gadget.c revision fae2b904aa85beecd0950026de28921ae65fb3da
172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/** 272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * gadget.c - DesignWare USB3 DRD Controller Gadget Framework Link 372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com 572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Authors: Felipe Balbi <balbi@ti.com>, 772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Sebastian Andrzej Siewior <bigeasy@linutronix.de> 872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Redistribution and use in source and binary forms, with or without 1072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * modification, are permitted provided that the following conditions 1172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * are met: 1272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 1. Redistributions of source code must retain the above copyright 1372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * notice, this list of conditions, and the following disclaimer, 1472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * without modification. 1572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 2. Redistributions in binary form must reproduce the above copyright 1672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * notice, this list of conditions and the following disclaimer in the 1772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * documentation and/or other materials provided with the distribution. 1872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 3. The names of the above-listed copyright holders may not be used 1972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * to endorse or promote products derived from this software without 2072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * specific prior written permission. 2172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 2272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * ALTERNATIVELY, this software may be distributed under the terms of the 2372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * GNU General Public License ("GPL") version 2, as published by the Free 2472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Software Foundation. 2572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 2672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS 2772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 2872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 2972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 3072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 3172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 3272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 3372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 3472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 3572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 3672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 3772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 3872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 3972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/kernel.h> 4072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/delay.h> 4172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/slab.h> 4272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/spinlock.h> 4372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/platform_device.h> 4472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/pm_runtime.h> 4572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/interrupt.h> 4672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/io.h> 4772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/list.h> 4872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/dma-mapping.h> 4972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 5072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/usb/ch9.h> 5172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include <linux/usb/gadget.h> 5272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 5372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include "core.h" 5472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include "gadget.h" 5572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#include "io.h" 5672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 5772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#define DMA_ADDR_INVALID (~(dma_addr_t)0) 5872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 5972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbivoid dwc3_map_buffer_to_dma(struct dwc3_request *req) 6072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 6172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = req->dep->dwc; 6272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 6378c58a53c9864447f2a46d4c06dd3c2616823ad2Sebastian Andrzej Siewior if (req->request.length == 0) { 6478c58a53c9864447f2a46d4c06dd3c2616823ad2Sebastian Andrzej Siewior /* req->request.dma = dwc->setup_buf_addr; */ 6578c58a53c9864447f2a46d4c06dd3c2616823ad2Sebastian Andrzej Siewior return; 6678c58a53c9864447f2a46d4c06dd3c2616823ad2Sebastian Andrzej Siewior } 6778c58a53c9864447f2a46d4c06dd3c2616823ad2Sebastian Andrzej Siewior 6872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (req->request.dma == DMA_ADDR_INVALID) { 6972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.dma = dma_map_single(dwc->dev, req->request.buf, 7072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.length, req->direction 7172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ? DMA_TO_DEVICE : DMA_FROM_DEVICE); 7272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->mapped = true; 7372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 7472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 7572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 7672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbivoid dwc3_unmap_buffer_from_dma(struct dwc3_request *req) 7772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 7872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = req->dep->dwc; 7972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 8078c58a53c9864447f2a46d4c06dd3c2616823ad2Sebastian Andrzej Siewior if (req->request.length == 0) { 8178c58a53c9864447f2a46d4c06dd3c2616823ad2Sebastian Andrzej Siewior req->request.dma = DMA_ADDR_INVALID; 8278c58a53c9864447f2a46d4c06dd3c2616823ad2Sebastian Andrzej Siewior return; 8378c58a53c9864447f2a46d4c06dd3c2616823ad2Sebastian Andrzej Siewior } 8478c58a53c9864447f2a46d4c06dd3c2616823ad2Sebastian Andrzej Siewior 8572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (req->mapped) { 8672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_unmap_single(dwc->dev, req->request.dma, 8772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.length, req->direction 8872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ? DMA_TO_DEVICE : DMA_FROM_DEVICE); 8972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->mapped = 0; 90f198ead21bcb7b03d7bb2cba7ba0f5ad615a3862Felipe Balbi req->request.dma = DMA_ADDR_INVALID; 9172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 9272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 9372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 9472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbivoid dwc3_gadget_giveback(struct dwc3_ep *dep, struct dwc3_request *req, 9572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int status) 9672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 9772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 9872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 9972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (req->queued) { 10072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->busy_slot++; 10172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 10272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Skip LINK TRB. We can't use req->trb and check for 10372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * DWC3_TRBCTL_LINK_TRB because it points the TRB we just 10472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * completed (not the LINK TRB). 10572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 10672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (((dep->busy_slot & DWC3_TRB_MASK) == DWC3_TRB_NUM - 1) && 10772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi usb_endpoint_xfer_isoc(dep->desc)) 10872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->busy_slot++; 10972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 11072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_del(&req->list); 11172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 11272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (req->request.status == -EINPROGRESS) 11372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.status = status; 11472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 11572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_unmap_buffer_from_dma(req); 11672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 11772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "request %p from %s completed %d/%d ===> %d\n", 11872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req, dep->name, req->request.actual, 11972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.length, status); 12072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 12172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock(&dwc->lock); 12272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.complete(&req->dep->endpoint, &req->request); 12372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock(&dwc->lock); 12472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 12572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 12672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic const char *dwc3_gadget_ep_cmd_string(u8 cmd) 12772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 12872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (cmd) { 12972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_DEPSTARTCFG: 13072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Start New Configuration"; 13172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_ENDTRANSFER: 13272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "End Transfer"; 13372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_UPDATETRANSFER: 13472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Update Transfer"; 13572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_STARTTRANSFER: 13672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Start Transfer"; 13772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_CLEARSTALL: 13872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Clear Stall"; 13972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_SETSTALL: 14072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Set Stall"; 14172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_GETSEQNUMBER: 14272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Get Data Sequence Number"; 14372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_SETTRANSFRESOURCE: 14472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Set Endpoint Transfer Resource"; 14572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_SETEPCONFIG: 14672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Set Endpoint Configuration"; 14772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 14872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "UNKNOWN command"; 14972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 15072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 15172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 15272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiint dwc3_send_gadget_ep_cmd(struct dwc3 *dwc, unsigned ep, 15372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned cmd, struct dwc3_gadget_ep_cmd_params *params) 15472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 15572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = dwc->eps[ep]; 15661d58242f634642de42d6a4098913b7254a65053Sebastian Andrzej Siewior u32 timeout = 500; 15772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 15872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 15972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s: cmd '%s' params %08x %08x %08x\n", 16072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name, 161dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi dwc3_gadget_ep_cmd_string(cmd), params->param0, 162dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params->param1, params->param2); 16372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 164dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEPCMDPAR0(ep), params->param0); 165dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEPCMDPAR1(ep), params->param1); 166dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEPCMDPAR2(ep), params->param2); 16772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 16872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEPCMD(ep), cmd | DWC3_DEPCMD_CMDACT); 16972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi do { 17072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DEPCMD(ep)); 17172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(reg & DWC3_DEPCMD_CMDACT)) { 172164f6e141ed214bda30fb219d41ec3254bd90886Felipe Balbi dev_vdbg(dwc->dev, "Command Complete --> %d\n", 173164f6e141ed214bda30fb219d41ec3254bd90886Felipe Balbi DWC3_DEPCMD_STATUS(reg)); 17472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 17572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 17672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 17772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 17872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We can't sleep here, because it is also called from 17972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * interrupt context. 18072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 18172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi timeout--; 18272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!timeout) 18372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -ETIMEDOUT; 18472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 18561d58242f634642de42d6a4098913b7254a65053Sebastian Andrzej Siewior udelay(1); 18672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } while (1); 18772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 18872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 18972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic dma_addr_t dwc3_trb_dma_offset(struct dwc3_ep *dep, 19072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_trb_hw *trb) 19172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 192c439ef87c33a1df30f528cb152151465c2529cacPaul Zimmerman u32 offset = (char *) trb - (char *) dep->trb_pool; 19372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 19472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return dep->trb_pool_dma + offset; 19572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 19672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 19772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_alloc_trb_pool(struct dwc3_ep *dep) 19872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 19972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 20072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 20172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->trb_pool) 20272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 20372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 20472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->number == 0 || dep->number == 1) 20572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 20672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 20772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->trb_pool = dma_alloc_coherent(dwc->dev, 20872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi sizeof(struct dwc3_trb) * DWC3_TRB_NUM, 20972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi &dep->trb_pool_dma, GFP_KERNEL); 21072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dep->trb_pool) { 21172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dep->dwc->dev, "failed to allocate trb pool for %s\n", 21272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 21372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -ENOMEM; 21472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 21572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 21672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 21772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 21872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 21972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_free_trb_pool(struct dwc3_ep *dep) 22072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 22172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 22272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 22372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(struct dwc3_trb) * DWC3_TRB_NUM, 22472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->trb_pool, dep->trb_pool_dma); 22572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 22672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->trb_pool = NULL; 22772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->trb_pool_dma = 0; 22872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 22972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 23072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_start_config(struct dwc3 *dwc, struct dwc3_ep *dep) 23172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 23272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 23372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 cmd; 23472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 23572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0x00, sizeof(params)); 23672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 23772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->number != 1) { 23872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd = DWC3_DEPCMD_DEPSTARTCFG; 23972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* XferRscIdx == 0 for ep0 and 2 for the remaining */ 240b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman if (dep->number > 1) { 241b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman if (dwc->start_config_issued) 242b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman return 0; 243b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman dwc->start_config_issued = true; 24472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd |= DWC3_DEPCMD_PARAM(2); 245b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman } 24672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 24772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return dwc3_send_gadget_ep_cmd(dwc, 0, cmd, ¶ms); 24872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 24972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 25072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 25172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 25272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 25372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_set_ep_config(struct dwc3 *dwc, struct dwc3_ep *dep, 25472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct usb_endpoint_descriptor *desc) 25572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 25672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 25772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 25872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0x00, sizeof(params)); 25972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 260dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param0 = DWC3_DEPCFG_EP_TYPE(usb_endpoint_type(desc)) 261dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi | DWC3_DEPCFG_MAX_PACKET_SIZE(usb_endpoint_maxp(desc)) 262dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi | DWC3_DEPCFG_BURST_SIZE(dep->endpoint.maxburst); 26372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 264dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param1 = DWC3_DEPCFG_XFER_COMPLETE_EN 265dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi | DWC3_DEPCFG_XFER_NOT_READY_EN; 26672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 267879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi if (usb_endpoint_xfer_bulk(desc) && dep->endpoint.max_streams) { 268dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param1 |= DWC3_DEPCFG_STREAM_CAPABLE 269dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi | DWC3_DEPCFG_STREAM_EVENT_EN; 270879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dep->stream_capable = true; 271879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi } 272879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi 27372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (usb_endpoint_xfer_isoc(desc)) 274dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param1 |= DWC3_DEPCFG_XFER_IN_PROGRESS_EN; 27572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 27672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 27772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We are doing 1:1 mapping for endpoints, meaning 27872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Physical Endpoints 2 maps to Logical Endpoint 2 and 27972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * so on. We consider the direction bit as part of the physical 28072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * endpoint number. So USB endpoint 0x81 is 0x03. 28172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 282dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param1 |= DWC3_DEPCFG_EP_NUMBER(dep->number); 28372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 28472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 28572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We must use the lower 16 TX FIFOs even though 28672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * HW might have more 28772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 28872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->direction) 289dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param0 |= DWC3_DEPCFG_FIFO_NUMBER(dep->number >> 1); 29072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 29172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (desc->bInterval) { 292dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param1 |= DWC3_DEPCFG_BINTERVAL_M1(desc->bInterval - 1); 29372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->interval = 1 << (desc->bInterval - 1); 29472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 29572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 29672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return dwc3_send_gadget_ep_cmd(dwc, dep->number, 29772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEPCMD_SETEPCONFIG, ¶ms); 29872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 29972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 30072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_set_xfer_resource(struct dwc3 *dwc, struct dwc3_ep *dep) 30172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 30272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 30372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 30472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0x00, sizeof(params)); 30572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 306dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param0 = DWC3_DEPXFERCFG_NUM_XFER_RES(1); 30772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 30872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return dwc3_send_gadget_ep_cmd(dwc, dep->number, 30972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEPCMD_SETTRANSFRESOURCE, ¶ms); 31072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 31172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 31272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/** 31372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * __dwc3_gadget_ep_enable - Initializes a HW endpoint 31472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * @dep: endpoint to be initialized 31572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * @desc: USB Endpoint Descriptor 31672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 31772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Caller should take care of locking 31872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 31972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int __dwc3_gadget_ep_enable(struct dwc3_ep *dep, 32072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct usb_endpoint_descriptor *desc) 32172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 32272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 32372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 32472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret = -ENOMEM; 32572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 32672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) { 32772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_gadget_start_config(dwc, dep); 32872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 32972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 33072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 33172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 33272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_gadget_set_ep_config(dwc, dep, desc); 33372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 33472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 33572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 33672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) { 33772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_trb_hw *trb_st_hw; 33872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_trb_hw *trb_link_hw; 33972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_trb trb_link; 34072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 34172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_gadget_set_xfer_resource(dwc, dep); 34272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 34372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 34472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 34572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->desc = desc; 34672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->type = usb_endpoint_type(desc); 34772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags |= DWC3_EP_ENABLED; 34872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 34972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DALEPENA); 35072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg |= DWC3_DALEPENA_EP(dep->number); 35172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DALEPENA, reg); 35272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 35372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!usb_endpoint_xfer_isoc(desc)) 35472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 35572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 35672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(&trb_link, 0, sizeof(trb_link)); 35772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 35872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* Link TRB for ISOC. The HWO but is never reset */ 35972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trb_st_hw = &dep->trb_pool[0]; 36072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 36172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trb_link.bplh = dwc3_trb_dma_offset(dep, trb_st_hw); 36272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trb_link.trbctl = DWC3_TRBCTL_LINK_TRB; 36372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trb_link.hwo = true; 36472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 36572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trb_link_hw = &dep->trb_pool[DWC3_TRB_NUM - 1]; 36672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_trb_to_hw(&trb_link, trb_link_hw); 36772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 36872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 36972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 37072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 37172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 372624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewiorstatic void dwc3_stop_active_transfer(struct dwc3 *dwc, u32 epnum); 373624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewiorstatic void dwc3_remove_requests(struct dwc3 *dwc, struct dwc3_ep *dep) 37472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 37572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req; 37672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 377624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior if (!list_empty(&dep->req_queued)) 378624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior dwc3_stop_active_transfer(dwc, dep->number); 379624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior 38072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi while (!list_empty(&dep->request_list)) { 38172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req = next_request(&dep->request_list); 38272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 383624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior dwc3_gadget_giveback(dep, req, -ESHUTDOWN); 38472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 38572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 38672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 38772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/** 38872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * __dwc3_gadget_ep_disable - Disables a HW endpoint 38972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * @dep: the endpoint to disable 39072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 391624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior * This function also removes requests which are currently processed ny the 392624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior * hardware and those which are not yet scheduled. 393624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior * Caller should take care of locking. 39472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 39572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int __dwc3_gadget_ep_disable(struct dwc3_ep *dep) 39672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 39772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 39872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 39972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 400624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior dwc3_remove_requests(dwc, dep); 40172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 40272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DALEPENA); 40372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DALEPENA_EP(dep->number); 40472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DALEPENA, reg); 40572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 406879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dep->stream_capable = false; 40772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->desc = NULL; 40872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->type = 0; 409879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dep->flags = 0; 41072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 41172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 41272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 41372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 41472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 41572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 41672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep0_enable(struct usb_ep *ep, 41772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct usb_endpoint_descriptor *desc) 41872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 41972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EINVAL; 42072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 42172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 42272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep0_disable(struct usb_ep *ep) 42372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 42472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EINVAL; 42572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 42672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 42772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 42872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 42972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_enable(struct usb_ep *ep, 43072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct usb_endpoint_descriptor *desc) 43172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 43272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 43372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc; 43472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 43572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 43672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 43772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!ep || !desc || desc->bDescriptorType != USB_DT_ENDPOINT) { 43872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi pr_debug("dwc3: invalid parameters\n"); 43972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EINVAL; 44072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 44172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 44272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!desc->wMaxPacketSize) { 44372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi pr_debug("dwc3: missing wMaxPacketSize\n"); 44472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EINVAL; 44572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 44672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 44772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = to_dwc3_ep(ep); 44872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc = dep->dwc; 44972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 45072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (usb_endpoint_type(desc)) { 45172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_ENDPOINT_XFER_CONTROL: 45272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi strncat(dep->name, "-control", sizeof(dep->name)); 45372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 45472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_ENDPOINT_XFER_ISOC: 45572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi strncat(dep->name, "-isoc", sizeof(dep->name)); 45672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 45772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_ENDPOINT_XFER_BULK: 45872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi strncat(dep->name, "-bulk", sizeof(dep->name)); 45972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 46072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_ENDPOINT_XFER_INT: 46172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi strncat(dep->name, "-int", sizeof(dep->name)); 46272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 46372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 46472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "invalid endpoint transfer type\n"); 46572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 46672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 46772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->flags & DWC3_EP_ENABLED) { 46872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_WARN_ONCE(dwc->dev, true, "%s is already enabled\n", 46972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 47072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 47172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 47272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 47372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "Enabling %s\n", dep->name); 47472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 47572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 47672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = __dwc3_gadget_ep_enable(dep, desc); 47772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 47872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 47972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 48072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 48172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 48272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_disable(struct usb_ep *ep) 48372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 48472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 48572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc; 48672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 48772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 48872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 48972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!ep) { 49072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi pr_debug("dwc3: invalid parameters\n"); 49172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EINVAL; 49272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 49372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 49472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = to_dwc3_ep(ep); 49572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc = dep->dwc; 49672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 49772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) { 49872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_WARN_ONCE(dwc->dev, true, "%s is already disabled\n", 49972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 50072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 50172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 50272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 50372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi snprintf(dep->name, sizeof(dep->name), "ep%d%s", 50472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->number >> 1, 50572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi (dep->number & 1) ? "in" : "out"); 50672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 50772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 50872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = __dwc3_gadget_ep_disable(dep); 50972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 51072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 51172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 51272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 51372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 51472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic struct usb_request *dwc3_gadget_ep_alloc_request(struct usb_ep *ep, 51572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi gfp_t gfp_flags) 51672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 51772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req; 51872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = to_dwc3_ep(ep); 51972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 52072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 52172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req = kzalloc(sizeof(*req), gfp_flags); 52272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!req) { 52372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "not enough memory\n"); 52472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return NULL; 52572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 52672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 52772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->epnum = dep->number; 52872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->dep = dep; 52972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.dma = DMA_ADDR_INVALID; 53072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 53172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return &req->request; 53272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 53372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 53472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_ep_free_request(struct usb_ep *ep, 53572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct usb_request *request) 53672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 53772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req = to_dwc3_request(request); 53872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 53972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi kfree(req); 54072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 54172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 54272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* 54372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * dwc3_prepare_trbs - setup TRBs from requests 54472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * @dep: endpoint for which requests are being prepared 54572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * @starting: true if the endpoint is idle and no requests are queued. 54672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 54772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * The functions goes through the requests list and setups TRBs for the 54872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * transfers. The functions returns once there are not more TRBs available or 54972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * it run out of requests. 55072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 55172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic struct dwc3_request *dwc3_prepare_trbs(struct dwc3_ep *dep, 55272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi bool starting) 55372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 55472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req, *n, *ret = NULL; 55572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_trb_hw *trb_hw; 55672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_trb trb; 55772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 trbs_left; 55872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 55972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi BUILD_BUG_ON_NOT_POWER_OF_2(DWC3_TRB_NUM); 56072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 56172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* the first request must not be queued */ 56272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trbs_left = (dep->busy_slot - dep->free_slot) & DWC3_TRB_MASK; 56372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 56472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * if busy & slot are equal than it is either full or empty. If we are 56572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * starting to proceed requests then we are empty. Otherwise we ar 56672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * full and don't do anything 56772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 56872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!trbs_left) { 56972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!starting) 57072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return NULL; 57172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trbs_left = DWC3_TRB_NUM; 57272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 57372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * In case we start from scratch, we queue the ISOC requests 57472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * starting from slot 1. This is done because we use ring 57572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * buffer and have no LST bit to stop us. Instead, we place 57672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * IOC bit TRB_NUM/4. We try to avoid to having an interrupt 57772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * after the first request so we start at slot 1 and have 57872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 7 requests proceed before we hit the first IOC. 57972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Other transfer types don't use the ring buffer and are 58072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * processed from the first TRB until the last one. Since we 58172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * don't wrap around we have to start at the beginning. 58272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 58372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (usb_endpoint_xfer_isoc(dep->desc)) { 58472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->busy_slot = 1; 58572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->free_slot = 1; 58672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 58772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->busy_slot = 0; 58872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->free_slot = 0; 58972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 59072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 59172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 59272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* The last TRB is a link TRB, not used for xfer */ 59372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if ((trbs_left <= 1) && usb_endpoint_xfer_isoc(dep->desc)) 59472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return NULL; 59572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 59672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_for_each_entry_safe(req, n, &dep->request_list, list) { 59772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned int last_one = 0; 59872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned int cur_slot; 59972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 60072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trb_hw = &dep->trb_pool[dep->free_slot & DWC3_TRB_MASK]; 60172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cur_slot = dep->free_slot; 60272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->free_slot++; 60372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 60472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* Skip the LINK-TRB on ISOC */ 60572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (((cur_slot & DWC3_TRB_MASK) == DWC3_TRB_NUM - 1) && 60672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi usb_endpoint_xfer_isoc(dep->desc)) 60772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi continue; 60872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 60972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_move_request_queued(req); 61072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(&trb, 0, sizeof(trb)); 61172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trbs_left--; 61272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 61372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* Is our TRB pool empty? */ 61472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!trbs_left) 61572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi last_one = 1; 61672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* Is this the last request? */ 61772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (list_empty(&dep->request_list)) 61872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi last_one = 1; 61972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 62072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 62172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * FIXME we shouldn't need to set LST bit always but we are 62272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * facing some weird problem with the Hardware where it doesn't 62372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * complete even though it has been previously started. 62472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 62572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * While we're debugging the problem, as a workaround to 62672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * multiple TRBs handling, use only one TRB at a time. 62772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 62872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi last_one = 1; 62972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 63072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->trb = trb_hw; 63172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!ret) 63272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = req; 63372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 63472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trb.bplh = req->request.dma; 63572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 63672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (usb_endpoint_xfer_isoc(dep->desc)) { 63772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trb.isp_imi = true; 63872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trb.csp = true; 63972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 64072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trb.lst = last_one; 64172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 64272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 643879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi if (usb_endpoint_xfer_bulk(dep->desc) && dep->stream_capable) 644879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi trb.sid_sofn = req->request.stream_id; 645879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi 64672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (usb_endpoint_type(dep->desc)) { 64772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_ENDPOINT_XFER_CONTROL: 64872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trb.trbctl = DWC3_TRBCTL_CONTROL_SETUP; 64972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 65072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 65172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_ENDPOINT_XFER_ISOC: 6525a18999ebd880f6fc4264aa5687daad4c4013bceSebastian Andrzej Siewior trb.trbctl = DWC3_TRBCTL_ISOCHRONOUS_FIRST; 65372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 65472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* IOC every DWC3_TRB_NUM / 4 so we can refill */ 65572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(cur_slot % (DWC3_TRB_NUM / 4))) 65672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trb.ioc = last_one; 65772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 65872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 65972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_ENDPOINT_XFER_BULK: 66072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_ENDPOINT_XFER_INT: 66172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trb.trbctl = DWC3_TRBCTL_NORMAL; 66272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 66372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 66472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 66572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * This is only possible with faulty memory because we 66672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * checked it already :) 66772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 66872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi BUG(); 66972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 67072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 67172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trb.length = req->request.length; 67272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trb.hwo = true; 67372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 67472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_trb_to_hw(&trb, trb_hw); 67572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->trb_dma = dwc3_trb_dma_offset(dep, trb_hw); 67672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 67772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (last_one) 67872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 67972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 68072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 68172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 68272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 68372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 68472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int __dwc3_gadget_kick_transfer(struct dwc3_ep *dep, u16 cmd_param, 68572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int start_new) 68672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 68772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 68872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req; 68972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 69072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 69172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 cmd; 69272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 69372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (start_new && (dep->flags & DWC3_EP_BUSY)) { 69472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s: endpoint busy\n", dep->name); 69572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EBUSY; 69672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 69772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags &= ~DWC3_EP_PENDING_REQUEST; 69872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 69972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 70072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * If we are getting here after a short-out-packet we don't enqueue any 70172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * new requests as we try to set the IOC bit only on the last request. 70272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 70372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (start_new) { 70472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (list_empty(&dep->req_queued)) 70572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_prepare_trbs(dep, start_new); 70672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 70772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* req points to the first request which will be sent */ 70872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req = next_request(&dep->req_queued); 70972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 71072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 71172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * req points to the first request where HWO changed 71272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * from 0 to 1 71372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 71472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req = dwc3_prepare_trbs(dep, start_new); 71572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 71672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!req) { 71772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags |= DWC3_EP_PENDING_REQUEST; 71872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 71972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 72072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 72172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0, sizeof(params)); 722dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param0 = upper_32_bits(req->trb_dma); 723dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param1 = lower_32_bits(req->trb_dma); 72472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 72572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (start_new) 72672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd = DWC3_DEPCMD_STARTTRANSFER; 72772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi else 72872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd = DWC3_DEPCMD_UPDATETRANSFER; 72972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 73072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd |= DWC3_DEPCMD_PARAM(cmd_param); 73172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, cmd, ¶ms); 73272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret < 0) { 73372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "failed to send STARTTRANSFER command\n"); 73472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 73572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 73672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * FIXME we need to iterate over the list of requests 73772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * here and stop, unmap, free and del each of the linked 73872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * requests instead of we do now. 73972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 74072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_unmap_buffer_from_dma(req); 74172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_del(&req->list); 74272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 74372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 74472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 74572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags |= DWC3_EP_BUSY; 74672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->res_trans_idx = dwc3_gadget_ep_get_transfer_index(dwc, 74772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->number); 74825b8ff68bf1d4954d4a9dcb4862c6b6a53cb09e2Felipe Balbi 74925b8ff68bf1d4954d4a9dcb4862c6b6a53cb09e2Felipe Balbi WARN_ON_ONCE(!dep->res_trans_idx); 75025b8ff68bf1d4954d4a9dcb4862c6b6a53cb09e2Felipe Balbi 75172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 75272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 75372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 75472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int __dwc3_gadget_ep_queue(struct dwc3_ep *dep, struct dwc3_request *req) 75572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 75672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.actual = 0; 75772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.status = -EINPROGRESS; 75872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->direction = dep->direction; 75972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->epnum = dep->number; 76072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 76172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 76272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We only add to our list of requests now and 76372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * start consuming the list once we get XferNotReady 76472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * IRQ. 76572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 76672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * That way, we avoid doing anything that we don't need 76772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * to do now and defer it until the point we receive a 76872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * particular token from the Host side. 76972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 77072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * This will also avoid Host cancelling URBs due to too 77172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * many NACKs. 77272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 77372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_map_buffer_to_dma(req); 77472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_add_tail(&req->list, &dep->request_list); 77572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 77672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 77772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * There is one special case: XferNotReady with 77872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * empty list of requests. We need to kick the 77972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * transfer here in that situation, otherwise 78072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * we will be NAKing forever. 78172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 78272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * If we get XferNotReady before gadget driver 78372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * has a chance to queue a request, we will ACK 78472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * the IRQ but won't be able to receive the data 78572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * until the next request is queued. The following 78672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * code is handling exactly that. 78772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 78872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->flags & DWC3_EP_PENDING_REQUEST) { 78972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 79072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int start_trans; 79172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 79272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi start_trans = 1; 79372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (usb_endpoint_xfer_isoc(dep->endpoint.desc) && 79472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags & DWC3_EP_BUSY) 79572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi start_trans = 0; 79672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 79772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = __dwc3_gadget_kick_transfer(dep, 0, start_trans); 79872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret && ret != -EBUSY) { 79972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 80072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 80172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "%s: failed to kick transfers\n", 80272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 80372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 80472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi }; 80572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 80672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 80772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 80872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 80972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_queue(struct usb_ep *ep, struct usb_request *request, 81072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi gfp_t gfp_flags) 81172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 81272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req = to_dwc3_request(request); 81372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = to_dwc3_ep(ep); 81472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 81572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 81672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 81772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 81872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 81972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 82072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dep->desc) { 82172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "trying to queue request %p to disabled %s\n", 82272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi request, ep->name); 82372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -ESHUTDOWN; 82472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 82572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 82672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "queing request %p to %s length %d\n", 82772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi request, ep->name, request->length); 82872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 82972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 83072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = __dwc3_gadget_ep_queue(dep, req); 83172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 83272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 83372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 83472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 83572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 83672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_dequeue(struct usb_ep *ep, 83772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct usb_request *request) 83872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 83972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req = to_dwc3_request(request); 84072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *r = NULL; 84172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 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 int ret = 0; 84772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 84872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 84972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 85072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_for_each_entry(r, &dep->request_list, list) { 85172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (r == req) 85272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 85372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 85472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 85572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (r != req) { 85672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_for_each_entry(r, &dep->req_queued, list) { 85772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (r == req) 85872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 85972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 86072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (r == req) { 86172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* wait until it is processed */ 86272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_stop_active_transfer(dwc, dep->number); 86372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto out0; 86472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 86572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "request %p was not queued to %s\n", 86672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi request, ep->name); 86772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EINVAL; 86872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto out0; 86972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 87072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 87172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* giveback the request */ 87272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_giveback(dep, req, -ECONNRESET); 87372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 87472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiout0: 87572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 87672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 87772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 87872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 87972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 88072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiint __dwc3_gadget_ep_set_halt(struct dwc3_ep *dep, int value) 88172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 88272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 88372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 88472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 88572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 88672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0x00, sizeof(params)); 88772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 88872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (value) { 8890b7836a9eb32f626ffd3fe3045e8c618cb8ed965Felipe Balbi if (dep->number == 0 || dep->number == 1) { 8900b7836a9eb32f626ffd3fe3045e8c618cb8ed965Felipe Balbi /* 8910b7836a9eb32f626ffd3fe3045e8c618cb8ed965Felipe Balbi * Whenever EP0 is stalled, we will restart 8920b7836a9eb32f626ffd3fe3045e8c618cb8ed965Felipe Balbi * the state machine, thus moving back to 8930b7836a9eb32f626ffd3fe3045e8c618cb8ed965Felipe Balbi * Setup Phase 8940b7836a9eb32f626ffd3fe3045e8c618cb8ed965Felipe Balbi */ 8950b7836a9eb32f626ffd3fe3045e8c618cb8ed965Felipe Balbi dwc->ep0state = EP0_SETUP_PHASE; 8960b7836a9eb32f626ffd3fe3045e8c618cb8ed965Felipe Balbi } 89772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 89872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, 89972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEPCMD_SETSTALL, ¶ms); 90072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 90172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to %s STALL on %s\n", 90272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi value ? "set" : "clear", 90372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 90472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi else 90572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags |= DWC3_EP_STALL; 90672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 9075275455a6e6ae6b57303834b0afd267bb9657ffcPaul Zimmerman if (dep->flags & DWC3_EP_WEDGE) 9085275455a6e6ae6b57303834b0afd267bb9657ffcPaul Zimmerman return 0; 9095275455a6e6ae6b57303834b0afd267bb9657ffcPaul Zimmerman 91072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, 91172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEPCMD_CLEARSTALL, ¶ms); 91272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 91372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to %s STALL on %s\n", 91472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi value ? "set" : "clear", 91572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 91672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi else 91772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags &= ~DWC3_EP_STALL; 91872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 9195275455a6e6ae6b57303834b0afd267bb9657ffcPaul Zimmerman 92072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 92172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 92272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 92372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_set_halt(struct usb_ep *ep, int value) 92472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 92572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = to_dwc3_ep(ep); 92672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 92772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 92872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 92972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 93072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 93172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 93272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 93372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 93472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (usb_endpoint_xfer_isoc(dep->desc)) { 93572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "%s is of Isochronous type\n", dep->name); 93672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EINVAL; 93772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto out; 93872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 93972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 94072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = __dwc3_gadget_ep_set_halt(dep, value); 94172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiout: 94272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 94372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 94472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 94572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 94672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 94772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_set_wedge(struct usb_ep *ep) 94872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 94972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = to_dwc3_ep(ep); 95072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 95172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags |= DWC3_EP_WEDGE; 95272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 9535275455a6e6ae6b57303834b0afd267bb9657ffcPaul Zimmerman return dwc3_gadget_ep_set_halt(ep, 1); 95472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 95572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 95672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 95772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 95872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic struct usb_endpoint_descriptor dwc3_gadget_ep0_desc = { 95972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .bLength = USB_DT_ENDPOINT_SIZE, 96072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .bDescriptorType = USB_DT_ENDPOINT, 96172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .bmAttributes = USB_ENDPOINT_XFER_CONTROL, 96272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi}; 96372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 96472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic const struct usb_ep_ops dwc3_gadget_ep0_ops = { 96572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .enable = dwc3_gadget_ep0_enable, 96672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .disable = dwc3_gadget_ep0_disable, 96772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .alloc_request = dwc3_gadget_ep_alloc_request, 96872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .free_request = dwc3_gadget_ep_free_request, 96972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .queue = dwc3_gadget_ep0_queue, 97072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .dequeue = dwc3_gadget_ep_dequeue, 97172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .set_halt = dwc3_gadget_ep_set_halt, 97272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .set_wedge = dwc3_gadget_ep_set_wedge, 97372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi}; 97472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 97572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic const struct usb_ep_ops dwc3_gadget_ep_ops = { 97672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .enable = dwc3_gadget_ep_enable, 97772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .disable = dwc3_gadget_ep_disable, 97872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .alloc_request = dwc3_gadget_ep_alloc_request, 97972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .free_request = dwc3_gadget_ep_free_request, 98072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .queue = dwc3_gadget_ep_queue, 98172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .dequeue = dwc3_gadget_ep_dequeue, 98272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .set_halt = dwc3_gadget_ep_set_halt, 98372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .set_wedge = dwc3_gadget_ep_set_wedge, 98472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi}; 98572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 98672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 98772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 98872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_get_frame(struct usb_gadget *g) 98972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 99072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 99172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 99272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 99372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 99472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return DWC3_DSTS_SOFFN(reg); 99572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 99672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 99772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_wakeup(struct usb_gadget *g) 99872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 99972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 100072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 100172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long timeout; 100272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 100372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 100472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 100572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 100672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret = 0; 100772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 100872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 link_state; 100972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 speed; 101072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 101172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 101272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 101372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 101472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * According to the Databook Remote wakeup request should 101572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * be issued only when the device is in early suspend state. 101672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 101772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We can check that via USB Link State bits in DSTS register. 101872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 101972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 102072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 102172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi speed = reg & DWC3_DSTS_CONNECTSPD; 102272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (speed == DWC3_DSTS_SUPERSPEED) { 102372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "no wakeup on SuperSpeed\n"); 102472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EINVAL; 102572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto out; 102672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 102772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 102872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi link_state = DWC3_DSTS_USBLNKST(reg); 102972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 103072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (link_state) { 103172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_LINK_STATE_RX_DET: /* in HS, means Early Suspend */ 103272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_LINK_STATE_U3: /* in HS, means SUSPEND */ 103372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 103472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 103572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "can't wakeup from link state %d\n", 103672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi link_state); 103772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EINVAL; 103872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto out; 103972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 104072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 104172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 104272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 104372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 104472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Switch link state to Recovery. In HS/FS/LS this means 104572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * RemoteWakeup Request 104672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 104772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg |= DWC3_DCTL_ULSTCHNG_RECOVERY; 104872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 104972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 105072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* wait for at least 2000us */ 105172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi usleep_range(2000, 2500); 105272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 105372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* write zeroes to Link Change Request */ 105472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DCTL_ULSTCHNGREQ_MASK; 105572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 105672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 105772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* pool until Link State change to ON */ 105872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi timeout = jiffies + msecs_to_jiffies(100); 105972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 106072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi while (!(time_after(jiffies, timeout))) { 106172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 106272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 106372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* in HS, means ON */ 106472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (DWC3_DSTS_USBLNKST(reg) == DWC3_LINK_STATE_U0) 106572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 106672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 106772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 106872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (DWC3_DSTS_USBLNKST(reg) != DWC3_LINK_STATE_U0) { 106972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to send remote wakeup\n"); 107072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EINVAL; 107172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 107272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 107372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiout: 107472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 107572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 107672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 107772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 107872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 107972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_set_selfpowered(struct usb_gadget *g, 108072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int is_selfpowered) 108172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 108272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 108372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 108472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->is_selfpowered = !!is_selfpowered; 108572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 108672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 108772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 108872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 108972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_run_stop(struct dwc3 *dwc, int is_on) 109072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 109172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 109261d58242f634642de42d6a4098913b7254a65053Sebastian Andrzej Siewior u32 timeout = 500; 109372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 109472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 109572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (is_on) 109672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg |= DWC3_DCTL_RUN_STOP; 109772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi else 109872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DCTL_RUN_STOP; 109972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 110072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 110172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 110272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi do { 110372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 110472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (is_on) { 110572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(reg & DWC3_DSTS_DEVCTRLHLT)) 110672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 110772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 110872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (reg & DWC3_DSTS_DEVCTRLHLT) 110972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 111072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 111172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi timeout--; 111272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!timeout) 111372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 111461d58242f634642de42d6a4098913b7254a65053Sebastian Andrzej Siewior udelay(1); 111572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } while (1); 111672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 111772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "gadget %s data soft-%s\n", 111872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver 111972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ? dwc->gadget_driver->function : "no-function", 112072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi is_on ? "connect" : "disconnect"); 112172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 112272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 112372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_pullup(struct usb_gadget *g, int is_on) 112472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 112572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 112672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 112772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 112872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi is_on = !!is_on; 112972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 113072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 113172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_run_stop(dwc, is_on); 113272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 113372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 113472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 113572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 113672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 113772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_start(struct usb_gadget *g, 113872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct usb_gadget_driver *driver) 113972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 114072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 114172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 114272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 114372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret = 0; 114472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 114572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 114672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 114772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 114872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dwc->gadget_driver) { 114972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "%s is already bound to %s\n", 115072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.name, 115172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver->driver.name); 115272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EBUSY; 115372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto err0; 115472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 115572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 115672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver = driver; 115772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.dev.driver = &driver->driver; 115872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 115972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCFG); 116072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~(DWC3_DCFG_SPEED_MASK); 11616c167fc9b0c23ead791edb94cf4debb6b8e534b5Felipe Balbi reg |= dwc->maximum_speed; 116272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCFG, reg); 116372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1164b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman dwc->start_config_issued = false; 1165b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman 116672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* Start with SuperSpeed Default */ 116772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(512); 116872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 116972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[0]; 117072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc); 117172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 117272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to enable %s\n", dep->name); 117372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto err0; 117472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 117572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 117672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[1]; 117772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc); 117872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 117972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to enable %s\n", dep->name); 118072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto err1; 118172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 118272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 118372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* begin to receive SETUP packets */ 1184c7fcdeb2627c46b7ec3f0bcb2054b10405f9a70eFelipe Balbi dwc->ep0state = EP0_SETUP_PHASE; 118572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_ep0_out_start(dwc); 118672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 118772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 118872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 118972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 119072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 119172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbierr1: 119272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi __dwc3_gadget_ep_disable(dwc->eps[0]); 119372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 119472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbierr0: 119572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 119672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 119772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 119872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 119972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 120072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_stop(struct usb_gadget *g, 120172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct usb_gadget_driver *driver) 120272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 120372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 120472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 120572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 120672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 120772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 120872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi __dwc3_gadget_ep_disable(dwc->eps[0]); 120972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi __dwc3_gadget_ep_disable(dwc->eps[1]); 121072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 121172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver = NULL; 121272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.dev.driver = NULL; 121372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 121472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 121572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 121672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 121772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 121872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic const struct usb_gadget_ops dwc3_gadget_ops = { 121972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .get_frame = dwc3_gadget_get_frame, 122072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .wakeup = dwc3_gadget_wakeup, 122172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .set_selfpowered = dwc3_gadget_set_selfpowered, 122272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .pullup = dwc3_gadget_pullup, 122372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .udc_start = dwc3_gadget_start, 122472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .udc_stop = dwc3_gadget_stop, 122572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi}; 122672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 122772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 122872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 122972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int __devinit dwc3_gadget_init_endpoints(struct dwc3 *dwc) 123072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 123172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 123272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 epnum; 123372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 123472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi INIT_LIST_HEAD(&dwc->gadget.ep_list); 123572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 123672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi for (epnum = 0; epnum < DWC3_ENDPOINTS_NUM; epnum++) { 123772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = kzalloc(sizeof(*dep), GFP_KERNEL); 123872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dep) { 123972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "can't allocate endpoint %d\n", 124072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi epnum); 124172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -ENOMEM; 124272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 124372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 124472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->dwc = dwc; 124572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->number = epnum; 124672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->eps[epnum] = dep; 124772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 124872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi snprintf(dep->name, sizeof(dep->name), "ep%d%s", epnum >> 1, 124972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi (epnum & 1) ? "in" : "out"); 125072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->endpoint.name = dep->name; 125172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->direction = (epnum & 1); 125272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 125372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (epnum == 0 || epnum == 1) { 125472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->endpoint.maxpacket = 512; 125572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->endpoint.ops = &dwc3_gadget_ep0_ops; 125672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!epnum) 125772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ep0 = &dep->endpoint; 125872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 125972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 126072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 126172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->endpoint.maxpacket = 1024; 126212d36c16bde3ee0643d705caa87723de536dbe49Sebastian Andrzej Siewior dep->endpoint.max_streams = 15; 126372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->endpoint.ops = &dwc3_gadget_ep_ops; 126472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_add_tail(&dep->endpoint.ep_list, 126572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi &dwc->gadget.ep_list); 126672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 126772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_alloc_trb_pool(dep); 126825b8ff68bf1d4954d4a9dcb4862c6b6a53cb09e2Felipe Balbi if (ret) 126972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 127072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 127125b8ff68bf1d4954d4a9dcb4862c6b6a53cb09e2Felipe Balbi 127272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi INIT_LIST_HEAD(&dep->request_list); 127372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi INIT_LIST_HEAD(&dep->req_queued); 127472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 127572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 127672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 127772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 127872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 127972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_free_endpoints(struct dwc3 *dwc) 128072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 128172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 128272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 epnum; 128372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 128472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi for (epnum = 0; epnum < DWC3_ENDPOINTS_NUM; epnum++) { 128572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[epnum]; 128672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_free_trb_pool(dep); 128772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 128872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (epnum != 0 && epnum != 1) 128972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_del(&dep->endpoint.ep_list); 129072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 129172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi kfree(dep); 129272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 129372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 129472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 129572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_release(struct device *dev) 129672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 129772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dev, "%s\n", __func__); 129872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 129972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 130072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 130172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_cleanup_done_reqs(struct dwc3 *dwc, struct dwc3_ep *dep, 130272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct dwc3_event_depevt *event, int status) 130372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 130472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req; 130572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_trb trb; 130672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned int count; 130772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned int s_pkt = 0; 130872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 130972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi do { 131072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req = next_request(&dep->req_queued); 1311d39ee7be2aaf0a53d7b5f43c13571bac95f7cc0cSebastian Andrzej Siewior if (!req) { 1312d39ee7be2aaf0a53d7b5f43c13571bac95f7cc0cSebastian Andrzej Siewior WARN_ON_ONCE(1); 1313d39ee7be2aaf0a53d7b5f43c13571bac95f7cc0cSebastian Andrzej Siewior return 1; 1314d39ee7be2aaf0a53d7b5f43c13571bac95f7cc0cSebastian Andrzej Siewior } 131572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 131672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_trb_to_nat(req->trb, &trb); 131772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 13180d2f4758530d1598087d1d2f3e75b4f7d17fc6c7Sebastian Andrzej Siewior if (trb.hwo && status != -ESHUTDOWN) 13190d2f4758530d1598087d1d2f3e75b4f7d17fc6c7Sebastian Andrzej Siewior /* 13200d2f4758530d1598087d1d2f3e75b4f7d17fc6c7Sebastian Andrzej Siewior * We continue despite the error. There is not much we 13210d2f4758530d1598087d1d2f3e75b4f7d17fc6c7Sebastian Andrzej Siewior * can do. If we don't clean in up we loop for ever. If 13220d2f4758530d1598087d1d2f3e75b4f7d17fc6c7Sebastian Andrzej Siewior * we skip the TRB than it gets overwritten reused after 13230d2f4758530d1598087d1d2f3e75b4f7d17fc6c7Sebastian Andrzej Siewior * a while since we use them in a ring buffer. a BUG() 13240d2f4758530d1598087d1d2f3e75b4f7d17fc6c7Sebastian Andrzej Siewior * would help. Lets hope that if this occures, someone 13250d2f4758530d1598087d1d2f3e75b4f7d17fc6c7Sebastian Andrzej Siewior * fixes the root cause instead of looking away :) 13260d2f4758530d1598087d1d2f3e75b4f7d17fc6c7Sebastian Andrzej Siewior */ 132772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "%s's TRB (%p) still owned by HW\n", 132872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name, req->trb); 132972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi count = trb.length; 133072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 133172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->direction) { 133272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (count) { 133372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "incomplete IN transfer %s\n", 133472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 133572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi status = -ECONNRESET; 133672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 133772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 133872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (count && (event->status & DEPEVT_STATUS_SHORT)) 133972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi s_pkt = 1; 134072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 134172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 134272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 134372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We assume here we will always receive the entire data block 134472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * which we should receive. Meaning, if we program RX to 134572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * receive 4K but we receive only 2K, we assume that's all we 134672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * should receive and we simply bounce the request back to the 134772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * gadget driver for further processing. 134872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 134972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.actual += req->request.length - count; 135072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_giveback(dep, req, status); 135172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (s_pkt) 135272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 135372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if ((event->status & DEPEVT_STATUS_LST) && trb.lst) 135472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 135572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if ((event->status & DEPEVT_STATUS_IOC) && trb.ioc) 135672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 135772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } while (1); 135872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 135972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if ((event->status & DEPEVT_STATUS_IOC) && trb.ioc) 136072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 136172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 1; 136272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 136372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 136472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_endpoint_transfer_complete(struct dwc3 *dwc, 136572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep, const struct dwc3_event_depevt *event, 136672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int start_new) 136772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 136872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned status = 0; 136972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int clean_busy; 137072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 137172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (event->status & DEPEVT_STATUS_BUSERR) 137272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi status = -ECONNRESET; 137372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 137472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi clean_busy = dwc3_cleanup_done_reqs(dwc, dep, event, status); 1375a1ae9be5fc137d7e911a77ef408273ff55a53a39Sebastian Andrzej Siewior if (clean_busy) { 137672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags &= ~DWC3_EP_BUSY; 1377a1ae9be5fc137d7e911a77ef408273ff55a53a39Sebastian Andrzej Siewior dep->res_trans_idx = 0; 1378a1ae9be5fc137d7e911a77ef408273ff55a53a39Sebastian Andrzej Siewior } 1379fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1380fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi /* 1381fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * WORKAROUND: This is the 2nd half of U1/U2 -> U0 workaround. 1382fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * See dwc3_gadget_linksts_change_interrupt() for 1st half. 1383fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi */ 1384fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi if (dwc->revision < DWC3_REVISION_183A) { 1385fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi u32 reg; 1386fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi int i; 1387fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1388fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi for (i = 0; i < DWC3_ENDPOINTS_NUM; i++) { 1389fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi struct dwc3_ep *dep = dwc->eps[i]; 1390fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1391fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) 1392fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi continue; 1393fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1394fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi if (!list_empty(&dep->req_queued)) 1395fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi return; 1396fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi } 1397fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1398fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 1399fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi reg |= dwc->u1u2; 1400fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 1401fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1402fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi dwc->u1u2 = 0; 1403fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi } 140472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 140572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 140672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_start_isoc(struct dwc3 *dwc, 140772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep, const struct dwc3_event_depevt *event) 140872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 140972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 uf; 141072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 141172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (list_empty(&dep->request_list)) { 141272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "ISOC ep %s run out for requests.\n", 141372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 141472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 141572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 141672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 141772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (event->parameters) { 141872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 mask; 141972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 142072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi mask = ~(dep->interval - 1); 142172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi uf = event->parameters & mask; 142272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 4 micro frames in the future */ 142372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi uf += dep->interval * 4; 142472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 142572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi uf = 0; 142672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 142772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 142872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi __dwc3_gadget_kick_transfer(dep, uf, 1); 142972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 143072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 143172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_process_ep_cmd_complete(struct dwc3_ep *dep, 143272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct dwc3_event_depevt *event) 143372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 143472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 143572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_event_depevt mod_ev = *event; 143672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 143772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 143872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We were asked to remove one requests. It is possible that this 143972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * request and a few other were started together and have the same 144072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * transfer index. Since we stopped the complete endpoint we don't 144172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * know how many requests were already completed (and not yet) 144272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * reported and how could be done (later). We purge them all until 144372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * the end of the list. 144472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 144572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi mod_ev.status = DEPEVT_STATUS_LST; 144672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_cleanup_done_reqs(dwc, dep, &mod_ev, -ESHUTDOWN); 144772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags &= ~DWC3_EP_BUSY; 144872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* pending requets are ignored and are queued on XferNotReady */ 144972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 145072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 145172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_ep_cmd_compl(struct dwc3_ep *dep, 145272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct dwc3_event_depevt *event) 145372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 145472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 param = event->parameters; 145572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 cmd_type = (param >> 8) & ((1 << 5) - 1); 145672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 145772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (cmd_type) { 145872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_ENDTRANSFER: 145972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_process_ep_cmd_complete(dep, event); 146072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 146172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_STARTTRANSFER: 146272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->res_trans_idx = param & 0x7f; 146372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 146472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 146572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi printk(KERN_ERR "%s() unknown /unexpected type: %d\n", 146672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi __func__, cmd_type); 146772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 146872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi }; 146972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 147072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 147172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_endpoint_interrupt(struct dwc3 *dwc, 147272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct dwc3_event_depevt *event) 147372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 147472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 147572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 epnum = event->endpoint_number; 147672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 147772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[epnum]; 147872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 147972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s: %s\n", dep->name, 148072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_ep_event_string(event->endpoint_event)); 148172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 148272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (epnum == 0 || epnum == 1) { 148372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_ep0_interrupt(dwc, event); 148472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 148572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 148672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 148772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (event->endpoint_event) { 148872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPEVT_XFERCOMPLETE: 148972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (usb_endpoint_xfer_isoc(dep->desc)) { 149072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "%s is an Isochronous endpoint\n", 149172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 149272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 149372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 149472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 149572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_endpoint_transfer_complete(dwc, dep, event, 1); 149672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 149772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPEVT_XFERINPROGRESS: 149872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!usb_endpoint_xfer_isoc(dep->desc)) { 149972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "%s is not an Isochronous endpoint\n", 150072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 150172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 150272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 150372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 150472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_endpoint_transfer_complete(dwc, dep, event, 0); 150572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 150672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPEVT_XFERNOTREADY: 150772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (usb_endpoint_xfer_isoc(dep->desc)) { 150872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_start_isoc(dwc, dep, event); 150972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 151072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 151172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 151272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s: reason %s\n", 151372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name, event->status 151472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ? "Transfer Active" 151572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi : "Transfer Not Active"); 151672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 151772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = __dwc3_gadget_kick_transfer(dep, 0, 1); 151872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!ret || ret == -EBUSY) 151972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 152072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 152172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "%s: failed to kick transfers\n", 152272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 152372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 152472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 152572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 1526879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi case DWC3_DEPEVT_STREAMEVT: 1527879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi if (!usb_endpoint_xfer_bulk(dep->desc)) { 1528879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dev_err(dwc->dev, "Stream event for non-Bulk %s\n", 1529879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dep->name); 1530879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi return; 1531879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi } 1532879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi 1533879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi switch (event->status) { 1534879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi case DEPEVT_STREAMEVT_FOUND: 1535879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dev_vdbg(dwc->dev, "Stream %d found and started\n", 1536879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi event->parameters); 1537879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi 1538879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi break; 1539879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi case DEPEVT_STREAMEVT_NOTFOUND: 1540879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi /* FALLTHROUGH */ 1541879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi default: 1542879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dev_dbg(dwc->dev, "Couldn't find suitable stream\n"); 1543879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi } 1544879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi break; 154572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPEVT_RXTXFIFOEVT: 154672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "%s FIFO Overrun\n", dep->name); 154772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 154872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPEVT_EPCMDCMPLT: 154972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_ep_cmd_compl(dep, event); 155072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 155172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 155272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 155372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 155472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_disconnect_gadget(struct dwc3 *dwc) 155572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 155672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dwc->gadget_driver && dwc->gadget_driver->disconnect) { 155772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock(&dwc->lock); 155872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver->disconnect(&dwc->gadget); 155972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock(&dwc->lock); 156072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 156172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 156272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 156372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_stop_active_transfer(struct dwc3 *dwc, u32 epnum) 156472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 156572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 156672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 156772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 cmd; 156872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 156972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 157072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[epnum]; 157172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1572624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior WARN_ON(!dep->res_trans_idx); 157372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->res_trans_idx) { 157472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd = DWC3_DEPCMD_ENDTRANSFER; 157572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd |= DWC3_DEPCMD_HIPRI_FORCERM | DWC3_DEPCMD_CMDIOC; 157672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd |= DWC3_DEPCMD_PARAM(dep->res_trans_idx); 157772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0, sizeof(params)); 157872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, cmd, ¶ms); 157972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi WARN_ON_ONCE(ret); 1580a1ae9be5fc137d7e911a77ef408273ff55a53a39Sebastian Andrzej Siewior dep->res_trans_idx = 0; 158172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 158272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 158372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 158472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_stop_active_transfers(struct dwc3 *dwc) 158572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 158672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 epnum; 158772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 158872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi for (epnum = 2; epnum < DWC3_ENDPOINTS_NUM; epnum++) { 158972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 159072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 159172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[epnum]; 159272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) 159372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi continue; 159472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1595624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior dwc3_remove_requests(dwc, dep); 159672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 159772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 159872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 159972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_clear_stall_all_ep(struct dwc3 *dwc) 160072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 160172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 epnum; 160272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 160372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi for (epnum = 1; epnum < DWC3_ENDPOINTS_NUM; epnum++) { 160472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 160572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 160672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 160772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 160872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[epnum]; 160972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 161072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(dep->flags & DWC3_EP_STALL)) 161172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi continue; 161272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 161372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags &= ~DWC3_EP_STALL; 161472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 161572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0, sizeof(params)); 161672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, 161772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEPCMD_CLEARSTALL, ¶ms); 161872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi WARN_ON_ONCE(ret); 161972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 162072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 162172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 162272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_disconnect_interrupt(struct dwc3 *dwc) 162372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 162472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s\n", __func__); 162572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#if 0 162672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi XXX 162772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi U1/U2 is powersave optimization. Skip it for now. Anyway we need to 162872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi enable it before we can disable it. 162972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 163072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 163172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DCTL_INITU1ENA; 163272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 163372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 163472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DCTL_INITU2ENA; 163572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 163672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#endif 163772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 163872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_stop_active_transfers(dwc); 163972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_disconnect_gadget(dwc); 1640b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman dwc->start_config_issued = false; 164172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 164272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_UNKNOWN; 164372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 164472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 164572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_usb3_phy_power(struct dwc3 *dwc, int on) 164672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 164772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 164872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 164972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(0)); 165072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 165172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (on) 165272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_GUSB3PIPECTL_SUSPHY; 165372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi else 165472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg |= DWC3_GUSB3PIPECTL_SUSPHY; 165572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 165672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg); 165772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 165872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 165972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_usb2_phy_power(struct dwc3 *dwc, int on) 166072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 166172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 166272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 166372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0)); 166472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 166572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (on) 166672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_GUSB2PHYCFG_SUSPHY; 166772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi else 166872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg |= DWC3_GUSB2PHYCFG_SUSPHY; 166972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 167072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg); 167172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 167272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 167372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_reset_interrupt(struct dwc3 *dwc) 167472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 167572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 167672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 167772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s\n", __func__); 167872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 167972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* Enable PHYs */ 168072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_usb2_phy_power(dwc, true); 168172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_usb3_phy_power(dwc, true); 168272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 168372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dwc->gadget.speed != USB_SPEED_UNKNOWN) 168472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_disconnect_gadget(dwc); 168572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 168672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 168772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DCTL_TSTCTRL_MASK; 168872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 168972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 169072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_stop_active_transfers(dwc); 169172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_clear_stall_all_ep(dwc); 1692b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman dwc->start_config_issued = false; 169372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 169472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* Reset device address to zero */ 169572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCFG); 169672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~(DWC3_DCFG_DEVADDR_MASK); 169772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCFG, reg); 169872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 169972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 170072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_update_ram_clk_sel(struct dwc3 *dwc, u32 speed) 170172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 170272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 170372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 usb30_clock = DWC3_GCTL_CLK_BUS; 170472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 170572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 170672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We change the clock only at SS but I dunno why I would want to do 170772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * this. Maybe it becomes part of the power saving plan. 170872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 170972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 171072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (speed != DWC3_DSTS_SUPERSPEED) 171172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 171272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 171372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 171472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * RAMClkSel is reset to 0 after USB reset, so it must be reprogrammed 171572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * each time on Connect Done. 171672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 171772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!usb30_clock) 171872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 171972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 172072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_GCTL); 172172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg |= DWC3_GCTL_RAMCLKSEL(usb30_clock); 172272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_GCTL, reg); 172372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 172472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 172572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_disable_phy(struct dwc3 *dwc, u8 speed) 172672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 172772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (speed) { 172872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_SPEED_SUPER: 172972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_usb2_phy_power(dwc, false); 173072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 173172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_SPEED_HIGH: 173272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_SPEED_FULL: 173372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_SPEED_LOW: 173472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_usb3_phy_power(dwc, false); 173572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 173672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 173772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 173872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 173972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_conndone_interrupt(struct dwc3 *dwc) 174072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 174172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 174272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 174372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 174472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 174572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 speed; 174672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 174772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s\n", __func__); 174872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 174972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0x00, sizeof(params)); 175072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 175172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 175272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi speed = reg & DWC3_DSTS_CONNECTSPD; 175372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->speed = speed; 175472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 175572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_update_ram_clk_sel(dwc, speed); 175672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 175772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (speed) { 175872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DCFG_SUPERSPEED: 175972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(512); 176072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ep0->maxpacket = 512; 176172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_SUPER; 176272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 176372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DCFG_HIGHSPEED: 176472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(64); 176572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ep0->maxpacket = 64; 176672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_HIGH; 176772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 176872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DCFG_FULLSPEED2: 176972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DCFG_FULLSPEED1: 177072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(64); 177172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ep0->maxpacket = 64; 177272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_FULL; 177372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 177472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DCFG_LOWSPEED: 177572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(8); 177672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ep0->maxpacket = 8; 177772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_LOW; 177872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 177972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 178072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 178172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* Disable unneded PHY */ 178272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_disable_phy(dwc, dwc->gadget.speed); 178372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 178472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[0]; 178572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc); 178672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 178772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to enable %s\n", dep->name); 178872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 178972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 179072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 179172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[1]; 179272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc); 179372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 179472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to enable %s\n", dep->name); 179572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 179672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 179772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 179872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 179972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Configure PHY via GUSB3PIPECTLn if required. 180072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 180172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Update GTXFIFOSIZn 180272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 180372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * In both cases reset values should be sufficient. 180472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 180572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 180672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 180772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_wakeup_interrupt(struct dwc3 *dwc) 180872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 180972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s\n", __func__); 181072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 181172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 181272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * TODO take core out of low power mode when that's 181372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * implemented. 181472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 181572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 181672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver->resume(&dwc->gadget); 181772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 181872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 181972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_linksts_change_interrupt(struct dwc3 *dwc, 182072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned int evtinfo) 182172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 1822fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi enum dwc3_link_state next = evtinfo & DWC3_LINK_STATE_MASK; 1823fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1824fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi /* 1825fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * WORKAROUND: DWC3 Revisions <1.83a have an issue which, depending 1826fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * on the link partner, the USB session might do multiple entry/exit 1827fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * of low power states before a transfer takes place. 1828fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * 1829fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * Due to this problem, we might experience lower throughput. The 1830fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * suggested workaround is to disable DCTL[12:9] bits if we're 1831fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * transitioning from U1/U2 to U0 and enable those bits again 1832fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * after a transfer completes and there are no pending transfers 1833fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * on any of the enabled endpoints. 1834fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * 1835fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * This is the first half of that workaround. 1836fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * 1837fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * Refers to: 1838fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * 1839fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * STAR#9000446952: RTL: Device SS : if U1/U2 ->U0 takes >128us 1840fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi * core send LGO_Ux entering U0 1841fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi */ 1842fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi if (dwc->revision < DWC3_REVISION_183A) { 1843fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi if (next == DWC3_LINK_STATE_U0) { 1844fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi u32 u1u2; 1845fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi u32 reg; 1846fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1847fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi switch (dwc->link_state) { 1848fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi case DWC3_LINK_STATE_U1: 1849fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi case DWC3_LINK_STATE_U2: 1850fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 1851fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi u1u2 = reg & (DWC3_DCTL_INITU2ENA 1852fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi | DWC3_DCTL_ACCEPTU2ENA 1853fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi | DWC3_DCTL_INITU1ENA 1854fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi | DWC3_DCTL_ACCEPTU1ENA); 1855fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1856fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi if (!dwc->u1u2) 1857fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi dwc->u1u2 = reg & u1u2; 1858fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1859fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi reg &= ~u1u2; 1860fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1861fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 1862fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi break; 1863fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi default: 1864fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi /* do nothing */ 1865fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi break; 1866fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi } 1867fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi } 1868fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi } 1869fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi 1870fae2b904aa85beecd0950026de28921ae65fb3daFelipe Balbi dwc->link_state = next; 1871019ac83252dc2b356cb0ca81c25a077ec90309e7Felipe Balbi 1872019ac83252dc2b356cb0ca81c25a077ec90309e7Felipe Balbi dev_vdbg(dwc->dev, "%s link %d\n", __func__, dwc->link_state); 187372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 187472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 187572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_interrupt(struct dwc3 *dwc, 187672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct dwc3_event_devt *event) 187772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 187872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (event->type) { 187972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_DISCONNECT: 188072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_disconnect_interrupt(dwc); 188172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 188272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_RESET: 188372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_reset_interrupt(dwc); 188472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 188572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_CONNECT_DONE: 188672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_conndone_interrupt(dwc); 188772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 188872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_WAKEUP: 188972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_wakeup_interrupt(dwc); 189072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 189172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_LINK_STATUS_CHANGE: 189272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_linksts_change_interrupt(dwc, event->event_info); 189372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 189472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_EOPF: 189572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "End of Periodic Frame\n"); 189672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 189772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_SOF: 189872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "Start of Periodic Frame\n"); 189972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 190072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_ERRATIC_ERROR: 190172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "Erratic Error\n"); 190272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 190372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_CMD_CMPL: 190472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "Command Complete\n"); 190572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 190672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_OVERFLOW: 190772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "Overflow\n"); 190872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 190972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 191072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "UNKNOWN IRQ %d\n", event->type); 191172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 191272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 191372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 191472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_process_event_entry(struct dwc3 *dwc, 191572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const union dwc3_event *event) 191672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 191772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* Endpoint IRQ, handle it and return early */ 191872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (event->type.is_devspec == 0) { 191972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* depevt */ 192072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return dwc3_endpoint_interrupt(dwc, &event->depevt); 192172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 192272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 192372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (event->type.type) { 192472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_EVENT_TYPE_DEV: 192572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_interrupt(dwc, &event->devt); 192672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 192772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* REVISIT what to do with Carkit and I2C events ? */ 192872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 192972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "UNKNOWN IRQ type %d\n", event->raw); 193072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 193172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 193272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 193372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic irqreturn_t dwc3_process_event_buf(struct dwc3 *dwc, u32 buf) 193472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 193572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_event_buffer *evt; 193672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int left; 193772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 count; 193872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 193972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi count = dwc3_readl(dwc->regs, DWC3_GEVNTCOUNT(buf)); 194072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi count &= DWC3_GEVNTCOUNT_MASK; 194172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!count) 194272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return IRQ_NONE; 194372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 194472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi evt = dwc->ev_buffs[buf]; 194572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi left = count; 194672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 194772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi while (left > 0) { 194872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi union dwc3_event event; 194972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 195072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memcpy(&event.raw, (evt->buf + evt->lpos), sizeof(event.raw)); 195172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_process_event_entry(dwc, &event); 195272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 195372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * XXX we wrap around correctly to the next entry as almost all 195472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * entries are 4 bytes in size. There is one entry which has 12 195572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * bytes which is a regular entry followed by 8 bytes data. ATM 195672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * I don't know how things are organized if were get next to the 195772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * a boundary so I worry about that once we try to handle that. 195872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 195972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi evt->lpos = (evt->lpos + 4) % DWC3_EVENT_BUFFERS_SIZE; 196072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi left -= 4; 196172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 196272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_GEVNTCOUNT(buf), 4); 196372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 196472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 196572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return IRQ_HANDLED; 196672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 196772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 196872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic irqreturn_t dwc3_interrupt(int irq, void *_dwc) 196972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 197072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = _dwc; 197172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int i; 197272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi irqreturn_t ret = IRQ_NONE; 197372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 197472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock(&dwc->lock); 197572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 19769f622b2a407d8b34a5a7f5b4abd8b29b25cf4f32Felipe Balbi for (i = 0; i < dwc->num_event_buffers; i++) { 197772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi irqreturn_t status; 197872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 197972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi status = dwc3_process_event_buf(dwc, i); 198072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (status == IRQ_HANDLED) 198172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = status; 198272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 198372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 198472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock(&dwc->lock); 198572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 198672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 198772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 198872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 198972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/** 199072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * dwc3_gadget_init - Initializes gadget related registers 199172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * @dwc: Pointer to out controller context structure 199272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 199372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Returns 0 on success otherwise negative errno. 199472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 199572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiint __devinit dwc3_gadget_init(struct dwc3 *dwc) 199672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 199772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 199872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 199972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int irq; 200072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 200172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ctrl_req = dma_alloc_coherent(dwc->dev, sizeof(*dwc->ctrl_req), 200272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi &dwc->ctrl_req_addr, GFP_KERNEL); 200372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dwc->ctrl_req) { 200472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to allocate ctrl request\n"); 200572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -ENOMEM; 200672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto err0; 200772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 200872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 200972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ep0_trb = dma_alloc_coherent(dwc->dev, sizeof(*dwc->ep0_trb), 201072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi &dwc->ep0_trb_addr, GFP_KERNEL); 201172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dwc->ep0_trb) { 201272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to allocate ep0 trb\n"); 201372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -ENOMEM; 201472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto err1; 201572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 201672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 201772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->setup_buf = dma_alloc_coherent(dwc->dev, 201872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi sizeof(*dwc->setup_buf) * 2, 201972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi &dwc->setup_buf_addr, GFP_KERNEL); 202072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dwc->setup_buf) { 202172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to allocate setup buffer\n"); 202272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -ENOMEM; 202372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto err2; 202472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 202572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 20265812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi dwc->ep0_bounce = dma_alloc_coherent(dwc->dev, 20275812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi 512, &dwc->ep0_bounce_addr, GFP_KERNEL); 20285812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi if (!dwc->ep0_bounce) { 20295812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi dev_err(dwc->dev, "failed to allocate ep0 bounce buffer\n"); 20305812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi ret = -ENOMEM; 20315812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi goto err3; 20325812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi } 20335812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi 203472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_set_name(&dwc->gadget.dev, "gadget"); 203572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 203672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ops = &dwc3_gadget_ops; 203772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.is_dualspeed = true; 203872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_UNKNOWN; 203972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.dev.parent = dwc->dev; 204072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 204172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_set_coherent_mask(&dwc->gadget.dev, dwc->dev->coherent_dma_mask); 204272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 204372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.dev.dma_parms = dwc->dev->dma_parms; 204472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.dev.dma_mask = dwc->dev->dma_mask; 204572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.dev.release = dwc3_gadget_release; 204672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.name = "dwc3-gadget"; 204772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 204872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 204972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * REVISIT: Here we should clear all pending IRQs to be 205072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * sure we're starting from a well known location. 205172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 205272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 205372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_gadget_init_endpoints(dwc); 205472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 20555812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi goto err4; 205672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 205772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi irq = platform_get_irq(to_platform_device(dwc->dev), 0); 205872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 205972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = request_irq(irq, dwc3_interrupt, IRQF_SHARED, 206072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi "dwc3", dwc); 206172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 206272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to request irq #%d --> %d\n", 206372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi irq, ret); 20645812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi goto err5; 206572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 206672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 206772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* Enable all but Start and End of Frame IRQs */ 206872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = (DWC3_DEVTEN_VNDRDEVTSTRCVEDEN | 206972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEVTEN_EVNTOVERFLOWEN | 207072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEVTEN_CMDCMPLTEN | 207172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEVTEN_ERRTICERREN | 207272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEVTEN_WKUPEVTEN | 207372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEVTEN_ULSTCNGEN | 207472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEVTEN_CONNECTDONEEN | 207572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEVTEN_USBRSTEN | 207672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEVTEN_DISCONNEVTEN); 207772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEVTEN, reg); 207872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 207972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = device_register(&dwc->gadget.dev); 208072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 208172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to register gadget device\n"); 208272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi put_device(&dwc->gadget.dev); 20835812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi goto err6; 208472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 208572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 208672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = usb_add_gadget_udc(dwc->dev, &dwc->gadget); 208772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 208872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to register udc\n"); 20895812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi goto err7; 209072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 209172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 209272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 209372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 20945812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbierr7: 209572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi device_unregister(&dwc->gadget.dev); 209672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 20975812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbierr6: 209872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEVTEN, 0x00); 209972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi free_irq(irq, dwc); 210072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 21015812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbierr5: 210272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_free_endpoints(dwc); 210372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 21045812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbierr4: 21055812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi dma_free_coherent(dwc->dev, 512, dwc->ep0_bounce, 21065812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi dwc->ep0_bounce_addr); 21075812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi 210872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbierr3: 210972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(*dwc->setup_buf) * 2, 211072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->setup_buf, dwc->setup_buf_addr); 211172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 211272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbierr2: 211372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(*dwc->ep0_trb), 211472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ep0_trb, dwc->ep0_trb_addr); 211572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 211672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbierr1: 211772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(*dwc->ctrl_req), 211872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ctrl_req, dwc->ctrl_req_addr); 211972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 212072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbierr0: 212172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 212272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 212372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 212472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbivoid dwc3_gadget_exit(struct dwc3 *dwc) 212572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 212672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int irq; 212772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 212872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi usb_del_gadget_udc(&dwc->gadget); 212972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi irq = platform_get_irq(to_platform_device(dwc->dev), 0); 213072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 213172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEVTEN, 0x00); 213272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi free_irq(irq, dwc); 213372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 213472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_free_endpoints(dwc); 213572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 21365812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi dma_free_coherent(dwc->dev, 512, dwc->ep0_bounce, 21375812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi dwc->ep0_bounce_addr); 21385812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi 213972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(*dwc->setup_buf) * 2, 214072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->setup_buf, dwc->setup_buf_addr); 214172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 214272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(*dwc->ep0_trb), 214372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ep0_trb, dwc->ep0_trb_addr); 214472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 214572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(*dwc->ctrl_req), 214672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ctrl_req, dwc->ctrl_req_addr); 214772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 214872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi device_unregister(&dwc->gadget.dev); 214972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 2150