gadget.c revision 802fde983e8a3391e059bd41fc272993ae642816
172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/** 272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * gadget.c - DesignWare USB3 DRD Controller Gadget Framework Link 372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com 572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Authors: Felipe Balbi <balbi@ti.com>, 772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Sebastian Andrzej Siewior <bigeasy@linutronix.de> 872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Redistribution and use in source and binary forms, with or without 1072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * modification, are permitted provided that the following conditions 1172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * are met: 1272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 1. Redistributions of source code must retain the above copyright 1372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * notice, this list of conditions, and the following disclaimer, 1472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * without modification. 1572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 2. Redistributions in binary form must reproduce the above copyright 1672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * notice, this list of conditions and the following disclaimer in the 1772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * documentation and/or other materials provided with the distribution. 1872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 3. The names of the above-listed copyright holders may not be used 1972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * to endorse or promote products derived from this software without 2072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * specific prior written permission. 2172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 2272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * ALTERNATIVELY, this software may be distributed under the terms of the 2372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * GNU General Public License ("GPL") version 2, as published by the Free 2472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Software Foundation. 2572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 2672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS 2772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 2872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 2972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 3072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 3172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 3272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 3372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 3472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 3572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 3672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 3772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 3872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 3972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/kernel.h> 4072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/delay.h> 4172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/slab.h> 4272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/spinlock.h> 4372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/platform_device.h> 4472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/pm_runtime.h> 4572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/interrupt.h> 4672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/io.h> 4772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/list.h> 4872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/dma-mapping.h> 4972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 5072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/usb/ch9.h> 5172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/usb/gadget.h> 5272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 5372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include "core.h" 5472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include "gadget.h" 5572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include "io.h" 5672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 5704a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi/** 5804a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi * dwc3_gadget_set_test_mode - Enables USB2 Test Modes 5904a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi * @dwc: pointer to our context structure 6004a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi * @mode: the mode to set (J, K SE0 NAK, Force Enable) 6104a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi * 6204a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi * Caller should take care of locking. This function will 6304a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi * return 0 on success or -EINVAL if wrong Test Selector 6404a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi * is passed 6504a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi */ 6604a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbiint dwc3_gadget_set_test_mode(struct dwc3 *dwc, int mode) 6704a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi{ 6804a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi u32 reg; 6904a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi 7004a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 7104a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi reg &= ~DWC3_DCTL_TSTCTRL_MASK; 7204a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi 7304a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi switch (mode) { 7404a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi case TEST_J: 7504a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi case TEST_K: 7604a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi case TEST_SE0_NAK: 7704a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi case TEST_PACKET: 7804a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi case TEST_FORCE_EN: 7904a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi reg |= mode << 1; 8004a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi break; 8104a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi default: 8204a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi return -EINVAL; 8304a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi } 8404a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi 8504a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 8604a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi 8704a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi return 0; 8804a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi} 8904a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi 908598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi/** 918598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi * dwc3_gadget_set_link_state - Sets USB Link to a particular State 928598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi * @dwc: pointer to our context structure 938598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi * @state: the state to put link into 948598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi * 958598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi * Caller should take care of locking. This function will 96aee63e3cb6b0396b99c6387a47cb90a7417f3957Paul Zimmerman * return 0 on success or -ETIMEDOUT. 978598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi */ 988598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbiint dwc3_gadget_set_link_state(struct dwc3 *dwc, enum dwc3_link_state state) 998598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi{ 100aee63e3cb6b0396b99c6387a47cb90a7417f3957Paul Zimmerman int retries = 10000; 1018598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi u32 reg; 1028598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi 103802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman /* 104802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman * Wait until device controller is ready. Only applies to 1.94a and 105802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman * later RTL. 106802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman */ 107802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman if (dwc->revision >= DWC3_REVISION_194A) { 108802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman while (--retries) { 109802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman reg = dwc3_readl(dwc->regs, DWC3_DSTS); 110802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman if (reg & DWC3_DSTS_DCNRD) 111802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman udelay(5); 112802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman else 113802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman break; 114802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman } 115802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman 116802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman if (retries <= 0) 117802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman return -ETIMEDOUT; 118802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman } 119802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman 1208598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 1218598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi reg &= ~DWC3_DCTL_ULSTCHNGREQ_MASK; 1228598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi 1238598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi /* set requested state */ 1248598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi reg |= DWC3_DCTL_ULSTCHNGREQ(state); 1258598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 1268598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi 127802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman /* 128802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman * The following code is racy when called from dwc3_gadget_wakeup, 129802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman * and is not needed, at least on newer versions 130802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman */ 131802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman if (dwc->revision >= DWC3_REVISION_194A) 132802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman return 0; 133802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman 1348598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi /* wait for a change in DSTS */ 135aed430e5139af3e2c251f52db7fc6c5e2ce2b714Paul Zimmerman retries = 10000; 1368598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi while (--retries) { 1378598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 1388598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi 1398598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi if (DWC3_DSTS_USBLNKST(reg) == state) 1408598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi return 0; 1418598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi 142aee63e3cb6b0396b99c6387a47cb90a7417f3957Paul Zimmerman udelay(5); 1438598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi } 1448598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi 1458598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi dev_vdbg(dwc->dev, "link state change request timed out\n"); 1468598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi 1478598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi return -ETIMEDOUT; 1488598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi} 1498598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi 150457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi/** 151457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * dwc3_gadget_resize_tx_fifos - reallocate fifo spaces for current use-case 152457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * @dwc: pointer to our context structure 153457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * 154457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * This function will a best effort FIFO allocation in order 155457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * to improve FIFO usage and throughput, while still allowing 156457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * us to enable as many endpoints as possible. 157457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * 158457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * Keep in mind that this operation will be highly dependent 159457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * on the configured size for RAM1 - which contains TxFifo -, 160457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * the amount of endpoints enabled on coreConsultant tool, and 161457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * the width of the Master Bus. 162457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * 163457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * In the ideal world, we would always be able to satisfy the 164457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * following equation: 165457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * 166457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * ((512 + 2 * MDWIDTH-Bytes) + (Number of IN Endpoints - 1) * \ 167457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * (3 * (1024 + MDWIDTH-Bytes) + MDWIDTH-Bytes)) / MDWIDTH-Bytes 168457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * 169457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * Unfortunately, due to many variables that's not always the case. 170457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi */ 171457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbiint dwc3_gadget_resize_tx_fifos(struct dwc3 *dwc) 172457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi{ 173457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi int last_fifo_depth = 0; 174457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi int ram1_depth; 175457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi int fifo_size; 176457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi int mdwidth; 177457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi int num; 178457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 179457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi if (!dwc->needs_fifo_resize) 180457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi return 0; 181457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 182457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi ram1_depth = DWC3_RAM1_DEPTH(dwc->hwparams.hwparams7); 183457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi mdwidth = DWC3_MDWIDTH(dwc->hwparams.hwparams0); 184457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 185457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi /* MDWIDTH is represented in bits, we need it in bytes */ 186457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi mdwidth >>= 3; 187457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 188457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi /* 189457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * FIXME For now we will only allocate 1 wMaxPacketSize space 190457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * for each enabled endpoint, later patches will come to 191457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * improve this algorithm so that we better use the internal 192457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi * FIFO space 193457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi */ 194457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi for (num = 0; num < DWC3_ENDPOINTS_NUM; num++) { 195457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi struct dwc3_ep *dep = dwc->eps[num]; 196457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi int fifo_number = dep->number >> 1; 1972e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi int mult = 1; 198457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi int tmp; 199457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 200457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi if (!(dep->number & 1)) 201457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi continue; 202457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 203457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) 204457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi continue; 205457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 20616e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if (usb_endpoint_xfer_bulk(dep->endpoint.desc) 20716e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz || usb_endpoint_xfer_isoc(dep->endpoint.desc)) 2082e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi mult = 3; 2092e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi 2102e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi /* 2112e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi * REVISIT: the following assumes we will always have enough 2122e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi * space available on the FIFO RAM for all possible use cases. 2132e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi * Make sure that's true somehow and change FIFO allocation 2142e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi * accordingly. 2152e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi * 2162e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi * If we have Bulk or Isochronous endpoints, we want 2172e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi * them to be able to be very, very fast. So we're giving 2182e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi * those endpoints a fifo_size which is enough for 3 full 2192e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi * packets 2202e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi */ 2212e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi tmp = mult * (dep->endpoint.maxpacket + mdwidth); 222457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi tmp += mdwidth; 223457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 224457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi fifo_size = DIV_ROUND_UP(tmp, mdwidth); 2252e81c36a00d0eb8ce72faaaec1a1d865617374aeFelipe Balbi 226457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi fifo_size |= (last_fifo_depth << 16); 227457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 228457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi dev_vdbg(dwc->dev, "%s: Fifo Addr %04x Size %d\n", 229457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi dep->name, last_fifo_depth, fifo_size & 0xffff); 230457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 231457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi dwc3_writel(dwc->regs, DWC3_GTXFIFOSIZ(fifo_number), 232457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi fifo_size); 233457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 234457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi last_fifo_depth += (fifo_size & 0xffff); 235457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi } 236457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 237457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi return 0; 238457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi} 239457e84b6624b4d97e6ffae437887ea51a22d54a0Felipe Balbi 24072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbivoid dwc3_gadget_giveback(struct dwc3_ep *dep, struct dwc3_request *req, 24172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int status) 24272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 24372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 24472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 24572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (req->queued) { 246eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (req->request.num_mapped_sgs) 247eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dep->busy_slot += req->request.num_mapped_sgs; 248eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi else 249eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dep->busy_slot++; 250eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi 25172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 25272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Skip LINK TRB. We can't use req->trb and check for 25372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * DWC3_TRBCTL_LINK_TRB because it points the TRB we just 25472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * completed (not the LINK TRB). 25572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 25672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (((dep->busy_slot & DWC3_TRB_MASK) == DWC3_TRB_NUM - 1) && 25716e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz usb_endpoint_xfer_isoc(dep->endpoint.desc)) 25872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->busy_slot++; 25972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 26072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_del(&req->list); 261eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi req->trb = NULL; 26272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 26372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (req->request.status == -EINPROGRESS) 26472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.status = status; 26572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 2660fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi usb_gadget_unmap_request(&dwc->gadget, &req->request, 2670fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi req->direction); 26872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 26972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "request %p from %s completed %d/%d ===> %d\n", 27072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req, dep->name, req->request.actual, 27172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.length, status); 27272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 27372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock(&dwc->lock); 2740fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi req->request.complete(&dep->endpoint, &req->request); 27572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock(&dwc->lock); 27672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 27772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 27872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic const char *dwc3_gadget_ep_cmd_string(u8 cmd) 27972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 28072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (cmd) { 28172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_DEPSTARTCFG: 28272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Start New Configuration"; 28372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_ENDTRANSFER: 28472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "End Transfer"; 28572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_UPDATETRANSFER: 28672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Update Transfer"; 28772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_STARTTRANSFER: 28872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Start Transfer"; 28972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_CLEARSTALL: 29072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Clear Stall"; 29172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_SETSTALL: 29272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Set Stall"; 293802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman case DWC3_DEPCMD_GETEPSTATE: 294802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman return "Get Endpoint State"; 29572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_SETTRANSFRESOURCE: 29672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Set Endpoint Transfer Resource"; 29772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_SETEPCONFIG: 29872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Set Endpoint Configuration"; 29972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 30072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "UNKNOWN command"; 30172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 30272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 30372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 304b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbiint dwc3_send_gadget_generic_command(struct dwc3 *dwc, int cmd, u32 param) 305b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi{ 306b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi u32 timeout = 500; 307b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi u32 reg; 308b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi 309b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi dwc3_writel(dwc->regs, DWC3_DGCMDPAR, param); 310b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi dwc3_writel(dwc->regs, DWC3_DGCMD, cmd | DWC3_DGCMD_CMDACT); 311b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi 312b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi do { 313b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DGCMD); 314b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi if (!(reg & DWC3_DGCMD_CMDACT)) { 315b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi dev_vdbg(dwc->dev, "Command Complete --> %d\n", 316b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi DWC3_DGCMD_STATUS(reg)); 317b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi return 0; 318b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi } 319b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi 320b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi /* 321b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi * We can't sleep here, because it's also called from 322b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi * interrupt context. 323b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi */ 324b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi timeout--; 325b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi if (!timeout) 326b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi return -ETIMEDOUT; 327b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi udelay(1); 328b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi } while (1); 329b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi} 330b09bb64239c83113b8b35fa6a1ecae43d8297eaaFelipe Balbi 33172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiint dwc3_send_gadget_ep_cmd(struct dwc3 *dwc, unsigned ep, 33272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned cmd, struct dwc3_gadget_ep_cmd_params *params) 33372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 33472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = dwc->eps[ep]; 33561d58242f634642de42d6a4098913b7254a65053Sebastian Andrzej Siewior u32 timeout = 500; 33672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 33772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 33872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s: cmd '%s' params %08x %08x %08x\n", 33972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name, 340dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi dwc3_gadget_ep_cmd_string(cmd), params->param0, 341dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params->param1, params->param2); 34272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 343dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEPCMDPAR0(ep), params->param0); 344dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEPCMDPAR1(ep), params->param1); 345dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEPCMDPAR2(ep), params->param2); 34672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 34772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEPCMD(ep), cmd | DWC3_DEPCMD_CMDACT); 34872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi do { 34972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DEPCMD(ep)); 35072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(reg & DWC3_DEPCMD_CMDACT)) { 351164f6e141ed214bda30fb219d41ec3254bd90886Felipe Balbi dev_vdbg(dwc->dev, "Command Complete --> %d\n", 352164f6e141ed214bda30fb219d41ec3254bd90886Felipe Balbi DWC3_DEPCMD_STATUS(reg)); 35372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 35472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 35572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 35672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 35772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We can't sleep here, because it is also called from 35872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * interrupt context. 35972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 36072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi timeout--; 36172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!timeout) 36272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -ETIMEDOUT; 36372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 36461d58242f634642de42d6a4098913b7254a65053Sebastian Andrzej Siewior udelay(1); 36572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } while (1); 36672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 36772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 36872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic dma_addr_t dwc3_trb_dma_offset(struct dwc3_ep *dep, 369f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi struct dwc3_trb *trb) 37072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 371c439ef87c33a1df30f528cb152151465c2529cacPaul Zimmerman u32 offset = (char *) trb - (char *) dep->trb_pool; 37272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 37372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return dep->trb_pool_dma + offset; 37472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 37572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 37672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_alloc_trb_pool(struct dwc3_ep *dep) 37772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 37872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 37972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 38072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->trb_pool) 38172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 38272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 38372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->number == 0 || dep->number == 1) 38472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 38572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 38672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->trb_pool = dma_alloc_coherent(dwc->dev, 38772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi sizeof(struct dwc3_trb) * DWC3_TRB_NUM, 38872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi &dep->trb_pool_dma, GFP_KERNEL); 38972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dep->trb_pool) { 39072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dep->dwc->dev, "failed to allocate trb pool for %s\n", 39172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 39272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -ENOMEM; 39372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 39472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 39572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 39672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 39772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 39872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_free_trb_pool(struct dwc3_ep *dep) 39972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 40072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 40172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 40272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(struct dwc3_trb) * DWC3_TRB_NUM, 40372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->trb_pool, dep->trb_pool_dma); 40472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 40572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->trb_pool = NULL; 40672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->trb_pool_dma = 0; 40772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 40872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 40972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_start_config(struct dwc3 *dwc, struct dwc3_ep *dep) 41072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 41172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 41272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 cmd; 41372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 41472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0x00, sizeof(params)); 41572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 41672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->number != 1) { 41772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd = DWC3_DEPCMD_DEPSTARTCFG; 41872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* XferRscIdx == 0 for ep0 and 2 for the remaining */ 419b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman if (dep->number > 1) { 420b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman if (dwc->start_config_issued) 421b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman return 0; 422b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman dwc->start_config_issued = true; 42372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd |= DWC3_DEPCMD_PARAM(2); 424b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman } 42572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 42672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return dwc3_send_gadget_ep_cmd(dwc, 0, cmd, ¶ms); 42772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 42872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 42972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 43072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 43172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 43272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_set_ep_config(struct dwc3 *dwc, struct dwc3_ep *dep, 433c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi const struct usb_endpoint_descriptor *desc, 434c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi const struct usb_ss_ep_comp_descriptor *comp_desc) 43572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 43672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 43772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 43872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0x00, sizeof(params)); 43972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 440dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param0 = DWC3_DEPCFG_EP_TYPE(usb_endpoint_type(desc)) 441dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi | DWC3_DEPCFG_MAX_PACKET_SIZE(usb_endpoint_maxp(desc)) 442dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi | DWC3_DEPCFG_BURST_SIZE(dep->endpoint.maxburst); 44372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 444dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param1 = DWC3_DEPCFG_XFER_COMPLETE_EN 445dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi | DWC3_DEPCFG_XFER_NOT_READY_EN; 44672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 44718b7ede5f7ee2092aedcb578d3ac30bd5d4fc23cFelipe Balbi if (usb_ss_max_streams(comp_desc) && usb_endpoint_xfer_bulk(desc)) { 448dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param1 |= DWC3_DEPCFG_STREAM_CAPABLE 449dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi | DWC3_DEPCFG_STREAM_EVENT_EN; 450879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dep->stream_capable = true; 451879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi } 452879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi 45372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (usb_endpoint_xfer_isoc(desc)) 454dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param1 |= DWC3_DEPCFG_XFER_IN_PROGRESS_EN; 45572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 45672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 45772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We are doing 1:1 mapping for endpoints, meaning 45872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Physical Endpoints 2 maps to Logical Endpoint 2 and 45972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * so on. We consider the direction bit as part of the physical 46072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * endpoint number. So USB endpoint 0x81 is 0x03. 46172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 462dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param1 |= DWC3_DEPCFG_EP_NUMBER(dep->number); 46372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 46472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 46572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We must use the lower 16 TX FIFOs even though 46672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * HW might have more 46772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 46872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->direction) 469dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param0 |= DWC3_DEPCFG_FIFO_NUMBER(dep->number >> 1); 47072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 47172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (desc->bInterval) { 472dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param1 |= DWC3_DEPCFG_BINTERVAL_M1(desc->bInterval - 1); 47372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->interval = 1 << (desc->bInterval - 1); 47472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 47572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 47672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return dwc3_send_gadget_ep_cmd(dwc, dep->number, 47772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEPCMD_SETEPCONFIG, ¶ms); 47872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 47972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 48072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_set_xfer_resource(struct dwc3 *dwc, struct dwc3_ep *dep) 48172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 48272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 48372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 48472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0x00, sizeof(params)); 48572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 486dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param0 = DWC3_DEPXFERCFG_NUM_XFER_RES(1); 48772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 48872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return dwc3_send_gadget_ep_cmd(dwc, dep->number, 48972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEPCMD_SETTRANSFRESOURCE, ¶ms); 49072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 49172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 49272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/** 49372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * __dwc3_gadget_ep_enable - Initializes a HW endpoint 49472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * @dep: endpoint to be initialized 49572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * @desc: USB Endpoint Descriptor 49672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 49772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Caller should take care of locking 49872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 49972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int __dwc3_gadget_ep_enable(struct dwc3_ep *dep, 500c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi const struct usb_endpoint_descriptor *desc, 501c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi const struct usb_ss_ep_comp_descriptor *comp_desc) 50272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 50372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 50472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 50572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret = -ENOMEM; 50672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 50772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) { 50872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_gadget_start_config(dwc, dep); 50972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 51072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 51172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 51272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 513c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi ret = dwc3_gadget_set_ep_config(dwc, dep, desc, comp_desc); 51472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 51572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 51672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 51772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) { 518f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi struct dwc3_trb *trb_st_hw; 519f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi struct dwc3_trb *trb_link; 52072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 52172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_gadget_set_xfer_resource(dwc, dep); 52272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 52372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 52472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 52516e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz dep->endpoint.desc = desc; 526c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi dep->comp_desc = comp_desc; 52772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->type = usb_endpoint_type(desc); 52872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags |= DWC3_EP_ENABLED; 52972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 53072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DALEPENA); 53172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg |= DWC3_DALEPENA_EP(dep->number); 53272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DALEPENA, reg); 53372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 53472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!usb_endpoint_xfer_isoc(desc)) 53572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 53672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 53772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(&trb_link, 0, sizeof(trb_link)); 53872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 5391d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman /* Link TRB for ISOC. The HWO bit is never reset */ 54072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trb_st_hw = &dep->trb_pool[0]; 54172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 542f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb_link = &dep->trb_pool[DWC3_TRB_NUM - 1]; 54372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 544f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb_link->bpl = lower_32_bits(dwc3_trb_dma_offset(dep, trb_st_hw)); 545f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb_link->bph = upper_32_bits(dwc3_trb_dma_offset(dep, trb_st_hw)); 546f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb_link->ctrl |= DWC3_TRBCTL_LINK_TRB; 547f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb_link->ctrl |= DWC3_TRB_CTRL_HWO; 54872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 54972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 55072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 55172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 55272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 553624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewiorstatic void dwc3_stop_active_transfer(struct dwc3 *dwc, u32 epnum); 554624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewiorstatic void dwc3_remove_requests(struct dwc3 *dwc, struct dwc3_ep *dep) 55572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 55672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req; 55772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 558624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior if (!list_empty(&dep->req_queued)) 559624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior dwc3_stop_active_transfer(dwc, dep->number); 560624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior 56172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi while (!list_empty(&dep->request_list)) { 56272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req = next_request(&dep->request_list); 56372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 564624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior dwc3_gadget_giveback(dep, req, -ESHUTDOWN); 56572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 56672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 56772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 56872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/** 56972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * __dwc3_gadget_ep_disable - Disables a HW endpoint 57072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * @dep: the endpoint to disable 57172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 572624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior * This function also removes requests which are currently processed ny the 573624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior * hardware and those which are not yet scheduled. 574624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior * Caller should take care of locking. 57572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 57672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int __dwc3_gadget_ep_disable(struct dwc3_ep *dep) 57772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 57872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 57972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 58072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 581624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior dwc3_remove_requests(dwc, dep); 58272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 58372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DALEPENA); 58472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DALEPENA_EP(dep->number); 58572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DALEPENA, reg); 58672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 587879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dep->stream_capable = false; 588f9c56cdd3905c96c600456203637bd7ec8ec6383Ido Shayevitz dep->endpoint.desc = NULL; 589c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi dep->comp_desc = NULL; 59072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->type = 0; 591879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dep->flags = 0; 59272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 59372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 59472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 59572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 59672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 59772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 59872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep0_enable(struct usb_ep *ep, 59972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct usb_endpoint_descriptor *desc) 60072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 60172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EINVAL; 60272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 60372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 60472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep0_disable(struct usb_ep *ep) 60572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 60672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EINVAL; 60772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 60872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 60972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 61072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 61172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_enable(struct usb_ep *ep, 61272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct usb_endpoint_descriptor *desc) 61372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 61472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 61572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc; 61672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 61772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 61872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 61972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!ep || !desc || desc->bDescriptorType != USB_DT_ENDPOINT) { 62072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi pr_debug("dwc3: invalid parameters\n"); 62172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EINVAL; 62272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 62372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 62472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!desc->wMaxPacketSize) { 62572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi pr_debug("dwc3: missing wMaxPacketSize\n"); 62672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EINVAL; 62772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 62872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 62972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = to_dwc3_ep(ep); 63072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc = dep->dwc; 63172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 63272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (usb_endpoint_type(desc)) { 63372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_ENDPOINT_XFER_CONTROL: 63427a78d6a283d6782438f72306746afe4bf44c215Anton Tikhomirov strlcat(dep->name, "-control", sizeof(dep->name)); 63572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 63672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_ENDPOINT_XFER_ISOC: 63727a78d6a283d6782438f72306746afe4bf44c215Anton Tikhomirov strlcat(dep->name, "-isoc", sizeof(dep->name)); 63872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 63972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_ENDPOINT_XFER_BULK: 64027a78d6a283d6782438f72306746afe4bf44c215Anton Tikhomirov strlcat(dep->name, "-bulk", sizeof(dep->name)); 64172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 64272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_ENDPOINT_XFER_INT: 64327a78d6a283d6782438f72306746afe4bf44c215Anton Tikhomirov strlcat(dep->name, "-int", sizeof(dep->name)); 64472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 64572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 64672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "invalid endpoint transfer type\n"); 64772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 64872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 64972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->flags & DWC3_EP_ENABLED) { 65072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_WARN_ONCE(dwc->dev, true, "%s is already enabled\n", 65172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 65272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 65372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 65472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 65572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "Enabling %s\n", dep->name); 65672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 65772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 658c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi ret = __dwc3_gadget_ep_enable(dep, desc, ep->comp_desc); 65972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 66072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 66172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 66272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 66372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 66472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_disable(struct usb_ep *ep) 66572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 66672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 66772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc; 66872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 66972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 67072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 67172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!ep) { 67272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi pr_debug("dwc3: invalid parameters\n"); 67372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EINVAL; 67472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 67572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 67672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = to_dwc3_ep(ep); 67772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc = dep->dwc; 67872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 67972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) { 68072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_WARN_ONCE(dwc->dev, true, "%s is already disabled\n", 68172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 68272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 68372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 68472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 68572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi snprintf(dep->name, sizeof(dep->name), "ep%d%s", 68672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->number >> 1, 68772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi (dep->number & 1) ? "in" : "out"); 68872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 68972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 69072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = __dwc3_gadget_ep_disable(dep); 69172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 69272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 69372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 69472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 69572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 69672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic struct usb_request *dwc3_gadget_ep_alloc_request(struct usb_ep *ep, 69772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi gfp_t gfp_flags) 69872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 69972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req; 70072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = to_dwc3_ep(ep); 70172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 70272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 70372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req = kzalloc(sizeof(*req), gfp_flags); 70472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!req) { 70572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "not enough memory\n"); 70672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return NULL; 70772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 70872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 70972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->epnum = dep->number; 71072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->dep = dep; 71172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 71272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return &req->request; 71372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 71472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 71572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_ep_free_request(struct usb_ep *ep, 71672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct usb_request *request) 71772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 71872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req = to_dwc3_request(request); 71972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 72072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi kfree(req); 72172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 72272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 723c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi/** 724c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi * dwc3_prepare_one_trb - setup one TRB from one request 725c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi * @dep: endpoint for which this request is prepared 726c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi * @req: dwc3_request pointer 727c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi */ 72868e823e24aea5227eaf20d6435485e733109d113Felipe Balbistatic void dwc3_prepare_one_trb(struct dwc3_ep *dep, 729eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi struct dwc3_request *req, dma_addr_t dma, 730eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi unsigned length, unsigned last, unsigned chain) 731c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi{ 732eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi struct dwc3 *dwc = dep->dwc; 733f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi struct dwc3_trb *trb; 734c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 735c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi unsigned int cur_slot; 736c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 737eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dev_vdbg(dwc->dev, "%s: req %p dma %08llx length %d%s%s\n", 738eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dep->name, req, (unsigned long long) dma, 739eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi length, last ? " last" : "", 740eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi chain ? " chain" : ""); 741eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi 742f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb = &dep->trb_pool[dep->free_slot & DWC3_TRB_MASK]; 743c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi cur_slot = dep->free_slot; 744c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi dep->free_slot++; 745c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 746c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi /* Skip the LINK-TRB on ISOC */ 747c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi if (((cur_slot & DWC3_TRB_MASK) == DWC3_TRB_NUM - 1) && 74816e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz usb_endpoint_xfer_isoc(dep->endpoint.desc)) 74968e823e24aea5227eaf20d6435485e733109d113Felipe Balbi return; 750c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 751eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (!req->trb) { 752eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dwc3_gadget_move_request_queued(req); 753f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi req->trb = trb; 754f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi req->trb_dma = dwc3_trb_dma_offset(dep, trb); 755eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi } 756c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 757f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->size = DWC3_TRB_SIZE_LENGTH(length); 758f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->bpl = lower_32_bits(dma); 759f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->bph = upper_32_bits(dma); 760c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 76116e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz switch (usb_endpoint_type(dep->endpoint.desc)) { 762c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi case USB_ENDPOINT_XFER_CONTROL: 763f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->ctrl = DWC3_TRBCTL_CONTROL_SETUP; 764c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi break; 765c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 766c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi case USB_ENDPOINT_XFER_ISOC: 767f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->ctrl = DWC3_TRBCTL_ISOCHRONOUS_FIRST; 768c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 769c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi /* IOC every DWC3_TRB_NUM / 4 so we can refill */ 770c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi if (!(cur_slot % (DWC3_TRB_NUM / 4))) 771f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->ctrl |= DWC3_TRB_CTRL_IOC; 772c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi break; 773c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 774c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi case USB_ENDPOINT_XFER_BULK: 775c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi case USB_ENDPOINT_XFER_INT: 776f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->ctrl = DWC3_TRBCTL_NORMAL; 777c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi break; 778c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi default: 779c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi /* 780c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi * This is only possible with faulty memory because we 781c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi * checked it already :) 782c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi */ 783c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi BUG(); 784c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi } 785c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 78616e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if (usb_endpoint_xfer_isoc(dep->endpoint.desc)) { 787f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->ctrl |= DWC3_TRB_CTRL_ISP_IMI; 788f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->ctrl |= DWC3_TRB_CTRL_CSP; 789f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi } else { 790f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi if (chain) 791f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->ctrl |= DWC3_TRB_CTRL_CHN; 792f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi 793f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi if (last) 794f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->ctrl |= DWC3_TRB_CTRL_LST; 795f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi } 796c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 79716e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if (usb_endpoint_xfer_bulk(dep->endpoint.desc) && dep->stream_capable) 798f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->ctrl |= DWC3_TRB_CTRL_SID_SOFN(req->request.stream_id); 799c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 800f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb->ctrl |= DWC3_TRB_CTRL_HWO; 801c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi} 802c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 80372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* 80472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * dwc3_prepare_trbs - setup TRBs from requests 80572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * @dep: endpoint for which requests are being prepared 80672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * @starting: true if the endpoint is idle and no requests are queued. 80772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 8081d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * The function goes through the requests list and sets up TRBs for the 8091d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * transfers. The function returns once there are no more TRBs available or 8101d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * it runs out of requests. 81172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 81268e823e24aea5227eaf20d6435485e733109d113Felipe Balbistatic void dwc3_prepare_trbs(struct dwc3_ep *dep, bool starting) 81372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 81468e823e24aea5227eaf20d6435485e733109d113Felipe Balbi struct dwc3_request *req, *n; 81572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 trbs_left; 8168d62cd65d74d0e241b3a152f7347bb66126b705bPaul Zimmerman u32 max; 817c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi unsigned int last_one = 0; 81872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 81972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi BUILD_BUG_ON_NOT_POWER_OF_2(DWC3_TRB_NUM); 82072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 82172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* the first request must not be queued */ 82272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trbs_left = (dep->busy_slot - dep->free_slot) & DWC3_TRB_MASK; 823c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 8248d62cd65d74d0e241b3a152f7347bb66126b705bPaul Zimmerman /* Can't wrap around on a non-isoc EP since there's no link TRB */ 82516e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if (!usb_endpoint_xfer_isoc(dep->endpoint.desc)) { 8268d62cd65d74d0e241b3a152f7347bb66126b705bPaul Zimmerman max = DWC3_TRB_NUM - (dep->free_slot & DWC3_TRB_MASK); 8278d62cd65d74d0e241b3a152f7347bb66126b705bPaul Zimmerman if (trbs_left > max) 8288d62cd65d74d0e241b3a152f7347bb66126b705bPaul Zimmerman trbs_left = max; 8298d62cd65d74d0e241b3a152f7347bb66126b705bPaul Zimmerman } 8308d62cd65d74d0e241b3a152f7347bb66126b705bPaul Zimmerman 83172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 8321d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * If busy & slot are equal than it is either full or empty. If we are 8331d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * starting to process requests then we are empty. Otherwise we are 83472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * full and don't do anything 83572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 83672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!trbs_left) { 83772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!starting) 83868e823e24aea5227eaf20d6435485e733109d113Felipe Balbi return; 83972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trbs_left = DWC3_TRB_NUM; 84072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 84172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * In case we start from scratch, we queue the ISOC requests 84272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * starting from slot 1. This is done because we use ring 84372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * buffer and have no LST bit to stop us. Instead, we place 8441d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * IOC bit every TRB_NUM/4. We try to avoid having an interrupt 84572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * after the first request so we start at slot 1 and have 84672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 7 requests proceed before we hit the first IOC. 84772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Other transfer types don't use the ring buffer and are 84872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * processed from the first TRB until the last one. Since we 84972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * don't wrap around we have to start at the beginning. 85072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 85116e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if (usb_endpoint_xfer_isoc(dep->endpoint.desc)) { 85272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->busy_slot = 1; 85372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->free_slot = 1; 85472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 85572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->busy_slot = 0; 85672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->free_slot = 0; 85772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 85872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 85972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 86072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* The last TRB is a link TRB, not used for xfer */ 86116e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if ((trbs_left <= 1) && usb_endpoint_xfer_isoc(dep->endpoint.desc)) 86268e823e24aea5227eaf20d6435485e733109d113Felipe Balbi return; 86372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 86472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_for_each_entry_safe(req, n, &dep->request_list, list) { 865eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi unsigned length; 866eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dma_addr_t dma; 86772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 868eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (req->request.num_mapped_sgs > 0) { 869eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi struct usb_request *request = &req->request; 870eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi struct scatterlist *sg = request->sg; 871eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi struct scatterlist *s; 872eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi int i; 87372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 874eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi for_each_sg(sg, s, request->num_mapped_sgs, i) { 875eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi unsigned chain = true; 87672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 877eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi length = sg_dma_len(s); 878eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dma = sg_dma_address(s); 87972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 8801d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman if (i == (request->num_mapped_sgs - 1) || 8811d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman sg_is_last(s)) { 882eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi last_one = true; 883eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi chain = false; 884eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi } 88572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 886eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi trbs_left--; 887eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (!trbs_left) 888eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi last_one = true; 88972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 890eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (last_one) 891eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi chain = false; 89272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 893eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dwc3_prepare_one_trb(dep, req, dma, length, 894eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi last_one, chain); 89572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 896eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (last_one) 897eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi break; 898eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi } 89972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 900eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dma = req->request.dma; 901eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi length = req->request.length; 902eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi trbs_left--; 90372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 904eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (!trbs_left) 905eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi last_one = 1; 906879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi 907eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi /* Is this the last request? */ 908eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (list_is_last(&req->list, &dep->request_list)) 909eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi last_one = 1; 91072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 911eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dwc3_prepare_one_trb(dep, req, dma, length, 912eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi last_one, false); 91372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 914eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (last_one) 915eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi break; 91672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 91772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 91872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 91972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 92072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int __dwc3_gadget_kick_transfer(struct dwc3_ep *dep, u16 cmd_param, 92172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int start_new) 92272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 92372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 92472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req; 92572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 92672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 92772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 cmd; 92872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 92972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (start_new && (dep->flags & DWC3_EP_BUSY)) { 93072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s: endpoint busy\n", dep->name); 93172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EBUSY; 93272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 93372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags &= ~DWC3_EP_PENDING_REQUEST; 93472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 93572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 93672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * If we are getting here after a short-out-packet we don't enqueue any 93772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * new requests as we try to set the IOC bit only on the last request. 93872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 93972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (start_new) { 94072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (list_empty(&dep->req_queued)) 94172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_prepare_trbs(dep, start_new); 94272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 94372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* req points to the first request which will be sent */ 94472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req = next_request(&dep->req_queued); 94572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 94668e823e24aea5227eaf20d6435485e733109d113Felipe Balbi dwc3_prepare_trbs(dep, start_new); 94768e823e24aea5227eaf20d6435485e733109d113Felipe Balbi 94872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 9491d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * req points to the first request where HWO changed from 0 to 1 95072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 95168e823e24aea5227eaf20d6435485e733109d113Felipe Balbi req = next_request(&dep->req_queued); 95272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 95372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!req) { 95472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags |= DWC3_EP_PENDING_REQUEST; 95572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 95672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 95772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 95872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0, sizeof(params)); 959dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param0 = upper_32_bits(req->trb_dma); 960dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param1 = lower_32_bits(req->trb_dma); 96172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 96272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (start_new) 96372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd = DWC3_DEPCMD_STARTTRANSFER; 96472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi else 96572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd = DWC3_DEPCMD_UPDATETRANSFER; 96672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 96772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd |= DWC3_DEPCMD_PARAM(cmd_param); 96872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, cmd, ¶ms); 96972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret < 0) { 97072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "failed to send STARTTRANSFER command\n"); 97172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 97272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 97372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * FIXME we need to iterate over the list of requests 97472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * here and stop, unmap, free and del each of the linked 9751d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * requests instead of what we do now. 97672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 9770fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi usb_gadget_unmap_request(&dwc->gadget, &req->request, 9780fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi req->direction); 97972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_del(&req->list); 98072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 98172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 98272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 98372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags |= DWC3_EP_BUSY; 98425b8ff68bf1d4954d4a9dcb4862c6b6a53cb09e2Felipe Balbi 985f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman if (start_new) { 986f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman dep->res_trans_idx = dwc3_gadget_ep_get_transfer_index(dwc, 987f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman dep->number); 988f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman WARN_ON_ONCE(!dep->res_trans_idx); 989f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman } 99025b8ff68bf1d4954d4a9dcb4862c6b6a53cb09e2Felipe Balbi 99172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 99272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 99372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 99472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int __dwc3_gadget_ep_queue(struct dwc3_ep *dep, struct dwc3_request *req) 99572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 9960fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi struct dwc3 *dwc = dep->dwc; 9970fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi int ret; 9980fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi 99972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.actual = 0; 100072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.status = -EINPROGRESS; 100172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->direction = dep->direction; 100272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->epnum = dep->number; 100372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 100472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 100572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We only add to our list of requests now and 100672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * start consuming the list once we get XferNotReady 100772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * IRQ. 100872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 100972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * That way, we avoid doing anything that we don't need 101072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * to do now and defer it until the point we receive a 101172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * particular token from the Host side. 101272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 101372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * This will also avoid Host cancelling URBs due to too 10141d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * many NAKs. 101572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 10160fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi ret = usb_gadget_map_request(&dwc->gadget, &req->request, 10170fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi dep->direction); 10180fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi if (ret) 10190fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi return ret; 10200fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi 102172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_add_tail(&req->list, &dep->request_list); 102272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 102323063b378de734383c9f42de770b01cd661cd9b4Greg Kroah-Hartman if (usb_endpoint_xfer_isoc(dep->endpoint.desc) && (dep->flags & DWC3_EP_BUSY)) 1024f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman dep->flags |= DWC3_EP_PENDING_REQUEST; 1025f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman 102672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 1027f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman * There are two special cases: 102872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 1029f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman * 1. XferNotReady with empty list of requests. We need to kick the 1030f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman * transfer here in that situation, otherwise we will be NAKing 1031f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman * forever. If we get XferNotReady before gadget driver has a 1032f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman * chance to queue a request, we will ACK the IRQ but won't be 1033f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman * able to receive the data until the next request is queued. 1034f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman * The following code is handling exactly that. 103572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 1036f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman * 2. XferInProgress on Isoc EP with an active transfer. We need to 1037f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman * kick the transfer here after queuing a request, otherwise the 1038f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman * core may not see the modified TRB(s). 103972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 104072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->flags & DWC3_EP_PENDING_REQUEST) { 1041f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman int ret; 1042f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman int start_trans = 1; 1043f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman u8 trans_idx = dep->res_trans_idx; 104472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 104516e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if (usb_endpoint_xfer_isoc(dep->endpoint.desc) && 1046f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman (dep->flags & DWC3_EP_BUSY)) { 104772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi start_trans = 0; 1048f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman WARN_ON_ONCE(!trans_idx); 1049f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman } else { 1050f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman trans_idx = 0; 1051f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman } 105272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1053f898ae09a043cf9c3c4be82c04e08fcf00fe82c1Paul Zimmerman ret = __dwc3_gadget_kick_transfer(dep, trans_idx, start_trans); 105472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret && ret != -EBUSY) { 105572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 105672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 105772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "%s: failed to kick transfers\n", 105872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 105972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 1060a092532483e3200a53c8b1170b3988cc668c07efFelipe Balbi } 106172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 106272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 106372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 106472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 106572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_queue(struct usb_ep *ep, struct usb_request *request, 106672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi gfp_t gfp_flags) 106772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 106872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req = to_dwc3_request(request); 106972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = to_dwc3_ep(ep); 107072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 107172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 107272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 107372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 107472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 107572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 107616e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if (!dep->endpoint.desc) { 107772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "trying to queue request %p to disabled %s\n", 107872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi request, ep->name); 107972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -ESHUTDOWN; 108072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 108172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 108272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "queing request %p to %s length %d\n", 108372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi request, ep->name, request->length); 108472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 108572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 108672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = __dwc3_gadget_ep_queue(dep, req); 108772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 108872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 108972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 109072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 109172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 109272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_dequeue(struct usb_ep *ep, 109372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct usb_request *request) 109472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 109572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req = to_dwc3_request(request); 109672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *r = NULL; 109772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 109872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = to_dwc3_ep(ep); 109972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 110072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 110172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 110272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret = 0; 110372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 110472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 110572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 110672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_for_each_entry(r, &dep->request_list, list) { 110772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (r == req) 110872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 110972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 111072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 111172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (r != req) { 111272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_for_each_entry(r, &dep->req_queued, list) { 111372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (r == req) 111472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 111572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 111672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (r == req) { 111772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* wait until it is processed */ 111872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_stop_active_transfer(dwc, dep->number); 111972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto out0; 112072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 112172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "request %p was not queued to %s\n", 112272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi request, ep->name); 112372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EINVAL; 112472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto out0; 112572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 112672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 112772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* giveback the request */ 112872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_giveback(dep, req, -ECONNRESET); 112972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 113072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiout0: 113172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 113272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 113372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 113472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 113572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 113672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiint __dwc3_gadget_ep_set_halt(struct dwc3_ep *dep, int value) 113772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 113872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 113972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 114072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 114172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 114272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0x00, sizeof(params)); 114372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 114472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (value) { 11450b7836a9eb32f626ffd3fe3045e8c618cb8ed965Felipe Balbi if (dep->number == 0 || dep->number == 1) { 11460b7836a9eb32f626ffd3fe3045e8c618cb8ed965Felipe Balbi /* 11470b7836a9eb32f626ffd3fe3045e8c618cb8ed965Felipe Balbi * Whenever EP0 is stalled, we will restart 11480b7836a9eb32f626ffd3fe3045e8c618cb8ed965Felipe Balbi * the state machine, thus moving back to 11490b7836a9eb32f626ffd3fe3045e8c618cb8ed965Felipe Balbi * Setup Phase 11500b7836a9eb32f626ffd3fe3045e8c618cb8ed965Felipe Balbi */ 11510b7836a9eb32f626ffd3fe3045e8c618cb8ed965Felipe Balbi dwc->ep0state = EP0_SETUP_PHASE; 11520b7836a9eb32f626ffd3fe3045e8c618cb8ed965Felipe Balbi } 115372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 115472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, 115572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEPCMD_SETSTALL, ¶ms); 115672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 115772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to %s STALL on %s\n", 115872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi value ? "set" : "clear", 115972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 116072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi else 116172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags |= DWC3_EP_STALL; 116272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 11635275455a6e6ae6b57303834b0afd267bb9657ffcPaul Zimmerman if (dep->flags & DWC3_EP_WEDGE) 11645275455a6e6ae6b57303834b0afd267bb9657ffcPaul Zimmerman return 0; 11655275455a6e6ae6b57303834b0afd267bb9657ffcPaul Zimmerman 116672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, 116772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEPCMD_CLEARSTALL, ¶ms); 116872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 116972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to %s STALL on %s\n", 117072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi value ? "set" : "clear", 117172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 117272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi else 117372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags &= ~DWC3_EP_STALL; 117472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 11755275455a6e6ae6b57303834b0afd267bb9657ffcPaul Zimmerman 117672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 117772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 117872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 117972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_set_halt(struct usb_ep *ep, int value) 118072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 118172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = to_dwc3_ep(ep); 118272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 118372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 118472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 118572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 118672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 118772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 118872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 118972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 119016e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if (usb_endpoint_xfer_isoc(dep->endpoint.desc)) { 119172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "%s is of Isochronous type\n", dep->name); 119272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EINVAL; 119372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto out; 119472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 119572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 119672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = __dwc3_gadget_ep_set_halt(dep, value); 119772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiout: 119872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 119972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 120072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 120172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 120272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 120372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_set_wedge(struct usb_ep *ep) 120472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 120572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = to_dwc3_ep(ep); 1206249a456930cd2df29d085fb738b0e8f4bc1680cfPaul Zimmerman struct dwc3 *dwc = dep->dwc; 1207249a456930cd2df29d085fb738b0e8f4bc1680cfPaul Zimmerman unsigned long flags; 120872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1209249a456930cd2df29d085fb738b0e8f4bc1680cfPaul Zimmerman spin_lock_irqsave(&dwc->lock, flags); 121072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags |= DWC3_EP_WEDGE; 1211249a456930cd2df29d085fb738b0e8f4bc1680cfPaul Zimmerman spin_unlock_irqrestore(&dwc->lock, flags); 121272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 12135275455a6e6ae6b57303834b0afd267bb9657ffcPaul Zimmerman return dwc3_gadget_ep_set_halt(ep, 1); 121472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 121572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 121672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 121772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 121872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic struct usb_endpoint_descriptor dwc3_gadget_ep0_desc = { 121972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .bLength = USB_DT_ENDPOINT_SIZE, 122072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .bDescriptorType = USB_DT_ENDPOINT, 122172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .bmAttributes = USB_ENDPOINT_XFER_CONTROL, 122272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi}; 122372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 122472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic const struct usb_ep_ops dwc3_gadget_ep0_ops = { 122572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .enable = dwc3_gadget_ep0_enable, 122672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .disable = dwc3_gadget_ep0_disable, 122772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .alloc_request = dwc3_gadget_ep_alloc_request, 122872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .free_request = dwc3_gadget_ep_free_request, 122972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .queue = dwc3_gadget_ep0_queue, 123072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .dequeue = dwc3_gadget_ep_dequeue, 123172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .set_halt = dwc3_gadget_ep_set_halt, 123272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .set_wedge = dwc3_gadget_ep_set_wedge, 123372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi}; 123472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 123572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic const struct usb_ep_ops dwc3_gadget_ep_ops = { 123672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .enable = dwc3_gadget_ep_enable, 123772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .disable = dwc3_gadget_ep_disable, 123872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .alloc_request = dwc3_gadget_ep_alloc_request, 123972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .free_request = dwc3_gadget_ep_free_request, 124072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .queue = dwc3_gadget_ep_queue, 124172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .dequeue = dwc3_gadget_ep_dequeue, 124272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .set_halt = dwc3_gadget_ep_set_halt, 124372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .set_wedge = dwc3_gadget_ep_set_wedge, 124472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi}; 124572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 124672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 124772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 124872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_get_frame(struct usb_gadget *g) 124972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 125072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 125172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 125272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 125372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 125472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return DWC3_DSTS_SOFFN(reg); 125572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 125672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 125772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_wakeup(struct usb_gadget *g) 125872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 125972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 126072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 126172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long timeout; 126272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 126372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 126472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 126572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 126672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret = 0; 126772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 126872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 link_state; 126972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 speed; 127072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 127172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 127272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 127372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 127472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * According to the Databook Remote wakeup request should 127572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * be issued only when the device is in early suspend state. 127672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 127772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We can check that via USB Link State bits in DSTS register. 127872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 127972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 128072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 128172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi speed = reg & DWC3_DSTS_CONNECTSPD; 128272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (speed == DWC3_DSTS_SUPERSPEED) { 128372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "no wakeup on SuperSpeed\n"); 128472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EINVAL; 128572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto out; 128672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 128772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 128872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi link_state = DWC3_DSTS_USBLNKST(reg); 128972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 129072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (link_state) { 129172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_LINK_STATE_RX_DET: /* in HS, means Early Suspend */ 129272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_LINK_STATE_U3: /* in HS, means SUSPEND */ 129372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 129472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 129572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "can't wakeup from link state %d\n", 129672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi link_state); 129772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EINVAL; 129872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto out; 129972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 130072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 13018598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi ret = dwc3_gadget_set_link_state(dwc, DWC3_LINK_STATE_RECOV); 13028598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi if (ret < 0) { 13038598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi dev_err(dwc->dev, "failed to put link in Recovery\n"); 13048598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi goto out; 13058598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi } 130672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1307802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman /* Recent versions do this automatically */ 1308802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman if (dwc->revision < DWC3_REVISION_194A) { 1309802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman /* write zeroes to Link Change Request */ 1310802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman reg &= ~DWC3_DCTL_ULSTCHNGREQ_MASK; 1311802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman dwc3_writel(dwc->regs, DWC3_DCTL, reg); 1312802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman } 131372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 13141d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman /* poll until Link State changes to ON */ 131572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi timeout = jiffies + msecs_to_jiffies(100); 131672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 13171d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman while (!time_after(jiffies, timeout)) { 131872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 131972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 132072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* in HS, means ON */ 132172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (DWC3_DSTS_USBLNKST(reg) == DWC3_LINK_STATE_U0) 132272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 132372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 132472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 132572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (DWC3_DSTS_USBLNKST(reg) != DWC3_LINK_STATE_U0) { 132672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to send remote wakeup\n"); 132772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EINVAL; 132872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 132972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 133072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiout: 133172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 133272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 133372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 133472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 133572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 133672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_set_selfpowered(struct usb_gadget *g, 133772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int is_selfpowered) 133872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 133972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 1340249a456930cd2df29d085fb738b0e8f4bc1680cfPaul Zimmerman unsigned long flags; 134172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1342249a456930cd2df29d085fb738b0e8f4bc1680cfPaul Zimmerman spin_lock_irqsave(&dwc->lock, flags); 134372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->is_selfpowered = !!is_selfpowered; 1344249a456930cd2df29d085fb738b0e8f4bc1680cfPaul Zimmerman spin_unlock_irqrestore(&dwc->lock, flags); 134572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 134672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 134772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 134872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 134972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_run_stop(struct dwc3 *dwc, int is_on) 135072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 135172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 135261d58242f634642de42d6a4098913b7254a65053Sebastian Andrzej Siewior u32 timeout = 500; 135372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 135472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 13558db7ed15f2557e26371e4b2d98fee290d992b715Felipe Balbi if (is_on) { 1356802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman if (dwc->revision <= DWC3_REVISION_187A) { 1357802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman reg &= ~DWC3_DCTL_TRGTULST_MASK; 1358802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman reg |= DWC3_DCTL_TRGTULST_RX_DET; 1359802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman } 1360802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman 1361802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman if (dwc->revision >= DWC3_REVISION_194A) 1362802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman reg &= ~DWC3_DCTL_KEEP_CONNECT; 1363802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman reg |= DWC3_DCTL_RUN_STOP; 13648db7ed15f2557e26371e4b2d98fee290d992b715Felipe Balbi } else { 136572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DCTL_RUN_STOP; 13668db7ed15f2557e26371e4b2d98fee290d992b715Felipe Balbi } 136772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 136872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 136972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 137072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi do { 137172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 137272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (is_on) { 137372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(reg & DWC3_DSTS_DEVCTRLHLT)) 137472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 137572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 137672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (reg & DWC3_DSTS_DEVCTRLHLT) 137772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 137872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 137972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi timeout--; 138072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!timeout) 138172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 138261d58242f634642de42d6a4098913b7254a65053Sebastian Andrzej Siewior udelay(1); 138372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } while (1); 138472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 138572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "gadget %s data soft-%s\n", 138672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver 138772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ? dwc->gadget_driver->function : "no-function", 138872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi is_on ? "connect" : "disconnect"); 138972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 139072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 139172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_pullup(struct usb_gadget *g, int is_on) 139272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 139372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 139472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 139572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 139672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi is_on = !!is_on; 139772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 139872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 139972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_run_stop(dwc, is_on); 140072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 140172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 140272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 140372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 140472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 140572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_start(struct usb_gadget *g, 140672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct usb_gadget_driver *driver) 140772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 140872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 140972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 141072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 141172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret = 0; 141272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 141372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 141472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 141572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 141672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dwc->gadget_driver) { 141772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "%s is already bound to %s\n", 141872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.name, 141972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver->driver.name); 142072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EBUSY; 142172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto err0; 142272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 142372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 142472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver = driver; 142572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.dev.driver = &driver->driver; 142672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 142772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCFG); 142872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~(DWC3_DCFG_SPEED_MASK); 142907e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi 143007e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi /** 143107e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * WORKAROUND: DWC3 revision < 2.20a have an issue 143207e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * which would cause metastability state on Run/Stop 143307e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * bit if we try to force the IP to USB2-only mode. 143407e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * 143507e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * Because of that, we cannot configure the IP to any 143607e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * speed other than the SuperSpeed 143707e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * 143807e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * Refers to: 143907e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * 144007e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * STAR#9000525659: Clock Domain Crossing on DCTL in 144107e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi * USB 2.0 Mode 144207e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi */ 144307e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi if (dwc->revision < DWC3_REVISION_220A) 144407e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi reg |= DWC3_DCFG_SUPERSPEED; 144507e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi else 144607e7f47b6d8da3e290f90615c9a74dff0115709eFelipe Balbi reg |= dwc->maximum_speed; 144772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCFG, reg); 144872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1449b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman dwc->start_config_issued = false; 1450b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman 145172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* Start with SuperSpeed Default */ 145272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(512); 145372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 145472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[0]; 1455c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL); 145672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 145772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to enable %s\n", dep->name); 145872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto err0; 145972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 146072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 146172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[1]; 1462c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL); 146372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 146472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to enable %s\n", dep->name); 146572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto err1; 146672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 146772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 146872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* begin to receive SETUP packets */ 1469c7fcdeb2627c46b7ec3f0bcb2054b10405f9a70eFelipe Balbi dwc->ep0state = EP0_SETUP_PHASE; 147072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_ep0_out_start(dwc); 147172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 147272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 147372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 147472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 147572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 147672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbierr1: 147772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi __dwc3_gadget_ep_disable(dwc->eps[0]); 147872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 147972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbierr0: 148072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 148172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 148272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 148372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 148472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 148572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_stop(struct usb_gadget *g, 148672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct usb_gadget_driver *driver) 148772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 148872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 148972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 149072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 149172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 149272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 149372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi __dwc3_gadget_ep_disable(dwc->eps[0]); 149472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi __dwc3_gadget_ep_disable(dwc->eps[1]); 149572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 149672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver = NULL; 149772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.dev.driver = NULL; 149872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 149972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 150072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 150172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 150272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 1503802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman 150472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic const struct usb_gadget_ops dwc3_gadget_ops = { 150572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .get_frame = dwc3_gadget_get_frame, 150672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .wakeup = dwc3_gadget_wakeup, 150772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .set_selfpowered = dwc3_gadget_set_selfpowered, 150872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .pullup = dwc3_gadget_pullup, 150972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .udc_start = dwc3_gadget_start, 151072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .udc_stop = dwc3_gadget_stop, 151172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi}; 151272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 151372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 151472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 151572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int __devinit dwc3_gadget_init_endpoints(struct dwc3 *dwc) 151672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 151772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 151872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 epnum; 151972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 152072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi INIT_LIST_HEAD(&dwc->gadget.ep_list); 152172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 152272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi for (epnum = 0; epnum < DWC3_ENDPOINTS_NUM; epnum++) { 152372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = kzalloc(sizeof(*dep), GFP_KERNEL); 152472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dep) { 152572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "can't allocate endpoint %d\n", 152672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi epnum); 152772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -ENOMEM; 152872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 152972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 153072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->dwc = dwc; 153172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->number = epnum; 153272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->eps[epnum] = dep; 153372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 153472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi snprintf(dep->name, sizeof(dep->name), "ep%d%s", epnum >> 1, 153572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi (epnum & 1) ? "in" : "out"); 153672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->endpoint.name = dep->name; 153772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->direction = (epnum & 1); 153872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 153972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (epnum == 0 || epnum == 1) { 154072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->endpoint.maxpacket = 512; 154172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->endpoint.ops = &dwc3_gadget_ep0_ops; 154272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!epnum) 154372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ep0 = &dep->endpoint; 154472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 154572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 154672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 154772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->endpoint.maxpacket = 1024; 154812d36c16bde3ee0643d705caa87723de536dbe49Sebastian Andrzej Siewior dep->endpoint.max_streams = 15; 154972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->endpoint.ops = &dwc3_gadget_ep_ops; 155072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_add_tail(&dep->endpoint.ep_list, 155172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi &dwc->gadget.ep_list); 155272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 155372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_alloc_trb_pool(dep); 155425b8ff68bf1d4954d4a9dcb4862c6b6a53cb09e2Felipe Balbi if (ret) 155572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 155672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 155725b8ff68bf1d4954d4a9dcb4862c6b6a53cb09e2Felipe Balbi 155872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi INIT_LIST_HEAD(&dep->request_list); 155972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi INIT_LIST_HEAD(&dep->req_queued); 156072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 156172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 156272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 156372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 156472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 156572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_free_endpoints(struct dwc3 *dwc) 156672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 156772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 156872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 epnum; 156972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 157072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi for (epnum = 0; epnum < DWC3_ENDPOINTS_NUM; epnum++) { 157172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[epnum]; 157272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_free_trb_pool(dep); 157372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 157472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (epnum != 0 && epnum != 1) 157572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_del(&dep->endpoint.ep_list); 157672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 157772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi kfree(dep); 157872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 157972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 158072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 158172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_release(struct device *dev) 158272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 158372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dev, "%s\n", __func__); 158472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 158572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 158672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 158772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_cleanup_done_reqs(struct dwc3 *dwc, struct dwc3_ep *dep, 158872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct dwc3_event_depevt *event, int status) 158972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 159072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req; 1591f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi struct dwc3_trb *trb; 159272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned int count; 159372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned int s_pkt = 0; 159472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 159572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi do { 159672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req = next_request(&dep->req_queued); 1597d39ee7be2aaf0a53d7b5f43c13571bac95f7cc0cSebastian Andrzej Siewior if (!req) { 1598d39ee7be2aaf0a53d7b5f43c13571bac95f7cc0cSebastian Andrzej Siewior WARN_ON_ONCE(1); 1599d39ee7be2aaf0a53d7b5f43c13571bac95f7cc0cSebastian Andrzej Siewior return 1; 1600d39ee7be2aaf0a53d7b5f43c13571bac95f7cc0cSebastian Andrzej Siewior } 160172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1602f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi trb = req->trb; 160372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1604f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi if ((trb->ctrl & DWC3_TRB_CTRL_HWO) && status != -ESHUTDOWN) 16050d2f4758530d1598087d1d2f3e75b4f7d17fc6c7Sebastian Andrzej Siewior /* 16060d2f4758530d1598087d1d2f3e75b4f7d17fc6c7Sebastian Andrzej Siewior * We continue despite the error. There is not much we 16071d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * can do. If we don't clean it up we loop forever. If 16081d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * we skip the TRB then it gets overwritten after a 16091d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * while since we use them in a ring buffer. A BUG() 16101d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * would help. Lets hope that if this occurs, someone 16110d2f4758530d1598087d1d2f3e75b4f7d17fc6c7Sebastian Andrzej Siewior * fixes the root cause instead of looking away :) 16120d2f4758530d1598087d1d2f3e75b4f7d17fc6c7Sebastian Andrzej Siewior */ 161372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "%s's TRB (%p) still owned by HW\n", 161472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name, req->trb); 1615f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi count = trb->size & DWC3_TRB_SIZE_MASK; 161672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 161772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->direction) { 161872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (count) { 161972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "incomplete IN transfer %s\n", 162072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 162172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi status = -ECONNRESET; 162272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 162372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 162472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (count && (event->status & DEPEVT_STATUS_SHORT)) 162572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi s_pkt = 1; 162672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 162772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 162872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 162972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We assume here we will always receive the entire data block 163072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * which we should receive. Meaning, if we program RX to 163172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * receive 4K but we receive only 2K, we assume that's all we 163272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * should receive and we simply bounce the request back to the 163372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * gadget driver for further processing. 163472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 163572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.actual += req->request.length - count; 163672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_giveback(dep, req, status); 163772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (s_pkt) 163872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 1639f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi if ((event->status & DEPEVT_STATUS_LST) && 1640f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi (trb->ctrl & DWC3_TRB_CTRL_LST)) 164172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 1642f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi if ((event->status & DEPEVT_STATUS_IOC) && 1643f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi (trb->ctrl & DWC3_TRB_CTRL_IOC)) 164472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 164572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } while (1); 164672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1647f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi if ((event->status & DEPEVT_STATUS_IOC) && 1648f6bafc6a1c9d58f0c234ac5052b9c09b0747348cFelipe Balbi (trb->ctrl & DWC3_TRB_CTRL_IOC)) 164972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 165072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 1; 165172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 165272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 165372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_endpoint_transfer_complete(struct dwc3 *dwc, 165472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep, const struct dwc3_event_depevt *event, 165572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int start_new) 165672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 165772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned status = 0; 165872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int clean_busy; 165972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 166072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (event->status & DEPEVT_STATUS_BUSERR) 166172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi status = -ECONNRESET; 166272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 16631d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman clean_busy = dwc3_cleanup_done_reqs(dwc, dep, event, status); 1664c2df85ca31645ed3c68c56bd30a3673e034224f1Paul Zimmerman if (clean_busy) 166572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags &= ~DWC3_EP_BUSY; 1666fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1667fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi /* 1668fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * WORKAROUND: This is the 2nd half of U1/U2 -> U0 workaround. 1669fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * See dwc3_gadget_linksts_change_interrupt() for 1st half. 1670fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi */ 1671fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi if (dwc->revision < DWC3_REVISION_183A) { 1672fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi u32 reg; 1673fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi int i; 1674fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1675fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi for (i = 0; i < DWC3_ENDPOINTS_NUM; i++) { 1676fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi struct dwc3_ep *dep = dwc->eps[i]; 1677fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1678fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) 1679fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi continue; 1680fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1681fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi if (!list_empty(&dep->req_queued)) 1682fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi return; 1683fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi } 1684fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1685fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 1686fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi reg |= dwc->u1u2; 1687fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 1688fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1689fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi dwc->u1u2 = 0; 1690fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi } 169172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 169272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 169372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_start_isoc(struct dwc3 *dwc, 169472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep, const struct dwc3_event_depevt *event) 169572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 16969bafa56c7cee5c6fa68de5924220abb220c7e229Paul Zimmerman u32 uf, mask; 169772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 169872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (list_empty(&dep->request_list)) { 169972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "ISOC ep %s run out for requests.\n", 170072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 170172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 170272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 170372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 17049bafa56c7cee5c6fa68de5924220abb220c7e229Paul Zimmerman mask = ~(dep->interval - 1); 17059bafa56c7cee5c6fa68de5924220abb220c7e229Paul Zimmerman uf = event->parameters & mask; 17069bafa56c7cee5c6fa68de5924220abb220c7e229Paul Zimmerman /* 4 micro frames in the future */ 17079bafa56c7cee5c6fa68de5924220abb220c7e229Paul Zimmerman uf += dep->interval * 4; 170872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 170972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi __dwc3_gadget_kick_transfer(dep, uf, 1); 171072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 171172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 171272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_process_ep_cmd_complete(struct dwc3_ep *dep, 171372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct dwc3_event_depevt *event) 171472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 171572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 171672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_event_depevt mod_ev = *event; 171772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 171872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 17191d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * We were asked to remove one request. It is possible that this 17201d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * request and a few others were started together and have the same 172172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * transfer index. Since we stopped the complete endpoint we don't 172272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * know how many requests were already completed (and not yet) 172372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * reported and how could be done (later). We purge them all until 172472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * the end of the list. 172572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 172672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi mod_ev.status = DEPEVT_STATUS_LST; 172772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_cleanup_done_reqs(dwc, dep, &mod_ev, -ESHUTDOWN); 172872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags &= ~DWC3_EP_BUSY; 17291d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman /* pending requests are ignored and are queued on XferNotReady */ 173072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 173172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 173272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_ep_cmd_compl(struct dwc3_ep *dep, 173372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct dwc3_event_depevt *event) 173472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 173572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 param = event->parameters; 173672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 cmd_type = (param >> 8) & ((1 << 5) - 1); 173772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 173872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (cmd_type) { 173972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_ENDTRANSFER: 174072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_process_ep_cmd_complete(dep, event); 174172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 174272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_STARTTRANSFER: 174372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->res_trans_idx = param & 0x7f; 174472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 174572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 174672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi printk(KERN_ERR "%s() unknown /unexpected type: %d\n", 174772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi __func__, cmd_type); 174872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 174972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi }; 175072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 175172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 175272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_endpoint_interrupt(struct dwc3 *dwc, 175372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct dwc3_event_depevt *event) 175472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 175572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 175672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 epnum = event->endpoint_number; 175772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 175872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[epnum]; 175972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 176072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s: %s\n", dep->name, 176172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_ep_event_string(event->endpoint_event)); 176272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 176372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (epnum == 0 || epnum == 1) { 176472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_ep0_interrupt(dwc, event); 176572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 176672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 176772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 176872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (event->endpoint_event) { 176972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPEVT_XFERCOMPLETE: 1770c2df85ca31645ed3c68c56bd30a3673e034224f1Paul Zimmerman dep->res_trans_idx = 0; 1771c2df85ca31645ed3c68c56bd30a3673e034224f1Paul Zimmerman 177216e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if (usb_endpoint_xfer_isoc(dep->endpoint.desc)) { 177372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "%s is an Isochronous endpoint\n", 177472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 177572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 177672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 177772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 177872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_endpoint_transfer_complete(dwc, dep, event, 1); 177972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 178072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPEVT_XFERINPROGRESS: 178116e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if (!usb_endpoint_xfer_isoc(dep->endpoint.desc)) { 178272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "%s is not an Isochronous endpoint\n", 178372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 178472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 178572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 178672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 178772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_endpoint_transfer_complete(dwc, dep, event, 0); 178872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 178972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPEVT_XFERNOTREADY: 179016e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if (usb_endpoint_xfer_isoc(dep->endpoint.desc)) { 179172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_start_isoc(dwc, dep, event); 179272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 179372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 179472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 179572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s: reason %s\n", 179640aa41fba348bc5bd19ff5bcf2b03d67bb01d1ceFelipe Balbi dep->name, event->status & 179740aa41fba348bc5bd19ff5bcf2b03d67bb01d1ceFelipe Balbi DEPEVT_STATUS_TRANSFER_ACTIVE 179872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ? "Transfer Active" 179972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi : "Transfer Not Active"); 180072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 180172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = __dwc3_gadget_kick_transfer(dep, 0, 1); 180272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!ret || ret == -EBUSY) 180372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 180472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 180572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "%s: failed to kick transfers\n", 180672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 180772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 180872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 180972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 1810879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi case DWC3_DEPEVT_STREAMEVT: 181116e78db720baa9356485336ec137c7ee0a482a9bIdo Shayevitz if (!usb_endpoint_xfer_bulk(dep->endpoint.desc)) { 1812879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dev_err(dwc->dev, "Stream event for non-Bulk %s\n", 1813879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dep->name); 1814879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi return; 1815879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi } 1816879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi 1817879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi switch (event->status) { 1818879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi case DEPEVT_STREAMEVT_FOUND: 1819879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dev_vdbg(dwc->dev, "Stream %d found and started\n", 1820879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi event->parameters); 1821879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi 1822879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi break; 1823879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi case DEPEVT_STREAMEVT_NOTFOUND: 1824879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi /* FALLTHROUGH */ 1825879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi default: 1826879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dev_dbg(dwc->dev, "Couldn't find suitable stream\n"); 1827879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi } 1828879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi break; 182972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPEVT_RXTXFIFOEVT: 183072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "%s FIFO Overrun\n", dep->name); 183172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 183272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPEVT_EPCMDCMPLT: 183372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_ep_cmd_compl(dep, event); 183472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 183572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 183672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 183772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 183872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_disconnect_gadget(struct dwc3 *dwc) 183972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 184072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dwc->gadget_driver && dwc->gadget_driver->disconnect) { 184172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock(&dwc->lock); 184272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver->disconnect(&dwc->gadget); 184372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock(&dwc->lock); 184472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 184572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 184672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 184772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_stop_active_transfer(struct dwc3 *dwc, u32 epnum) 184872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 184972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 185072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 185172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 cmd; 185272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 185372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 185472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[epnum]; 185572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1856624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior WARN_ON(!dep->res_trans_idx); 185772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->res_trans_idx) { 185872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd = DWC3_DEPCMD_ENDTRANSFER; 185972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd |= DWC3_DEPCMD_HIPRI_FORCERM | DWC3_DEPCMD_CMDIOC; 186072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd |= DWC3_DEPCMD_PARAM(dep->res_trans_idx); 186172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0, sizeof(params)); 186272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, cmd, ¶ms); 186372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi WARN_ON_ONCE(ret); 1864a1ae9be5fc137d7e911a77ef408273ff55a53a39Sebastian Andrzej Siewior dep->res_trans_idx = 0; 186572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 186672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 186772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 186872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_stop_active_transfers(struct dwc3 *dwc) 186972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 187072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 epnum; 187172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 187272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi for (epnum = 2; epnum < DWC3_ENDPOINTS_NUM; epnum++) { 187372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 187472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 187572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[epnum]; 187672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) 187772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi continue; 187872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1879624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior dwc3_remove_requests(dwc, dep); 188072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 188172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 188272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 188372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_clear_stall_all_ep(struct dwc3 *dwc) 188472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 188572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 epnum; 188672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 188772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi for (epnum = 1; epnum < DWC3_ENDPOINTS_NUM; epnum++) { 188872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 188972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 189072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 189172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 189272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[epnum]; 189372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 189472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(dep->flags & DWC3_EP_STALL)) 189572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi continue; 189672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 189772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags &= ~DWC3_EP_STALL; 189872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 189972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0, sizeof(params)); 190072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, 190172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEPCMD_CLEARSTALL, ¶ms); 190272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi WARN_ON_ONCE(ret); 190372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 190472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 190572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 190672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_disconnect_interrupt(struct dwc3 *dwc) 190772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 190872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s\n", __func__); 190972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#if 0 191072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi XXX 191172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi U1/U2 is powersave optimization. Skip it for now. Anyway we need to 191272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi enable it before we can disable it. 191372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 191472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 191572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DCTL_INITU1ENA; 191672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 191772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 191872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DCTL_INITU2ENA; 191972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 192072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#endif 192172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 192272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_stop_active_transfers(dwc); 192372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_disconnect_gadget(dwc); 1924b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman dwc->start_config_issued = false; 192572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 192672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_UNKNOWN; 1927df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi dwc->setup_packet_pending = false; 192872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 192972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1930d7a46a8dfc45191b39daa19c05d3ff74d1881f15Paul Zimmermanstatic void dwc3_gadget_usb3_phy_suspend(struct dwc3 *dwc, int suspend) 193172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 193272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 193372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 193472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(0)); 193572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1936d7a46a8dfc45191b39daa19c05d3ff74d1881f15Paul Zimmerman if (suspend) 193772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg |= DWC3_GUSB3PIPECTL_SUSPHY; 1938d7a46a8dfc45191b39daa19c05d3ff74d1881f15Paul Zimmerman else 1939d7a46a8dfc45191b39daa19c05d3ff74d1881f15Paul Zimmerman reg &= ~DWC3_GUSB3PIPECTL_SUSPHY; 194072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 194172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg); 194272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 194372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1944d7a46a8dfc45191b39daa19c05d3ff74d1881f15Paul Zimmermanstatic void dwc3_gadget_usb2_phy_suspend(struct dwc3 *dwc, int suspend) 194572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 194672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 194772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 194872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0)); 194972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1950d7a46a8dfc45191b39daa19c05d3ff74d1881f15Paul Zimmerman if (suspend) 195172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg |= DWC3_GUSB2PHYCFG_SUSPHY; 1952d7a46a8dfc45191b39daa19c05d3ff74d1881f15Paul Zimmerman else 1953d7a46a8dfc45191b39daa19c05d3ff74d1881f15Paul Zimmerman reg &= ~DWC3_GUSB2PHYCFG_SUSPHY; 195472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 195572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg); 195672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 195772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 195872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_reset_interrupt(struct dwc3 *dwc) 195972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 196072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 196172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 196272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s\n", __func__); 196372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1964df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi /* 1965df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * WORKAROUND: DWC3 revisions <1.88a have an issue which 1966df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * would cause a missing Disconnect Event if there's a 1967df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * pending Setup Packet in the FIFO. 1968df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * 1969df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * There's no suggested workaround on the official Bug 1970df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * report, which states that "unless the driver/application 1971df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * is doing any special handling of a disconnect event, 1972df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * there is no functional issue". 1973df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * 1974df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * Unfortunately, it turns out that we _do_ some special 1975df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * handling of a disconnect event, namely complete all 1976df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * pending transfers, notify gadget driver of the 1977df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * disconnection, and so on. 1978df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * 1979df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * Our suggested workaround is to follow the Disconnect 1980df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * Event steps here, instead, based on a setup_packet_pending 1981df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * flag. Such flag gets set whenever we have a XferNotReady 1982df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * event on EP0 and gets cleared on XferComplete for the 1983df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * same endpoint. 1984df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * 1985df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * Refers to: 1986df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * 1987df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * STAR#9000466709: RTL: Device : Disconnect event not 1988df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * generated if setup packet pending in FIFO 1989df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi */ 1990df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi if (dwc->revision < DWC3_REVISION_188A) { 1991df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi if (dwc->setup_packet_pending) 1992df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi dwc3_gadget_disconnect_interrupt(dwc); 1993df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi } 1994df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi 1995961906edb549c95f4cc33e4f3dbfd0fcc364954dFelipe Balbi /* after reset -> Default State */ 1996961906edb549c95f4cc33e4f3dbfd0fcc364954dFelipe Balbi dwc->dev_state = DWC3_DEFAULT_STATE; 1997961906edb549c95f4cc33e4f3dbfd0fcc364954dFelipe Balbi 1998802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman /* Recent versions support automatic phy suspend and don't need this */ 1999802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman if (dwc->revision < DWC3_REVISION_194A) { 2000802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman /* Resume PHYs */ 2001802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman dwc3_gadget_usb2_phy_suspend(dwc, false); 2002802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman dwc3_gadget_usb3_phy_suspend(dwc, false); 2003802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman } 200472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 200572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dwc->gadget.speed != USB_SPEED_UNKNOWN) 200672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_disconnect_gadget(dwc); 200772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 200872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 200972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DCTL_TSTCTRL_MASK; 2010e6a3b5e2888b51e37c65c97dae966f793bc4806aSebastian Andrzej Siewior reg &= ~(DWC3_DCTL_INITU1ENA | DWC3_DCTL_INITU2ENA); 201172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 20123b637367ae40b6d3c20e30cb0cdd059e67bbf848Gerard Cauvy dwc->test_mode = false; 201372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 201472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_stop_active_transfers(dwc); 201572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_clear_stall_all_ep(dwc); 2016b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman dwc->start_config_issued = false; 201772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 201872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* Reset device address to zero */ 201972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCFG); 202072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~(DWC3_DCFG_DEVADDR_MASK); 202172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCFG, reg); 202272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 202372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 202472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_update_ram_clk_sel(struct dwc3 *dwc, u32 speed) 202572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 202672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 202772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 usb30_clock = DWC3_GCTL_CLK_BUS; 202872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 202972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 203072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We change the clock only at SS but I dunno why I would want to do 203172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * this. Maybe it becomes part of the power saving plan. 203272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 203372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 203472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (speed != DWC3_DSTS_SUPERSPEED) 203572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 203672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 203772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 203872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * RAMClkSel is reset to 0 after USB reset, so it must be reprogrammed 203972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * each time on Connect Done. 204072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 204172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!usb30_clock) 204272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 204372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 204472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_GCTL); 204572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg |= DWC3_GCTL_RAMCLKSEL(usb30_clock); 204672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_GCTL, reg); 204772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 204872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 2049d7a46a8dfc45191b39daa19c05d3ff74d1881f15Paul Zimmermanstatic void dwc3_gadget_phy_suspend(struct dwc3 *dwc, u8 speed) 205072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 205172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (speed) { 205272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_SPEED_SUPER: 2053d7a46a8dfc45191b39daa19c05d3ff74d1881f15Paul Zimmerman dwc3_gadget_usb2_phy_suspend(dwc, true); 205472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 205572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_SPEED_HIGH: 205672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_SPEED_FULL: 205772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_SPEED_LOW: 2058d7a46a8dfc45191b39daa19c05d3ff74d1881f15Paul Zimmerman dwc3_gadget_usb3_phy_suspend(dwc, true); 205972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 206072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 206172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 206272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 206372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_conndone_interrupt(struct dwc3 *dwc) 206472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 206572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 206672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 206772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 206872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 206972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 speed; 207072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 207172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s\n", __func__); 207272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 207372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0x00, sizeof(params)); 207472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 207572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 207672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi speed = reg & DWC3_DSTS_CONNECTSPD; 207772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->speed = speed; 207872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 207972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_update_ram_clk_sel(dwc, speed); 208072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 208172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (speed) { 208272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DCFG_SUPERSPEED: 208305870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi /* 208405870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * WORKAROUND: DWC3 revisions <1.90a have an issue which 208505870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * would cause a missing USB3 Reset event. 208605870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * 208705870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * In such situations, we should force a USB3 Reset 208805870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * event by calling our dwc3_gadget_reset_interrupt() 208905870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * routine. 209005870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * 209105870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * Refers to: 209205870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * 209305870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * STAR#9000483510: RTL: SS : USB3 reset event may 209405870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * not be generated always when the link enters poll 209505870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi */ 209605870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi if (dwc->revision < DWC3_REVISION_190A) 209705870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi dwc3_gadget_reset_interrupt(dwc); 209805870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi 209972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(512); 210072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ep0->maxpacket = 512; 210172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_SUPER; 210272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 210372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DCFG_HIGHSPEED: 210472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(64); 210572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ep0->maxpacket = 64; 210672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_HIGH; 210772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 210872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DCFG_FULLSPEED2: 210972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DCFG_FULLSPEED1: 211072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(64); 211172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ep0->maxpacket = 64; 211272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_FULL; 211372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 211472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DCFG_LOWSPEED: 211572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(8); 211672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ep0->maxpacket = 8; 211772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_LOW; 211872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 211972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 212072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 2121802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman /* Recent versions support automatic phy suspend and don't need this */ 2122802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman if (dwc->revision < DWC3_REVISION_194A) { 2123802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman /* Suspend unneeded PHY */ 2124802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman dwc3_gadget_phy_suspend(dwc, dwc->gadget.speed); 2125802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman } 212672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 212772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[0]; 2128c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL); 212972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 213072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to enable %s\n", dep->name); 213172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 213272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 213372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 213472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[1]; 2135c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL); 213672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 213772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to enable %s\n", dep->name); 213872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 213972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 214072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 214172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 214272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Configure PHY via GUSB3PIPECTLn if required. 214372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 214472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Update GTXFIFOSIZn 214572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 214672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * In both cases reset values should be sufficient. 214772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 214872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 214972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 215072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_wakeup_interrupt(struct dwc3 *dwc) 215172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 215272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s\n", __func__); 215372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 215472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 215572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * TODO take core out of low power mode when that's 215672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * implemented. 215772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 215872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 215972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver->resume(&dwc->gadget); 216072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 216172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 216272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_linksts_change_interrupt(struct dwc3 *dwc, 216372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned int evtinfo) 216472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 2165fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi enum dwc3_link_state next = evtinfo & DWC3_LINK_STATE_MASK; 2166fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 2167fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi /* 2168fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * WORKAROUND: DWC3 Revisions <1.83a have an issue which, depending 2169fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * on the link partner, the USB session might do multiple entry/exit 2170fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * of low power states before a transfer takes place. 2171fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * 2172fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * Due to this problem, we might experience lower throughput. The 2173fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * suggested workaround is to disable DCTL[12:9] bits if we're 2174fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * transitioning from U1/U2 to U0 and enable those bits again 2175fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * after a transfer completes and there are no pending transfers 2176fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * on any of the enabled endpoints. 2177fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * 2178fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * This is the first half of that workaround. 2179fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * 2180fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * Refers to: 2181fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * 2182fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * STAR#9000446952: RTL: Device SS : if U1/U2 ->U0 takes >128us 2183fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * core send LGO_Ux entering U0 2184fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi */ 2185fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi if (dwc->revision < DWC3_REVISION_183A) { 2186fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi if (next == DWC3_LINK_STATE_U0) { 2187fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi u32 u1u2; 2188fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi u32 reg; 2189fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 2190fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi switch (dwc->link_state) { 2191fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi case DWC3_LINK_STATE_U1: 2192fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi case DWC3_LINK_STATE_U2: 2193fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 2194fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi u1u2 = reg & (DWC3_DCTL_INITU2ENA 2195fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi | DWC3_DCTL_ACCEPTU2ENA 2196fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi | DWC3_DCTL_INITU1ENA 2197fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi | DWC3_DCTL_ACCEPTU1ENA); 2198fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 2199fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi if (!dwc->u1u2) 2200fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi dwc->u1u2 = reg & u1u2; 2201fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 2202fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi reg &= ~u1u2; 2203fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 2204fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 2205fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi break; 2206fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi default: 2207fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi /* do nothing */ 2208fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi break; 2209fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi } 2210fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi } 2211fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi } 2212fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 2213fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi dwc->link_state = next; 2214019ac83252dc2b356cb0ca81c25a077ec90309e7Felipe Balbi 2215019ac83252dc2b356cb0ca81c25a077ec90309e7Felipe Balbi dev_vdbg(dwc->dev, "%s link %d\n", __func__, dwc->link_state); 221672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 221772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 221872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_interrupt(struct dwc3 *dwc, 221972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct dwc3_event_devt *event) 222072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 222172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (event->type) { 222272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_DISCONNECT: 222372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_disconnect_interrupt(dwc); 222472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 222572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_RESET: 222672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_reset_interrupt(dwc); 222772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 222872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_CONNECT_DONE: 222972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_conndone_interrupt(dwc); 223072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 223172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_WAKEUP: 223272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_wakeup_interrupt(dwc); 223372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 223472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_LINK_STATUS_CHANGE: 223572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_linksts_change_interrupt(dwc, event->event_info); 223672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 223772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_EOPF: 223872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "End of Periodic Frame\n"); 223972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 224072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_SOF: 224172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "Start of Periodic Frame\n"); 224272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 224372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_ERRATIC_ERROR: 224472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "Erratic Error\n"); 224572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 224672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_CMD_CMPL: 224772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "Command Complete\n"); 224872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 224972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_OVERFLOW: 225072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "Overflow\n"); 225172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 225272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 225372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "UNKNOWN IRQ %d\n", event->type); 225472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 225572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 225672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 225772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_process_event_entry(struct dwc3 *dwc, 225872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const union dwc3_event *event) 225972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 226072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* Endpoint IRQ, handle it and return early */ 226172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (event->type.is_devspec == 0) { 226272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* depevt */ 226372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return dwc3_endpoint_interrupt(dwc, &event->depevt); 226472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 226572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 226672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (event->type.type) { 226772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_EVENT_TYPE_DEV: 226872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_interrupt(dwc, &event->devt); 226972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 227072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* REVISIT what to do with Carkit and I2C events ? */ 227172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 227272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "UNKNOWN IRQ type %d\n", event->raw); 227372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 227472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 227572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 227672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic irqreturn_t dwc3_process_event_buf(struct dwc3 *dwc, u32 buf) 227772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 227872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_event_buffer *evt; 227972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int left; 228072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 count; 228172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 228272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi count = dwc3_readl(dwc->regs, DWC3_GEVNTCOUNT(buf)); 228372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi count &= DWC3_GEVNTCOUNT_MASK; 228472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!count) 228572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return IRQ_NONE; 228672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 228772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi evt = dwc->ev_buffs[buf]; 228872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi left = count; 228972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 229072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi while (left > 0) { 229172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi union dwc3_event event; 229272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 2293d70d84423cbc5d6d929640189cf204e693024309Felipe Balbi event.raw = *(u32 *) (evt->buf + evt->lpos); 2294d70d84423cbc5d6d929640189cf204e693024309Felipe Balbi 229572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_process_event_entry(dwc, &event); 229672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 229772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * XXX we wrap around correctly to the next entry as almost all 229872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * entries are 4 bytes in size. There is one entry which has 12 229972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * bytes which is a regular entry followed by 8 bytes data. ATM 230072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * I don't know how things are organized if were get next to the 230172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * a boundary so I worry about that once we try to handle that. 230272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 230372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi evt->lpos = (evt->lpos + 4) % DWC3_EVENT_BUFFERS_SIZE; 230472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi left -= 4; 230572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 230672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_GEVNTCOUNT(buf), 4); 230772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 230872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 230972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return IRQ_HANDLED; 231072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 231172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 231272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic irqreturn_t dwc3_interrupt(int irq, void *_dwc) 231372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 231472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = _dwc; 231572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int i; 231672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi irqreturn_t ret = IRQ_NONE; 231772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 231872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock(&dwc->lock); 231972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 23209f622b2a407d8b34a5a7f5b4abd8b29b25cf4f32Felipe Balbi for (i = 0; i < dwc->num_event_buffers; i++) { 232172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi irqreturn_t status; 232272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 232372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi status = dwc3_process_event_buf(dwc, i); 232472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (status == IRQ_HANDLED) 232572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = status; 232672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 232772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 232872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock(&dwc->lock); 232972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 233072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 233172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 233272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 233372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/** 233472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * dwc3_gadget_init - Initializes gadget related registers 23351d046793958f128dd43d42a4a0dac48bf6914273Paul Zimmerman * @dwc: pointer to our controller context structure 233672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 233772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Returns 0 on success otherwise negative errno. 233872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 233972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiint __devinit dwc3_gadget_init(struct dwc3 *dwc) 234072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 234172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 234272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 234372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int irq; 234472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 234572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ctrl_req = dma_alloc_coherent(dwc->dev, sizeof(*dwc->ctrl_req), 234672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi &dwc->ctrl_req_addr, GFP_KERNEL); 234772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dwc->ctrl_req) { 234872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to allocate ctrl request\n"); 234972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -ENOMEM; 235072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto err0; 235172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 235272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 235372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ep0_trb = dma_alloc_coherent(dwc->dev, sizeof(*dwc->ep0_trb), 235472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi &dwc->ep0_trb_addr, GFP_KERNEL); 235572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dwc->ep0_trb) { 235672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to allocate ep0 trb\n"); 235772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -ENOMEM; 235872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto err1; 235972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 236072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 23613ef35fafdc87b72851f7785dc5331a0f4eb1b3ceFelipe Balbi dwc->setup_buf = kzalloc(DWC3_EP0_BOUNCE_SIZE, GFP_KERNEL); 236272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dwc->setup_buf) { 236372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to allocate setup buffer\n"); 236472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -ENOMEM; 236572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto err2; 236672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 236772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 23685812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi dwc->ep0_bounce = dma_alloc_coherent(dwc->dev, 23693ef35fafdc87b72851f7785dc5331a0f4eb1b3ceFelipe Balbi DWC3_EP0_BOUNCE_SIZE, &dwc->ep0_bounce_addr, 23703ef35fafdc87b72851f7785dc5331a0f4eb1b3ceFelipe Balbi GFP_KERNEL); 23715812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi if (!dwc->ep0_bounce) { 23725812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi dev_err(dwc->dev, "failed to allocate ep0 bounce buffer\n"); 23735812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi ret = -ENOMEM; 23745812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi goto err3; 23755812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi } 23765812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi 237772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_set_name(&dwc->gadget.dev, "gadget"); 237872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 237972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ops = &dwc3_gadget_ops; 2380d327ab5b6d660d6fe22b073b743fde1668e593bbMichal Nazarewicz dwc->gadget.max_speed = USB_SPEED_SUPER; 238172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_UNKNOWN; 238272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.dev.parent = dwc->dev; 2383eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dwc->gadget.sg_supported = true; 238472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 238572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_set_coherent_mask(&dwc->gadget.dev, dwc->dev->coherent_dma_mask); 238672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 238772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.dev.dma_parms = dwc->dev->dma_parms; 238872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.dev.dma_mask = dwc->dev->dma_mask; 238972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.dev.release = dwc3_gadget_release; 239072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.name = "dwc3-gadget"; 239172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 239272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 239372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * REVISIT: Here we should clear all pending IRQs to be 239472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * sure we're starting from a well known location. 239572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 239672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 239772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_gadget_init_endpoints(dwc); 239872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 23995812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi goto err4; 240072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 240172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi irq = platform_get_irq(to_platform_device(dwc->dev), 0); 240272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 240372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = request_irq(irq, dwc3_interrupt, IRQF_SHARED, 240472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi "dwc3", dwc); 240572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 240672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to request irq #%d --> %d\n", 240772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi irq, ret); 24085812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi goto err5; 240972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 241072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 2411e6a3b5e2888b51e37c65c97dae966f793bc4806aSebastian Andrzej Siewior reg = dwc3_readl(dwc->regs, DWC3_DCFG); 2412e6a3b5e2888b51e37c65c97dae966f793bc4806aSebastian Andrzej Siewior reg |= DWC3_DCFG_LPM_CAP; 2413e6a3b5e2888b51e37c65c97dae966f793bc4806aSebastian Andrzej Siewior dwc3_writel(dwc->regs, DWC3_DCFG, reg); 2414e6a3b5e2888b51e37c65c97dae966f793bc4806aSebastian Andrzej Siewior 2415e6a3b5e2888b51e37c65c97dae966f793bc4806aSebastian Andrzej Siewior reg = dwc3_readl(dwc->regs, DWC3_DCTL); 2416e6a3b5e2888b51e37c65c97dae966f793bc4806aSebastian Andrzej Siewior reg |= DWC3_DCTL_ACCEPTU1ENA | DWC3_DCTL_ACCEPTU2ENA; 2417e6a3b5e2888b51e37c65c97dae966f793bc4806aSebastian Andrzej Siewior dwc3_writel(dwc->regs, DWC3_DCTL, reg); 2418e6a3b5e2888b51e37c65c97dae966f793bc4806aSebastian Andrzej Siewior 241972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* Enable all but Start and End of Frame IRQs */ 242072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = (DWC3_DEVTEN_VNDRDEVTSTRCVEDEN | 242172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEVTEN_EVNTOVERFLOWEN | 242272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEVTEN_CMDCMPLTEN | 242372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEVTEN_ERRTICERREN | 242472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEVTEN_WKUPEVTEN | 242572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEVTEN_ULSTCNGEN | 242672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEVTEN_CONNECTDONEEN | 242772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEVTEN_USBRSTEN | 242872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEVTEN_DISCONNEVTEN); 242972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEVTEN, reg); 243072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 2431802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman /* Enable USB2 LPM and automatic phy suspend only on recent versions */ 2432802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman if (dwc->revision >= DWC3_REVISION_194A) { 2433802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman reg = dwc3_readl(dwc->regs, DWC3_DCFG); 2434802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman reg |= DWC3_DCFG_LPM_CAP; 2435802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman dwc3_writel(dwc->regs, DWC3_DCFG, reg); 2436802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman 2437802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman reg = dwc3_readl(dwc->regs, DWC3_DCTL); 2438802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman reg &= ~(DWC3_DCTL_HIRD_THRES_MASK | DWC3_DCTL_L1_HIBER_EN); 2439802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman 2440802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman /* TODO: This should be configurable */ 2441802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman reg |= DWC3_DCTL_HIRD_THRES(31); 2442802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman 2443802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman dwc3_writel(dwc->regs, DWC3_DCTL, reg); 2444802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman 2445802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman dwc3_gadget_usb2_phy_suspend(dwc, true); 2446802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman dwc3_gadget_usb3_phy_suspend(dwc, true); 2447802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman } 2448802fde983e8a3391e059bd41fc272993ae642816Paul Zimmerman 244972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = device_register(&dwc->gadget.dev); 245072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 245172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to register gadget device\n"); 245272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi put_device(&dwc->gadget.dev); 24535812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi goto err6; 245472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 245572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 245672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = usb_add_gadget_udc(dwc->dev, &dwc->gadget); 245772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 245872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to register udc\n"); 24595812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi goto err7; 246072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 246172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 246272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 246372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 24645812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbierr7: 246572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi device_unregister(&dwc->gadget.dev); 246672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 24675812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbierr6: 246872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEVTEN, 0x00); 246972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi free_irq(irq, dwc); 247072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 24715812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbierr5: 247272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_free_endpoints(dwc); 247372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 24745812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbierr4: 24753ef35fafdc87b72851f7785dc5331a0f4eb1b3ceFelipe Balbi dma_free_coherent(dwc->dev, DWC3_EP0_BOUNCE_SIZE, 24763ef35fafdc87b72851f7785dc5331a0f4eb1b3ceFelipe Balbi dwc->ep0_bounce, dwc->ep0_bounce_addr); 24775812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi 247872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbierr3: 24790fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi kfree(dwc->setup_buf); 248072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 248172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbierr2: 248272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(*dwc->ep0_trb), 248372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ep0_trb, dwc->ep0_trb_addr); 248472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 248572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbierr1: 248672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(*dwc->ctrl_req), 248772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ctrl_req, dwc->ctrl_req_addr); 248872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 248972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbierr0: 249072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 249172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 249272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 249372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbivoid dwc3_gadget_exit(struct dwc3 *dwc) 249472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 249572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int irq; 249672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 249772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi usb_del_gadget_udc(&dwc->gadget); 249872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi irq = platform_get_irq(to_platform_device(dwc->dev), 0); 249972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 250072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEVTEN, 0x00); 250172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi free_irq(irq, dwc); 250272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 250372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_free_endpoints(dwc); 250472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 25053ef35fafdc87b72851f7785dc5331a0f4eb1b3ceFelipe Balbi dma_free_coherent(dwc->dev, DWC3_EP0_BOUNCE_SIZE, 25063ef35fafdc87b72851f7785dc5331a0f4eb1b3ceFelipe Balbi dwc->ep0_bounce, dwc->ep0_bounce_addr); 25075812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi 25080fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi kfree(dwc->setup_buf); 250972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 251072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(*dwc->ep0_trb), 251172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ep0_trb, dwc->ep0_trb_addr); 251272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 251372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(*dwc->ctrl_req), 251472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ctrl_req, dwc->ctrl_req_addr); 251572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 251672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi device_unregister(&dwc->gadget.dev); 251772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 2518