaul Zimmerman return 0; 11525275455a6e6ae6b57303834b0afd267bb9657ffcPaul Zimmerman 115372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, 115472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEPCMD_CLEARSTALL, ¶ms); 115572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 115672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to %s STALL on %s\n", 115772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi value ? "set" : "clear", 115872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 115972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi else 116072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags &= ~DWC3_EP_STALL; 116172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 11625275455a6e6ae6b57303834b0afd267bb9657ffcPaul Zimmerman 116372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 116472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 116572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 116672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_set_halt(struct usb_ep *ep, int value) 116772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 116872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = to_dwc3_ep(ep); 116972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 117072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 117172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 117272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 117372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 117472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 117572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 117672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 117772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (usb_endpoint_xfer_isoc(dep->desc)) { 117872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "%s is of Isochronous type\n", dep->name); 117972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EINVAL; 118072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto out; 118172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 118272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 118372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = __dwc3_gadget_ep_set_halt(dep, value); 118472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiout: 118572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 118672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 118772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 118872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 118972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 119072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_set_wedge(struct usb_ep *ep) 119172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 119272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = to_dwc3_ep(ep); 119372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 119472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags |= DWC3_EP_WEDGE; 119572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 11965275455a6e6ae6b57303834b0afd267bb9657ffcPaul Zimmerman return dwc3_gadget_ep_set_halt(ep, 1); 119772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 119872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 119972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 120072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 120172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic struct usb_endpoint_descriptor dwc3_gadget_ep0_desc = { 120272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .bLength = USB_DT_ENDPOINT_SIZE, 120372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .bDescriptorType = USB_DT_ENDPOINT, 120472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .bmAttributes = USB_ENDPOINT_XFER_CONTROL, 120572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi}; 120672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 120772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic const struct usb_ep_ops dwc3_gadget_ep0_ops = { 120872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .enable = dwc3_gadget_ep0_enable, 120972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .disable = dwc3_gadget_ep0_disable, 121072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .alloc_request = dwc3_gadget_ep_alloc_request, 121172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .free_request = dwc3_gadget_ep_free_request, 121272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .queue = dwc3_gadget_ep0_queue, 121372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .dequeue = dwc3_gadget_ep_dequeue, 121472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .set_halt = dwc3_gadget_ep_set_halt, 121572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .set_wedge = dwc3_gadget_ep_set_wedge, 121672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi}; 121772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 121872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic const struct usb_ep_ops dwc3_gadget_ep_ops = { 121972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .enable = dwc3_gadget_ep_enable, 122072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .disable = dwc3_gadget_ep_disable, 122172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .alloc_request = dwc3_gadget_ep_alloc_request, 122272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .free_request = dwc3_gadget_ep_free_request, 122372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .queue = dwc3_gadget_ep_queue, 122472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .dequeue = dwc3_gadget_ep_dequeue, 122572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .set_halt = dwc3_gadget_ep_set_halt, 122672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .set_wedge = dwc3_gadget_ep_set_wedge, 122772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi}; 122872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 122972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 123072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 123172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_get_frame(struct usb_gadget *g) 123272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 123372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 123472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 123572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 123672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 123772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return DWC3_DSTS_SOFFN(reg); 123872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 123972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 124072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_wakeup(struct usb_gadget *g) 124172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 124272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 124372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 124472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long timeout; 124572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 124672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 124772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 124872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 124972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret = 0; 125072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 125172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 link_state; 125272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 speed; 125372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 125472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 125572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 125672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 125772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * According to the Databook Remote wakeup request should 125872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * be issued only when the device is in early suspend state. 125972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 126072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We can check that via USB Link State bits in DSTS register. 126172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 126272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 126372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 126472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi speed = reg & DWC3_DSTS_CONNECTSPD; 126572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (speed == DWC3_DSTS_SUPERSPEED) { 126672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "no wakeup on SuperSpeed\n"); 126772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EINVAL; 126872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto out; 126972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 127072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 127172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi link_state = DWC3_DSTS_USBLNKST(reg); 127272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 127372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (link_state) { 127472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_LINK_STATE_RX_DET: /* in HS, means Early Suspend */ 127572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_LINK_STATE_U3: /* in HS, means SUSPEND */ 127672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 127772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 127872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "can't wakeup from link state %d\n", 127972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi link_state); 128072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EINVAL; 128172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto out; 128272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 128372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 12848598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi ret = dwc3_gadget_set_link_state(dwc, DWC3_LINK_STATE_RECOV); 12858598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi if (ret < 0) { 12868598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi dev_err(dwc->dev, "failed to put link in Recovery\n"); 12878598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi goto out; 12888598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi } 128972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 129072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* write zeroes to Link Change Request */ 129172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DCTL_ULSTCHNGREQ_MASK; 129272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 129372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 129472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* pool until Link State change to ON */ 129572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi timeout = jiffies + msecs_to_jiffies(100); 129672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 129772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi while (!(time_after(jiffies, timeout))) { 129872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 129972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 130072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* in HS, means ON */ 130172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (DWC3_DSTS_USBLNKST(reg) == DWC3_LINK_STATE_U0) 130272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 130372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 130472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 130572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (DWC3_DSTS_USBLNKST(reg) != DWC3_LINK_STATE_U0) { 130672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to send remote wakeup\n"); 130772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EINVAL; 130872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 130972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 131072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiout: 131172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 131272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 131372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 131472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 131572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 131672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_set_selfpowered(struct usb_gadget *g, 131772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int is_selfpowered) 131872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 131972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 132072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 132172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->is_selfpowered = !!is_selfpowered; 132272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 132372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 132472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 132572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 132672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_run_stop(struct dwc3 *dwc, int is_on) 132772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 132872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 132961d58242f634642de42d6a4098913b7254a65053Sebastian Andrzej Siewior u32 timeout = 500; 133072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 133172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 13328db7ed15f2557e26371e4b2d98fee290d992b715Felipe Balbi if (is_on) { 13338db7ed15f2557e26371e4b2d98fee290d992b715Felipe Balbi reg &= ~DWC3_DCTL_TRGTULST_MASK; 13348db7ed15f2557e26371e4b2d98fee290d992b715Felipe Balbi reg |= (DWC3_DCTL_RUN_STOP 13358db7ed15f2557e26371e4b2d98fee290d992b715Felipe Balbi | DWC3_DCTL_TRGTULST_RX_DET); 13368db7ed15f2557e26371e4b2d98fee290d992b715Felipe Balbi } else { 133772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DCTL_RUN_STOP; 13388db7ed15f2557e26371e4b2d98fee290d992b715Felipe Balbi } 133972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 134072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 134172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 134272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi do { 134372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 134472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (is_on) { 134572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(reg & DWC3_DSTS_DEVCTRLHLT)) 134672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 134772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 134872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (reg & DWC3_DSTS_DEVCTRLHLT) 134972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 135072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 135172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi timeout--; 135272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!timeout) 135372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 135461d58242f634642de42d6a4098913b7254a65053Sebastian Andrzej Siewior udelay(1); 135572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } while (1); 135672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 135772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "gadget %s data soft-%s\n", 135872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver 135972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ? dwc->gadget_driver->function : "no-function", 136072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi is_on ? "connect" : "disconnect"); 136172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 136272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 136372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_pullup(struct usb_gadget *g, int is_on) 136472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 136572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 136672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 136772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 136872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi is_on = !!is_on; 136972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 137072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 137172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_run_stop(dwc, is_on); 137272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 137372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 137472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 137572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 137672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 137772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_start(struct usb_gadget *g, 137872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct usb_gadget_driver *driver) 137972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 138072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 138172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 138272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 138372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret = 0; 138472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 138572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 138672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 138772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 138872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dwc->gadget_driver) { 138972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "%s is already bound to %s\n", 139072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.name, 139172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver->driver.name); 139272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EBUSY; 139372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto err0; 139472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 139572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 139672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver = driver; 139772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.dev.driver = &driver->driver; 139872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 139972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCFG); 140072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~(DWC3_DCFG_SPEED_MASK); 14016c167fc9b0c23ead791edb94cf4debb6b8e534b5Felipe Balbi reg |= dwc->maximum_speed; 140272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCFG, reg); 140372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1404b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman dwc->start_config_issued = false; 1405b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman 140672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* Start with SuperSpeed Default */ 140772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(512); 140872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 140972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[0]; 1410c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL); 141172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 141272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to enable %s\n", dep->name); 141372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto err0; 141472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 141572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 141672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[1]; 1417c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL); 141872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 141972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to enable %s\n", dep->name); 142072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto err1; 142172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 142272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 142372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* begin to receive SETUP packets */ 1424c7fcdeb2627c46b7ec3f0bcb2054b10405f9a70eFelipe Balbi dwc->ep0state = EP0_SETUP_PHASE; 142572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_ep0_out_start(dwc); 142672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 142772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 142872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 142972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 143072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 143172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbierr1: 143272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi __dwc3_gadget_ep_disable(dwc->eps[0]); 143372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 143472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbierr0: 143572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 143672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 143772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 143872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 143972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 144072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_stop(struct usb_gadget *g, 144172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct usb_gadget_driver *driver) 144272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 144372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 144472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 144572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 144672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 144772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 144872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi __dwc3_gadget_ep_disable(dwc->eps[0]); 144972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi __dwc3_gadget_ep_disable(dwc->eps[1]); 145072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 145172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver = NULL; 145272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.dev.driver = NULL; 145372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 145472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 145572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 145672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 145772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 145872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic const struct usb_gadget_ops dwc3_gadget_ops = { 145972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .get_frame = dwc3_gadget_get_frame, 146072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .wakeup = dwc3_gadget_wakeup, 146172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .set_selfpowered = dwc3_gadget_set_selfpowered, 146272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .pullup = dwc3_gadget_pullup, 146372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .udc_start = dwc3_gadget_start, 146472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .udc_stop = dwc3_gadget_stop, 146572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi}; 146672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 146772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 146872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 146972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int __devinit dwc3_gadget_init_endpoints(struct dwc3 *dwc) 147072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 147172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 147272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 epnum; 147372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 147472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi INIT_LIST_HEAD(&dwc->gadget.ep_list); 147572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 147672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi for (epnum = 0; epnum < DWC3_ENDPOINTS_NUM; epnum++) { 147772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = kzalloc(sizeof(*dep), GFP_KERNEL); 147872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dep) { 147972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "can't allocate endpoint %d\n", 148072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi epnum); 148172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -ENOMEM; 148272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 148372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 148472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->dwc = dwc; 148572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->number = epnum; 148672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->eps[epnum] = dep; 148772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 148872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi snprintf(dep->name, sizeof(dep->name), "ep%d%s", epnum >> 1, 148972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi (epnum & 1) ? "in" : "out"); 149072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->endpoint.name = dep->name; 149172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->direction = (epnum & 1); 149272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 149372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (epnum == 0 || epnum == 1) { 149472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->endpoint.maxpacket = 512; 149572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->endpoint.ops = &dwc3_gadget_ep0_ops; 149672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!epnum) 149772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ep0 = &dep->endpoint; 149872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 149972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 150072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 150172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->endpoint.maxpacket = 1024; 150212d36c16bde3ee0643d705caa87723de536dbe49Sebastian Andrzej Siewior dep->endpoint.max_streams = 15; 150372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->endpoint.ops = &dwc3_gadget_ep_ops; 150472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_add_tail(&dep->endpoint.ep_list, 150572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi &dwc->gadget.ep_list); 150672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 150772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_alloc_trb_pool(dep); 150825b8ff68bf1d4954d4a9dcb4862c6b6a53cb09e2Felipe Balbi if (ret) 150972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 151072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 151125b8ff68bf1d4954d4a9dcb4862c6b6a53cb09e2Felipe Balbi 151272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi INIT_LIST_HEAD(&dep->request_list); 151372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi INIT_LIST_HEAD(&dep->req_queued); 151472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 151572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 151672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 151772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 151872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 151972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_free_endpoints(struct dwc3 *dwc) 152072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 152172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 152272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 epnum; 152372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 152472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi for (epnum = 0; epnum < DWC3_ENDPOINTS_NUM; epnum++) { 152572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[epnum]; 152672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_free_trb_pool(dep); 152772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 152872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (epnum != 0 && epnum != 1) 152972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_del(&dep->endpoint.ep_list); 153072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 153172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi kfree(dep); 153272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 153372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 153472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 153572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_release(struct device *dev) 153672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 153772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dev, "%s\n", __func__); 153872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 153972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 154072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 154172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_cleanup_done_reqs(struct dwc3 *dwc, struct dwc3_ep *dep, 154272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct dwc3_event_depevt *event, int status) 154372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 154472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req; 154572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_trb trb; 154672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned int count; 154772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned int s_pkt = 0; 154872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 154972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi do { 155072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req = next_request(&dep->req_queued); 1551d39ee7be2aaf0a53d7b5f43c13571bac95f7cc0cSebastian Andrzej Siewior if (!req) { 1552d39ee7be2aaf0a53d7b5f43c13571bac95f7cc0cSebastian Andrzej Siewior WARN_ON_ONCE(1); 1553d39ee7be2aaf0a53d7b5f43c13571bac95f7cc0cSebastian Andrzej Siewior return 1; 1554d39ee7be2aaf0a53d7b5f43c13571bac95f7cc0cSebastian Andrzej Siewior } 155572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 155672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_trb_to_nat(req->trb, &trb); 155772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 15580d2f4758530d1598087d1d2f3e75b4f7d17fc6c7Sebastian Andrzej Siewior if (trb.hwo && status != -ESHUTDOWN) 15590d2f4758530d1598087d1d2f3e75b4f7d17fc6c7Sebastian Andrzej Siewior /* 15600d2f4758530d1598087d1d2f3e75b4f7d17fc6c7Sebastian Andrzej Siewior * We continue despite the error. There is not much we 15610d2f4758530d1598087d1d2f3e75b4f7d17fc6c7Sebastian Andrzej Siewior * can do. If we don't clean in up we loop for ever. If 15620d2f4758530d1598087d1d2f3e75b4f7d17fc6c7Sebastian Andrzej Siewior * we skip the TRB than it gets overwritten reused after 15630d2f4758530d1598087d1d2f3e75b4f7d17fc6c7Sebastian Andrzej Siewior * a while since we use them in a ring buffer. a BUG() 15640d2f4758530d1598087d1d2f3e75b4f7d17fc6c7Sebastian Andrzej Siewior * would help. Lets hope that if this occures, someone 15650d2f4758530d1598087d1d2f3e75b4f7d17fc6c7Sebastian Andrzej Siewior * fixes the root cause instead of looking away :) 15660d2f4758530d1598087d1d2f3e75b4f7d17fc6c7Sebastian Andrzej Siewior */ 156772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "%s's TRB (%p) still owned by HW\n", 156872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name, req->trb); 156972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi count = trb.length; 157072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 157172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->direction) { 157272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (count) { 157372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "incomplete IN transfer %s\n", 157472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 157572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi status = -ECONNRESET; 157672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 157772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 157872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (count && (event->status & DEPEVT_STATUS_SHORT)) 157972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi s_pkt = 1; 158072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 158172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 158272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 158372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We assume here we will always receive the entire data block 158472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * which we should receive. Meaning, if we program RX to 158572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * receive 4K but we receive only 2K, we assume that's all we 158672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * should receive and we simply bounce the request back to the 158772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * gadget driver for further processing. 158872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 158972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.actual += req->request.length - count; 159072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_giveback(dep, req, status); 159172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (s_pkt) 159272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 159372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if ((event->status & DEPEVT_STATUS_LST) && trb.lst) 159472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 159572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if ((event->status & DEPEVT_STATUS_IOC) && trb.ioc) 159672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 159772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } while (1); 159872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 159972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if ((event->status & DEPEVT_STATUS_IOC) && trb.ioc) 160072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 160172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 1; 160272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 160372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 160472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_endpoint_transfer_complete(struct dwc3 *dwc, 160572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep, const struct dwc3_event_depevt *event, 160672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int start_new) 160772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 160872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned status = 0; 160972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int clean_busy; 161072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 161172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (event->status & DEPEVT_STATUS_BUSERR) 161272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi status = -ECONNRESET; 161372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 161472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi clean_busy = dwc3_cleanup_done_reqs(dwc, dep, event, status); 1615a1ae9be5fc137d7e911a77ef408273ff55a53a39Sebastian Andrzej Siewior if (clean_busy) { 161672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags &= ~DWC3_EP_BUSY; 1617a1ae9be5fc137d7e911a77ef408273ff55a53a39Sebastian Andrzej Siewior dep->res_trans_idx = 0; 1618a1ae9be5fc137d7e911a77ef408273ff55a53a39Sebastian Andrzej Siewior } 1619fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1620fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi /* 1621fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * WORKAROUND: This is the 2nd half of U1/U2 -> U0 workaround. 1622fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * See dwc3_gadget_linksts_change_interrupt() for 1st half. 1623fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi */ 1624fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi if (dwc->revision < DWC3_REVISION_183A) { 1625fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi u32 reg; 1626fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi int i; 1627fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1628fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi for (i = 0; i < DWC3_ENDPOINTS_NUM; i++) { 1629fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi struct dwc3_ep *dep = dwc->eps[i]; 1630fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1631fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) 1632fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi continue; 1633fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1634fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi if (!list_empty(&dep->req_queued)) 1635fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi return; 1636fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi } 1637fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1638fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 1639fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi reg |= dwc->u1u2; 1640fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 1641fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1642fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi dwc->u1u2 = 0; 1643fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi } 164472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 164572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 164672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_start_isoc(struct dwc3 *dwc, 164772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep, const struct dwc3_event_depevt *event) 164872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 164972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 uf; 165072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 165172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (list_empty(&dep->request_list)) { 165272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "ISOC ep %s run out for requests.\n", 165372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 165472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 165572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 165672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 165772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (event->parameters) { 165872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 mask; 165972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 166072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi mask = ~(dep->interval - 1); 166172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi uf = event->parameters & mask; 166272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 4 micro frames in the future */ 166372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi uf += dep->interval * 4; 166472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 166572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi uf = 0; 166672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 166772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 166872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi __dwc3_gadget_kick_transfer(dep, uf, 1); 166972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 167072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 167172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_process_ep_cmd_complete(struct dwc3_ep *dep, 167272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct dwc3_event_depevt *event) 167372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 167472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 167572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_event_depevt mod_ev = *event; 167672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 167772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 167872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We were asked to remove one requests. It is possible that this 167972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * request and a few other were started together and have the same 168072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * transfer index. Since we stopped the complete endpoint we don't 168172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * know how many requests were already completed (and not yet) 168272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * reported and how could be done (later). We purge them all until 168372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * the end of the list. 168472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 168572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi mod_ev.status = DEPEVT_STATUS_LST; 168672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_cleanup_done_reqs(dwc, dep, &mod_ev, -ESHUTDOWN); 168772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags &= ~DWC3_EP_BUSY; 168872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* pending requets are ignored and are queued on XferNotReady */ 168972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 169072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 169172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_ep_cmd_compl(struct dwc3_ep *dep, 169272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct dwc3_event_depevt *event) 169372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 169472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 param = event->parameters; 169572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 cmd_type = (param >> 8) & ((1 << 5) - 1); 169672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 169772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (cmd_type) { 169872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_ENDTRANSFER: 169972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_process_ep_cmd_complete(dep, event); 170072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 170172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_STARTTRANSFER: 170272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->res_trans_idx = param & 0x7f; 170372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 170472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 170572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi printk(KERN_ERR "%s() unknown /unexpected type: %d\n", 170672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi __func__, cmd_type); 170772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 170872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi }; 170972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 171072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 171172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_endpoint_interrupt(struct dwc3 *dwc, 171272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct dwc3_event_depevt *event) 171372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 171472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 171572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 epnum = event->endpoint_number; 171672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 171772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[epnum]; 171872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 171972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s: %s\n", dep->name, 172072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_ep_event_string(event->endpoint_event)); 172172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 172272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (epnum == 0 || epnum == 1) { 172372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_ep0_interrupt(dwc, event); 172472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 172572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 172672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 172772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (event->endpoint_event) { 172872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPEVT_XFERCOMPLETE: 172972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (usb_endpoint_xfer_isoc(dep->desc)) { 173072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "%s is an Isochronous endpoint\n", 173172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 173272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 173372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 173472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 173572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_endpoint_transfer_complete(dwc, dep, event, 1); 173672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 173772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPEVT_XFERINPROGRESS: 173872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!usb_endpoint_xfer_isoc(dep->desc)) { 173972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "%s is not an Isochronous endpoint\n", 174072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 174172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 174272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 174372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 174472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_endpoint_transfer_complete(dwc, dep, event, 0); 174572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 174672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPEVT_XFERNOTREADY: 174772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (usb_endpoint_xfer_isoc(dep->desc)) { 174872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_start_isoc(dwc, dep, event); 174972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 175072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 175172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 175272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s: reason %s\n", 175340aa41fba348bc5bd19ff5bcf2b03d67bb01d1ceFelipe Balbi dep->name, event->status & 175440aa41fba348bc5bd19ff5bcf2b03d67bb01d1ceFelipe Balbi DEPEVT_STATUS_TRANSFER_ACTIVE 175572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ? "Transfer Active" 175672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi : "Transfer Not Active"); 175772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 175872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = __dwc3_gadget_kick_transfer(dep, 0, 1); 175972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!ret || ret == -EBUSY) 176072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 176172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 176272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "%s: failed to kick transfers\n", 176372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 176472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 176572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 176672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 1767879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi case DWC3_DEPEVT_STREAMEVT: 1768879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi if (!usb_endpoint_xfer_bulk(dep->desc)) { 1769879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dev_err(dwc->dev, "Stream event for non-Bulk %s\n", 1770879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dep->name); 1771879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi return; 1772879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi } 1773879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi 1774879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi switch (event->status) { 1775879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi case DEPEVT_STREAMEVT_FOUND: 1776879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dev_vdbg(dwc->dev, "Stream %d found and started\n", 1777879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi event->parameters); 1778879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi 1779879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi break; 1780879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi case DEPEVT_STREAMEVT_NOTFOUND: 1781879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi /* FALLTHROUGH */ 1782879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi default: 1783879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dev_dbg(dwc->dev, "Couldn't find suitable stream\n"); 1784879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi } 1785879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi break; 178672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPEVT_RXTXFIFOEVT: 178772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "%s FIFO Overrun\n", dep->name); 178872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 178972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPEVT_EPCMDCMPLT: 179072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_ep_cmd_compl(dep, event); 179172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 179272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 179372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 179472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 179572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_disconnect_gadget(struct dwc3 *dwc) 179672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 179772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dwc->gadget_driver && dwc->gadget_driver->disconnect) { 179872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock(&dwc->lock); 179972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver->disconnect(&dwc->gadget); 180072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock(&dwc->lock); 180172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 180272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 180372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 180472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_stop_active_transfer(struct dwc3 *dwc, u32 epnum) 180572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 180672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 180772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 180872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 cmd; 180972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 181072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 181172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[epnum]; 181272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1813624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior WARN_ON(!dep->res_trans_idx); 181472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->res_trans_idx) { 181572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd = DWC3_DEPCMD_ENDTRANSFER; 181672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd |= DWC3_DEPCMD_HIPRI_FORCERM | DWC3_DEPCMD_CMDIOC; 181772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd |= DWC3_DEPCMD_PARAM(dep->res_trans_idx); 181872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0, sizeof(params)); 181972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, cmd, ¶ms); 182072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi WARN_ON_ONCE(ret); 1821a1ae9be5fc137d7e911a77ef408273ff55a53a39Sebastian Andrzej Siewior dep->res_trans_idx = 0; 182272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 182372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 182472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 182572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_stop_active_transfers(struct dwc3 *dwc) 182672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 182772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 epnum; 182872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 182972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi for (epnum = 2; epnum < DWC3_ENDPOINTS_NUM; epnum++) { 183072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 183172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 183272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[epnum]; 183372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) 183472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi continue; 183572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1836624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior dwc3_remove_requests(dwc, dep); 183772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 183872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 183972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 184072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_clear_stall_all_ep(struct dwc3 *dwc) 184172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 184272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 epnum; 184372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 184472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi for (epnum = 1; epnum < DWC3_ENDPOINTS_NUM; epnum++) { 184572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 184672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 184772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 184872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 184972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[epnum]; 185072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 185172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(dep->flags & DWC3_EP_STALL)) 185272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi continue; 185372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 185472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags &= ~DWC3_EP_STALL; 185572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 185672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0, sizeof(params)); 185772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, 185872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEPCMD_CLEARSTALL, ¶ms); 185972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi WARN_ON_ONCE(ret); 186072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 186172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 186272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 186372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_disconnect_interrupt(struct dwc3 *dwc) 186472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 186572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s\n", __func__); 186672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#if 0 186772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi XXX 186872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi U1/U2 is powersave optimization. Skip it for now. Anyway we need to 186972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi enable it before we can disable it. 187072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 187172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 187272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DCTL_INITU1ENA; 187372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 187472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 187572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DCTL_INITU2ENA; 187672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 187772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#endif 187872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 187972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_stop_active_transfers(dwc); 188072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_disconnect_gadget(dwc); 1881b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman dwc->start_config_issued = false; 188272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 188372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_UNKNOWN; 1884df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi dwc->setup_packet_pending = false; 188572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 188672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 188772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_usb3_phy_power(struct dwc3 *dwc, int on) 188872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 188972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 189072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 189172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(0)); 189272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 189372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (on) 189472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_GUSB3PIPECTL_SUSPHY; 189572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi else 189672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg |= DWC3_GUSB3PIPECTL_SUSPHY; 189772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 189872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg); 189972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 190072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 190172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_usb2_phy_power(struct dwc3 *dwc, int on) 190272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 190372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 190472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 190572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0)); 190672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 190772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (on) 190872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_GUSB2PHYCFG_SUSPHY; 190972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi else 191072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg |= DWC3_GUSB2PHYCFG_SUSPHY; 191172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 191272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg); 191372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 191472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 191572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_reset_interrupt(struct dwc3 *dwc) 191672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 191772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 191872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 191972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s\n", __func__); 192072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1921df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi /* 1922df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * WORKAROUND: DWC3 revisions <1.88a have an issue which 1923df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * would cause a missing Disconnect Event if there's a 1924df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * pending Setup Packet in the FIFO. 1925df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * 1926df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * There's no suggested workaround on the official Bug 1927df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * report, which states that "unless the driver/application 1928df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * is doing any special handling of a disconnect event, 1929df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * there is no functional issue". 1930df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * 1931df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * Unfortunately, it turns out that we _do_ some special 1932df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * handling of a disconnect event, namely complete all 1933df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * pending transfers, notify gadget driver of the 1934df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * disconnection, and so on. 1935df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * 1936df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * Our suggested workaround is to follow the Disconnect 1937df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * Event steps here, instead, based on a setup_packet_pending 1938df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * flag. Such flag gets set whenever we have a XferNotReady 1939df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * event on EP0 and gets cleared on XferComplete for the 1940df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * same endpoint. 1941df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * 1942df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * Refers to: 1943df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * 1944df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * STAR#9000466709: RTL: Device : Disconnect event not 1945df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * generated if setup packet pending in FIFO 1946df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi */ 1947df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi if (dwc->revision < DWC3_REVISION_188A) { 1948df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi if (dwc->setup_packet_pending) 1949df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi dwc3_gadget_disconnect_interrupt(dwc); 1950df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi } 1951df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi 1952961906edb549c95f4cc33e4f3dbfd0fcc364954dFelipe Balbi /* after reset -> Default State */ 1953961906edb549c95f4cc33e4f3dbfd0fcc364954dFelipe Balbi dwc->dev_state = DWC3_DEFAULT_STATE; 1954961906edb549c95f4cc33e4f3dbfd0fcc364954dFelipe Balbi 195572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* Enable PHYs */ 195672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_usb2_phy_power(dwc, true); 195772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_usb3_phy_power(dwc, true); 195872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 195972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dwc->gadget.speed != USB_SPEED_UNKNOWN) 196072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_disconnect_gadget(dwc); 196172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 196272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 196372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DCTL_TSTCTRL_MASK; 196472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 196572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 196672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_stop_active_transfers(dwc); 196772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_clear_stall_all_ep(dwc); 1968b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman dwc->start_config_issued = false; 196972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 197072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* Reset device address to zero */ 197172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCFG); 197272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~(DWC3_DCFG_DEVADDR_MASK); 197372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCFG, reg); 197472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 197572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 197672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_update_ram_clk_sel(struct dwc3 *dwc, u32 speed) 197772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 197872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 197972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 usb30_clock = DWC3_GCTL_CLK_BUS; 198072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 198172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 198272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We change the clock only at SS but I dunno why I would want to do 198372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * this. Maybe it becomes part of the power saving plan. 198472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 198572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 198672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (speed != DWC3_DSTS_SUPERSPEED) 198772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 198872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 198972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 199072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * RAMClkSel is reset to 0 after USB reset, so it must be reprogrammed 199172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * each time on Connect Done. 199272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 199372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!usb30_clock) 199472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 199572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 199672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_GCTL); 199772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg |= DWC3_GCTL_RAMCLKSEL(usb30_clock); 199872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_GCTL, reg); 199972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 200072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 200172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_disable_phy(struct dwc3 *dwc, u8 speed) 200272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 200372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (speed) { 200472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_SPEED_SUPER: 200572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_usb2_phy_power(dwc, false); 200672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 200772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_SPEED_HIGH: 200872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_SPEED_FULL: 200972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_SPEED_LOW: 201072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_usb3_phy_power(dwc, false); 201172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 201272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 201372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 201472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 201572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_conndone_interrupt(struct dwc3 *dwc) 201672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 201772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 201872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 201972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 202072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 202172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 speed; 202272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 202372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s\n", __func__); 202472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 202572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0x00, sizeof(params)); 202672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 202772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 202872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi speed = reg & DWC3_DSTS_CONNECTSPD; 202972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->speed = speed; 203072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 203172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_update_ram_clk_sel(dwc, speed); 203272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 203372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (speed) { 203472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DCFG_SUPERSPEED: 203505870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi /* 203605870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * WORKAROUND: DWC3 revisions <1.90a have an issue which 203705870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * would cause a missing USB3 Reset event. 203805870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * 203905870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * In such situations, we should force a USB3 Reset 204005870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * event by calling our dwc3_gadget_reset_interrupt() 204105870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * routine. 204205870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * 204305870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * Refers to: 204405870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * 204505870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * STAR#9000483510: RTL: SS : USB3 reset event may 204605870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * not be generated always when the link enters poll 204705870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi */ 204805870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi if (dwc->revision < DWC3_REVISION_190A) 204905870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi dwc3_gadget_reset_interrupt(dwc); 205005870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi 205172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(512); 205272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ep0->maxpacket = 512; 205372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_SUPER; 205472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 205572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DCFG_HIGHSPEED: 205672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(64); 205772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ep0->maxpacket = 64; 205872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_HIGH; 205972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 206072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DCFG_FULLSPEED2: 206172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DCFG_FULLSPEED1: 206272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(64); 206372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ep0->maxpacket = 64; 206472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_FULL; 206572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 206672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DCFG_LOWSPEED: 206772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(8); 206872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ep0->maxpacket = 8; 206972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_LOW; 207072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 207172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 207272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 207372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* Disable unneded PHY */ 207472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_disable_phy(dwc, dwc->gadget.speed); 207572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 207672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[0]; 2077c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL); 207872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 207972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to enable %s\n", dep->name); 208072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 208172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 208272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 208372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[1]; 2084c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL); 208572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 208672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to enable %s\n", dep->name); 208772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 208872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 208972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 209072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 209172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Configure PHY via GUSB3PIPECTLn if required. 209272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 209372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Update GTXFIFOSIZn 209472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 209572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * In both cases reset values should be sufficient. 209672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 209772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 209872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 209972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_wakeup_interrupt(struct dwc3 *dwc) 210072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 210172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s\n", __func__); 210272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 210372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 210472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * TODO take core out of low power mode when that's 210572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * implemented. 210672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 210772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 210872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver->resume(&dwc->gadget); 210972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 211072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 211172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_linksts_change_interrupt(struct dwc3 *dwc, 211272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned int evtinfo) 211372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 2114fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi enum dwc3_link_state next = evtinfo & DWC3_LINK_STATE_MASK; 2115fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 2116fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi /* 2117fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * WORKAROUND: DWC3 Revisions <1.83a have an issue which, depending 2118fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * on the link partner, the USB session might do multiple entry/exit 2119fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * of low power states before a transfer takes place. 2120fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * 2121fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * Due to this problem, we might experience lower throughput. The 2122fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * suggested workaround is to disable DCTL[12:9] bits if we're 2123fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * transitioning from U1/U2 to U0 and enable those bits again 2124fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * after a transfer completes and there are no pending transfers 2125fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * on any of the enabled endpoints. 2126fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * 2127fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * This is the first half of that workaround. 2128fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * 2129fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * Refers to: 2130fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * 2131fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * STAR#9000446952: RTL: Device SS : if U1/U2 ->U0 takes >128us 2132fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * core send LGO_Ux entering U0 2133fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi */ 2134fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi if (dwc->revision < DWC3_REVISION_183A) { 2135fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi if (next == DWC3_LINK_STATE_U0) { 2136fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi u32 u1u2; 2137fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi u32 reg; 2138fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 2139fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi switch (dwc->link_state) { 2140fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi case DWC3_LINK_STATE_U1: 2141fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi case DWC3_LINK_STATE_U2: 2142fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 2143fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi u1u2 = reg & (DWC3_DCTL_INITU2ENA 2144fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi | DWC3_DCTL_ACCEPTU2ENA 2145fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi | DWC3_DCTL_INITU1ENA 2146fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi | DWC3_DCTL_ACCEPTU1ENA); 2147fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 2148fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi if (!dwc->u1u2) 2149fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi dwc->u1u2 = reg & u1u2; 2150fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 2151fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi reg &= ~u1u2; 2152fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 2153fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 2154fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi break; 2155fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi default: 2156fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi /* do nothing */ 2157fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi break; 2158fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi } 2159fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi } 2160fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi } 2161fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 2162fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi dwc->link_state = next; 2163019ac83252dc2b356cb0ca81c25a077ec90309e7Felipe Balbi 2164019ac83252dc2b356cb0ca81c25a077ec90309e7Felipe Balbi dev_vdbg(dwc->dev, "%s link %d\n", __func__, dwc->link_state); 216572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 216672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 216772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_interrupt(struct dwc3 *dwc, 216872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct dwc3_event_devt *event) 216972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 217072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (event->type) { 217172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_DISCONNECT: 217272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_disconnect_interrupt(dwc); 217372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 217472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_RESET: 217572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_reset_interrupt(dwc); 217672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 217772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_CONNECT_DONE: 217872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_conndone_interrupt(dwc); 217972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 218072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_WAKEUP: 218172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_wakeup_interrupt(dwc); 218272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 218372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_LINK_STATUS_CHANGE: 218472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_linksts_change_interrupt(dwc, event->event_info); 218572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 218672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_EOPF: 218772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "End of Periodic Frame\n"); 218872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 218972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_SOF: 219072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "Start of Periodic Frame\n"); 219172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 219272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_ERRATIC_ERROR: 219372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "Erratic Error\n"); 219472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 219572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_CMD_CMPL: 219672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "Command Complete\n"); 219772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 219872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_OVERFLOW: 219972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "Overflow\n"); 220072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 220172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 220272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "UNKNOWN IRQ %d\n", event->type); 220372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 220472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 220572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 220672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_process_event_entry(struct dwc3 *dwc, 220772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const union dwc3_event *event) 220872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 220972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* Endpoint IRQ, handle it and return early */ 221072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (event->type.is_devspec == 0) { 221172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* depevt */ 221272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return dwc3_endpoint_interrupt(dwc, &event->depevt); 221372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 221472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 221572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (event->type.type) { 221672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_EVENT_TYPE_DEV: 221772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_interrupt(dwc, &event->devt); 221872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 221972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* REVISIT what to do with Carkit and I2C events ? */ 222072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 222172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "UNKNOWN IRQ type %d\n", event->raw); 222272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 222372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 222472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 222572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic irqreturn_t dwc3_process_event_buf(struct dwc3 *dwc, u32 buf) 222672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 222772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_event_buffer *evt; 222872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int left; 222972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 count; 223072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 223172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi count = dwc3_readl(dwc->regs, DWC3_GEVNTCOUNT(buf)); 223272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi count &= DWC3_GEVNTCOUNT_MASK; 223372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!count) 223472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return IRQ_NONE; 223572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 223672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi evt = dwc->ev_buffs[buf]; 223772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi left = count; 223872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 223972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi while (left > 0) { 224072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi union dwc3_event event; 224172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 2242d70d84423cbc5d6d929640189cf204e693024309Felipe Balbi event.raw = *(u32 *) (evt->buf + evt->lpos); 2243d70d84423cbc5d6d929640189cf204e693024309Felipe Balbi 224472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_process_event_entry(dwc, &event); 224572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 224672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * XXX we wrap around correctly to the next entry as almost all 224772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * entries are 4 bytes in size. There is one entry which has 12 224872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * bytes which is a regular entry followed by 8 bytes data. ATM 224972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * I don't know how things are organized if were get next to the 225072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * a boundary so I worry about that once we try to handle that. 225172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 225272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi evt->lpos = (evt->lpos + 4) % DWC3_EVENT_BUFFERS_SIZE; 225372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi left -= 4; 225472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 225572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_GEVNTCOUNT(buf), 4); 225672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 225772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 225872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return IRQ_HANDLED; 225972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 226072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 226172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic irqreturn_t dwc3_interrupt(int irq, void *_dwc) 226272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 226372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = _dwc; 226472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int i; 226572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi irqreturn_t ret = IRQ_NONE; 226672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 226772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock(&dwc->lock); 226872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 22699f622b2a407d8b34a5a7f5b4abd8b29b25cf4f32Felipe Balbi for (i = 0; i < dwc->num_event_buffers; i++) { 227072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi irqreturn_t status; 227172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 227272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi status = dwc3_process_event_buf(dwc, i); 227372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (status == IRQ_HANDLED) 227472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = status; 227572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 227672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 227772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock(&dwc->lock); 227872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 227972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 228072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 228172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 228272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/** 228372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * dwc3_gadget_init - Initializes gadget related registers 228472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * @dwc: Pointer to out controller context structure 228572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 228672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Returns 0 on success otherwise negative errno. 228772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 228872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiint __devinit dwc3_gadget_init(struct dwc3 *dwc) 228972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 229072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 229172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 229272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int irq; 229372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 229472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ctrl_req = dma_alloc_coherent(dwc->dev, sizeof(*dwc->ctrl_req), 229572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi &dwc->ctrl_req_addr, GFP_KERNEL); 229672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dwc->ctrl_req) { 229772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to allocate ctrl request\n"); 229872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -ENOMEM; 229972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto err0; 230072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 230172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 230272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ep0_trb = dma_alloc_coherent(dwc->dev, sizeof(*dwc->ep0_trb), 230372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi &dwc->ep0_trb_addr, GFP_KERNEL); 230472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dwc->ep0_trb) { 230572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to allocate ep0 trb\n"); 230672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -ENOMEM; 230772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto err1; 230872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 230972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 231072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->setup_buf = dma_alloc_coherent(dwc->dev, 231172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi sizeof(*dwc->setup_buf) * 2, 231272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi &dwc->setup_buf_addr, GFP_KERNEL); 231372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dwc->setup_buf) { 231472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to allocate setup buffer\n"); 231572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -ENOMEM; 231672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto err2; 231772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 231872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 23195812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi dwc->ep0_bounce = dma_alloc_coherent(dwc->dev, 23205812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi 512, &dwc->ep0_bounce_addr, GFP_KERNEL); 23215812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi if (!dwc->ep0_bounce) { 23225812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi dev_err(dwc->dev, "failed to allocate ep0 bounce buffer\n"); 23235812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi ret = -ENOMEM; 23245812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi goto err3; 23255812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi } 23265812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi 232772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_set_name(&dwc->gadget.dev, "gadget"); 232872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 232972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ops = &dwc3_gadget_ops; 2330d327ab5b6d660d6fe22b073b743fde1668e593bbMichal Nazarewicz dwc->gadget.max_speed = USB_SPEED_SUPER; 233172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_UNKNOWN; 233272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.dev.parent = dwc->dev; 2333eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dwc->gadget.sg_supported = true; 233472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 233572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_set_coherent_mask(&dwc->gadget.dev, dwc->dev->coherent_dma_mask); 233672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 233772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.dev.dma_parms = dwc->dev->dma_parms; 233872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.dev.dma_mask = dwc->dev->dma_mask; 233972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.dev.release = dwc3_gadget_release; 234072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.name = "dwc3-gadget"; 234172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 234272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 234372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * REVISIT: Here we should clear all pending IRQs to be 234472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * sure we're starting from a well known location. 234572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 234672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 234772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_gadget_init_endpoints(dwc); 234872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 23495812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi goto err4; 235072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 235172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi irq = platform_get_irq(to_platform_device(dwc->dev), 0); 235272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 235372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = request_irq(irq, dwc3_interrupt, IRQF_SHARED, 235472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi "dwc3", dwc); 235572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 235672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to request irq #%d --> %d\n", 235772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi irq, ret); 23585812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi goto err5; 235972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 236072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 236172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* Enable all but Start and End of Frame IRQs */ 236272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = (DWC3_DEVTEN_VNDRDEVTSTRCVEDEN | 236372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEVTEN_EVNTOVERFLOWEN | 236472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEVTEN_CMDCMPLTEN | 236572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEVTEN_ERRTICERREN | 236672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEVTEN_WKUPEVTEN | 236772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEVTEN_ULSTCNGEN | 236872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEVTEN_CONNECTDONEEN | 236972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEVTEN_USBRSTEN | 237072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEVTEN_DISCONNEVTEN); 237172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEVTEN, reg); 237272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 237372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = device_register(&dwc->gadget.dev); 237472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 237572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to register gadget device\n"); 237672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi put_device(&dwc->gadget.dev); 23775812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi goto err6; 237872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 237972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 238072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = usb_add_gadget_udc(dwc->dev, &dwc->gadget); 238172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 238272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to register udc\n"); 23835812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi goto err7; 238472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 238572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 238672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 238772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 23885812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbierr7: 238972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi device_unregister(&dwc->gadget.dev); 239072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 23915812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbierr6: 239272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEVTEN, 0x00); 239372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi free_irq(irq, dwc); 239472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 23955812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbierr5: 239672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_free_endpoints(dwc); 239772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 23985812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbierr4: 23995812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi dma_free_coherent(dwc->dev, 512, dwc->ep0_bounce, 24005812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi dwc->ep0_bounce_addr); 24015812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi 240272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbierr3: 240372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(*dwc->setup_buf) * 2, 240472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->setup_buf, dwc->setup_buf_addr); 240572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 240672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbierr2: 240772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(*dwc->ep0_trb), 240872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ep0_trb, dwc->ep0_trb_addr); 240972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 241072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbierr1: 241172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(*dwc->ctrl_req), 241272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ctrl_req, dwc->ctrl_req_addr); 241372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 241472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbierr0: 241572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 241672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 241772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 241872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbivoid dwc3_gadget_exit(struct dwc3 *dwc) 241972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 242072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int irq; 242172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 242272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi usb_del_gadget_udc(&dwc->gadget); 242372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi irq = platform_get_irq(to_platform_device(dwc->dev), 0); 242472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 242572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEVTEN, 0x00); 242672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi free_irq(irq, dwc); 242772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 242872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_free_endpoints(dwc); 242972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 24305812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi dma_free_coherent(dwc->dev, 512, dwc->ep0_bounce, 24315812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi dwc->ep0_bounce_addr); 24325812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi 243372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(*dwc->setup_buf) * 2, 243472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->setup_buf, dwc->setup_buf_addr); 243572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 243672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(*dwc->ep0_trb), 243772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ep0_trb, dwc->ep0_trb_addr); 243872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 243972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(*dwc->ctrl_req), 244072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ctrl_req, dwc->ctrl_req_addr); 244172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 244272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi device_unregister(&dwc->gadget.dev); 244372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 2444