gadget.c revision 457e84b6624b4d97e6ffae437887ea51a22d54a0
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; 175457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi int tmp; 176457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 177457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi if (!(dep->number & 1)) 178457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi continue; 179457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 180457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) 181457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi continue; 182457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 183457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi tmp = dep->endpoint.maxpacket; 184457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi tmp += mdwidth; 185457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi tmp += mdwidth; 186457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 187457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi fifo_size = DIV_ROUND_UP(tmp, mdwidth); 188457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi fifo_size |= (last_fifo_depth << 16); 189457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 190457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi dev_vdbg(dwc->dev, "%s: Fifo Addr %04x Size %d\n", 191457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi dep->name, last_fifo_depth, fifo_size & 0xffff); 192457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 193457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi dwc3_writel(dwc->regs, DWC3_GTXFIFOSIZ(fifo_number), 194457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi fifo_size); 195457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 196457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi last_fifo_depth += (fifo_size & 0xffff); 197457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi } 198457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 199457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi return 0; 200457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi} 201457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 20272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbivoid dwc3_map_buffer_to_dma(struct dwc3_request *req) 20372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 20472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = req->dep->dwc; 20572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 20678c58a53c9864447f2a46d4c06dd3c2616823ad2Sebastian Andrzej Siewior if (req->request.length == 0) { 20778c58a53c9864447f2a46d4c06dd3c2616823ad2Sebastian Andrzej Siewior /* req->request.dma = dwc->setup_buf_addr; */ 20878c58a53c9864447f2a46d4c06dd3c2616823ad2Sebastian Andrzej Siewior return; 20978c58a53c9864447f2a46d4c06dd3c2616823ad2Sebastian Andrzej Siewior } 21078c58a53c9864447f2a46d4c06dd3c2616823ad2Sebastian Andrzej Siewior 211eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (req->request.num_sgs) { 212eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi int mapped; 213eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi 214eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi mapped = dma_map_sg(dwc->dev, req->request.sg, 215eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi req->request.num_sgs, 216eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi req->direction ? DMA_TO_DEVICE 217eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi : DMA_FROM_DEVICE); 218eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (mapped < 0) { 219eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dev_err(dwc->dev, "failed to map SGs\n"); 220eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi return; 221eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi } 222eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi 223eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi req->request.num_mapped_sgs = mapped; 224eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi return; 225eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi } 226eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi 22772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (req->request.dma == DMA_ADDR_INVALID) { 22872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.dma = dma_map_single(dwc->dev, req->request.buf, 22972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.length, req->direction 23072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ? DMA_TO_DEVICE : DMA_FROM_DEVICE); 23172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->mapped = true; 23272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 23372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 23472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 23572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbivoid dwc3_unmap_buffer_from_dma(struct dwc3_request *req) 23672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 23772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = req->dep->dwc; 23872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 23978c58a53c9864447f2a46d4c06dd3c2616823ad2Sebastian Andrzej Siewior if (req->request.length == 0) { 24078c58a53c9864447f2a46d4c06dd3c2616823ad2Sebastian Andrzej Siewior req->request.dma = DMA_ADDR_INVALID; 24178c58a53c9864447f2a46d4c06dd3c2616823ad2Sebastian Andrzej Siewior return; 24278c58a53c9864447f2a46d4c06dd3c2616823ad2Sebastian Andrzej Siewior } 24378c58a53c9864447f2a46d4c06dd3c2616823ad2Sebastian Andrzej Siewior 244eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (req->request.num_mapped_sgs) { 245eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi req->request.dma = DMA_ADDR_INVALID; 246eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dma_unmap_sg(dwc->dev, req->request.sg, 247c09d6b51d78f5ad33417dbac9b479bd6709f9f25Sebastian Andrzej Siewior req->request.num_mapped_sgs, 248eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi req->direction ? DMA_TO_DEVICE 249eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi : DMA_FROM_DEVICE); 250eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi 251eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi req->request.num_mapped_sgs = 0; 252eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi return; 253eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi } 254eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi 25572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (req->mapped) { 25672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_unmap_single(dwc->dev, req->request.dma, 25772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.length, req->direction 25872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ? DMA_TO_DEVICE : DMA_FROM_DEVICE); 25972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->mapped = 0; 260f198ead21bcb7b03d7bb2cba7ba0f5ad615a3862Felipe Balbi req->request.dma = DMA_ADDR_INVALID; 26172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 26272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 26372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 26472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbivoid dwc3_gadget_giveback(struct dwc3_ep *dep, struct dwc3_request *req, 26572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int status) 26672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 26772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 26872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 26972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (req->queued) { 270eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (req->request.num_mapped_sgs) 271eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dep->busy_slot += req->request.num_mapped_sgs; 272eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi else 273eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dep->busy_slot++; 274eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi 27572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 27672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Skip LINK TRB. We can't use req->trb and check for 27772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * DWC3_TRBCTL_LINK_TRB because it points the TRB we just 27872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * completed (not the LINK TRB). 27972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 28072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (((dep->busy_slot & DWC3_TRB_MASK) == DWC3_TRB_NUM - 1) && 28172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi usb_endpoint_xfer_isoc(dep->desc)) 28272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->busy_slot++; 28372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 28472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_del(&req->list); 285eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi req->trb = NULL; 28672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 28772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (req->request.status == -EINPROGRESS) 28872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.status = status; 28972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 29072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_unmap_buffer_from_dma(req); 29172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 29272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "request %p from %s completed %d/%d ===> %d\n", 29372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req, dep->name, req->request.actual, 29472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.length, status); 29572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 29672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock(&dwc->lock); 29772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.complete(&req->dep->endpoint, &req->request); 29872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock(&dwc->lock); 29972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 30072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 30172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic const char *dwc3_gadget_ep_cmd_string(u8 cmd) 30272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 30372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (cmd) { 30472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_DEPSTARTCFG: 30572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Start New Configuration"; 30672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_ENDTRANSFER: 30772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "End Transfer"; 30872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_UPDATETRANSFER: 30972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Update Transfer"; 31072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_STARTTRANSFER: 31172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Start Transfer"; 31272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_CLEARSTALL: 31372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Clear Stall"; 31472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_SETSTALL: 31572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Set Stall"; 31672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_GETSEQNUMBER: 31772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Get Data Sequence Number"; 31872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_SETTRANSFRESOURCE: 31972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Set Endpoint Transfer Resource"; 32072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_SETEPCONFIG: 32172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Set Endpoint Configuration"; 32272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 32372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "UNKNOWN command"; 32472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 32572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 32672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 32772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiint dwc3_send_gadget_ep_cmd(struct dwc3 *dwc, unsigned ep, 32872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned cmd, struct dwc3_gadget_ep_cmd_params *params) 32972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 33072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = dwc->eps[ep]; 33161d58242f634642de42d6a4098913b7254a65053Sebastian Andrzej Siewior u32 timeout = 500; 33272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 33372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 33472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s: cmd '%s' params %08x %08x %08x\n", 33572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name, 336dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi dwc3_gadget_ep_cmd_string(cmd), params->param0, 337dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params->param1, params->param2); 33872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 339dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEPCMDPAR0(ep), params->param0); 340dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEPCMDPAR1(ep), params->param1); 341dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEPCMDPAR2(ep), params->param2); 34272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 34372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEPCMD(ep), cmd | DWC3_DEPCMD_CMDACT); 34472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi do { 34572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DEPCMD(ep)); 34672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(reg & DWC3_DEPCMD_CMDACT)) { 347164f6e141ed214bda30fb219d41ec3254bd90886Felipe Balbi dev_vdbg(dwc->dev, "Command Complete --> %d\n", 348164f6e141ed214bda30fb219d41ec3254bd90886Felipe Balbi DWC3_DEPCMD_STATUS(reg)); 34972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 35072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 35172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 35272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 35372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We can't sleep here, because it is also called from 35472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * interrupt context. 35572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 35672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi timeout--; 35772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!timeout) 35872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -ETIMEDOUT; 35972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 36061d58242f634642de42d6a4098913b7254a65053Sebastian Andrzej Siewior udelay(1); 36172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } while (1); 36272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 36372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 36472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic dma_addr_t dwc3_trb_dma_offset(struct dwc3_ep *dep, 36572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_trb_hw *trb) 36672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 367c439ef87c33a1df30f528cb152151465c2529cacPaul Zimmerman u32 offset = (char *) trb - (char *) dep->trb_pool; 36872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 36972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return dep->trb_pool_dma + offset; 37072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 37172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 37272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_alloc_trb_pool(struct dwc3_ep *dep) 37372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 37472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 37572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 37672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->trb_pool) 37772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 37872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 37972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->number == 0 || dep->number == 1) 38072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 38172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 38272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->trb_pool = dma_alloc_coherent(dwc->dev, 38372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi sizeof(struct dwc3_trb) * DWC3_TRB_NUM, 38472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi &dep->trb_pool_dma, GFP_KERNEL); 38572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dep->trb_pool) { 38672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dep->dwc->dev, "failed to allocate trb pool for %s\n", 38772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 38872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -ENOMEM; 38972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 39072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 39172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 39272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 39372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 39472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_free_trb_pool(struct dwc3_ep *dep) 39572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 39672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 39772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 39872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(struct dwc3_trb) * DWC3_TRB_NUM, 39972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->trb_pool, dep->trb_pool_dma); 40072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 40172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->trb_pool = NULL; 40272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->trb_pool_dma = 0; 40372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 40472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 40572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_start_config(struct dwc3 *dwc, struct dwc3_ep *dep) 40672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 40772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 40872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 cmd; 40972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 41072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0x00, sizeof(params)); 41172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 41272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->number != 1) { 41372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd = DWC3_DEPCMD_DEPSTARTCFG; 41472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* XferRscIdx == 0 for ep0 and 2 for the remaining */ 415b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman if (dep->number > 1) { 416b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman if (dwc->start_config_issued) 417b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman return 0; 418b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman dwc->start_config_issued = true; 41972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd |= DWC3_DEPCMD_PARAM(2); 420b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman } 42172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 42272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return dwc3_send_gadget_ep_cmd(dwc, 0, cmd, ¶ms); 42372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 42472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 42572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 42672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 42772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 42872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_set_ep_config(struct dwc3 *dwc, struct dwc3_ep *dep, 429c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi const struct usb_endpoint_descriptor *desc, 430c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi const struct usb_ss_ep_comp_descriptor *comp_desc) 43172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 43272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 43372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 43472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0x00, sizeof(params)); 43572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 436dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param0 = DWC3_DEPCFG_EP_TYPE(usb_endpoint_type(desc)) 437dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi | DWC3_DEPCFG_MAX_PACKET_SIZE(usb_endpoint_maxp(desc)) 438dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi | DWC3_DEPCFG_BURST_SIZE(dep->endpoint.maxburst); 43972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 440dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param1 = DWC3_DEPCFG_XFER_COMPLETE_EN 441dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi | DWC3_DEPCFG_XFER_NOT_READY_EN; 44272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 44318b7ede5f7ee2092aedcb578d3ac30bd5d4fc23cFelipe Balbi if (usb_ss_max_streams(comp_desc) && usb_endpoint_xfer_bulk(desc)) { 444dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param1 |= DWC3_DEPCFG_STREAM_CAPABLE 445dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi | DWC3_DEPCFG_STREAM_EVENT_EN; 446879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dep->stream_capable = true; 447879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi } 448879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi 44972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (usb_endpoint_xfer_isoc(desc)) 450dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param1 |= DWC3_DEPCFG_XFER_IN_PROGRESS_EN; 45172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 45272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 45372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We are doing 1:1 mapping for endpoints, meaning 45472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Physical Endpoints 2 maps to Logical Endpoint 2 and 45572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * so on. We consider the direction bit as part of the physical 45672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * endpoint number. So USB endpoint 0x81 is 0x03. 45772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 458dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param1 |= DWC3_DEPCFG_EP_NUMBER(dep->number); 45972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 46072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 46172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We must use the lower 16 TX FIFOs even though 46272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * HW might have more 46372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 46472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->direction) 465dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param0 |= DWC3_DEPCFG_FIFO_NUMBER(dep->number >> 1); 46672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 46772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (desc->bInterval) { 468dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param1 |= DWC3_DEPCFG_BINTERVAL_M1(desc->bInterval - 1); 46972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->interval = 1 << (desc->bInterval - 1); 47072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 47172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 47272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return dwc3_send_gadget_ep_cmd(dwc, dep->number, 47372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEPCMD_SETEPCONFIG, ¶ms); 47472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 47572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 47672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_set_xfer_resource(struct dwc3 *dwc, struct dwc3_ep *dep) 47772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 47872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 47972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 48072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0x00, sizeof(params)); 48172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 482dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param0 = DWC3_DEPXFERCFG_NUM_XFER_RES(1); 48372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 48472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return dwc3_send_gadget_ep_cmd(dwc, dep->number, 48572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEPCMD_SETTRANSFRESOURCE, ¶ms); 48672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 48772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 48872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/** 48972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * __dwc3_gadget_ep_enable - Initializes a HW endpoint 49072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * @dep: endpoint to be initialized 49172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * @desc: USB Endpoint Descriptor 49272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 49372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Caller should take care of locking 49472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 49572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int __dwc3_gadget_ep_enable(struct dwc3_ep *dep, 496c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi const struct usb_endpoint_descriptor *desc, 497c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi const struct usb_ss_ep_comp_descriptor *comp_desc) 49872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 49972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 50072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 50172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret = -ENOMEM; 50272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 50372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) { 50472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_gadget_start_config(dwc, dep); 50572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 50672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 50772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 50872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 509c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi ret = dwc3_gadget_set_ep_config(dwc, dep, desc, comp_desc); 51072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 51172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 51272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 51372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) { 51472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_trb_hw *trb_st_hw; 51572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_trb_hw *trb_link_hw; 51672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_trb trb_link; 51772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 51872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_gadget_set_xfer_resource(dwc, dep); 51972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 52072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 52172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 52272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->desc = desc; 523c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi dep->comp_desc = comp_desc; 52472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->type = usb_endpoint_type(desc); 52572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags |= DWC3_EP_ENABLED; 52672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 52772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DALEPENA); 52872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg |= DWC3_DALEPENA_EP(dep->number); 52972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DALEPENA, reg); 53072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 53172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!usb_endpoint_xfer_isoc(desc)) 53272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 53372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 53472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(&trb_link, 0, sizeof(trb_link)); 53572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 53672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* Link TRB for ISOC. The HWO but is never reset */ 53772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trb_st_hw = &dep->trb_pool[0]; 53872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 53972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trb_link.bplh = dwc3_trb_dma_offset(dep, trb_st_hw); 54072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trb_link.trbctl = DWC3_TRBCTL_LINK_TRB; 54172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trb_link.hwo = true; 54272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 54372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trb_link_hw = &dep->trb_pool[DWC3_TRB_NUM - 1]; 54472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_trb_to_hw(&trb_link, trb_link_hw); 54572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 54672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 54772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 54872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 54972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 550624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewiorstatic void dwc3_stop_active_transfer(struct dwc3 *dwc, u32 epnum); 551624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewiorstatic void dwc3_remove_requests(struct dwc3 *dwc, struct dwc3_ep *dep) 55272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 55372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req; 55472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 555624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior if (!list_empty(&dep->req_queued)) 556624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior dwc3_stop_active_transfer(dwc, dep->number); 557624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior 55872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi while (!list_empty(&dep->request_list)) { 55972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req = next_request(&dep->request_list); 56072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 561624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior dwc3_gadget_giveback(dep, req, -ESHUTDOWN); 56272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 56372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 56472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 56572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/** 56672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * __dwc3_gadget_ep_disable - Disables a HW endpoint 56772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * @dep: the endpoint to disable 56872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 569624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior * This function also removes requests which are currently processed ny the 570624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior * hardware and those which are not yet scheduled. 571624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior * Caller should take care of locking. 57272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 57372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int __dwc3_gadget_ep_disable(struct dwc3_ep *dep) 57472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 57572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 57672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 57772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 578624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior dwc3_remove_requests(dwc, dep); 57972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 58072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DALEPENA); 58172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DALEPENA_EP(dep->number); 58272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DALEPENA, reg); 58372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 584879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dep->stream_capable = false; 58572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->desc = NULL; 586c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi dep->comp_desc = NULL; 58772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->type = 0; 588879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dep->flags = 0; 58972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 59072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 59172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 59272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 59372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 59472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 59572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep0_enable(struct usb_ep *ep, 59672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct usb_endpoint_descriptor *desc) 59772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 59872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EINVAL; 59972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 60072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 60172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep0_disable(struct usb_ep *ep) 60272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 60372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EINVAL; 60472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 60572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 60672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 60772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 60872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_enable(struct usb_ep *ep, 60972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct usb_endpoint_descriptor *desc) 61072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 61172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 61272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc; 61372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 61472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 61572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 61672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!ep || !desc || desc->bDescriptorType != USB_DT_ENDPOINT) { 61772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi pr_debug("dwc3: invalid parameters\n"); 61872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EINVAL; 61972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 62072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 62172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!desc->wMaxPacketSize) { 62272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi pr_debug("dwc3: missing wMaxPacketSize\n"); 62372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EINVAL; 62472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 62572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 62672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = to_dwc3_ep(ep); 62772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc = dep->dwc; 62872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 62972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (usb_endpoint_type(desc)) { 63072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_ENDPOINT_XFER_CONTROL: 63172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi strncat(dep->name, "-control", sizeof(dep->name)); 63272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 63372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_ENDPOINT_XFER_ISOC: 63472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi strncat(dep->name, "-isoc", sizeof(dep->name)); 63572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 63672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_ENDPOINT_XFER_BULK: 63772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi strncat(dep->name, "-bulk", sizeof(dep->name)); 63872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 63972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_ENDPOINT_XFER_INT: 64072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi strncat(dep->name, "-int", sizeof(dep->name)); 64172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 64272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 64372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "invalid endpoint transfer type\n"); 64472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 64572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 64672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->flags & DWC3_EP_ENABLED) { 64772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_WARN_ONCE(dwc->dev, true, "%s is already enabled\n", 64872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 64972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 65072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 65172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 65272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "Enabling %s\n", dep->name); 65372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 65472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 655c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi ret = __dwc3_gadget_ep_enable(dep, desc, ep->comp_desc); 65672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 65772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 65872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 65972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 66072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 66172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_disable(struct usb_ep *ep) 66272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 66372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 66472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc; 66572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 66672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 66772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 66872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!ep) { 66972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi pr_debug("dwc3: invalid parameters\n"); 67072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EINVAL; 67172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 67272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 67372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = to_dwc3_ep(ep); 67472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc = dep->dwc; 67572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 67672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) { 67772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_WARN_ONCE(dwc->dev, true, "%s is already disabled\n", 67872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 67972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 68072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 68172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 68272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi snprintf(dep->name, sizeof(dep->name), "ep%d%s", 68372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->number >> 1, 68472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi (dep->number & 1) ? "in" : "out"); 68572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 68672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 68772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = __dwc3_gadget_ep_disable(dep); 68872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 68972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 69072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 69172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 69272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 69372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic struct usb_request *dwc3_gadget_ep_alloc_request(struct usb_ep *ep, 69472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi gfp_t gfp_flags) 69572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 69672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req; 69772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = to_dwc3_ep(ep); 69872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 69972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 70072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req = kzalloc(sizeof(*req), gfp_flags); 70172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!req) { 70272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "not enough memory\n"); 70372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return NULL; 70472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 70572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 70672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->epnum = dep->number; 70772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->dep = dep; 70872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.dma = DMA_ADDR_INVALID; 70972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 71072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return &req->request; 71172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 71272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 71372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_ep_free_request(struct usb_ep *ep, 71472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct usb_request *request) 71572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 71672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req = to_dwc3_request(request); 71772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 71872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi kfree(req); 71972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 72072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 721c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi/** 722c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi * dwc3_prepare_one_trb - setup one TRB from one request 723c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi * @dep: endpoint for which this request is prepared 724c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi * @req: dwc3_request pointer 725c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi */ 72668e823e24aea5227eaf20d6435485e733109d113Felipe Balbistatic void dwc3_prepare_one_trb(struct dwc3_ep *dep, 727eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi struct dwc3_request *req, dma_addr_t dma, 728eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi unsigned length, unsigned last, unsigned chain) 729c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi{ 730eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi struct dwc3 *dwc = dep->dwc; 731c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi struct dwc3_trb_hw *trb_hw; 732c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi struct dwc3_trb trb; 733c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 734c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi unsigned int cur_slot; 735c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 736eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dev_vdbg(dwc->dev, "%s: req %p dma %08llx length %d%s%s\n", 737eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dep->name, req, (unsigned long long) dma, 738eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi length, last ? " last" : "", 739eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi chain ? " chain" : ""); 740eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi 741c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi trb_hw = &dep->trb_pool[dep->free_slot & DWC3_TRB_MASK]; 742c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi cur_slot = dep->free_slot; 743c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi dep->free_slot++; 744c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 745c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi /* Skip the LINK-TRB on ISOC */ 746c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi if (((cur_slot & DWC3_TRB_MASK) == DWC3_TRB_NUM - 1) && 747c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi usb_endpoint_xfer_isoc(dep->desc)) 74868e823e24aea5227eaf20d6435485e733109d113Felipe Balbi return; 749c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 750c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi memset(&trb, 0, sizeof(trb)); 751eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (!req->trb) { 752eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dwc3_gadget_move_request_queued(req); 753eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi req->trb = trb_hw; 754eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi req->trb_dma = dwc3_trb_dma_offset(dep, trb_hw); 755eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi } 756c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 757c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi if (usb_endpoint_xfer_isoc(dep->desc)) { 758c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi trb.isp_imi = true; 759c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi trb.csp = true; 760c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi } else { 761eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi trb.chn = chain; 762c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi trb.lst = last; 763c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi } 764c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 765c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi if (usb_endpoint_xfer_bulk(dep->desc) && dep->stream_capable) 766c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi trb.sid_sofn = req->request.stream_id; 767c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 768c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi switch (usb_endpoint_type(dep->desc)) { 769c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi case USB_ENDPOINT_XFER_CONTROL: 770c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi trb.trbctl = DWC3_TRBCTL_CONTROL_SETUP; 771c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi break; 772c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 773c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi case USB_ENDPOINT_XFER_ISOC: 774c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi trb.trbctl = DWC3_TRBCTL_ISOCHRONOUS_FIRST; 775c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 776c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi /* IOC every DWC3_TRB_NUM / 4 so we can refill */ 777c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi if (!(cur_slot % (DWC3_TRB_NUM / 4))) 778c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi trb.ioc = last; 779c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi break; 780c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 781c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi case USB_ENDPOINT_XFER_BULK: 782c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi case USB_ENDPOINT_XFER_INT: 783c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi trb.trbctl = DWC3_TRBCTL_NORMAL; 784c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi break; 785c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi default: 786c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi /* 787c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi * This is only possible with faulty memory because we 788c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi * checked it already :) 789c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi */ 790c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi BUG(); 791c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi } 792c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 793eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi trb.length = length; 794eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi trb.bplh = dma; 795c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi trb.hwo = true; 796c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 797c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi dwc3_trb_to_hw(&trb, trb_hw); 798c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi} 799c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 80072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* 80172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * dwc3_prepare_trbs - setup TRBs from requests 80272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * @dep: endpoint for which requests are being prepared 80372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * @starting: true if the endpoint is idle and no requests are queued. 80472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 80572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * The functions goes through the requests list and setups TRBs for the 80672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * transfers. The functions returns once there are not more TRBs available or 80772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * it run out of requests. 80872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 80968e823e24aea5227eaf20d6435485e733109d113Felipe Balbistatic void dwc3_prepare_trbs(struct dwc3_ep *dep, bool starting) 81072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 81168e823e24aea5227eaf20d6435485e733109d113Felipe Balbi struct dwc3_request *req, *n; 81272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 trbs_left; 813c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi unsigned int last_one = 0; 81472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 81572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi BUILD_BUG_ON_NOT_POWER_OF_2(DWC3_TRB_NUM); 81672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 81772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* the first request must not be queued */ 81872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trbs_left = (dep->busy_slot - dep->free_slot) & DWC3_TRB_MASK; 819c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 82072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 82172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * if busy & slot are equal than it is either full or empty. If we are 82272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * starting to proceed requests then we are empty. Otherwise we ar 82372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * full and don't do anything 82472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 82572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!trbs_left) { 82672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!starting) 82768e823e24aea5227eaf20d6435485e733109d113Felipe Balbi return; 82872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trbs_left = DWC3_TRB_NUM; 82972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 83072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * In case we start from scratch, we queue the ISOC requests 83172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * starting from slot 1. This is done because we use ring 83272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * buffer and have no LST bit to stop us. Instead, we place 83372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * IOC bit TRB_NUM/4. We try to avoid to having an interrupt 83472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * after the first request so we start at slot 1 and have 83572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 7 requests proceed before we hit the first IOC. 83672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Other transfer types don't use the ring buffer and are 83772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * processed from the first TRB until the last one. Since we 83872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * don't wrap around we have to start at the beginning. 83972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 84072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (usb_endpoint_xfer_isoc(dep->desc)) { 84172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->busy_slot = 1; 84272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->free_slot = 1; 84372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 84472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->busy_slot = 0; 84572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->free_slot = 0; 84672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 84772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 84872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 84972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* The last TRB is a link TRB, not used for xfer */ 85072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if ((trbs_left <= 1) && usb_endpoint_xfer_isoc(dep->desc)) 85168e823e24aea5227eaf20d6435485e733109d113Felipe Balbi return; 85272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 85372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_for_each_entry_safe(req, n, &dep->request_list, list) { 854eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi unsigned length; 855eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dma_addr_t dma; 85672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 857eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (req->request.num_mapped_sgs > 0) { 858eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi struct usb_request *request = &req->request; 859eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi struct scatterlist *sg = request->sg; 860eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi struct scatterlist *s; 861eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi int i; 86272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 863eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi for_each_sg(sg, s, request->num_mapped_sgs, i) { 864eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi unsigned chain = true; 86572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 866eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi length = sg_dma_len(s); 867eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dma = sg_dma_address(s); 86872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 869eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (i == (request->num_mapped_sgs - 1) 870eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi || sg_is_last(s)) { 871eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi last_one = true; 872eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi chain = false; 873eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi } 87472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 875eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi trbs_left--; 876eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (!trbs_left) 877eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi last_one = true; 87872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 879eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (last_one) 880eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi chain = false; 88172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 882eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dwc3_prepare_one_trb(dep, req, dma, length, 883eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi last_one, chain); 88472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 885eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (last_one) 886eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi break; 887eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi } 88872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 889eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dma = req->request.dma; 890eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi length = req->request.length; 891eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi trbs_left--; 89272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 893eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (!trbs_left) 894eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi last_one = 1; 895879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi 896eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi /* Is this the last request? */ 897eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (list_is_last(&req->list, &dep->request_list)) 898eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi last_one = 1; 89972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 900eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dwc3_prepare_one_trb(dep, req, dma, length, 901eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi last_one, false); 90272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 903eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (last_one) 904eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi break; 90572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 90672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 90772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 90872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 90972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int __dwc3_gadget_kick_transfer(struct dwc3_ep *dep, u16 cmd_param, 91072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int start_new) 91172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 91272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 91372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req; 91472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 91572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 91672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 cmd; 91772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 91872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (start_new && (dep->flags & DWC3_EP_BUSY)) { 91972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s: endpoint busy\n", dep->name); 92072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EBUSY; 92172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 92272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags &= ~DWC3_EP_PENDING_REQUEST; 92372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 92472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 92572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * If we are getting here after a short-out-packet we don't enqueue any 92672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * new requests as we try to set the IOC bit only on the last request. 92772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 92872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (start_new) { 92972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (list_empty(&dep->req_queued)) 93072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_prepare_trbs(dep, start_new); 93172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 93272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* req points to the first request which will be sent */ 93372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req = next_request(&dep->req_queued); 93472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 93568e823e24aea5227eaf20d6435485e733109d113Felipe Balbi dwc3_prepare_trbs(dep, start_new); 93668e823e24aea5227eaf20d6435485e733109d113Felipe Balbi 93772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 93872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * req points to the first request where HWO changed 93972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * from 0 to 1 94072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 94168e823e24aea5227eaf20d6435485e733109d113Felipe Balbi req = next_request(&dep->req_queued); 94272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 94372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!req) { 94472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags |= DWC3_EP_PENDING_REQUEST; 94572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 94672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 94772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 94872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0, sizeof(params)); 949dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param0 = upper_32_bits(req->trb_dma); 950dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param1 = lower_32_bits(req->trb_dma); 95172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 95272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (start_new) 95372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd = DWC3_DEPCMD_STARTTRANSFER; 95472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi else 95572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd = DWC3_DEPCMD_UPDATETRANSFER; 95672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 95772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd |= DWC3_DEPCMD_PARAM(cmd_param); 95872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, cmd, ¶ms); 95972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret < 0) { 96072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "failed to send STARTTRANSFER command\n"); 96172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 96272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 96372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * FIXME we need to iterate over the list of requests 96472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * here and stop, unmap, free and del each of the linked 96572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * requests instead of we do now. 96672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 96772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_unmap_buffer_from_dma(req); 96872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_del(&req->list); 96972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 97072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 97172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 97272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags |= DWC3_EP_BUSY; 97372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->res_trans_idx = dwc3_gadget_ep_get_transfer_index(dwc, 97472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->number); 97525b8ff68bf1d4954d4a9dcb4862c6b6a53cb09e2Felipe Balbi 97625b8ff68bf1d4954d4a9dcb4862c6b6a53cb09e2Felipe Balbi WARN_ON_ONCE(!dep->res_trans_idx); 97725b8ff68bf1d4954d4a9dcb4862c6b6a53cb09e2Felipe Balbi 97872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 97972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 98072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 98172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int __dwc3_gadget_ep_queue(struct dwc3_ep *dep, struct dwc3_request *req) 98272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 98372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.actual = 0; 98472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.status = -EINPROGRESS; 98572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->direction = dep->direction; 98672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->epnum = dep->number; 98772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 98872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 98972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We only add to our list of requests now and 99072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * start consuming the list once we get XferNotReady 99172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * IRQ. 99272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 99372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * That way, we avoid doing anything that we don't need 99472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * to do now and defer it until the point we receive a 99572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * particular token from the Host side. 99672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 99772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * This will also avoid Host cancelling URBs due to too 99872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * many NACKs. 99972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 100072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_map_buffer_to_dma(req); 100172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_add_tail(&req->list, &dep->request_list); 100272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 100372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 100472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * There is one special case: XferNotReady with 100572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * empty list of requests. We need to kick the 100672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * transfer here in that situation, otherwise 100772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * we will be NAKing forever. 100872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 100972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * If we get XferNotReady before gadget driver 101072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * has a chance to queue a request, we will ACK 101172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * the IRQ but won't be able to receive the data 101272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * until the next request is queued. The following 101372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * code is handling exactly that. 101472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 101572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->flags & DWC3_EP_PENDING_REQUEST) { 101672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 101772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int start_trans; 101872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 101972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi start_trans = 1; 10207b7dd0253cd50fdc413b4ec199f1f3af08b7ba0dFelipe Balbi if (usb_endpoint_xfer_isoc(dep->desc) && 102172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags & DWC3_EP_BUSY) 102272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi start_trans = 0; 102372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 102472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = __dwc3_gadget_kick_transfer(dep, 0, start_trans); 102572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret && ret != -EBUSY) { 102672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 102772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 102872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "%s: failed to kick transfers\n", 102972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 103072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 103172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi }; 103272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 103372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 103472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 103572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 103672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_queue(struct usb_ep *ep, struct usb_request *request, 103772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi gfp_t gfp_flags) 103872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 103972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req = to_dwc3_request(request); 104072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = to_dwc3_ep(ep); 104172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 104272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 104372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 104472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 104572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 104672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 104772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dep->desc) { 104872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "trying to queue request %p to disabled %s\n", 104972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi request, ep->name); 105072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -ESHUTDOWN; 105172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 105272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 105372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "queing request %p to %s length %d\n", 105472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi request, ep->name, request->length); 105572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 105672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 105772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = __dwc3_gadget_ep_queue(dep, req); 105872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 105972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 106072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 106172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 106272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 106372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_dequeue(struct usb_ep *ep, 106472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct usb_request *request) 106572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 106672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req = to_dwc3_request(request); 106772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *r = NULL; 106872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 106972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = to_dwc3_ep(ep); 107072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 107172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 107272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 107372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret = 0; 107472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 107572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 107672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 107772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_for_each_entry(r, &dep->request_list, list) { 107872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (r == req) 107972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 108072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 108172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 108272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (r != req) { 108372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_for_each_entry(r, &dep->req_queued, list) { 108472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (r == req) 108572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 108672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 108772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (r == req) { 108872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* wait until it is processed */ 108972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_stop_active_transfer(dwc, dep->number); 109072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto out0; 109172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 109272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "request %p was not queued to %s\n", 109372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi request, ep->name); 109472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EINVAL; 109572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto out0; 109672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 109772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 109872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* giveback the request */ 109972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_giveback(dep, req, -ECONNRESET); 110072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 110172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiout0: 110272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 110372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 110472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 110572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 110672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 110772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiint __dwc3_gadget_ep_set_halt(struct dwc3_ep *dep, int value) 110872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 110972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 111072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 111172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 111272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 111372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0x00, sizeof(params)); 111472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 111572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (value) { 11160b7836a9eb32f626ffd3fe3045e8c618cb8ed965Felipe Balbi if (dep->number == 0 || dep->number == 1) { 11170b7836a9eb32f626ffd3fe3045e8c618cb8ed965Felipe Balbi /* 11180b7836a9eb32f626ffd3fe3045e8c618cb8ed965Felipe Balbi * Whenever EP0 is stalled, we will restart 11190b7836a9eb32f626ffd3fe3045e8c618cb8ed965Felipe Balbi * the state machine, thus moving back to 11200b7836a9eb32f626ffd3fe3045e8c618cb8ed965Felipe Balbi * Setup Phase 11210b7836a9eb32f626ffd3fe3045e8c618cb8ed965Felipe Balbi */ 11220b7836a9eb32f626ffd3fe3045e8c618cb8ed965Felipe Balbi dwc->ep0state = EP0_SETUP_PHASE; 11230b7836a9eb32f626ffd3fe3045e8c618cb8ed965Felipe Balbi } 112472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 112572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, 112672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEPCMD_SETSTALL, ¶ms); 112772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 112872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to %s STALL on %s\n", 112972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi value ? "set" : "clear", 113072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 113172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi else 113272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags |= DWC3_EP_STALL; 113372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 11345275455a6e6ae6b57303834b0afd267bb9657ffcPaul Zimmerman if (dep->flags & DWC3_EP_WEDGE) 11355275455a6e6ae6b57303834b0afd267bb9657ffcPaul Zimmerman return 0; 11365275455a6e6ae6b57303834b0afd267bb9657ffcPaul Zimmerman 113772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, 113872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEPCMD_CLEARSTALL, ¶ms); 113972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 114072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to %s STALL on %s\n", 114172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi value ? "set" : "clear", 114272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 114372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi else 114472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags &= ~DWC3_EP_STALL; 114572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 11465275455a6e6ae6b57303834b0afd267bb9657ffcPaul Zimmerman 114772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 114872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 114972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 115072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_set_halt(struct usb_ep *ep, int value) 115172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 115272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = to_dwc3_ep(ep); 115372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 115472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 115572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 115672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 115772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 115872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 115972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 116072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 116172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (usb_endpoint_xfer_isoc(dep->desc)) { 116272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "%s is of Isochronous type\n", dep->name); 116372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EINVAL; 116472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto out; 116572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 116672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 116772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = __dwc3_gadget_ep_set_halt(dep, value); 116872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiout: 116972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 117072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 117172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 117272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 117372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 117472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_set_wedge(struct usb_ep *ep) 117572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 117672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = to_dwc3_ep(ep); 117772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 117872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags |= DWC3_EP_WEDGE; 117972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 11805275455a6e6ae6b57303834b0afd267bb9657ffcPaul Zimmerman return dwc3_gadget_ep_set_halt(ep, 1); 118172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 118272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 118372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 118472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 118572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic struct usb_endpoint_descriptor dwc3_gadget_ep0_desc = { 118672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .bLength = USB_DT_ENDPOINT_SIZE, 118772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .bDescriptorType = USB_DT_ENDPOINT, 118872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .bmAttributes = USB_ENDPOINT_XFER_CONTROL, 118972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi}; 119072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 119172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic const struct usb_ep_ops dwc3_gadget_ep0_ops = { 119272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .enable = dwc3_gadget_ep0_enable, 119372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .disable = dwc3_gadget_ep0_disable, 119472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .alloc_request = dwc3_gadget_ep_alloc_request, 119572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .free_request = dwc3_gadget_ep_free_request, 119672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .queue = dwc3_gadget_ep0_queue, 119772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .dequeue = dwc3_gadget_ep_dequeue, 119872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .set_halt = dwc3_gadget_ep_set_halt, 119972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .set_wedge = dwc3_gadget_ep_set_wedge, 120072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi}; 120172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 120272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic const struct usb_ep_ops dwc3_gadget_ep_ops = { 120372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .enable = dwc3_gadget_ep_enable, 120472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .disable = dwc3_gadget_ep_disable, 120572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .alloc_request = dwc3_gadget_ep_alloc_request, 120672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .free_request = dwc3_gadget_ep_free_request, 120772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .queue = dwc3_gadget_ep_queue, 120872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .dequeue = dwc3_gadget_ep_dequeue, 120972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .set_halt = dwc3_gadget_ep_set_halt, 121072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .set_wedge = dwc3_gadget_ep_set_wedge, 121172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi}; 121272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 121372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 121472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 121572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_get_frame(struct usb_gadget *g) 121672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 121772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 121872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 121972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 122072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 122172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return DWC3_DSTS_SOFFN(reg); 122272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 122372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 122472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_wakeup(struct usb_gadget *g) 122572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 122672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 122772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 122872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long timeout; 122972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 123072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 123172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 123272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 123372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret = 0; 123472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 123572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 link_state; 123672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 speed; 123772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 123872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 123972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 124072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 124172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * According to the Databook Remote wakeup request should 124272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * be issued only when the device is in early suspend state. 124372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 124472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We can check that via USB Link State bits in DSTS register. 124572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 124672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 124772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 124872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi speed = reg & DWC3_DSTS_CONNECTSPD; 124972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (speed == DWC3_DSTS_SUPERSPEED) { 125072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "no wakeup on SuperSpeed\n"); 125172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EINVAL; 125272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto out; 125372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 125472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 125572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi link_state = DWC3_DSTS_USBLNKST(reg); 125672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 125772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (link_state) { 125872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_LINK_STATE_RX_DET: /* in HS, means Early Suspend */ 125972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_LINK_STATE_U3: /* in HS, means SUSPEND */ 126072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 126172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 126272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "can't wakeup from link state %d\n", 126372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi link_state); 126472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EINVAL; 126572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto out; 126672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 126772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 12688598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi ret = dwc3_gadget_set_link_state(dwc, DWC3_LINK_STATE_RECOV); 12698598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi if (ret < 0) { 12708598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi dev_err(dwc->dev, "failed to put link in Recovery\n"); 12718598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi goto out; 12728598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi } 127372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 127472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* write zeroes to Link Change Request */ 127572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DCTL_ULSTCHNGREQ_MASK; 127672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 127772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 127872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* pool until Link State change to ON */ 127972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi timeout = jiffies + msecs_to_jiffies(100); 128072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 128172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi while (!(time_after(jiffies, timeout))) { 128272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 128372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 128472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* in HS, means ON */ 128572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (DWC3_DSTS_USBLNKST(reg) == DWC3_LINK_STATE_U0) 128672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 128772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 128872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 128972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (DWC3_DSTS_USBLNKST(reg) != DWC3_LINK_STATE_U0) { 129072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to send remote wakeup\n"); 129172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EINVAL; 129272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 129372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 129472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiout: 129572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 129672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 129772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 129872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 129972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 130072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_set_selfpowered(struct usb_gadget *g, 130172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int is_selfpowered) 130272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 130372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 130472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 130572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->is_selfpowered = !!is_selfpowered; 130672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 130772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 130872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 130972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 131072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_run_stop(struct dwc3 *dwc, int is_on) 131172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 131272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 131361d58242f634642de42d6a4098913b7254a65053Sebastian Andrzej Siewior u32 timeout = 500; 131472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 131572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 131672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (is_on) 131772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg |= DWC3_DCTL_RUN_STOP; 131872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi else 131972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DCTL_RUN_STOP; 132072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 132172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 132272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 132372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi do { 132472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 132572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (is_on) { 132672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(reg & DWC3_DSTS_DEVCTRLHLT)) 132772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 132872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 132972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (reg & DWC3_DSTS_DEVCTRLHLT) 133072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 133172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 133272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi timeout--; 133372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!timeout) 133472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 133561d58242f634642de42d6a4098913b7254a65053Sebastian Andrzej Siewior udelay(1); 133672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } while (1); 133772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 133872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "gadget %s data soft-%s\n", 133972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver 134072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ? dwc->gadget_driver->function : "no-function", 134172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi is_on ? "connect" : "disconnect"); 134272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 134372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 134472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_pullup(struct usb_gadget *g, int is_on) 134572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 134672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 134772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 134872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 134972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi is_on = !!is_on; 135072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 135172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 135272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_run_stop(dwc, is_on); 135372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 135472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 135572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 135672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 135772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 135872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_start(struct usb_gadget *g, 135972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct usb_gadget_driver *driver) 136072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 136172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 136272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 136372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 136472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret = 0; 136572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 136672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 136772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 136872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 136972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dwc->gadget_driver) { 137072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "%s is already bound to %s\n", 137172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.name, 137272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver->driver.name); 137372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EBUSY; 137472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto err0; 137572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 137672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 137772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver = driver; 137872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.dev.driver = &driver->driver; 137972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 138072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCFG); 138172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~(DWC3_DCFG_SPEED_MASK); 13826c167fc9b0c23ead791edb94cf4debb6b8e534b5Felipe Balbi reg |= dwc->maximum_speed; 138372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCFG, reg); 138472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1385b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman dwc->start_config_issued = false; 1386b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman 138772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* Start with SuperSpeed Default */ 138872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(512); 138972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 139072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[0]; 1391c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL); 139272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 139372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to enable %s\n", dep->name); 139472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto err0; 139572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 139672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 139772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[1]; 1398c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL); 139972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 140072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to enable %s\n", dep->name); 140172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto err1; 140272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 140372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 140472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* begin to receive SETUP packets */ 1405c7fcdeb2627c46b7ec3f0bcb2054b10405f9a70eFelipe Balbi dwc->ep0state = EP0_SETUP_PHASE; 140672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_ep0_out_start(dwc); 140772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 140872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 140972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 141072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 141172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 141272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbierr1: 141372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi __dwc3_gadget_ep_disable(dwc->eps[0]); 141472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 141572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbierr0: 141672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 141772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 141872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 141972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 142072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 142172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_stop(struct usb_gadget *g, 142272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct usb_gadget_driver *driver) 142372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 142472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 142572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 142672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 142772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 142872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 142972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi __dwc3_gadget_ep_disable(dwc->eps[0]); 143072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi __dwc3_gadget_ep_disable(dwc->eps[1]); 143172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 143272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver = NULL; 143372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.dev.driver = NULL; 143472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 143572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 143672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 143772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 143872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 143972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic const struct usb_gadget_ops dwc3_gadget_ops = { 144072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .get_frame = dwc3_gadget_get_frame, 144172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .wakeup = dwc3_gadget_wakeup, 144272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .set_selfpowered = dwc3_gadget_set_selfpowered, 144372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .pullup = dwc3_gadget_pullup, 144472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .udc_start = dwc3_gadget_start, 144572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .udc_stop = dwc3_gadget_stop, 144672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi}; 144772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 144872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 144972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 145072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int __devinit dwc3_gadget_init_endpoints(struct dwc3 *dwc) 145172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 145272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 145372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 epnum; 145472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 145572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi INIT_LIST_HEAD(&dwc->gadget.ep_list); 145672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 145772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi for (epnum = 0; epnum < DWC3_ENDPOINTS_NUM; epnum++) { 145872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = kzalloc(sizeof(*dep), GFP_KERNEL); 145972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dep) { 146072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "can't allocate endpoint %d\n", 146172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi epnum); 146272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -ENOMEM; 146372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 146472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 146572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->dwc = dwc; 146672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->number = epnum; 146772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->eps[epnum] = dep; 146872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 146972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi snprintf(dep->name, sizeof(dep->name), "ep%d%s", epnum >> 1, 147072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi (epnum & 1) ? "in" : "out"); 147172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->endpoint.name = dep->name; 147272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->direction = (epnum & 1); 147372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 147472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (epnum == 0 || epnum == 1) { 147572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->endpoint.maxpacket = 512; 147672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->endpoint.ops = &dwc3_gadget_ep0_ops; 147772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!epnum) 147872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ep0 = &dep->endpoint; 147972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 148072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 148172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 148272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->endpoint.maxpacket = 1024; 148312d36c16bde3ee0643d705caa87723de536dbe49Sebastian Andrzej Siewior dep->endpoint.max_streams = 15; 148472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->endpoint.ops = &dwc3_gadget_ep_ops; 148572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_add_tail(&dep->endpoint.ep_list, 148672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi &dwc->gadget.ep_list); 148772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 148872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_alloc_trb_pool(dep); 148925b8ff68bf1d4954d4a9dcb4862c6b6a53cb09e2Felipe Balbi if (ret) 149072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 149172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 149225b8ff68bf1d4954d4a9dcb4862c6b6a53cb09e2Felipe Balbi 149372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi INIT_LIST_HEAD(&dep->request_list); 149472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi INIT_LIST_HEAD(&dep->req_queued); 149572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 149672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 149772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 149872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 149972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 150072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_free_endpoints(struct dwc3 *dwc) 150172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 150272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 150372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 epnum; 150472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 150572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi for (epnum = 0; epnum < DWC3_ENDPOINTS_NUM; epnum++) { 150672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[epnum]; 150772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_free_trb_pool(dep); 150872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 150972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (epnum != 0 && epnum != 1) 151072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_del(&dep->endpoint.ep_list); 151172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 151272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi kfree(dep); 151372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 151472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 151572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 151672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_release(struct device *dev) 151772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 151872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dev, "%s\n", __func__); 151972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 152072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 152172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 152272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_cleanup_done_reqs(struct dwc3 *dwc, struct dwc3_ep *dep, 152372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct dwc3_event_depevt *event, int status) 152472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 152572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req; 152672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_trb trb; 152772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned int count; 152872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned int s_pkt = 0; 152972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 153072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi do { 153172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req = next_request(&dep->req_queued); 1532d39ee7be2aaf0a53d7b5f43c13571bac95f7cc0cSebastian Andrzej Siewior if (!req) { 1533d39ee7be2aaf0a53d7b5f43c13571bac95f7cc0cSebastian Andrzej Siewior WARN_ON_ONCE(1); 1534d39ee7be2aaf0a53d7b5f43c13571bac95f7cc0cSebastian Andrzej Siewior return 1; 1535d39ee7be2aaf0a53d7b5f43c13571bac95f7cc0cSebastian Andrzej Siewior } 153672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 153772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_trb_to_nat(req->trb, &trb); 153872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 15390d2f4758530d1598087d1d2f3e75b4f7d17fc6c7Sebastian Andrzej Siewior if (trb.hwo && status != -ESHUTDOWN) 15400d2f4758530d1598087d1d2f3e75b4f7d17fc6c7Sebastian Andrzej Siewior /* 15410d2f4758530d1598087d1d2f3e75b4f7d17fc6c7Sebastian Andrzej Siewior * We continue despite the error. There is not much we 15420d2f4758530d1598087d1d2f3e75b4f7d17fc6c7Sebastian Andrzej Siewior * can do. If we don't clean in up we loop for ever. If 15430d2f4758530d1598087d1d2f3e75b4f7d17fc6c7Sebastian Andrzej Siewior * we skip the TRB than it gets overwritten reused after 15440d2f4758530d1598087d1d2f3e75b4f7d17fc6c7Sebastian Andrzej Siewior * a while since we use them in a ring buffer. a BUG() 15450d2f4758530d1598087d1d2f3e75b4f7d17fc6c7Sebastian Andrzej Siewior * would help. Lets hope that if this occures, someone 15460d2f4758530d1598087d1d2f3e75b4f7d17fc6c7Sebastian Andrzej Siewior * fixes the root cause instead of looking away :) 15470d2f4758530d1598087d1d2f3e75b4f7d17fc6c7Sebastian Andrzej Siewior */ 154872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "%s's TRB (%p) still owned by HW\n", 154972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name, req->trb); 155072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi count = trb.length; 155172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 155272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->direction) { 155372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (count) { 155472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "incomplete IN transfer %s\n", 155572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 155672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi status = -ECONNRESET; 155772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 155872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 155972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (count && (event->status & DEPEVT_STATUS_SHORT)) 156072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi s_pkt = 1; 156172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 156272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 156372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 156472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We assume here we will always receive the entire data block 156572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * which we should receive. Meaning, if we program RX to 156672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * receive 4K but we receive only 2K, we assume that's all we 156772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * should receive and we simply bounce the request back to the 156872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * gadget driver for further processing. 156972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 157072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.actual += req->request.length - count; 157172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_giveback(dep, req, status); 157272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (s_pkt) 157372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 157472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if ((event->status & DEPEVT_STATUS_LST) && trb.lst) 157572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 157672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if ((event->status & DEPEVT_STATUS_IOC) && trb.ioc) 157772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 157872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } while (1); 157972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 158072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if ((event->status & DEPEVT_STATUS_IOC) && trb.ioc) 158172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 158272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 1; 158372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 158472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 158572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_endpoint_transfer_complete(struct dwc3 *dwc, 158672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep, const struct dwc3_event_depevt *event, 158772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int start_new) 158872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 158972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned status = 0; 159072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int clean_busy; 159172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 159272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (event->status & DEPEVT_STATUS_BUSERR) 159372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi status = -ECONNRESET; 159472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 159572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi clean_busy = dwc3_cleanup_done_reqs(dwc, dep, event, status); 1596a1ae9be5fc137d7e911a77ef408273ff55a53a39Sebastian Andrzej Siewior if (clean_busy) { 159772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags &= ~DWC3_EP_BUSY; 1598a1ae9be5fc137d7e911a77ef408273ff55a53a39Sebastian Andrzej Siewior dep->res_trans_idx = 0; 1599a1ae9be5fc137d7e911a77ef408273ff55a53a39Sebastian Andrzej Siewior } 1600fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1601fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi /* 1602fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * WORKAROUND: This is the 2nd half of U1/U2 -> U0 workaround. 1603fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * See dwc3_gadget_linksts_change_interrupt() for 1st half. 1604fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi */ 1605fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi if (dwc->revision < DWC3_REVISION_183A) { 1606fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi u32 reg; 1607fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi int i; 1608fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1609fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi for (i = 0; i < DWC3_ENDPOINTS_NUM; i++) { 1610fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi struct dwc3_ep *dep = dwc->eps[i]; 1611fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1612fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) 1613fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi continue; 1614fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1615fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi if (!list_empty(&dep->req_queued)) 1616fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi return; 1617fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi } 1618fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1619fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 1620fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi reg |= dwc->u1u2; 1621fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 1622fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1623fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi dwc->u1u2 = 0; 1624fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi } 162572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 162672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 162772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_start_isoc(struct dwc3 *dwc, 162872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep, const struct dwc3_event_depevt *event) 162972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 163072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 uf; 163172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 163272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (list_empty(&dep->request_list)) { 163372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "ISOC ep %s run out for requests.\n", 163472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 163572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 163672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 163772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 163872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (event->parameters) { 163972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 mask; 164072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 164172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi mask = ~(dep->interval - 1); 164272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi uf = event->parameters & mask; 164372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 4 micro frames in the future */ 164472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi uf += dep->interval * 4; 164572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 164672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi uf = 0; 164772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 164872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 164972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi __dwc3_gadget_kick_transfer(dep, uf, 1); 165072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 165172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 165272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_process_ep_cmd_complete(struct dwc3_ep *dep, 165372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct dwc3_event_depevt *event) 165472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 165572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 165672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_event_depevt mod_ev = *event; 165772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 165872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 165972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We were asked to remove one requests. It is possible that this 166072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * request and a few other were started together and have the same 166172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * transfer index. Since we stopped the complete endpoint we don't 166272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * know how many requests were already completed (and not yet) 166372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * reported and how could be done (later). We purge them all until 166472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * the end of the list. 166572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 166672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi mod_ev.status = DEPEVT_STATUS_LST; 166772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_cleanup_done_reqs(dwc, dep, &mod_ev, -ESHUTDOWN); 166872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags &= ~DWC3_EP_BUSY; 166972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* pending requets are ignored and are queued on XferNotReady */ 167072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 167172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 167272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_ep_cmd_compl(struct dwc3_ep *dep, 167372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct dwc3_event_depevt *event) 167472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 167572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 param = event->parameters; 167672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 cmd_type = (param >> 8) & ((1 << 5) - 1); 167772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 167872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (cmd_type) { 167972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_ENDTRANSFER: 168072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_process_ep_cmd_complete(dep, event); 168172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 168272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_STARTTRANSFER: 168372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->res_trans_idx = param & 0x7f; 168472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 168572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 168672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi printk(KERN_ERR "%s() unknown /unexpected type: %d\n", 168772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi __func__, cmd_type); 168872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 168972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi }; 169072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 169172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 169272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_endpoint_interrupt(struct dwc3 *dwc, 169372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct dwc3_event_depevt *event) 169472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 169572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 169672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 epnum = event->endpoint_number; 169772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 169872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[epnum]; 169972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 170072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s: %s\n", dep->name, 170172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_ep_event_string(event->endpoint_event)); 170272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 170372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (epnum == 0 || epnum == 1) { 170472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_ep0_interrupt(dwc, event); 170572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 170672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 170772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 170872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (event->endpoint_event) { 170972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPEVT_XFERCOMPLETE: 171072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (usb_endpoint_xfer_isoc(dep->desc)) { 171172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "%s is an Isochronous endpoint\n", 171272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 171372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 171472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 171572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 171672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_endpoint_transfer_complete(dwc, dep, event, 1); 171772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 171872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPEVT_XFERINPROGRESS: 171972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!usb_endpoint_xfer_isoc(dep->desc)) { 172072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "%s is not an Isochronous endpoint\n", 172172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 172272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 172372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 172472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 172572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_endpoint_transfer_complete(dwc, dep, event, 0); 172672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 172772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPEVT_XFERNOTREADY: 172872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (usb_endpoint_xfer_isoc(dep->desc)) { 172972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_start_isoc(dwc, dep, event); 173072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 173172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 173272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 173372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s: reason %s\n", 173440aa41fba348bc5bd19ff5bcf2b03d67bb01d1ceFelipe Balbi dep->name, event->status & 173540aa41fba348bc5bd19ff5bcf2b03d67bb01d1ceFelipe Balbi DEPEVT_STATUS_TRANSFER_ACTIVE 173672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ? "Transfer Active" 173772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi : "Transfer Not Active"); 173872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 173972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = __dwc3_gadget_kick_transfer(dep, 0, 1); 174072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!ret || ret == -EBUSY) 174172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 174272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 174372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "%s: failed to kick transfers\n", 174472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 174572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 174672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 174772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 1748879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi case DWC3_DEPEVT_STREAMEVT: 1749879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi if (!usb_endpoint_xfer_bulk(dep->desc)) { 1750879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dev_err(dwc->dev, "Stream event for non-Bulk %s\n", 1751879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dep->name); 1752879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi return; 1753879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi } 1754879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi 1755879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi switch (event->status) { 1756879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi case DEPEVT_STREAMEVT_FOUND: 1757879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dev_vdbg(dwc->dev, "Stream %d found and started\n", 1758879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi event->parameters); 1759879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi 1760879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi break; 1761879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi case DEPEVT_STREAMEVT_NOTFOUND: 1762879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi /* FALLTHROUGH */ 1763879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi default: 1764879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dev_dbg(dwc->dev, "Couldn't find suitable stream\n"); 1765879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi } 1766879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi break; 176772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPEVT_RXTXFIFOEVT: 176872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "%s FIFO Overrun\n", dep->name); 176972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 177072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPEVT_EPCMDCMPLT: 177172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_ep_cmd_compl(dep, event); 177272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 177372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 177472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 177572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 177672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_disconnect_gadget(struct dwc3 *dwc) 177772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 177872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dwc->gadget_driver && dwc->gadget_driver->disconnect) { 177972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock(&dwc->lock); 178072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver->disconnect(&dwc->gadget); 178172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock(&dwc->lock); 178272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 178372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 178472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 178572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_stop_active_transfer(struct dwc3 *dwc, u32 epnum) 178672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 178772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 178872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 178972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 cmd; 179072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 179172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 179272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[epnum]; 179372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1794624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior WARN_ON(!dep->res_trans_idx); 179572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->res_trans_idx) { 179672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd = DWC3_DEPCMD_ENDTRANSFER; 179772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd |= DWC3_DEPCMD_HIPRI_FORCERM | DWC3_DEPCMD_CMDIOC; 179872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd |= DWC3_DEPCMD_PARAM(dep->res_trans_idx); 179972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0, sizeof(params)); 180072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, cmd, ¶ms); 180172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi WARN_ON_ONCE(ret); 1802a1ae9be5fc137d7e911a77ef408273ff55a53a39Sebastian Andrzej Siewior dep->res_trans_idx = 0; 180372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 180472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 180572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 180672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_stop_active_transfers(struct dwc3 *dwc) 180772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 180872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 epnum; 180972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 181072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi for (epnum = 2; epnum < DWC3_ENDPOINTS_NUM; epnum++) { 181172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 181272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 181372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[epnum]; 181472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) 181572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi continue; 181672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1817624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior dwc3_remove_requests(dwc, dep); 181872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 181972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 182072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 182172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_clear_stall_all_ep(struct dwc3 *dwc) 182272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 182372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 epnum; 182472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 182572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi for (epnum = 1; epnum < DWC3_ENDPOINTS_NUM; epnum++) { 182672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 182772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 182872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 182972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 183072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[epnum]; 183172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 183272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(dep->flags & DWC3_EP_STALL)) 183372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi continue; 183472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 183572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags &= ~DWC3_EP_STALL; 183672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 183772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0, sizeof(params)); 183872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, 183972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEPCMD_CLEARSTALL, ¶ms); 184072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi WARN_ON_ONCE(ret); 184172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 184272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 184372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 184472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_disconnect_interrupt(struct dwc3 *dwc) 184572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 184672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s\n", __func__); 184772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#if 0 184872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi XXX 184972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi U1/U2 is powersave optimization. Skip it for now. Anyway we need to 185072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi enable it before we can disable it. 185172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 185272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 185372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DCTL_INITU1ENA; 185472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 185572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 185672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DCTL_INITU2ENA; 185772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 185872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#endif 185972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 186072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_stop_active_transfers(dwc); 186172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_disconnect_gadget(dwc); 1862b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman dwc->start_config_issued = false; 186372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 186472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_UNKNOWN; 1865df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi dwc->setup_packet_pending = false; 186672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 186772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 186872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_usb3_phy_power(struct dwc3 *dwc, int on) 186972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 187072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 187172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 187272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(0)); 187372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 187472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (on) 187572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_GUSB3PIPECTL_SUSPHY; 187672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi else 187772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg |= DWC3_GUSB3PIPECTL_SUSPHY; 187872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 187972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg); 188072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 188172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 188272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_usb2_phy_power(struct dwc3 *dwc, int on) 188372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 188472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 188572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 188672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0)); 188772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 188872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (on) 188972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_GUSB2PHYCFG_SUSPHY; 189072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi else 189172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg |= DWC3_GUSB2PHYCFG_SUSPHY; 189272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 189372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg); 189472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 189572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 189672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_reset_interrupt(struct dwc3 *dwc) 189772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 189872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 189972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 190072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s\n", __func__); 190172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1902df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi /* 1903df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * WORKAROUND: DWC3 revisions <1.88a have an issue which 1904df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * would cause a missing Disconnect Event if there's a 1905df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * pending Setup Packet in the FIFO. 1906df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * 1907df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * There's no suggested workaround on the official Bug 1908df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * report, which states that "unless the driver/application 1909df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * is doing any special handling of a disconnect event, 1910df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * there is no functional issue". 1911df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * 1912df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * Unfortunately, it turns out that we _do_ some special 1913df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * handling of a disconnect event, namely complete all 1914df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * pending transfers, notify gadget driver of the 1915df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * disconnection, and so on. 1916df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * 1917df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * Our suggested workaround is to follow the Disconnect 1918df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * Event steps here, instead, based on a setup_packet_pending 1919df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * flag. Such flag gets set whenever we have a XferNotReady 1920df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * event on EP0 and gets cleared on XferComplete for the 1921df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * same endpoint. 1922df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * 1923df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * Refers to: 1924df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * 1925df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * STAR#9000466709: RTL: Device : Disconnect event not 1926df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * generated if setup packet pending in FIFO 1927df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi */ 1928df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi if (dwc->revision < DWC3_REVISION_188A) { 1929df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi if (dwc->setup_packet_pending) 1930df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi dwc3_gadget_disconnect_interrupt(dwc); 1931df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi } 1932df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi 1933961906edb549c95f4cc33e4f3dbfd0fcc364954dFelipe Balbi /* after reset -> Default State */ 1934961906edb549c95f4cc33e4f3dbfd0fcc364954dFelipe Balbi dwc->dev_state = DWC3_DEFAULT_STATE; 1935961906edb549c95f4cc33e4f3dbfd0fcc364954dFelipe Balbi 193672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* Enable PHYs */ 193772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_usb2_phy_power(dwc, true); 193872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_usb3_phy_power(dwc, true); 193972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 194072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dwc->gadget.speed != USB_SPEED_UNKNOWN) 194172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_disconnect_gadget(dwc); 194272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 194372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 194472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DCTL_TSTCTRL_MASK; 194572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 194672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 194772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_stop_active_transfers(dwc); 194872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_clear_stall_all_ep(dwc); 1949b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman dwc->start_config_issued = false; 195072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 195172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* Reset device address to zero */ 195272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCFG); 195372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~(DWC3_DCFG_DEVADDR_MASK); 195472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCFG, reg); 195572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 195672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 195772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_update_ram_clk_sel(struct dwc3 *dwc, u32 speed) 195872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 195972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 196072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 usb30_clock = DWC3_GCTL_CLK_BUS; 196172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 196272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 196372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We change the clock only at SS but I dunno why I would want to do 196472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * this. Maybe it becomes part of the power saving plan. 196572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 196672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 196772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (speed != DWC3_DSTS_SUPERSPEED) 196872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 196972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 197072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 197172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * RAMClkSel is reset to 0 after USB reset, so it must be reprogrammed 197272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * each time on Connect Done. 197372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 197472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!usb30_clock) 197572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 197672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 197772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_GCTL); 197872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg |= DWC3_GCTL_RAMCLKSEL(usb30_clock); 197972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_GCTL, reg); 198072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 198172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 198272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_disable_phy(struct dwc3 *dwc, u8 speed) 198372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 198472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (speed) { 198572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_SPEED_SUPER: 198672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_usb2_phy_power(dwc, false); 198772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 198872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_SPEED_HIGH: 198972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_SPEED_FULL: 199072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_SPEED_LOW: 199172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_usb3_phy_power(dwc, false); 199272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 199372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 199472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 199572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 199672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_conndone_interrupt(struct dwc3 *dwc) 199772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 199872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 199972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 200072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 200172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 200272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 speed; 200372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 200472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s\n", __func__); 200572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 200672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0x00, sizeof(params)); 200772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 200872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 200972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi speed = reg & DWC3_DSTS_CONNECTSPD; 201072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->speed = speed; 201172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 201272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_update_ram_clk_sel(dwc, speed); 201372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 201472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (speed) { 201572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DCFG_SUPERSPEED: 201605870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi /* 201705870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * WORKAROUND: DWC3 revisions <1.90a have an issue which 201805870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * would cause a missing USB3 Reset event. 201905870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * 202005870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * In such situations, we should force a USB3 Reset 202105870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * event by calling our dwc3_gadget_reset_interrupt() 202205870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * routine. 202305870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * 202405870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * Refers to: 202505870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * 202605870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * STAR#9000483510: RTL: SS : USB3 reset event may 202705870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * not be generated always when the link enters poll 202805870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi */ 202905870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi if (dwc->revision < DWC3_REVISION_190A) 203005870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi dwc3_gadget_reset_interrupt(dwc); 203105870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi 203272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(512); 203372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ep0->maxpacket = 512; 203472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_SUPER; 203572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 203672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DCFG_HIGHSPEED: 203772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(64); 203872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ep0->maxpacket = 64; 203972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_HIGH; 204072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 204172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DCFG_FULLSPEED2: 204272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DCFG_FULLSPEED1: 204372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(64); 204472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ep0->maxpacket = 64; 204572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_FULL; 204672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 204772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DCFG_LOWSPEED: 204872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(8); 204972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ep0->maxpacket = 8; 205072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_LOW; 205172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 205272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 205372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 205472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* Disable unneded PHY */ 205572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_disable_phy(dwc, dwc->gadget.speed); 205672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 205772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[0]; 2058c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL); 205972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 206072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to enable %s\n", dep->name); 206172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 206272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 206372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 206472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[1]; 2065c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL); 206672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 206772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to enable %s\n", dep->name); 206872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 206972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 207072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 207172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 207272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Configure PHY via GUSB3PIPECTLn if required. 207372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 207472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Update GTXFIFOSIZn 207572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 207672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * In both cases reset values should be sufficient. 207772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 207872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 207972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 208072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_wakeup_interrupt(struct dwc3 *dwc) 208172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 208272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s\n", __func__); 208372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 208472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 208572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * TODO take core out of low power mode when that's 208672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * implemented. 208772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 208872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 208972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver->resume(&dwc->gadget); 209072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 209172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 209272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_linksts_change_interrupt(struct dwc3 *dwc, 209372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned int evtinfo) 209472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 2095fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi enum dwc3_link_state next = evtinfo & DWC3_LINK_STATE_MASK; 2096fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 2097fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi /* 2098fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * WORKAROUND: DWC3 Revisions <1.83a have an issue which, depending 2099fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * on the link partner, the USB session might do multiple entry/exit 2100fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * of low power states before a transfer takes place. 2101fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * 2102fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * Due to this problem, we might experience lower throughput. The 2103fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * suggested workaround is to disable DCTL[12:9] bits if we're 2104fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * transitioning from U1/U2 to U0 and enable those bits again 2105fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * after a transfer completes and there are no pending transfers 2106fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * on any of the enabled endpoints. 2107fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * 2108fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * This is the first half of that workaround. 2109fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * 2110fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * Refers to: 2111fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * 2112fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * STAR#9000446952: RTL: Device SS : if U1/U2 ->U0 takes >128us 2113fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * core send LGO_Ux entering U0 2114fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi */ 2115fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi if (dwc->revision < DWC3_REVISION_183A) { 2116fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi if (next == DWC3_LINK_STATE_U0) { 2117fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi u32 u1u2; 2118fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi u32 reg; 2119fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 2120fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi switch (dwc->link_state) { 2121fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi case DWC3_LINK_STATE_U1: 2122fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi case DWC3_LINK_STATE_U2: 2123fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 2124fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi u1u2 = reg & (DWC3_DCTL_INITU2ENA 2125fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi | DWC3_DCTL_ACCEPTU2ENA 2126fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi | DWC3_DCTL_INITU1ENA 2127fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi | DWC3_DCTL_ACCEPTU1ENA); 2128fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 2129fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi if (!dwc->u1u2) 2130fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi dwc->u1u2 = reg & u1u2; 2131fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 2132fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi reg &= ~u1u2; 2133fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 2134fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 2135fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi break; 2136fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi default: 2137fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi /* do nothing */ 2138fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi break; 2139fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi } 2140fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi } 2141fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi } 2142fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 2143fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi dwc->link_state = next; 2144019ac83252dc2b356cb0ca81c25a077ec90309e7Felipe Balbi 2145019ac83252dc2b356cb0ca81c25a077ec90309e7Felipe Balbi dev_vdbg(dwc->dev, "%s link %d\n", __func__, dwc->link_state); 214672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 214772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 214872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_interrupt(struct dwc3 *dwc, 214972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct dwc3_event_devt *event) 215072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 215172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (event->type) { 215272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_DISCONNECT: 215372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_disconnect_interrupt(dwc); 215472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 215572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_RESET: 215672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_reset_interrupt(dwc); 215772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 215872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_CONNECT_DONE: 215972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_conndone_interrupt(dwc); 216072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 216172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_WAKEUP: 216272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_wakeup_interrupt(dwc); 216372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 216472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_LINK_STATUS_CHANGE: 216572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_linksts_change_interrupt(dwc, event->event_info); 216672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 216772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_EOPF: 216872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "End of Periodic Frame\n"); 216972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 217072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_SOF: 217172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "Start of Periodic Frame\n"); 217272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 217372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_ERRATIC_ERROR: 217472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "Erratic Error\n"); 217572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 217672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_CMD_CMPL: 217772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "Command Complete\n"); 217872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 217972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_OVERFLOW: 218072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "Overflow\n"); 218172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 218272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 218372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "UNKNOWN IRQ %d\n", event->type); 218472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 218572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 218672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 218772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_process_event_entry(struct dwc3 *dwc, 218872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const union dwc3_event *event) 218972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 219072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* Endpoint IRQ, handle it and return early */ 219172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (event->type.is_devspec == 0) { 219272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* depevt */ 219372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return dwc3_endpoint_interrupt(dwc, &event->depevt); 219472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 219572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 219672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (event->type.type) { 219772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_EVENT_TYPE_DEV: 219872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_interrupt(dwc, &event->devt); 219972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 220072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* REVISIT what to do with Carkit and I2C events ? */ 220172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 220272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "UNKNOWN IRQ type %d\n", event->raw); 220372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 220472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 220572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 220672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic irqreturn_t dwc3_process_event_buf(struct dwc3 *dwc, u32 buf) 220772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 220872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_event_buffer *evt; 220972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int left; 221072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 count; 221172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 221272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi count = dwc3_readl(dwc->regs, DWC3_GEVNTCOUNT(buf)); 221372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi count &= DWC3_GEVNTCOUNT_MASK; 221472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!count) 221572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return IRQ_NONE; 221672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 221772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi evt = dwc->ev_buffs[buf]; 221872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi left = count; 221972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 222072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi while (left > 0) { 222172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi union dwc3_event event; 222272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 222372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memcpy(&event.raw, (evt->buf + evt->lpos), sizeof(event.raw)); 222472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_process_event_entry(dwc, &event); 222572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 222672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * XXX we wrap around correctly to the next entry as almost all 222772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * entries are 4 bytes in size. There is one entry which has 12 222872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * bytes which is a regular entry followed by 8 bytes data. ATM 222972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * I don't know how things are organized if were get next to the 223072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * a boundary so I worry about that once we try to handle that. 223172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 223272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi evt->lpos = (evt->lpos + 4) % DWC3_EVENT_BUFFERS_SIZE; 223372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi left -= 4; 223472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 223572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_GEVNTCOUNT(buf), 4); 223672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 223772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 223872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return IRQ_HANDLED; 223972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 224072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 224172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic irqreturn_t dwc3_interrupt(int irq, void *_dwc) 224272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 224372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = _dwc; 224472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int i; 224572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi irqreturn_t ret = IRQ_NONE; 224672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 224772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock(&dwc->lock); 224872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 22499f622b2a407d8b34a5a7f5b4abd8b29b25cf4f32Felipe Balbi for (i = 0; i < dwc->num_event_buffers; i++) { 225072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi irqreturn_t status; 225172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 225272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi status = dwc3_process_event_buf(dwc, i); 225372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (status == IRQ_HANDLED) 225472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = status; 225572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 225672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 225772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock(&dwc->lock); 225872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 225972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 226072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 226172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 226272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/** 226372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * dwc3_gadget_init - Initializes gadget related registers 226472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * @dwc: Pointer to out controller context structure 226572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 226672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Returns 0 on success otherwise negative errno. 226772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 226872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiint __devinit dwc3_gadget_init(struct dwc3 *dwc) 226972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 227072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 227172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 227272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int irq; 227372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 227472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ctrl_req = dma_alloc_coherent(dwc->dev, sizeof(*dwc->ctrl_req), 227572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi &dwc->ctrl_req_addr, GFP_KERNEL); 227672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dwc->ctrl_req) { 227772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to allocate ctrl request\n"); 227872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -ENOMEM; 227972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto err0; 228072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 228172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 228272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ep0_trb = dma_alloc_coherent(dwc->dev, sizeof(*dwc->ep0_trb), 228372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi &dwc->ep0_trb_addr, GFP_KERNEL); 228472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dwc->ep0_trb) { 228572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to allocate ep0 trb\n"); 228672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -ENOMEM; 228772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto err1; 228872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 228972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 229072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->setup_buf = dma_alloc_coherent(dwc->dev, 229172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi sizeof(*dwc->setup_buf) * 2, 229272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi &dwc->setup_buf_addr, GFP_KERNEL); 229372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dwc->setup_buf) { 229472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to allocate setup buffer\n"); 229572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -ENOMEM; 229672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto err2; 229772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 229872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 22995812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi dwc->ep0_bounce = dma_alloc_coherent(dwc->dev, 23005812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi 512, &dwc->ep0_bounce_addr, GFP_KERNEL); 23015812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi if (!dwc->ep0_bounce) { 23025812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi dev_err(dwc->dev, "failed to allocate ep0 bounce buffer\n"); 23035812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi ret = -ENOMEM; 23045812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi goto err3; 23055812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi } 23065812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi 230772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_set_name(&dwc->gadget.dev, "gadget"); 230872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 230972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ops = &dwc3_gadget_ops; 2310d327ab5b6d660d6fe22b073b743fde1668e593bbMichal Nazarewicz dwc->gadget.max_speed = USB_SPEED_SUPER; 231172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_UNKNOWN; 231272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.dev.parent = dwc->dev; 2313eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dwc->gadget.sg_supported = true; 231472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 231572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_set_coherent_mask(&dwc->gadget.dev, dwc->dev->coherent_dma_mask); 231672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 231772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.dev.dma_parms = dwc->dev->dma_parms; 231872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.dev.dma_mask = dwc->dev->dma_mask; 231972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.dev.release = dwc3_gadget_release; 232072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.name = "dwc3-gadget"; 232172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 232272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 232372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * REVISIT: Here we should clear all pending IRQs to be 232472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * sure we're starting from a well known location. 232572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 232672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 232772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_gadget_init_endpoints(dwc); 232872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 23295812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi goto err4; 233072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 233172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi irq = platform_get_irq(to_platform_device(dwc->dev), 0); 233272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 233372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = request_irq(irq, dwc3_interrupt, IRQF_SHARED, 233472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi "dwc3", dwc); 233572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 233672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to request irq #%d --> %d\n", 233772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi irq, ret); 23385812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi goto err5; 233972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 234072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 234172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* Enable all but Start and End of Frame IRQs */ 234272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = (DWC3_DEVTEN_VNDRDEVTSTRCVEDEN | 234372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEVTEN_EVNTOVERFLOWEN | 234472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEVTEN_CMDCMPLTEN | 234572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEVTEN_ERRTICERREN | 234672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEVTEN_WKUPEVTEN | 234772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEVTEN_ULSTCNGEN | 234872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEVTEN_CONNECTDONEEN | 234972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEVTEN_USBRSTEN | 235072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEVTEN_DISCONNEVTEN); 235172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEVTEN, reg); 235272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 235372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = device_register(&dwc->gadget.dev); 235472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 235572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to register gadget device\n"); 235672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi put_device(&dwc->gadget.dev); 23575812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi goto err6; 235872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 235972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 236072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = usb_add_gadget_udc(dwc->dev, &dwc->gadget); 236172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 236272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to register udc\n"); 23635812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi goto err7; 236472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 236572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 236672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 236772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 23685812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbierr7: 236972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi device_unregister(&dwc->gadget.dev); 237072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 23715812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbierr6: 237272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEVTEN, 0x00); 237372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi free_irq(irq, dwc); 237472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 23755812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbierr5: 237672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_free_endpoints(dwc); 237772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 23785812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbierr4: 23795812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi dma_free_coherent(dwc->dev, 512, dwc->ep0_bounce, 23805812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi dwc->ep0_bounce_addr); 23815812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi 238272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbierr3: 238372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(*dwc->setup_buf) * 2, 238472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->setup_buf, dwc->setup_buf_addr); 238572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 238672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbierr2: 238772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(*dwc->ep0_trb), 238872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ep0_trb, dwc->ep0_trb_addr); 238972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 239072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbierr1: 239172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(*dwc->ctrl_req), 239272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ctrl_req, dwc->ctrl_req_addr); 239372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 239472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbierr0: 239572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 239672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 239772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 239872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbivoid dwc3_gadget_exit(struct dwc3 *dwc) 239972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 240072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int irq; 240172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 240272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi usb_del_gadget_udc(&dwc->gadget); 240372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi irq = platform_get_irq(to_platform_device(dwc->dev), 0); 240472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 240572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEVTEN, 0x00); 240672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi free_irq(irq, dwc); 240772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 240872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_free_endpoints(dwc); 240972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 24105812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi dma_free_coherent(dwc->dev, 512, dwc->ep0_bounce, 24115812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi dwc->ep0_bounce_addr); 24125812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi 241372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(*dwc->setup_buf) * 2, 241472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->setup_buf, dwc->setup_buf_addr); 241572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 241672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(*dwc->ep0_trb), 241772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ep0_trb, dwc->ep0_trb_addr); 241872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 241972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(*dwc->ctrl_req), 242072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ctrl_req, dwc->ctrl_req_addr); 242172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 242272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi device_unregister(&dwc->gadget.dev); 242372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 2424