gadget.c revision ea53b8828c50b7a5138a8931c41b2671682c86b5
172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/** 272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * gadget.c - DesignWare USB3 DRD Controller Gadget Framework Link 372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com 572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Authors: Felipe Balbi <balbi@ti.com>, 772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Sebastian Andrzej Siewior <bigeasy@linutronix.de> 872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Redistribution and use in source and binary forms, with or without 1072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * modification, are permitted provided that the following conditions 1172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * are met: 1272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 1. Redistributions of source code must retain the above copyright 1372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * notice, this list of conditions, and the following disclaimer, 1472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * without modification. 1572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 2. Redistributions in binary form must reproduce the above copyright 1672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * notice, this list of conditions and the following disclaimer in the 1772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * documentation and/or other materials provided with the distribution. 1872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 3. The names of the above-listed copyright holders may not be used 1972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * to endorse or promote products derived from this software without 2072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * specific prior written permission. 2172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 2272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * ALTERNATIVELY, this software may be distributed under the terms of the 2372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * GNU General Public License ("GPL") version 2, as published by the Free 2472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Software Foundation. 2572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 2672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS 2772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 2872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 2972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 3072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 3172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 3272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 3372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 3472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 3572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 3672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 3772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 3872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 3972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/kernel.h> 4072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/delay.h> 4172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/slab.h> 4272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/spinlock.h> 4372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/platform_device.h> 4472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/pm_runtime.h> 4572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/interrupt.h> 4672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/io.h> 4772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/list.h> 4872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/dma-mapping.h> 4972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 5072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/usb/ch9.h> 5172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/usb/gadget.h> 5272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 5372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include "core.h" 5472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include "gadget.h" 5572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include "io.h" 5672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 5704a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi/** 5804a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi * dwc3_gadget_set_test_mode - Enables USB2 Test Modes 5904a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi * @dwc: pointer to our context structure 6004a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi * @mode: the mode to set (J, K SE0 NAK, Force Enable) 6104a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi * 6204a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi * Caller should take care of locking. This function will 6304a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi * return 0 on success or -EINVAL if wrong Test Selector 6404a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi * is passed 6504a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi */ 6604a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbiint dwc3_gadget_set_test_mode(struct dwc3 *dwc, int mode) 6704a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi{ 6804a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi u32 reg; 6904a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi 7004a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 7104a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi reg &= ~DWC3_DCTL_TSTCTRL_MASK; 7204a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi 7304a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi switch (mode) { 7404a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi case TEST_J: 7504a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi case TEST_K: 7604a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi case TEST_SE0_NAK: 7704a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi case TEST_PACKET: 7804a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi case TEST_FORCE_EN: 7904a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi reg |= mode << 1; 8004a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi break; 8104a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi default: 8204a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi return -EINVAL; 8304a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi } 8404a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi 8504a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 8604a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi 8704a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi return 0; 8804a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi} 8904a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi 908598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi/** 918598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi * dwc3_gadget_set_link_state - Sets USB Link to a particular State 928598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi * @dwc: pointer to our context structure 938598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi * @state: the state to put link into 948598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi * 958598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi * Caller should take care of locking. This function will 96aee63e3cb6b0396b99c6387a47cb90a7417f3957Paul Zimmerman * return 0 on success or -ETIMEDOUT. 978598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi */ 988598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbiint dwc3_gadget_set_link_state(struct dwc3 *dwc, enum dwc3_link_state state) 998598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi{ 100aee63e3cb6b0396b99c6387a47cb90a7417f3957Paul Zimmerman int retries = 10000; 1018598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi u32 reg; 1028598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi 103802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman /* 104802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman * Wait until device controller is ready. Only applies to 1.94a and 105802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman * later RTL. 106802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman */ 107802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman if (dwc->revision >= DWC3_REVISION_194A) { 108802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman while (--retries) { 109802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman reg = dwc3_readl(dwc->regs, DWC3_DSTS); 110802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman if (reg & DWC3_DSTS_DCNRD) 111802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman udelay(5); 112802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman else 113802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman break; 114802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman } 115802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman 116802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman if (retries <= 0) 117802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman return -ETIMEDOUT; 118802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman } 119802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman 1208598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 1218598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi reg &= ~DWC3_DCTL_ULSTCHNGREQ_MASK; 1228598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi 1238598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi /* set requested state */ 1248598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi reg |= DWC3_DCTL_ULSTCHNGREQ(state); 1258598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 1268598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi 127802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman /* 128802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman * The following code is racy when called from dwc3_gadget_wakeup, 129802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman * and is not needed, at least on newer versions 130802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman */ 131802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman if (dwc->revision >= DWC3_REVISION_194A) 132802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman return 0; 133802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman 1348598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi /* wait for a change in DSTS */ 135aed430e5139af3e2c251f52db7fc6c5e2ce2b714Paul Zimmerman retries = 10000; 1368598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi while (--retries) { 1378598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 1388598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi 1398598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi if (DWC3_DSTS_USBLNKST(reg) == state) 1408598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi return 0; 1418598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi 142aee63e3cb6b0396b99c6387a47cb90a7417f3957Paul Zimmerman udelay(5); 1438598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi } 1448598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi 1458598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi dev_vdbg(dwc->dev, "link state change request timed out\n"); 1468598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi 1478598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi return -ETIMEDOUT; 1488598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi} 1498598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi 150457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi/** 151457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * dwc3_gadget_resize_tx_fifos - reallocate fifo spaces for current use-case 152457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * @dwc: pointer to our context structure 153457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * 154457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * This function will a best effort FIFO allocation in order 155457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * to improve FIFO usage and throughput, while still allowing 156457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * us to enable as many endpoints as possible. 157457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * 158457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * Keep in mind that this operation will be highly dependent 159457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * on the configured size for RAM1 - which contains TxFifo -, 160457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * the amount of endpoints enabled on coreConsultant tool, and 161457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * the width of the Master Bus. 162457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * 163457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * In the ideal world, we would always be able to satisfy the 164457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * following equation: 165457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * 166457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * ((512 + 2 * MDWIDTH-Bytes) + (Number of IN Endpoints - 1) * \ 167457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * (3 * (1024 + MDWIDTH-Bytes) + MDWIDTH-Bytes)) / MDWIDTH-Bytes 168457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * 169457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * Unfortunately, due to many variables that's not always the case. 170457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi */ 171457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbiint dwc3_gadget_resize_tx_fifos(struct dwc3 *dwc) 172457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi{ 173457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi int last_fifo_depth = 0; 174457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi int ram1_depth; 175457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi int fifo_size; 176457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi int mdwidth; 177457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi int num; 178457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 179457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi if (!dwc->needs_fifo_resize) 180457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi return 0; 181457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 182457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi ram1_depth = DWC3_RAM1_DEPTH(dwc->hwparams.hwparams7); 183457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi mdwidth = DWC3_MDWIDTH(dwc->hwparams.hwparams0); 184457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 185457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi /* MDWIDTH is represented in bits, we need it in bytes */ 186457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi mdwidth >>= 3; 187457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 188457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi /* 189457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * FIXME For now we will only allocate 1 wMaxPacketSize space 190457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * for each enabled endpoint, later patches will come to 191457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * improve this algorithm so that we better use the internal 192457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * FIFO space 193457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi */ 194457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi for (num = 0; num < DWC3_ENDPOINTS_NUM; num++) { 195457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi struct dwc3_ep *dep = dwc->eps[num]; 196457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi int fifo_number = dep->number >> 1; 1972e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi int mult = 1; 198457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi int tmp; 199457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 200457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi if (!(dep->number & 1)) 201457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi continue; 202457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 203457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) 204457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi continue; 205457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 20616e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if (usb_endpoint_xfer_bulk(dep->endpoint.desc) 20716e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz || usb_endpoint_xfer_isoc(dep->endpoint.desc)) 2082e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi mult = 3; 2092e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi 2102e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi /* 2112e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi * REVISIT: the following assumes we will always have enough 2122e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi * space available on the FIFO RAM for all possible use cases. 2132e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi * Make sure that's true somehow and change FIFO allocation 2142e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi * accordingly. 2152e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi * 2162e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi * If we have Bulk or Isochronous endpoints, we want 2172e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi * them to be able to be very, very fast. So we're giving 2182e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi * those endpoints a fifo_size which is enough for 3 full 2192e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi * packets 2202e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi */ 2212e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi tmp = mult * (dep->endpoint.maxpacket + mdwidth); 222457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi tmp += mdwidth; 223457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 224457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi fifo_size = DIV_ROUND_UP(tmp, mdwidth); 2252e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi 226457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi fifo_size |= (last_fifo_depth << 16); 227457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 228457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi dev_vdbg(dwc->dev, "%s: Fifo Addr %04x Size %d\n", 229457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi dep->name, last_fifo_depth, fifo_size & 0xffff); 230457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 231457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi dwc3_writel(dwc->regs, DWC3_GTXFIFOSIZ(fifo_number), 232457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi fifo_size); 233457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 234457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi last_fifo_depth += (fifo_size & 0xffff); 235457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi } 236457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 237457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi return 0; 238457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi} 239457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 24072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbivoid dwc3_gadget_giveback(struct dwc3_ep *dep, struct dwc3_request *req, 24172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int status) 24272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 24372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 24472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 24572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (req->queued) { 246eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (req->request.num_mapped_sgs) 247eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dep->busy_slot += req->request.num_mapped_sgs; 248eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi else 249eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dep->busy_slot++; 250eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi 25172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 25272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Skip LINK TRB. We can't use req->trb and check for 25372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * DWC3_TRBCTL_LINK_TRB because it points the TRB we just 25472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * completed (not the LINK TRB). 25572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 25672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (((dep->busy_slot & DWC3_TRB_MASK) == DWC3_TRB_NUM - 1) && 25716e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz usb_endpoint_xfer_isoc(dep->endpoint.desc)) 25872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->busy_slot++; 25972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 26072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_del(&req->list); 261eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi req->trb = NULL; 26272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 26372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (req->request.status == -EINPROGRESS) 26472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.status = status; 26572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 2660fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi usb_gadget_unmap_request(&dwc->gadget, &req->request, 2670fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi req->direction); 26872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 26972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "request %p from %s completed %d/%d ===> %d\n", 27072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req, dep->name, req->request.actual, 27172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.length, status); 27272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 27372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock(&dwc->lock); 2740fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi req->request.complete(&dep->endpoint, &req->request); 27572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock(&dwc->lock); 27672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 27772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 27872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic const char *dwc3_gadget_ep_cmd_string(u8 cmd) 27972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 28072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (cmd) { 28172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_DEPSTARTCFG: 28272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Start New Configuration"; 28372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_ENDTRANSFER: 28472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "End Transfer"; 28572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_UPDATETRANSFER: 28672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Update Transfer"; 28772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_STARTTRANSFER: 28872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Start Transfer"; 28972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_CLEARSTALL: 29072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Clear Stall"; 29172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_SETSTALL: 29272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Set Stall"; 293802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman case DWC3_DEPCMD_GETEPSTATE: 294802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman return "Get Endpoint State"; 29572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_SETTRANSFRESOURCE: 29672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Set Endpoint Transfer Resource"; 29772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_SETEPCONFIG: 29872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Set Endpoint Configuration"; 29972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 30072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "UNKNOWN command"; 30172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 30272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 30372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 304b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbiint dwc3_send_gadget_generic_command(struct dwc3 *dwc, int cmd, u32 param) 305b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi{ 306b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi u32 timeout = 500; 307b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi u32 reg; 308b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi 309b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi dwc3_writel(dwc->regs, DWC3_DGCMDPAR, param); 310b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi dwc3_writel(dwc->regs, DWC3_DGCMD, cmd | DWC3_DGCMD_CMDACT); 311b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi 312b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi do { 313b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DGCMD); 314b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi if (!(reg & DWC3_DGCMD_CMDACT)) { 315b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi dev_vdbg(dwc->dev, "Command Complete --> %d\n", 316b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi DWC3_DGCMD_STATUS(reg)); 317b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi return 0; 318b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi } 319b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi 320b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi /* 321b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi * We can't sleep here, because it's also called from 322b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi * interrupt context. 323b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi */ 324b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi timeout--; 325b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi if (!timeout) 326b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi return -ETIMEDOUT; 327b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi udelay(1); 328b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi } while (1); 329b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi} 330b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi 33172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiint dwc3_send_gadget_ep_cmd(struct dwc3 *dwc, unsigned ep, 33272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned cmd, struct dwc3_gadget_ep_cmd_params *params) 33372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 33472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = dwc->eps[ep]; 33561d58242f634642de42d6a4098913b7254a65053Sebastian Andrzej Siewior u32 timeout = 500; 33672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 33772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 33872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s: cmd '%s' params %08x %08x %08x\n", 33972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name, 340dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi dwc3_gadget_ep_cmd_string(cmd), params->param0, 341dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params->param1, params->param2); 34272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 343dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEPCMDPAR0(ep), params->param0); 344dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEPCMDPAR1(ep), params->param1); 345dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEPCMDPAR2(ep), params->param2); 34672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 34772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEPCMD(ep), cmd | DWC3_DEPCMD_CMDACT); 34872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi do { 34972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DEPCMD(ep)); 35072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(reg & DWC3_DEPCMD_CMDACT)) { 351164f6e141ed214bda30fb219d41ec3254bd90886Felipe Balbi dev_vdbg(dwc->dev, "Command Complete --> %d\n", 352164f6e141ed214bda30fb219d41ec3254bd90886Felipe Balbi DWC3_DEPCMD_STATUS(reg)); 35372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 35472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 35572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 35672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 35772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We can't sleep here, because it is also called from 35872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * interrupt context. 35972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 36072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi timeout--; 36172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!timeout) 36272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -ETIMEDOUT; 36372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 36461d58242f634642de42d6a4098913b7254a65053Sebastian Andrzej Siewior udelay(1); 36572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } while (1); 36672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 36772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 36872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic dma_addr_t dwc3_trb_dma_offset(struct dwc3_ep *dep, 369f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi struct dwc3_trb *trb) 37072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 371c439ef87c33a1df30f528cb152151465c2529cacPaul Zimmerman u32 offset = (char *) trb - (char *) dep->trb_pool; 37272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 37372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return dep->trb_pool_dma + offset; 37472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 37572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 37672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_alloc_trb_pool(struct dwc3_ep *dep) 37772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 37872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 37972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 38072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->trb_pool) 38172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 38272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 38372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->number == 0 || dep->number == 1) 38472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 38572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 38672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->trb_pool = dma_alloc_coherent(dwc->dev, 38772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi sizeof(struct dwc3_trb) * DWC3_TRB_NUM, 38872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi &dep->trb_pool_dma, GFP_KERNEL); 38972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dep->trb_pool) { 39072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dep->dwc->dev, "failed to allocate trb pool for %s\n", 39172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 39272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -ENOMEM; 39372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 39472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 39572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 39672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 39772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 39872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_free_trb_pool(struct dwc3_ep *dep) 39972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 40072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 40172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 40272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(struct dwc3_trb) * DWC3_TRB_NUM, 40372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->trb_pool, dep->trb_pool_dma); 40472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 40572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->trb_pool = NULL; 40672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->trb_pool_dma = 0; 40772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 40872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 40972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_start_config(struct dwc3 *dwc, struct dwc3_ep *dep) 41072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 41172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 41272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 cmd; 41372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 41472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0x00, sizeof(params)); 41572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 41672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->number != 1) { 41772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd = DWC3_DEPCMD_DEPSTARTCFG; 41872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* XferRscIdx == 0 for ep0 and 2 for the remaining */ 419b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman if (dep->number > 1) { 420b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman if (dwc->start_config_issued) 421b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman return 0; 422b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman dwc->start_config_issued = true; 42372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd |= DWC3_DEPCMD_PARAM(2); 424b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman } 42572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 42672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return dwc3_send_gadget_ep_cmd(dwc, 0, cmd, ¶ms); 42772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 42872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 42972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 43072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 43172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 43272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_set_ep_config(struct dwc3 *dwc, struct dwc3_ep *dep, 433c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi const struct usb_endpoint_descriptor *desc, 434c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi const struct usb_ss_ep_comp_descriptor *comp_desc) 43572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 43672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 43772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 43872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0x00, sizeof(params)); 43972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 440dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param0 = DWC3_DEPCFG_EP_TYPE(usb_endpoint_type(desc)) 441dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi | DWC3_DEPCFG_MAX_PACKET_SIZE(usb_endpoint_maxp(desc)) 442dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi | DWC3_DEPCFG_BURST_SIZE(dep->endpoint.maxburst); 44372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 444dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param1 = DWC3_DEPCFG_XFER_COMPLETE_EN 445dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi | DWC3_DEPCFG_XFER_NOT_READY_EN; 44672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 44718b7ede5f7ee2092aedcb578d3ac30bd5d4fc23cFelipe Balbi if (usb_ss_max_streams(comp_desc) && usb_endpoint_xfer_bulk(desc)) { 448dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param1 |= DWC3_DEPCFG_STREAM_CAPABLE 449dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi | DWC3_DEPCFG_STREAM_EVENT_EN; 450879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dep->stream_capable = true; 451879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi } 452879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi 45372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (usb_endpoint_xfer_isoc(desc)) 454dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param1 |= DWC3_DEPCFG_XFER_IN_PROGRESS_EN; 45572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 45672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 45772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We are doing 1:1 mapping for endpoints, meaning 45872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Physical Endpoints 2 maps to Logical Endpoint 2 and 45972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * so on. We consider the direction bit as part of the physical 46072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * endpoint number. So USB endpoint 0x81 is 0x03. 46172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 462dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param1 |= DWC3_DEPCFG_EP_NUMBER(dep->number); 46372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 46472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 46572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We must use the lower 16 TX FIFOs even though 46672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * HW might have more 46772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 46872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->direction) 469dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param0 |= DWC3_DEPCFG_FIFO_NUMBER(dep->number >> 1); 47072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 47172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (desc->bInterval) { 472dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param1 |= DWC3_DEPCFG_BINTERVAL_M1(desc->bInterval - 1); 47372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->interval = 1 << (desc->bInterval - 1); 47472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 47572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 47672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return dwc3_send_gadget_ep_cmd(dwc, dep->number, 47772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEPCMD_SETEPCONFIG, ¶ms); 47872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 47972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 48072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_set_xfer_resource(struct dwc3 *dwc, struct dwc3_ep *dep) 48172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 48272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 48372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 48472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0x00, sizeof(params)); 48572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 486dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param0 = DWC3_DEPXFERCFG_NUM_XFER_RES(1); 48772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 48872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return dwc3_send_gadget_ep_cmd(dwc, dep->number, 48972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEPCMD_SETTRANSFRESOURCE, ¶ms); 49072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 49172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 49272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/** 49372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * __dwc3_gadget_ep_enable - Initializes a HW endpoint 49472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * @dep: endpoint to be initialized 49572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * @desc: USB Endpoint Descriptor 49672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 49772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Caller should take care of locking 49872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 49972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int __dwc3_gadget_ep_enable(struct dwc3_ep *dep, 500c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi const struct usb_endpoint_descriptor *desc, 501c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi const struct usb_ss_ep_comp_descriptor *comp_desc) 50272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 50372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 50472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 50572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret = -ENOMEM; 50672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 50772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) { 50872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_gadget_start_config(dwc, dep); 50972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 51072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 51172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 51272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 513c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi ret = dwc3_gadget_set_ep_config(dwc, dep, desc, comp_desc); 51472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 51572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 51672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 51772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) { 518f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi struct dwc3_trb *trb_st_hw; 519f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi struct dwc3_trb *trb_link; 52072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 52172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_gadget_set_xfer_resource(dwc, dep); 52272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 52372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 52472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 52516e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz dep->endpoint.desc = desc; 526c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi dep->comp_desc = comp_desc; 52772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->type = usb_endpoint_type(desc); 52872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags |= DWC3_EP_ENABLED; 52972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 53072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DALEPENA); 53172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg |= DWC3_DALEPENA_EP(dep->number); 53272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DALEPENA, reg); 53372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 53472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!usb_endpoint_xfer_isoc(desc)) 53572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 53672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 53772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(&trb_link, 0, sizeof(trb_link)); 53872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 5391d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman /* Link TRB for ISOC. The HWO bit is never reset */ 54072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trb_st_hw = &dep->trb_pool[0]; 54172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 542f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb_link = &dep->trb_pool[DWC3_TRB_NUM - 1]; 54372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 544f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb_link->bpl = lower_32_bits(dwc3_trb_dma_offset(dep, trb_st_hw)); 545f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb_link->bph = upper_32_bits(dwc3_trb_dma_offset(dep, trb_st_hw)); 546f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb_link->ctrl |= DWC3_TRBCTL_LINK_TRB; 547f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb_link->ctrl |= DWC3_TRB_CTRL_HWO; 54872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 54972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 55072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 55172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 55272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 553624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewiorstatic void dwc3_stop_active_transfer(struct dwc3 *dwc, u32 epnum); 554624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewiorstatic void dwc3_remove_requests(struct dwc3 *dwc, struct dwc3_ep *dep) 55572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 55672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req; 55772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 558ea53b8828c50b7a5138a8931c41b2671682c86b5Felipe Balbi if (!list_empty(&dep->req_queued)) { 559624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior dwc3_stop_active_transfer(dwc, dep->number); 560624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior 561ea53b8828c50b7a5138a8931c41b2671682c86b5Felipe Balbi /* 562ea53b8828c50b7a5138a8931c41b2671682c86b5Felipe Balbi * NOTICE: We are violating what the Databook says about the 563ea53b8828c50b7a5138a8931c41b2671682c86b5Felipe Balbi * EndTransfer command. Ideally we would _always_ wait for the 564ea53b8828c50b7a5138a8931c41b2671682c86b5Felipe Balbi * EndTransfer Command Completion IRQ, but that's causing too 565ea53b8828c50b7a5138a8931c41b2671682c86b5Felipe Balbi * much trouble synchronizing between us and gadget driver. 566ea53b8828c50b7a5138a8931c41b2671682c86b5Felipe Balbi * 567ea53b8828c50b7a5138a8931c41b2671682c86b5Felipe Balbi * We have discussed this with the IP Provider and it was 568ea53b8828c50b7a5138a8931c41b2671682c86b5Felipe Balbi * suggested to giveback all requests here, but give HW some 569ea53b8828c50b7a5138a8931c41b2671682c86b5Felipe Balbi * extra time to synchronize with the interconnect. We're using 570ea53b8828c50b7a5138a8931c41b2671682c86b5Felipe Balbi * an arbitraty 100us delay for that. 571ea53b8828c50b7a5138a8931c41b2671682c86b5Felipe Balbi * 572ea53b8828c50b7a5138a8931c41b2671682c86b5Felipe Balbi * Note also that a similar handling was tested by Synopsys 573ea53b8828c50b7a5138a8931c41b2671682c86b5Felipe Balbi * (thanks a lot Paul) and nothing bad has come out of it. 574ea53b8828c50b7a5138a8931c41b2671682c86b5Felipe Balbi * In short, what we're doing is: 575ea53b8828c50b7a5138a8931c41b2671682c86b5Felipe Balbi * 576ea53b8828c50b7a5138a8931c41b2671682c86b5Felipe Balbi * - Issue EndTransfer WITH CMDIOC bit set 577ea53b8828c50b7a5138a8931c41b2671682c86b5Felipe Balbi * - Wait 100us 578ea53b8828c50b7a5138a8931c41b2671682c86b5Felipe Balbi * - giveback all requests to gadget driver 579ea53b8828c50b7a5138a8931c41b2671682c86b5Felipe Balbi */ 580ea53b8828c50b7a5138a8931c41b2671682c86b5Felipe Balbi udelay(100); 581ea53b8828c50b7a5138a8931c41b2671682c86b5Felipe Balbi 582ea53b8828c50b7a5138a8931c41b2671682c86b5Felipe Balbi req = next_request(&dep->req_queued); 583ea53b8828c50b7a5138a8931c41b2671682c86b5Felipe Balbi dwc3_gadget_giveback(dep, req, -ESHUTDOWN); 584ea53b8828c50b7a5138a8931c41b2671682c86b5Felipe Balbi } 585ea53b8828c50b7a5138a8931c41b2671682c86b5Felipe Balbi 58672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi while (!list_empty(&dep->request_list)) { 58772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req = next_request(&dep->request_list); 58872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 589624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior dwc3_gadget_giveback(dep, req, -ESHUTDOWN); 59072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 59172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 59272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 59372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/** 59472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * __dwc3_gadget_ep_disable - Disables a HW endpoint 59572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * @dep: the endpoint to disable 59672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 597624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior * This function also removes requests which are currently processed ny the 598624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior * hardware and those which are not yet scheduled. 599624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior * Caller should take care of locking. 60072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 60172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int __dwc3_gadget_ep_disable(struct dwc3_ep *dep) 60272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 60372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 60472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 60572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 606624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior dwc3_remove_requests(dwc, dep); 60772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 60872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DALEPENA); 60972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DALEPENA_EP(dep->number); 61072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DALEPENA, reg); 61172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 612879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dep->stream_capable = false; 613f9c56cdd3905c96c600456203637bd7ec8ec6383Ido Shayevitz dep->endpoint.desc = NULL; 614c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi dep->comp_desc = NULL; 61572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->type = 0; 616879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dep->flags = 0; 61772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 61872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 61972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 62072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 62172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 62272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 62372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep0_enable(struct usb_ep *ep, 62472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct usb_endpoint_descriptor *desc) 62572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 62672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EINVAL; 62772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 62872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 62972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep0_disable(struct usb_ep *ep) 63072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 63172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EINVAL; 63272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 63372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 63472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 63572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 63672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_enable(struct usb_ep *ep, 63772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct usb_endpoint_descriptor *desc) 63872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 63972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 64072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc; 64172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 64272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 64372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 64472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!ep || !desc || desc->bDescriptorType != USB_DT_ENDPOINT) { 64572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi pr_debug("dwc3: invalid parameters\n"); 64672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EINVAL; 64772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 64872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 64972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!desc->wMaxPacketSize) { 65072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi pr_debug("dwc3: missing wMaxPacketSize\n"); 65172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EINVAL; 65272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 65372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 65472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = to_dwc3_ep(ep); 65572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc = dep->dwc; 65672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 65772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (usb_endpoint_type(desc)) { 65872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_ENDPOINT_XFER_CONTROL: 65927a78d6a283d6782438f72306746afe4bf44c215Anton Tikhomirov strlcat(dep->name, "-control", sizeof(dep->name)); 66072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 66172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_ENDPOINT_XFER_ISOC: 66227a78d6a283d6782438f72306746afe4bf44c215Anton Tikhomirov strlcat(dep->name, "-isoc", sizeof(dep->name)); 66372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 66472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_ENDPOINT_XFER_BULK: 66527a78d6a283d6782438f72306746afe4bf44c215Anton Tikhomirov strlcat(dep->name, "-bulk", sizeof(dep->name)); 66672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 66772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_ENDPOINT_XFER_INT: 66827a78d6a283d6782438f72306746afe4bf44c215Anton Tikhomirov strlcat(dep->name, "-int", sizeof(dep->name)); 66972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 67072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 67172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "invalid endpoint transfer type\n"); 67272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 67372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 67472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->flags & DWC3_EP_ENABLED) { 67572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_WARN_ONCE(dwc->dev, true, "%s is already enabled\n", 67672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 67772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 67872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 67972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 68072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "Enabling %s\n", dep->name); 68172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 68272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 683c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi ret = __dwc3_gadget_ep_enable(dep, desc, ep->comp_desc); 68472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 68572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 68672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 68772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 68872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 68972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_disable(struct usb_ep *ep) 69072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 69172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 69272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc; 69372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 69472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 69572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 69672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!ep) { 69772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi pr_debug("dwc3: invalid parameters\n"); 69872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EINVAL; 69972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 70072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 70172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = to_dwc3_ep(ep); 70272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc = dep->dwc; 70372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 70472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) { 70572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_WARN_ONCE(dwc->dev, true, "%s is already disabled\n", 70672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 70772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 70872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 70972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 71072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi snprintf(dep->name, sizeof(dep->name), "ep%d%s", 71172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->number >> 1, 71272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi (dep->number & 1) ? "in" : "out"); 71372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 71472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 71572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = __dwc3_gadget_ep_disable(dep); 71672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 71772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 71872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 71972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 72072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 72172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic struct usb_request *dwc3_gadget_ep_alloc_request(struct usb_ep *ep, 72272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi gfp_t gfp_flags) 72372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 72472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req; 72572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = to_dwc3_ep(ep); 72672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 72772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 72872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req = kzalloc(sizeof(*req), gfp_flags); 72972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!req) { 73072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "not enough memory\n"); 73172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return NULL; 73272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 73372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 73472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->epnum = dep->number; 73572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->dep = dep; 73672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 73772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return &req->request; 73872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 73972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 74072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_ep_free_request(struct usb_ep *ep, 74172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct usb_request *request) 74272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 74372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req = to_dwc3_request(request); 74472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 74572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi kfree(req); 74672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 74772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 748c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi/** 749c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi * dwc3_prepare_one_trb - setup one TRB from one request 750c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi * @dep: endpoint for which this request is prepared 751c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi * @req: dwc3_request pointer 752c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi */ 75368e823e24aea5227eaf20d6435485e733109d113Felipe Balbistatic void dwc3_prepare_one_trb(struct dwc3_ep *dep, 754eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi struct dwc3_request *req, dma_addr_t dma, 755eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi unsigned length, unsigned last, unsigned chain) 756c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi{ 757eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi struct dwc3 *dwc = dep->dwc; 758f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi struct dwc3_trb *trb; 759c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 760c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi unsigned int cur_slot; 761c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 762eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dev_vdbg(dwc->dev, "%s: req %p dma %08llx length %d%s%s\n", 763eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dep->name, req, (unsigned long long) dma, 764eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi length, last ? " last" : "", 765eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi chain ? " chain" : ""); 766eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi 767f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb = &dep->trb_pool[dep->free_slot & DWC3_TRB_MASK]; 768c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi cur_slot = dep->free_slot; 769c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi dep->free_slot++; 770c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 771c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi /* Skip the LINK-TRB on ISOC */ 772c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi if (((cur_slot & DWC3_TRB_MASK) == DWC3_TRB_NUM - 1) && 77316e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz usb_endpoint_xfer_isoc(dep->endpoint.desc)) 77468e823e24aea5227eaf20d6435485e733109d113Felipe Balbi return; 775c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 776eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (!req->trb) { 777eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dwc3_gadget_move_request_queued(req); 778f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi req->trb = trb; 779f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi req->trb_dma = dwc3_trb_dma_offset(dep, trb); 780eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi } 781c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 782f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->size = DWC3_TRB_SIZE_LENGTH(length); 783f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->bpl = lower_32_bits(dma); 784f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->bph = upper_32_bits(dma); 785c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 78616e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz switch (usb_endpoint_type(dep->endpoint.desc)) { 787c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi case USB_ENDPOINT_XFER_CONTROL: 788f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->ctrl = DWC3_TRBCTL_CONTROL_SETUP; 789c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi break; 790c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 791c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi case USB_ENDPOINT_XFER_ISOC: 792f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->ctrl = DWC3_TRBCTL_ISOCHRONOUS_FIRST; 793c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 794206dd69a62a06197b308fa0decfd0b649fcc2811Pratyush Anand if (!req->request.no_interrupt) 795f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->ctrl |= DWC3_TRB_CTRL_IOC; 796c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi break; 797c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 798c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi case USB_ENDPOINT_XFER_BULK: 799c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi case USB_ENDPOINT_XFER_INT: 800f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->ctrl = DWC3_TRBCTL_NORMAL; 801c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi break; 802c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi default: 803c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi /* 804c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi * This is only possible with faulty memory because we 805c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi * checked it already :) 806c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi */ 807c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi BUG(); 808c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi } 809c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 81016e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if (usb_endpoint_xfer_isoc(dep->endpoint.desc)) { 811f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->ctrl |= DWC3_TRB_CTRL_ISP_IMI; 812f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->ctrl |= DWC3_TRB_CTRL_CSP; 813f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi } else { 814f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi if (chain) 815f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->ctrl |= DWC3_TRB_CTRL_CHN; 816f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi 817f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi if (last) 818f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->ctrl |= DWC3_TRB_CTRL_LST; 819f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi } 820c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 82116e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if (usb_endpoint_xfer_bulk(dep->endpoint.desc) && dep->stream_capable) 822f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->ctrl |= DWC3_TRB_CTRL_SID_SOFN(req->request.stream_id); 823c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 824f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->ctrl |= DWC3_TRB_CTRL_HWO; 825c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi} 826c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 82772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* 82872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * dwc3_prepare_trbs - setup TRBs from requests 82972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * @dep: endpoint for which requests are being prepared 83072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * @starting: true if the endpoint is idle and no requests are queued. 83172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 8321d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * The function goes through the requests list and sets up TRBs for the 8331d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * transfers. The function returns once there are no more TRBs available or 8341d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * it runs out of requests. 83572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 83668e823e24aea5227eaf20d6435485e733109d113Felipe Balbistatic void dwc3_prepare_trbs(struct dwc3_ep *dep, bool starting) 83772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 83868e823e24aea5227eaf20d6435485e733109d113Felipe Balbi struct dwc3_request *req, *n; 83972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 trbs_left; 8408d62cd65d74d0e241b3a152f7347bb66126b705bPaul Zimmerman u32 max; 841c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi unsigned int last_one = 0; 84272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 84372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi BUILD_BUG_ON_NOT_POWER_OF_2(DWC3_TRB_NUM); 84472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 84572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* the first request must not be queued */ 84672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trbs_left = (dep->busy_slot - dep->free_slot) & DWC3_TRB_MASK; 847c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 8488d62cd65d74d0e241b3a152f7347bb66126b705bPaul Zimmerman /* Can't wrap around on a non-isoc EP since there's no link TRB */ 84916e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if (!usb_endpoint_xfer_isoc(dep->endpoint.desc)) { 8508d62cd65d74d0e241b3a152f7347bb66126b705bPaul Zimmerman max = DWC3_TRB_NUM - (dep->free_slot & DWC3_TRB_MASK); 8518d62cd65d74d0e241b3a152f7347bb66126b705bPaul Zimmerman if (trbs_left > max) 8528d62cd65d74d0e241b3a152f7347bb66126b705bPaul Zimmerman trbs_left = max; 8538d62cd65d74d0e241b3a152f7347bb66126b705bPaul Zimmerman } 8548d62cd65d74d0e241b3a152f7347bb66126b705bPaul Zimmerman 85572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 8561d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * If busy & slot are equal than it is either full or empty. If we are 8571d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * starting to process requests then we are empty. Otherwise we are 85872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * full and don't do anything 85972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 86072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!trbs_left) { 86172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!starting) 86268e823e24aea5227eaf20d6435485e733109d113Felipe Balbi return; 86372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trbs_left = DWC3_TRB_NUM; 86472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 86572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * In case we start from scratch, we queue the ISOC requests 86672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * starting from slot 1. This is done because we use ring 86772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * buffer and have no LST bit to stop us. Instead, we place 8681d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * IOC bit every TRB_NUM/4. We try to avoid having an interrupt 86972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * after the first request so we start at slot 1 and have 87072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 7 requests proceed before we hit the first IOC. 87172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Other transfer types don't use the ring buffer and are 87272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * processed from the first TRB until the last one. Since we 87372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * don't wrap around we have to start at the beginning. 87472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 87516e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if (usb_endpoint_xfer_isoc(dep->endpoint.desc)) { 87672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->busy_slot = 1; 87772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->free_slot = 1; 87872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 87972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->busy_slot = 0; 88072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->free_slot = 0; 88172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 88272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 88372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 88472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* The last TRB is a link TRB, not used for xfer */ 88516e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if ((trbs_left <= 1) && usb_endpoint_xfer_isoc(dep->endpoint.desc)) 88668e823e24aea5227eaf20d6435485e733109d113Felipe Balbi return; 88772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 88872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_for_each_entry_safe(req, n, &dep->request_list, list) { 889eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi unsigned length; 890eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dma_addr_t dma; 89172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 892eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (req->request.num_mapped_sgs > 0) { 893eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi struct usb_request *request = &req->request; 894eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi struct scatterlist *sg = request->sg; 895eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi struct scatterlist *s; 896eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi int i; 89772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 898eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi for_each_sg(sg, s, request->num_mapped_sgs, i) { 899eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi unsigned chain = true; 90072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 901eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi length = sg_dma_len(s); 902eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dma = sg_dma_address(s); 90372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 9041d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman if (i == (request->num_mapped_sgs - 1) || 9051d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman sg_is_last(s)) { 906eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi last_one = true; 907eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi chain = false; 908eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi } 90972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 910eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi trbs_left--; 911eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (!trbs_left) 912eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi last_one = true; 91372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 914eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (last_one) 915eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi chain = false; 91672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 917eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dwc3_prepare_one_trb(dep, req, dma, length, 918eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi last_one, chain); 91972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 920eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (last_one) 921eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi break; 922eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi } 92372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 924eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dma = req->request.dma; 925eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi length = req->request.length; 926eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi trbs_left--; 92772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 928eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (!trbs_left) 929eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi last_one = 1; 930879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi 931eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi /* Is this the last request? */ 932eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (list_is_last(&req->list, &dep->request_list)) 933eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi last_one = 1; 93472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 935eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dwc3_prepare_one_trb(dep, req, dma, length, 936eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi last_one, false); 93772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 938eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (last_one) 939eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi break; 94072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 94172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 94272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 94372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 94472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int __dwc3_gadget_kick_transfer(struct dwc3_ep *dep, u16 cmd_param, 94572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int start_new) 94672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 94772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 94872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req; 94972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 95072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 95172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 cmd; 95272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 95372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (start_new && (dep->flags & DWC3_EP_BUSY)) { 95472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s: endpoint busy\n", dep->name); 95572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EBUSY; 95672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 95772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags &= ~DWC3_EP_PENDING_REQUEST; 95872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 95972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 96072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * If we are getting here after a short-out-packet we don't enqueue any 96172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * new requests as we try to set the IOC bit only on the last request. 96272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 96372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (start_new) { 96472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (list_empty(&dep->req_queued)) 96572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_prepare_trbs(dep, start_new); 96672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 96772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* req points to the first request which will be sent */ 96872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req = next_request(&dep->req_queued); 96972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 97068e823e24aea5227eaf20d6435485e733109d113Felipe Balbi dwc3_prepare_trbs(dep, start_new); 97168e823e24aea5227eaf20d6435485e733109d113Felipe Balbi 97272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 9731d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * req points to the first request where HWO changed from 0 to 1 97472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 97568e823e24aea5227eaf20d6435485e733109d113Felipe Balbi req = next_request(&dep->req_queued); 97672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 97772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!req) { 97872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags |= DWC3_EP_PENDING_REQUEST; 97972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 98072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 98172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 98272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0, sizeof(params)); 983dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param0 = upper_32_bits(req->trb_dma); 984dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param1 = lower_32_bits(req->trb_dma); 98572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 98672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (start_new) 98772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd = DWC3_DEPCMD_STARTTRANSFER; 98872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi else 98972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd = DWC3_DEPCMD_UPDATETRANSFER; 99072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 99172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd |= DWC3_DEPCMD_PARAM(cmd_param); 99272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, cmd, ¶ms); 99372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret < 0) { 99472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "failed to send STARTTRANSFER command\n"); 99572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 99672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 99772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * FIXME we need to iterate over the list of requests 99872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * here and stop, unmap, free and del each of the linked 9991d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * requests instead of what we do now. 100072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 10010fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi usb_gadget_unmap_request(&dwc->gadget, &req->request, 10020fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi req->direction); 100372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_del(&req->list); 100472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 100572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 100672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 100772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags |= DWC3_EP_BUSY; 100825b8ff68bf1d4954d4a9dcb4862c6b6a53cb09e2Felipe Balbi 1009f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman if (start_new) { 1010f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman dep->res_trans_idx = dwc3_gadget_ep_get_transfer_index(dwc, 1011f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman dep->number); 1012f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman WARN_ON_ONCE(!dep->res_trans_idx); 1013f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman } 101425b8ff68bf1d4954d4a9dcb4862c6b6a53cb09e2Felipe Balbi 101572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 101672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 101772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1018d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anandstatic void __dwc3_gadget_start_isoc(struct dwc3 *dwc, 1019d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand struct dwc3_ep *dep, u32 cur_uf) 1020d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand{ 1021d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand u32 uf; 1022d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand 1023d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand if (list_empty(&dep->request_list)) { 1024d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand dev_vdbg(dwc->dev, "ISOC ep %s run out for requests.\n", 1025d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand dep->name); 1026d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand return; 1027d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand } 1028d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand 1029d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand /* 4 micro frames in the future */ 1030d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand uf = cur_uf + dep->interval * 4; 1031d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand 1032d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand __dwc3_gadget_kick_transfer(dep, uf, 1); 1033d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand} 1034d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand 1035d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anandstatic void dwc3_gadget_start_isoc(struct dwc3 *dwc, 1036d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand struct dwc3_ep *dep, const struct dwc3_event_depevt *event) 1037d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand{ 1038d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand u32 cur_uf, mask; 1039d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand 1040d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand mask = ~(dep->interval - 1); 1041d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand cur_uf = event->parameters & mask; 1042d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand 1043d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand __dwc3_gadget_start_isoc(dwc, dep, cur_uf); 1044d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand} 1045d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand 104672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int __dwc3_gadget_ep_queue(struct dwc3_ep *dep, struct dwc3_request *req) 104772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 10480fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi struct dwc3 *dwc = dep->dwc; 10490fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi int ret; 10500fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi 105172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.actual = 0; 105272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.status = -EINPROGRESS; 105372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->direction = dep->direction; 105472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->epnum = dep->number; 105572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 105672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 105772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We only add to our list of requests now and 105872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * start consuming the list once we get XferNotReady 105972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * IRQ. 106072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 106172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * That way, we avoid doing anything that we don't need 106272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * to do now and defer it until the point we receive a 106372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * particular token from the Host side. 106472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 106572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * This will also avoid Host cancelling URBs due to too 10661d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * many NAKs. 106772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 10680fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi ret = usb_gadget_map_request(&dwc->gadget, &req->request, 10690fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi dep->direction); 10700fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi if (ret) 10710fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi return ret; 10720fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi 107372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_add_tail(&req->list, &dep->request_list); 107472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1075d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand if (usb_endpoint_xfer_isoc(dep->endpoint.desc)) { 1076d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand if (dep->flags & DWC3_EP_BUSY) { 1077d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand dep->flags |= DWC3_EP_PENDING_REQUEST; 1078d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand } else if (dep->flags & DWC3_EP_MISSED_ISOC) { 1079d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand __dwc3_gadget_start_isoc(dwc, dep, dep->current_uf); 1080d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand dep->flags &= ~DWC3_EP_MISSED_ISOC; 1081d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand } 1082d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand } 1083f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman 108472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 1085f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman * There are two special cases: 108672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 1087f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman * 1. XferNotReady with empty list of requests. We need to kick the 1088f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman * transfer here in that situation, otherwise we will be NAKing 1089f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman * forever. If we get XferNotReady before gadget driver has a 1090f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman * chance to queue a request, we will ACK the IRQ but won't be 1091f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman * able to receive the data until the next request is queued. 1092f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman * The following code is handling exactly that. 109372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 1094f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman * 2. XferInProgress on Isoc EP with an active transfer. We need to 1095f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman * kick the transfer here after queuing a request, otherwise the 1096f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman * core may not see the modified TRB(s). 109772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 109872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->flags & DWC3_EP_PENDING_REQUEST) { 1099f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman int ret; 1100f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman int start_trans = 1; 1101f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman u8 trans_idx = dep->res_trans_idx; 110272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 110316e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if (usb_endpoint_xfer_isoc(dep->endpoint.desc) && 1104f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman (dep->flags & DWC3_EP_BUSY)) { 110572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi start_trans = 0; 1106f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman WARN_ON_ONCE(!trans_idx); 1107f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman } else { 1108f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman trans_idx = 0; 1109f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman } 111072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1111f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman ret = __dwc3_gadget_kick_transfer(dep, trans_idx, start_trans); 111272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret && ret != -EBUSY) { 111372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 111472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 111572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "%s: failed to kick transfers\n", 111672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 111772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 1118a092532483e3200a53c8b1170b3988cc668c07efFelipe Balbi } 111972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 112072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 112172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 112272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 112372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_queue(struct usb_ep *ep, struct usb_request *request, 112472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi gfp_t gfp_flags) 112572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 112672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req = to_dwc3_request(request); 112772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = to_dwc3_ep(ep); 112872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 112972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 113072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 113172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 113272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 113372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 113416e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if (!dep->endpoint.desc) { 113572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "trying to queue request %p to disabled %s\n", 113672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi request, ep->name); 113772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -ESHUTDOWN; 113872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 113972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 114072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "queing request %p to %s length %d\n", 114172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi request, ep->name, request->length); 114272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 114372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 114472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = __dwc3_gadget_ep_queue(dep, req); 114572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 114672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 114772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 114872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 114972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 115072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_dequeue(struct usb_ep *ep, 115172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct usb_request *request) 115272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 115372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req = to_dwc3_request(request); 115472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *r = NULL; 115572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 115672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = to_dwc3_ep(ep); 115772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 115872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 115972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 116072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret = 0; 116172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 116272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 116372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 116472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_for_each_entry(r, &dep->request_list, list) { 116572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (r == req) 116672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 116772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 116872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 116972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (r != req) { 117072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_for_each_entry(r, &dep->req_queued, list) { 117172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (r == req) 117272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 117372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 117472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (r == req) { 117572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* wait until it is processed */ 117672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_stop_active_transfer(dwc, dep->number); 117772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto out0; 117872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 117972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "request %p was not queued to %s\n", 118072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi request, ep->name); 118172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EINVAL; 118272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto out0; 118372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 118472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 118572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* giveback the request */ 118672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_giveback(dep, req, -ECONNRESET); 118772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 118872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiout0: 118972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 119072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 119172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 119272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 119372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 119472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiint __dwc3_gadget_ep_set_halt(struct dwc3_ep *dep, int value) 119572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 119672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 119772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 119872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 119972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 120072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0x00, sizeof(params)); 120172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 120272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (value) { 12030b7836a9eb32f626ffd3fe3045e8c618cb8ed965Felipe Balbi if (dep->number == 0 || dep->number == 1) { 12040b7836a9eb32f626ffd3fe3045e8c618cb8ed965Felipe Balbi /* 12050b7836a9eb32f626ffd3fe3045e8c618cb8ed965Felipe Balbi * Whenever EP0 is stalled, we will restart 12060b7836a9eb32f626ffd3fe3045e8c618cb8ed965Felipe Balbi * the state machine, thus moving back to 12070b7836a9eb32f626ffd3fe3045e8c618cb8ed965Felipe Balbi * Setup Phase 12080b7836a9eb32f626ffd3fe3045e8c618cb8ed965Felipe Balbi */ 12090b7836a9eb32f626ffd3fe3045e8c618cb8ed965Felipe Balbi dwc->ep0state = EP0_SETUP_PHASE; 12100b7836a9eb32f626ffd3fe3045e8c618cb8ed965Felipe Balbi } 121172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 121272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, 121372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEPCMD_SETSTALL, ¶ms); 121472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 121572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to %s STALL on %s\n", 121672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi value ? "set" : "clear", 121772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 121872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi else 121972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags |= DWC3_EP_STALL; 122072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 12215275455a6e6ae6b57303834b0afd267bb9657ffcPaul Zimmerman if (dep->flags & DWC3_EP_WEDGE) 12225275455a6e6ae6b57303834b0afd267bb9657ffcPaul Zimmerman return 0; 12235275455a6e6ae6b57303834b0afd267bb9657ffcPaul Zimmerman 122472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, 122572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEPCMD_CLEARSTALL, ¶ms); 122672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 122772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to %s STALL on %s\n", 122872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi value ? "set" : "clear", 122972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 123072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi else 123172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags &= ~DWC3_EP_STALL; 123272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 12335275455a6e6ae6b57303834b0afd267bb9657ffcPaul Zimmerman 123472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 123572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 123672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 123772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_set_halt(struct usb_ep *ep, int value) 123872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 123972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = to_dwc3_ep(ep); 124072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 124172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 124272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 124372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 124472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 124572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 124672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 124772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 124816e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if (usb_endpoint_xfer_isoc(dep->endpoint.desc)) { 124972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "%s is of Isochronous type\n", dep->name); 125072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EINVAL; 125172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto out; 125272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 125372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 125472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = __dwc3_gadget_ep_set_halt(dep, value); 125572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiout: 125672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 125772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 125872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 125972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 126072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 126172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_set_wedge(struct usb_ep *ep) 126272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 126372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = to_dwc3_ep(ep); 1264249a456930cd2df29d085fb738b0e8f4bc1680cfPaul Zimmerman struct dwc3 *dwc = dep->dwc; 1265249a456930cd2df29d085fb738b0e8f4bc1680cfPaul Zimmerman unsigned long flags; 126672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1267249a456930cd2df29d085fb738b0e8f4bc1680cfPaul Zimmerman spin_lock_irqsave(&dwc->lock, flags); 126872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags |= DWC3_EP_WEDGE; 1269249a456930cd2df29d085fb738b0e8f4bc1680cfPaul Zimmerman spin_unlock_irqrestore(&dwc->lock, flags); 127072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 12715275455a6e6ae6b57303834b0afd267bb9657ffcPaul Zimmerman return dwc3_gadget_ep_set_halt(ep, 1); 127272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 127372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 127472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 127572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 127672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic struct usb_endpoint_descriptor dwc3_gadget_ep0_desc = { 127772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .bLength = USB_DT_ENDPOINT_SIZE, 127872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .bDescriptorType = USB_DT_ENDPOINT, 127972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .bmAttributes = USB_ENDPOINT_XFER_CONTROL, 128072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi}; 128172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 128272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic const struct usb_ep_ops dwc3_gadget_ep0_ops = { 128372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .enable = dwc3_gadget_ep0_enable, 128472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .disable = dwc3_gadget_ep0_disable, 128572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .alloc_request = dwc3_gadget_ep_alloc_request, 128672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .free_request = dwc3_gadget_ep_free_request, 128772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .queue = dwc3_gadget_ep0_queue, 128872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .dequeue = dwc3_gadget_ep_dequeue, 128972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .set_halt = dwc3_gadget_ep_set_halt, 129072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .set_wedge = dwc3_gadget_ep_set_wedge, 129172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi}; 129272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 129372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic const struct usb_ep_ops dwc3_gadget_ep_ops = { 129472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .enable = dwc3_gadget_ep_enable, 129572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .disable = dwc3_gadget_ep_disable, 129672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .alloc_request = dwc3_gadget_ep_alloc_request, 129772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .free_request = dwc3_gadget_ep_free_request, 129872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .queue = dwc3_gadget_ep_queue, 129972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .dequeue = dwc3_gadget_ep_dequeue, 130072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .set_halt = dwc3_gadget_ep_set_halt, 130172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .set_wedge = dwc3_gadget_ep_set_wedge, 130272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi}; 130372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 130472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 130572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 130672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_get_frame(struct usb_gadget *g) 130772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 130872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 130972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 131072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 131172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 131272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return DWC3_DSTS_SOFFN(reg); 131372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 131472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 131572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_wakeup(struct usb_gadget *g) 131672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 131772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 131872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 131972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long timeout; 132072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 132172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 132272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 132372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 132472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret = 0; 132572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 132672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 link_state; 132772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 speed; 132872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 132972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 133072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 133172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 133272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * According to the Databook Remote wakeup request should 133372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * be issued only when the device is in early suspend state. 133472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 133572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We can check that via USB Link State bits in DSTS register. 133672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 133772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 133872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 133972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi speed = reg & DWC3_DSTS_CONNECTSPD; 134072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (speed == DWC3_DSTS_SUPERSPEED) { 134172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "no wakeup on SuperSpeed\n"); 134272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EINVAL; 134372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto out; 134472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 134572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 134672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi link_state = DWC3_DSTS_USBLNKST(reg); 134772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 134872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (link_state) { 134972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_LINK_STATE_RX_DET: /* in HS, means Early Suspend */ 135072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_LINK_STATE_U3: /* in HS, means SUSPEND */ 135172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 135272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 135372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "can't wakeup from link state %d\n", 135472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi link_state); 135572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EINVAL; 135672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto out; 135772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 135872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 13598598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi ret = dwc3_gadget_set_link_state(dwc, DWC3_LINK_STATE_RECOV); 13608598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi if (ret < 0) { 13618598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi dev_err(dwc->dev, "failed to put link in Recovery\n"); 13628598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi goto out; 13638598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi } 136472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1365802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman /* Recent versions do this automatically */ 1366802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman if (dwc->revision < DWC3_REVISION_194A) { 1367802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman /* write zeroes to Link Change Request */ 1368fcc023c726b5879d8f3f0f0f48c45d09055272c4Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 1369802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman reg &= ~DWC3_DCTL_ULSTCHNGREQ_MASK; 1370802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman dwc3_writel(dwc->regs, DWC3_DCTL, reg); 1371802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman } 137272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 13731d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman /* poll until Link State changes to ON */ 137472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi timeout = jiffies + msecs_to_jiffies(100); 137572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 13761d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman while (!time_after(jiffies, timeout)) { 137772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 137872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 137972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* in HS, means ON */ 138072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (DWC3_DSTS_USBLNKST(reg) == DWC3_LINK_STATE_U0) 138172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 138272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 138372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 138472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (DWC3_DSTS_USBLNKST(reg) != DWC3_LINK_STATE_U0) { 138572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to send remote wakeup\n"); 138672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EINVAL; 138772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 138872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 138972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiout: 139072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 139172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 139272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 139372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 139472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 139572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_set_selfpowered(struct usb_gadget *g, 139672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int is_selfpowered) 139772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 139872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 1399249a456930cd2df29d085fb738b0e8f4bc1680cfPaul Zimmerman unsigned long flags; 140072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1401249a456930cd2df29d085fb738b0e8f4bc1680cfPaul Zimmerman spin_lock_irqsave(&dwc->lock, flags); 140272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->is_selfpowered = !!is_selfpowered; 1403249a456930cd2df29d085fb738b0e8f4bc1680cfPaul Zimmerman spin_unlock_irqrestore(&dwc->lock, flags); 140472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 140572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 140672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 140772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 140872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_run_stop(struct dwc3 *dwc, int is_on) 140972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 141072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 141161d58242f634642de42d6a4098913b7254a65053Sebastian Andrzej Siewior u32 timeout = 500; 141272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 141372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 14148db7ed15f2557e26371e4b2d98fee290d992b715Felipe Balbi if (is_on) { 1415802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman if (dwc->revision <= DWC3_REVISION_187A) { 1416802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman reg &= ~DWC3_DCTL_TRGTULST_MASK; 1417802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman reg |= DWC3_DCTL_TRGTULST_RX_DET; 1418802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman } 1419802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman 1420802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman if (dwc->revision >= DWC3_REVISION_194A) 1421802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman reg &= ~DWC3_DCTL_KEEP_CONNECT; 1422802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman reg |= DWC3_DCTL_RUN_STOP; 14238db7ed15f2557e26371e4b2d98fee290d992b715Felipe Balbi } else { 142472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DCTL_RUN_STOP; 14258db7ed15f2557e26371e4b2d98fee290d992b715Felipe Balbi } 142672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 142772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 142872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 142972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi do { 143072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 143172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (is_on) { 143272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(reg & DWC3_DSTS_DEVCTRLHLT)) 143372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 143472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 143572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (reg & DWC3_DSTS_DEVCTRLHLT) 143672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 143772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 143872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi timeout--; 143972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!timeout) 144072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 144161d58242f634642de42d6a4098913b7254a65053Sebastian Andrzej Siewior udelay(1); 144272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } while (1); 144372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 144472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "gadget %s data soft-%s\n", 144572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver 144672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ? dwc->gadget_driver->function : "no-function", 144772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi is_on ? "connect" : "disconnect"); 144872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 144972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 145072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_pullup(struct usb_gadget *g, int is_on) 145172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 145272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 145372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 145472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 145572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi is_on = !!is_on; 145672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 145772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 145872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_run_stop(dwc, is_on); 145972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 146072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 146172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 146272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 146372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 146472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_start(struct usb_gadget *g, 146572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct usb_gadget_driver *driver) 146672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 146772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 146872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 146972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 147072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret = 0; 147172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 147272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 147372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 147472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 147572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dwc->gadget_driver) { 147672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "%s is already bound to %s\n", 147772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.name, 147872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver->driver.name); 147972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EBUSY; 148072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto err0; 148172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 148272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 148372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver = driver; 148472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.dev.driver = &driver->driver; 148572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 148672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCFG); 148772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~(DWC3_DCFG_SPEED_MASK); 148807e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi 148907e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi /** 149007e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * WORKAROUND: DWC3 revision < 2.20a have an issue 149107e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * which would cause metastability state on Run/Stop 149207e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * bit if we try to force the IP to USB2-only mode. 149307e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * 149407e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * Because of that, we cannot configure the IP to any 149507e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * speed other than the SuperSpeed 149607e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * 149707e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * Refers to: 149807e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * 149907e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * STAR#9000525659: Clock Domain Crossing on DCTL in 150007e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * USB 2.0 Mode 150107e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi */ 150207e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi if (dwc->revision < DWC3_REVISION_220A) 150307e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi reg |= DWC3_DCFG_SUPERSPEED; 150407e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi else 150507e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi reg |= dwc->maximum_speed; 150672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCFG, reg); 150772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1508b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman dwc->start_config_issued = false; 1509b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman 151072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* Start with SuperSpeed Default */ 151172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(512); 151272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 151372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[0]; 1514c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL); 151572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 151672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to enable %s\n", dep->name); 151772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto err0; 151872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 151972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 152072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[1]; 1521c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL); 152272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 152372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to enable %s\n", dep->name); 152472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto err1; 152572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 152672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 152772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* begin to receive SETUP packets */ 1528c7fcdeb2627c46b7ec3f0bcb2054b10405f9a70eFelipe Balbi dwc->ep0state = EP0_SETUP_PHASE; 152972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_ep0_out_start(dwc); 153072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 153172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 153272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 153372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 153472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 153572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbierr1: 153672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi __dwc3_gadget_ep_disable(dwc->eps[0]); 153772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 153872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbierr0: 153972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 154072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 154172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 154272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 154372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 154472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_stop(struct usb_gadget *g, 154572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct usb_gadget_driver *driver) 154672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 154772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 154872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 154972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 155072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 155172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 155272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi __dwc3_gadget_ep_disable(dwc->eps[0]); 155372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi __dwc3_gadget_ep_disable(dwc->eps[1]); 155472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 155572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver = NULL; 155672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.dev.driver = NULL; 155772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 155872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 155972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 156072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 156172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 1562802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman 156372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic const struct usb_gadget_ops dwc3_gadget_ops = { 156472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .get_frame = dwc3_gadget_get_frame, 156572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .wakeup = dwc3_gadget_wakeup, 156672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .set_selfpowered = dwc3_gadget_set_selfpowered, 156772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .pullup = dwc3_gadget_pullup, 156872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .udc_start = dwc3_gadget_start, 156972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .udc_stop = dwc3_gadget_stop, 157072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi}; 157172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 157272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 157372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 157472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int __devinit dwc3_gadget_init_endpoints(struct dwc3 *dwc) 157572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 157672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 157772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 epnum; 157872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 157972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi INIT_LIST_HEAD(&dwc->gadget.ep_list); 158072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 158172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi for (epnum = 0; epnum < DWC3_ENDPOINTS_NUM; epnum++) { 158272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = kzalloc(sizeof(*dep), GFP_KERNEL); 158372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dep) { 158472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "can't allocate endpoint %d\n", 158572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi epnum); 158672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -ENOMEM; 158772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 158872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 158972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->dwc = dwc; 159072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->number = epnum; 159172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->eps[epnum] = dep; 159272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 159372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi snprintf(dep->name, sizeof(dep->name), "ep%d%s", epnum >> 1, 159472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi (epnum & 1) ? "in" : "out"); 159572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->endpoint.name = dep->name; 159672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->direction = (epnum & 1); 159772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 159872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (epnum == 0 || epnum == 1) { 159972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->endpoint.maxpacket = 512; 160072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->endpoint.ops = &dwc3_gadget_ep0_ops; 160172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!epnum) 160272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ep0 = &dep->endpoint; 160372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 160472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 160572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 160672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->endpoint.maxpacket = 1024; 160712d36c16bde3ee0643d705caa87723de536dbe49Sebastian Andrzej Siewior dep->endpoint.max_streams = 15; 160872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->endpoint.ops = &dwc3_gadget_ep_ops; 160972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_add_tail(&dep->endpoint.ep_list, 161072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi &dwc->gadget.ep_list); 161172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 161272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_alloc_trb_pool(dep); 161325b8ff68bf1d4954d4a9dcb4862c6b6a53cb09e2Felipe Balbi if (ret) 161472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 161572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 161625b8ff68bf1d4954d4a9dcb4862c6b6a53cb09e2Felipe Balbi 161772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi INIT_LIST_HEAD(&dep->request_list); 161872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi INIT_LIST_HEAD(&dep->req_queued); 161972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 162072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 162172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 162272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 162372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 162472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_free_endpoints(struct dwc3 *dwc) 162572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 162672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 162772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 epnum; 162872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 162972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi for (epnum = 0; epnum < DWC3_ENDPOINTS_NUM; epnum++) { 163072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[epnum]; 163172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_free_trb_pool(dep); 163272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 163372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (epnum != 0 && epnum != 1) 163472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_del(&dep->endpoint.ep_list); 163572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 163672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi kfree(dep); 163772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 163872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 163972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 164072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_release(struct device *dev) 164172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 164272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dev, "%s\n", __func__); 164372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 164472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 164572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 164672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_cleanup_done_reqs(struct dwc3 *dwc, struct dwc3_ep *dep, 164772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct dwc3_event_depevt *event, int status) 164872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 164972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req; 1650f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi struct dwc3_trb *trb; 165172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned int count; 165272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned int s_pkt = 0; 1653d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand unsigned int trb_status; 165472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 165572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi do { 165672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req = next_request(&dep->req_queued); 1657d39ee7be2aaf0a53d7b5f43c13571bac95f7cc0cSebastian Andrzej Siewior if (!req) { 1658d39ee7be2aaf0a53d7b5f43c13571bac95f7cc0cSebastian Andrzej Siewior WARN_ON_ONCE(1); 1659d39ee7be2aaf0a53d7b5f43c13571bac95f7cc0cSebastian Andrzej Siewior return 1; 1660d39ee7be2aaf0a53d7b5f43c13571bac95f7cc0cSebastian Andrzej Siewior } 166172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1662f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb = req->trb; 166372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1664f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi if ((trb->ctrl & DWC3_TRB_CTRL_HWO) && status != -ESHUTDOWN) 16650d2f4758530d1598087d1d2f3e75b4f7d17fc6c7Sebastian Andrzej Siewior /* 16660d2f4758530d1598087d1d2f3e75b4f7d17fc6c7Sebastian Andrzej Siewior * We continue despite the error. There is not much we 16671d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * can do. If we don't clean it up we loop forever. If 16681d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * we skip the TRB then it gets overwritten after a 16691d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * while since we use them in a ring buffer. A BUG() 16701d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * would help. Lets hope that if this occurs, someone 16710d2f4758530d1598087d1d2f3e75b4f7d17fc6c7Sebastian Andrzej Siewior * fixes the root cause instead of looking away :) 16720d2f4758530d1598087d1d2f3e75b4f7d17fc6c7Sebastian Andrzej Siewior */ 167372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "%s's TRB (%p) still owned by HW\n", 167472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name, req->trb); 1675f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi count = trb->size & DWC3_TRB_SIZE_MASK; 167672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 167772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->direction) { 167872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (count) { 1679d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand trb_status = DWC3_TRB_SIZE_TRBSTS(trb->size); 1680d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand if (trb_status == DWC3_TRBSTS_MISSED_ISOC) { 1681d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand dev_dbg(dwc->dev, "incomplete IN transfer %s\n", 1682d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand dep->name); 1683d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand dep->current_uf = event->parameters & 1684d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand ~(dep->interval - 1); 1685d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand dep->flags |= DWC3_EP_MISSED_ISOC; 1686d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand } else { 1687d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand dev_err(dwc->dev, "incomplete IN transfer %s\n", 1688d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand dep->name); 1689d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand status = -ECONNRESET; 1690d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand } 169172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 169272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 169372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (count && (event->status & DEPEVT_STATUS_SHORT)) 169472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi s_pkt = 1; 169572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 169672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 169772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 169872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We assume here we will always receive the entire data block 169972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * which we should receive. Meaning, if we program RX to 170072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * receive 4K but we receive only 2K, we assume that's all we 170172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * should receive and we simply bounce the request back to the 170272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * gadget driver for further processing. 170372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 170472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.actual += req->request.length - count; 170572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_giveback(dep, req, status); 170672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (s_pkt) 170772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 1708f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi if ((event->status & DEPEVT_STATUS_LST) && 170970b674bfeb735557fc03cdc125ffe6d34218fcfdPratyush Anand (trb->ctrl & (DWC3_TRB_CTRL_LST | 171070b674bfeb735557fc03cdc125ffe6d34218fcfdPratyush Anand DWC3_TRB_CTRL_HWO))) 171172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 1712f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi if ((event->status & DEPEVT_STATUS_IOC) && 1713f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi (trb->ctrl & DWC3_TRB_CTRL_IOC)) 171472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 171572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } while (1); 171672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1717f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi if ((event->status & DEPEVT_STATUS_IOC) && 1718f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi (trb->ctrl & DWC3_TRB_CTRL_IOC)) 171972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 172072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 1; 172172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 172272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 172372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_endpoint_transfer_complete(struct dwc3 *dwc, 172472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep, const struct dwc3_event_depevt *event, 172572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int start_new) 172672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 172772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned status = 0; 172872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int clean_busy; 172972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 173072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (event->status & DEPEVT_STATUS_BUSERR) 173172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi status = -ECONNRESET; 173272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 17331d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman clean_busy = dwc3_cleanup_done_reqs(dwc, dep, event, status); 1734c2df85ca31645ed3c68c56bd30a3673e034224f1Paul Zimmerman if (clean_busy) 173572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags &= ~DWC3_EP_BUSY; 1736fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1737fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi /* 1738fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * WORKAROUND: This is the 2nd half of U1/U2 -> U0 workaround. 1739fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * See dwc3_gadget_linksts_change_interrupt() for 1st half. 1740fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi */ 1741fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi if (dwc->revision < DWC3_REVISION_183A) { 1742fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi u32 reg; 1743fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi int i; 1744fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1745fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi for (i = 0; i < DWC3_ENDPOINTS_NUM; i++) { 1746fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi struct dwc3_ep *dep = dwc->eps[i]; 1747fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1748fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) 1749fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi continue; 1750fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1751fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi if (!list_empty(&dep->req_queued)) 1752fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi return; 1753fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi } 1754fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1755fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 1756fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi reg |= dwc->u1u2; 1757fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 1758fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1759fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi dwc->u1u2 = 0; 1760fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi } 176172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 176272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 176372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_endpoint_interrupt(struct dwc3 *dwc, 176472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct dwc3_event_depevt *event) 176572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 176672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 176772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 epnum = event->endpoint_number; 176872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 176972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[epnum]; 177072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 177172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s: %s\n", dep->name, 177272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_ep_event_string(event->endpoint_event)); 177372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 177472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (epnum == 0 || epnum == 1) { 177572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_ep0_interrupt(dwc, event); 177672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 177772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 177872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 177972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (event->endpoint_event) { 178072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPEVT_XFERCOMPLETE: 1781c2df85ca31645ed3c68c56bd30a3673e034224f1Paul Zimmerman dep->res_trans_idx = 0; 1782c2df85ca31645ed3c68c56bd30a3673e034224f1Paul Zimmerman 178316e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if (usb_endpoint_xfer_isoc(dep->endpoint.desc)) { 178472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "%s is an Isochronous endpoint\n", 178572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 178672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 178772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 178872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 178972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_endpoint_transfer_complete(dwc, dep, event, 1); 179072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 179172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPEVT_XFERINPROGRESS: 179216e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if (!usb_endpoint_xfer_isoc(dep->endpoint.desc)) { 179372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "%s is not an Isochronous endpoint\n", 179472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 179572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 179672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 179772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 179872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_endpoint_transfer_complete(dwc, dep, event, 0); 179972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 180072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPEVT_XFERNOTREADY: 180116e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if (usb_endpoint_xfer_isoc(dep->endpoint.desc)) { 180272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_start_isoc(dwc, dep, event); 180372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 180472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 180572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 180672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s: reason %s\n", 180740aa41fba348bc5bd19ff5bcf2b03d67bb01d1ceFelipe Balbi dep->name, event->status & 180840aa41fba348bc5bd19ff5bcf2b03d67bb01d1ceFelipe Balbi DEPEVT_STATUS_TRANSFER_ACTIVE 180972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ? "Transfer Active" 181072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi : "Transfer Not Active"); 181172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 181272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = __dwc3_gadget_kick_transfer(dep, 0, 1); 181372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!ret || ret == -EBUSY) 181472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 181572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 181672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "%s: failed to kick transfers\n", 181772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 181872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 181972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 182072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 1821879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi case DWC3_DEPEVT_STREAMEVT: 182216e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if (!usb_endpoint_xfer_bulk(dep->endpoint.desc)) { 1823879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dev_err(dwc->dev, "Stream event for non-Bulk %s\n", 1824879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dep->name); 1825879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi return; 1826879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi } 1827879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi 1828879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi switch (event->status) { 1829879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi case DEPEVT_STREAMEVT_FOUND: 1830879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dev_vdbg(dwc->dev, "Stream %d found and started\n", 1831879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi event->parameters); 1832879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi 1833879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi break; 1834879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi case DEPEVT_STREAMEVT_NOTFOUND: 1835879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi /* FALLTHROUGH */ 1836879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi default: 1837879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dev_dbg(dwc->dev, "Couldn't find suitable stream\n"); 1838879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi } 1839879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi break; 184072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPEVT_RXTXFIFOEVT: 184172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "%s FIFO Overrun\n", dep->name); 184272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 184372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPEVT_EPCMDCMPLT: 1844ea53b8828c50b7a5138a8931c41b2671682c86b5Felipe Balbi dev_vdbg(dwc->dev, "Endpoint Command Complete\n"); 184572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 184672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 184772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 184872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 184972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_disconnect_gadget(struct dwc3 *dwc) 185072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 185172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dwc->gadget_driver && dwc->gadget_driver->disconnect) { 185272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock(&dwc->lock); 185372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver->disconnect(&dwc->gadget); 185472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock(&dwc->lock); 185572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 185672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 185772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 185872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_stop_active_transfer(struct dwc3 *dwc, u32 epnum) 185972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 186072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 186172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 186272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 cmd; 186372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 186472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 186572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[epnum]; 186672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1867624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior WARN_ON(!dep->res_trans_idx); 186872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->res_trans_idx) { 186972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd = DWC3_DEPCMD_ENDTRANSFER; 187072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd |= DWC3_DEPCMD_HIPRI_FORCERM | DWC3_DEPCMD_CMDIOC; 187172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd |= DWC3_DEPCMD_PARAM(dep->res_trans_idx); 187272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0, sizeof(params)); 187372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, cmd, ¶ms); 187472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi WARN_ON_ONCE(ret); 1875a1ae9be5fc137d7e911a77ef408273ff55a53a39Sebastian Andrzej Siewior dep->res_trans_idx = 0; 187672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 187772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 187872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 187972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_stop_active_transfers(struct dwc3 *dwc) 188072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 188172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 epnum; 188272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 188372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi for (epnum = 2; epnum < DWC3_ENDPOINTS_NUM; epnum++) { 188472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 188572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 188672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[epnum]; 188772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) 188872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi continue; 188972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1890624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior dwc3_remove_requests(dwc, dep); 189172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 189272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 189372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 189472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_clear_stall_all_ep(struct dwc3 *dwc) 189572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 189672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 epnum; 189772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 189872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi for (epnum = 1; epnum < DWC3_ENDPOINTS_NUM; epnum++) { 189972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 190072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 190172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 190272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 190372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[epnum]; 190472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 190572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(dep->flags & DWC3_EP_STALL)) 190672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi continue; 190772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 190872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags &= ~DWC3_EP_STALL; 190972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 191072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0, sizeof(params)); 191172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, 191272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEPCMD_CLEARSTALL, ¶ms); 191372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi WARN_ON_ONCE(ret); 191472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 191572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 191672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 191772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_disconnect_interrupt(struct dwc3 *dwc) 191872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 1919c4430a26948b84c0d820e83f8c640229f960d3b6Felipe Balbi int reg; 1920c4430a26948b84c0d820e83f8c640229f960d3b6Felipe Balbi 192172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s\n", __func__); 192272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 192372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 192472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DCTL_INITU1ENA; 192572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 192672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 192772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DCTL_INITU2ENA; 192872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 192972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 193072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_stop_active_transfers(dwc); 193172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_disconnect_gadget(dwc); 1932b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman dwc->start_config_issued = false; 193372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 193472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_UNKNOWN; 1935df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi dwc->setup_packet_pending = false; 193672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 193772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1938d7a46a8dfc45191b39daa19c05d3ff74d1881f15Paul Zimmermanstatic void dwc3_gadget_usb3_phy_suspend(struct dwc3 *dwc, int suspend) 193972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 194072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 194172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 194272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(0)); 194372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1944d7a46a8dfc45191b39daa19c05d3ff74d1881f15Paul Zimmerman if (suspend) 194572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg |= DWC3_GUSB3PIPECTL_SUSPHY; 1946d7a46a8dfc45191b39daa19c05d3ff74d1881f15Paul Zimmerman else 1947d7a46a8dfc45191b39daa19c05d3ff74d1881f15Paul Zimmerman reg &= ~DWC3_GUSB3PIPECTL_SUSPHY; 194872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 194972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg); 195072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 195172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1952d7a46a8dfc45191b39daa19c05d3ff74d1881f15Paul Zimmermanstatic void dwc3_gadget_usb2_phy_suspend(struct dwc3 *dwc, int suspend) 195372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 195472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 195572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 195672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0)); 195772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1958d7a46a8dfc45191b39daa19c05d3ff74d1881f15Paul Zimmerman if (suspend) 195972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg |= DWC3_GUSB2PHYCFG_SUSPHY; 1960d7a46a8dfc45191b39daa19c05d3ff74d1881f15Paul Zimmerman else 1961d7a46a8dfc45191b39daa19c05d3ff74d1881f15Paul Zimmerman reg &= ~DWC3_GUSB2PHYCFG_SUSPHY; 196272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 196372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg); 196472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 196572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 196672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_reset_interrupt(struct dwc3 *dwc) 196772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 196872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 196972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 197072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s\n", __func__); 197172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1972df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi /* 1973df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * WORKAROUND: DWC3 revisions <1.88a have an issue which 1974df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * would cause a missing Disconnect Event if there's a 1975df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * pending Setup Packet in the FIFO. 1976df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * 1977df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * There's no suggested workaround on the official Bug 1978df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * report, which states that "unless the driver/application 1979df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * is doing any special handling of a disconnect event, 1980df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * there is no functional issue". 1981df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * 1982df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * Unfortunately, it turns out that we _do_ some special 1983df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * handling of a disconnect event, namely complete all 1984df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * pending transfers, notify gadget driver of the 1985df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * disconnection, and so on. 1986df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * 1987df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * Our suggested workaround is to follow the Disconnect 1988df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * Event steps here, instead, based on a setup_packet_pending 1989df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * flag. Such flag gets set whenever we have a XferNotReady 1990df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * event on EP0 and gets cleared on XferComplete for the 1991df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * same endpoint. 1992df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * 1993df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * Refers to: 1994df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * 1995df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * STAR#9000466709: RTL: Device : Disconnect event not 1996df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * generated if setup packet pending in FIFO 1997df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi */ 1998df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi if (dwc->revision < DWC3_REVISION_188A) { 1999df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi if (dwc->setup_packet_pending) 2000df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi dwc3_gadget_disconnect_interrupt(dwc); 2001df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi } 2002df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi 2003961906edb549c95f4cc33e4f3dbfd0fcc364954dFelipe Balbi /* after reset -> Default State */ 2004961906edb549c95f4cc33e4f3dbfd0fcc364954dFelipe Balbi dwc->dev_state = DWC3_DEFAULT_STATE; 2005961906edb549c95f4cc33e4f3dbfd0fcc364954dFelipe Balbi 2006802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman /* Recent versions support automatic phy suspend and don't need this */ 2007802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman if (dwc->revision < DWC3_REVISION_194A) { 2008802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman /* Resume PHYs */ 2009802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman dwc3_gadget_usb2_phy_suspend(dwc, false); 2010802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman dwc3_gadget_usb3_phy_suspend(dwc, false); 2011802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman } 201272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 201372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dwc->gadget.speed != USB_SPEED_UNKNOWN) 201472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_disconnect_gadget(dwc); 201572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 201672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 201772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DCTL_TSTCTRL_MASK; 2018e6a3b5e2888b51e37c65c97dae966f793bc4806aSebastian Andrzej Siewior reg &= ~(DWC3_DCTL_INITU1ENA | DWC3_DCTL_INITU2ENA); 20195cbe8c220c1e126dd0855ad57fe4491b267132b9Gerard CAUVY reg |= (DWC3_DCTL_ACCEPTU1ENA | DWC3_DCTL_ACCEPTU2ENA); 202072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 20213b637367ae40b6d3c20e30cb0cdd059e67bbf848Gerard Cauvy dwc->test_mode = false; 202272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 202372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_stop_active_transfers(dwc); 202472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_clear_stall_all_ep(dwc); 2025b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman dwc->start_config_issued = false; 202672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 202772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* Reset device address to zero */ 202872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCFG); 202972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~(DWC3_DCFG_DEVADDR_MASK); 203072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCFG, reg); 203172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 203272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 203372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_update_ram_clk_sel(struct dwc3 *dwc, u32 speed) 203472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 203572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 203672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 usb30_clock = DWC3_GCTL_CLK_BUS; 203772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 203872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 203972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We change the clock only at SS but I dunno why I would want to do 204072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * this. Maybe it becomes part of the power saving plan. 204172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 204272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 204372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (speed != DWC3_DSTS_SUPERSPEED) 204472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 204572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 204672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 204772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * RAMClkSel is reset to 0 after USB reset, so it must be reprogrammed 204872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * each time on Connect Done. 204972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 205072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!usb30_clock) 205172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 205272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 205372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_GCTL); 205472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg |= DWC3_GCTL_RAMCLKSEL(usb30_clock); 205572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_GCTL, reg); 205672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 205772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 2058d7a46a8dfc45191b39daa19c05d3ff74d1881f15Paul Zimmermanstatic void dwc3_gadget_phy_suspend(struct dwc3 *dwc, u8 speed) 205972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 206072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (speed) { 206172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_SPEED_SUPER: 2062d7a46a8dfc45191b39daa19c05d3ff74d1881f15Paul Zimmerman dwc3_gadget_usb2_phy_suspend(dwc, true); 206372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 206472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_SPEED_HIGH: 206572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_SPEED_FULL: 206672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_SPEED_LOW: 2067d7a46a8dfc45191b39daa19c05d3ff74d1881f15Paul Zimmerman dwc3_gadget_usb3_phy_suspend(dwc, true); 206872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 206972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 207072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 207172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 207272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_conndone_interrupt(struct dwc3 *dwc) 207372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 207472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 207572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 207672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 207772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 207872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 speed; 207972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 208072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s\n", __func__); 208172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 208272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0x00, sizeof(params)); 208372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 208472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 208572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi speed = reg & DWC3_DSTS_CONNECTSPD; 208672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->speed = speed; 208772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 208872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_update_ram_clk_sel(dwc, speed); 208972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 209072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (speed) { 209172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DCFG_SUPERSPEED: 209205870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi /* 209305870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * WORKAROUND: DWC3 revisions <1.90a have an issue which 209405870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * would cause a missing USB3 Reset event. 209505870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * 209605870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * In such situations, we should force a USB3 Reset 209705870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * event by calling our dwc3_gadget_reset_interrupt() 209805870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * routine. 209905870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * 210005870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * Refers to: 210105870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * 210205870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * STAR#9000483510: RTL: SS : USB3 reset event may 210305870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * not be generated always when the link enters poll 210405870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi */ 210505870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi if (dwc->revision < DWC3_REVISION_190A) 210605870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi dwc3_gadget_reset_interrupt(dwc); 210705870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi 210872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(512); 210972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ep0->maxpacket = 512; 211072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_SUPER; 211172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 211272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DCFG_HIGHSPEED: 211372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(64); 211472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ep0->maxpacket = 64; 211572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_HIGH; 211672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 211772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DCFG_FULLSPEED2: 211872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DCFG_FULLSPEED1: 211972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(64); 212072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ep0->maxpacket = 64; 212172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_FULL; 212272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 212372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DCFG_LOWSPEED: 212472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(8); 212572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ep0->maxpacket = 8; 212672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_LOW; 212772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 212872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 212972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 2130802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman /* Recent versions support automatic phy suspend and don't need this */ 2131802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman if (dwc->revision < DWC3_REVISION_194A) { 2132802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman /* Suspend unneeded PHY */ 2133802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman dwc3_gadget_phy_suspend(dwc, dwc->gadget.speed); 2134802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman } 213572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 213672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[0]; 2137c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL); 213872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 213972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to enable %s\n", dep->name); 214072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 214172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 214272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 214372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[1]; 2144c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL); 214572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 214672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to enable %s\n", dep->name); 214772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 214872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 214972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 215072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 215172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Configure PHY via GUSB3PIPECTLn if required. 215272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 215372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Update GTXFIFOSIZn 215472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 215572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * In both cases reset values should be sufficient. 215672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 215772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 215872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 215972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_wakeup_interrupt(struct dwc3 *dwc) 216072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 216172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s\n", __func__); 216272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 216372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 216472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * TODO take core out of low power mode when that's 216572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * implemented. 216672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 216772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 216872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver->resume(&dwc->gadget); 216972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 217072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 217172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_linksts_change_interrupt(struct dwc3 *dwc, 217272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned int evtinfo) 217372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 2174fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi enum dwc3_link_state next = evtinfo & DWC3_LINK_STATE_MASK; 2175fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 2176fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi /* 2177fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * WORKAROUND: DWC3 Revisions <1.83a have an issue which, depending 2178fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * on the link partner, the USB session might do multiple entry/exit 2179fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * of low power states before a transfer takes place. 2180fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * 2181fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * Due to this problem, we might experience lower throughput. The 2182fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * suggested workaround is to disable DCTL[12:9] bits if we're 2183fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * transitioning from U1/U2 to U0 and enable those bits again 2184fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * after a transfer completes and there are no pending transfers 2185fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * on any of the enabled endpoints. 2186fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * 2187fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * This is the first half of that workaround. 2188fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * 2189fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * Refers to: 2190fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * 2191fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * STAR#9000446952: RTL: Device SS : if U1/U2 ->U0 takes >128us 2192fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * core send LGO_Ux entering U0 2193fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi */ 2194fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi if (dwc->revision < DWC3_REVISION_183A) { 2195fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi if (next == DWC3_LINK_STATE_U0) { 2196fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi u32 u1u2; 2197fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi u32 reg; 2198fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 2199fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi switch (dwc->link_state) { 2200fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi case DWC3_LINK_STATE_U1: 2201fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi case DWC3_LINK_STATE_U2: 2202fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 2203fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi u1u2 = reg & (DWC3_DCTL_INITU2ENA 2204fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi | DWC3_DCTL_ACCEPTU2ENA 2205fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi | DWC3_DCTL_INITU1ENA 2206fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi | DWC3_DCTL_ACCEPTU1ENA); 2207fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 2208fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi if (!dwc->u1u2) 2209fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi dwc->u1u2 = reg & u1u2; 2210fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 2211fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi reg &= ~u1u2; 2212fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 2213fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 2214fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi break; 2215fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi default: 2216fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi /* do nothing */ 2217fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi break; 2218fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi } 2219fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi } 2220fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi } 2221fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 2222fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi dwc->link_state = next; 2223019ac83252dc2b356cb0ca81c25a077ec90309e7Felipe Balbi 2224019ac83252dc2b356cb0ca81c25a077ec90309e7Felipe Balbi dev_vdbg(dwc->dev, "%s link %d\n", __func__, dwc->link_state); 222572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 222672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 222772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_interrupt(struct dwc3 *dwc, 222872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct dwc3_event_devt *event) 222972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 223072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (event->type) { 223172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_DISCONNECT: 223272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_disconnect_interrupt(dwc); 223372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 223472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_RESET: 223572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_reset_interrupt(dwc); 223672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 223772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_CONNECT_DONE: 223872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_conndone_interrupt(dwc); 223972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 224072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_WAKEUP: 224172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_wakeup_interrupt(dwc); 224272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 224372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_LINK_STATUS_CHANGE: 224472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_linksts_change_interrupt(dwc, event->event_info); 224572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 224672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_EOPF: 224772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "End of Periodic Frame\n"); 224872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 224972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_SOF: 225072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "Start of Periodic Frame\n"); 225172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 225272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_ERRATIC_ERROR: 225372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "Erratic Error\n"); 225472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 225572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_CMD_CMPL: 225672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "Command Complete\n"); 225772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 225872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_OVERFLOW: 225972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "Overflow\n"); 226072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 226172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 226272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "UNKNOWN IRQ %d\n", event->type); 226372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 226472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 226572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 226672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_process_event_entry(struct dwc3 *dwc, 226772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const union dwc3_event *event) 226872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 226972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* Endpoint IRQ, handle it and return early */ 227072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (event->type.is_devspec == 0) { 227172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* depevt */ 227272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return dwc3_endpoint_interrupt(dwc, &event->depevt); 227372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 227472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 227572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (event->type.type) { 227672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_EVENT_TYPE_DEV: 227772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_interrupt(dwc, &event->devt); 227872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 227972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* REVISIT what to do with Carkit and I2C events ? */ 228072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 228172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "UNKNOWN IRQ type %d\n", event->raw); 228272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 228372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 228472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 228572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic irqreturn_t dwc3_process_event_buf(struct dwc3 *dwc, u32 buf) 228672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 228772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_event_buffer *evt; 228872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int left; 228972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 count; 229072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 229172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi count = dwc3_readl(dwc->regs, DWC3_GEVNTCOUNT(buf)); 229272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi count &= DWC3_GEVNTCOUNT_MASK; 229372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!count) 229472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return IRQ_NONE; 229572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 229672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi evt = dwc->ev_buffs[buf]; 229772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi left = count; 229872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 229972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi while (left > 0) { 230072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi union dwc3_event event; 230172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 2302d70d84423cbc5d6d929640189cf204e693024309Felipe Balbi event.raw = *(u32 *) (evt->buf + evt->lpos); 2303d70d84423cbc5d6d929640189cf204e693024309Felipe Balbi 230472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_process_event_entry(dwc, &event); 230572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 230672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * XXX we wrap around correctly to the next entry as almost all 230772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * entries are 4 bytes in size. There is one entry which has 12 230872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * bytes which is a regular entry followed by 8 bytes data. ATM 230972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * I don't know how things are organized if were get next to the 231072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * a boundary so I worry about that once we try to handle that. 231172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 231272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi evt->lpos = (evt->lpos + 4) % DWC3_EVENT_BUFFERS_SIZE; 231372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi left -= 4; 231472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 231572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_GEVNTCOUNT(buf), 4); 231672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 231772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 231872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return IRQ_HANDLED; 231972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 232072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 232172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic irqreturn_t dwc3_interrupt(int irq, void *_dwc) 232272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 232372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = _dwc; 232472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int i; 232572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi irqreturn_t ret = IRQ_NONE; 232672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 232772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock(&dwc->lock); 232872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 23299f622b2a407d8b34a5a7f5b4abd8b29b25cf4f32Felipe Balbi for (i = 0; i < dwc->num_event_buffers; i++) { 233072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi irqreturn_t status; 233172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 233272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi status = dwc3_process_event_buf(dwc, i); 233372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (status == IRQ_HANDLED) 233472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = status; 233572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 233672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 233772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock(&dwc->lock); 233872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 233972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 234072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 234172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 234272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/** 234372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * dwc3_gadget_init - Initializes gadget related registers 23441d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * @dwc: pointer to our controller context structure 234572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 234672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Returns 0 on success otherwise negative errno. 234772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 234872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiint __devinit dwc3_gadget_init(struct dwc3 *dwc) 234972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 235072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 235172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 235272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int irq; 235372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 235472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ctrl_req = dma_alloc_coherent(dwc->dev, sizeof(*dwc->ctrl_req), 235572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi &dwc->ctrl_req_addr, GFP_KERNEL); 235672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dwc->ctrl_req) { 235772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to allocate ctrl request\n"); 235872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -ENOMEM; 235972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto err0; 236072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 236172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 236272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ep0_trb = dma_alloc_coherent(dwc->dev, sizeof(*dwc->ep0_trb), 236372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi &dwc->ep0_trb_addr, GFP_KERNEL); 236472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dwc->ep0_trb) { 236572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to allocate ep0 trb\n"); 236672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -ENOMEM; 236772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto err1; 236872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 236972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 23703ef35fafdc87b72851f7785dc5331a0f4eb1b3ceFelipe Balbi dwc->setup_buf = kzalloc(DWC3_EP0_BOUNCE_SIZE, GFP_KERNEL); 237172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dwc->setup_buf) { 237272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to allocate setup buffer\n"); 237372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -ENOMEM; 237472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto err2; 237572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 237672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 23775812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi dwc->ep0_bounce = dma_alloc_coherent(dwc->dev, 23783ef35fafdc87b72851f7785dc5331a0f4eb1b3ceFelipe Balbi DWC3_EP0_BOUNCE_SIZE, &dwc->ep0_bounce_addr, 23793ef35fafdc87b72851f7785dc5331a0f4eb1b3ceFelipe Balbi GFP_KERNEL); 23805812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi if (!dwc->ep0_bounce) { 23815812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi dev_err(dwc->dev, "failed to allocate ep0 bounce buffer\n"); 23825812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi ret = -ENOMEM; 23835812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi goto err3; 23845812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi } 23855812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi 238672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_set_name(&dwc->gadget.dev, "gadget"); 238772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 238872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ops = &dwc3_gadget_ops; 2389d327ab5b6d660d6fe22b073b743fde1668e593bbMichal Nazarewicz dwc->gadget.max_speed = USB_SPEED_SUPER; 239072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_UNKNOWN; 239172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.dev.parent = dwc->dev; 2392eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dwc->gadget.sg_supported = true; 239372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 239472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_set_coherent_mask(&dwc->gadget.dev, dwc->dev->coherent_dma_mask); 239572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 239672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.dev.dma_parms = dwc->dev->dma_parms; 239772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.dev.dma_mask = dwc->dev->dma_mask; 239872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.dev.release = dwc3_gadget_release; 239972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.name = "dwc3-gadget"; 240072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 240172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 240272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * REVISIT: Here we should clear all pending IRQs to be 240372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * sure we're starting from a well known location. 240472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 240572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 240672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_gadget_init_endpoints(dwc); 240772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 24085812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi goto err4; 240972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 241072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi irq = platform_get_irq(to_platform_device(dwc->dev), 0); 241172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 241272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = request_irq(irq, dwc3_interrupt, IRQF_SHARED, 241372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi "dwc3", dwc); 241472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 241572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to request irq #%d --> %d\n", 241672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi irq, ret); 24175812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi goto err5; 241872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 241972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 2420e6a3b5e2888b51e37c65c97dae966f793bc4806aSebastian Andrzej Siewior reg = dwc3_readl(dwc->regs, DWC3_DCFG); 2421e6a3b5e2888b51e37c65c97dae966f793bc4806aSebastian Andrzej Siewior reg |= DWC3_DCFG_LPM_CAP; 2422e6a3b5e2888b51e37c65c97dae966f793bc4806aSebastian Andrzej Siewior dwc3_writel(dwc->regs, DWC3_DCFG, reg); 2423e6a3b5e2888b51e37c65c97dae966f793bc4806aSebastian Andrzej Siewior 242472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* Enable all but Start and End of Frame IRQs */ 242572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = (DWC3_DEVTEN_VNDRDEVTSTRCVEDEN | 242672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEVTEN_EVNTOVERFLOWEN | 242772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEVTEN_CMDCMPLTEN | 242872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEVTEN_ERRTICERREN | 242972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEVTEN_WKUPEVTEN | 243072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEVTEN_ULSTCNGEN | 243172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEVTEN_CONNECTDONEEN | 243272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEVTEN_USBRSTEN | 243372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEVTEN_DISCONNEVTEN); 243472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEVTEN, reg); 243572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 2436802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman /* Enable USB2 LPM and automatic phy suspend only on recent versions */ 2437802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman if (dwc->revision >= DWC3_REVISION_194A) { 2438802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman reg = dwc3_readl(dwc->regs, DWC3_DCFG); 2439802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman reg |= DWC3_DCFG_LPM_CAP; 2440802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman dwc3_writel(dwc->regs, DWC3_DCFG, reg); 2441802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman 2442802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman reg = dwc3_readl(dwc->regs, DWC3_DCTL); 2443802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman reg &= ~(DWC3_DCTL_HIRD_THRES_MASK | DWC3_DCTL_L1_HIBER_EN); 2444802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman 2445802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman /* TODO: This should be configurable */ 2446802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman reg |= DWC3_DCTL_HIRD_THRES(31); 2447802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman 2448802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman dwc3_writel(dwc->regs, DWC3_DCTL, reg); 2449802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman 2450802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman dwc3_gadget_usb2_phy_suspend(dwc, true); 2451802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman dwc3_gadget_usb3_phy_suspend(dwc, true); 2452802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman } 2453802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman 245472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = device_register(&dwc->gadget.dev); 245572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 245672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to register gadget device\n"); 245772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi put_device(&dwc->gadget.dev); 24585812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi goto err6; 245972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 246072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 246172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = usb_add_gadget_udc(dwc->dev, &dwc->gadget); 246272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 246372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to register udc\n"); 24645812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi goto err7; 246572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 246672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 246772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 246872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 24695812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbierr7: 247072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi device_unregister(&dwc->gadget.dev); 247172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 24725812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbierr6: 247372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEVTEN, 0x00); 247472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi free_irq(irq, dwc); 247572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 24765812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbierr5: 247772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_free_endpoints(dwc); 247872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 24795812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbierr4: 24803ef35fafdc87b72851f7785dc5331a0f4eb1b3ceFelipe Balbi dma_free_coherent(dwc->dev, DWC3_EP0_BOUNCE_SIZE, 24813ef35fafdc87b72851f7785dc5331a0f4eb1b3ceFelipe Balbi dwc->ep0_bounce, dwc->ep0_bounce_addr); 24825812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi 248372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbierr3: 24840fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi kfree(dwc->setup_buf); 248572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 248672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbierr2: 248772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(*dwc->ep0_trb), 248872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ep0_trb, dwc->ep0_trb_addr); 248972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 249072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbierr1: 249172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(*dwc->ctrl_req), 249272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ctrl_req, dwc->ctrl_req_addr); 249372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 249472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbierr0: 249572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 249672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 249772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 249872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbivoid dwc3_gadget_exit(struct dwc3 *dwc) 249972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 250072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int irq; 250172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 250272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi usb_del_gadget_udc(&dwc->gadget); 250372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi irq = platform_get_irq(to_platform_device(dwc->dev), 0); 250472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 250572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEVTEN, 0x00); 250672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi free_irq(irq, dwc); 250772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 250872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_free_endpoints(dwc); 250972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 25103ef35fafdc87b72851f7785dc5331a0f4eb1b3ceFelipe Balbi dma_free_coherent(dwc->dev, DWC3_EP0_BOUNCE_SIZE, 25113ef35fafdc87b72851f7785dc5331a0f4eb1b3ceFelipe Balbi dwc->ep0_bounce, dwc->ep0_bounce_addr); 25125812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi 25130fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi kfree(dwc->setup_buf); 251472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 251572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(*dwc->ep0_trb), 251672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ep0_trb, dwc->ep0_trb_addr); 251772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 251872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(*dwc->ctrl_req), 251972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ctrl_req, dwc->ctrl_req_addr); 252072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 252172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi device_unregister(&dwc->gadget.dev); 252272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 2523