gadget.c revision 8698e2acf3a5e8d6f260ca7675f94e5087df5ae8
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; 244e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand int i; 24572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 24672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (req->queued) { 247e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand i = 0; 248e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand do { 249eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dep->busy_slot++; 250e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand /* 251e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * Skip LINK TRB. We can't use req->trb and check for 252e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * DWC3_TRBCTL_LINK_TRB because it points the TRB we 253e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * just completed (not the LINK TRB). 254e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand */ 255e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if (((dep->busy_slot & DWC3_TRB_MASK) == 256e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand DWC3_TRB_NUM- 1) && 25716e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz usb_endpoint_xfer_isoc(dep->endpoint.desc)) 258e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand dep->busy_slot++; 259e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand } while(++i < req->request.num_mapped_sgs); 260c9fda7d6f62a6520e01652d370654c5657d3c1a1Pratyush Anand req->queued = false; 26172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 26272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_del(&req->list); 263eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi req->trb = NULL; 26472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 26572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (req->request.status == -EINPROGRESS) 26672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.status = status; 26772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 2680416e494ce7dc84e2719bc9fb7daecb330476074Pratyush Anand if (dwc->ep0_bounced && dep->number == 0) 2690416e494ce7dc84e2719bc9fb7daecb330476074Pratyush Anand dwc->ep0_bounced = false; 2700416e494ce7dc84e2719bc9fb7daecb330476074Pratyush Anand else 2710416e494ce7dc84e2719bc9fb7daecb330476074Pratyush Anand usb_gadget_unmap_request(&dwc->gadget, &req->request, 2720416e494ce7dc84e2719bc9fb7daecb330476074Pratyush Anand req->direction); 27372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 27472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "request %p from %s completed %d/%d ===> %d\n", 27572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req, dep->name, req->request.actual, 27672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.length, status); 27772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 27872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock(&dwc->lock); 2790fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi req->request.complete(&dep->endpoint, &req->request); 28072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock(&dwc->lock); 28172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 28272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 28372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic const char *dwc3_gadget_ep_cmd_string(u8 cmd) 28472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 28572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (cmd) { 28672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_DEPSTARTCFG: 28772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Start New Configuration"; 28872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_ENDTRANSFER: 28972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "End Transfer"; 29072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_UPDATETRANSFER: 29172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Update Transfer"; 29272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_STARTTRANSFER: 29372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Start Transfer"; 29472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_CLEARSTALL: 29572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Clear Stall"; 29672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_SETSTALL: 29772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Set Stall"; 298802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman case DWC3_DEPCMD_GETEPSTATE: 299802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman return "Get Endpoint State"; 30072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_SETTRANSFRESOURCE: 30172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Set Endpoint Transfer Resource"; 30272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_SETEPCONFIG: 30372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Set Endpoint Configuration"; 30472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 30572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "UNKNOWN command"; 30672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 30772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 30872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 309b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbiint dwc3_send_gadget_generic_command(struct dwc3 *dwc, int cmd, u32 param) 310b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi{ 311b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi u32 timeout = 500; 312b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi u32 reg; 313b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi 314b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi dwc3_writel(dwc->regs, DWC3_DGCMDPAR, param); 315b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi dwc3_writel(dwc->regs, DWC3_DGCMD, cmd | DWC3_DGCMD_CMDACT); 316b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi 317b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi do { 318b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DGCMD); 319b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi if (!(reg & DWC3_DGCMD_CMDACT)) { 320b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi dev_vdbg(dwc->dev, "Command Complete --> %d\n", 321b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi DWC3_DGCMD_STATUS(reg)); 322b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi return 0; 323b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi } 324b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi 325b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi /* 326b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi * We can't sleep here, because it's also called from 327b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi * interrupt context. 328b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi */ 329b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi timeout--; 330b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi if (!timeout) 331b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi return -ETIMEDOUT; 332b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi udelay(1); 333b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi } while (1); 334b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi} 335b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi 33672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiint dwc3_send_gadget_ep_cmd(struct dwc3 *dwc, unsigned ep, 33772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned cmd, struct dwc3_gadget_ep_cmd_params *params) 33872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 33972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = dwc->eps[ep]; 34061d58242f634642de42d6a4098913b7254a65053Sebastian Andrzej Siewior u32 timeout = 500; 34172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 34272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 34372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s: cmd '%s' params %08x %08x %08x\n", 34472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name, 345dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi dwc3_gadget_ep_cmd_string(cmd), params->param0, 346dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params->param1, params->param2); 34772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 348dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEPCMDPAR0(ep), params->param0); 349dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEPCMDPAR1(ep), params->param1); 350dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEPCMDPAR2(ep), params->param2); 35172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 35272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEPCMD(ep), cmd | DWC3_DEPCMD_CMDACT); 35372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi do { 35472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DEPCMD(ep)); 35572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(reg & DWC3_DEPCMD_CMDACT)) { 356164f6e141ed214bda30fb219d41ec3254bd90886Felipe Balbi dev_vdbg(dwc->dev, "Command Complete --> %d\n", 357164f6e141ed214bda30fb219d41ec3254bd90886Felipe Balbi DWC3_DEPCMD_STATUS(reg)); 35872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 35972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 36072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 36172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 36272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We can't sleep here, because it is also called from 36372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * interrupt context. 36472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 36572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi timeout--; 36672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!timeout) 36772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -ETIMEDOUT; 36872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 36961d58242f634642de42d6a4098913b7254a65053Sebastian Andrzej Siewior udelay(1); 37072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } while (1); 37172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 37272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 37372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic dma_addr_t dwc3_trb_dma_offset(struct dwc3_ep *dep, 374f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi struct dwc3_trb *trb) 37572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 376c439ef87c33a1df30f528cb152151465c2529cacPaul Zimmerman u32 offset = (char *) trb - (char *) dep->trb_pool; 37772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 37872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return dep->trb_pool_dma + offset; 37972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 38072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 38172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_alloc_trb_pool(struct dwc3_ep *dep) 38272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 38372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 38472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 38572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->trb_pool) 38672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 38772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 38872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->number == 0 || dep->number == 1) 38972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 39072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 39172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->trb_pool = dma_alloc_coherent(dwc->dev, 39272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi sizeof(struct dwc3_trb) * DWC3_TRB_NUM, 39372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi &dep->trb_pool_dma, GFP_KERNEL); 39472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dep->trb_pool) { 39572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dep->dwc->dev, "failed to allocate trb pool for %s\n", 39672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 39772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -ENOMEM; 39872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 39972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 40072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 40172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 40272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 40372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_free_trb_pool(struct dwc3_ep *dep) 40472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 40572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 40672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 40772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(struct dwc3_trb) * DWC3_TRB_NUM, 40872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->trb_pool, dep->trb_pool_dma); 40972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 41072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->trb_pool = NULL; 41172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->trb_pool_dma = 0; 41272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 41372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 41472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_start_config(struct dwc3 *dwc, struct dwc3_ep *dep) 41572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 41672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 41772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 cmd; 41872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 41972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0x00, sizeof(params)); 42072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 42172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->number != 1) { 42272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd = DWC3_DEPCMD_DEPSTARTCFG; 42372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* XferRscIdx == 0 for ep0 and 2 for the remaining */ 424b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman if (dep->number > 1) { 425b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman if (dwc->start_config_issued) 426b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman return 0; 427b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman dwc->start_config_issued = true; 42872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd |= DWC3_DEPCMD_PARAM(2); 429b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman } 43072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 43172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return dwc3_send_gadget_ep_cmd(dwc, 0, cmd, ¶ms); 43272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 43372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 43472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 43572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 43672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 43772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_set_ep_config(struct dwc3 *dwc, struct dwc3_ep *dep, 438c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi const struct usb_endpoint_descriptor *desc, 4394b345c9a3c7452340fb477868d8db475f05978b1Felipe Balbi const struct usb_ss_ep_comp_descriptor *comp_desc, 4404b345c9a3c7452340fb477868d8db475f05978b1Felipe Balbi bool ignore) 44172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 44272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 44372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 44472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0x00, sizeof(params)); 44572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 446dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param0 = DWC3_DEPCFG_EP_TYPE(usb_endpoint_type(desc)) 447d2e9a13a388304bc2a7b25a6c34c6e2ab1540a5dChanho Park | DWC3_DEPCFG_MAX_PACKET_SIZE(usb_endpoint_maxp(desc)); 448d2e9a13a388304bc2a7b25a6c34c6e2ab1540a5dChanho Park 449d2e9a13a388304bc2a7b25a6c34c6e2ab1540a5dChanho Park /* Burst size is only needed in SuperSpeed mode */ 450d2e9a13a388304bc2a7b25a6c34c6e2ab1540a5dChanho Park if (dwc->gadget.speed == USB_SPEED_SUPER) { 451d2e9a13a388304bc2a7b25a6c34c6e2ab1540a5dChanho Park u32 burst = dep->endpoint.maxburst - 1; 452d2e9a13a388304bc2a7b25a6c34c6e2ab1540a5dChanho Park 453d2e9a13a388304bc2a7b25a6c34c6e2ab1540a5dChanho Park params.param0 |= DWC3_DEPCFG_BURST_SIZE(burst); 454d2e9a13a388304bc2a7b25a6c34c6e2ab1540a5dChanho Park } 45572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 4564b345c9a3c7452340fb477868d8db475f05978b1Felipe Balbi if (ignore) 4574b345c9a3c7452340fb477868d8db475f05978b1Felipe Balbi params.param0 |= DWC3_DEPCFG_IGN_SEQ_NUM; 4584b345c9a3c7452340fb477868d8db475f05978b1Felipe Balbi 459dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param1 = DWC3_DEPCFG_XFER_COMPLETE_EN 460dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi | DWC3_DEPCFG_XFER_NOT_READY_EN; 46172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 46218b7ede5f7ee2092aedcb578d3ac30bd5d4fc23cFelipe Balbi if (usb_ss_max_streams(comp_desc) && usb_endpoint_xfer_bulk(desc)) { 463dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param1 |= DWC3_DEPCFG_STREAM_CAPABLE 464dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi | DWC3_DEPCFG_STREAM_EVENT_EN; 465879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dep->stream_capable = true; 466879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi } 467879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi 46872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (usb_endpoint_xfer_isoc(desc)) 469dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param1 |= DWC3_DEPCFG_XFER_IN_PROGRESS_EN; 47072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 47172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 47272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We are doing 1:1 mapping for endpoints, meaning 47372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Physical Endpoints 2 maps to Logical Endpoint 2 and 47472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * so on. We consider the direction bit as part of the physical 47572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * endpoint number. So USB endpoint 0x81 is 0x03. 47672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 477dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param1 |= DWC3_DEPCFG_EP_NUMBER(dep->number); 47872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 47972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 48072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We must use the lower 16 TX FIFOs even though 48172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * HW might have more 48272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 48372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->direction) 484dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param0 |= DWC3_DEPCFG_FIFO_NUMBER(dep->number >> 1); 48572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 48672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (desc->bInterval) { 487dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param1 |= DWC3_DEPCFG_BINTERVAL_M1(desc->bInterval - 1); 48872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->interval = 1 << (desc->bInterval - 1); 48972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 49072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 49172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return dwc3_send_gadget_ep_cmd(dwc, dep->number, 49272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEPCMD_SETEPCONFIG, ¶ms); 49372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 49472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 49572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_set_xfer_resource(struct dwc3 *dwc, struct dwc3_ep *dep) 49672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 49772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 49872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 49972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0x00, sizeof(params)); 50072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 501dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param0 = DWC3_DEPXFERCFG_NUM_XFER_RES(1); 50272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 50372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return dwc3_send_gadget_ep_cmd(dwc, dep->number, 50472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEPCMD_SETTRANSFRESOURCE, ¶ms); 50572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 50672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 50772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/** 50872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * __dwc3_gadget_ep_enable - Initializes a HW endpoint 50972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * @dep: endpoint to be initialized 51072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * @desc: USB Endpoint Descriptor 51172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 51272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Caller should take care of locking 51372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 51472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int __dwc3_gadget_ep_enable(struct dwc3_ep *dep, 515c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi const struct usb_endpoint_descriptor *desc, 5164b345c9a3c7452340fb477868d8db475f05978b1Felipe Balbi const struct usb_ss_ep_comp_descriptor *comp_desc, 5174b345c9a3c7452340fb477868d8db475f05978b1Felipe Balbi bool ignore) 51872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 51972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 52072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 52172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret = -ENOMEM; 52272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 52372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) { 52472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_gadget_start_config(dwc, dep); 52572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 52672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 52772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 52872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 5294b345c9a3c7452340fb477868d8db475f05978b1Felipe Balbi ret = dwc3_gadget_set_ep_config(dwc, dep, desc, comp_desc, ignore); 53072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 53172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 53272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 53372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) { 534f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi struct dwc3_trb *trb_st_hw; 535f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi struct dwc3_trb *trb_link; 53672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 53772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_gadget_set_xfer_resource(dwc, dep); 53872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 53972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 54072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 54116e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz dep->endpoint.desc = desc; 542c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi dep->comp_desc = comp_desc; 54372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->type = usb_endpoint_type(desc); 54472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags |= DWC3_EP_ENABLED; 54572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 54672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DALEPENA); 54772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg |= DWC3_DALEPENA_EP(dep->number); 54872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DALEPENA, reg); 54972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 55072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!usb_endpoint_xfer_isoc(desc)) 55172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 55272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 55372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(&trb_link, 0, sizeof(trb_link)); 55472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 5551d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman /* Link TRB for ISOC. The HWO bit is never reset */ 55672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trb_st_hw = &dep->trb_pool[0]; 55772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 558f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb_link = &dep->trb_pool[DWC3_TRB_NUM - 1]; 55972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 560f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb_link->bpl = lower_32_bits(dwc3_trb_dma_offset(dep, trb_st_hw)); 561f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb_link->bph = upper_32_bits(dwc3_trb_dma_offset(dep, trb_st_hw)); 562f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb_link->ctrl |= DWC3_TRBCTL_LINK_TRB; 563f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb_link->ctrl |= DWC3_TRB_CTRL_HWO; 56472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 56572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 56672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 56772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 56872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 569624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewiorstatic void dwc3_stop_active_transfer(struct dwc3 *dwc, u32 epnum); 570624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewiorstatic void dwc3_remove_requests(struct dwc3 *dwc, struct dwc3_ep *dep) 57172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 57272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req; 57372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 574ea53b8828c50b7a5138a8931c41b2671682c86b5Felipe Balbi if (!list_empty(&dep->req_queued)) { 575624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior dwc3_stop_active_transfer(dwc, dep->number); 576624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior 57757911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand /* - giveback all requests to gadget driver */ 5781591633ed6c4c3994944f31ddb59bc072a2ed0caPratyush Anand while (!list_empty(&dep->req_queued)) { 5791591633ed6c4c3994944f31ddb59bc072a2ed0caPratyush Anand req = next_request(&dep->req_queued); 5801591633ed6c4c3994944f31ddb59bc072a2ed0caPratyush Anand 5811591633ed6c4c3994944f31ddb59bc072a2ed0caPratyush Anand dwc3_gadget_giveback(dep, req, -ESHUTDOWN); 5821591633ed6c4c3994944f31ddb59bc072a2ed0caPratyush Anand } 583ea53b8828c50b7a5138a8931c41b2671682c86b5Felipe Balbi } 584ea53b8828c50b7a5138a8931c41b2671682c86b5Felipe Balbi 58572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi while (!list_empty(&dep->request_list)) { 58672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req = next_request(&dep->request_list); 58772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 588624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior dwc3_gadget_giveback(dep, req, -ESHUTDOWN); 58972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 59072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 59172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 59272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/** 59372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * __dwc3_gadget_ep_disable - Disables a HW endpoint 59472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * @dep: the endpoint to disable 59572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 596624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior * This function also removes requests which are currently processed ny the 597624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior * hardware and those which are not yet scheduled. 598624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior * Caller should take care of locking. 59972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 60072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int __dwc3_gadget_ep_disable(struct dwc3_ep *dep) 60172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 60272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 60372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 60472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 605624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior dwc3_remove_requests(dwc, dep); 60672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 60772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DALEPENA); 60872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DALEPENA_EP(dep->number); 60972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DALEPENA, reg); 61072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 611879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dep->stream_capable = false; 612f9c56cdd3905c96c600456203637bd7ec8ec6383Ido Shayevitz dep->endpoint.desc = NULL; 613c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi dep->comp_desc = NULL; 61472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->type = 0; 615879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dep->flags = 0; 61672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 61772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 61872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 61972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 62072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 62172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 62272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep0_enable(struct usb_ep *ep, 62372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct usb_endpoint_descriptor *desc) 62472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 62572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EINVAL; 62672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 62772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 62872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep0_disable(struct usb_ep *ep) 62972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 63072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EINVAL; 63172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 63272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 63372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 63472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 63572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_enable(struct usb_ep *ep, 63672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct usb_endpoint_descriptor *desc) 63772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 63872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 63972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc; 64072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 64172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 64272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 64372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!ep || !desc || desc->bDescriptorType != USB_DT_ENDPOINT) { 64472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi pr_debug("dwc3: invalid parameters\n"); 64572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EINVAL; 64672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 64772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 64872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!desc->wMaxPacketSize) { 64972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi pr_debug("dwc3: missing wMaxPacketSize\n"); 65072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EINVAL; 65172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 65272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 65372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = to_dwc3_ep(ep); 65472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc = dep->dwc; 65572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 656c6f83f386c2f7987a344368e33e55840c12bd38fFelipe Balbi if (dep->flags & DWC3_EP_ENABLED) { 657c6f83f386c2f7987a344368e33e55840c12bd38fFelipe Balbi dev_WARN_ONCE(dwc->dev, true, "%s is already enabled\n", 658c6f83f386c2f7987a344368e33e55840c12bd38fFelipe Balbi dep->name); 659c6f83f386c2f7987a344368e33e55840c12bd38fFelipe Balbi return 0; 660c6f83f386c2f7987a344368e33e55840c12bd38fFelipe Balbi } 661c6f83f386c2f7987a344368e33e55840c12bd38fFelipe Balbi 66272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (usb_endpoint_type(desc)) { 66372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_ENDPOINT_XFER_CONTROL: 66427a78d6a283d6782438f72306746afe4bf44c215Anton Tikhomirov strlcat(dep->name, "-control", sizeof(dep->name)); 66572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 66672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_ENDPOINT_XFER_ISOC: 66727a78d6a283d6782438f72306746afe4bf44c215Anton Tikhomirov strlcat(dep->name, "-isoc", sizeof(dep->name)); 66872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 66972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_ENDPOINT_XFER_BULK: 67027a78d6a283d6782438f72306746afe4bf44c215Anton Tikhomirov strlcat(dep->name, "-bulk", sizeof(dep->name)); 67172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 67272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_ENDPOINT_XFER_INT: 67327a78d6a283d6782438f72306746afe4bf44c215Anton Tikhomirov strlcat(dep->name, "-int", sizeof(dep->name)); 67472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 67572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 67672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "invalid endpoint transfer type\n"); 67772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 67872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 67972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "Enabling %s\n", dep->name); 68072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 68172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 6824b345c9a3c7452340fb477868d8db475f05978b1Felipe Balbi ret = __dwc3_gadget_ep_enable(dep, desc, ep->comp_desc, false); 68372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 68472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 68572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 68672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 68772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 68872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_disable(struct usb_ep *ep) 68972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 69072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 69172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc; 69272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 69372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 69472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 69572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!ep) { 69672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi pr_debug("dwc3: invalid parameters\n"); 69772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EINVAL; 69872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 69972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 70072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = to_dwc3_ep(ep); 70172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc = dep->dwc; 70272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 70372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) { 70472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_WARN_ONCE(dwc->dev, true, "%s is already disabled\n", 70572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 70672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 70772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 70872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 70972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi snprintf(dep->name, sizeof(dep->name), "ep%d%s", 71072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->number >> 1, 71172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi (dep->number & 1) ? "in" : "out"); 71272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 71372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 71472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = __dwc3_gadget_ep_disable(dep); 71572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 71672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 71772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 71872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 71972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 72072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic struct usb_request *dwc3_gadget_ep_alloc_request(struct usb_ep *ep, 72172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi gfp_t gfp_flags) 72272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 72372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req; 72472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = to_dwc3_ep(ep); 72572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 72672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 72772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req = kzalloc(sizeof(*req), gfp_flags); 72872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!req) { 72972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "not enough memory\n"); 73072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return NULL; 73172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 73272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 73372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->epnum = dep->number; 73472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->dep = dep; 73572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 73672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return &req->request; 73772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 73872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 73972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_ep_free_request(struct usb_ep *ep, 74072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct usb_request *request) 74172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 74272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req = to_dwc3_request(request); 74372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 74472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi kfree(req); 74572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 74672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 747c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi/** 748c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi * dwc3_prepare_one_trb - setup one TRB from one request 749c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi * @dep: endpoint for which this request is prepared 750c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi * @req: dwc3_request pointer 751c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi */ 75268e823e24aea5227eaf20d6435485e733109d113Felipe Balbistatic void dwc3_prepare_one_trb(struct dwc3_ep *dep, 753eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi struct dwc3_request *req, dma_addr_t dma, 754e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand unsigned length, unsigned last, unsigned chain, unsigned node) 755c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi{ 756eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi struct dwc3 *dwc = dep->dwc; 757f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi struct dwc3_trb *trb; 758c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 759eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dev_vdbg(dwc->dev, "%s: req %p dma %08llx length %d%s%s\n", 760eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dep->name, req, (unsigned long long) dma, 761eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi length, last ? " last" : "", 762eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi chain ? " chain" : ""); 763eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi 764c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi /* Skip the LINK-TRB on ISOC */ 765915e202aeeb59e272992a6364c910aaef3073544Pratyush Anand if (((dep->free_slot & DWC3_TRB_MASK) == DWC3_TRB_NUM - 1) && 76616e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz usb_endpoint_xfer_isoc(dep->endpoint.desc)) 767915e202aeeb59e272992a6364c910aaef3073544Pratyush Anand dep->free_slot++; 768915e202aeeb59e272992a6364c910aaef3073544Pratyush Anand 769915e202aeeb59e272992a6364c910aaef3073544Pratyush Anand trb = &dep->trb_pool[dep->free_slot & DWC3_TRB_MASK]; 770c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 771eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (!req->trb) { 772eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dwc3_gadget_move_request_queued(req); 773f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi req->trb = trb; 774f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi req->trb_dma = dwc3_trb_dma_offset(dep, trb); 775e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand req->start_slot = dep->free_slot & DWC3_TRB_MASK; 776eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi } 777c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 778e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand dep->free_slot++; 779e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand 780f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->size = DWC3_TRB_SIZE_LENGTH(length); 781f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->bpl = lower_32_bits(dma); 782f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->bph = upper_32_bits(dma); 783c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 78416e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz switch (usb_endpoint_type(dep->endpoint.desc)) { 785c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi case USB_ENDPOINT_XFER_CONTROL: 786f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->ctrl = DWC3_TRBCTL_CONTROL_SETUP; 787c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi break; 788c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 789c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi case USB_ENDPOINT_XFER_ISOC: 790e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if (!node) 791e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand trb->ctrl = DWC3_TRBCTL_ISOCHRONOUS_FIRST; 792e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand else 793e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand trb->ctrl = DWC3_TRBCTL_ISOCHRONOUS; 794c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 795e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if (!req->request.no_interrupt && !chain) 796f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->ctrl |= DWC3_TRB_CTRL_IOC; 797c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi break; 798c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 799c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi case USB_ENDPOINT_XFER_BULK: 800c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi case USB_ENDPOINT_XFER_INT: 801f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->ctrl = DWC3_TRBCTL_NORMAL; 802c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi break; 803c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi default: 804c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi /* 805c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi * This is only possible with faulty memory because we 806c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi * checked it already :) 807c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi */ 808c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi BUG(); 809c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi } 810c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 81116e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if (usb_endpoint_xfer_isoc(dep->endpoint.desc)) { 812f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->ctrl |= DWC3_TRB_CTRL_ISP_IMI; 813f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->ctrl |= DWC3_TRB_CTRL_CSP; 814e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand } else if (last) { 815e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand trb->ctrl |= DWC3_TRB_CTRL_LST; 816f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi } 817c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 818e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if (chain) 819e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand trb->ctrl |= DWC3_TRB_CTRL_CHN; 820e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand 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; 891e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand last_one = false; 89272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 893eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (req->request.num_mapped_sgs > 0) { 894eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi struct usb_request *request = &req->request; 895eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi struct scatterlist *sg = request->sg; 896eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi struct scatterlist *s; 897eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi int i; 89872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 899eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi for_each_sg(sg, s, request->num_mapped_sgs, i) { 900eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi unsigned chain = true; 90172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 902eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi length = sg_dma_len(s); 903eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dma = sg_dma_address(s); 90472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 9051d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman if (i == (request->num_mapped_sgs - 1) || 9061d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman sg_is_last(s)) { 907e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if (list_is_last(&req->list, 908e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand &dep->request_list)) 909e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand last_one = true; 910eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi chain = false; 911eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi } 91272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 913eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi trbs_left--; 914eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (!trbs_left) 915eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi last_one = true; 91672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 917eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (last_one) 918eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi chain = false; 91972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 920eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dwc3_prepare_one_trb(dep, req, dma, length, 921e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand last_one, chain, i); 92272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 923eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (last_one) 924eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi break; 925eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi } 92672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 927eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dma = req->request.dma; 928eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi length = req->request.length; 929eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi trbs_left--; 93072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 931eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (!trbs_left) 932eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi last_one = 1; 933879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi 934eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi /* Is this the last request? */ 935eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (list_is_last(&req->list, &dep->request_list)) 936eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi last_one = 1; 93772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 938eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dwc3_prepare_one_trb(dep, req, dma, length, 939e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand last_one, false, 0); 94072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 941eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (last_one) 942eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi break; 94372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 94472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 94572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 94672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 94772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int __dwc3_gadget_kick_transfer(struct dwc3_ep *dep, u16 cmd_param, 94872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int start_new) 94972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 95072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 95172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req; 95272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 95372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 95472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 cmd; 95572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 95672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (start_new && (dep->flags & DWC3_EP_BUSY)) { 95772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s: endpoint busy\n", dep->name); 95872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EBUSY; 95972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 96072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags &= ~DWC3_EP_PENDING_REQUEST; 96172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 96272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 96372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * If we are getting here after a short-out-packet we don't enqueue any 96472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * new requests as we try to set the IOC bit only on the last request. 96572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 96672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (start_new) { 96772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (list_empty(&dep->req_queued)) 96872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_prepare_trbs(dep, start_new); 96972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 97072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* req points to the first request which will be sent */ 97172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req = next_request(&dep->req_queued); 97272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 97368e823e24aea5227eaf20d6435485e733109d113Felipe Balbi dwc3_prepare_trbs(dep, start_new); 97468e823e24aea5227eaf20d6435485e733109d113Felipe Balbi 97572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 9761d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * req points to the first request where HWO changed from 0 to 1 97772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 97868e823e24aea5227eaf20d6435485e733109d113Felipe Balbi req = next_request(&dep->req_queued); 97972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 98072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!req) { 98172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags |= DWC3_EP_PENDING_REQUEST; 98272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 98372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 98472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 98572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0, sizeof(params)); 98672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 9871877d6c9a57802d50a059cf2dacdba10168cece7Pratyush Anand if (start_new) { 9881877d6c9a57802d50a059cf2dacdba10168cece7Pratyush Anand params.param0 = upper_32_bits(req->trb_dma); 9891877d6c9a57802d50a059cf2dacdba10168cece7Pratyush Anand params.param1 = lower_32_bits(req->trb_dma); 99072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd = DWC3_DEPCMD_STARTTRANSFER; 9911877d6c9a57802d50a059cf2dacdba10168cece7Pratyush Anand } else { 99272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd = DWC3_DEPCMD_UPDATETRANSFER; 9931877d6c9a57802d50a059cf2dacdba10168cece7Pratyush Anand } 99472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 99572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd |= DWC3_DEPCMD_PARAM(cmd_param); 99672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, cmd, ¶ms); 99772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret < 0) { 99872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "failed to send STARTTRANSFER command\n"); 99972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 100072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 100172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * FIXME we need to iterate over the list of requests 100272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * here and stop, unmap, free and del each of the linked 10031d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * requests instead of what we do now. 100472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 10050fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi usb_gadget_unmap_request(&dwc->gadget, &req->request, 10060fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi req->direction); 100772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_del(&req->list); 100872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 100972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 101072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 101172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags |= DWC3_EP_BUSY; 101225b8ff68bf1d4954d4a9dcb4862c6b6a53cb09e2Felipe Balbi 1013f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman if (start_new) { 1014b4996a8631e80a2aaddb5c487ff6b9ad37315f70Felipe Balbi dep->resource_index = dwc3_gadget_ep_get_transfer_index(dwc, 1015f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman dep->number); 1016b4996a8631e80a2aaddb5c487ff6b9ad37315f70Felipe Balbi WARN_ON_ONCE(!dep->resource_index); 1017f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman } 101825b8ff68bf1d4954d4a9dcb4862c6b6a53cb09e2Felipe Balbi 101972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 102072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 102172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1022d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anandstatic void __dwc3_gadget_start_isoc(struct dwc3 *dwc, 1023d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand struct dwc3_ep *dep, u32 cur_uf) 1024d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand{ 1025d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand u32 uf; 1026d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand 1027d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand if (list_empty(&dep->request_list)) { 1028d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand dev_vdbg(dwc->dev, "ISOC ep %s run out for requests.\n", 1029d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand dep->name); 1030f4a53c55117b82e895ec98b1765c9d66940377fcPratyush Anand dep->flags |= DWC3_EP_PENDING_REQUEST; 1031d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand return; 1032d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand } 1033d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand 1034d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand /* 4 micro frames in the future */ 1035d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand uf = cur_uf + dep->interval * 4; 1036d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand 1037d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand __dwc3_gadget_kick_transfer(dep, uf, 1); 1038d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand} 1039d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand 1040d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anandstatic void dwc3_gadget_start_isoc(struct dwc3 *dwc, 1041d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand struct dwc3_ep *dep, const struct dwc3_event_depevt *event) 1042d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand{ 1043d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand u32 cur_uf, mask; 1044d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand 1045d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand mask = ~(dep->interval - 1); 1046d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand cur_uf = event->parameters & mask; 1047d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand 1048d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand __dwc3_gadget_start_isoc(dwc, dep, cur_uf); 1049d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand} 1050d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand 105172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int __dwc3_gadget_ep_queue(struct dwc3_ep *dep, struct dwc3_request *req) 105272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 10530fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi struct dwc3 *dwc = dep->dwc; 10540fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi int ret; 10550fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi 105672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.actual = 0; 105772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.status = -EINPROGRESS; 105872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->direction = dep->direction; 105972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->epnum = dep->number; 106072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 106172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 106272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We only add to our list of requests now and 106372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * start consuming the list once we get XferNotReady 106472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * IRQ. 106572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 106672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * That way, we avoid doing anything that we don't need 106772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * to do now and defer it until the point we receive a 106872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * particular token from the Host side. 106972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 107072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * This will also avoid Host cancelling URBs due to too 10711d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * many NAKs. 107272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 10730fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi ret = usb_gadget_map_request(&dwc->gadget, &req->request, 10740fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi dep->direction); 10750fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi if (ret) 10760fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi return ret; 10770fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi 107872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_add_tail(&req->list, &dep->request_list); 107972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 108072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 1081b511e5e76bf488cd3eec1048483a3898393a4dcaFelipe Balbi * There are a few special cases: 108272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 1083f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman * 1. XferNotReady with empty list of requests. We need to kick the 1084f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman * transfer here in that situation, otherwise we will be NAKing 1085f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman * forever. If we get XferNotReady before gadget driver has a 1086f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman * chance to queue a request, we will ACK the IRQ but won't be 1087f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman * able to receive the data until the next request is queued. 1088f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman * The following code is handling exactly that. 108972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 109072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 109172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->flags & DWC3_EP_PENDING_REQUEST) { 1092f4a53c55117b82e895ec98b1765c9d66940377fcPratyush Anand /* 1093f4a53c55117b82e895ec98b1765c9d66940377fcPratyush Anand * If xfernotready is already elapsed and it is a case 1094f4a53c55117b82e895ec98b1765c9d66940377fcPratyush Anand * of isoc transfer, then issue END TRANSFER, so that 1095f4a53c55117b82e895ec98b1765c9d66940377fcPratyush Anand * you can receive xfernotready again and can have 1096f4a53c55117b82e895ec98b1765c9d66940377fcPratyush Anand * notion of current microframe. 1097f4a53c55117b82e895ec98b1765c9d66940377fcPratyush Anand */ 1098f4a53c55117b82e895ec98b1765c9d66940377fcPratyush Anand if (usb_endpoint_xfer_isoc(dep->endpoint.desc)) { 1099cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand if (list_empty(&dep->req_queued)) { 1100cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand dwc3_stop_active_transfer(dwc, dep->number); 1101cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand dep->flags = DWC3_EP_ENABLED; 1102cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand } 1103f4a53c55117b82e895ec98b1765c9d66940377fcPratyush Anand return 0; 1104f4a53c55117b82e895ec98b1765c9d66940377fcPratyush Anand } 1105f4a53c55117b82e895ec98b1765c9d66940377fcPratyush Anand 1106b511e5e76bf488cd3eec1048483a3898393a4dcaFelipe Balbi ret = __dwc3_gadget_kick_transfer(dep, 0, true); 1107348e026fafe2501281db5fb7fed599b337cad358Moiz Sonasath if (ret && ret != -EBUSY) 1108b511e5e76bf488cd3eec1048483a3898393a4dcaFelipe Balbi dev_dbg(dwc->dev, "%s: failed to kick transfers\n", 1109b511e5e76bf488cd3eec1048483a3898393a4dcaFelipe Balbi dep->name); 111015f86bde29f0fdfb877d9c753547fa2e2f5ef1fePratyush Anand return ret; 1111b511e5e76bf488cd3eec1048483a3898393a4dcaFelipe Balbi } 111272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1113b511e5e76bf488cd3eec1048483a3898393a4dcaFelipe Balbi /* 1114b511e5e76bf488cd3eec1048483a3898393a4dcaFelipe Balbi * 2. XferInProgress on Isoc EP with an active transfer. We need to 1115b511e5e76bf488cd3eec1048483a3898393a4dcaFelipe Balbi * kick the transfer here after queuing a request, otherwise the 1116b511e5e76bf488cd3eec1048483a3898393a4dcaFelipe Balbi * core may not see the modified TRB(s). 1117b511e5e76bf488cd3eec1048483a3898393a4dcaFelipe Balbi */ 1118b511e5e76bf488cd3eec1048483a3898393a4dcaFelipe Balbi if (usb_endpoint_xfer_isoc(dep->endpoint.desc) && 111979c9046ec52b5aaa9f055e3d928d676dd37a6f9dPratyush Anand (dep->flags & DWC3_EP_BUSY) && 112079c9046ec52b5aaa9f055e3d928d676dd37a6f9dPratyush Anand !(dep->flags & DWC3_EP_MISSED_ISOC)) { 1121b4996a8631e80a2aaddb5c487ff6b9ad37315f70Felipe Balbi WARN_ON_ONCE(!dep->resource_index); 1122b4996a8631e80a2aaddb5c487ff6b9ad37315f70Felipe Balbi ret = __dwc3_gadget_kick_transfer(dep, dep->resource_index, 1123b511e5e76bf488cd3eec1048483a3898393a4dcaFelipe Balbi false); 1124348e026fafe2501281db5fb7fed599b337cad358Moiz Sonasath if (ret && ret != -EBUSY) 112572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "%s: failed to kick transfers\n", 112672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 112715f86bde29f0fdfb877d9c753547fa2e2f5ef1fePratyush Anand return ret; 1128a092532483e3200a53c8b1170b3988cc668c07efFelipe Balbi } 112972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 113072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 113172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 113272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 113372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_queue(struct usb_ep *ep, struct usb_request *request, 113472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi gfp_t gfp_flags) 113572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 113672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req = to_dwc3_request(request); 113772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = to_dwc3_ep(ep); 113872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 113972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 114072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 114172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 114272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 114372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 114416e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if (!dep->endpoint.desc) { 114572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "trying to queue request %p to disabled %s\n", 114672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi request, ep->name); 114772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -ESHUTDOWN; 114872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 114972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 115072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "queing request %p to %s length %d\n", 115172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi request, ep->name, request->length); 115272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 115372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 115472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = __dwc3_gadget_ep_queue(dep, req); 115572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 115672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 115772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 115872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 115972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 116072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_dequeue(struct usb_ep *ep, 116172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct usb_request *request) 116272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 116372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req = to_dwc3_request(request); 116472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *r = NULL; 116572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 116672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = to_dwc3_ep(ep); 116772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 116872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 116972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 117072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret = 0; 117172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 117272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 117372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 117472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_for_each_entry(r, &dep->request_list, list) { 117572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (r == req) 117672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 117772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 117872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 117972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (r != req) { 118072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_for_each_entry(r, &dep->req_queued, list) { 118172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (r == req) 118272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 118372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 118472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (r == req) { 118572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* wait until it is processed */ 118672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_stop_active_transfer(dwc, dep->number); 1187e8d4e8be860d935099ffcf695dcd29b55ae50b36Pratyush Anand goto out1; 118872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 118972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "request %p was not queued to %s\n", 119072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi request, ep->name); 119172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EINVAL; 119272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto out0; 119372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 119472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1195e8d4e8be860d935099ffcf695dcd29b55ae50b36Pratyush Anandout1: 119672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* giveback the request */ 119772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_giveback(dep, req, -ECONNRESET); 119872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 119972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiout0: 120072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 120172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 120272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 120372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 120472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 120572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiint __dwc3_gadget_ep_set_halt(struct dwc3_ep *dep, int value) 120672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 120772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 120872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 120972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 121072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 121172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0x00, sizeof(params)); 121272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 121372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (value) { 121472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, 121572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEPCMD_SETSTALL, ¶ms); 121672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 121772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to %s STALL on %s\n", 121872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi value ? "set" : "clear", 121972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 122072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi else 122172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags |= DWC3_EP_STALL; 122272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 12235275455a6e6ae6b57303834b0afd267bb9657ffcPaul Zimmerman if (dep->flags & DWC3_EP_WEDGE) 12245275455a6e6ae6b57303834b0afd267bb9657ffcPaul Zimmerman return 0; 12255275455a6e6ae6b57303834b0afd267bb9657ffcPaul Zimmerman 122672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, 122772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEPCMD_CLEARSTALL, ¶ms); 122872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 122972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to %s STALL on %s\n", 123072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi value ? "set" : "clear", 123172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 123272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi else 123372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags &= ~DWC3_EP_STALL; 123472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 12355275455a6e6ae6b57303834b0afd267bb9657ffcPaul Zimmerman 123672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 123772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 123872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 123972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_set_halt(struct usb_ep *ep, int value) 124072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 124172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = to_dwc3_ep(ep); 124272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 124372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 124472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 124572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 124672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 124772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 124872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 124972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 125016e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if (usb_endpoint_xfer_isoc(dep->endpoint.desc)) { 125172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "%s is of Isochronous type\n", dep->name); 125272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EINVAL; 125372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto out; 125472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 125572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 125672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = __dwc3_gadget_ep_set_halt(dep, value); 125772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiout: 125872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 125972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 126072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 126172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 126272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 126372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_set_wedge(struct usb_ep *ep) 126472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 126572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = to_dwc3_ep(ep); 1266249a456930cd2df29d085fb738b0e8f4bc1680cfPaul Zimmerman struct dwc3 *dwc = dep->dwc; 1267249a456930cd2df29d085fb738b0e8f4bc1680cfPaul Zimmerman unsigned long flags; 126872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1269249a456930cd2df29d085fb738b0e8f4bc1680cfPaul Zimmerman spin_lock_irqsave(&dwc->lock, flags); 127072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags |= DWC3_EP_WEDGE; 1271249a456930cd2df29d085fb738b0e8f4bc1680cfPaul Zimmerman spin_unlock_irqrestore(&dwc->lock, flags); 127272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 127308f0d96670c53898b4154e7945e77cdd966003f7Pratyush Anand if (dep->number == 0 || dep->number == 1) 127408f0d96670c53898b4154e7945e77cdd966003f7Pratyush Anand return dwc3_gadget_ep0_set_halt(ep, 1); 127508f0d96670c53898b4154e7945e77cdd966003f7Pratyush Anand else 127608f0d96670c53898b4154e7945e77cdd966003f7Pratyush Anand return dwc3_gadget_ep_set_halt(ep, 1); 127772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 127872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 127972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 128072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 128172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic struct usb_endpoint_descriptor dwc3_gadget_ep0_desc = { 128272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .bLength = USB_DT_ENDPOINT_SIZE, 128372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .bDescriptorType = USB_DT_ENDPOINT, 128472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .bmAttributes = USB_ENDPOINT_XFER_CONTROL, 128572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi}; 128672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 128772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic const struct usb_ep_ops dwc3_gadget_ep0_ops = { 128872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .enable = dwc3_gadget_ep0_enable, 128972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .disable = dwc3_gadget_ep0_disable, 129072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .alloc_request = dwc3_gadget_ep_alloc_request, 129172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .free_request = dwc3_gadget_ep_free_request, 129272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .queue = dwc3_gadget_ep0_queue, 129372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .dequeue = dwc3_gadget_ep_dequeue, 129408f0d96670c53898b4154e7945e77cdd966003f7Pratyush Anand .set_halt = dwc3_gadget_ep0_set_halt, 129572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .set_wedge = dwc3_gadget_ep_set_wedge, 129672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi}; 129772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 129872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic const struct usb_ep_ops dwc3_gadget_ep_ops = { 129972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .enable = dwc3_gadget_ep_enable, 130072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .disable = dwc3_gadget_ep_disable, 130172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .alloc_request = dwc3_gadget_ep_alloc_request, 130272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .free_request = dwc3_gadget_ep_free_request, 130372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .queue = dwc3_gadget_ep_queue, 130472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .dequeue = dwc3_gadget_ep_dequeue, 130572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .set_halt = dwc3_gadget_ep_set_halt, 130672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .set_wedge = dwc3_gadget_ep_set_wedge, 130772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi}; 130872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 130972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 131072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 131172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_get_frame(struct usb_gadget *g) 131272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 131372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 131472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 131572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 131672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 131772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return DWC3_DSTS_SOFFN(reg); 131872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 131972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 132072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_wakeup(struct usb_gadget *g) 132172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 132272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 132372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 132472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long timeout; 132572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 132672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 132772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 132872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 132972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret = 0; 133072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 133172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 link_state; 133272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 speed; 133372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 133472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 133572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 133672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 133772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * According to the Databook Remote wakeup request should 133872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * be issued only when the device is in early suspend state. 133972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 134072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We can check that via USB Link State bits in DSTS register. 134172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 134272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 134372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 134472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi speed = reg & DWC3_DSTS_CONNECTSPD; 134572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (speed == DWC3_DSTS_SUPERSPEED) { 134672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "no wakeup on SuperSpeed\n"); 134772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EINVAL; 134872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto out; 134972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 135072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 135172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi link_state = DWC3_DSTS_USBLNKST(reg); 135272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 135372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (link_state) { 135472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_LINK_STATE_RX_DET: /* in HS, means Early Suspend */ 135572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_LINK_STATE_U3: /* in HS, means SUSPEND */ 135672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 135772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 135872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "can't wakeup from link state %d\n", 135972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi link_state); 136072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EINVAL; 136172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto out; 136272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 136372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 13648598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi ret = dwc3_gadget_set_link_state(dwc, DWC3_LINK_STATE_RECOV); 13658598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi if (ret < 0) { 13668598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi dev_err(dwc->dev, "failed to put link in Recovery\n"); 13678598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi goto out; 13688598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi } 136972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1370802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman /* Recent versions do this automatically */ 1371802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman if (dwc->revision < DWC3_REVISION_194A) { 1372802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman /* write zeroes to Link Change Request */ 1373fcc023c726b5879d8f3f0f0f48c45d09055272c4Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 1374802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman reg &= ~DWC3_DCTL_ULSTCHNGREQ_MASK; 1375802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman dwc3_writel(dwc->regs, DWC3_DCTL, reg); 1376802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman } 137772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 13781d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman /* poll until Link State changes to ON */ 137972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi timeout = jiffies + msecs_to_jiffies(100); 138072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 13811d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman while (!time_after(jiffies, timeout)) { 138272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 138372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 138472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* in HS, means ON */ 138572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (DWC3_DSTS_USBLNKST(reg) == DWC3_LINK_STATE_U0) 138672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 138772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 138872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 138972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (DWC3_DSTS_USBLNKST(reg) != DWC3_LINK_STATE_U0) { 139072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to send remote wakeup\n"); 139172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EINVAL; 139272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 139372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 139472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiout: 139572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 139672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 139772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 139872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 139972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 140072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_set_selfpowered(struct usb_gadget *g, 140172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int is_selfpowered) 140272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 140372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 1404249a456930cd2df29d085fb738b0e8f4bc1680cfPaul Zimmerman unsigned long flags; 140572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1406249a456930cd2df29d085fb738b0e8f4bc1680cfPaul Zimmerman spin_lock_irqsave(&dwc->lock, flags); 140772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->is_selfpowered = !!is_selfpowered; 1408249a456930cd2df29d085fb738b0e8f4bc1680cfPaul Zimmerman spin_unlock_irqrestore(&dwc->lock, flags); 140972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 141072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 141172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 141272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 14136f17f74b3d8345663f5fcfd834145685110075bdPratyush Anandstatic int dwc3_gadget_run_stop(struct dwc3 *dwc, int is_on) 141472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 141572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 141661d58242f634642de42d6a4098913b7254a65053Sebastian Andrzej Siewior u32 timeout = 500; 141772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 141872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 14198db7ed15f2557e26371e4b2d98fee290d992b715Felipe Balbi if (is_on) { 1420802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman if (dwc->revision <= DWC3_REVISION_187A) { 1421802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman reg &= ~DWC3_DCTL_TRGTULST_MASK; 1422802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman reg |= DWC3_DCTL_TRGTULST_RX_DET; 1423802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman } 1424802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman 1425802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman if (dwc->revision >= DWC3_REVISION_194A) 1426802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman reg &= ~DWC3_DCTL_KEEP_CONNECT; 1427802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman reg |= DWC3_DCTL_RUN_STOP; 14288db7ed15f2557e26371e4b2d98fee290d992b715Felipe Balbi } else { 142972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DCTL_RUN_STOP; 14308db7ed15f2557e26371e4b2d98fee290d992b715Felipe Balbi } 143172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 143272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 143372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 143472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi do { 143572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 143672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (is_on) { 143772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(reg & DWC3_DSTS_DEVCTRLHLT)) 143872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 143972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 144072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (reg & DWC3_DSTS_DEVCTRLHLT) 144172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 144272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 144372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi timeout--; 144472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!timeout) 14456f17f74b3d8345663f5fcfd834145685110075bdPratyush Anand return -ETIMEDOUT; 144661d58242f634642de42d6a4098913b7254a65053Sebastian Andrzej Siewior udelay(1); 144772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } while (1); 144872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 144972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "gadget %s data soft-%s\n", 145072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver 145172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ? dwc->gadget_driver->function : "no-function", 145272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi is_on ? "connect" : "disconnect"); 14536f17f74b3d8345663f5fcfd834145685110075bdPratyush Anand 14546f17f74b3d8345663f5fcfd834145685110075bdPratyush Anand return 0; 145572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 145672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 145772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_pullup(struct usb_gadget *g, int is_on) 145872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 145972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 146072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 14616f17f74b3d8345663f5fcfd834145685110075bdPratyush Anand int ret; 146272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 146372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi is_on = !!is_on; 146472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 146572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 14666f17f74b3d8345663f5fcfd834145685110075bdPratyush Anand ret = dwc3_gadget_run_stop(dwc, is_on); 146772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 146872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 14696f17f74b3d8345663f5fcfd834145685110075bdPratyush Anand return ret; 147072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 147172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 14728698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbistatic void dwc3_gadget_enable_irq(struct dwc3 *dwc) 14738698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi{ 14748698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi u32 reg; 14758698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi 14768698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi /* Enable all but Start and End of Frame IRQs */ 14778698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi reg = (DWC3_DEVTEN_VNDRDEVTSTRCVEDEN | 14788698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi DWC3_DEVTEN_EVNTOVERFLOWEN | 14798698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi DWC3_DEVTEN_CMDCMPLTEN | 14808698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi DWC3_DEVTEN_ERRTICERREN | 14818698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi DWC3_DEVTEN_WKUPEVTEN | 14828698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi DWC3_DEVTEN_ULSTCNGEN | 14838698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi DWC3_DEVTEN_CONNECTDONEEN | 14848698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi DWC3_DEVTEN_USBRSTEN | 14858698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi DWC3_DEVTEN_DISCONNEVTEN); 14868698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi 14878698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEVTEN, reg); 14888698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi} 14898698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi 14908698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbistatic void dwc3_gadget_disable_irq(struct dwc3 *dwc) 14918698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi{ 14928698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi /* mask all interrupts */ 14938698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEVTEN, 0x00); 14948698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi} 14958698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi 14968698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbistatic irqreturn_t dwc3_interrupt(int irq, void *_dwc); 14978698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi 149872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_start(struct usb_gadget *g, 149972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct usb_gadget_driver *driver) 150072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 150172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 150272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 150372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 150472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret = 0; 15058698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi int irq; 150672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 150772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 150872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 150972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 151072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dwc->gadget_driver) { 151172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "%s is already bound to %s\n", 151272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.name, 151372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver->driver.name); 151472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EBUSY; 151572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto err0; 151672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 151772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 151872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver = driver; 151972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.dev.driver = &driver->driver; 152072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 152172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCFG); 152272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~(DWC3_DCFG_SPEED_MASK); 152307e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi 152407e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi /** 152507e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * WORKAROUND: DWC3 revision < 2.20a have an issue 152607e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * which would cause metastability state on Run/Stop 152707e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * bit if we try to force the IP to USB2-only mode. 152807e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * 152907e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * Because of that, we cannot configure the IP to any 153007e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * speed other than the SuperSpeed 153107e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * 153207e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * Refers to: 153307e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * 153407e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * STAR#9000525659: Clock Domain Crossing on DCTL in 153507e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * USB 2.0 Mode 153607e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi */ 153707e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi if (dwc->revision < DWC3_REVISION_220A) 153807e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi reg |= DWC3_DCFG_SUPERSPEED; 153907e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi else 154007e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi reg |= dwc->maximum_speed; 154172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCFG, reg); 154272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1543b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman dwc->start_config_issued = false; 1544b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman 154572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* Start with SuperSpeed Default */ 154672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(512); 154772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 154872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[0]; 15494b345c9a3c7452340fb477868d8db475f05978b1Felipe Balbi ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL, false); 155072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 155172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to enable %s\n", dep->name); 155272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto err0; 155372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 155472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 155572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[1]; 15564b345c9a3c7452340fb477868d8db475f05978b1Felipe Balbi ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL, false); 155772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 155872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to enable %s\n", dep->name); 155972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto err1; 156072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 156172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 156272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* begin to receive SETUP packets */ 1563c7fcdeb2627c46b7ec3f0bcb2054b10405f9a70eFelipe Balbi dwc->ep0state = EP0_SETUP_PHASE; 156472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_ep0_out_start(dwc); 156572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 15668698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi irq = platform_get_irq(to_platform_device(dwc->dev), 0); 15678698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi ret = request_irq(irq, dwc3_interrupt, IRQF_SHARED, 15688698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi "dwc3", dwc); 15698698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi if (ret) { 15708698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi dev_err(dwc->dev, "failed to request irq #%d --> %d\n", 15718698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi irq, ret); 15728698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi goto err1; 15738698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi } 15748698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi 15758698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi dwc3_gadget_enable_irq(dwc); 15768698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi 157772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 157872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 157972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 158072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 158172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbierr1: 158272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi __dwc3_gadget_ep_disable(dwc->eps[0]); 158372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 158472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbierr0: 158572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 158672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 158772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 158872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 158972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 159072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_stop(struct usb_gadget *g, 159172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct usb_gadget_driver *driver) 159272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 159372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 159472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 15958698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi int irq; 159672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 159772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 159872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 15998698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi dwc3_gadget_disable_irq(dwc); 16008698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi irq = platform_get_irq(to_platform_device(dwc->dev), 0); 16018698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi free_irq(irq, dwc); 16028698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi 160372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi __dwc3_gadget_ep_disable(dwc->eps[0]); 160472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi __dwc3_gadget_ep_disable(dwc->eps[1]); 160572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 160672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver = NULL; 160772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.dev.driver = NULL; 160872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 160972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 161072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 161172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 161272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 1613802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman 161472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic const struct usb_gadget_ops dwc3_gadget_ops = { 161572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .get_frame = dwc3_gadget_get_frame, 161672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .wakeup = dwc3_gadget_wakeup, 161772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .set_selfpowered = dwc3_gadget_set_selfpowered, 161872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .pullup = dwc3_gadget_pullup, 161972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .udc_start = dwc3_gadget_start, 162072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .udc_stop = dwc3_gadget_stop, 162172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi}; 162272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 162372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 162472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 162541ac7b3ab7fe1d6175839947a877fdf95cbd2211Bill Pembertonstatic int dwc3_gadget_init_endpoints(struct dwc3 *dwc) 162672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 162772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 162872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 epnum; 162972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 163072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi INIT_LIST_HEAD(&dwc->gadget.ep_list); 163172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 163272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi for (epnum = 0; epnum < DWC3_ENDPOINTS_NUM; epnum++) { 163372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = kzalloc(sizeof(*dep), GFP_KERNEL); 163472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dep) { 163572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "can't allocate endpoint %d\n", 163672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi epnum); 163772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -ENOMEM; 163872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 163972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 164072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->dwc = dwc; 164172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->number = epnum; 164272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->eps[epnum] = dep; 164372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 164472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi snprintf(dep->name, sizeof(dep->name), "ep%d%s", epnum >> 1, 164572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi (epnum & 1) ? "in" : "out"); 164672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->endpoint.name = dep->name; 164772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->direction = (epnum & 1); 164872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 164972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (epnum == 0 || epnum == 1) { 165072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->endpoint.maxpacket = 512; 16516048e4c69d80600baba35856651056860d5d8f5aPratyush Anand dep->endpoint.maxburst = 1; 165272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->endpoint.ops = &dwc3_gadget_ep0_ops; 165372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!epnum) 165472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ep0 = &dep->endpoint; 165572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 165672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 165772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 165872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->endpoint.maxpacket = 1024; 165912d36c16bde3ee0643d705caa87723de536dbe49Sebastian Andrzej Siewior dep->endpoint.max_streams = 15; 166072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->endpoint.ops = &dwc3_gadget_ep_ops; 166172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_add_tail(&dep->endpoint.ep_list, 166272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi &dwc->gadget.ep_list); 166372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 166472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_alloc_trb_pool(dep); 166525b8ff68bf1d4954d4a9dcb4862c6b6a53cb09e2Felipe Balbi if (ret) 166672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 166772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 166825b8ff68bf1d4954d4a9dcb4862c6b6a53cb09e2Felipe Balbi 166972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi INIT_LIST_HEAD(&dep->request_list); 167072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi INIT_LIST_HEAD(&dep->req_queued); 167172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 167272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 167372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 167472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 167572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 167672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_free_endpoints(struct dwc3 *dwc) 167772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 167872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 167972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 epnum; 168072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 168172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi for (epnum = 0; epnum < DWC3_ENDPOINTS_NUM; epnum++) { 168272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[epnum]; 168372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_free_trb_pool(dep); 168472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 168572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (epnum != 0 && epnum != 1) 168672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_del(&dep->endpoint.ep_list); 168772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 168872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi kfree(dep); 168972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 169072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 169172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 169272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_release(struct device *dev) 169372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 169472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dev, "%s\n", __func__); 169572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 169672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 169772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 1698e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anandstatic int __dwc3_cleanup_done_trbs(struct dwc3 *dwc, struct dwc3_ep *dep, 1699e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand struct dwc3_request *req, struct dwc3_trb *trb, 170072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct dwc3_event_depevt *event, int status) 170172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 170272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned int count; 170372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned int s_pkt = 0; 1704d6d6ec7b8854ab62f7f3907656d5d29eb47532e7Pratyush Anand unsigned int trb_status; 170572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1706e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if ((trb->ctrl & DWC3_TRB_CTRL_HWO) && status != -ESHUTDOWN) 1707e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand /* 1708e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * We continue despite the error. There is not much we 1709e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * can do. If we don't clean it up we loop forever. If 1710e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * we skip the TRB then it gets overwritten after a 1711e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * while since we use them in a ring buffer. A BUG() 1712e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * would help. Lets hope that if this occurs, someone 1713e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * fixes the root cause instead of looking away :) 1714e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand */ 1715e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand dev_err(dwc->dev, "%s's TRB (%p) still owned by HW\n", 1716e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand dep->name, trb); 1717e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand count = trb->size & DWC3_TRB_SIZE_MASK; 1718e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand 1719e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if (dep->direction) { 1720e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if (count) { 1721e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand trb_status = DWC3_TRB_SIZE_TRBSTS(trb->size); 1722e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if (trb_status == DWC3_TRBSTS_MISSED_ISOC) { 1723e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand dev_dbg(dwc->dev, "incomplete IN transfer %s\n", 1724e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand dep->name); 1725e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand /* 1726e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * If missed isoc occurred and there is 1727e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * no request queued then issue END 1728e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * TRANSFER, so that core generates 1729e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * next xfernotready and we will issue 1730e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * a fresh START TRANSFER. 1731e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * If there are still queued request 1732e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * then wait, do not issue either END 1733e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * or UPDATE TRANSFER, just attach next 1734e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * request in request_list during 1735e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * giveback.If any future queued request 1736e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * is successfully transferred then we 1737e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * will issue UPDATE TRANSFER for all 1738e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * request in the request_list. 1739e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand */ 1740e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand dep->flags |= DWC3_EP_MISSED_ISOC; 1741e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand } else { 1742e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand dev_err(dwc->dev, "incomplete IN transfer %s\n", 1743e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand dep->name); 1744e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand status = -ECONNRESET; 1745e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand } 1746e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand } else { 1747e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand dep->flags &= ~DWC3_EP_MISSED_ISOC; 1748e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand } 1749e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand } else { 1750e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if (count && (event->status & DEPEVT_STATUS_SHORT)) 1751e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand s_pkt = 1; 1752e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand } 1753e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand 1754e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand /* 1755e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * We assume here we will always receive the entire data block 1756e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * which we should receive. Meaning, if we program RX to 1757e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * receive 4K but we receive only 2K, we assume that's all we 1758e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * should receive and we simply bounce the request back to the 1759e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand * gadget driver for further processing. 1760e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand */ 1761e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand req->request.actual += req->request.length - count; 1762e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if (s_pkt) 1763e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand return 1; 1764e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if ((event->status & DEPEVT_STATUS_LST) && 1765e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand (trb->ctrl & (DWC3_TRB_CTRL_LST | 1766e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand DWC3_TRB_CTRL_HWO))) 1767e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand return 1; 1768e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if ((event->status & DEPEVT_STATUS_IOC) && 1769e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand (trb->ctrl & DWC3_TRB_CTRL_IOC)) 1770e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand return 1; 1771e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand return 0; 1772e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand} 1773e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand 1774e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anandstatic int dwc3_cleanup_done_reqs(struct dwc3 *dwc, struct dwc3_ep *dep, 1775e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand const struct dwc3_event_depevt *event, int status) 1776e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand{ 1777e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand struct dwc3_request *req; 1778e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand struct dwc3_trb *trb; 1779e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand unsigned int slot; 1780e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand unsigned int i; 1781e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand int ret; 1782e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand 178372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi do { 178472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req = next_request(&dep->req_queued); 1785d39ee7be2aaf0a53d7b5f43c13571bac95f7cc0cSebastian Andrzej Siewior if (!req) { 1786d39ee7be2aaf0a53d7b5f43c13571bac95f7cc0cSebastian Andrzej Siewior WARN_ON_ONCE(1); 1787d39ee7be2aaf0a53d7b5f43c13571bac95f7cc0cSebastian Andrzej Siewior return 1; 1788d39ee7be2aaf0a53d7b5f43c13571bac95f7cc0cSebastian Andrzej Siewior } 1789e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand i = 0; 1790e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand do { 1791e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand slot = req->start_slot + i; 1792e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if ((slot == DWC3_TRB_NUM - 1) && 1793e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand usb_endpoint_xfer_isoc(dep->endpoint.desc)) 1794e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand slot++; 1795e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand slot %= DWC3_TRB_NUM; 1796e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand trb = &dep->trb_pool[slot]; 179772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1798e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand ret = __dwc3_cleanup_done_trbs(dwc, dep, req, trb, 1799e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand event, status); 1800e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if (ret) 1801e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand break; 1802e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand }while (++i < req->request.num_mapped_sgs); 180372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 180472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_giveback(dep, req, status); 1805e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand 1806e5ba5ec833aa4a76980b512d6a6779643516b850Pratyush Anand if (ret) 180772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 180872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } while (1); 180972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1810cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand if (usb_endpoint_xfer_isoc(dep->endpoint.desc) && 1811cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand list_empty(&dep->req_queued)) { 1812cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand if (list_empty(&dep->request_list)) { 1813cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand /* 1814cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand * If there is no entry in request list then do 1815cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand * not issue END TRANSFER now. Just set PENDING 1816cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand * flag, so that END TRANSFER is issued when an 1817cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand * entry is added into request list. 1818cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand */ 1819cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand dep->flags = DWC3_EP_PENDING_REQUEST; 1820cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand } else { 1821cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand dwc3_stop_active_transfer(dwc, dep->number); 1822cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand dep->flags = DWC3_EP_ENABLED; 1823cdc359dd87ab6c39a67dab724fd0b61c16e6f08bPratyush Anand } 18247efea86c2868b8fd9df65e589e33aebe498ce21dPratyush Anand return 1; 18257efea86c2868b8fd9df65e589e33aebe498ce21dPratyush Anand } 18267efea86c2868b8fd9df65e589e33aebe498ce21dPratyush Anand 1827f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi if ((event->status & DEPEVT_STATUS_IOC) && 1828f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi (trb->ctrl & DWC3_TRB_CTRL_IOC)) 182972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 183072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 1; 183172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 183272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 183372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_endpoint_transfer_complete(struct dwc3 *dwc, 183472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep, const struct dwc3_event_depevt *event, 183572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int start_new) 183672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 183772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned status = 0; 183872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int clean_busy; 183972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 184072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (event->status & DEPEVT_STATUS_BUSERR) 184172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi status = -ECONNRESET; 184272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 18431d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman clean_busy = dwc3_cleanup_done_reqs(dwc, dep, event, status); 1844c2df85ca31645ed3c68c56bd30a3673e034224f1Paul Zimmerman if (clean_busy) 184572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags &= ~DWC3_EP_BUSY; 1846fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1847fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi /* 1848fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * WORKAROUND: This is the 2nd half of U1/U2 -> U0 workaround. 1849fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * See dwc3_gadget_linksts_change_interrupt() for 1st half. 1850fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi */ 1851fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi if (dwc->revision < DWC3_REVISION_183A) { 1852fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi u32 reg; 1853fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi int i; 1854fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1855fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi for (i = 0; i < DWC3_ENDPOINTS_NUM; i++) { 1856348e026fafe2501281db5fb7fed599b337cad358Moiz Sonasath dep = dwc->eps[i]; 1857fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1858fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) 1859fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi continue; 1860fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1861fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi if (!list_empty(&dep->req_queued)) 1862fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi return; 1863fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi } 1864fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1865fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 1866fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi reg |= dwc->u1u2; 1867fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 1868fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1869fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi dwc->u1u2 = 0; 1870fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi } 187172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 187272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 187372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_endpoint_interrupt(struct dwc3 *dwc, 187472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct dwc3_event_depevt *event) 187572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 187672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 187772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 epnum = event->endpoint_number; 187872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 187972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[epnum]; 188072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 18813336abb5b608300550136ddab7a7101b30d45fa7Felipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) 18823336abb5b608300550136ddab7a7101b30d45fa7Felipe Balbi return; 18833336abb5b608300550136ddab7a7101b30d45fa7Felipe Balbi 188472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s: %s\n", dep->name, 188572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_ep_event_string(event->endpoint_event)); 188672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 188772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (epnum == 0 || epnum == 1) { 188872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_ep0_interrupt(dwc, event); 188972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 189072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 189172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 189272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (event->endpoint_event) { 189372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPEVT_XFERCOMPLETE: 1894b4996a8631e80a2aaddb5c487ff6b9ad37315f70Felipe Balbi dep->resource_index = 0; 1895c2df85ca31645ed3c68c56bd30a3673e034224f1Paul Zimmerman 189616e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if (usb_endpoint_xfer_isoc(dep->endpoint.desc)) { 189772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "%s is an Isochronous endpoint\n", 189872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 189972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 190072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 190172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 190272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_endpoint_transfer_complete(dwc, dep, event, 1); 190372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 190472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPEVT_XFERINPROGRESS: 190516e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if (!usb_endpoint_xfer_isoc(dep->endpoint.desc)) { 190672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "%s is not an Isochronous endpoint\n", 190772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 190872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 190972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 191072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 191172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_endpoint_transfer_complete(dwc, dep, event, 0); 191272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 191372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPEVT_XFERNOTREADY: 191416e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if (usb_endpoint_xfer_isoc(dep->endpoint.desc)) { 191572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_start_isoc(dwc, dep, event); 191672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 191772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 191872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 191972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s: reason %s\n", 192040aa41fba348bc5bd19ff5bcf2b03d67bb01d1ceFelipe Balbi dep->name, event->status & 192140aa41fba348bc5bd19ff5bcf2b03d67bb01d1ceFelipe Balbi DEPEVT_STATUS_TRANSFER_ACTIVE 192272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ? "Transfer Active" 192372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi : "Transfer Not Active"); 192472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 192572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = __dwc3_gadget_kick_transfer(dep, 0, 1); 192672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!ret || ret == -EBUSY) 192772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 192872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 192972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "%s: failed to kick transfers\n", 193072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 193172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 193272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 193372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 1934879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi case DWC3_DEPEVT_STREAMEVT: 193516e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if (!usb_endpoint_xfer_bulk(dep->endpoint.desc)) { 1936879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dev_err(dwc->dev, "Stream event for non-Bulk %s\n", 1937879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dep->name); 1938879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi return; 1939879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi } 1940879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi 1941879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi switch (event->status) { 1942879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi case DEPEVT_STREAMEVT_FOUND: 1943879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dev_vdbg(dwc->dev, "Stream %d found and started\n", 1944879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi event->parameters); 1945879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi 1946879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi break; 1947879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi case DEPEVT_STREAMEVT_NOTFOUND: 1948879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi /* FALLTHROUGH */ 1949879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi default: 1950879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dev_dbg(dwc->dev, "Couldn't find suitable stream\n"); 1951879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi } 1952879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi break; 195372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPEVT_RXTXFIFOEVT: 195472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "%s FIFO Overrun\n", dep->name); 195572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 195672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPEVT_EPCMDCMPLT: 1957ea53b8828c50b7a5138a8931c41b2671682c86b5Felipe Balbi dev_vdbg(dwc->dev, "Endpoint Command Complete\n"); 195872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 195972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 196072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 196172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 196272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_disconnect_gadget(struct dwc3 *dwc) 196372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 196472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dwc->gadget_driver && dwc->gadget_driver->disconnect) { 196572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock(&dwc->lock); 196672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver->disconnect(&dwc->gadget); 196772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock(&dwc->lock); 196872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 196972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 197072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 197172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_stop_active_transfer(struct dwc3 *dwc, u32 epnum) 197272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 197372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 197472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 197572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 cmd; 197672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 197772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 197872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[epnum]; 197972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1980b4996a8631e80a2aaddb5c487ff6b9ad37315f70Felipe Balbi if (!dep->resource_index) 19813daf74d78dfcd552445c35f1b82a271ca305ceb9Pratyush Anand return; 19823daf74d78dfcd552445c35f1b82a271ca305ceb9Pratyush Anand 198357911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand /* 198457911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * NOTICE: We are violating what the Databook says about the 198557911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * EndTransfer command. Ideally we would _always_ wait for the 198657911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * EndTransfer Command Completion IRQ, but that's causing too 198757911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * much trouble synchronizing between us and gadget driver. 198857911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * 198957911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * We have discussed this with the IP Provider and it was 199057911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * suggested to giveback all requests here, but give HW some 199157911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * extra time to synchronize with the interconnect. We're using 199257911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * an arbitraty 100us delay for that. 199357911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * 199457911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * Note also that a similar handling was tested by Synopsys 199557911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * (thanks a lot Paul) and nothing bad has come out of it. 199657911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * In short, what we're doing is: 199757911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * 199857911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * - Issue EndTransfer WITH CMDIOC bit set 199957911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand * - Wait 100us 200057911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand */ 200157911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand 20023daf74d78dfcd552445c35f1b82a271ca305ceb9Pratyush Anand cmd = DWC3_DEPCMD_ENDTRANSFER; 20033daf74d78dfcd552445c35f1b82a271ca305ceb9Pratyush Anand cmd |= DWC3_DEPCMD_HIPRI_FORCERM | DWC3_DEPCMD_CMDIOC; 2004b4996a8631e80a2aaddb5c487ff6b9ad37315f70Felipe Balbi cmd |= DWC3_DEPCMD_PARAM(dep->resource_index); 20053daf74d78dfcd552445c35f1b82a271ca305ceb9Pratyush Anand memset(¶ms, 0, sizeof(params)); 20063daf74d78dfcd552445c35f1b82a271ca305ceb9Pratyush Anand ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, cmd, ¶ms); 20073daf74d78dfcd552445c35f1b82a271ca305ceb9Pratyush Anand WARN_ON_ONCE(ret); 2008b4996a8631e80a2aaddb5c487ff6b9ad37315f70Felipe Balbi dep->resource_index = 0; 2009041d81f493d90c940ec41f0ec98bc7c4f2fba431Felipe Balbi dep->flags &= ~DWC3_EP_BUSY; 201057911504a93909034ba5b90c20f3e6df8409ebd8Pratyush Anand udelay(100); 201172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 201272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 201372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_stop_active_transfers(struct dwc3 *dwc) 201472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 201572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 epnum; 201672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 201772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi for (epnum = 2; epnum < DWC3_ENDPOINTS_NUM; epnum++) { 201872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 201972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 202072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[epnum]; 202172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) 202272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi continue; 202372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 2024624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior dwc3_remove_requests(dwc, dep); 202572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 202672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 202772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 202872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_clear_stall_all_ep(struct dwc3 *dwc) 202972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 203072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 epnum; 203172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 203272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi for (epnum = 1; epnum < DWC3_ENDPOINTS_NUM; epnum++) { 203372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 203472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 203572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 203672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 203772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[epnum]; 203872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 203972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(dep->flags & DWC3_EP_STALL)) 204072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi continue; 204172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 204272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags &= ~DWC3_EP_STALL; 204372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 204472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0, sizeof(params)); 204572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, 204672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEPCMD_CLEARSTALL, ¶ms); 204772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi WARN_ON_ONCE(ret); 204872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 204972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 205072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 205172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_disconnect_interrupt(struct dwc3 *dwc) 205272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 2053c4430a26948b84c0d820e83f8c640229f960d3b6Felipe Balbi int reg; 2054c4430a26948b84c0d820e83f8c640229f960d3b6Felipe Balbi 205572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s\n", __func__); 205672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 205772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 205872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DCTL_INITU1ENA; 205972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 206072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 206172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DCTL_INITU2ENA; 206272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 206372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 206472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_disconnect_gadget(dwc); 2065b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman dwc->start_config_issued = false; 206672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 206772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_UNKNOWN; 2068df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi dwc->setup_packet_pending = false; 206972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 207072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 2071d7a46a8dfc45191b39daa19c05d3ff74d1881f15Paul Zimmermanstatic void dwc3_gadget_usb3_phy_suspend(struct dwc3 *dwc, int suspend) 207272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 207372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 207472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 207572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(0)); 207672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 2077d7a46a8dfc45191b39daa19c05d3ff74d1881f15Paul Zimmerman if (suspend) 207872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg |= DWC3_GUSB3PIPECTL_SUSPHY; 2079d7a46a8dfc45191b39daa19c05d3ff74d1881f15Paul Zimmerman else 2080d7a46a8dfc45191b39daa19c05d3ff74d1881f15Paul Zimmerman reg &= ~DWC3_GUSB3PIPECTL_SUSPHY; 208172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 208272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg); 208372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 208472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 2085d7a46a8dfc45191b39daa19c05d3ff74d1881f15Paul Zimmermanstatic void dwc3_gadget_usb2_phy_suspend(struct dwc3 *dwc, int suspend) 208672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 208772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 208872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 208972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0)); 209072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 2091d7a46a8dfc45191b39daa19c05d3ff74d1881f15Paul Zimmerman if (suspend) 209272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg |= DWC3_GUSB2PHYCFG_SUSPHY; 2093d7a46a8dfc45191b39daa19c05d3ff74d1881f15Paul Zimmerman else 2094d7a46a8dfc45191b39daa19c05d3ff74d1881f15Paul Zimmerman reg &= ~DWC3_GUSB2PHYCFG_SUSPHY; 209572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 209672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg); 209772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 209872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 209972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_reset_interrupt(struct dwc3 *dwc) 210072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 210172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 210272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 210372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s\n", __func__); 210472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 2105df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi /* 2106df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * WORKAROUND: DWC3 revisions <1.88a have an issue which 2107df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * would cause a missing Disconnect Event if there's a 2108df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * pending Setup Packet in the FIFO. 2109df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * 2110df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * There's no suggested workaround on the official Bug 2111df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * report, which states that "unless the driver/application 2112df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * is doing any special handling of a disconnect event, 2113df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * there is no functional issue". 2114df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * 2115df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * Unfortunately, it turns out that we _do_ some special 2116df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * handling of a disconnect event, namely complete all 2117df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * pending transfers, notify gadget driver of the 2118df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * disconnection, and so on. 2119df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * 2120df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * Our suggested workaround is to follow the Disconnect 2121df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * Event steps here, instead, based on a setup_packet_pending 2122df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * flag. Such flag gets set whenever we have a XferNotReady 2123df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * event on EP0 and gets cleared on XferComplete for the 2124df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * same endpoint. 2125df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * 2126df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * Refers to: 2127df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * 2128df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * STAR#9000466709: RTL: Device : Disconnect event not 2129df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * generated if setup packet pending in FIFO 2130df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi */ 2131df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi if (dwc->revision < DWC3_REVISION_188A) { 2132df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi if (dwc->setup_packet_pending) 2133df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi dwc3_gadget_disconnect_interrupt(dwc); 2134df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi } 2135df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi 2136961906edb549c95f4cc33e4f3dbfd0fcc364954dFelipe Balbi /* after reset -> Default State */ 2137961906edb549c95f4cc33e4f3dbfd0fcc364954dFelipe Balbi dwc->dev_state = DWC3_DEFAULT_STATE; 2138961906edb549c95f4cc33e4f3dbfd0fcc364954dFelipe Balbi 2139802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman /* Recent versions support automatic phy suspend and don't need this */ 2140802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman if (dwc->revision < DWC3_REVISION_194A) { 2141802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman /* Resume PHYs */ 2142802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman dwc3_gadget_usb2_phy_suspend(dwc, false); 2143802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman dwc3_gadget_usb3_phy_suspend(dwc, false); 2144802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman } 214572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 214672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dwc->gadget.speed != USB_SPEED_UNKNOWN) 214772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_disconnect_gadget(dwc); 214872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 214972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 215072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DCTL_TSTCTRL_MASK; 215172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 21523b637367ae40b6d3c20e30cb0cdd059e67bbf848Gerard Cauvy dwc->test_mode = false; 215372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 215472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_stop_active_transfers(dwc); 215572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_clear_stall_all_ep(dwc); 2156b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman dwc->start_config_issued = false; 215772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 215872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* Reset device address to zero */ 215972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCFG); 216072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~(DWC3_DCFG_DEVADDR_MASK); 216172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCFG, reg); 216272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 216372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 216472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_update_ram_clk_sel(struct dwc3 *dwc, u32 speed) 216572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 216672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 216772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 usb30_clock = DWC3_GCTL_CLK_BUS; 216872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 216972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 217072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We change the clock only at SS but I dunno why I would want to do 217172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * this. Maybe it becomes part of the power saving plan. 217272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 217372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 217472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (speed != DWC3_DSTS_SUPERSPEED) 217572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 217672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 217772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 217872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * RAMClkSel is reset to 0 after USB reset, so it must be reprogrammed 217972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * each time on Connect Done. 218072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 218172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!usb30_clock) 218272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 218372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 218472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_GCTL); 218572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg |= DWC3_GCTL_RAMCLKSEL(usb30_clock); 218672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_GCTL, reg); 218772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 218872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 2189d7a46a8dfc45191b39daa19c05d3ff74d1881f15Paul Zimmermanstatic void dwc3_gadget_phy_suspend(struct dwc3 *dwc, u8 speed) 219072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 219172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (speed) { 219272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_SPEED_SUPER: 2193d7a46a8dfc45191b39daa19c05d3ff74d1881f15Paul Zimmerman dwc3_gadget_usb2_phy_suspend(dwc, true); 219472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 219572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_SPEED_HIGH: 219672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_SPEED_FULL: 219772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_SPEED_LOW: 2198d7a46a8dfc45191b39daa19c05d3ff74d1881f15Paul Zimmerman dwc3_gadget_usb3_phy_suspend(dwc, true); 219972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 220072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 220172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 220272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 220372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_conndone_interrupt(struct dwc3 *dwc) 220472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 220572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 220672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 220772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 220872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 speed; 220972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 221072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s\n", __func__); 221172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 221272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 221372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi speed = reg & DWC3_DSTS_CONNECTSPD; 221472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->speed = speed; 221572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 221672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_update_ram_clk_sel(dwc, speed); 221772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 221872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (speed) { 221972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DCFG_SUPERSPEED: 222005870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi /* 222105870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * WORKAROUND: DWC3 revisions <1.90a have an issue which 222205870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * would cause a missing USB3 Reset event. 222305870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * 222405870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * In such situations, we should force a USB3 Reset 222505870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * event by calling our dwc3_gadget_reset_interrupt() 222605870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * routine. 222705870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * 222805870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * Refers to: 222905870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * 223005870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * STAR#9000483510: RTL: SS : USB3 reset event may 223105870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * not be generated always when the link enters poll 223205870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi */ 223305870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi if (dwc->revision < DWC3_REVISION_190A) 223405870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi dwc3_gadget_reset_interrupt(dwc); 223505870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi 223672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(512); 223772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ep0->maxpacket = 512; 223872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_SUPER; 223972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 224072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DCFG_HIGHSPEED: 224172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(64); 224272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ep0->maxpacket = 64; 224372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_HIGH; 224472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 224572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DCFG_FULLSPEED2: 224672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DCFG_FULLSPEED1: 224772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(64); 224872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ep0->maxpacket = 64; 224972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_FULL; 225072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 225172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DCFG_LOWSPEED: 225272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(8); 225372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ep0->maxpacket = 8; 225472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_LOW; 225572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 225672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 225772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 22582b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand /* Enable USB2 LPM Capability */ 22592b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand 22602b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand if ((dwc->revision > DWC3_REVISION_194A) 22612b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand && (speed != DWC3_DCFG_SUPERSPEED)) { 22622b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand reg = dwc3_readl(dwc->regs, DWC3_DCFG); 22632b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand reg |= DWC3_DCFG_LPM_CAP; 22642b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand dwc3_writel(dwc->regs, DWC3_DCFG, reg); 22652b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand 22662b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand reg = dwc3_readl(dwc->regs, DWC3_DCTL); 22672b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand reg &= ~(DWC3_DCTL_HIRD_THRES_MASK | DWC3_DCTL_L1_HIBER_EN); 22682b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand 22691a947746dbe1486d0e305ab512ddf085b7874cb3Felipe Balbi /* 22701a947746dbe1486d0e305ab512ddf085b7874cb3Felipe Balbi * TODO: This should be configurable. For now using 22711a947746dbe1486d0e305ab512ddf085b7874cb3Felipe Balbi * maximum allowed HIRD threshold value of 0b1100 22721a947746dbe1486d0e305ab512ddf085b7874cb3Felipe Balbi */ 22731a947746dbe1486d0e305ab512ddf085b7874cb3Felipe Balbi reg |= DWC3_DCTL_HIRD_THRES(12); 22742b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand 22752b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand dwc3_writel(dwc->regs, DWC3_DCTL, reg); 22762b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand } 22772b758350af19db9a5c98241cf222c2e211d7a912Pratyush Anand 2278802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman /* Recent versions support automatic phy suspend and don't need this */ 2279802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman if (dwc->revision < DWC3_REVISION_194A) { 2280802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman /* Suspend unneeded PHY */ 2281802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman dwc3_gadget_phy_suspend(dwc, dwc->gadget.speed); 2282802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman } 228372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 228472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[0]; 22854b345c9a3c7452340fb477868d8db475f05978b1Felipe Balbi ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL, true); 228672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 228772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to enable %s\n", dep->name); 228872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 228972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 229072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 229172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[1]; 22924b345c9a3c7452340fb477868d8db475f05978b1Felipe Balbi ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL, true); 229372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 229472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to enable %s\n", dep->name); 229572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 229672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 229772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 229872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 229972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Configure PHY via GUSB3PIPECTLn if required. 230072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 230172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Update GTXFIFOSIZn 230272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 230372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * In both cases reset values should be sufficient. 230472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 230572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 230672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 230772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_wakeup_interrupt(struct dwc3 *dwc) 230872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 230972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s\n", __func__); 231072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 231172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 231272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * TODO take core out of low power mode when that's 231372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * implemented. 231472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 231572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 231672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver->resume(&dwc->gadget); 231772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 231872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 231972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_linksts_change_interrupt(struct dwc3 *dwc, 232072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned int evtinfo) 232172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 2322fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi enum dwc3_link_state next = evtinfo & DWC3_LINK_STATE_MASK; 2323fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 2324fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi /* 2325fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * WORKAROUND: DWC3 Revisions <1.83a have an issue which, depending 2326fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * on the link partner, the USB session might do multiple entry/exit 2327fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * of low power states before a transfer takes place. 2328fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * 2329fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * Due to this problem, we might experience lower throughput. The 2330fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * suggested workaround is to disable DCTL[12:9] bits if we're 2331fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * transitioning from U1/U2 to U0 and enable those bits again 2332fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * after a transfer completes and there are no pending transfers 2333fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * on any of the enabled endpoints. 2334fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * 2335fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * This is the first half of that workaround. 2336fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * 2337fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * Refers to: 2338fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * 2339fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * STAR#9000446952: RTL: Device SS : if U1/U2 ->U0 takes >128us 2340fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * core send LGO_Ux entering U0 2341fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi */ 2342fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi if (dwc->revision < DWC3_REVISION_183A) { 2343fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi if (next == DWC3_LINK_STATE_U0) { 2344fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi u32 u1u2; 2345fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi u32 reg; 2346fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 2347fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi switch (dwc->link_state) { 2348fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi case DWC3_LINK_STATE_U1: 2349fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi case DWC3_LINK_STATE_U2: 2350fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 2351fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi u1u2 = reg & (DWC3_DCTL_INITU2ENA 2352fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi | DWC3_DCTL_ACCEPTU2ENA 2353fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi | DWC3_DCTL_INITU1ENA 2354fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi | DWC3_DCTL_ACCEPTU1ENA); 2355fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 2356fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi if (!dwc->u1u2) 2357fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi dwc->u1u2 = reg & u1u2; 2358fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 2359fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi reg &= ~u1u2; 2360fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 2361fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 2362fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi break; 2363fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi default: 2364fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi /* do nothing */ 2365fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi break; 2366fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi } 2367fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi } 2368fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi } 2369fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 2370fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi dwc->link_state = next; 2371019ac83252dc2b356cb0ca81c25a077ec90309e7Felipe Balbi 2372019ac83252dc2b356cb0ca81c25a077ec90309e7Felipe Balbi dev_vdbg(dwc->dev, "%s link %d\n", __func__, dwc->link_state); 237372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 237472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 237572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_interrupt(struct dwc3 *dwc, 237672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct dwc3_event_devt *event) 237772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 237872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (event->type) { 237972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_DISCONNECT: 238072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_disconnect_interrupt(dwc); 238172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 238272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_RESET: 238372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_reset_interrupt(dwc); 238472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 238572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_CONNECT_DONE: 238672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_conndone_interrupt(dwc); 238772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 238872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_WAKEUP: 238972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_wakeup_interrupt(dwc); 239072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 239172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_LINK_STATUS_CHANGE: 239272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_linksts_change_interrupt(dwc, event->event_info); 239372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 239472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_EOPF: 239572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "End of Periodic Frame\n"); 239672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 239772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_SOF: 239872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "Start of Periodic Frame\n"); 239972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 240072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_ERRATIC_ERROR: 240172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "Erratic Error\n"); 240272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 240372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_CMD_CMPL: 240472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "Command Complete\n"); 240572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 240672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_OVERFLOW: 240772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "Overflow\n"); 240872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 240972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 241072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "UNKNOWN IRQ %d\n", event->type); 241172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 241272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 241372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 241472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_process_event_entry(struct dwc3 *dwc, 241572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const union dwc3_event *event) 241672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 241772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* Endpoint IRQ, handle it and return early */ 241872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (event->type.is_devspec == 0) { 241972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* depevt */ 242072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return dwc3_endpoint_interrupt(dwc, &event->depevt); 242172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 242272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 242372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (event->type.type) { 242472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_EVENT_TYPE_DEV: 242572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_interrupt(dwc, &event->devt); 242672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 242772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* REVISIT what to do with Carkit and I2C events ? */ 242872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 242972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "UNKNOWN IRQ type %d\n", event->raw); 243072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 243172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 243272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 243372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic irqreturn_t dwc3_process_event_buf(struct dwc3 *dwc, u32 buf) 243472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 243572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_event_buffer *evt; 243672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int left; 243772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 count; 243872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 243972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi count = dwc3_readl(dwc->regs, DWC3_GEVNTCOUNT(buf)); 244072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi count &= DWC3_GEVNTCOUNT_MASK; 244172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!count) 244272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return IRQ_NONE; 244372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 244472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi evt = dwc->ev_buffs[buf]; 244572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi left = count; 244672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 244772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi while (left > 0) { 244872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi union dwc3_event event; 244972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 2450d70d84423cbc5d6d929640189cf204e693024309Felipe Balbi event.raw = *(u32 *) (evt->buf + evt->lpos); 2451d70d84423cbc5d6d929640189cf204e693024309Felipe Balbi 245272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_process_event_entry(dwc, &event); 245372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 245472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * XXX we wrap around correctly to the next entry as almost all 245572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * entries are 4 bytes in size. There is one entry which has 12 245672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * bytes which is a regular entry followed by 8 bytes data. ATM 245772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * I don't know how things are organized if were get next to the 245872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * a boundary so I worry about that once we try to handle that. 245972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 246072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi evt->lpos = (evt->lpos + 4) % DWC3_EVENT_BUFFERS_SIZE; 246172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi left -= 4; 246272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 246372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_GEVNTCOUNT(buf), 4); 246472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 246572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 246672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return IRQ_HANDLED; 246772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 246872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 246972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic irqreturn_t dwc3_interrupt(int irq, void *_dwc) 247072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 247172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = _dwc; 247272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int i; 247372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi irqreturn_t ret = IRQ_NONE; 247472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 247572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock(&dwc->lock); 247672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 24779f622b2a407d8b34a5a7f5b4abd8b29b25cf4f32Felipe Balbi for (i = 0; i < dwc->num_event_buffers; i++) { 247872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi irqreturn_t status; 247972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 248072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi status = dwc3_process_event_buf(dwc, i); 248172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (status == IRQ_HANDLED) 248272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = status; 248372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 248472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 248572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock(&dwc->lock); 248672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 248772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 248872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 248972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 249072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/** 249172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * dwc3_gadget_init - Initializes gadget related registers 24921d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * @dwc: pointer to our controller context structure 249372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 249472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Returns 0 on success otherwise negative errno. 249572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 249641ac7b3ab7fe1d6175839947a877fdf95cbd2211Bill Pembertonint dwc3_gadget_init(struct dwc3 *dwc) 249772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 249872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 249972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 250072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 250172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ctrl_req = dma_alloc_coherent(dwc->dev, sizeof(*dwc->ctrl_req), 250272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi &dwc->ctrl_req_addr, GFP_KERNEL); 250372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dwc->ctrl_req) { 250472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to allocate ctrl request\n"); 250572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -ENOMEM; 250672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto err0; 250772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 250872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 250972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ep0_trb = dma_alloc_coherent(dwc->dev, sizeof(*dwc->ep0_trb), 251072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi &dwc->ep0_trb_addr, GFP_KERNEL); 251172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dwc->ep0_trb) { 251272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to allocate ep0 trb\n"); 251372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -ENOMEM; 251472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto err1; 251572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 251672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 25173ef35fafdc87b72851f7785dc5331a0f4eb1b3ceFelipe Balbi dwc->setup_buf = kzalloc(DWC3_EP0_BOUNCE_SIZE, GFP_KERNEL); 251872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dwc->setup_buf) { 251972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to allocate setup buffer\n"); 252072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -ENOMEM; 252172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto err2; 252272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 252372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 25245812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi dwc->ep0_bounce = dma_alloc_coherent(dwc->dev, 25253ef35fafdc87b72851f7785dc5331a0f4eb1b3ceFelipe Balbi DWC3_EP0_BOUNCE_SIZE, &dwc->ep0_bounce_addr, 25263ef35fafdc87b72851f7785dc5331a0f4eb1b3ceFelipe Balbi GFP_KERNEL); 25275812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi if (!dwc->ep0_bounce) { 25285812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi dev_err(dwc->dev, "failed to allocate ep0 bounce buffer\n"); 25295812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi ret = -ENOMEM; 25305812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi goto err3; 25315812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi } 25325812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi 253372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ops = &dwc3_gadget_ops; 2534d327ab5b6d660d6fe22b073b743fde1668e593bbMichal Nazarewicz dwc->gadget.max_speed = USB_SPEED_SUPER; 253572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_UNKNOWN; 253672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.dev.parent = dwc->dev; 2537eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dwc->gadget.sg_supported = true; 253872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 253972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_set_coherent_mask(&dwc->gadget.dev, dwc->dev->coherent_dma_mask); 254072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 254172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.dev.dma_parms = dwc->dev->dma_parms; 254272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.dev.dma_mask = dwc->dev->dma_mask; 254372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.dev.release = dwc3_gadget_release; 254472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.name = "dwc3-gadget"; 254572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 254672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 254772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * REVISIT: Here we should clear all pending IRQs to be 254872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * sure we're starting from a well known location. 254972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 255072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 255172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_gadget_init_endpoints(dwc); 255272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 25535812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi goto err4; 255472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 2555e6a3b5e2888b51e37c65c97dae966f793bc4806aSebastian Andrzej Siewior reg = dwc3_readl(dwc->regs, DWC3_DCFG); 2556e6a3b5e2888b51e37c65c97dae966f793bc4806aSebastian Andrzej Siewior reg |= DWC3_DCFG_LPM_CAP; 2557e6a3b5e2888b51e37c65c97dae966f793bc4806aSebastian Andrzej Siewior dwc3_writel(dwc->regs, DWC3_DCFG, reg); 2558e6a3b5e2888b51e37c65c97dae966f793bc4806aSebastian Andrzej Siewior 25598698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi /* Enable USB2 LPM and automatic phy suspend only on recent versions */ 2560802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman if (dwc->revision >= DWC3_REVISION_194A) { 2561dcae3573b98b2205961bfa5821427f5664422cd8Pratyush Anand dwc3_gadget_usb2_phy_suspend(dwc, false); 2562dcae3573b98b2205961bfa5821427f5664422cd8Pratyush Anand dwc3_gadget_usb3_phy_suspend(dwc, false); 2563802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman } 2564802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman 256572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = usb_add_gadget_udc(dwc->dev, &dwc->gadget); 256672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 256772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to register udc\n"); 25688698e2acf3a5e8d6f260ca7675f94e5087df5ae8Felipe Balbi goto err5; 256972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 257072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 257172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 257272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 25735812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbierr5: 257472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_free_endpoints(dwc); 257572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 25765812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbierr4: 25773ef35fafdc87b72851f7785dc5331a0f4eb1b3ceFelipe Balbi dma_free_coherent(dwc->dev, DWC3_EP0_BOUNCE_SIZE, 25783ef35fafdc87b72851f7785dc5331a0f4eb1b3ceFelipe Balbi dwc->ep0_bounce, dwc->ep0_bounce_addr); 25795812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi 258072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbierr3: 25810fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi kfree(dwc->setup_buf); 258272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 258372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbierr2: 258472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(*dwc->ep0_trb), 258572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ep0_trb, dwc->ep0_trb_addr); 258672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 258772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbierr1: 258872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(*dwc->ctrl_req), 258972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ctrl_req, dwc->ctrl_req_addr); 259072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 259172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbierr0: 259272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 259372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 259472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 259572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbivoid dwc3_gadget_exit(struct dwc3 *dwc) 259672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 259772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi usb_del_gadget_udc(&dwc->gadget); 259872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 259972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_free_endpoints(dwc); 260072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 26013ef35fafdc87b72851f7785dc5331a0f4eb1b3ceFelipe Balbi dma_free_coherent(dwc->dev, DWC3_EP0_BOUNCE_SIZE, 26023ef35fafdc87b72851f7785dc5331a0f4eb1b3ceFelipe Balbi dwc->ep0_bounce, dwc->ep0_bounce_addr); 26035812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi 26040fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi kfree(dwc->setup_buf); 260572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 260672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(*dwc->ep0_trb), 260772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ep0_trb, dwc->ep0_trb_addr); 260872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 260972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(*dwc->ctrl_req), 261072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ctrl_req, dwc->ctrl_req_addr); 261172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 2612