gadget.c revision 40aa41fba348bc5bd19ff5bcf2b03d67bb01d1ce
172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/** 272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * gadget.c - DesignWare USB3 DRD Controller Gadget Framework Link 372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com 572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Authors: Felipe Balbi <balbi@ti.com>, 772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Sebastian Andrzej Siewior <bigeasy@linutronix.de> 872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Redistribution and use in source and binary forms, with or without 1072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * modification, are permitted provided that the following conditions 1172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * are met: 1272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 1. Redistributions of source code must retain the above copyright 1372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * notice, this list of conditions, and the following disclaimer, 1472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * without modification. 1572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 2. Redistributions in binary form must reproduce the above copyright 1672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * notice, this list of conditions and the following disclaimer in the 1772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * documentation and/or other materials provided with the distribution. 1872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 3. The names of the above-listed copyright holders may not be used 1972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * to endorse or promote products derived from this software without 2072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * specific prior written permission. 2172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 2272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * ALTERNATIVELY, this software may be distributed under the terms of the 2372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * GNU General Public License ("GPL") version 2, as published by the Free 2472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Software Foundation. 2572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 2672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS 2772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 2872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 2972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 3072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 3172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 3272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 3372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 3472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 3572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 3672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 3772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 3872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 3972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/kernel.h> 4072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/delay.h> 4172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/slab.h> 4272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/spinlock.h> 4372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/platform_device.h> 4472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/pm_runtime.h> 4572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/interrupt.h> 4672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/io.h> 4772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/list.h> 4872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/dma-mapping.h> 4972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 5072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/usb/ch9.h> 5172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/usb/gadget.h> 5272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 5372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include "core.h" 5472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include "gadget.h" 5572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include "io.h" 5672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 5772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#define DMA_ADDR_INVALID (~(dma_addr_t)0) 5872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 5904a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi/** 6004a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi * dwc3_gadget_set_test_mode - Enables USB2 Test Modes 6104a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi * @dwc: pointer to our context structure 6204a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi * @mode: the mode to set (J, K SE0 NAK, Force Enable) 6304a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi * 6404a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi * Caller should take care of locking. This function will 6504a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi * return 0 on success or -EINVAL if wrong Test Selector 6604a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi * is passed 6704a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi */ 6804a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbiint dwc3_gadget_set_test_mode(struct dwc3 *dwc, int mode) 6904a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi{ 7004a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi u32 reg; 7104a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi 7204a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 7304a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi reg &= ~DWC3_DCTL_TSTCTRL_MASK; 7404a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi 7504a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi switch (mode) { 7604a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi case TEST_J: 7704a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi case TEST_K: 7804a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi case TEST_SE0_NAK: 7904a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi case TEST_PACKET: 8004a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi case TEST_FORCE_EN: 8104a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi reg |= mode << 1; 8204a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi break; 8304a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi default: 8404a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi return -EINVAL; 8504a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi } 8604a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi 8704a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 8804a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi 8904a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi return 0; 9004a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi} 9104a9bfcd50dd568a8f1a10194a7f336f6b3ad81cFelipe Balbi 928598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi/** 938598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi * dwc3_gadget_set_link_state - Sets USB Link to a particular State 948598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi * @dwc: pointer to our context structure 958598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi * @state: the state to put link into 968598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi * 978598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi * Caller should take care of locking. This function will 988598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi * return 0 on success or -EINVAL. 998598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi */ 1008598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbiint dwc3_gadget_set_link_state(struct dwc3 *dwc, enum dwc3_link_state state) 1018598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi{ 1028598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi int retries = 100; 1038598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi u32 reg; 1048598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi 1058598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 1068598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi reg &= ~DWC3_DCTL_ULSTCHNGREQ_MASK; 1078598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi 1088598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi /* set requested state */ 1098598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi reg |= DWC3_DCTL_ULSTCHNGREQ(state); 1108598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 1118598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi 1128598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi /* wait for a change in DSTS */ 1138598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi while (--retries) { 1148598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 1158598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi 1168598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi /* in HS, means ON */ 1178598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi if (DWC3_DSTS_USBLNKST(reg) == state) 1188598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi return 0; 1198598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi 120138801aaa566ecb5a5739a85909b9ec7285efd70Felipe Balbi udelay(500); 1218598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi } 1228598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi 1238598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi dev_vdbg(dwc->dev, "link state change request timed out\n"); 1248598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi 1258598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi return -ETIMEDOUT; 1268598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi} 1278598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi 12872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbivoid dwc3_map_buffer_to_dma(struct dwc3_request *req) 12972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 13072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = req->dep->dwc; 13172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 13278c58a53c9864447f2a46d4c06dd3c2616823ad2Sebastian Andrzej Siewior if (req->request.length == 0) { 13378c58a53c9864447f2a46d4c06dd3c2616823ad2Sebastian Andrzej Siewior /* req->request.dma = dwc->setup_buf_addr; */ 13478c58a53c9864447f2a46d4c06dd3c2616823ad2Sebastian Andrzej Siewior return; 13578c58a53c9864447f2a46d4c06dd3c2616823ad2Sebastian Andrzej Siewior } 13678c58a53c9864447f2a46d4c06dd3c2616823ad2Sebastian Andrzej Siewior 137eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (req->request.num_sgs) { 138eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi int mapped; 139eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi 140eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi mapped = dma_map_sg(dwc->dev, req->request.sg, 141eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi req->request.num_sgs, 142eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi req->direction ? DMA_TO_DEVICE 143eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi : DMA_FROM_DEVICE); 144eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (mapped < 0) { 145eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dev_err(dwc->dev, "failed to map SGs\n"); 146eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi return; 147eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi } 148eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi 149eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi req->request.num_mapped_sgs = mapped; 150eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi return; 151eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi } 152eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi 15372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (req->request.dma == DMA_ADDR_INVALID) { 15472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.dma = dma_map_single(dwc->dev, req->request.buf, 15572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.length, req->direction 15672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ? DMA_TO_DEVICE : DMA_FROM_DEVICE); 15772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->mapped = true; 15872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 15972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 16072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 16172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbivoid dwc3_unmap_buffer_from_dma(struct dwc3_request *req) 16272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 16372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = req->dep->dwc; 16472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 16578c58a53c9864447f2a46d4c06dd3c2616823ad2Sebastian Andrzej Siewior if (req->request.length == 0) { 16678c58a53c9864447f2a46d4c06dd3c2616823ad2Sebastian Andrzej Siewior req->request.dma = DMA_ADDR_INVALID; 16778c58a53c9864447f2a46d4c06dd3c2616823ad2Sebastian Andrzej Siewior return; 16878c58a53c9864447f2a46d4c06dd3c2616823ad2Sebastian Andrzej Siewior } 16978c58a53c9864447f2a46d4c06dd3c2616823ad2Sebastian Andrzej Siewior 170eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (req->request.num_mapped_sgs) { 171eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi req->request.dma = DMA_ADDR_INVALID; 172eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dma_unmap_sg(dwc->dev, req->request.sg, 173c09d6b51d78f5ad33417dbac9b479bd6709f9f25Sebastian Andrzej Siewior req->request.num_mapped_sgs, 174eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi req->direction ? DMA_TO_DEVICE 175eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi : DMA_FROM_DEVICE); 176eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi 177eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi req->request.num_mapped_sgs = 0; 178eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi return; 179eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi } 180eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi 18172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (req->mapped) { 18272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_unmap_single(dwc->dev, req->request.dma, 18372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.length, req->direction 18472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ? DMA_TO_DEVICE : DMA_FROM_DEVICE); 18572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->mapped = 0; 186f198ead21bcb7b03d7bb2cba7ba0f5ad615a3862Felipe Balbi req->request.dma = DMA_ADDR_INVALID; 18772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 18872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 18972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 19072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbivoid dwc3_gadget_giveback(struct dwc3_ep *dep, struct dwc3_request *req, 19172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int status) 19272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 19372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 19472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 19572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (req->queued) { 196eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (req->request.num_mapped_sgs) 197eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dep->busy_slot += req->request.num_mapped_sgs; 198eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi else 199eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dep->busy_slot++; 200eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi 20172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 20272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Skip LINK TRB. We can't use req->trb and check for 20372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * DWC3_TRBCTL_LINK_TRB because it points the TRB we just 20472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * completed (not the LINK TRB). 20572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 20672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (((dep->busy_slot & DWC3_TRB_MASK) == DWC3_TRB_NUM - 1) && 20772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi usb_endpoint_xfer_isoc(dep->desc)) 20872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->busy_slot++; 20972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 21072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_del(&req->list); 211eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi req->trb = NULL; 21272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 21372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (req->request.status == -EINPROGRESS) 21472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.status = status; 21572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 21672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_unmap_buffer_from_dma(req); 21772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 21872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "request %p from %s completed %d/%d ===> %d\n", 21972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req, dep->name, req->request.actual, 22072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.length, status); 22172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 22272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock(&dwc->lock); 22372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.complete(&req->dep->endpoint, &req->request); 22472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock(&dwc->lock); 22572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 22672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 22772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic const char *dwc3_gadget_ep_cmd_string(u8 cmd) 22872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 22972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (cmd) { 23072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_DEPSTARTCFG: 23172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Start New Configuration"; 23272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_ENDTRANSFER: 23372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "End Transfer"; 23472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_UPDATETRANSFER: 23572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Update Transfer"; 23672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_STARTTRANSFER: 23772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Start Transfer"; 23872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_CLEARSTALL: 23972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Clear Stall"; 24072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_SETSTALL: 24172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Set Stall"; 24272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_GETSEQNUMBER: 24372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Get Data Sequence Number"; 24472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_SETTRANSFRESOURCE: 24572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Set Endpoint Transfer Resource"; 24672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_SETEPCONFIG: 24772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Set Endpoint Configuration"; 24872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 24972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "UNKNOWN command"; 25072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 25172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 25272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 25372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiint dwc3_send_gadget_ep_cmd(struct dwc3 *dwc, unsigned ep, 25472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned cmd, struct dwc3_gadget_ep_cmd_params *params) 25572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 25672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = dwc->eps[ep]; 25761d58242f634642de42d6a4098913b7254a65053Sebastian Andrzej Siewior u32 timeout = 500; 25872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 25972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 26072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s: cmd '%s' params %08x %08x %08x\n", 26172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name, 262dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi dwc3_gadget_ep_cmd_string(cmd), params->param0, 263dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params->param1, params->param2); 26472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 265dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEPCMDPAR0(ep), params->param0); 266dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEPCMDPAR1(ep), params->param1); 267dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEPCMDPAR2(ep), params->param2); 26872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 26972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEPCMD(ep), cmd | DWC3_DEPCMD_CMDACT); 27072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi do { 27172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DEPCMD(ep)); 27272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(reg & DWC3_DEPCMD_CMDACT)) { 273164f6e141ed214bda30fb219d41ec3254bd90886Felipe Balbi dev_vdbg(dwc->dev, "Command Complete --> %d\n", 274164f6e141ed214bda30fb219d41ec3254bd90886Felipe Balbi DWC3_DEPCMD_STATUS(reg)); 27572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 27672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 27772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 27872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 27972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We can't sleep here, because it is also called from 28072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * interrupt context. 28172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 28272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi timeout--; 28372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!timeout) 28472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -ETIMEDOUT; 28572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 28661d58242f634642de42d6a4098913b7254a65053Sebastian Andrzej Siewior udelay(1); 28772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } while (1); 28872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 28972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 29072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic dma_addr_t dwc3_trb_dma_offset(struct dwc3_ep *dep, 29172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_trb_hw *trb) 29272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 293c439ef87c33a1df30f528cb152151465c2529cacPaul Zimmerman u32 offset = (char *) trb - (char *) dep->trb_pool; 29472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 29572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return dep->trb_pool_dma + offset; 29672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 29772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 29872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_alloc_trb_pool(struct dwc3_ep *dep) 29972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 30072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 30172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 30272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->trb_pool) 30372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 30472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 30572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->number == 0 || dep->number == 1) 30672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 30772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 30872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->trb_pool = dma_alloc_coherent(dwc->dev, 30972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi sizeof(struct dwc3_trb) * DWC3_TRB_NUM, 31072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi &dep->trb_pool_dma, GFP_KERNEL); 31172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dep->trb_pool) { 31272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dep->dwc->dev, "failed to allocate trb pool for %s\n", 31372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 31472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -ENOMEM; 31572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 31672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 31772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 31872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 31972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 32072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_free_trb_pool(struct dwc3_ep *dep) 32172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 32272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 32372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 32472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(struct dwc3_trb) * DWC3_TRB_NUM, 32572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->trb_pool, dep->trb_pool_dma); 32672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 32772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->trb_pool = NULL; 32872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->trb_pool_dma = 0; 32972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 33072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 33172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_start_config(struct dwc3 *dwc, struct dwc3_ep *dep) 33272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 33372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 33472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 cmd; 33572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 33672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0x00, sizeof(params)); 33772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 33872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->number != 1) { 33972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd = DWC3_DEPCMD_DEPSTARTCFG; 34072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* XferRscIdx == 0 for ep0 and 2 for the remaining */ 341b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman if (dep->number > 1) { 342b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman if (dwc->start_config_issued) 343b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman return 0; 344b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman dwc->start_config_issued = true; 34572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd |= DWC3_DEPCMD_PARAM(2); 346b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman } 34772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 34872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return dwc3_send_gadget_ep_cmd(dwc, 0, cmd, ¶ms); 34972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 35072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 35172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 35272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 35372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 35472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_set_ep_config(struct dwc3 *dwc, struct dwc3_ep *dep, 355c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi const struct usb_endpoint_descriptor *desc, 356c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi const struct usb_ss_ep_comp_descriptor *comp_desc) 35772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 35872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 35972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 36072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0x00, sizeof(params)); 36172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 362dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param0 = DWC3_DEPCFG_EP_TYPE(usb_endpoint_type(desc)) 363dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi | DWC3_DEPCFG_MAX_PACKET_SIZE(usb_endpoint_maxp(desc)) 364dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi | DWC3_DEPCFG_BURST_SIZE(dep->endpoint.maxburst); 36572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 366dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param1 = DWC3_DEPCFG_XFER_COMPLETE_EN 367dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi | DWC3_DEPCFG_XFER_NOT_READY_EN; 36872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 36918b7ede5f7ee2092aedcb578d3ac30bd5d4fc23cFelipe Balbi if (usb_ss_max_streams(comp_desc) && usb_endpoint_xfer_bulk(desc)) { 370dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param1 |= DWC3_DEPCFG_STREAM_CAPABLE 371dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi | DWC3_DEPCFG_STREAM_EVENT_EN; 372879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dep->stream_capable = true; 373879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi } 374879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi 37572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (usb_endpoint_xfer_isoc(desc)) 376dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param1 |= DWC3_DEPCFG_XFER_IN_PROGRESS_EN; 37772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 37872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 37972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We are doing 1:1 mapping for endpoints, meaning 38072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Physical Endpoints 2 maps to Logical Endpoint 2 and 38172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * so on. We consider the direction bit as part of the physical 38272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * endpoint number. So USB endpoint 0x81 is 0x03. 38372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 384dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param1 |= DWC3_DEPCFG_EP_NUMBER(dep->number); 38572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 38672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 38772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We must use the lower 16 TX FIFOs even though 38872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * HW might have more 38972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 39072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->direction) 391dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param0 |= DWC3_DEPCFG_FIFO_NUMBER(dep->number >> 1); 39272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 39372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (desc->bInterval) { 394dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param1 |= DWC3_DEPCFG_BINTERVAL_M1(desc->bInterval - 1); 39572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->interval = 1 << (desc->bInterval - 1); 39672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 39772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 39872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return dwc3_send_gadget_ep_cmd(dwc, dep->number, 39972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEPCMD_SETEPCONFIG, ¶ms); 40072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 40172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 40272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_set_xfer_resource(struct dwc3 *dwc, struct dwc3_ep *dep) 40372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 40472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 40572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 40672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0x00, sizeof(params)); 40772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 408dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param0 = DWC3_DEPXFERCFG_NUM_XFER_RES(1); 40972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 41072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return dwc3_send_gadget_ep_cmd(dwc, dep->number, 41172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEPCMD_SETTRANSFRESOURCE, ¶ms); 41272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 41372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 41472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/** 41572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * __dwc3_gadget_ep_enable - Initializes a HW endpoint 41672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * @dep: endpoint to be initialized 41772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * @desc: USB Endpoint Descriptor 41872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 41972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Caller should take care of locking 42072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 42172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int __dwc3_gadget_ep_enable(struct dwc3_ep *dep, 422c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi const struct usb_endpoint_descriptor *desc, 423c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi const struct usb_ss_ep_comp_descriptor *comp_desc) 42472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 42572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 42672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 42772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret = -ENOMEM; 42872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 42972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) { 43072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_gadget_start_config(dwc, dep); 43172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 43272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 43372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 43472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 435c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi ret = dwc3_gadget_set_ep_config(dwc, dep, desc, comp_desc); 43672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 43772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 43872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 43972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) { 44072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_trb_hw *trb_st_hw; 44172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_trb_hw *trb_link_hw; 44272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_trb trb_link; 44372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 44472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_gadget_set_xfer_resource(dwc, dep); 44572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 44672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 44772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 44872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->desc = desc; 449c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi dep->comp_desc = comp_desc; 45072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->type = usb_endpoint_type(desc); 45172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags |= DWC3_EP_ENABLED; 45272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 45372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DALEPENA); 45472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg |= DWC3_DALEPENA_EP(dep->number); 45572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DALEPENA, reg); 45672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 45772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!usb_endpoint_xfer_isoc(desc)) 45872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 45972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 46072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(&trb_link, 0, sizeof(trb_link)); 46172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 46272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* Link TRB for ISOC. The HWO but is never reset */ 46372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trb_st_hw = &dep->trb_pool[0]; 46472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 46572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trb_link.bplh = dwc3_trb_dma_offset(dep, trb_st_hw); 46672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trb_link.trbctl = DWC3_TRBCTL_LINK_TRB; 46772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trb_link.hwo = true; 46872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 46972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trb_link_hw = &dep->trb_pool[DWC3_TRB_NUM - 1]; 47072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_trb_to_hw(&trb_link, trb_link_hw); 47172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 47272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 47372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 47472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 47572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 476624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewiorstatic void dwc3_stop_active_transfer(struct dwc3 *dwc, u32 epnum); 477624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewiorstatic void dwc3_remove_requests(struct dwc3 *dwc, struct dwc3_ep *dep) 47872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 47972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req; 48072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 481624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior if (!list_empty(&dep->req_queued)) 482624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior dwc3_stop_active_transfer(dwc, dep->number); 483624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior 48472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi while (!list_empty(&dep->request_list)) { 48572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req = next_request(&dep->request_list); 48672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 487624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior dwc3_gadget_giveback(dep, req, -ESHUTDOWN); 48872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 48972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 49072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 49172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/** 49272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * __dwc3_gadget_ep_disable - Disables a HW endpoint 49372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * @dep: the endpoint to disable 49472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 495624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior * This function also removes requests which are currently processed ny the 496624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior * hardware and those which are not yet scheduled. 497624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior * Caller should take care of locking. 49872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 49972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int __dwc3_gadget_ep_disable(struct dwc3_ep *dep) 50072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 50172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 50272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 50372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 504624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior dwc3_remove_requests(dwc, dep); 50572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 50672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DALEPENA); 50772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DALEPENA_EP(dep->number); 50872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DALEPENA, reg); 50972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 510879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dep->stream_capable = false; 51172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->desc = NULL; 512c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi dep->comp_desc = NULL; 51372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->type = 0; 514879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dep->flags = 0; 51572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 51672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 51772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 51872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 51972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 52072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 52172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep0_enable(struct usb_ep *ep, 52272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct usb_endpoint_descriptor *desc) 52372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 52472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EINVAL; 52572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 52672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 52772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep0_disable(struct usb_ep *ep) 52872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 52972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EINVAL; 53072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 53172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 53272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 53372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 53472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_enable(struct usb_ep *ep, 53572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct usb_endpoint_descriptor *desc) 53672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 53772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 53872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc; 53972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 54072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 54172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 54272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!ep || !desc || desc->bDescriptorType != USB_DT_ENDPOINT) { 54372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi pr_debug("dwc3: invalid parameters\n"); 54472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EINVAL; 54572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 54672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 54772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!desc->wMaxPacketSize) { 54872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi pr_debug("dwc3: missing wMaxPacketSize\n"); 54972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EINVAL; 55072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 55172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 55272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = to_dwc3_ep(ep); 55372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc = dep->dwc; 55472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 55572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (usb_endpoint_type(desc)) { 55672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_ENDPOINT_XFER_CONTROL: 55772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi strncat(dep->name, "-control", sizeof(dep->name)); 55872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 55972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_ENDPOINT_XFER_ISOC: 56072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi strncat(dep->name, "-isoc", sizeof(dep->name)); 56172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 56272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_ENDPOINT_XFER_BULK: 56372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi strncat(dep->name, "-bulk", sizeof(dep->name)); 56472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 56572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_ENDPOINT_XFER_INT: 56672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi strncat(dep->name, "-int", sizeof(dep->name)); 56772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 56872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 56972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "invalid endpoint transfer type\n"); 57072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 57172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 57272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->flags & DWC3_EP_ENABLED) { 57372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_WARN_ONCE(dwc->dev, true, "%s is already enabled\n", 57472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 57572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 57672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 57772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 57872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "Enabling %s\n", dep->name); 57972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 58072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 581c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi ret = __dwc3_gadget_ep_enable(dep, desc, ep->comp_desc); 58272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 58372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 58472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 58572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 58672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 58772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_disable(struct usb_ep *ep) 58872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 58972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 59072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc; 59172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 59272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 59372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 59472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!ep) { 59572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi pr_debug("dwc3: invalid parameters\n"); 59672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EINVAL; 59772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 59872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 59972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = to_dwc3_ep(ep); 60072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc = dep->dwc; 60172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 60272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) { 60372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_WARN_ONCE(dwc->dev, true, "%s is already disabled\n", 60472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 60572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 60672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 60772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 60872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi snprintf(dep->name, sizeof(dep->name), "ep%d%s", 60972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->number >> 1, 61072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi (dep->number & 1) ? "in" : "out"); 61172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 61272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 61372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = __dwc3_gadget_ep_disable(dep); 61472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 61572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 61672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 61772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 61872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 61972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic struct usb_request *dwc3_gadget_ep_alloc_request(struct usb_ep *ep, 62072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi gfp_t gfp_flags) 62172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 62272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req; 62372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = to_dwc3_ep(ep); 62472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 62572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 62672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req = kzalloc(sizeof(*req), gfp_flags); 62772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!req) { 62872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "not enough memory\n"); 62972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return NULL; 63072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 63172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 63272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->epnum = dep->number; 63372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->dep = dep; 63472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.dma = DMA_ADDR_INVALID; 63572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 63672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return &req->request; 63772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 63872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 63972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_ep_free_request(struct usb_ep *ep, 64072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct usb_request *request) 64172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 64272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req = to_dwc3_request(request); 64372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 64472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi kfree(req); 64572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 64672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 647c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi/** 648c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi * dwc3_prepare_one_trb - setup one TRB from one request 649c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi * @dep: endpoint for which this request is prepared 650c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi * @req: dwc3_request pointer 651c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi */ 65268e823e24aea5227eaf20d6435485e733109d113Felipe Balbistatic void dwc3_prepare_one_trb(struct dwc3_ep *dep, 653eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi struct dwc3_request *req, dma_addr_t dma, 654eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi unsigned length, unsigned last, unsigned chain) 655c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi{ 656eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi struct dwc3 *dwc = dep->dwc; 657c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi struct dwc3_trb_hw *trb_hw; 658c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi struct dwc3_trb trb; 659c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 660c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi unsigned int cur_slot; 661c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 662eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dev_vdbg(dwc->dev, "%s: req %p dma %08llx length %d%s%s\n", 663eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dep->name, req, (unsigned long long) dma, 664eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi length, last ? " last" : "", 665eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi chain ? " chain" : ""); 666eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi 667c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi trb_hw = &dep->trb_pool[dep->free_slot & DWC3_TRB_MASK]; 668c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi cur_slot = dep->free_slot; 669c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi dep->free_slot++; 670c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 671c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi /* Skip the LINK-TRB on ISOC */ 672c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi if (((cur_slot & DWC3_TRB_MASK) == DWC3_TRB_NUM - 1) && 673c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi usb_endpoint_xfer_isoc(dep->desc)) 67468e823e24aea5227eaf20d6435485e733109d113Felipe Balbi return; 675c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 676c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi memset(&trb, 0, sizeof(trb)); 677eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (!req->trb) { 678eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dwc3_gadget_move_request_queued(req); 679eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi req->trb = trb_hw; 680eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi req->trb_dma = dwc3_trb_dma_offset(dep, trb_hw); 681eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi } 682c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 683c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi if (usb_endpoint_xfer_isoc(dep->desc)) { 684c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi trb.isp_imi = true; 685c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi trb.csp = true; 686c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi } else { 687eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi trb.chn = chain; 688c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi trb.lst = last; 689c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi } 690c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 691c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi if (usb_endpoint_xfer_bulk(dep->desc) && dep->stream_capable) 692c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi trb.sid_sofn = req->request.stream_id; 693c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 694c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi switch (usb_endpoint_type(dep->desc)) { 695c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi case USB_ENDPOINT_XFER_CONTROL: 696c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi trb.trbctl = DWC3_TRBCTL_CONTROL_SETUP; 697c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi break; 698c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 699c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi case USB_ENDPOINT_XFER_ISOC: 700c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi trb.trbctl = DWC3_TRBCTL_ISOCHRONOUS_FIRST; 701c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 702c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi /* IOC every DWC3_TRB_NUM / 4 so we can refill */ 703c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi if (!(cur_slot % (DWC3_TRB_NUM / 4))) 704c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi trb.ioc = last; 705c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi break; 706c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 707c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi case USB_ENDPOINT_XFER_BULK: 708c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi case USB_ENDPOINT_XFER_INT: 709c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi trb.trbctl = DWC3_TRBCTL_NORMAL; 710c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi break; 711c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi default: 712c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi /* 713c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi * This is only possible with faulty memory because we 714c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi * checked it already :) 715c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi */ 716c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi BUG(); 717c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi } 718c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 719eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi trb.length = length; 720eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi trb.bplh = dma; 721c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi trb.hwo = true; 722c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 723c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi dwc3_trb_to_hw(&trb, trb_hw); 724c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi} 725c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 72672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* 72772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * dwc3_prepare_trbs - setup TRBs from requests 72872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * @dep: endpoint for which requests are being prepared 72972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * @starting: true if the endpoint is idle and no requests are queued. 73072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 73172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * The functions goes through the requests list and setups TRBs for the 73272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * transfers. The functions returns once there are not more TRBs available or 73372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * it run out of requests. 73472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 73568e823e24aea5227eaf20d6435485e733109d113Felipe Balbistatic void dwc3_prepare_trbs(struct dwc3_ep *dep, bool starting) 73672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 73768e823e24aea5227eaf20d6435485e733109d113Felipe Balbi struct dwc3_request *req, *n; 73872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 trbs_left; 739c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi unsigned int last_one = 0; 74072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 74172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi BUILD_BUG_ON_NOT_POWER_OF_2(DWC3_TRB_NUM); 74272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 74372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* the first request must not be queued */ 74472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trbs_left = (dep->busy_slot - dep->free_slot) & DWC3_TRB_MASK; 745c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 74672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 74772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * if busy & slot are equal than it is either full or empty. If we are 74872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * starting to proceed requests then we are empty. Otherwise we ar 74972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * full and don't do anything 75072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 75172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!trbs_left) { 75272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!starting) 75368e823e24aea5227eaf20d6435485e733109d113Felipe Balbi return; 75472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trbs_left = DWC3_TRB_NUM; 75572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 75672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * In case we start from scratch, we queue the ISOC requests 75772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * starting from slot 1. This is done because we use ring 75872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * buffer and have no LST bit to stop us. Instead, we place 75972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * IOC bit TRB_NUM/4. We try to avoid to having an interrupt 76072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * after the first request so we start at slot 1 and have 76172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 7 requests proceed before we hit the first IOC. 76272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Other transfer types don't use the ring buffer and are 76372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * processed from the first TRB until the last one. Since we 76472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * don't wrap around we have to start at the beginning. 76572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 76672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (usb_endpoint_xfer_isoc(dep->desc)) { 76772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->busy_slot = 1; 76872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->free_slot = 1; 76972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 77072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->busy_slot = 0; 77172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->free_slot = 0; 77272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 77372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 77472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 77572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* The last TRB is a link TRB, not used for xfer */ 77672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if ((trbs_left <= 1) && usb_endpoint_xfer_isoc(dep->desc)) 77768e823e24aea5227eaf20d6435485e733109d113Felipe Balbi return; 77872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 77972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_for_each_entry_safe(req, n, &dep->request_list, list) { 780eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi unsigned length; 781eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dma_addr_t dma; 78272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 783eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (req->request.num_mapped_sgs > 0) { 784eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi struct usb_request *request = &req->request; 785eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi struct scatterlist *sg = request->sg; 786eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi struct scatterlist *s; 787eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi int i; 78872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 789eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi for_each_sg(sg, s, request->num_mapped_sgs, i) { 790eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi unsigned chain = true; 79172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 792eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi length = sg_dma_len(s); 793eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dma = sg_dma_address(s); 79472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 795eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (i == (request->num_mapped_sgs - 1) 796eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi || sg_is_last(s)) { 797eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi last_one = true; 798eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi chain = false; 799eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi } 80072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 801eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi trbs_left--; 802eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (!trbs_left) 803eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi last_one = true; 80472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 805eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (last_one) 806eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi chain = false; 80772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 808eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dwc3_prepare_one_trb(dep, req, dma, length, 809eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi last_one, chain); 81072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 811eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (last_one) 812eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi break; 813eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi } 81472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 815eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dma = req->request.dma; 816eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi length = req->request.length; 817eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi trbs_left--; 81872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 819eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (!trbs_left) 820eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi last_one = 1; 821879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi 822eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi /* Is this the last request? */ 823eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (list_is_last(&req->list, &dep->request_list)) 824eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi last_one = 1; 82572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 826eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dwc3_prepare_one_trb(dep, req, dma, length, 827eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi last_one, false); 82872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 829eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (last_one) 830eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi break; 83172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 83272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 83372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 83472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 83572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int __dwc3_gadget_kick_transfer(struct dwc3_ep *dep, u16 cmd_param, 83672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int start_new) 83772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 83872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 83972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req; 84072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 84172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 84272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 cmd; 84372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 84472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (start_new && (dep->flags & DWC3_EP_BUSY)) { 84572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s: endpoint busy\n", dep->name); 84672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EBUSY; 84772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 84872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags &= ~DWC3_EP_PENDING_REQUEST; 84972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 85072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 85172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * If we are getting here after a short-out-packet we don't enqueue any 85272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * new requests as we try to set the IOC bit only on the last request. 85372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 85472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (start_new) { 85572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (list_empty(&dep->req_queued)) 85672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_prepare_trbs(dep, start_new); 85772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 85872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* req points to the first request which will be sent */ 85972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req = next_request(&dep->req_queued); 86072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 86168e823e24aea5227eaf20d6435485e733109d113Felipe Balbi dwc3_prepare_trbs(dep, start_new); 86268e823e24aea5227eaf20d6435485e733109d113Felipe Balbi 86372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 86472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * req points to the first request where HWO changed 86572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * from 0 to 1 86672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 86768e823e24aea5227eaf20d6435485e733109d113Felipe Balbi req = next_request(&dep->req_queued); 86872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 86972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!req) { 87072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags |= DWC3_EP_PENDING_REQUEST; 87172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 87272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 87372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 87472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0, sizeof(params)); 875dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param0 = upper_32_bits(req->trb_dma); 876dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param1 = lower_32_bits(req->trb_dma); 87772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 87872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (start_new) 87972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd = DWC3_DEPCMD_STARTTRANSFER; 88072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi else 88172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd = DWC3_DEPCMD_UPDATETRANSFER; 88272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 88372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd |= DWC3_DEPCMD_PARAM(cmd_param); 88472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, cmd, ¶ms); 88572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret < 0) { 88672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "failed to send STARTTRANSFER command\n"); 88772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 88872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 88972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * FIXME we need to iterate over the list of requests 89072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * here and stop, unmap, free and del each of the linked 89172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * requests instead of we do now. 89272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 89372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_unmap_buffer_from_dma(req); 89472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_del(&req->list); 89572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 89672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 89772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 89872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags |= DWC3_EP_BUSY; 89972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->res_trans_idx = dwc3_gadget_ep_get_transfer_index(dwc, 90072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->number); 90125b8ff68bf1d4954d4a9dcb4862c6b6a53cb09e2Felipe Balbi 90225b8ff68bf1d4954d4a9dcb4862c6b6a53cb09e2Felipe Balbi WARN_ON_ONCE(!dep->res_trans_idx); 90325b8ff68bf1d4954d4a9dcb4862c6b6a53cb09e2Felipe Balbi 90472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 90572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 90672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 90772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int __dwc3_gadget_ep_queue(struct dwc3_ep *dep, struct dwc3_request *req) 90872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 90972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.actual = 0; 91072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.status = -EINPROGRESS; 91172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->direction = dep->direction; 91272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->epnum = dep->number; 91372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 91472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 91572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We only add to our list of requests now and 91672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * start consuming the list once we get XferNotReady 91772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * IRQ. 91872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 91972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * That way, we avoid doing anything that we don't need 92072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * to do now and defer it until the point we receive a 92172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * particular token from the Host side. 92272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 92372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * This will also avoid Host cancelling URBs due to too 92472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * many NACKs. 92572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 92672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_map_buffer_to_dma(req); 92772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_add_tail(&req->list, &dep->request_list); 92872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 92972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 93072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * There is one special case: XferNotReady with 93172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * empty list of requests. We need to kick the 93272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * transfer here in that situation, otherwise 93372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * we will be NAKing forever. 93472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 93572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * If we get XferNotReady before gadget driver 93672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * has a chance to queue a request, we will ACK 93772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * the IRQ but won't be able to receive the data 93872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * until the next request is queued. The following 93972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * code is handling exactly that. 94072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 94172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->flags & DWC3_EP_PENDING_REQUEST) { 94272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 94372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int start_trans; 94472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 94572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi start_trans = 1; 94672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (usb_endpoint_xfer_isoc(dep->endpoint.desc) && 94772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags & DWC3_EP_BUSY) 94872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi start_trans = 0; 94972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 95072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = __dwc3_gadget_kick_transfer(dep, 0, start_trans); 95172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret && ret != -EBUSY) { 95272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 95372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 95472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "%s: failed to kick transfers\n", 95572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 95672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 95772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi }; 95872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 95972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 96072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 96172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 96272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_queue(struct usb_ep *ep, struct usb_request *request, 96372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi gfp_t gfp_flags) 96472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 96572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req = to_dwc3_request(request); 96672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = to_dwc3_ep(ep); 96772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 96872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 96972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 97072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 97172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 97272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 97372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dep->desc) { 97472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "trying to queue request %p to disabled %s\n", 97572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi request, ep->name); 97672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -ESHUTDOWN; 97772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 97872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 97972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "queing request %p to %s length %d\n", 98072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi request, ep->name, request->length); 98172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 98272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 98372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = __dwc3_gadget_ep_queue(dep, req); 98472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 98572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 98672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 98772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 98872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 98972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_dequeue(struct usb_ep *ep, 99072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct usb_request *request) 99172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 99272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req = to_dwc3_request(request); 99372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *r = NULL; 99472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 99572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = to_dwc3_ep(ep); 99672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 99772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 99872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 99972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret = 0; 100072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 100172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 100272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 100372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_for_each_entry(r, &dep->request_list, list) { 100472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (r == req) 100572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 100672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 100772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 100872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (r != req) { 100972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_for_each_entry(r, &dep->req_queued, list) { 101072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (r == req) 101172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 101272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 101372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (r == req) { 101472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* wait until it is processed */ 101572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_stop_active_transfer(dwc, dep->number); 101672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto out0; 101772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 101872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "request %p was not queued to %s\n", 101972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi request, ep->name); 102072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EINVAL; 102172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto out0; 102272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 102372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 102472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* giveback the request */ 102572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_giveback(dep, req, -ECONNRESET); 102672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 102772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiout0: 102872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 102972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 103072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 103172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 103272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 103372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiint __dwc3_gadget_ep_set_halt(struct dwc3_ep *dep, int value) 103472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 103572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 103672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 103772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 103872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 103972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0x00, sizeof(params)); 104072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 104172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (value) { 10420b7836a9eb32f626ffd3fe3045e8c618cb8ed965Felipe Balbi if (dep->number == 0 || dep->number == 1) { 10430b7836a9eb32f626ffd3fe3045e8c618cb8ed965Felipe Balbi /* 10440b7836a9eb32f626ffd3fe3045e8c618cb8ed965Felipe Balbi * Whenever EP0 is stalled, we will restart 10450b7836a9eb32f626ffd3fe3045e8c618cb8ed965Felipe Balbi * the state machine, thus moving back to 10460b7836a9eb32f626ffd3fe3045e8c618cb8ed965Felipe Balbi * Setup Phase 10470b7836a9eb32f626ffd3fe3045e8c618cb8ed965Felipe Balbi */ 10480b7836a9eb32f626ffd3fe3045e8c618cb8ed965Felipe Balbi dwc->ep0state = EP0_SETUP_PHASE; 10490b7836a9eb32f626ffd3fe3045e8c618cb8ed965Felipe Balbi } 105072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 105172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, 105272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEPCMD_SETSTALL, ¶ms); 105372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 105472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to %s STALL on %s\n", 105572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi value ? "set" : "clear", 105672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 105772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi else 105872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags |= DWC3_EP_STALL; 105972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 10605275455a6e6ae6b57303834b0afd267bb9657ffcPaul Zimmerman if (dep->flags & DWC3_EP_WEDGE) 10615275455a6e6ae6b57303834b0afd267bb9657ffcPaul Zimmerman return 0; 10625275455a6e6ae6b57303834b0afd267bb9657ffcPaul Zimmerman 106372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, 106472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEPCMD_CLEARSTALL, ¶ms); 106572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 106672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to %s STALL on %s\n", 106772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi value ? "set" : "clear", 106872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 106972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi else 107072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags &= ~DWC3_EP_STALL; 107172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 10725275455a6e6ae6b57303834b0afd267bb9657ffcPaul Zimmerman 107372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 107472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 107572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 107672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_set_halt(struct usb_ep *ep, int value) 107772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 107872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = to_dwc3_ep(ep); 107972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 108072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 108172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 108272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 108372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 108472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 108572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 108672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 108772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (usb_endpoint_xfer_isoc(dep->desc)) { 108872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "%s is of Isochronous type\n", dep->name); 108972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EINVAL; 109072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto out; 109172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 109272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 109372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = __dwc3_gadget_ep_set_halt(dep, value); 109472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiout: 109572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 109672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 109772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 109872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 109972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 110072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_set_wedge(struct usb_ep *ep) 110172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 110272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = to_dwc3_ep(ep); 110372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 110472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags |= DWC3_EP_WEDGE; 110572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 11065275455a6e6ae6b57303834b0afd267bb9657ffcPaul Zimmerman return dwc3_gadget_ep_set_halt(ep, 1); 110772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 110872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 110972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 111072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 111172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic struct usb_endpoint_descriptor dwc3_gadget_ep0_desc = { 111272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .bLength = USB_DT_ENDPOINT_SIZE, 111372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .bDescriptorType = USB_DT_ENDPOINT, 111472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .bmAttributes = USB_ENDPOINT_XFER_CONTROL, 111572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi}; 111672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 111772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic const struct usb_ep_ops dwc3_gadget_ep0_ops = { 111872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .enable = dwc3_gadget_ep0_enable, 111972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .disable = dwc3_gadget_ep0_disable, 112072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .alloc_request = dwc3_gadget_ep_alloc_request, 112172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .free_request = dwc3_gadget_ep_free_request, 112272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .queue = dwc3_gadget_ep0_queue, 112372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .dequeue = dwc3_gadget_ep_dequeue, 112472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .set_halt = dwc3_gadget_ep_set_halt, 112572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .set_wedge = dwc3_gadget_ep_set_wedge, 112672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi}; 112772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 112872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic const struct usb_ep_ops dwc3_gadget_ep_ops = { 112972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .enable = dwc3_gadget_ep_enable, 113072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .disable = dwc3_gadget_ep_disable, 113172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .alloc_request = dwc3_gadget_ep_alloc_request, 113272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .free_request = dwc3_gadget_ep_free_request, 113372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .queue = dwc3_gadget_ep_queue, 113472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .dequeue = dwc3_gadget_ep_dequeue, 113572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .set_halt = dwc3_gadget_ep_set_halt, 113672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .set_wedge = dwc3_gadget_ep_set_wedge, 113772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi}; 113872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 113972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 114072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 114172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_get_frame(struct usb_gadget *g) 114272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 114372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 114472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 114572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 114672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 114772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return DWC3_DSTS_SOFFN(reg); 114872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 114972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 115072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_wakeup(struct usb_gadget *g) 115172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 115272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 115372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 115472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long timeout; 115572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 115672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 115772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 115872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 115972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret = 0; 116072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 116172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 link_state; 116272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 speed; 116372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 116472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 116572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 116672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 116772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * According to the Databook Remote wakeup request should 116872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * be issued only when the device is in early suspend state. 116972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 117072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We can check that via USB Link State bits in DSTS register. 117172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 117272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 117372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 117472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi speed = reg & DWC3_DSTS_CONNECTSPD; 117572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (speed == DWC3_DSTS_SUPERSPEED) { 117672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "no wakeup on SuperSpeed\n"); 117772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EINVAL; 117872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto out; 117972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 118072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 118172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi link_state = DWC3_DSTS_USBLNKST(reg); 118272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 118372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (link_state) { 118472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_LINK_STATE_RX_DET: /* in HS, means Early Suspend */ 118572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_LINK_STATE_U3: /* in HS, means SUSPEND */ 118672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 118772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 118872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "can't wakeup from link state %d\n", 118972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi link_state); 119072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EINVAL; 119172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto out; 119272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 119372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 11948598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi ret = dwc3_gadget_set_link_state(dwc, DWC3_LINK_STATE_RECOV); 11958598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi if (ret < 0) { 11968598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi dev_err(dwc->dev, "failed to put link in Recovery\n"); 11978598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi goto out; 11988598bde7fa125e85bc97decd6513d37dcf1e7bd9Felipe Balbi } 119972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 120072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* write zeroes to Link Change Request */ 120172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DCTL_ULSTCHNGREQ_MASK; 120272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 120372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 120472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* pool until Link State change to ON */ 120572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi timeout = jiffies + msecs_to_jiffies(100); 120672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 120772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi while (!(time_after(jiffies, timeout))) { 120872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 120972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 121072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* in HS, means ON */ 121172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (DWC3_DSTS_USBLNKST(reg) == DWC3_LINK_STATE_U0) 121272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 121372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 121472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 121572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (DWC3_DSTS_USBLNKST(reg) != DWC3_LINK_STATE_U0) { 121672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to send remote wakeup\n"); 121772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EINVAL; 121872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 121972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 122072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiout: 122172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 122272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 122372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 122472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 122572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 122672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_set_selfpowered(struct usb_gadget *g, 122772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int is_selfpowered) 122872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 122972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 123072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 123172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->is_selfpowered = !!is_selfpowered; 123272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 123372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 123472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 123572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 123672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_run_stop(struct dwc3 *dwc, int is_on) 123772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 123872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 123961d58242f634642de42d6a4098913b7254a65053Sebastian Andrzej Siewior u32 timeout = 500; 124072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 124172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 124272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (is_on) 124372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg |= DWC3_DCTL_RUN_STOP; 124472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi else 124572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DCTL_RUN_STOP; 124672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 124772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 124872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 124972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi do { 125072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 125172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (is_on) { 125272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(reg & DWC3_DSTS_DEVCTRLHLT)) 125372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 125472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 125572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (reg & DWC3_DSTS_DEVCTRLHLT) 125672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 125772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 125872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi timeout--; 125972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!timeout) 126072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 126161d58242f634642de42d6a4098913b7254a65053Sebastian Andrzej Siewior udelay(1); 126272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } while (1); 126372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 126472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "gadget %s data soft-%s\n", 126572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver 126672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ? dwc->gadget_driver->function : "no-function", 126772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi is_on ? "connect" : "disconnect"); 126872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 126972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 127072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_pullup(struct usb_gadget *g, int is_on) 127172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 127272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 127372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 127472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 127572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi is_on = !!is_on; 127672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 127772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 127872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_run_stop(dwc, is_on); 127972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 128072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 128172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 128272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 128372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 128472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_start(struct usb_gadget *g, 128572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct usb_gadget_driver *driver) 128672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 128772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 128872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 128972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 129072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret = 0; 129172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 129272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 129372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 129472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 129572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dwc->gadget_driver) { 129672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "%s is already bound to %s\n", 129772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.name, 129872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver->driver.name); 129972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EBUSY; 130072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto err0; 130172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 130272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 130372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver = driver; 130472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.dev.driver = &driver->driver; 130572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 130672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCFG); 130772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~(DWC3_DCFG_SPEED_MASK); 13086c167fc9b0c23ead791edb94cf4debb6b8e534b5Felipe Balbi reg |= dwc->maximum_speed; 130972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCFG, reg); 131072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1311b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman dwc->start_config_issued = false; 1312b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman 131372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* Start with SuperSpeed Default */ 131472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(512); 131572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 131672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[0]; 1317c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL); 131872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 131972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to enable %s\n", dep->name); 132072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto err0; 132172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 132272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 132372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[1]; 1324c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL); 132572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 132672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to enable %s\n", dep->name); 132772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto err1; 132872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 132972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 133072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* begin to receive SETUP packets */ 1331c7fcdeb2627c46b7ec3f0bcb2054b10405f9a70eFelipe Balbi dwc->ep0state = EP0_SETUP_PHASE; 133272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_ep0_out_start(dwc); 133372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 133472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 133572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 133672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 133772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 133872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbierr1: 133972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi __dwc3_gadget_ep_disable(dwc->eps[0]); 134072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 134172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbierr0: 134272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 134372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 134472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 134572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 134672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 134772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_stop(struct usb_gadget *g, 134872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct usb_gadget_driver *driver) 134972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 135072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 135172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 135272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 135372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 135472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 135572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi __dwc3_gadget_ep_disable(dwc->eps[0]); 135672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi __dwc3_gadget_ep_disable(dwc->eps[1]); 135772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 135872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver = NULL; 135972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.dev.driver = NULL; 136072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 136172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 136272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 136372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 136472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 136572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic const struct usb_gadget_ops dwc3_gadget_ops = { 136672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .get_frame = dwc3_gadget_get_frame, 136772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .wakeup = dwc3_gadget_wakeup, 136872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .set_selfpowered = dwc3_gadget_set_selfpowered, 136972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .pullup = dwc3_gadget_pullup, 137072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .udc_start = dwc3_gadget_start, 137172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .udc_stop = dwc3_gadget_stop, 137272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi}; 137372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 137472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 137572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 137672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int __devinit dwc3_gadget_init_endpoints(struct dwc3 *dwc) 137772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 137872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 137972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 epnum; 138072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 138172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi INIT_LIST_HEAD(&dwc->gadget.ep_list); 138272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 138372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi for (epnum = 0; epnum < DWC3_ENDPOINTS_NUM; epnum++) { 138472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = kzalloc(sizeof(*dep), GFP_KERNEL); 138572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dep) { 138672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "can't allocate endpoint %d\n", 138772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi epnum); 138872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -ENOMEM; 138972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 139072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 139172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->dwc = dwc; 139272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->number = epnum; 139372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->eps[epnum] = dep; 139472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 139572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi snprintf(dep->name, sizeof(dep->name), "ep%d%s", epnum >> 1, 139672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi (epnum & 1) ? "in" : "out"); 139772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->endpoint.name = dep->name; 139872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->direction = (epnum & 1); 139972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 140072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (epnum == 0 || epnum == 1) { 140172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->endpoint.maxpacket = 512; 140272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->endpoint.ops = &dwc3_gadget_ep0_ops; 140372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!epnum) 140472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ep0 = &dep->endpoint; 140572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 140672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 140772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 140872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->endpoint.maxpacket = 1024; 140912d36c16bde3ee0643d705caa87723de536dbe49Sebastian Andrzej Siewior dep->endpoint.max_streams = 15; 141072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->endpoint.ops = &dwc3_gadget_ep_ops; 141172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_add_tail(&dep->endpoint.ep_list, 141272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi &dwc->gadget.ep_list); 141372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 141472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_alloc_trb_pool(dep); 141525b8ff68bf1d4954d4a9dcb4862c6b6a53cb09e2Felipe Balbi if (ret) 141672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 141772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 141825b8ff68bf1d4954d4a9dcb4862c6b6a53cb09e2Felipe Balbi 141972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi INIT_LIST_HEAD(&dep->request_list); 142072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi INIT_LIST_HEAD(&dep->req_queued); 142172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 142272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 142372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 142472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 142572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 142672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_free_endpoints(struct dwc3 *dwc) 142772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 142872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 142972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 epnum; 143072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 143172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi for (epnum = 0; epnum < DWC3_ENDPOINTS_NUM; epnum++) { 143272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[epnum]; 143372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_free_trb_pool(dep); 143472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 143572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (epnum != 0 && epnum != 1) 143672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_del(&dep->endpoint.ep_list); 143772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 143872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi kfree(dep); 143972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 144072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 144172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 144272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_release(struct device *dev) 144372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 144472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dev, "%s\n", __func__); 144572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 144672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 144772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 144872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_cleanup_done_reqs(struct dwc3 *dwc, struct dwc3_ep *dep, 144972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct dwc3_event_depevt *event, int status) 145072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 145172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req; 145272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_trb trb; 145372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned int count; 145472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned int s_pkt = 0; 145572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 145672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi do { 145772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req = next_request(&dep->req_queued); 1458d39ee7be2aaf0a53d7b5f43c13571bac95f7cc0cSebastian Andrzej Siewior if (!req) { 1459d39ee7be2aaf0a53d7b5f43c13571bac95f7cc0cSebastian Andrzej Siewior WARN_ON_ONCE(1); 1460d39ee7be2aaf0a53d7b5f43c13571bac95f7cc0cSebastian Andrzej Siewior return 1; 1461d39ee7be2aaf0a53d7b5f43c13571bac95f7cc0cSebastian Andrzej Siewior } 146272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 146372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_trb_to_nat(req->trb, &trb); 146472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 14650d2f4758530d1598087d1d2f3e75b4f7d17fc6c7Sebastian Andrzej Siewior if (trb.hwo && status != -ESHUTDOWN) 14660d2f4758530d1598087d1d2f3e75b4f7d17fc6c7Sebastian Andrzej Siewior /* 14670d2f4758530d1598087d1d2f3e75b4f7d17fc6c7Sebastian Andrzej Siewior * We continue despite the error. There is not much we 14680d2f4758530d1598087d1d2f3e75b4f7d17fc6c7Sebastian Andrzej Siewior * can do. If we don't clean in up we loop for ever. If 14690d2f4758530d1598087d1d2f3e75b4f7d17fc6c7Sebastian Andrzej Siewior * we skip the TRB than it gets overwritten reused after 14700d2f4758530d1598087d1d2f3e75b4f7d17fc6c7Sebastian Andrzej Siewior * a while since we use them in a ring buffer. a BUG() 14710d2f4758530d1598087d1d2f3e75b4f7d17fc6c7Sebastian Andrzej Siewior * would help. Lets hope that if this occures, someone 14720d2f4758530d1598087d1d2f3e75b4f7d17fc6c7Sebastian Andrzej Siewior * fixes the root cause instead of looking away :) 14730d2f4758530d1598087d1d2f3e75b4f7d17fc6c7Sebastian Andrzej Siewior */ 147472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "%s's TRB (%p) still owned by HW\n", 147572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name, req->trb); 147672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi count = trb.length; 147772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 147872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->direction) { 147972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (count) { 148072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "incomplete IN transfer %s\n", 148172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 148272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi status = -ECONNRESET; 148372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 148472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 148572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (count && (event->status & DEPEVT_STATUS_SHORT)) 148672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi s_pkt = 1; 148772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 148872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 148972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 149072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We assume here we will always receive the entire data block 149172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * which we should receive. Meaning, if we program RX to 149272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * receive 4K but we receive only 2K, we assume that's all we 149372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * should receive and we simply bounce the request back to the 149472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * gadget driver for further processing. 149572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 149672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.actual += req->request.length - count; 149772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_giveback(dep, req, status); 149872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (s_pkt) 149972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 150072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if ((event->status & DEPEVT_STATUS_LST) && trb.lst) 150172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 150272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if ((event->status & DEPEVT_STATUS_IOC) && trb.ioc) 150372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 150472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } while (1); 150572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 150672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if ((event->status & DEPEVT_STATUS_IOC) && trb.ioc) 150772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 150872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 1; 150972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 151072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 151172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_endpoint_transfer_complete(struct dwc3 *dwc, 151272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep, const struct dwc3_event_depevt *event, 151372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int start_new) 151472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 151572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned status = 0; 151672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int clean_busy; 151772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 151872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (event->status & DEPEVT_STATUS_BUSERR) 151972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi status = -ECONNRESET; 152072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 152172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi clean_busy = dwc3_cleanup_done_reqs(dwc, dep, event, status); 1522a1ae9be5fc137d7e911a77ef408273ff55a53a39Sebastian Andrzej Siewior if (clean_busy) { 152372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags &= ~DWC3_EP_BUSY; 1524a1ae9be5fc137d7e911a77ef408273ff55a53a39Sebastian Andrzej Siewior dep->res_trans_idx = 0; 1525a1ae9be5fc137d7e911a77ef408273ff55a53a39Sebastian Andrzej Siewior } 1526fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1527fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi /* 1528fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * WORKAROUND: This is the 2nd half of U1/U2 -> U0 workaround. 1529fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * See dwc3_gadget_linksts_change_interrupt() for 1st half. 1530fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi */ 1531fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi if (dwc->revision < DWC3_REVISION_183A) { 1532fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi u32 reg; 1533fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi int i; 1534fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1535fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi for (i = 0; i < DWC3_ENDPOINTS_NUM; i++) { 1536fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi struct dwc3_ep *dep = dwc->eps[i]; 1537fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1538fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) 1539fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi continue; 1540fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1541fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi if (!list_empty(&dep->req_queued)) 1542fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi return; 1543fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi } 1544fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1545fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 1546fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi reg |= dwc->u1u2; 1547fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 1548fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1549fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi dwc->u1u2 = 0; 1550fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi } 155172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 155272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 155372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_start_isoc(struct dwc3 *dwc, 155472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep, const struct dwc3_event_depevt *event) 155572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 155672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 uf; 155772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 155872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (list_empty(&dep->request_list)) { 155972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "ISOC ep %s run out for requests.\n", 156072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 156172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 156272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 156372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 156472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (event->parameters) { 156572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 mask; 156672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 156772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi mask = ~(dep->interval - 1); 156872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi uf = event->parameters & mask; 156972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 4 micro frames in the future */ 157072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi uf += dep->interval * 4; 157172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 157272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi uf = 0; 157372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 157472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 157572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi __dwc3_gadget_kick_transfer(dep, uf, 1); 157672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 157772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 157872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_process_ep_cmd_complete(struct dwc3_ep *dep, 157972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct dwc3_event_depevt *event) 158072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 158172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 158272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_event_depevt mod_ev = *event; 158372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 158472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 158572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We were asked to remove one requests. It is possible that this 158672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * request and a few other were started together and have the same 158772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * transfer index. Since we stopped the complete endpoint we don't 158872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * know how many requests were already completed (and not yet) 158972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * reported and how could be done (later). We purge them all until 159072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * the end of the list. 159172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 159272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi mod_ev.status = DEPEVT_STATUS_LST; 159372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_cleanup_done_reqs(dwc, dep, &mod_ev, -ESHUTDOWN); 159472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags &= ~DWC3_EP_BUSY; 159572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* pending requets are ignored and are queued on XferNotReady */ 159672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 159772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 159872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_ep_cmd_compl(struct dwc3_ep *dep, 159972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct dwc3_event_depevt *event) 160072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 160172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 param = event->parameters; 160272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 cmd_type = (param >> 8) & ((1 << 5) - 1); 160372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 160472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (cmd_type) { 160572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_ENDTRANSFER: 160672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_process_ep_cmd_complete(dep, event); 160772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 160872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_STARTTRANSFER: 160972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->res_trans_idx = param & 0x7f; 161072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 161172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 161272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi printk(KERN_ERR "%s() unknown /unexpected type: %d\n", 161372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi __func__, cmd_type); 161472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 161572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi }; 161672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 161772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 161872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_endpoint_interrupt(struct dwc3 *dwc, 161972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct dwc3_event_depevt *event) 162072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 162172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 162272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 epnum = event->endpoint_number; 162372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 162472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[epnum]; 162572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 162672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s: %s\n", dep->name, 162772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_ep_event_string(event->endpoint_event)); 162872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 162972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (epnum == 0 || epnum == 1) { 163072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_ep0_interrupt(dwc, event); 163172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 163272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 163372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 163472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (event->endpoint_event) { 163572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPEVT_XFERCOMPLETE: 163672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (usb_endpoint_xfer_isoc(dep->desc)) { 163772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "%s is an Isochronous endpoint\n", 163872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 163972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 164072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 164172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 164272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_endpoint_transfer_complete(dwc, dep, event, 1); 164372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 164472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPEVT_XFERINPROGRESS: 164572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!usb_endpoint_xfer_isoc(dep->desc)) { 164672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "%s is not an Isochronous endpoint\n", 164772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 164872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 164972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 165072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 165172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_endpoint_transfer_complete(dwc, dep, event, 0); 165272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 165372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPEVT_XFERNOTREADY: 165472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (usb_endpoint_xfer_isoc(dep->desc)) { 165572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_start_isoc(dwc, dep, event); 165672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 165772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 165872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 165972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s: reason %s\n", 166040aa41fba348bc5bd19ff5bcf2b03d67bb01d1ceFelipe Balbi dep->name, event->status & 166140aa41fba348bc5bd19ff5bcf2b03d67bb01d1ceFelipe Balbi DEPEVT_STATUS_TRANSFER_ACTIVE 166272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ? "Transfer Active" 166372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi : "Transfer Not Active"); 166472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 166572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = __dwc3_gadget_kick_transfer(dep, 0, 1); 166672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!ret || ret == -EBUSY) 166772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 166872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 166972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "%s: failed to kick transfers\n", 167072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 167172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 167272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 167372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 1674879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi case DWC3_DEPEVT_STREAMEVT: 1675879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi if (!usb_endpoint_xfer_bulk(dep->desc)) { 1676879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dev_err(dwc->dev, "Stream event for non-Bulk %s\n", 1677879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dep->name); 1678879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi return; 1679879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi } 1680879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi 1681879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi switch (event->status) { 1682879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi case DEPEVT_STREAMEVT_FOUND: 1683879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dev_vdbg(dwc->dev, "Stream %d found and started\n", 1684879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi event->parameters); 1685879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi 1686879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi break; 1687879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi case DEPEVT_STREAMEVT_NOTFOUND: 1688879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi /* FALLTHROUGH */ 1689879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi default: 1690879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dev_dbg(dwc->dev, "Couldn't find suitable stream\n"); 1691879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi } 1692879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi break; 169372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPEVT_RXTXFIFOEVT: 169472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "%s FIFO Overrun\n", dep->name); 169572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 169672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPEVT_EPCMDCMPLT: 169772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_ep_cmd_compl(dep, event); 169872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 169972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 170072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 170172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 170272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_disconnect_gadget(struct dwc3 *dwc) 170372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 170472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dwc->gadget_driver && dwc->gadget_driver->disconnect) { 170572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock(&dwc->lock); 170672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver->disconnect(&dwc->gadget); 170772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock(&dwc->lock); 170872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 170972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 171072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 171172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_stop_active_transfer(struct dwc3 *dwc, u32 epnum) 171272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 171372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 171472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 171572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 cmd; 171672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 171772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 171872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[epnum]; 171972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1720624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior WARN_ON(!dep->res_trans_idx); 172172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->res_trans_idx) { 172272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd = DWC3_DEPCMD_ENDTRANSFER; 172372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd |= DWC3_DEPCMD_HIPRI_FORCERM | DWC3_DEPCMD_CMDIOC; 172472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd |= DWC3_DEPCMD_PARAM(dep->res_trans_idx); 172572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0, sizeof(params)); 172672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, cmd, ¶ms); 172772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi WARN_ON_ONCE(ret); 1728a1ae9be5fc137d7e911a77ef408273ff55a53a39Sebastian Andrzej Siewior dep->res_trans_idx = 0; 172972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 173072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 173172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 173272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_stop_active_transfers(struct dwc3 *dwc) 173372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 173472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 epnum; 173572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 173672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi for (epnum = 2; epnum < DWC3_ENDPOINTS_NUM; epnum++) { 173772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 173872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 173972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[epnum]; 174072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) 174172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi continue; 174272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1743624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior dwc3_remove_requests(dwc, dep); 174472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 174572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 174672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 174772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_clear_stall_all_ep(struct dwc3 *dwc) 174872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 174972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 epnum; 175072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 175172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi for (epnum = 1; epnum < DWC3_ENDPOINTS_NUM; epnum++) { 175272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 175372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 175472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 175572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 175672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[epnum]; 175772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 175872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(dep->flags & DWC3_EP_STALL)) 175972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi continue; 176072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 176172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags &= ~DWC3_EP_STALL; 176272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 176372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0, sizeof(params)); 176472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, 176572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEPCMD_CLEARSTALL, ¶ms); 176672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi WARN_ON_ONCE(ret); 176772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 176872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 176972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 177072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_disconnect_interrupt(struct dwc3 *dwc) 177172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 177272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s\n", __func__); 177372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#if 0 177472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi XXX 177572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi U1/U2 is powersave optimization. Skip it for now. Anyway we need to 177672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi enable it before we can disable it. 177772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 177872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 177972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DCTL_INITU1ENA; 178072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 178172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 178272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DCTL_INITU2ENA; 178372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 178472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#endif 178572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 178672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_stop_active_transfers(dwc); 178772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_disconnect_gadget(dwc); 1788b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman dwc->start_config_issued = false; 178972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 179072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_UNKNOWN; 1791df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi dwc->setup_packet_pending = false; 179272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 179372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 179472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_usb3_phy_power(struct dwc3 *dwc, int on) 179572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 179672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 179772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 179872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(0)); 179972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 180072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (on) 180172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_GUSB3PIPECTL_SUSPHY; 180272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi else 180372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg |= DWC3_GUSB3PIPECTL_SUSPHY; 180472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 180572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg); 180672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 180772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 180872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_usb2_phy_power(struct dwc3 *dwc, int on) 180972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 181072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 181172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 181272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0)); 181372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 181472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (on) 181572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_GUSB2PHYCFG_SUSPHY; 181672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi else 181772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg |= DWC3_GUSB2PHYCFG_SUSPHY; 181872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 181972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg); 182072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 182172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 182272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_reset_interrupt(struct dwc3 *dwc) 182372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 182472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 182572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 182672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s\n", __func__); 182772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1828df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi /* 1829df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * WORKAROUND: DWC3 revisions <1.88a have an issue which 1830df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * would cause a missing Disconnect Event if there's a 1831df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * pending Setup Packet in the FIFO. 1832df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * 1833df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * There's no suggested workaround on the official Bug 1834df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * report, which states that "unless the driver/application 1835df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * is doing any special handling of a disconnect event, 1836df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * there is no functional issue". 1837df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * 1838df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * Unfortunately, it turns out that we _do_ some special 1839df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * handling of a disconnect event, namely complete all 1840df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * pending transfers, notify gadget driver of the 1841df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * disconnection, and so on. 1842df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * 1843df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * Our suggested workaround is to follow the Disconnect 1844df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * Event steps here, instead, based on a setup_packet_pending 1845df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * flag. Such flag gets set whenever we have a XferNotReady 1846df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * event on EP0 and gets cleared on XferComplete for the 1847df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * same endpoint. 1848df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * 1849df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * Refers to: 1850df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * 1851df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * STAR#9000466709: RTL: Device : Disconnect event not 1852df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * generated if setup packet pending in FIFO 1853df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi */ 1854df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi if (dwc->revision < DWC3_REVISION_188A) { 1855df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi if (dwc->setup_packet_pending) 1856df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi dwc3_gadget_disconnect_interrupt(dwc); 1857df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi } 1858df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi 1859961906edb549c95f4cc33e4f3dbfd0fcc364954dFelipe Balbi /* after reset -> Default State */ 1860961906edb549c95f4cc33e4f3dbfd0fcc364954dFelipe Balbi dwc->dev_state = DWC3_DEFAULT_STATE; 1861961906edb549c95f4cc33e4f3dbfd0fcc364954dFelipe Balbi 186272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* Enable PHYs */ 186372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_usb2_phy_power(dwc, true); 186472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_usb3_phy_power(dwc, true); 186572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 186672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dwc->gadget.speed != USB_SPEED_UNKNOWN) 186772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_disconnect_gadget(dwc); 186872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 186972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 187072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DCTL_TSTCTRL_MASK; 187172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 187272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 187372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_stop_active_transfers(dwc); 187472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_clear_stall_all_ep(dwc); 1875b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman dwc->start_config_issued = false; 187672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 187772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* Reset device address to zero */ 187872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCFG); 187972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~(DWC3_DCFG_DEVADDR_MASK); 188072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCFG, reg); 188172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 188272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 188372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_update_ram_clk_sel(struct dwc3 *dwc, u32 speed) 188472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 188572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 188672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 usb30_clock = DWC3_GCTL_CLK_BUS; 188772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 188872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 188972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We change the clock only at SS but I dunno why I would want to do 189072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * this. Maybe it becomes part of the power saving plan. 189172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 189272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 189372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (speed != DWC3_DSTS_SUPERSPEED) 189472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 189572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 189672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 189772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * RAMClkSel is reset to 0 after USB reset, so it must be reprogrammed 189872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * each time on Connect Done. 189972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 190072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!usb30_clock) 190172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 190272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 190372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_GCTL); 190472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg |= DWC3_GCTL_RAMCLKSEL(usb30_clock); 190572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_GCTL, reg); 190672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 190772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 190872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_disable_phy(struct dwc3 *dwc, u8 speed) 190972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 191072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (speed) { 191172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_SPEED_SUPER: 191272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_usb2_phy_power(dwc, false); 191372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 191472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_SPEED_HIGH: 191572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_SPEED_FULL: 191672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_SPEED_LOW: 191772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_usb3_phy_power(dwc, false); 191872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 191972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 192072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 192172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 192272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_conndone_interrupt(struct dwc3 *dwc) 192372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 192472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 192572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 192672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 192772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 192872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 speed; 192972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 193072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s\n", __func__); 193172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 193272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0x00, sizeof(params)); 193372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 193472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 193572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi speed = reg & DWC3_DSTS_CONNECTSPD; 193672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->speed = speed; 193772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 193872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_update_ram_clk_sel(dwc, speed); 193972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 194072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (speed) { 194172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DCFG_SUPERSPEED: 194205870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi /* 194305870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * WORKAROUND: DWC3 revisions <1.90a have an issue which 194405870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * would cause a missing USB3 Reset event. 194505870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * 194605870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * In such situations, we should force a USB3 Reset 194705870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * event by calling our dwc3_gadget_reset_interrupt() 194805870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * routine. 194905870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * 195005870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * Refers to: 195105870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * 195205870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * STAR#9000483510: RTL: SS : USB3 reset event may 195305870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * not be generated always when the link enters poll 195405870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi */ 195505870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi if (dwc->revision < DWC3_REVISION_190A) 195605870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi dwc3_gadget_reset_interrupt(dwc); 195705870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi 195872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(512); 195972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ep0->maxpacket = 512; 196072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_SUPER; 196172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 196272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DCFG_HIGHSPEED: 196372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(64); 196472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ep0->maxpacket = 64; 196572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_HIGH; 196672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 196772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DCFG_FULLSPEED2: 196872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DCFG_FULLSPEED1: 196972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(64); 197072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ep0->maxpacket = 64; 197172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_FULL; 197272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 197372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DCFG_LOWSPEED: 197472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(8); 197572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ep0->maxpacket = 8; 197672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_LOW; 197772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 197872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 197972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 198072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* Disable unneded PHY */ 198172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_disable_phy(dwc, dwc->gadget.speed); 198272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 198372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[0]; 1984c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL); 198572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 198672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to enable %s\n", dep->name); 198772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 198872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 198972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 199072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[1]; 1991c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL); 199272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 199372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to enable %s\n", dep->name); 199472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 199572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 199672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 199772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 199872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Configure PHY via GUSB3PIPECTLn if required. 199972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 200072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Update GTXFIFOSIZn 200172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 200272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * In both cases reset values should be sufficient. 200372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 200472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 200572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 200672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_wakeup_interrupt(struct dwc3 *dwc) 200772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 200872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s\n", __func__); 200972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 201072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 201172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * TODO take core out of low power mode when that's 201272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * implemented. 201372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 201472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 201572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver->resume(&dwc->gadget); 201672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 201772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 201872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_linksts_change_interrupt(struct dwc3 *dwc, 201972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned int evtinfo) 202072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 2021fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi enum dwc3_link_state next = evtinfo & DWC3_LINK_STATE_MASK; 2022fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 2023fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi /* 2024fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * WORKAROUND: DWC3 Revisions <1.83a have an issue which, depending 2025fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * on the link partner, the USB session might do multiple entry/exit 2026fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * of low power states before a transfer takes place. 2027fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * 2028fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * Due to this problem, we might experience lower throughput. The 2029fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * suggested workaround is to disable DCTL[12:9] bits if we're 2030fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * transitioning from U1/U2 to U0 and enable those bits again 2031fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * after a transfer completes and there are no pending transfers 2032fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * on any of the enabled endpoints. 2033fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * 2034fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * This is the first half of that workaround. 2035fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * 2036fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * Refers to: 2037fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * 2038fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * STAR#9000446952: RTL: Device SS : if U1/U2 ->U0 takes >128us 2039fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * core send LGO_Ux entering U0 2040fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi */ 2041fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi if (dwc->revision < DWC3_REVISION_183A) { 2042fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi if (next == DWC3_LINK_STATE_U0) { 2043fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi u32 u1u2; 2044fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi u32 reg; 2045fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 2046fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi switch (dwc->link_state) { 2047fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi case DWC3_LINK_STATE_U1: 2048fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi case DWC3_LINK_STATE_U2: 2049fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 2050fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi u1u2 = reg & (DWC3_DCTL_INITU2ENA 2051fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi | DWC3_DCTL_ACCEPTU2ENA 2052fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi | DWC3_DCTL_INITU1ENA 2053fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi | DWC3_DCTL_ACCEPTU1ENA); 2054fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 2055fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi if (!dwc->u1u2) 2056fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi dwc->u1u2 = reg & u1u2; 2057fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 2058fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi reg &= ~u1u2; 2059fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 2060fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 2061fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi break; 2062fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi default: 2063fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi /* do nothing */ 2064fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi break; 2065fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi } 2066fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi } 2067fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi } 2068fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 2069fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi dwc->link_state = next; 2070019ac83252dc2b356cb0ca81c25a077ec90309e7Felipe Balbi 2071019ac83252dc2b356cb0ca81c25a077ec90309e7Felipe Balbi dev_vdbg(dwc->dev, "%s link %d\n", __func__, dwc->link_state); 207272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 207372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 207472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_interrupt(struct dwc3 *dwc, 207572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct dwc3_event_devt *event) 207672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 207772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (event->type) { 207872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_DISCONNECT: 207972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_disconnect_interrupt(dwc); 208072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 208172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_RESET: 208272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_reset_interrupt(dwc); 208372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 208472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_CONNECT_DONE: 208572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_conndone_interrupt(dwc); 208672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 208772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_WAKEUP: 208872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_wakeup_interrupt(dwc); 208972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 209072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_LINK_STATUS_CHANGE: 209172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_linksts_change_interrupt(dwc, event->event_info); 209272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 209372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_EOPF: 209472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "End of Periodic Frame\n"); 209572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 209672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_SOF: 209772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "Start of Periodic Frame\n"); 209872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 209972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_ERRATIC_ERROR: 210072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "Erratic Error\n"); 210172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 210272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_CMD_CMPL: 210372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "Command Complete\n"); 210472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 210572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_OVERFLOW: 210672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "Overflow\n"); 210772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 210872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 210972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "UNKNOWN IRQ %d\n", event->type); 211072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 211172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 211272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 211372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_process_event_entry(struct dwc3 *dwc, 211472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const union dwc3_event *event) 211572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 211672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* Endpoint IRQ, handle it and return early */ 211772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (event->type.is_devspec == 0) { 211872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* depevt */ 211972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return dwc3_endpoint_interrupt(dwc, &event->depevt); 212072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 212172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 212272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (event->type.type) { 212372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_EVENT_TYPE_DEV: 212472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_interrupt(dwc, &event->devt); 212572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 212672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* REVISIT what to do with Carkit and I2C events ? */ 212772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 212872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "UNKNOWN IRQ type %d\n", event->raw); 212972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 213072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 213172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 213272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic irqreturn_t dwc3_process_event_buf(struct dwc3 *dwc, u32 buf) 213372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 213472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_event_buffer *evt; 213572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int left; 213672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 count; 213772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 213872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi count = dwc3_readl(dwc->regs, DWC3_GEVNTCOUNT(buf)); 213972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi count &= DWC3_GEVNTCOUNT_MASK; 214072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!count) 214172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return IRQ_NONE; 214272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 214372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi evt = dwc->ev_buffs[buf]; 214472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi left = count; 214572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 214672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi while (left > 0) { 214772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi union dwc3_event event; 214872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 214972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memcpy(&event.raw, (evt->buf + evt->lpos), sizeof(event.raw)); 215072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_process_event_entry(dwc, &event); 215172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 215272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * XXX we wrap around correctly to the next entry as almost all 215372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * entries are 4 bytes in size. There is one entry which has 12 215472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * bytes which is a regular entry followed by 8 bytes data. ATM 215572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * I don't know how things are organized if were get next to the 215672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * a boundary so I worry about that once we try to handle that. 215772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 215872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi evt->lpos = (evt->lpos + 4) % DWC3_EVENT_BUFFERS_SIZE; 215972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi left -= 4; 216072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 216172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_GEVNTCOUNT(buf), 4); 216272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 216372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 216472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return IRQ_HANDLED; 216572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 216672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 216772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic irqreturn_t dwc3_interrupt(int irq, void *_dwc) 216872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 216972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = _dwc; 217072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int i; 217172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi irqreturn_t ret = IRQ_NONE; 217272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 217372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock(&dwc->lock); 217472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 21759f622b2a407d8b34a5a7f5b4abd8b29b25cf4f32Felipe Balbi for (i = 0; i < dwc->num_event_buffers; i++) { 217672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi irqreturn_t status; 217772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 217872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi status = dwc3_process_event_buf(dwc, i); 217972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (status == IRQ_HANDLED) 218072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = status; 218172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 218272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 218372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock(&dwc->lock); 218472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 218572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 218672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 218772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 218872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/** 218972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * dwc3_gadget_init - Initializes gadget related registers 219072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * @dwc: Pointer to out controller context structure 219172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 219272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Returns 0 on success otherwise negative errno. 219372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 219472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiint __devinit dwc3_gadget_init(struct dwc3 *dwc) 219572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 219672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 219772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 219872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int irq; 219972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 220072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ctrl_req = dma_alloc_coherent(dwc->dev, sizeof(*dwc->ctrl_req), 220172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi &dwc->ctrl_req_addr, GFP_KERNEL); 220272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dwc->ctrl_req) { 220372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to allocate ctrl request\n"); 220472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -ENOMEM; 220572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto err0; 220672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 220772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 220872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ep0_trb = dma_alloc_coherent(dwc->dev, sizeof(*dwc->ep0_trb), 220972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi &dwc->ep0_trb_addr, GFP_KERNEL); 221072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dwc->ep0_trb) { 221172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to allocate ep0 trb\n"); 221272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -ENOMEM; 221372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto err1; 221472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 221572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 221672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->setup_buf = dma_alloc_coherent(dwc->dev, 221772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi sizeof(*dwc->setup_buf) * 2, 221872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi &dwc->setup_buf_addr, GFP_KERNEL); 221972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dwc->setup_buf) { 222072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to allocate setup buffer\n"); 222172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -ENOMEM; 222272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto err2; 222372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 222472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 22255812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi dwc->ep0_bounce = dma_alloc_coherent(dwc->dev, 22265812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi 512, &dwc->ep0_bounce_addr, GFP_KERNEL); 22275812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi if (!dwc->ep0_bounce) { 22285812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi dev_err(dwc->dev, "failed to allocate ep0 bounce buffer\n"); 22295812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi ret = -ENOMEM; 22305812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi goto err3; 22315812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi } 22325812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi 223372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_set_name(&dwc->gadget.dev, "gadget"); 223472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 223572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ops = &dwc3_gadget_ops; 2236d327ab5b6d660d6fe22b073b743fde1668e593bbMichal Nazarewicz dwc->gadget.max_speed = USB_SPEED_SUPER; 223772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_UNKNOWN; 223872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.dev.parent = dwc->dev; 2239eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dwc->gadget.sg_supported = true; 224072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 224172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_set_coherent_mask(&dwc->gadget.dev, dwc->dev->coherent_dma_mask); 224272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 224372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.dev.dma_parms = dwc->dev->dma_parms; 224472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.dev.dma_mask = dwc->dev->dma_mask; 224572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.dev.release = dwc3_gadget_release; 224672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.name = "dwc3-gadget"; 224772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 224872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 224972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * REVISIT: Here we should clear all pending IRQs to be 225072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * sure we're starting from a well known location. 225172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 225272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 225372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_gadget_init_endpoints(dwc); 225472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 22555812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi goto err4; 225672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 225772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi irq = platform_get_irq(to_platform_device(dwc->dev), 0); 225872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 225972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = request_irq(irq, dwc3_interrupt, IRQF_SHARED, 226072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi "dwc3", dwc); 226172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 226272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to request irq #%d --> %d\n", 226372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi irq, ret); 22645812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi goto err5; 226572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 226672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 226772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* Enable all but Start and End of Frame IRQs */ 226872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = (DWC3_DEVTEN_VNDRDEVTSTRCVEDEN | 226972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEVTEN_EVNTOVERFLOWEN | 227072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEVTEN_CMDCMPLTEN | 227172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEVTEN_ERRTICERREN | 227272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEVTEN_WKUPEVTEN | 227372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEVTEN_ULSTCNGEN | 227472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEVTEN_CONNECTDONEEN | 227572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEVTEN_USBRSTEN | 227672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEVTEN_DISCONNEVTEN); 227772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEVTEN, reg); 227872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 227972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = device_register(&dwc->gadget.dev); 228072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 228172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to register gadget device\n"); 228272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi put_device(&dwc->gadget.dev); 22835812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi goto err6; 228472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 228572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 228672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = usb_add_gadget_udc(dwc->dev, &dwc->gadget); 228772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 228872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to register udc\n"); 22895812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi goto err7; 229072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 229172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 229272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 229372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 22945812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbierr7: 229572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi device_unregister(&dwc->gadget.dev); 229672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 22975812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbierr6: 229872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEVTEN, 0x00); 229972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi free_irq(irq, dwc); 230072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 23015812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbierr5: 230272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_free_endpoints(dwc); 230372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 23045812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbierr4: 23055812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi dma_free_coherent(dwc->dev, 512, dwc->ep0_bounce, 23065812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi dwc->ep0_bounce_addr); 23075812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi 230872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbierr3: 230972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(*dwc->setup_buf) * 2, 231072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->setup_buf, dwc->setup_buf_addr); 231172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 231272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbierr2: 231372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(*dwc->ep0_trb), 231472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ep0_trb, dwc->ep0_trb_addr); 231572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 231672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbierr1: 231772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(*dwc->ctrl_req), 231872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ctrl_req, dwc->ctrl_req_addr); 231972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 232072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbierr0: 232172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 232272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 232372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 232472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbivoid dwc3_gadget_exit(struct dwc3 *dwc) 232572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 232672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int irq; 232772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 232872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi usb_del_gadget_udc(&dwc->gadget); 232972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi irq = platform_get_irq(to_platform_device(dwc->dev), 0); 233072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 233172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEVTEN, 0x00); 233272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi free_irq(irq, dwc); 233372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 233472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_free_endpoints(dwc); 233572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 23365812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi dma_free_coherent(dwc->dev, 512, dwc->ep0_bounce, 23375812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi dwc->ep0_bounce_addr); 23385812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi 233972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(*dwc->setup_buf) * 2, 234072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->setup_buf, dwc->setup_buf_addr); 234172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 234272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(*dwc->ep0_trb), 234372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ep0_trb, dwc->ep0_trb_addr); 234472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 234572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(*dwc->ctrl_req), 234672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ctrl_req, dwc->ctrl_req_addr); 234772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 234872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi device_unregister(&dwc->gadget.dev); 234972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 2350