gadget.c revision c7fcdeb2627c46b7ec3f0bcb2054b10405f9a70e
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 * All rights reserved. 672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Authors: Felipe Balbi <balbi@ti.com>, 872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Sebastian Andrzej Siewior <bigeasy@linutronix.de> 972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 1072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Redistribution and use in source and binary forms, with or without 1172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * modification, are permitted provided that the following conditions 1272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * are met: 1372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 1. Redistributions of source code must retain the above copyright 1472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * notice, this list of conditions, and the following disclaimer, 1572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * without modification. 1672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 2. Redistributions in binary form must reproduce the above copyright 1772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * notice, this list of conditions and the following disclaimer in the 1872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * documentation and/or other materials provided with the distribution. 1972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 3. The names of the above-listed copyright holders may not be used 2072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * to endorse or promote products derived from this software without 2172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * specific prior written permission. 2272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 2372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * ALTERNATIVELY, this software may be distributed under the terms of the 2472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * GNU General Public License ("GPL") version 2, as published by the Free 2572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Software Foundation. 2672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 2772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS 2872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 2972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 3072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 3172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 3272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 3372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 3472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 3572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 3672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 3772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 3872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 3972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 4072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/kernel.h> 4172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/delay.h> 4272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/slab.h> 4372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/spinlock.h> 4472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/platform_device.h> 4572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/pm_runtime.h> 4672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/interrupt.h> 4772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/io.h> 4872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/list.h> 4972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/dma-mapping.h> 5072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 5172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/usb/ch9.h> 5272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/usb/gadget.h> 5372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 5472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include "core.h" 5572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include "gadget.h" 5672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include "io.h" 5772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 5872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#define DMA_ADDR_INVALID (~(dma_addr_t)0) 5972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 6072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbivoid dwc3_map_buffer_to_dma(struct dwc3_request *req) 6172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 6272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = req->dep->dwc; 6372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 6472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (req->request.dma == DMA_ADDR_INVALID) { 6572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.dma = dma_map_single(dwc->dev, req->request.buf, 6672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.length, req->direction 6772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ? DMA_TO_DEVICE : DMA_FROM_DEVICE); 6872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->mapped = true; 6972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 7072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_sync_single_for_device(dwc->dev, req->request.dma, 7172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.length, req->direction 7272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ? DMA_TO_DEVICE : DMA_FROM_DEVICE); 7372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->mapped = false; 7472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 7572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 7672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 7772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbivoid dwc3_unmap_buffer_from_dma(struct dwc3_request *req) 7872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 7972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = req->dep->dwc; 8072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 8172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (req->mapped) { 8272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_unmap_single(dwc->dev, req->request.dma, 8372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.length, req->direction 8472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ? DMA_TO_DEVICE : DMA_FROM_DEVICE); 8572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->mapped = 0; 86f198ead21bcb7b03d7bb2cba7ba0f5ad615a3862Felipe Balbi req->request.dma = DMA_ADDR_INVALID; 8772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 8872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_sync_single_for_cpu(dwc->dev, req->request.dma, 8972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.length, req->direction 9072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ? DMA_TO_DEVICE : DMA_FROM_DEVICE); 9172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 9272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 9372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 9472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbivoid dwc3_gadget_giveback(struct dwc3_ep *dep, struct dwc3_request *req, 9572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int status) 9672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 9772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 9872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 9972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (req->queued) { 10072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->busy_slot++; 10172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 10272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Skip LINK TRB. We can't use req->trb and check for 10372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * DWC3_TRBCTL_LINK_TRB because it points the TRB we just 10472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * completed (not the LINK TRB). 10572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 10672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (((dep->busy_slot & DWC3_TRB_MASK) == DWC3_TRB_NUM - 1) && 10772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi usb_endpoint_xfer_isoc(dep->desc)) 10872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->busy_slot++; 10972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 11072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_del(&req->list); 11172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 11272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (req->request.status == -EINPROGRESS) 11372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.status = status; 11472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 11572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_unmap_buffer_from_dma(req); 11672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 11772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "request %p from %s completed %d/%d ===> %d\n", 11872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req, dep->name, req->request.actual, 11972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.length, status); 12072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 12172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock(&dwc->lock); 12272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.complete(&req->dep->endpoint, &req->request); 12372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock(&dwc->lock); 12472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 12572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 12672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic const char *dwc3_gadget_ep_cmd_string(u8 cmd) 12772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 12872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (cmd) { 12972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_DEPSTARTCFG: 13072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Start New Configuration"; 13172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_ENDTRANSFER: 13272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "End Transfer"; 13372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_UPDATETRANSFER: 13472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Update Transfer"; 13572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_STARTTRANSFER: 13672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Start Transfer"; 13772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_CLEARSTALL: 13872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Clear Stall"; 13972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_SETSTALL: 14072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Set Stall"; 14172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_GETSEQNUMBER: 14272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Get Data Sequence Number"; 14372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_SETTRANSFRESOURCE: 14472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Set Endpoint Transfer Resource"; 14572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_SETEPCONFIG: 14672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Set Endpoint Configuration"; 14772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 14872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "UNKNOWN command"; 14972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 15072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 15172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 15272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiint dwc3_send_gadget_ep_cmd(struct dwc3 *dwc, unsigned ep, 15372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned cmd, struct dwc3_gadget_ep_cmd_params *params) 15472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 15572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = dwc->eps[ep]; 15672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long timeout = 500; 15772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 15872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 15972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s: cmd '%s' params %08x %08x %08x\n", 16072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name, 16172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_ep_cmd_string(cmd), params->param0.raw, 16272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi params->param1.raw, params->param2.raw); 16372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 16472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEPCMDPAR0(ep), params->param0.raw); 16572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEPCMDPAR1(ep), params->param1.raw); 16672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEPCMDPAR2(ep), params->param2.raw); 16772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 16872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEPCMD(ep), cmd | DWC3_DEPCMD_CMDACT); 16972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi do { 17072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DEPCMD(ep)); 17172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(reg & DWC3_DEPCMD_CMDACT)) { 172164f6e141ed214bda30fb219d41ec3254bd90886Felipe Balbi dev_vdbg(dwc->dev, "Command Complete --> %d\n", 173164f6e141ed214bda30fb219d41ec3254bd90886Felipe Balbi DWC3_DEPCMD_STATUS(reg)); 17472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 17572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 17672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 17772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 17872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * XXX Figure out a sane timeout here. 500ms is way too much. 17972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We can't sleep here, because it is also called from 18072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * interrupt context. 18172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 18272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi timeout--; 18372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!timeout) 18472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -ETIMEDOUT; 18572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 18672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi mdelay(1); 18772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } while (1); 18872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 18972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 19072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic dma_addr_t dwc3_trb_dma_offset(struct dwc3_ep *dep, 19172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_trb_hw *trb) 19272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 19372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 offset = trb - dep->trb_pool; 19472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 19572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return dep->trb_pool_dma + offset; 19672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 19772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 19872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_alloc_trb_pool(struct dwc3_ep *dep) 19972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 20072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 20172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 20272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->trb_pool) 20372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 20472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 20572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->number == 0 || dep->number == 1) 20672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 20772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 20872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->trb_pool = dma_alloc_coherent(dwc->dev, 20972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi sizeof(struct dwc3_trb) * DWC3_TRB_NUM, 21072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi &dep->trb_pool_dma, GFP_KERNEL); 21172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dep->trb_pool) { 21272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dep->dwc->dev, "failed to allocate trb pool for %s\n", 21372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 21472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -ENOMEM; 21572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 21672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 21772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 21872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 21972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 22072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_free_trb_pool(struct dwc3_ep *dep) 22172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 22272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 22372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 22472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(struct dwc3_trb) * DWC3_TRB_NUM, 22572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->trb_pool, dep->trb_pool_dma); 22672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 22772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->trb_pool = NULL; 22872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->trb_pool_dma = 0; 22972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 23072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 23172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_start_config(struct dwc3 *dwc, struct dwc3_ep *dep) 23272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 23372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 23472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 cmd; 23572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 23672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0x00, sizeof(params)); 23772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 23872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->number != 1) { 23972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd = DWC3_DEPCMD_DEPSTARTCFG; 24072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* XferRscIdx == 0 for ep0 and 2 for the remaining */ 24172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->number > 1) 24272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd |= DWC3_DEPCMD_PARAM(2); 24372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 24472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return dwc3_send_gadget_ep_cmd(dwc, 0, cmd, ¶ms); 24572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 24672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 24772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 24872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 24972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 25072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_set_ep_config(struct dwc3 *dwc, struct dwc3_ep *dep, 25172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct usb_endpoint_descriptor *desc) 25272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 25372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 25472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 25572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0x00, sizeof(params)); 25672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 25772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi params.param0.depcfg.ep_type = usb_endpoint_type(desc); 25829cc88979a8818cd8c5019426e945aed118b400eKuninori Morimoto params.param0.depcfg.max_packet_size = usb_endpoint_maxp(desc); 25972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 26072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi params.param1.depcfg.xfer_complete_enable = true; 26172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi params.param1.depcfg.xfer_not_ready_enable = true; 26272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 26372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (usb_endpoint_xfer_isoc(desc)) 26472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi params.param1.depcfg.xfer_in_progress_enable = true; 26572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 26672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 26772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We are doing 1:1 mapping for endpoints, meaning 26872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Physical Endpoints 2 maps to Logical Endpoint 2 and 26972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * so on. We consider the direction bit as part of the physical 27072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * endpoint number. So USB endpoint 0x81 is 0x03. 27172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 27272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi params.param1.depcfg.ep_number = dep->number; 27372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 27472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 27572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We must use the lower 16 TX FIFOs even though 27672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * HW might have more 27772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 27872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->direction) 27972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi params.param0.depcfg.fifo_number = dep->number >> 1; 28072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 28172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (desc->bInterval) { 28272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi params.param1.depcfg.binterval_m1 = desc->bInterval - 1; 28372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->interval = 1 << (desc->bInterval - 1); 28472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 28572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 28672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return dwc3_send_gadget_ep_cmd(dwc, dep->number, 28772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEPCMD_SETEPCONFIG, ¶ms); 28872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 28972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 29072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_set_xfer_resource(struct dwc3 *dwc, struct dwc3_ep *dep) 29172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 29272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 29372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 29472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0x00, sizeof(params)); 29572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 29672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi params.param0.depxfercfg.number_xfer_resources = 1; 29772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 29872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return dwc3_send_gadget_ep_cmd(dwc, dep->number, 29972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEPCMD_SETTRANSFRESOURCE, ¶ms); 30072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 30172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 30272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/** 30372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * __dwc3_gadget_ep_enable - Initializes a HW endpoint 30472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * @dep: endpoint to be initialized 30572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * @desc: USB Endpoint Descriptor 30672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 30772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Caller should take care of locking 30872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 30972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int __dwc3_gadget_ep_enable(struct dwc3_ep *dep, 31072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct usb_endpoint_descriptor *desc) 31172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 31272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 31372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 31472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret = -ENOMEM; 31572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 31672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) { 31772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_gadget_start_config(dwc, dep); 31872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 31972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 32072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 32172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 32272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_gadget_set_ep_config(dwc, dep, desc); 32372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 32472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 32572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 32672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) { 32772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_trb_hw *trb_st_hw; 32872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_trb_hw *trb_link_hw; 32972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_trb trb_link; 33072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 33172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_gadget_set_xfer_resource(dwc, dep); 33272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 33372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 33472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 33572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->desc = desc; 33672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->type = usb_endpoint_type(desc); 33772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags |= DWC3_EP_ENABLED; 33872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 33972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DALEPENA); 34072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg |= DWC3_DALEPENA_EP(dep->number); 34172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DALEPENA, reg); 34272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 34372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!usb_endpoint_xfer_isoc(desc)) 34472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 34572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 34672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(&trb_link, 0, sizeof(trb_link)); 34772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 34872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* Link TRB for ISOC. The HWO but is never reset */ 34972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trb_st_hw = &dep->trb_pool[0]; 35072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 35172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trb_link.bplh = dwc3_trb_dma_offset(dep, trb_st_hw); 35272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trb_link.trbctl = DWC3_TRBCTL_LINK_TRB; 35372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trb_link.hwo = true; 35472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 35572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trb_link_hw = &dep->trb_pool[DWC3_TRB_NUM - 1]; 35672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_trb_to_hw(&trb_link, trb_link_hw); 35772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 35872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 35972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 36072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 36172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 36272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_nuke_reqs(struct dwc3_ep *dep, const int status) 36372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 36472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req; 36572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 36672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi while (!list_empty(&dep->request_list)) { 36772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req = next_request(&dep->request_list); 36872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 36972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_giveback(dep, req, status); 37072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 37172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* nuke queued TRBs as well on command complete */ 37272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags |= DWC3_EP_WILL_SHUTDOWN; 37372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 37472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 37572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/** 37672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * __dwc3_gadget_ep_disable - Disables a HW endpoint 37772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * @dep: the endpoint to disable 37872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 37972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Caller should take care of locking 38072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 38172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_stop_active_transfer(struct dwc3 *dwc, u32 epnum); 38272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int __dwc3_gadget_ep_disable(struct dwc3_ep *dep) 38372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 38472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 38572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 38672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 38772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags &= ~DWC3_EP_ENABLED; 38872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_stop_active_transfer(dwc, dep->number); 38972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_nuke_reqs(dep, -ESHUTDOWN); 39072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 39172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DALEPENA); 39272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DALEPENA_EP(dep->number); 39372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DALEPENA, reg); 39472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 39572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->desc = NULL; 39672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->type = 0; 39772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 39872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 39972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 40072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 40172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 40272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 40372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep0_enable(struct usb_ep *ep, 40472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct usb_endpoint_descriptor *desc) 40572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 40672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EINVAL; 40772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 40872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 40972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep0_disable(struct usb_ep *ep) 41072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 41172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EINVAL; 41272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 41372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 41472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 41572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 41672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_enable(struct usb_ep *ep, 41772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct usb_endpoint_descriptor *desc) 41872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 41972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 42072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc; 42172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 42272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 42372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 42472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!ep || !desc || desc->bDescriptorType != USB_DT_ENDPOINT) { 42572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi pr_debug("dwc3: invalid parameters\n"); 42672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EINVAL; 42772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 42872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 42972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!desc->wMaxPacketSize) { 43072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi pr_debug("dwc3: missing wMaxPacketSize\n"); 43172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EINVAL; 43272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 43372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 43472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = to_dwc3_ep(ep); 43572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc = dep->dwc; 43672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 43772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (usb_endpoint_type(desc)) { 43872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_ENDPOINT_XFER_CONTROL: 43972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi strncat(dep->name, "-control", sizeof(dep->name)); 44072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 44172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_ENDPOINT_XFER_ISOC: 44272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi strncat(dep->name, "-isoc", sizeof(dep->name)); 44372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 44472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_ENDPOINT_XFER_BULK: 44572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi strncat(dep->name, "-bulk", sizeof(dep->name)); 44672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 44772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_ENDPOINT_XFER_INT: 44872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi strncat(dep->name, "-int", sizeof(dep->name)); 44972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 45072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 45172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "invalid endpoint transfer type\n"); 45272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 45372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 45472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->flags & DWC3_EP_ENABLED) { 45572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_WARN_ONCE(dwc->dev, true, "%s is already enabled\n", 45672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 45772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 45872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 45972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 46072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "Enabling %s\n", dep->name); 46172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 46272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 46372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = __dwc3_gadget_ep_enable(dep, desc); 46472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 46572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 46672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 46772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 46872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 46972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_disable(struct usb_ep *ep) 47072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 47172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 47272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc; 47372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 47472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 47572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 47672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!ep) { 47772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi pr_debug("dwc3: invalid parameters\n"); 47872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EINVAL; 47972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 48072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 48172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = to_dwc3_ep(ep); 48272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc = dep->dwc; 48372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 48472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) { 48572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_WARN_ONCE(dwc->dev, true, "%s is already disabled\n", 48672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 48772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 48872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 48972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 49072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi snprintf(dep->name, sizeof(dep->name), "ep%d%s", 49172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->number >> 1, 49272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi (dep->number & 1) ? "in" : "out"); 49372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 49472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 49572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = __dwc3_gadget_ep_disable(dep); 49672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 49772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 49872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 49972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 50072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 50172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic struct usb_request *dwc3_gadget_ep_alloc_request(struct usb_ep *ep, 50272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi gfp_t gfp_flags) 50372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 50472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req; 50572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = to_dwc3_ep(ep); 50672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 50772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 50872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req = kzalloc(sizeof(*req), gfp_flags); 50972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!req) { 51072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "not enough memory\n"); 51172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return NULL; 51272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 51372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 51472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->epnum = dep->number; 51572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->dep = dep; 51672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.dma = DMA_ADDR_INVALID; 51772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 51872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return &req->request; 51972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 52072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 52172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_ep_free_request(struct usb_ep *ep, 52272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct usb_request *request) 52372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 52472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req = to_dwc3_request(request); 52572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 52672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi kfree(req); 52772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 52872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 52972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* 53072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * dwc3_prepare_trbs - setup TRBs from requests 53172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * @dep: endpoint for which requests are being prepared 53272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * @starting: true if the endpoint is idle and no requests are queued. 53372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 53472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * The functions goes through the requests list and setups TRBs for the 53572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * transfers. The functions returns once there are not more TRBs available or 53672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * it run out of requests. 53772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 53872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic struct dwc3_request *dwc3_prepare_trbs(struct dwc3_ep *dep, 53972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi bool starting) 54072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 54172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req, *n, *ret = NULL; 54272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_trb_hw *trb_hw; 54372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_trb trb; 54472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 trbs_left; 54572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 54672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi BUILD_BUG_ON_NOT_POWER_OF_2(DWC3_TRB_NUM); 54772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 54872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* the first request must not be queued */ 54972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trbs_left = (dep->busy_slot - dep->free_slot) & DWC3_TRB_MASK; 55072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 55172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * if busy & slot are equal than it is either full or empty. If we are 55272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * starting to proceed requests then we are empty. Otherwise we ar 55372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * full and don't do anything 55472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 55572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!trbs_left) { 55672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!starting) 55772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return NULL; 55872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trbs_left = DWC3_TRB_NUM; 55972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 56072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * In case we start from scratch, we queue the ISOC requests 56172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * starting from slot 1. This is done because we use ring 56272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * buffer and have no LST bit to stop us. Instead, we place 56372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * IOC bit TRB_NUM/4. We try to avoid to having an interrupt 56472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * after the first request so we start at slot 1 and have 56572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 7 requests proceed before we hit the first IOC. 56672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Other transfer types don't use the ring buffer and are 56772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * processed from the first TRB until the last one. Since we 56872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * don't wrap around we have to start at the beginning. 56972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 57072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (usb_endpoint_xfer_isoc(dep->desc)) { 57172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->busy_slot = 1; 57272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->free_slot = 1; 57372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 57472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->busy_slot = 0; 57572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->free_slot = 0; 57672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 57772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 57872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 57972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* The last TRB is a link TRB, not used for xfer */ 58072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if ((trbs_left <= 1) && usb_endpoint_xfer_isoc(dep->desc)) 58172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return NULL; 58272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 58372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_for_each_entry_safe(req, n, &dep->request_list, list) { 58472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned int last_one = 0; 58572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned int cur_slot; 58672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 58772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trb_hw = &dep->trb_pool[dep->free_slot & DWC3_TRB_MASK]; 58872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cur_slot = dep->free_slot; 58972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->free_slot++; 59072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 59172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* Skip the LINK-TRB on ISOC */ 59272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (((cur_slot & DWC3_TRB_MASK) == DWC3_TRB_NUM - 1) && 59372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi usb_endpoint_xfer_isoc(dep->desc)) 59472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi continue; 59572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 59672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_move_request_queued(req); 59772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(&trb, 0, sizeof(trb)); 59872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trbs_left--; 59972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 60072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* Is our TRB pool empty? */ 60172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!trbs_left) 60272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi last_one = 1; 60372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* Is this the last request? */ 60472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (list_empty(&dep->request_list)) 60572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi last_one = 1; 60672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 60772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 60872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * FIXME we shouldn't need to set LST bit always but we are 60972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * facing some weird problem with the Hardware where it doesn't 61072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * complete even though it has been previously started. 61172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 61272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * While we're debugging the problem, as a workaround to 61372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * multiple TRBs handling, use only one TRB at a time. 61472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 61572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi last_one = 1; 61672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 61772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->trb = trb_hw; 61872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!ret) 61972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = req; 62072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 62172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trb.bplh = req->request.dma; 62272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 62372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (usb_endpoint_xfer_isoc(dep->desc)) { 62472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trb.isp_imi = true; 62572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trb.csp = true; 62672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 62772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trb.lst = last_one; 62872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 62972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 63072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (usb_endpoint_type(dep->desc)) { 63172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_ENDPOINT_XFER_CONTROL: 63272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trb.trbctl = DWC3_TRBCTL_CONTROL_SETUP; 63372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 63472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 63572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_ENDPOINT_XFER_ISOC: 6365a18999ebd880f6fc4264aa5687daad4c4013bceSebastian Andrzej Siewior trb.trbctl = DWC3_TRBCTL_ISOCHRONOUS_FIRST; 63772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 63872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* IOC every DWC3_TRB_NUM / 4 so we can refill */ 63972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(cur_slot % (DWC3_TRB_NUM / 4))) 64072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trb.ioc = last_one; 64172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 64272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 64372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_ENDPOINT_XFER_BULK: 64472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_ENDPOINT_XFER_INT: 64572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trb.trbctl = DWC3_TRBCTL_NORMAL; 64672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 64772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 64872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 64972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * This is only possible with faulty memory because we 65072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * checked it already :) 65172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 65272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi BUG(); 65372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 65472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 65572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trb.length = req->request.length; 65672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trb.hwo = true; 65772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 65872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_trb_to_hw(&trb, trb_hw); 65972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->trb_dma = dwc3_trb_dma_offset(dep, trb_hw); 66072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 66172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (last_one) 66272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 66372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 66472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 66572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 66672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 66772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 66872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int __dwc3_gadget_kick_transfer(struct dwc3_ep *dep, u16 cmd_param, 66972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int start_new) 67072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 67172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 67272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req; 67372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 67472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 67572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 cmd; 67672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 67772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (start_new && (dep->flags & DWC3_EP_BUSY)) { 67872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s: endpoint busy\n", dep->name); 67972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EBUSY; 68072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 68172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags &= ~DWC3_EP_PENDING_REQUEST; 68272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 68372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 68472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * If we are getting here after a short-out-packet we don't enqueue any 68572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * new requests as we try to set the IOC bit only on the last request. 68672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 68772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (start_new) { 68872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (list_empty(&dep->req_queued)) 68972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_prepare_trbs(dep, start_new); 69072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 69172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* req points to the first request which will be sent */ 69272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req = next_request(&dep->req_queued); 69372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 69472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 69572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * req points to the first request where HWO changed 69672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * from 0 to 1 69772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 69872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req = dwc3_prepare_trbs(dep, start_new); 69972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 70072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!req) { 70172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags |= DWC3_EP_PENDING_REQUEST; 70272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 70372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 70472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 70572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0, sizeof(params)); 70672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi params.param0.depstrtxfer.transfer_desc_addr_high = 70772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi upper_32_bits(req->trb_dma); 70872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi params.param1.depstrtxfer.transfer_desc_addr_low = 70972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi lower_32_bits(req->trb_dma); 71072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 71172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (start_new) 71272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd = DWC3_DEPCMD_STARTTRANSFER; 71372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi else 71472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd = DWC3_DEPCMD_UPDATETRANSFER; 71572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 71672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd |= DWC3_DEPCMD_PARAM(cmd_param); 71772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, cmd, ¶ms); 71872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret < 0) { 71972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "failed to send STARTTRANSFER command\n"); 72072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 72172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 72272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * FIXME we need to iterate over the list of requests 72372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * here and stop, unmap, free and del each of the linked 72472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * requests instead of we do now. 72572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 72672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_unmap_buffer_from_dma(req); 72772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_del(&req->list); 72872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 72972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 73072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 73172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags |= DWC3_EP_BUSY; 73272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->res_trans_idx = dwc3_gadget_ep_get_transfer_index(dwc, 73372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->number); 73472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dep->res_trans_idx) 73572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi printk_once(KERN_ERR "%s() res_trans_idx is invalid\n", __func__); 73672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 73772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 73872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 73972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int __dwc3_gadget_ep_queue(struct dwc3_ep *dep, struct dwc3_request *req) 74072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 74172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.actual = 0; 74272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.status = -EINPROGRESS; 74372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->direction = dep->direction; 74472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->epnum = dep->number; 74572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 74672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 74772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We only add to our list of requests now and 74872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * start consuming the list once we get XferNotReady 74972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * IRQ. 75072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 75172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * That way, we avoid doing anything that we don't need 75272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * to do now and defer it until the point we receive a 75372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * particular token from the Host side. 75472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 75572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * This will also avoid Host cancelling URBs due to too 75672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * many NACKs. 75772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 75872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_map_buffer_to_dma(req); 75972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_add_tail(&req->list, &dep->request_list); 76072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 76172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 76272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * There is one special case: XferNotReady with 76372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * empty list of requests. We need to kick the 76472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * transfer here in that situation, otherwise 76572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * we will be NAKing forever. 76672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 76772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * If we get XferNotReady before gadget driver 76872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * has a chance to queue a request, we will ACK 76972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * the IRQ but won't be able to receive the data 77072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * until the next request is queued. The following 77172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * code is handling exactly that. 77272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 77372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->flags & DWC3_EP_PENDING_REQUEST) { 77472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 77572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int start_trans; 77672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 77772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi start_trans = 1; 77872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (usb_endpoint_xfer_isoc(dep->endpoint.desc) && 77972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags & DWC3_EP_BUSY) 78072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi start_trans = 0; 78172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 78272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = __dwc3_gadget_kick_transfer(dep, 0, start_trans); 78372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret && ret != -EBUSY) { 78472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 78572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 78672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "%s: failed to kick transfers\n", 78772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 78872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 78972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi }; 79072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 79172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 79272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 79372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 79472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_queue(struct usb_ep *ep, struct usb_request *request, 79572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi gfp_t gfp_flags) 79672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 79772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req = to_dwc3_request(request); 79872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = to_dwc3_ep(ep); 79972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 80072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 80172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 80272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 80372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 80472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 80572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dep->desc) { 80672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "trying to queue request %p to disabled %s\n", 80772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi request, ep->name); 80872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -ESHUTDOWN; 80972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 81072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 81172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "queing request %p to %s length %d\n", 81272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi request, ep->name, request->length); 81372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 81472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 81572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = __dwc3_gadget_ep_queue(dep, req); 81672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 81772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 81872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 81972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 82072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 82172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_dequeue(struct usb_ep *ep, 82272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct usb_request *request) 82372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 82472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req = to_dwc3_request(request); 82572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *r = NULL; 82672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 82772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = to_dwc3_ep(ep); 82872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 82972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 83072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 83172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret = 0; 83272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 83372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 83472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 83572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_for_each_entry(r, &dep->request_list, list) { 83672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (r == req) 83772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 83872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 83972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 84072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (r != req) { 84172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_for_each_entry(r, &dep->req_queued, list) { 84272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (r == req) 84372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 84472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 84572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (r == req) { 84672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* wait until it is processed */ 84772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_stop_active_transfer(dwc, dep->number); 84872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto out0; 84972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 85072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "request %p was not queued to %s\n", 85172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi request, ep->name); 85272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EINVAL; 85372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto out0; 85472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 85572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 85672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* giveback the request */ 85772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_giveback(dep, req, -ECONNRESET); 85872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 85972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiout0: 86072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 86172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 86272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 86372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 86472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 86572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiint __dwc3_gadget_ep_set_halt(struct dwc3_ep *dep, int value) 86672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 86772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 86872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 86972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 87072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 87172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0x00, sizeof(params)); 87272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 87372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (value) { 87472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->number == 0 || dep->number == 1) 87572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ep0state = EP0_STALL; 87672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 87772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, 87872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEPCMD_SETSTALL, ¶ms); 87972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 88072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to %s STALL on %s\n", 88172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi value ? "set" : "clear", 88272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 88372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi else 88472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags |= DWC3_EP_STALL; 88572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 88672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, 88772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEPCMD_CLEARSTALL, ¶ms); 88872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 88972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to %s STALL on %s\n", 89072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi value ? "set" : "clear", 89172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 89272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi else 89372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags &= ~DWC3_EP_STALL; 89472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 89572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 89672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 89772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 89872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_set_halt(struct usb_ep *ep, int value) 89972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 90072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = to_dwc3_ep(ep); 90172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 90272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 90372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 90472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 90572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 90672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 90772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 90872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 90972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (usb_endpoint_xfer_isoc(dep->desc)) { 91072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "%s is of Isochronous type\n", dep->name); 91172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EINVAL; 91272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto out; 91372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 91472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 91572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = __dwc3_gadget_ep_set_halt(dep, value); 91672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiout: 91772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 91872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 91972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 92072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 92172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 92272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_set_wedge(struct usb_ep *ep) 92372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 92472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = to_dwc3_ep(ep); 92572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 92672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags |= DWC3_EP_WEDGE; 92772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 92872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return usb_ep_set_halt(ep); 92972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 93072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 93172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 93272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 93372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic struct usb_endpoint_descriptor dwc3_gadget_ep0_desc = { 93472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .bLength = USB_DT_ENDPOINT_SIZE, 93572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .bDescriptorType = USB_DT_ENDPOINT, 93672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .bmAttributes = USB_ENDPOINT_XFER_CONTROL, 93772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi}; 93872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 93972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic const struct usb_ep_ops dwc3_gadget_ep0_ops = { 94072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .enable = dwc3_gadget_ep0_enable, 94172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .disable = dwc3_gadget_ep0_disable, 94272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .alloc_request = dwc3_gadget_ep_alloc_request, 94372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .free_request = dwc3_gadget_ep_free_request, 94472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .queue = dwc3_gadget_ep0_queue, 94572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .dequeue = dwc3_gadget_ep_dequeue, 94672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .set_halt = dwc3_gadget_ep_set_halt, 94772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .set_wedge = dwc3_gadget_ep_set_wedge, 94872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi}; 94972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 95072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic const struct usb_ep_ops dwc3_gadget_ep_ops = { 95172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .enable = dwc3_gadget_ep_enable, 95272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .disable = dwc3_gadget_ep_disable, 95372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .alloc_request = dwc3_gadget_ep_alloc_request, 95472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .free_request = dwc3_gadget_ep_free_request, 95572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .queue = dwc3_gadget_ep_queue, 95672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .dequeue = dwc3_gadget_ep_dequeue, 95772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .set_halt = dwc3_gadget_ep_set_halt, 95872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .set_wedge = dwc3_gadget_ep_set_wedge, 95972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi}; 96072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 96172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 96272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 96372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_get_frame(struct usb_gadget *g) 96472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 96572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 96672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 96772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 96872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 96972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return DWC3_DSTS_SOFFN(reg); 97072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 97172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 97272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_wakeup(struct usb_gadget *g) 97372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 97472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 97572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 97672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long timeout; 97772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 97872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 97972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 98072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 98172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret = 0; 98272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 98372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 link_state; 98472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 speed; 98572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 98672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 98772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 98872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 98972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * According to the Databook Remote wakeup request should 99072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * be issued only when the device is in early suspend state. 99172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 99272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We can check that via USB Link State bits in DSTS register. 99372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 99472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 99572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 99672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi speed = reg & DWC3_DSTS_CONNECTSPD; 99772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (speed == DWC3_DSTS_SUPERSPEED) { 99872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "no wakeup on SuperSpeed\n"); 99972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EINVAL; 100072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto out; 100172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 100272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 100372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi link_state = DWC3_DSTS_USBLNKST(reg); 100472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 100572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (link_state) { 100672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_LINK_STATE_RX_DET: /* in HS, means Early Suspend */ 100772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_LINK_STATE_U3: /* in HS, means SUSPEND */ 100872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 100972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 101072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "can't wakeup from link state %d\n", 101172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi link_state); 101272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EINVAL; 101372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto out; 101472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 101572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 101672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 101772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 101872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 101972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Switch link state to Recovery. In HS/FS/LS this means 102072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * RemoteWakeup Request 102172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 102272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg |= DWC3_DCTL_ULSTCHNG_RECOVERY; 102372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 102472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 102572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* wait for at least 2000us */ 102672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi usleep_range(2000, 2500); 102772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 102872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* write zeroes to Link Change Request */ 102972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DCTL_ULSTCHNGREQ_MASK; 103072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 103172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 103272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* pool until Link State change to ON */ 103372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi timeout = jiffies + msecs_to_jiffies(100); 103472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 103572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi while (!(time_after(jiffies, timeout))) { 103672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 103772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 103872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* in HS, means ON */ 103972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (DWC3_DSTS_USBLNKST(reg) == DWC3_LINK_STATE_U0) 104072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 104172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 104272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 104372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (DWC3_DSTS_USBLNKST(reg) != DWC3_LINK_STATE_U0) { 104472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to send remote wakeup\n"); 104572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EINVAL; 104672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 104772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 104872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiout: 104972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 105072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 105172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 105272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 105372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 105472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_set_selfpowered(struct usb_gadget *g, 105572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int is_selfpowered) 105672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 105772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 105872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 105972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->is_selfpowered = !!is_selfpowered; 106072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 106172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 106272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 106372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 106472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_run_stop(struct dwc3 *dwc, int is_on) 106572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 106672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 106772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long timeout = 500; 106872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 106972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 107072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (is_on) 107172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg |= DWC3_DCTL_RUN_STOP; 107272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi else 107372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DCTL_RUN_STOP; 107472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 107572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 107672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 107772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi do { 107872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 107972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (is_on) { 108072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(reg & DWC3_DSTS_DEVCTRLHLT)) 108172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 108272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 108372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (reg & DWC3_DSTS_DEVCTRLHLT) 108472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 108572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 108672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 108772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * XXX reduce the 500ms delay 108872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 108972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi timeout--; 109072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!timeout) 109172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 109272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi mdelay(1); 109372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } while (1); 109472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 109572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "gadget %s data soft-%s\n", 109672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver 109772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ? dwc->gadget_driver->function : "no-function", 109872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi is_on ? "connect" : "disconnect"); 109972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 110072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 110172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_pullup(struct usb_gadget *g, int is_on) 110272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 110372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 110472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 110572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 110672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi is_on = !!is_on; 110772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 110872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 110972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_run_stop(dwc, is_on); 111072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 111172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 111272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 111372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 111472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 111572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_start(struct usb_gadget *g, 111672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct usb_gadget_driver *driver) 111772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 111872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 111972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 112072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 112172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret = 0; 112272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 112372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 112472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 112572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 112672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dwc->gadget_driver) { 112772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "%s is already bound to %s\n", 112872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.name, 112972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver->driver.name); 113072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EBUSY; 113172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto err0; 113272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 113372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 113472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver = driver; 113572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.dev.driver = &driver->driver; 113672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 113772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_GCTL); 113872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 113972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 114072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * REVISIT: power down scale might be different 114172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * depending on PHY used, need to pass that via platform_data 114272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 114372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg |= DWC3_GCTL_PWRDNSCALE(0x61a) 114472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi | DWC3_GCTL_PRTCAPDIR(DWC3_GCTL_PRTCAP_DEVICE); 114572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_GCTL_DISSCRAMBLE; 114672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 114772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 114872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * WORKAROUND: DWC3 revisions <1.90a have a bug 114972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * when The device fails to connect at SuperSpeed 115072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * and falls back to high-speed mode which causes 115172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * the device to enter in a Connect/Disconnect loop 115272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 115372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dwc->revision < DWC3_REVISION_190A) 115472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg |= DWC3_GCTL_U2RSTECN; 115572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 115672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_GCTL, reg); 115772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 115872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCFG); 115972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~(DWC3_DCFG_SPEED_MASK); 116072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg |= DWC3_DCFG_SUPERSPEED; 116172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCFG, reg); 116272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 116372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* Start with SuperSpeed Default */ 116472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(512); 116572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 116672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[0]; 116772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc); 116872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 116972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to enable %s\n", dep->name); 117072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto err0; 117172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 117272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 117372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[1]; 117472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc); 117572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 117672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to enable %s\n", dep->name); 117772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto err1; 117872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 117972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 118072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* begin to receive SETUP packets */ 1181c7fcdeb2627c46b7ec3f0bcb2054b10405f9a70eFelipe Balbi dwc->ep0state = EP0_SETUP_PHASE; 118272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_ep0_out_start(dwc); 118372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 118472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 118572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 118672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 118772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 118872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbierr1: 118972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi __dwc3_gadget_ep_disable(dwc->eps[0]); 119072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 119172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbierr0: 119272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 119372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 119472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 119572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 119672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 119772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_stop(struct usb_gadget *g, 119872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct usb_gadget_driver *driver) 119972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 120072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 120172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 120272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 120372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 120472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 120572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi __dwc3_gadget_ep_disable(dwc->eps[0]); 120672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi __dwc3_gadget_ep_disable(dwc->eps[1]); 120772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 120872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver = NULL; 120972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.dev.driver = NULL; 121072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 121172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 121272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 121372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 121472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 121572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic const struct usb_gadget_ops dwc3_gadget_ops = { 121672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .get_frame = dwc3_gadget_get_frame, 121772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .wakeup = dwc3_gadget_wakeup, 121872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .set_selfpowered = dwc3_gadget_set_selfpowered, 121972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .pullup = dwc3_gadget_pullup, 122072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .udc_start = dwc3_gadget_start, 122172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .udc_stop = dwc3_gadget_stop, 122272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi}; 122372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 122472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 122572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 122672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int __devinit dwc3_gadget_init_endpoints(struct dwc3 *dwc) 122772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 122872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 122972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 epnum; 123072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 123172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi INIT_LIST_HEAD(&dwc->gadget.ep_list); 123272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 123372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi for (epnum = 0; epnum < DWC3_ENDPOINTS_NUM; epnum++) { 123472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = kzalloc(sizeof(*dep), GFP_KERNEL); 123572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dep) { 123672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "can't allocate endpoint %d\n", 123772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi epnum); 123872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -ENOMEM; 123972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 124072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 124172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->dwc = dwc; 124272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->number = epnum; 124372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->eps[epnum] = dep; 124472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 124572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi snprintf(dep->name, sizeof(dep->name), "ep%d%s", epnum >> 1, 124672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi (epnum & 1) ? "in" : "out"); 124772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->endpoint.name = dep->name; 124872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->direction = (epnum & 1); 124972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 125072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (epnum == 0 || epnum == 1) { 125172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->endpoint.maxpacket = 512; 125272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->endpoint.ops = &dwc3_gadget_ep0_ops; 125372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!epnum) 125472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ep0 = &dep->endpoint; 125572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 125672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 125772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 125872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->endpoint.maxpacket = 1024; 125972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->endpoint.ops = &dwc3_gadget_ep_ops; 126072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_add_tail(&dep->endpoint.ep_list, 126172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi &dwc->gadget.ep_list); 126272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 126372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_alloc_trb_pool(dep); 126472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 126572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "%s: failed to allocate TRB pool\n", dep->name); 126672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 126772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 126872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 126972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi INIT_LIST_HEAD(&dep->request_list); 127072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi INIT_LIST_HEAD(&dep->req_queued); 127172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 127272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 127372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 127472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 127572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 127672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_free_endpoints(struct dwc3 *dwc) 127772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 127872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 127972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 epnum; 128072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 128172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi for (epnum = 0; epnum < DWC3_ENDPOINTS_NUM; epnum++) { 128272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[epnum]; 128372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_free_trb_pool(dep); 128472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 128572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (epnum != 0 && epnum != 1) 128672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_del(&dep->endpoint.ep_list); 128772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 128872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi kfree(dep); 128972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 129072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 129172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 129272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_release(struct device *dev) 129372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 129472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dev, "%s\n", __func__); 129572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 129672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 129772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 129872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_cleanup_done_reqs(struct dwc3 *dwc, struct dwc3_ep *dep, 129972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct dwc3_event_depevt *event, int status) 130072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 130172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req; 130272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_trb trb; 130372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned int count; 130472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned int s_pkt = 0; 130572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 130672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi do { 130772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req = next_request(&dep->req_queued); 130872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!req) 130972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 131072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 131172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_trb_to_nat(req->trb, &trb); 131272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 13130d2f4758530d1598087d1d2f3e75b4f7d17fc6c7Sebastian Andrzej Siewior if (trb.hwo && status != -ESHUTDOWN) 13140d2f4758530d1598087d1d2f3e75b4f7d17fc6c7Sebastian Andrzej Siewior /* 13150d2f4758530d1598087d1d2f3e75b4f7d17fc6c7Sebastian Andrzej Siewior * We continue despite the error. There is not much we 13160d2f4758530d1598087d1d2f3e75b4f7d17fc6c7Sebastian Andrzej Siewior * can do. If we don't clean in up we loop for ever. If 13170d2f4758530d1598087d1d2f3e75b4f7d17fc6c7Sebastian Andrzej Siewior * we skip the TRB than it gets overwritten reused after 13180d2f4758530d1598087d1d2f3e75b4f7d17fc6c7Sebastian Andrzej Siewior * a while since we use them in a ring buffer. a BUG() 13190d2f4758530d1598087d1d2f3e75b4f7d17fc6c7Sebastian Andrzej Siewior * would help. Lets hope that if this occures, someone 13200d2f4758530d1598087d1d2f3e75b4f7d17fc6c7Sebastian Andrzej Siewior * fixes the root cause instead of looking away :) 13210d2f4758530d1598087d1d2f3e75b4f7d17fc6c7Sebastian Andrzej Siewior */ 132272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "%s's TRB (%p) still owned by HW\n", 132372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name, req->trb); 132472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi count = trb.length; 132572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 132672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->direction) { 132772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (count) { 132872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "incomplete IN transfer %s\n", 132972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 133072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi status = -ECONNRESET; 133172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 133272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 133372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (count && (event->status & DEPEVT_STATUS_SHORT)) 133472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi s_pkt = 1; 133572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 133672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 133772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 133872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We assume here we will always receive the entire data block 133972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * which we should receive. Meaning, if we program RX to 134072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * receive 4K but we receive only 2K, we assume that's all we 134172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * should receive and we simply bounce the request back to the 134272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * gadget driver for further processing. 134372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 134472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.actual += req->request.length - count; 134572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_giveback(dep, req, status); 134672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (s_pkt) 134772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 134872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if ((event->status & DEPEVT_STATUS_LST) && trb.lst) 134972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 135072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if ((event->status & DEPEVT_STATUS_IOC) && trb.ioc) 135172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 135272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } while (1); 135372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 135472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if ((event->status & DEPEVT_STATUS_IOC) && trb.ioc) 135572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 135672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 1; 135772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 135872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 135972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_endpoint_transfer_complete(struct dwc3 *dwc, 136072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep, const struct dwc3_event_depevt *event, 136172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int start_new) 136272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 136372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned status = 0; 136472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int clean_busy; 136572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 136672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (event->status & DEPEVT_STATUS_BUSERR) 136772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi status = -ECONNRESET; 136872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 136972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi clean_busy = dwc3_cleanup_done_reqs(dwc, dep, event, status); 1370a1ae9be5fc137d7e911a77ef408273ff55a53a39Sebastian Andrzej Siewior if (clean_busy) { 137172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags &= ~DWC3_EP_BUSY; 1372a1ae9be5fc137d7e911a77ef408273ff55a53a39Sebastian Andrzej Siewior dep->res_trans_idx = 0; 1373a1ae9be5fc137d7e911a77ef408273ff55a53a39Sebastian Andrzej Siewior } 137472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 137572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 137672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_start_isoc(struct dwc3 *dwc, 137772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep, const struct dwc3_event_depevt *event) 137872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 137972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 uf; 138072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 138172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (list_empty(&dep->request_list)) { 138272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "ISOC ep %s run out for requests.\n", 138372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 138472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 138572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 138672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 138772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (event->parameters) { 138872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 mask; 138972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 139072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi mask = ~(dep->interval - 1); 139172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi uf = event->parameters & mask; 139272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 4 micro frames in the future */ 139372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi uf += dep->interval * 4; 139472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 139572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi uf = 0; 139672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 139772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 139872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi __dwc3_gadget_kick_transfer(dep, uf, 1); 139972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 140072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 140172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_process_ep_cmd_complete(struct dwc3_ep *dep, 140272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct dwc3_event_depevt *event) 140372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 140472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 140572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_event_depevt mod_ev = *event; 140672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 140772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 140872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We were asked to remove one requests. It is possible that this 140972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * request and a few other were started together and have the same 141072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * transfer index. Since we stopped the complete endpoint we don't 141172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * know how many requests were already completed (and not yet) 141272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * reported and how could be done (later). We purge them all until 141372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * the end of the list. 141472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 141572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi mod_ev.status = DEPEVT_STATUS_LST; 141672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_cleanup_done_reqs(dwc, dep, &mod_ev, -ESHUTDOWN); 141772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags &= ~DWC3_EP_BUSY; 141872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* pending requets are ignored and are queued on XferNotReady */ 141972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 142072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->flags & DWC3_EP_WILL_SHUTDOWN) { 142172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi while (!list_empty(&dep->req_queued)) { 142272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req; 142372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 142472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req = next_request(&dep->req_queued); 142572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_giveback(dep, req, -ESHUTDOWN); 142672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 14270156cf8603b86c949d02aa315684b4c677e66638Sebastian Andrzej Siewior dep->flags &= ~DWC3_EP_WILL_SHUTDOWN; 142872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 142972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 143072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 143172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_ep_cmd_compl(struct dwc3_ep *dep, 143272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct dwc3_event_depevt *event) 143372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 143472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 param = event->parameters; 143572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 cmd_type = (param >> 8) & ((1 << 5) - 1); 143672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 143772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (cmd_type) { 143872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_ENDTRANSFER: 143972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_process_ep_cmd_complete(dep, event); 144072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 144172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_STARTTRANSFER: 144272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->res_trans_idx = param & 0x7f; 144372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 144472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 144572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi printk(KERN_ERR "%s() unknown /unexpected type: %d\n", 144672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi __func__, cmd_type); 144772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 144872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi }; 144972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 145072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 145172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_endpoint_interrupt(struct dwc3 *dwc, 145272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct dwc3_event_depevt *event) 145372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 145472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 145572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 epnum = event->endpoint_number; 145672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 145772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[epnum]; 145872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 145972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s: %s\n", dep->name, 146072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_ep_event_string(event->endpoint_event)); 146172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 146272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (epnum == 0 || epnum == 1) { 146372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_ep0_interrupt(dwc, event); 146472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 146572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 146672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 146772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (event->endpoint_event) { 146872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPEVT_XFERCOMPLETE: 146972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (usb_endpoint_xfer_isoc(dep->desc)) { 147072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "%s is an Isochronous endpoint\n", 147172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 147272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 147372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 147472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 147572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_endpoint_transfer_complete(dwc, dep, event, 1); 147672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 147772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPEVT_XFERINPROGRESS: 147872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!usb_endpoint_xfer_isoc(dep->desc)) { 147972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "%s is not an Isochronous endpoint\n", 148072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 148172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 148272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 148372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 148472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_endpoint_transfer_complete(dwc, dep, event, 0); 148572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 148672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPEVT_XFERNOTREADY: 148772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (usb_endpoint_xfer_isoc(dep->desc)) { 148872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_start_isoc(dwc, dep, event); 148972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 149072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 149172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 149272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s: reason %s\n", 149372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name, event->status 149472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ? "Transfer Active" 149572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi : "Transfer Not Active"); 149672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 149772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = __dwc3_gadget_kick_transfer(dep, 0, 1); 149872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!ret || ret == -EBUSY) 149972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 150072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 150172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "%s: failed to kick transfers\n", 150272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 150372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 150472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 150572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 150672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPEVT_RXTXFIFOEVT: 150772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "%s FIFO Overrun\n", dep->name); 150872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 150972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPEVT_STREAMEVT: 151072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "%s Stream Event\n", dep->name); 151172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 151272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPEVT_EPCMDCMPLT: 151372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_ep_cmd_compl(dep, event); 151472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 151572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 151672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 151772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 151872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_disconnect_gadget(struct dwc3 *dwc) 151972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 152072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dwc->gadget_driver && dwc->gadget_driver->disconnect) { 152172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock(&dwc->lock); 152272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver->disconnect(&dwc->gadget); 152372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock(&dwc->lock); 152472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 152572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 152672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 152772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_stop_active_transfer(struct dwc3 *dwc, u32 epnum) 152872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 152972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 153072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 153172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 cmd; 153272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 153372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 153472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[epnum]; 153572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 153672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->res_trans_idx) { 153772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd = DWC3_DEPCMD_ENDTRANSFER; 153872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd |= DWC3_DEPCMD_HIPRI_FORCERM | DWC3_DEPCMD_CMDIOC; 153972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd |= DWC3_DEPCMD_PARAM(dep->res_trans_idx); 154072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0, sizeof(params)); 154172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, cmd, ¶ms); 154272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi WARN_ON_ONCE(ret); 1543a1ae9be5fc137d7e911a77ef408273ff55a53a39Sebastian Andrzej Siewior dep->res_trans_idx = 0; 154472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 154572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 154672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 154772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_stop_active_transfers(struct dwc3 *dwc) 154872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 154972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 epnum; 155072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 155172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi for (epnum = 2; epnum < DWC3_ENDPOINTS_NUM; epnum++) { 155272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 155372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 155472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[epnum]; 155572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) 155672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi continue; 155772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 155872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi __dwc3_gadget_ep_disable(dep); 155972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 156072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 156172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 156272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_clear_stall_all_ep(struct dwc3 *dwc) 156372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 156472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 epnum; 156572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 156672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi for (epnum = 1; epnum < DWC3_ENDPOINTS_NUM; epnum++) { 156772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 156872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 156972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 157072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 157172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[epnum]; 157272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 157372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(dep->flags & DWC3_EP_STALL)) 157472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi continue; 157572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 157672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags &= ~DWC3_EP_STALL; 157772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 157872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0, sizeof(params)); 157972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, 158072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEPCMD_CLEARSTALL, ¶ms); 158172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi WARN_ON_ONCE(ret); 158272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 158372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 158472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 158572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_disconnect_interrupt(struct dwc3 *dwc) 158672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 158772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s\n", __func__); 158872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#if 0 158972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi XXX 159072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi U1/U2 is powersave optimization. Skip it for now. Anyway we need to 159172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi enable it before we can disable it. 159272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 159372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 159472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DCTL_INITU1ENA; 159572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 159672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 159772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DCTL_INITU2ENA; 159872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 159972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#endif 160072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 160172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_stop_active_transfers(dwc); 160272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_disconnect_gadget(dwc); 160372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 160472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_UNKNOWN; 160572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 160672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 160772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_usb3_phy_power(struct dwc3 *dwc, int on) 160872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 160972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 161072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 161172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(0)); 161272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 161372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (on) 161472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_GUSB3PIPECTL_SUSPHY; 161572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi else 161672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg |= DWC3_GUSB3PIPECTL_SUSPHY; 161772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 161872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg); 161972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 162072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 162172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_usb2_phy_power(struct dwc3 *dwc, int on) 162272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 162372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 162472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 162572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0)); 162672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 162772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (on) 162872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_GUSB2PHYCFG_SUSPHY; 162972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi else 163072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg |= DWC3_GUSB2PHYCFG_SUSPHY; 163172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 163272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg); 163372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 163472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 163572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_reset_interrupt(struct dwc3 *dwc) 163672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 163772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 163872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 163972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s\n", __func__); 164072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 164172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* Enable PHYs */ 164272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_usb2_phy_power(dwc, true); 164372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_usb3_phy_power(dwc, true); 164472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 164572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dwc->gadget.speed != USB_SPEED_UNKNOWN) 164672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_disconnect_gadget(dwc); 164772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 164872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 164972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DCTL_TSTCTRL_MASK; 165072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 165172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 165272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_stop_active_transfers(dwc); 165372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_clear_stall_all_ep(dwc); 165472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 165572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* Reset device address to zero */ 165672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCFG); 165772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~(DWC3_DCFG_DEVADDR_MASK); 165872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCFG, reg); 165972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 166072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 166172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Wait for RxFifo to drain 166272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 166372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * REVISIT probably shouldn't wait forever. 166472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * In case Hardware ends up in a screwed up 166572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * case, we error out, notify the user and, 166672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * maybe, WARN() or BUG() but leave the rest 166772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * of the kernel working fine. 166872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 166972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * REVISIT the below is rather CPU intensive, 167072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * maybe we should read and if it doesn't work 167172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * sleep (not busy wait) for a few useconds. 167272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 167372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * REVISIT why wait until the RXFIFO is empty anyway? 167472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 167572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi while (!(dwc3_readl(dwc->regs, DWC3_DSTS) 167672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi & DWC3_DSTS_RXFIFOEMPTY)) 167772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cpu_relax(); 167872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 167972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 168072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_update_ram_clk_sel(struct dwc3 *dwc, u32 speed) 168172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 168272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 168372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 usb30_clock = DWC3_GCTL_CLK_BUS; 168472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 168572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 168672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We change the clock only at SS but I dunno why I would want to do 168772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * this. Maybe it becomes part of the power saving plan. 168872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 168972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 169072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (speed != DWC3_DSTS_SUPERSPEED) 169172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 169272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 169372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 169472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * RAMClkSel is reset to 0 after USB reset, so it must be reprogrammed 169572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * each time on Connect Done. 169672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 169772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!usb30_clock) 169872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 169972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 170072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_GCTL); 170172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg |= DWC3_GCTL_RAMCLKSEL(usb30_clock); 170272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_GCTL, reg); 170372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 170472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 170572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_disable_phy(struct dwc3 *dwc, u8 speed) 170672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 170772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (speed) { 170872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_SPEED_SUPER: 170972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_usb2_phy_power(dwc, false); 171072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 171172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_SPEED_HIGH: 171272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_SPEED_FULL: 171372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_SPEED_LOW: 171472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_usb3_phy_power(dwc, false); 171572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 171672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 171772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 171872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 171972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_conndone_interrupt(struct dwc3 *dwc) 172072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 172172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 172272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 172372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 172472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 172572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 speed; 172672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 172772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s\n", __func__); 172872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 172972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0x00, sizeof(params)); 173072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 173172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 173272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi speed = reg & DWC3_DSTS_CONNECTSPD; 173372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->speed = speed; 173472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 173572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_update_ram_clk_sel(dwc, speed); 173672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 173772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (speed) { 173872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DCFG_SUPERSPEED: 173972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(512); 174072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ep0->maxpacket = 512; 174172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_SUPER; 174272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 174372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DCFG_HIGHSPEED: 174472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(64); 174572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ep0->maxpacket = 64; 174672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_HIGH; 174772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 174872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DCFG_FULLSPEED2: 174972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DCFG_FULLSPEED1: 175072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(64); 175172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ep0->maxpacket = 64; 175272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_FULL; 175372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 175472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DCFG_LOWSPEED: 175572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(8); 175672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ep0->maxpacket = 8; 175772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_LOW; 175872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 175972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 176072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 176172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* Disable unneded PHY */ 176272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_disable_phy(dwc, dwc->gadget.speed); 176372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 176472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[0]; 176572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc); 176672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 176772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to enable %s\n", dep->name); 176872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 176972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 177072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 177172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[1]; 177272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc); 177372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 177472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to enable %s\n", dep->name); 177572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 177672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 177772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 177872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 177972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Configure PHY via GUSB3PIPECTLn if required. 178072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 178172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Update GTXFIFOSIZn 178272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 178372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * In both cases reset values should be sufficient. 178472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 178572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 178672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 178772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_wakeup_interrupt(struct dwc3 *dwc) 178872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 178972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s\n", __func__); 179072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 179172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 179272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * TODO take core out of low power mode when that's 179372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * implemented. 179472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 179572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 179672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver->resume(&dwc->gadget); 179772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 179872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 179972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_linksts_change_interrupt(struct dwc3 *dwc, 180072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned int evtinfo) 180172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 180272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s\n", __func__); 180372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 180472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* The fith bit says SuperSpeed yes or no. */ 180572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->link_state = evtinfo & DWC3_LINK_STATE_MASK; 180672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 180772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 180872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_interrupt(struct dwc3 *dwc, 180972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct dwc3_event_devt *event) 181072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 181172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (event->type) { 181272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_DISCONNECT: 181372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_disconnect_interrupt(dwc); 181472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 181572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_RESET: 181672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_reset_interrupt(dwc); 181772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 181872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_CONNECT_DONE: 181972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_conndone_interrupt(dwc); 182072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 182172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_WAKEUP: 182272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_wakeup_interrupt(dwc); 182372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 182472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_LINK_STATUS_CHANGE: 182572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_linksts_change_interrupt(dwc, event->event_info); 182672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 182772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_EOPF: 182872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "End of Periodic Frame\n"); 182972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 183072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_SOF: 183172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "Start of Periodic Frame\n"); 183272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 183372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_ERRATIC_ERROR: 183472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "Erratic Error\n"); 183572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 183672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_CMD_CMPL: 183772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "Command Complete\n"); 183872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 183972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_OVERFLOW: 184072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "Overflow\n"); 184172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 184272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 184372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "UNKNOWN IRQ %d\n", event->type); 184472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 184572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 184672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 184772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_process_event_entry(struct dwc3 *dwc, 184872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const union dwc3_event *event) 184972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 185072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* Endpoint IRQ, handle it and return early */ 185172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (event->type.is_devspec == 0) { 185272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* depevt */ 185372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return dwc3_endpoint_interrupt(dwc, &event->depevt); 185472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 185572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 185672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (event->type.type) { 185772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_EVENT_TYPE_DEV: 185872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_interrupt(dwc, &event->devt); 185972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 186072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* REVISIT what to do with Carkit and I2C events ? */ 186172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 186272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "UNKNOWN IRQ type %d\n", event->raw); 186372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 186472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 186572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 186672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic irqreturn_t dwc3_process_event_buf(struct dwc3 *dwc, u32 buf) 186772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 186872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_event_buffer *evt; 186972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int left; 187072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 count; 187172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 187272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi count = dwc3_readl(dwc->regs, DWC3_GEVNTCOUNT(buf)); 187372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi count &= DWC3_GEVNTCOUNT_MASK; 187472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!count) 187572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return IRQ_NONE; 187672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 187772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi evt = dwc->ev_buffs[buf]; 187872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi left = count; 187972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 188072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi while (left > 0) { 188172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi union dwc3_event event; 188272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 188372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memcpy(&event.raw, (evt->buf + evt->lpos), sizeof(event.raw)); 188472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_process_event_entry(dwc, &event); 188572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 188672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * XXX we wrap around correctly to the next entry as almost all 188772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * entries are 4 bytes in size. There is one entry which has 12 188872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * bytes which is a regular entry followed by 8 bytes data. ATM 188972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * I don't know how things are organized if were get next to the 189072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * a boundary so I worry about that once we try to handle that. 189172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 189272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi evt->lpos = (evt->lpos + 4) % DWC3_EVENT_BUFFERS_SIZE; 189372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi left -= 4; 189472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 189572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_GEVNTCOUNT(buf), 4); 189672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 189772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 189872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return IRQ_HANDLED; 189972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 190072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 190172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic irqreturn_t dwc3_interrupt(int irq, void *_dwc) 190272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 190372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = _dwc; 190472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int i; 190572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi irqreturn_t ret = IRQ_NONE; 190672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 190772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock(&dwc->lock); 190872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 190972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi for (i = 0; i < DWC3_EVENT_BUFFERS_NUM; i++) { 191072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi irqreturn_t status; 191172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 191272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi status = dwc3_process_event_buf(dwc, i); 191372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (status == IRQ_HANDLED) 191472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = status; 191572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 191672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 191772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock(&dwc->lock); 191872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 191972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 192072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 192172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 192272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/** 192372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * dwc3_gadget_init - Initializes gadget related registers 192472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * @dwc: Pointer to out controller context structure 192572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 192672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Returns 0 on success otherwise negative errno. 192772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 192872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiint __devinit dwc3_gadget_init(struct dwc3 *dwc) 192972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 193072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 193172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 193272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int irq; 193372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 193472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ctrl_req = dma_alloc_coherent(dwc->dev, sizeof(*dwc->ctrl_req), 193572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi &dwc->ctrl_req_addr, GFP_KERNEL); 193672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dwc->ctrl_req) { 193772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to allocate ctrl request\n"); 193872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -ENOMEM; 193972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto err0; 194072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 194172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 194272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ep0_trb = dma_alloc_coherent(dwc->dev, sizeof(*dwc->ep0_trb), 194372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi &dwc->ep0_trb_addr, GFP_KERNEL); 194472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dwc->ep0_trb) { 194572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to allocate ep0 trb\n"); 194672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -ENOMEM; 194772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto err1; 194872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 194972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 195072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->setup_buf = dma_alloc_coherent(dwc->dev, 195172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi sizeof(*dwc->setup_buf) * 2, 195272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi &dwc->setup_buf_addr, GFP_KERNEL); 195372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dwc->setup_buf) { 195472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to allocate setup buffer\n"); 195572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -ENOMEM; 195672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto err2; 195772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 195872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 19595812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi dwc->ep0_bounce = dma_alloc_coherent(dwc->dev, 19605812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi 512, &dwc->ep0_bounce_addr, GFP_KERNEL); 19615812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi if (!dwc->ep0_bounce) { 19625812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi dev_err(dwc->dev, "failed to allocate ep0 bounce buffer\n"); 19635812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi ret = -ENOMEM; 19645812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi goto err3; 19655812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi } 19665812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi 196772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_set_name(&dwc->gadget.dev, "gadget"); 196872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 196972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ops = &dwc3_gadget_ops; 197072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.is_dualspeed = true; 197172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_UNKNOWN; 197272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.dev.parent = dwc->dev; 197372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 197472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_set_coherent_mask(&dwc->gadget.dev, dwc->dev->coherent_dma_mask); 197572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 197672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.dev.dma_parms = dwc->dev->dma_parms; 197772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.dev.dma_mask = dwc->dev->dma_mask; 197872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.dev.release = dwc3_gadget_release; 197972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.name = "dwc3-gadget"; 198072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 198172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 198272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * REVISIT: Here we should clear all pending IRQs to be 198372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * sure we're starting from a well known location. 198472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 198572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 198672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_gadget_init_endpoints(dwc); 198772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 19885812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi goto err4; 198972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 199072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi irq = platform_get_irq(to_platform_device(dwc->dev), 0); 199172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 199272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = request_irq(irq, dwc3_interrupt, IRQF_SHARED, 199372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi "dwc3", dwc); 199472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 199572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to request irq #%d --> %d\n", 199672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi irq, ret); 19975812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi goto err5; 199872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 199972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 200072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* Enable all but Start and End of Frame IRQs */ 200172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = (DWC3_DEVTEN_VNDRDEVTSTRCVEDEN | 200272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEVTEN_EVNTOVERFLOWEN | 200372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEVTEN_CMDCMPLTEN | 200472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEVTEN_ERRTICERREN | 200572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEVTEN_WKUPEVTEN | 200672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEVTEN_ULSTCNGEN | 200772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEVTEN_CONNECTDONEEN | 200872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEVTEN_USBRSTEN | 200972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEVTEN_DISCONNEVTEN); 201072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEVTEN, reg); 201172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 201272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = device_register(&dwc->gadget.dev); 201372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 201472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to register gadget device\n"); 201572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi put_device(&dwc->gadget.dev); 20165812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi goto err6; 201772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 201872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 201972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = usb_add_gadget_udc(dwc->dev, &dwc->gadget); 202072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 202172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to register udc\n"); 20225812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi goto err7; 202372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 202472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 202572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 202672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 20275812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbierr7: 202872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi device_unregister(&dwc->gadget.dev); 202972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 20305812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbierr6: 203172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEVTEN, 0x00); 203272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi free_irq(irq, dwc); 203372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 20345812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbierr5: 203572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_free_endpoints(dwc); 203672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 20375812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbierr4: 20385812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi dma_free_coherent(dwc->dev, 512, dwc->ep0_bounce, 20395812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi dwc->ep0_bounce_addr); 20405812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi 204172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbierr3: 204272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(*dwc->setup_buf) * 2, 204372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->setup_buf, dwc->setup_buf_addr); 204472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 204572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbierr2: 204672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(*dwc->ep0_trb), 204772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ep0_trb, dwc->ep0_trb_addr); 204872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 204972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbierr1: 205072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(*dwc->ctrl_req), 205172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ctrl_req, dwc->ctrl_req_addr); 205272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 205372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbierr0: 205472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 205572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 205672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 205772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbivoid dwc3_gadget_exit(struct dwc3 *dwc) 205872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 205972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int irq; 206072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int i; 206172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 206272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi usb_del_gadget_udc(&dwc->gadget); 206372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi irq = platform_get_irq(to_platform_device(dwc->dev), 0); 206472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 206572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEVTEN, 0x00); 206672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi free_irq(irq, dwc); 206772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 206872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi for (i = 0; i < ARRAY_SIZE(dwc->eps); i++) 206972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi __dwc3_gadget_ep_disable(dwc->eps[i]); 207072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 207172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_free_endpoints(dwc); 207272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 20735812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi dma_free_coherent(dwc->dev, 512, dwc->ep0_bounce, 20745812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi dwc->ep0_bounce_addr); 20755812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi 207672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(*dwc->setup_buf) * 2, 207772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->setup_buf, dwc->setup_buf_addr); 207872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 207972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(*dwc->ep0_trb), 208072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ep0_trb, dwc->ep0_trb_addr); 208172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 208272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(*dwc->ctrl_req), 208372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ctrl_req, dwc->ctrl_req_addr); 208472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 208572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi device_unregister(&dwc->gadget.dev); 208672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 2087