gadget.c revision 0fc9a1be09d9f8b19bcf64ab96836cb92beb0970
172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/** 272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * gadget.c - DesignWare USB3 DRD Controller Gadget Framework Link 372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com 572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Authors: Felipe Balbi <balbi@ti.com>, 772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Sebastian Andrzej Siewior <bigeasy@linutronix.de> 872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Redistribution and use in source and binary forms, with or without 1072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * modification, are permitted provided that the following conditions 1172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * are met: 1272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 1. Redistributions of source code must retain the above copyright 1372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * notice, this list of conditions, and the following disclaimer, 1472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * without modification. 1572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 2. Redistributions in binary form must reproduce the above copyright 1672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * notice, this list of conditions and the following disclaimer in the 1772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * documentation and/or other materials provided with the distribution. 1872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 3. The names of the above-listed copyright holders may not be used 1972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * to endorse or promote products derived from this software without 2072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * specific prior written permission. 2172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 2272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * ALTERNATIVELY, this software may be distributed under the terms of the 2372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * GNU General Public License ("GPL") version 2, as published by the Free 2472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Software Foundation. 2572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 2672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS 2772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 2872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 2972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 3072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 3172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 3272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 3372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 3472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 3572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 3672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 3772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 3872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 3972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/kernel.h> 4072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/delay.h> 4172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/slab.h> 4272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/spinlock.h> 4372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/platform_device.h> 4472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/pm_runtime.h> 4572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/interrupt.h> 4672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/io.h> 4772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/list.h> 4872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/dma-mapping.h> 4972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 5072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/usb/ch9.h> 5172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/usb/gadget.h> 5272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 5372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include "core.h" 5472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include "gadget.h" 5572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include "io.h" 5672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 5772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbivoid dwc3_gadget_giveback(struct dwc3_ep *dep, struct dwc3_request *req, 5872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int status) 5972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 6072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 6172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 6272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (req->queued) { 63eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (req->request.num_mapped_sgs) 64eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dep->busy_slot += req->request.num_mapped_sgs; 65eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi else 66eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dep->busy_slot++; 67eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi 6872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 6972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Skip LINK TRB. We can't use req->trb and check for 7072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * DWC3_TRBCTL_LINK_TRB because it points the TRB we just 7172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * completed (not the LINK TRB). 7272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 7372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (((dep->busy_slot & DWC3_TRB_MASK) == DWC3_TRB_NUM - 1) && 7472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi usb_endpoint_xfer_isoc(dep->desc)) 7572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->busy_slot++; 7672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 7772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_del(&req->list); 78eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi req->trb = NULL; 7972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 8072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (req->request.status == -EINPROGRESS) 8172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.status = status; 8272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 830fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi usb_gadget_unmap_request(&dwc->gadget, &req->request, 840fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi req->direction); 8572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 8672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "request %p from %s completed %d/%d ===> %d\n", 8772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req, dep->name, req->request.actual, 8872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.length, status); 8972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 9072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock(&dwc->lock); 910fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi req->request.complete(&dep->endpoint, &req->request); 9272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock(&dwc->lock); 9372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 9472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 9572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic const char *dwc3_gadget_ep_cmd_string(u8 cmd) 9672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 9772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (cmd) { 9872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_DEPSTARTCFG: 9972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Start New Configuration"; 10072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_ENDTRANSFER: 10172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "End Transfer"; 10272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_UPDATETRANSFER: 10372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Update Transfer"; 10472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_STARTTRANSFER: 10572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Start Transfer"; 10672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_CLEARSTALL: 10772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Clear Stall"; 10872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_SETSTALL: 10972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Set Stall"; 11072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_GETSEQNUMBER: 11172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Get Data Sequence Number"; 11272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_SETTRANSFRESOURCE: 11372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Set Endpoint Transfer Resource"; 11472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_SETEPCONFIG: 11572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Set Endpoint Configuration"; 11672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 11772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "UNKNOWN command"; 11872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 11972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 12072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 12172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiint dwc3_send_gadget_ep_cmd(struct dwc3 *dwc, unsigned ep, 12272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned cmd, struct dwc3_gadget_ep_cmd_params *params) 12372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 12472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = dwc->eps[ep]; 12561d58242f634642de42d6a4098913b7254a65053Sebastian Andrzej Siewior u32 timeout = 500; 12672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 12772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 12872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s: cmd '%s' params %08x %08x %08x\n", 12972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name, 130dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi dwc3_gadget_ep_cmd_string(cmd), params->param0, 131dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params->param1, params->param2); 13272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 133dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEPCMDPAR0(ep), params->param0); 134dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEPCMDPAR1(ep), params->param1); 135dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEPCMDPAR2(ep), params->param2); 13672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 13772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEPCMD(ep), cmd | DWC3_DEPCMD_CMDACT); 13872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi do { 13972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DEPCMD(ep)); 14072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(reg & DWC3_DEPCMD_CMDACT)) { 141164f6e141ed214bda30fb219d41ec3254bd90886Felipe Balbi dev_vdbg(dwc->dev, "Command Complete --> %d\n", 142164f6e141ed214bda30fb219d41ec3254bd90886Felipe Balbi DWC3_DEPCMD_STATUS(reg)); 14372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 14472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 14572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 14672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 14772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We can't sleep here, because it is also called from 14872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * interrupt context. 14972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 15072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi timeout--; 15172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!timeout) 15272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -ETIMEDOUT; 15372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 15461d58242f634642de42d6a4098913b7254a65053Sebastian Andrzej Siewior udelay(1); 15572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } while (1); 15672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 15772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 15872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic dma_addr_t dwc3_trb_dma_offset(struct dwc3_ep *dep, 15972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_trb_hw *trb) 16072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 161c439ef87c33a1df30f528cb152151465c2529cacPaul Zimmerman u32 offset = (char *) trb - (char *) dep->trb_pool; 16272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 16372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return dep->trb_pool_dma + offset; 16472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 16572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 16672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_alloc_trb_pool(struct dwc3_ep *dep) 16772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 16872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 16972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 17072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->trb_pool) 17172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 17272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 17372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->number == 0 || dep->number == 1) 17472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 17572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 17672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->trb_pool = dma_alloc_coherent(dwc->dev, 17772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi sizeof(struct dwc3_trb) * DWC3_TRB_NUM, 17872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi &dep->trb_pool_dma, GFP_KERNEL); 17972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dep->trb_pool) { 18072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dep->dwc->dev, "failed to allocate trb pool for %s\n", 18172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 18272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -ENOMEM; 18372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 18472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 18572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 18672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 18772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 18872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_free_trb_pool(struct dwc3_ep *dep) 18972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 19072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 19172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 19272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(struct dwc3_trb) * DWC3_TRB_NUM, 19372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->trb_pool, dep->trb_pool_dma); 19472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 19572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->trb_pool = NULL; 19672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->trb_pool_dma = 0; 19772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 19872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 19972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_start_config(struct dwc3 *dwc, struct dwc3_ep *dep) 20072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 20172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 20272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 cmd; 20372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 20472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0x00, sizeof(params)); 20572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 20672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->number != 1) { 20772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd = DWC3_DEPCMD_DEPSTARTCFG; 20872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* XferRscIdx == 0 for ep0 and 2 for the remaining */ 209b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman if (dep->number > 1) { 210b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman if (dwc->start_config_issued) 211b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman return 0; 212b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman dwc->start_config_issued = true; 21372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd |= DWC3_DEPCMD_PARAM(2); 214b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman } 21572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 21672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return dwc3_send_gadget_ep_cmd(dwc, 0, cmd, ¶ms); 21772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 21872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 21972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 22072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 22172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 22272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_set_ep_config(struct dwc3 *dwc, struct dwc3_ep *dep, 223c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi const struct usb_endpoint_descriptor *desc, 224c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi const struct usb_ss_ep_comp_descriptor *comp_desc) 22572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 22672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 22772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 22872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0x00, sizeof(params)); 22972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 230dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param0 = DWC3_DEPCFG_EP_TYPE(usb_endpoint_type(desc)) 231dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi | DWC3_DEPCFG_MAX_PACKET_SIZE(usb_endpoint_maxp(desc)) 232dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi | DWC3_DEPCFG_BURST_SIZE(dep->endpoint.maxburst); 23372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 234dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param1 = DWC3_DEPCFG_XFER_COMPLETE_EN 235dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi | DWC3_DEPCFG_XFER_NOT_READY_EN; 23672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 23718b7ede5f7ee2092aedcb578d3ac30bd5d4fc23cFelipe Balbi if (usb_ss_max_streams(comp_desc) && usb_endpoint_xfer_bulk(desc)) { 238dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param1 |= DWC3_DEPCFG_STREAM_CAPABLE 239dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi | DWC3_DEPCFG_STREAM_EVENT_EN; 240879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dep->stream_capable = true; 241879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi } 242879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi 24372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (usb_endpoint_xfer_isoc(desc)) 244dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param1 |= DWC3_DEPCFG_XFER_IN_PROGRESS_EN; 24572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 24672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 24772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We are doing 1:1 mapping for endpoints, meaning 24872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Physical Endpoints 2 maps to Logical Endpoint 2 and 24972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * so on. We consider the direction bit as part of the physical 25072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * endpoint number. So USB endpoint 0x81 is 0x03. 25172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 252dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param1 |= DWC3_DEPCFG_EP_NUMBER(dep->number); 25372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 25472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 25572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We must use the lower 16 TX FIFOs even though 25672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * HW might have more 25772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 25872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->direction) 259dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param0 |= DWC3_DEPCFG_FIFO_NUMBER(dep->number >> 1); 26072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 26172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (desc->bInterval) { 262dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param1 |= DWC3_DEPCFG_BINTERVAL_M1(desc->bInterval - 1); 26372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->interval = 1 << (desc->bInterval - 1); 26472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 26572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 26672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return dwc3_send_gadget_ep_cmd(dwc, dep->number, 26772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEPCMD_SETEPCONFIG, ¶ms); 26872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 26972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 27072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_set_xfer_resource(struct dwc3 *dwc, struct dwc3_ep *dep) 27172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 27272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 27372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 27472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0x00, sizeof(params)); 27572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 276dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param0 = DWC3_DEPXFERCFG_NUM_XFER_RES(1); 27772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 27872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return dwc3_send_gadget_ep_cmd(dwc, dep->number, 27972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEPCMD_SETTRANSFRESOURCE, ¶ms); 28072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 28172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 28272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/** 28372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * __dwc3_gadget_ep_enable - Initializes a HW endpoint 28472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * @dep: endpoint to be initialized 28572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * @desc: USB Endpoint Descriptor 28672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 28772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Caller should take care of locking 28872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 28972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int __dwc3_gadget_ep_enable(struct dwc3_ep *dep, 290c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi const struct usb_endpoint_descriptor *desc, 291c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi const struct usb_ss_ep_comp_descriptor *comp_desc) 29272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 29372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 29472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 29572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret = -ENOMEM; 29672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 29772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) { 29872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_gadget_start_config(dwc, dep); 29972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 30072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 30172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 30272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 303c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi ret = dwc3_gadget_set_ep_config(dwc, dep, desc, comp_desc); 30472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 30572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 30672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 30772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) { 30872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_trb_hw *trb_st_hw; 30972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_trb_hw *trb_link_hw; 31072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_trb trb_link; 31172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 31272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_gadget_set_xfer_resource(dwc, dep); 31372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 31472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 31572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 31672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->desc = desc; 317c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi dep->comp_desc = comp_desc; 31872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->type = usb_endpoint_type(desc); 31972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags |= DWC3_EP_ENABLED; 32072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 32172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DALEPENA); 32272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg |= DWC3_DALEPENA_EP(dep->number); 32372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DALEPENA, reg); 32472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 32572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!usb_endpoint_xfer_isoc(desc)) 32672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 32772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 32872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(&trb_link, 0, sizeof(trb_link)); 32972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 33072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* Link TRB for ISOC. The HWO but is never reset */ 33172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trb_st_hw = &dep->trb_pool[0]; 33272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 33372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trb_link.bplh = dwc3_trb_dma_offset(dep, trb_st_hw); 33472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trb_link.trbctl = DWC3_TRBCTL_LINK_TRB; 33572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trb_link.hwo = true; 33672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 33772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trb_link_hw = &dep->trb_pool[DWC3_TRB_NUM - 1]; 33872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_trb_to_hw(&trb_link, trb_link_hw); 33972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 34072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 34172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 34272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 34372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 344624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewiorstatic void dwc3_stop_active_transfer(struct dwc3 *dwc, u32 epnum); 345624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewiorstatic void dwc3_remove_requests(struct dwc3 *dwc, struct dwc3_ep *dep) 34672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 34772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req; 34872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 349624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior if (!list_empty(&dep->req_queued)) 350624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior dwc3_stop_active_transfer(dwc, dep->number); 351624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior 35272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi while (!list_empty(&dep->request_list)) { 35372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req = next_request(&dep->request_list); 35472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 355624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior dwc3_gadget_giveback(dep, req, -ESHUTDOWN); 35672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 35772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 35872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 35972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/** 36072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * __dwc3_gadget_ep_disable - Disables a HW endpoint 36172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * @dep: the endpoint to disable 36272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 363624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior * This function also removes requests which are currently processed ny the 364624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior * hardware and those which are not yet scheduled. 365624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior * Caller should take care of locking. 36672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 36772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int __dwc3_gadget_ep_disable(struct dwc3_ep *dep) 36872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 36972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 37072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 37172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 372624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior dwc3_remove_requests(dwc, dep); 37372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 37472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DALEPENA); 37572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DALEPENA_EP(dep->number); 37672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DALEPENA, reg); 37772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 378879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dep->stream_capable = false; 37972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->desc = NULL; 380f9c56cdd3905c96c600456203637bd7ec8ec6383Ido Shayevitz dep->endpoint.desc = NULL; 381c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi dep->comp_desc = NULL; 38272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->type = 0; 383879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dep->flags = 0; 38472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 38572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 38672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 38772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 38872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 38972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 39072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep0_enable(struct usb_ep *ep, 39172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct usb_endpoint_descriptor *desc) 39272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 39372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EINVAL; 39472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 39572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 39672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep0_disable(struct usb_ep *ep) 39772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 39872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EINVAL; 39972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 40072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 40172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 40272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 40372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_enable(struct usb_ep *ep, 40472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct usb_endpoint_descriptor *desc) 40572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 40672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 40772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc; 40872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 40972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 41072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 41172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!ep || !desc || desc->bDescriptorType != USB_DT_ENDPOINT) { 41272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi pr_debug("dwc3: invalid parameters\n"); 41372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EINVAL; 41472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 41572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 41672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!desc->wMaxPacketSize) { 41772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi pr_debug("dwc3: missing wMaxPacketSize\n"); 41872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EINVAL; 41972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 42072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 42172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = to_dwc3_ep(ep); 42272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc = dep->dwc; 42372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 42472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (usb_endpoint_type(desc)) { 42572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_ENDPOINT_XFER_CONTROL: 42672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi strncat(dep->name, "-control", sizeof(dep->name)); 42772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 42872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_ENDPOINT_XFER_ISOC: 42972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi strncat(dep->name, "-isoc", sizeof(dep->name)); 43072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 43172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_ENDPOINT_XFER_BULK: 43272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi strncat(dep->name, "-bulk", sizeof(dep->name)); 43372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 43472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_ENDPOINT_XFER_INT: 43572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi strncat(dep->name, "-int", sizeof(dep->name)); 43672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 43772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 43872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "invalid endpoint transfer type\n"); 43972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 44072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 44172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->flags & DWC3_EP_ENABLED) { 44272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_WARN_ONCE(dwc->dev, true, "%s is already enabled\n", 44372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 44472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 44572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 44672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 44772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "Enabling %s\n", dep->name); 44872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 44972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 450c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi ret = __dwc3_gadget_ep_enable(dep, desc, ep->comp_desc); 45172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 45272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 45372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 45472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 45572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 45672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_disable(struct usb_ep *ep) 45772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 45872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 45972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc; 46072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 46172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 46272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 46372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!ep) { 46472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi pr_debug("dwc3: invalid parameters\n"); 46572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EINVAL; 46672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 46772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 46872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = to_dwc3_ep(ep); 46972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc = dep->dwc; 47072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 47172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) { 47272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_WARN_ONCE(dwc->dev, true, "%s is already disabled\n", 47372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 47472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 47572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 47672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 47772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi snprintf(dep->name, sizeof(dep->name), "ep%d%s", 47872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->number >> 1, 47972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi (dep->number & 1) ? "in" : "out"); 48072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 48172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 48272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = __dwc3_gadget_ep_disable(dep); 48372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 48472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 48572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 48672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 48772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 48872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic struct usb_request *dwc3_gadget_ep_alloc_request(struct usb_ep *ep, 48972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi gfp_t gfp_flags) 49072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 49172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req; 49272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = to_dwc3_ep(ep); 49372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 49472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 49572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req = kzalloc(sizeof(*req), gfp_flags); 49672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!req) { 49772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "not enough memory\n"); 49872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return NULL; 49972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 50072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 50172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->epnum = dep->number; 50272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->dep = dep; 50372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 50472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return &req->request; 50572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 50672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 50772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_ep_free_request(struct usb_ep *ep, 50872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct usb_request *request) 50972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 51072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req = to_dwc3_request(request); 51172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 51272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi kfree(req); 51372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 51472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 515c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi/** 516c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi * dwc3_prepare_one_trb - setup one TRB from one request 517c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi * @dep: endpoint for which this request is prepared 518c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi * @req: dwc3_request pointer 519c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi */ 52068e823e24aea5227eaf20d6435485e733109d113Felipe Balbistatic void dwc3_prepare_one_trb(struct dwc3_ep *dep, 521eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi struct dwc3_request *req, dma_addr_t dma, 522eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi unsigned length, unsigned last, unsigned chain) 523c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi{ 524eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi struct dwc3 *dwc = dep->dwc; 525c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi struct dwc3_trb_hw *trb_hw; 526c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi struct dwc3_trb trb; 527c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 528c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi unsigned int cur_slot; 529c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 530eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dev_vdbg(dwc->dev, "%s: req %p dma %08llx length %d%s%s\n", 531eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dep->name, req, (unsigned long long) dma, 532eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi length, last ? " last" : "", 533eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi chain ? " chain" : ""); 534eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi 535c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi trb_hw = &dep->trb_pool[dep->free_slot & DWC3_TRB_MASK]; 536c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi cur_slot = dep->free_slot; 537c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi dep->free_slot++; 538c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 539c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi /* Skip the LINK-TRB on ISOC */ 540c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi if (((cur_slot & DWC3_TRB_MASK) == DWC3_TRB_NUM - 1) && 541c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi usb_endpoint_xfer_isoc(dep->desc)) 54268e823e24aea5227eaf20d6435485e733109d113Felipe Balbi return; 543c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 544c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi memset(&trb, 0, sizeof(trb)); 545eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (!req->trb) { 546eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dwc3_gadget_move_request_queued(req); 547eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi req->trb = trb_hw; 548eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi req->trb_dma = dwc3_trb_dma_offset(dep, trb_hw); 549eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi } 550c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 551c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi if (usb_endpoint_xfer_isoc(dep->desc)) { 552c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi trb.isp_imi = true; 553c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi trb.csp = true; 554c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi } else { 555eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi trb.chn = chain; 556c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi trb.lst = last; 557c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi } 558c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 559c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi if (usb_endpoint_xfer_bulk(dep->desc) && dep->stream_capable) 560c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi trb.sid_sofn = req->request.stream_id; 561c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 562c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi switch (usb_endpoint_type(dep->desc)) { 563c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi case USB_ENDPOINT_XFER_CONTROL: 564c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi trb.trbctl = DWC3_TRBCTL_CONTROL_SETUP; 565c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi break; 566c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 567c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi case USB_ENDPOINT_XFER_ISOC: 568c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi trb.trbctl = DWC3_TRBCTL_ISOCHRONOUS_FIRST; 569c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 570c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi /* IOC every DWC3_TRB_NUM / 4 so we can refill */ 571c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi if (!(cur_slot % (DWC3_TRB_NUM / 4))) 572c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi trb.ioc = last; 573c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi break; 574c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 575c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi case USB_ENDPOINT_XFER_BULK: 576c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi case USB_ENDPOINT_XFER_INT: 577c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi trb.trbctl = DWC3_TRBCTL_NORMAL; 578c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi break; 579c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi default: 580c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi /* 581c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi * This is only possible with faulty memory because we 582c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi * checked it already :) 583c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi */ 584c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi BUG(); 585c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi } 586c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 587eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi trb.length = length; 588eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi trb.bplh = dma; 589c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi trb.hwo = true; 590c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 591c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi dwc3_trb_to_hw(&trb, trb_hw); 592c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi} 593c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 59472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* 59572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * dwc3_prepare_trbs - setup TRBs from requests 59672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * @dep: endpoint for which requests are being prepared 59772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * @starting: true if the endpoint is idle and no requests are queued. 59872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 59972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * The functions goes through the requests list and setups TRBs for the 60072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * transfers. The functions returns once there are not more TRBs available or 60172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * it run out of requests. 60272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 60368e823e24aea5227eaf20d6435485e733109d113Felipe Balbistatic void dwc3_prepare_trbs(struct dwc3_ep *dep, bool starting) 60472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 60568e823e24aea5227eaf20d6435485e733109d113Felipe Balbi struct dwc3_request *req, *n; 60672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 trbs_left; 607c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi unsigned int last_one = 0; 60872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 60972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi BUILD_BUG_ON_NOT_POWER_OF_2(DWC3_TRB_NUM); 61072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 61172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* the first request must not be queued */ 61272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trbs_left = (dep->busy_slot - dep->free_slot) & DWC3_TRB_MASK; 613c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 61472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 61572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * if busy & slot are equal than it is either full or empty. If we are 61672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * starting to proceed requests then we are empty. Otherwise we ar 61772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * full and don't do anything 61872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 61972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!trbs_left) { 62072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!starting) 62168e823e24aea5227eaf20d6435485e733109d113Felipe Balbi return; 62272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trbs_left = DWC3_TRB_NUM; 62372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 62472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * In case we start from scratch, we queue the ISOC requests 62572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * starting from slot 1. This is done because we use ring 62672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * buffer and have no LST bit to stop us. Instead, we place 62772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * IOC bit TRB_NUM/4. We try to avoid to having an interrupt 62872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * after the first request so we start at slot 1 and have 62972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 7 requests proceed before we hit the first IOC. 63072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Other transfer types don't use the ring buffer and are 63172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * processed from the first TRB until the last one. Since we 63272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * don't wrap around we have to start at the beginning. 63372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 63472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (usb_endpoint_xfer_isoc(dep->desc)) { 63572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->busy_slot = 1; 63672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->free_slot = 1; 63772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 63872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->busy_slot = 0; 63972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->free_slot = 0; 64072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 64172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 64272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 64372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* The last TRB is a link TRB, not used for xfer */ 64472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if ((trbs_left <= 1) && usb_endpoint_xfer_isoc(dep->desc)) 64568e823e24aea5227eaf20d6435485e733109d113Felipe Balbi return; 64672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 64772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_for_each_entry_safe(req, n, &dep->request_list, list) { 648eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi unsigned length; 649eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dma_addr_t dma; 65072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 651eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (req->request.num_mapped_sgs > 0) { 652eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi struct usb_request *request = &req->request; 653eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi struct scatterlist *sg = request->sg; 654eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi struct scatterlist *s; 655eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi int i; 65672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 657eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi for_each_sg(sg, s, request->num_mapped_sgs, i) { 658eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi unsigned chain = true; 65972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 660eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi length = sg_dma_len(s); 661eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dma = sg_dma_address(s); 66272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 663eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (i == (request->num_mapped_sgs - 1) 664eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi || sg_is_last(s)) { 665eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi last_one = true; 666eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi chain = false; 667eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi } 66872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 669eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi trbs_left--; 670eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (!trbs_left) 671eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi last_one = true; 67272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 673eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (last_one) 674eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi chain = false; 67572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 676eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dwc3_prepare_one_trb(dep, req, dma, length, 677eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi last_one, chain); 67872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 679eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (last_one) 680eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi break; 681eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi } 68272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 683eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dma = req->request.dma; 684eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi length = req->request.length; 685eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi trbs_left--; 68672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 687eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (!trbs_left) 688eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi last_one = 1; 689879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi 690eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi /* Is this the last request? */ 691eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (list_is_last(&req->list, &dep->request_list)) 692eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi last_one = 1; 69372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 694eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dwc3_prepare_one_trb(dep, req, dma, length, 695eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi last_one, false); 69672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 697eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (last_one) 698eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi break; 69972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 70072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 70172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 70272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 70372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int __dwc3_gadget_kick_transfer(struct dwc3_ep *dep, u16 cmd_param, 70472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int start_new) 70572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 70672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 70772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req; 70872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 70972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 71072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 cmd; 71172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 71272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (start_new && (dep->flags & DWC3_EP_BUSY)) { 71372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s: endpoint busy\n", dep->name); 71472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EBUSY; 71572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 71672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags &= ~DWC3_EP_PENDING_REQUEST; 71772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 71872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 71972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * If we are getting here after a short-out-packet we don't enqueue any 72072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * new requests as we try to set the IOC bit only on the last request. 72172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 72272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (start_new) { 72372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (list_empty(&dep->req_queued)) 72472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_prepare_trbs(dep, start_new); 72572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 72672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* req points to the first request which will be sent */ 72772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req = next_request(&dep->req_queued); 72872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 72968e823e24aea5227eaf20d6435485e733109d113Felipe Balbi dwc3_prepare_trbs(dep, start_new); 73068e823e24aea5227eaf20d6435485e733109d113Felipe Balbi 73172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 73272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * req points to the first request where HWO changed 73372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * from 0 to 1 73472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 73568e823e24aea5227eaf20d6435485e733109d113Felipe Balbi req = next_request(&dep->req_queued); 73672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 73772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!req) { 73872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags |= DWC3_EP_PENDING_REQUEST; 73972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 74072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 74172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 74272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0, sizeof(params)); 743dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param0 = upper_32_bits(req->trb_dma); 744dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param1 = lower_32_bits(req->trb_dma); 74572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 74672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (start_new) 74772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd = DWC3_DEPCMD_STARTTRANSFER; 74872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi else 74972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd = DWC3_DEPCMD_UPDATETRANSFER; 75072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 75172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd |= DWC3_DEPCMD_PARAM(cmd_param); 75272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, cmd, ¶ms); 75372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret < 0) { 75472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "failed to send STARTTRANSFER command\n"); 75572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 75672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 75772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * FIXME we need to iterate over the list of requests 75872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * here and stop, unmap, free and del each of the linked 75972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * requests instead of we do now. 76072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 7610fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi usb_gadget_unmap_request(&dwc->gadget, &req->request, 7620fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi req->direction); 76372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_del(&req->list); 76472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 76572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 76672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 76772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags |= DWC3_EP_BUSY; 76872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->res_trans_idx = dwc3_gadget_ep_get_transfer_index(dwc, 76972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->number); 77025b8ff68bf1d4954d4a9dcb4862c6b6a53cb09e2Felipe Balbi 77125b8ff68bf1d4954d4a9dcb4862c6b6a53cb09e2Felipe Balbi WARN_ON_ONCE(!dep->res_trans_idx); 77225b8ff68bf1d4954d4a9dcb4862c6b6a53cb09e2Felipe Balbi 77372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 77472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 77572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 77672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int __dwc3_gadget_ep_queue(struct dwc3_ep *dep, struct dwc3_request *req) 77772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 7780fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi struct dwc3 *dwc = dep->dwc; 7790fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi int ret; 7800fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi 78172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.actual = 0; 78272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.status = -EINPROGRESS; 78372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->direction = dep->direction; 78472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->epnum = dep->number; 78572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 78672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 78772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We only add to our list of requests now and 78872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * start consuming the list once we get XferNotReady 78972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * IRQ. 79072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 79172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * That way, we avoid doing anything that we don't need 79272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * to do now and defer it until the point we receive a 79372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * particular token from the Host side. 79472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 79572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * This will also avoid Host cancelling URBs due to too 79672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * many NACKs. 79772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 7980fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi ret = usb_gadget_map_request(&dwc->gadget, &req->request, 7990fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi dep->direction); 8000fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi if (ret) 8010fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi return ret; 8020fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi 80372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_add_tail(&req->list, &dep->request_list); 80472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 80572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 80672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * There is one special case: XferNotReady with 80772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * empty list of requests. We need to kick the 80872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * transfer here in that situation, otherwise 80972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * we will be NAKing forever. 81072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 81172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * If we get XferNotReady before gadget driver 81272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * has a chance to queue a request, we will ACK 81372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * the IRQ but won't be able to receive the data 81472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * until the next request is queued. The following 81572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * code is handling exactly that. 81672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 81772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->flags & DWC3_EP_PENDING_REQUEST) { 81872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 81972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int start_trans; 82072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 82172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi start_trans = 1; 82272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (usb_endpoint_xfer_isoc(dep->endpoint.desc) && 82372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags & DWC3_EP_BUSY) 82472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi start_trans = 0; 82572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 82672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = __dwc3_gadget_kick_transfer(dep, 0, start_trans); 82772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret && ret != -EBUSY) { 82872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 82972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 83072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "%s: failed to kick transfers\n", 83172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 83272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 83372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi }; 83472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 83572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 83672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 83772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 83872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_queue(struct usb_ep *ep, struct usb_request *request, 83972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi gfp_t gfp_flags) 84072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 84172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req = to_dwc3_request(request); 84272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = to_dwc3_ep(ep); 84372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 84472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 84572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 84672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 84772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 84872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 84972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dep->desc) { 85072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "trying to queue request %p to disabled %s\n", 85172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi request, ep->name); 85272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -ESHUTDOWN; 85372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 85472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 85572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "queing request %p to %s length %d\n", 85672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi request, ep->name, request->length); 85772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 85872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 85972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = __dwc3_gadget_ep_queue(dep, req); 86072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 86172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 86272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 86372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 86472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 86572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_dequeue(struct usb_ep *ep, 86672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct usb_request *request) 86772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 86872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req = to_dwc3_request(request); 86972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *r = NULL; 87072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 87172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = to_dwc3_ep(ep); 87272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 87372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 87472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 87572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret = 0; 87672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 87772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 87872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 87972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_for_each_entry(r, &dep->request_list, list) { 88072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (r == req) 88172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 88272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 88372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 88472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (r != req) { 88572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_for_each_entry(r, &dep->req_queued, list) { 88672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (r == req) 88772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 88872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 88972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (r == req) { 89072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* wait until it is processed */ 89172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_stop_active_transfer(dwc, dep->number); 89272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto out0; 89372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 89472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "request %p was not queued to %s\n", 89572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi request, ep->name); 89672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EINVAL; 89772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto out0; 89872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 89972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 90072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* giveback the request */ 90172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_giveback(dep, req, -ECONNRESET); 90272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 90372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiout0: 90472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 90572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 90672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 90772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 90872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 90972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiint __dwc3_gadget_ep_set_halt(struct dwc3_ep *dep, int value) 91072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 91172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 91272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 91372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 91472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 91572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0x00, sizeof(params)); 91672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 91772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (value) { 9180b7836a9eb32f626ffd3fe3045e8c618cb8ed965Felipe Balbi if (dep->number == 0 || dep->number == 1) { 9190b7836a9eb32f626ffd3fe3045e8c618cb8ed965Felipe Balbi /* 9200b7836a9eb32f626ffd3fe3045e8c618cb8ed965Felipe Balbi * Whenever EP0 is stalled, we will restart 9210b7836a9eb32f626ffd3fe3045e8c618cb8ed965Felipe Balbi * the state machine, thus moving back to 9220b7836a9eb32f626ffd3fe3045e8c618cb8ed965Felipe Balbi * Setup Phase 9230b7836a9eb32f626ffd3fe3045e8c618cb8ed965Felipe Balbi */ 9240b7836a9eb32f626ffd3fe3045e8c618cb8ed965Felipe Balbi dwc->ep0state = EP0_SETUP_PHASE; 9250b7836a9eb32f626ffd3fe3045e8c618cb8ed965Felipe Balbi } 92672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 92772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, 92872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEPCMD_SETSTALL, ¶ms); 92972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 93072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to %s STALL on %s\n", 93172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi value ? "set" : "clear", 93272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 93372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi else 93472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags |= DWC3_EP_STALL; 93572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 9365275455a6e6ae6b57303834b0afd267bb9657ffcPaul Zimmerman if (dep->flags & DWC3_EP_WEDGE) 9375275455a6e6ae6b57303834b0afd267bb9657ffcPaul Zimmerman return 0; 9385275455a6e6ae6b57303834b0afd267bb9657ffcPaul Zimmerman 93972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, 94072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEPCMD_CLEARSTALL, ¶ms); 94172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 94272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to %s STALL on %s\n", 94372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi value ? "set" : "clear", 94472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 94572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi else 94672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags &= ~DWC3_EP_STALL; 94772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 9485275455a6e6ae6b57303834b0afd267bb9657ffcPaul Zimmerman 94972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 95072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 95172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 95272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_set_halt(struct usb_ep *ep, int value) 95372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 95472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = to_dwc3_ep(ep); 95572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 95672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 95772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 95872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 95972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 96072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 96172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 96272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 96372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (usb_endpoint_xfer_isoc(dep->desc)) { 96472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "%s is of Isochronous type\n", dep->name); 96572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EINVAL; 96672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto out; 96772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 96872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 96972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = __dwc3_gadget_ep_set_halt(dep, value); 97072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiout: 97172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 97272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 97372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 97472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 97572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 97672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_set_wedge(struct usb_ep *ep) 97772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 97872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = to_dwc3_ep(ep); 97972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 98072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags |= DWC3_EP_WEDGE; 98172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 9825275455a6e6ae6b57303834b0afd267bb9657ffcPaul Zimmerman return dwc3_gadget_ep_set_halt(ep, 1); 98372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 98472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 98572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 98672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 98772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic struct usb_endpoint_descriptor dwc3_gadget_ep0_desc = { 98872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .bLength = USB_DT_ENDPOINT_SIZE, 98972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .bDescriptorType = USB_DT_ENDPOINT, 99072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .bmAttributes = USB_ENDPOINT_XFER_CONTROL, 99172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi}; 99272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 99372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic const struct usb_ep_ops dwc3_gadget_ep0_ops = { 99472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .enable = dwc3_gadget_ep0_enable, 99572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .disable = dwc3_gadget_ep0_disable, 99672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .alloc_request = dwc3_gadget_ep_alloc_request, 99772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .free_request = dwc3_gadget_ep_free_request, 99872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .queue = dwc3_gadget_ep0_queue, 99972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .dequeue = dwc3_gadget_ep_dequeue, 100072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .set_halt = dwc3_gadget_ep_set_halt, 100172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .set_wedge = dwc3_gadget_ep_set_wedge, 100272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi}; 100372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 100472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic const struct usb_ep_ops dwc3_gadget_ep_ops = { 100572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .enable = dwc3_gadget_ep_enable, 100672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .disable = dwc3_gadget_ep_disable, 100772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .alloc_request = dwc3_gadget_ep_alloc_request, 100872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .free_request = dwc3_gadget_ep_free_request, 100972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .queue = dwc3_gadget_ep_queue, 101072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .dequeue = dwc3_gadget_ep_dequeue, 101172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .set_halt = dwc3_gadget_ep_set_halt, 101272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .set_wedge = dwc3_gadget_ep_set_wedge, 101372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi}; 101472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 101572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 101672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 101772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_get_frame(struct usb_gadget *g) 101872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 101972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 102072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 102172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 102272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 102372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return DWC3_DSTS_SOFFN(reg); 102472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 102572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 102672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_wakeup(struct usb_gadget *g) 102772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 102872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 102972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 103072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long timeout; 103172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 103272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 103372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 103472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 103572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret = 0; 103672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 103772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 link_state; 103872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 speed; 103972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 104072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 104172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 104272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 104372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * According to the Databook Remote wakeup request should 104472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * be issued only when the device is in early suspend state. 104572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 104672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We can check that via USB Link State bits in DSTS register. 104772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 104872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 104972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 105072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi speed = reg & DWC3_DSTS_CONNECTSPD; 105172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (speed == DWC3_DSTS_SUPERSPEED) { 105272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "no wakeup on SuperSpeed\n"); 105372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EINVAL; 105472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto out; 105572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 105672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 105772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi link_state = DWC3_DSTS_USBLNKST(reg); 105872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 105972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (link_state) { 106072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_LINK_STATE_RX_DET: /* in HS, means Early Suspend */ 106172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_LINK_STATE_U3: /* in HS, means SUSPEND */ 106272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 106372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 106472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "can't wakeup from link state %d\n", 106572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi link_state); 106672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EINVAL; 106772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto out; 106872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 106972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 107072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 107172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 107272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 107372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Switch link state to Recovery. In HS/FS/LS this means 107472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * RemoteWakeup Request 107572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 107672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg |= DWC3_DCTL_ULSTCHNG_RECOVERY; 107772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 107872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 107972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* wait for at least 2000us */ 108072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi usleep_range(2000, 2500); 108172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 108272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* write zeroes to Link Change Request */ 108372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DCTL_ULSTCHNGREQ_MASK; 108472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 108572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 108672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* pool until Link State change to ON */ 108772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi timeout = jiffies + msecs_to_jiffies(100); 108872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 108972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi while (!(time_after(jiffies, timeout))) { 109072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 109172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 109272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* in HS, means ON */ 109372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (DWC3_DSTS_USBLNKST(reg) == DWC3_LINK_STATE_U0) 109472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 109572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 109672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 109772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (DWC3_DSTS_USBLNKST(reg) != DWC3_LINK_STATE_U0) { 109872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to send remote wakeup\n"); 109972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EINVAL; 110072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 110172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 110272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiout: 110372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 110472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 110572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 110672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 110772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 110872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_set_selfpowered(struct usb_gadget *g, 110972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int is_selfpowered) 111072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 111172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 111272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 111372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->is_selfpowered = !!is_selfpowered; 111472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 111572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 111672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 111772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 111872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_run_stop(struct dwc3 *dwc, int is_on) 111972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 112072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 112161d58242f634642de42d6a4098913b7254a65053Sebastian Andrzej Siewior u32 timeout = 500; 112272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 112372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 112472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (is_on) 112572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg |= DWC3_DCTL_RUN_STOP; 112672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi else 112772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DCTL_RUN_STOP; 112872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 112972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 113072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 113172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi do { 113272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 113372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (is_on) { 113472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(reg & DWC3_DSTS_DEVCTRLHLT)) 113572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 113672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 113772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (reg & DWC3_DSTS_DEVCTRLHLT) 113872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 113972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 114072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi timeout--; 114172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!timeout) 114272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 114361d58242f634642de42d6a4098913b7254a65053Sebastian Andrzej Siewior udelay(1); 114472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } while (1); 114572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 114672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "gadget %s data soft-%s\n", 114772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver 114872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ? dwc->gadget_driver->function : "no-function", 114972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi is_on ? "connect" : "disconnect"); 115072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 115172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 115272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_pullup(struct usb_gadget *g, int is_on) 115372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 115472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 115572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 115672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 115772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi is_on = !!is_on; 115872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 115972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 116072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_run_stop(dwc, is_on); 116172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 116272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 116372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 116472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 116572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 116672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_start(struct usb_gadget *g, 116772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct usb_gadget_driver *driver) 116872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 116972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 117072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 117172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 117272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret = 0; 117372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 117472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 117572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 117672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 117772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dwc->gadget_driver) { 117872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "%s is already bound to %s\n", 117972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.name, 118072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver->driver.name); 118172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EBUSY; 118272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto err0; 118372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 118472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 118572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver = driver; 118672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.dev.driver = &driver->driver; 118772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 118872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCFG); 118972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~(DWC3_DCFG_SPEED_MASK); 11906c167fc9b0c23ead791edb94cf4debb6b8e534b5Felipe Balbi reg |= dwc->maximum_speed; 119172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCFG, reg); 119272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1193b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman dwc->start_config_issued = false; 1194b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman 119572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* Start with SuperSpeed Default */ 119672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(512); 119772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 119872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[0]; 1199c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL); 120072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 120172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to enable %s\n", dep->name); 120272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto err0; 120372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 120472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 120572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[1]; 1206c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL); 120772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 120872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to enable %s\n", dep->name); 120972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto err1; 121072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 121172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 121272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* begin to receive SETUP packets */ 1213c7fcdeb2627c46b7ec3f0bcb2054b10405f9a70eFelipe Balbi dwc->ep0state = EP0_SETUP_PHASE; 121472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_ep0_out_start(dwc); 121572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 121672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 121772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 121872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 121972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 122072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbierr1: 122172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi __dwc3_gadget_ep_disable(dwc->eps[0]); 122272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 122372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbierr0: 122472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 122572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 122672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 122772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 122872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 122972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_stop(struct usb_gadget *g, 123072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct usb_gadget_driver *driver) 123172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 123272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 123372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 123472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 123572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 123672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 123772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi __dwc3_gadget_ep_disable(dwc->eps[0]); 123872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi __dwc3_gadget_ep_disable(dwc->eps[1]); 123972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 124072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver = NULL; 124172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.dev.driver = NULL; 124272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 124372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 124472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 124572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 124672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 124772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic const struct usb_gadget_ops dwc3_gadget_ops = { 124872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .get_frame = dwc3_gadget_get_frame, 124972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .wakeup = dwc3_gadget_wakeup, 125072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .set_selfpowered = dwc3_gadget_set_selfpowered, 125172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .pullup = dwc3_gadget_pullup, 125272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .udc_start = dwc3_gadget_start, 125372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .udc_stop = dwc3_gadget_stop, 125472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi}; 125572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 125672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 125772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 125872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int __devinit dwc3_gadget_init_endpoints(struct dwc3 *dwc) 125972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 126072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 126172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 epnum; 126272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 126372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi INIT_LIST_HEAD(&dwc->gadget.ep_list); 126472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 126572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi for (epnum = 0; epnum < DWC3_ENDPOINTS_NUM; epnum++) { 126672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = kzalloc(sizeof(*dep), GFP_KERNEL); 126772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dep) { 126872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "can't allocate endpoint %d\n", 126972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi epnum); 127072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -ENOMEM; 127172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 127272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 127372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->dwc = dwc; 127472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->number = epnum; 127572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->eps[epnum] = dep; 127672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 127772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi snprintf(dep->name, sizeof(dep->name), "ep%d%s", epnum >> 1, 127872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi (epnum & 1) ? "in" : "out"); 127972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->endpoint.name = dep->name; 128072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->direction = (epnum & 1); 128172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 128272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (epnum == 0 || epnum == 1) { 128372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->endpoint.maxpacket = 512; 128472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->endpoint.ops = &dwc3_gadget_ep0_ops; 128572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!epnum) 128672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ep0 = &dep->endpoint; 128772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 128872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 128972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 129072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->endpoint.maxpacket = 1024; 129112d36c16bde3ee0643d705caa87723de536dbe49Sebastian Andrzej Siewior dep->endpoint.max_streams = 15; 129272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->endpoint.ops = &dwc3_gadget_ep_ops; 129372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_add_tail(&dep->endpoint.ep_list, 129472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi &dwc->gadget.ep_list); 129572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 129672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_alloc_trb_pool(dep); 129725b8ff68bf1d4954d4a9dcb4862c6b6a53cb09e2Felipe Balbi if (ret) 129872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 129972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 130025b8ff68bf1d4954d4a9dcb4862c6b6a53cb09e2Felipe Balbi 130172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi INIT_LIST_HEAD(&dep->request_list); 130272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi INIT_LIST_HEAD(&dep->req_queued); 130372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 130472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 130572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 130672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 130772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 130872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_free_endpoints(struct dwc3 *dwc) 130972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 131072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 131172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 epnum; 131272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 131372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi for (epnum = 0; epnum < DWC3_ENDPOINTS_NUM; epnum++) { 131472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[epnum]; 131572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_free_trb_pool(dep); 131672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 131772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (epnum != 0 && epnum != 1) 131872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_del(&dep->endpoint.ep_list); 131972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 132072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi kfree(dep); 132172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 132272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 132372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 132472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_release(struct device *dev) 132572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 132672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dev, "%s\n", __func__); 132772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 132872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 132972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 133072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_cleanup_done_reqs(struct dwc3 *dwc, struct dwc3_ep *dep, 133172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct dwc3_event_depevt *event, int status) 133272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 133372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req; 133472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_trb trb; 133572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned int count; 133672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned int s_pkt = 0; 133772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 133872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi do { 133972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req = next_request(&dep->req_queued); 1340d39ee7be2aaf0a53d7b5f43c13571bac95f7cc0cSebastian Andrzej Siewior if (!req) { 1341d39ee7be2aaf0a53d7b5f43c13571bac95f7cc0cSebastian Andrzej Siewior WARN_ON_ONCE(1); 1342d39ee7be2aaf0a53d7b5f43c13571bac95f7cc0cSebastian Andrzej Siewior return 1; 1343d39ee7be2aaf0a53d7b5f43c13571bac95f7cc0cSebastian Andrzej Siewior } 134472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 134572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_trb_to_nat(req->trb, &trb); 134672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 13470d2f4758530d1598087d1d2f3e75b4f7d17fc6c7Sebastian Andrzej Siewior if (trb.hwo && status != -ESHUTDOWN) 13480d2f4758530d1598087d1d2f3e75b4f7d17fc6c7Sebastian Andrzej Siewior /* 13490d2f4758530d1598087d1d2f3e75b4f7d17fc6c7Sebastian Andrzej Siewior * We continue despite the error. There is not much we 13500d2f4758530d1598087d1d2f3e75b4f7d17fc6c7Sebastian Andrzej Siewior * can do. If we don't clean in up we loop for ever. If 13510d2f4758530d1598087d1d2f3e75b4f7d17fc6c7Sebastian Andrzej Siewior * we skip the TRB than it gets overwritten reused after 13520d2f4758530d1598087d1d2f3e75b4f7d17fc6c7Sebastian Andrzej Siewior * a while since we use them in a ring buffer. a BUG() 13530d2f4758530d1598087d1d2f3e75b4f7d17fc6c7Sebastian Andrzej Siewior * would help. Lets hope that if this occures, someone 13540d2f4758530d1598087d1d2f3e75b4f7d17fc6c7Sebastian Andrzej Siewior * fixes the root cause instead of looking away :) 13550d2f4758530d1598087d1d2f3e75b4f7d17fc6c7Sebastian Andrzej Siewior */ 135672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "%s's TRB (%p) still owned by HW\n", 135772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name, req->trb); 135872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi count = trb.length; 135972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 136072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->direction) { 136172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (count) { 136272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "incomplete IN transfer %s\n", 136372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 136472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi status = -ECONNRESET; 136572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 136672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 136772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (count && (event->status & DEPEVT_STATUS_SHORT)) 136872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi s_pkt = 1; 136972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 137072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 137172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 137272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We assume here we will always receive the entire data block 137372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * which we should receive. Meaning, if we program RX to 137472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * receive 4K but we receive only 2K, we assume that's all we 137572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * should receive and we simply bounce the request back to the 137672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * gadget driver for further processing. 137772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 137872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.actual += req->request.length - count; 137972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_giveback(dep, req, status); 138072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (s_pkt) 138172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 138272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if ((event->status & DEPEVT_STATUS_LST) && trb.lst) 138372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 138472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if ((event->status & DEPEVT_STATUS_IOC) && trb.ioc) 138572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 138672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } while (1); 138772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 138872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if ((event->status & DEPEVT_STATUS_IOC) && trb.ioc) 138972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 139072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 1; 139172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 139272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 139372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_endpoint_transfer_complete(struct dwc3 *dwc, 139472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep, const struct dwc3_event_depevt *event, 139572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int start_new) 139672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 139772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned status = 0; 139872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int clean_busy; 139972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 140072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (event->status & DEPEVT_STATUS_BUSERR) 140172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi status = -ECONNRESET; 140272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 140372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi clean_busy = dwc3_cleanup_done_reqs(dwc, dep, event, status); 1404a1ae9be5fc137d7e911a77ef408273ff55a53a39Sebastian Andrzej Siewior if (clean_busy) { 140572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags &= ~DWC3_EP_BUSY; 1406a1ae9be5fc137d7e911a77ef408273ff55a53a39Sebastian Andrzej Siewior dep->res_trans_idx = 0; 1407a1ae9be5fc137d7e911a77ef408273ff55a53a39Sebastian Andrzej Siewior } 1408fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1409fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi /* 1410fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * WORKAROUND: This is the 2nd half of U1/U2 -> U0 workaround. 1411fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * See dwc3_gadget_linksts_change_interrupt() for 1st half. 1412fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi */ 1413fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi if (dwc->revision < DWC3_REVISION_183A) { 1414fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi u32 reg; 1415fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi int i; 1416fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1417fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi for (i = 0; i < DWC3_ENDPOINTS_NUM; i++) { 1418fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi struct dwc3_ep *dep = dwc->eps[i]; 1419fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1420fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) 1421fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi continue; 1422fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1423fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi if (!list_empty(&dep->req_queued)) 1424fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi return; 1425fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi } 1426fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1427fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 1428fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi reg |= dwc->u1u2; 1429fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 1430fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1431fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi dwc->u1u2 = 0; 1432fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi } 143372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 143472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 143572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_start_isoc(struct dwc3 *dwc, 143672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep, const struct dwc3_event_depevt *event) 143772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 143872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 uf; 143972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 144072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (list_empty(&dep->request_list)) { 144172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "ISOC ep %s run out for requests.\n", 144272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 144372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 144472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 144572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 144672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (event->parameters) { 144772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 mask; 144872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 144972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi mask = ~(dep->interval - 1); 145072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi uf = event->parameters & mask; 145172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 4 micro frames in the future */ 145272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi uf += dep->interval * 4; 145372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 145472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi uf = 0; 145572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 145672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 145772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi __dwc3_gadget_kick_transfer(dep, uf, 1); 145872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 145972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 146072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_process_ep_cmd_complete(struct dwc3_ep *dep, 146172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct dwc3_event_depevt *event) 146272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 146372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 146472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_event_depevt mod_ev = *event; 146572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 146672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 146772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We were asked to remove one requests. It is possible that this 146872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * request and a few other were started together and have the same 146972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * transfer index. Since we stopped the complete endpoint we don't 147072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * know how many requests were already completed (and not yet) 147172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * reported and how could be done (later). We purge them all until 147272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * the end of the list. 147372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 147472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi mod_ev.status = DEPEVT_STATUS_LST; 147572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_cleanup_done_reqs(dwc, dep, &mod_ev, -ESHUTDOWN); 147672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags &= ~DWC3_EP_BUSY; 147772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* pending requets are ignored and are queued on XferNotReady */ 147872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 147972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 148072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_ep_cmd_compl(struct dwc3_ep *dep, 148172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct dwc3_event_depevt *event) 148272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 148372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 param = event->parameters; 148472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 cmd_type = (param >> 8) & ((1 << 5) - 1); 148572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 148672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (cmd_type) { 148772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_ENDTRANSFER: 148872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_process_ep_cmd_complete(dep, event); 148972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 149072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_STARTTRANSFER: 149172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->res_trans_idx = param & 0x7f; 149272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 149372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 149472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi printk(KERN_ERR "%s() unknown /unexpected type: %d\n", 149572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi __func__, cmd_type); 149672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 149772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi }; 149872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 149972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 150072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_endpoint_interrupt(struct dwc3 *dwc, 150172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct dwc3_event_depevt *event) 150272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 150372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 150472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 epnum = event->endpoint_number; 150572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 150672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[epnum]; 150772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 150872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s: %s\n", dep->name, 150972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_ep_event_string(event->endpoint_event)); 151072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 151172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (epnum == 0 || epnum == 1) { 151272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_ep0_interrupt(dwc, event); 151372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 151472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 151572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 151672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (event->endpoint_event) { 151772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPEVT_XFERCOMPLETE: 151872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (usb_endpoint_xfer_isoc(dep->desc)) { 151972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "%s is an Isochronous endpoint\n", 152072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 152172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 152272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 152372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 152472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_endpoint_transfer_complete(dwc, dep, event, 1); 152572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 152672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPEVT_XFERINPROGRESS: 152772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!usb_endpoint_xfer_isoc(dep->desc)) { 152872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "%s is not an Isochronous endpoint\n", 152972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 153072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 153172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 153272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 153372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_endpoint_transfer_complete(dwc, dep, event, 0); 153472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 153572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPEVT_XFERNOTREADY: 153672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (usb_endpoint_xfer_isoc(dep->desc)) { 153772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_start_isoc(dwc, dep, event); 153872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 153972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 154072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 154172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s: reason %s\n", 154272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name, event->status 154372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ? "Transfer Active" 154472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi : "Transfer Not Active"); 154572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 154672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = __dwc3_gadget_kick_transfer(dep, 0, 1); 154772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!ret || ret == -EBUSY) 154872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 154972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 155072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "%s: failed to kick transfers\n", 155172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 155272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 155372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 155472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 1555879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi case DWC3_DEPEVT_STREAMEVT: 1556879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi if (!usb_endpoint_xfer_bulk(dep->desc)) { 1557879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dev_err(dwc->dev, "Stream event for non-Bulk %s\n", 1558879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dep->name); 1559879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi return; 1560879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi } 1561879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi 1562879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi switch (event->status) { 1563879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi case DEPEVT_STREAMEVT_FOUND: 1564879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dev_vdbg(dwc->dev, "Stream %d found and started\n", 1565879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi event->parameters); 1566879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi 1567879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi break; 1568879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi case DEPEVT_STREAMEVT_NOTFOUND: 1569879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi /* FALLTHROUGH */ 1570879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi default: 1571879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dev_dbg(dwc->dev, "Couldn't find suitable stream\n"); 1572879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi } 1573879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi break; 157472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPEVT_RXTXFIFOEVT: 157572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "%s FIFO Overrun\n", dep->name); 157672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 157772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPEVT_EPCMDCMPLT: 157872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_ep_cmd_compl(dep, event); 157972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 158072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 158172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 158272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 158372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_disconnect_gadget(struct dwc3 *dwc) 158472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 158572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dwc->gadget_driver && dwc->gadget_driver->disconnect) { 158672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock(&dwc->lock); 158772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver->disconnect(&dwc->gadget); 158872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock(&dwc->lock); 158972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 159072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 159172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 159272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_stop_active_transfer(struct dwc3 *dwc, u32 epnum) 159372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 159472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 159572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 159672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 cmd; 159772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 159872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 159972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[epnum]; 160072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1601624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior WARN_ON(!dep->res_trans_idx); 160272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->res_trans_idx) { 160372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd = DWC3_DEPCMD_ENDTRANSFER; 160472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd |= DWC3_DEPCMD_HIPRI_FORCERM | DWC3_DEPCMD_CMDIOC; 160572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd |= DWC3_DEPCMD_PARAM(dep->res_trans_idx); 160672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0, sizeof(params)); 160772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, cmd, ¶ms); 160872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi WARN_ON_ONCE(ret); 1609a1ae9be5fc137d7e911a77ef408273ff55a53a39Sebastian Andrzej Siewior dep->res_trans_idx = 0; 161072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 161172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 161272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 161372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_stop_active_transfers(struct dwc3 *dwc) 161472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 161572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 epnum; 161672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 161772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi for (epnum = 2; epnum < DWC3_ENDPOINTS_NUM; epnum++) { 161872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 161972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 162072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[epnum]; 162172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) 162272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi continue; 162372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1624624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior dwc3_remove_requests(dwc, dep); 162572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 162672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 162772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 162872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_clear_stall_all_ep(struct dwc3 *dwc) 162972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 163072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 epnum; 163172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 163272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi for (epnum = 1; epnum < DWC3_ENDPOINTS_NUM; epnum++) { 163372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 163472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 163572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 163672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 163772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[epnum]; 163872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 163972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(dep->flags & DWC3_EP_STALL)) 164072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi continue; 164172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 164272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags &= ~DWC3_EP_STALL; 164372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 164472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0, sizeof(params)); 164572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, 164672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEPCMD_CLEARSTALL, ¶ms); 164772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi WARN_ON_ONCE(ret); 164872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 164972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 165072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 165172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_disconnect_interrupt(struct dwc3 *dwc) 165272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 165372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s\n", __func__); 165472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#if 0 165572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi XXX 165672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi U1/U2 is powersave optimization. Skip it for now. Anyway we need to 165772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi enable it before we can disable it. 165872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 165972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 166072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DCTL_INITU1ENA; 166172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 166272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 166372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DCTL_INITU2ENA; 166472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 166572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#endif 166672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 166772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_stop_active_transfers(dwc); 166872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_disconnect_gadget(dwc); 1669b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman dwc->start_config_issued = false; 167072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 167172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_UNKNOWN; 1672df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi dwc->setup_packet_pending = false; 167372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 167472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 167572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_usb3_phy_power(struct dwc3 *dwc, int on) 167672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 167772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 167872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 167972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(0)); 168072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 168172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (on) 168272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_GUSB3PIPECTL_SUSPHY; 168372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi else 168472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg |= DWC3_GUSB3PIPECTL_SUSPHY; 168572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 168672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg); 168772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 168872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 168972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_usb2_phy_power(struct dwc3 *dwc, int on) 169072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 169172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 169272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 169372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0)); 169472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 169572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (on) 169672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_GUSB2PHYCFG_SUSPHY; 169772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi else 169872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg |= DWC3_GUSB2PHYCFG_SUSPHY; 169972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 170072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg); 170172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 170272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 170372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_reset_interrupt(struct dwc3 *dwc) 170472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 170572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 170672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 170772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s\n", __func__); 170872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1709df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi /* 1710df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * WORKAROUND: DWC3 revisions <1.88a have an issue which 1711df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * would cause a missing Disconnect Event if there's a 1712df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * pending Setup Packet in the FIFO. 1713df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * 1714df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * There's no suggested workaround on the official Bug 1715df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * report, which states that "unless the driver/application 1716df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * is doing any special handling of a disconnect event, 1717df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * there is no functional issue". 1718df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * 1719df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * Unfortunately, it turns out that we _do_ some special 1720df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * handling of a disconnect event, namely complete all 1721df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * pending transfers, notify gadget driver of the 1722df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * disconnection, and so on. 1723df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * 1724df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * Our suggested workaround is to follow the Disconnect 1725df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * Event steps here, instead, based on a setup_packet_pending 1726df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * flag. Such flag gets set whenever we have a XferNotReady 1727df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * event on EP0 and gets cleared on XferComplete for the 1728df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * same endpoint. 1729df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * 1730df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * Refers to: 1731df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * 1732df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * STAR#9000466709: RTL: Device : Disconnect event not 1733df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi * generated if setup packet pending in FIFO 1734df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi */ 1735df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi if (dwc->revision < DWC3_REVISION_188A) { 1736df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi if (dwc->setup_packet_pending) 1737df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi dwc3_gadget_disconnect_interrupt(dwc); 1738df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi } 1739df62df56e13d73cb0dd4c54649d4fe13557128f8Felipe Balbi 1740961906edb549c95f4cc33e4f3dbfd0fcc364954dFelipe Balbi /* after reset -> Default State */ 1741961906edb549c95f4cc33e4f3dbfd0fcc364954dFelipe Balbi dwc->dev_state = DWC3_DEFAULT_STATE; 1742961906edb549c95f4cc33e4f3dbfd0fcc364954dFelipe Balbi 174372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* Enable PHYs */ 174472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_usb2_phy_power(dwc, true); 174572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_usb3_phy_power(dwc, true); 174672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 174772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dwc->gadget.speed != USB_SPEED_UNKNOWN) 174872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_disconnect_gadget(dwc); 174972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 175072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 175172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DCTL_TSTCTRL_MASK; 175272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 175372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 175472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_stop_active_transfers(dwc); 175572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_clear_stall_all_ep(dwc); 1756b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman dwc->start_config_issued = false; 175772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 175872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* Reset device address to zero */ 175972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCFG); 176072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~(DWC3_DCFG_DEVADDR_MASK); 176172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCFG, reg); 176272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 176372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 176472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_update_ram_clk_sel(struct dwc3 *dwc, u32 speed) 176572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 176672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 176772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 usb30_clock = DWC3_GCTL_CLK_BUS; 176872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 176972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 177072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We change the clock only at SS but I dunno why I would want to do 177172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * this. Maybe it becomes part of the power saving plan. 177272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 177372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 177472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (speed != DWC3_DSTS_SUPERSPEED) 177572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 177672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 177772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 177872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * RAMClkSel is reset to 0 after USB reset, so it must be reprogrammed 177972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * each time on Connect Done. 178072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 178172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!usb30_clock) 178272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 178372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 178472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_GCTL); 178572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg |= DWC3_GCTL_RAMCLKSEL(usb30_clock); 178672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_GCTL, reg); 178772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 178872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 178972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_disable_phy(struct dwc3 *dwc, u8 speed) 179072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 179172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (speed) { 179272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_SPEED_SUPER: 179372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_usb2_phy_power(dwc, false); 179472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 179572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_SPEED_HIGH: 179672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_SPEED_FULL: 179772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_SPEED_LOW: 179872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_usb3_phy_power(dwc, false); 179972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 180072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 180172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 180272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 180372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_conndone_interrupt(struct dwc3 *dwc) 180472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 180572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 180672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 180772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 180872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 180972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 speed; 181072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 181172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s\n", __func__); 181272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 181372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0x00, sizeof(params)); 181472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 181572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 181672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi speed = reg & DWC3_DSTS_CONNECTSPD; 181772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->speed = speed; 181872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 181972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_update_ram_clk_sel(dwc, speed); 182072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 182172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (speed) { 182272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DCFG_SUPERSPEED: 182305870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi /* 182405870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * WORKAROUND: DWC3 revisions <1.90a have an issue which 182505870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * would cause a missing USB3 Reset event. 182605870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * 182705870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * In such situations, we should force a USB3 Reset 182805870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * event by calling our dwc3_gadget_reset_interrupt() 182905870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * routine. 183005870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * 183105870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * Refers to: 183205870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * 183305870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * STAR#9000483510: RTL: SS : USB3 reset event may 183405870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi * not be generated always when the link enters poll 183505870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi */ 183605870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi if (dwc->revision < DWC3_REVISION_190A) 183705870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi dwc3_gadget_reset_interrupt(dwc); 183805870c5ba2002c7d49adf8875cca49ee062af894Felipe Balbi 183972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(512); 184072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ep0->maxpacket = 512; 184172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_SUPER; 184272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 184372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DCFG_HIGHSPEED: 184472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(64); 184572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ep0->maxpacket = 64; 184672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_HIGH; 184772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 184872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DCFG_FULLSPEED2: 184972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DCFG_FULLSPEED1: 185072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(64); 185172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ep0->maxpacket = 64; 185272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_FULL; 185372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 185472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DCFG_LOWSPEED: 185572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(8); 185672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ep0->maxpacket = 8; 185772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_LOW; 185872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 185972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 186072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 186172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* Disable unneded PHY */ 186272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_disable_phy(dwc, dwc->gadget.speed); 186372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 186472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[0]; 1865c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL); 186672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 186772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to enable %s\n", dep->name); 186872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 186972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 187072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 187172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[1]; 1872c90bfaece97c18d1ad66b9d4c717b1cb55a647adFelipe Balbi ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL); 187372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 187472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to enable %s\n", dep->name); 187572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 187672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 187772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 187872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 187972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Configure PHY via GUSB3PIPECTLn if required. 188072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 188172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Update GTXFIFOSIZn 188272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 188372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * In both cases reset values should be sufficient. 188472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 188572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 188672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 188772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_wakeup_interrupt(struct dwc3 *dwc) 188872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 188972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s\n", __func__); 189072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 189172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 189272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * TODO take core out of low power mode when that's 189372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * implemented. 189472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 189572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 189672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver->resume(&dwc->gadget); 189772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 189872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 189972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_linksts_change_interrupt(struct dwc3 *dwc, 190072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned int evtinfo) 190172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 1902fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi enum dwc3_link_state next = evtinfo & DWC3_LINK_STATE_MASK; 1903fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1904fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi /* 1905fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * WORKAROUND: DWC3 Revisions <1.83a have an issue which, depending 1906fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * on the link partner, the USB session might do multiple entry/exit 1907fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * of low power states before a transfer takes place. 1908fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * 1909fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * Due to this problem, we might experience lower throughput. The 1910fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * suggested workaround is to disable DCTL[12:9] bits if we're 1911fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * transitioning from U1/U2 to U0 and enable those bits again 1912fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * after a transfer completes and there are no pending transfers 1913fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * on any of the enabled endpoints. 1914fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * 1915fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * This is the first half of that workaround. 1916fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * 1917fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * Refers to: 1918fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * 1919fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * STAR#9000446952: RTL: Device SS : if U1/U2 ->U0 takes >128us 1920fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * core send LGO_Ux entering U0 1921fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi */ 1922fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi if (dwc->revision < DWC3_REVISION_183A) { 1923fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi if (next == DWC3_LINK_STATE_U0) { 1924fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi u32 u1u2; 1925fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi u32 reg; 1926fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1927fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi switch (dwc->link_state) { 1928fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi case DWC3_LINK_STATE_U1: 1929fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi case DWC3_LINK_STATE_U2: 1930fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 1931fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi u1u2 = reg & (DWC3_DCTL_INITU2ENA 1932fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi | DWC3_DCTL_ACCEPTU2ENA 1933fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi | DWC3_DCTL_INITU1ENA 1934fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi | DWC3_DCTL_ACCEPTU1ENA); 1935fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1936fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi if (!dwc->u1u2) 1937fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi dwc->u1u2 = reg & u1u2; 1938fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1939fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi reg &= ~u1u2; 1940fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1941fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 1942fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi break; 1943fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi default: 1944fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi /* do nothing */ 1945fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi break; 1946fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi } 1947fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi } 1948fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi } 1949fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1950fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi dwc->link_state = next; 1951019ac83252dc2b356cb0ca81c25a077ec90309e7Felipe Balbi 1952019ac83252dc2b356cb0ca81c25a077ec90309e7Felipe Balbi dev_vdbg(dwc->dev, "%s link %d\n", __func__, dwc->link_state); 195372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 195472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 195572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_interrupt(struct dwc3 *dwc, 195672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct dwc3_event_devt *event) 195772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 195872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (event->type) { 195972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_DISCONNECT: 196072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_disconnect_interrupt(dwc); 196172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 196272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_RESET: 196372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_reset_interrupt(dwc); 196472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 196572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_CONNECT_DONE: 196672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_conndone_interrupt(dwc); 196772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 196872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_WAKEUP: 196972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_wakeup_interrupt(dwc); 197072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 197172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_LINK_STATUS_CHANGE: 197272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_linksts_change_interrupt(dwc, event->event_info); 197372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 197472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_EOPF: 197572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "End of Periodic Frame\n"); 197672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 197772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_SOF: 197872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "Start of Periodic Frame\n"); 197972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 198072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_ERRATIC_ERROR: 198172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "Erratic Error\n"); 198272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 198372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_CMD_CMPL: 198472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "Command Complete\n"); 198572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 198672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_OVERFLOW: 198772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "Overflow\n"); 198872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 198972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 199072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "UNKNOWN IRQ %d\n", event->type); 199172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 199272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 199372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 199472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_process_event_entry(struct dwc3 *dwc, 199572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const union dwc3_event *event) 199672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 199772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* Endpoint IRQ, handle it and return early */ 199872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (event->type.is_devspec == 0) { 199972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* depevt */ 200072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return dwc3_endpoint_interrupt(dwc, &event->depevt); 200172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 200272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 200372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (event->type.type) { 200472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_EVENT_TYPE_DEV: 200572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_interrupt(dwc, &event->devt); 200672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 200772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* REVISIT what to do with Carkit and I2C events ? */ 200872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 200972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "UNKNOWN IRQ type %d\n", event->raw); 201072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 201172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 201272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 201372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic irqreturn_t dwc3_process_event_buf(struct dwc3 *dwc, u32 buf) 201472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 201572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_event_buffer *evt; 201672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int left; 201772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 count; 201872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 201972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi count = dwc3_readl(dwc->regs, DWC3_GEVNTCOUNT(buf)); 202072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi count &= DWC3_GEVNTCOUNT_MASK; 202172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!count) 202272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return IRQ_NONE; 202372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 202472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi evt = dwc->ev_buffs[buf]; 202572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi left = count; 202672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 202772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi while (left > 0) { 202872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi union dwc3_event event; 202972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 203072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memcpy(&event.raw, (evt->buf + evt->lpos), sizeof(event.raw)); 203172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_process_event_entry(dwc, &event); 203272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 203372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * XXX we wrap around correctly to the next entry as almost all 203472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * entries are 4 bytes in size. There is one entry which has 12 203572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * bytes which is a regular entry followed by 8 bytes data. ATM 203672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * I don't know how things are organized if were get next to the 203772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * a boundary so I worry about that once we try to handle that. 203872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 203972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi evt->lpos = (evt->lpos + 4) % DWC3_EVENT_BUFFERS_SIZE; 204072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi left -= 4; 204172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 204272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_GEVNTCOUNT(buf), 4); 204372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 204472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 204572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return IRQ_HANDLED; 204672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 204772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 204872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic irqreturn_t dwc3_interrupt(int irq, void *_dwc) 204972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 205072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = _dwc; 205172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int i; 205272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi irqreturn_t ret = IRQ_NONE; 205372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 205472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock(&dwc->lock); 205572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 20569f622b2a407d8b34a5a7f5b4abd8b29b25cf4f32Felipe Balbi for (i = 0; i < dwc->num_event_buffers; i++) { 205772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi irqreturn_t status; 205872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 205972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi status = dwc3_process_event_buf(dwc, i); 206072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (status == IRQ_HANDLED) 206172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = status; 206272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 206372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 206472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock(&dwc->lock); 206572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 206672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 206772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 206872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 206972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/** 207072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * dwc3_gadget_init - Initializes gadget related registers 207172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * @dwc: Pointer to out controller context structure 207272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 207372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Returns 0 on success otherwise negative errno. 207472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 207572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiint __devinit dwc3_gadget_init(struct dwc3 *dwc) 207672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 207772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 207872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 207972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int irq; 208072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 208172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ctrl_req = dma_alloc_coherent(dwc->dev, sizeof(*dwc->ctrl_req), 208272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi &dwc->ctrl_req_addr, GFP_KERNEL); 208372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dwc->ctrl_req) { 208472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to allocate ctrl request\n"); 208572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -ENOMEM; 208672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto err0; 208772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 208872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 208972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ep0_trb = dma_alloc_coherent(dwc->dev, sizeof(*dwc->ep0_trb), 209072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi &dwc->ep0_trb_addr, GFP_KERNEL); 209172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dwc->ep0_trb) { 209272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to allocate ep0 trb\n"); 209372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -ENOMEM; 209472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto err1; 209572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 209672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 20970fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi dwc->setup_buf = kzalloc(sizeof(*dwc->setup_buf) * 2, 20980fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi GFP_KERNEL); 209972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dwc->setup_buf) { 210072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to allocate setup buffer\n"); 210172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -ENOMEM; 210272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto err2; 210372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 210472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 21055812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi dwc->ep0_bounce = dma_alloc_coherent(dwc->dev, 21065812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi 512, &dwc->ep0_bounce_addr, GFP_KERNEL); 21075812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi if (!dwc->ep0_bounce) { 21085812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi dev_err(dwc->dev, "failed to allocate ep0 bounce buffer\n"); 21095812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi ret = -ENOMEM; 21105812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi goto err3; 21115812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi } 21125812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi 211372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_set_name(&dwc->gadget.dev, "gadget"); 211472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 211572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ops = &dwc3_gadget_ops; 2116d327ab5b6d660d6fe22b073b743fde1668e593bbMichal Nazarewicz dwc->gadget.max_speed = USB_SPEED_SUPER; 211772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_UNKNOWN; 211872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.dev.parent = dwc->dev; 2119eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dwc->gadget.sg_supported = true; 212072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 212172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_set_coherent_mask(&dwc->gadget.dev, dwc->dev->coherent_dma_mask); 212272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 212372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.dev.dma_parms = dwc->dev->dma_parms; 212472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.dev.dma_mask = dwc->dev->dma_mask; 212572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.dev.release = dwc3_gadget_release; 212672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.name = "dwc3-gadget"; 212772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 212872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 212972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * REVISIT: Here we should clear all pending IRQs to be 213072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * sure we're starting from a well known location. 213172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 213272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 213372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_gadget_init_endpoints(dwc); 213472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 21355812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi goto err4; 213672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 213772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi irq = platform_get_irq(to_platform_device(dwc->dev), 0); 213872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 213972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = request_irq(irq, dwc3_interrupt, IRQF_SHARED, 214072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi "dwc3", dwc); 214172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 214272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to request irq #%d --> %d\n", 214372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi irq, ret); 21445812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi goto err5; 214572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 214672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 214772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* Enable all but Start and End of Frame IRQs */ 214872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = (DWC3_DEVTEN_VNDRDEVTSTRCVEDEN | 214972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEVTEN_EVNTOVERFLOWEN | 215072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEVTEN_CMDCMPLTEN | 215172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEVTEN_ERRTICERREN | 215272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEVTEN_WKUPEVTEN | 215372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEVTEN_ULSTCNGEN | 215472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEVTEN_CONNECTDONEEN | 215572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEVTEN_USBRSTEN | 215672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEVTEN_DISCONNEVTEN); 215772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEVTEN, reg); 215872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 215972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = device_register(&dwc->gadget.dev); 216072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 216172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to register gadget device\n"); 216272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi put_device(&dwc->gadget.dev); 21635812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi goto err6; 216472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 216572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 216672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = usb_add_gadget_udc(dwc->dev, &dwc->gadget); 216772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 216872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to register udc\n"); 21695812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi goto err7; 217072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 217172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 217272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 217372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 21745812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbierr7: 217572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi device_unregister(&dwc->gadget.dev); 217672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 21775812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbierr6: 217872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEVTEN, 0x00); 217972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi free_irq(irq, dwc); 218072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 21815812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbierr5: 218272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_free_endpoints(dwc); 218372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 21845812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbierr4: 21855812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi dma_free_coherent(dwc->dev, 512, dwc->ep0_bounce, 21865812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi dwc->ep0_bounce_addr); 21875812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi 218872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbierr3: 21890fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi kfree(dwc->setup_buf); 219072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 219172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbierr2: 219272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(*dwc->ep0_trb), 219372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ep0_trb, dwc->ep0_trb_addr); 219472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 219572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbierr1: 219672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(*dwc->ctrl_req), 219772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ctrl_req, dwc->ctrl_req_addr); 219872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 219972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbierr0: 220072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 220172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 220272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 220372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbivoid dwc3_gadget_exit(struct dwc3 *dwc) 220472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 220572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int irq; 220672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 220772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi usb_del_gadget_udc(&dwc->gadget); 220872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi irq = platform_get_irq(to_platform_device(dwc->dev), 0); 220972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 221072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEVTEN, 0x00); 221172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi free_irq(irq, dwc); 221272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 221372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_free_endpoints(dwc); 221472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 22155812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi dma_free_coherent(dwc->dev, 512, dwc->ep0_bounce, 22165812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi dwc->ep0_bounce_addr); 22175812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi 22180fc9a1be09d9f8b19bcf64ab96836cb92beb0970Felipe Balbi kfree(dwc->setup_buf); 221972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 222072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(*dwc->ep0_trb), 222172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ep0_trb, dwc->ep0_trb_addr); 222272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 222372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(*dwc->ctrl_req), 222472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ctrl_req, dwc->ctrl_req_addr); 222572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 222672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi device_unregister(&dwc->gadget.dev); 222772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 2228