gadget.c revision eeb720fb21d61dfc3aac780e721150998ef603af
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 68eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (req->request.num_sgs) { 69eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi int mapped; 70eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi 71eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi mapped = dma_map_sg(dwc->dev, req->request.sg, 72eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi req->request.num_sgs, 73eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi req->direction ? DMA_TO_DEVICE 74eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi : DMA_FROM_DEVICE); 75eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (mapped < 0) { 76eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dev_err(dwc->dev, "failed to map SGs\n"); 77eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi return; 78eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi } 79eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi 80eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi req->request.num_mapped_sgs = mapped; 81eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi return; 82eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi } 83eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi 8472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (req->request.dma == DMA_ADDR_INVALID) { 8572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.dma = dma_map_single(dwc->dev, req->request.buf, 8672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.length, req->direction 8772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ? DMA_TO_DEVICE : DMA_FROM_DEVICE); 8872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->mapped = true; 8972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 9072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 9172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 9272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbivoid dwc3_unmap_buffer_from_dma(struct dwc3_request *req) 9372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 9472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = req->dep->dwc; 9572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 9678c58a53c9864447f2a46d4c06dd3c2616823ad2Sebastian Andrzej Siewior if (req->request.length == 0) { 9778c58a53c9864447f2a46d4c06dd3c2616823ad2Sebastian Andrzej Siewior req->request.dma = DMA_ADDR_INVALID; 9878c58a53c9864447f2a46d4c06dd3c2616823ad2Sebastian Andrzej Siewior return; 9978c58a53c9864447f2a46d4c06dd3c2616823ad2Sebastian Andrzej Siewior } 10078c58a53c9864447f2a46d4c06dd3c2616823ad2Sebastian Andrzej Siewior 101eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (req->request.num_mapped_sgs) { 102eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi req->request.dma = DMA_ADDR_INVALID; 103eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dma_unmap_sg(dwc->dev, req->request.sg, 104eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi req->request.num_sgs, 105eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi req->direction ? DMA_TO_DEVICE 106eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi : DMA_FROM_DEVICE); 107eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi 108eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi req->request.num_mapped_sgs = 0; 109eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi return; 110eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi } 111eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi 11272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (req->mapped) { 11372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_unmap_single(dwc->dev, req->request.dma, 11472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.length, req->direction 11572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ? DMA_TO_DEVICE : DMA_FROM_DEVICE); 11672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->mapped = 0; 117f198ead21bcb7b03d7bb2cba7ba0f5ad615a3862Felipe Balbi req->request.dma = DMA_ADDR_INVALID; 11872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 11972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 12072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 12172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbivoid dwc3_gadget_giveback(struct dwc3_ep *dep, struct dwc3_request *req, 12272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int status) 12372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 12472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 12572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 12672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (req->queued) { 127eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (req->request.num_mapped_sgs) 128eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dep->busy_slot += req->request.num_mapped_sgs; 129eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi else 130eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dep->busy_slot++; 131eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi 13272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 13372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Skip LINK TRB. We can't use req->trb and check for 13472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * DWC3_TRBCTL_LINK_TRB because it points the TRB we just 13572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * completed (not the LINK TRB). 13672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 13772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (((dep->busy_slot & DWC3_TRB_MASK) == DWC3_TRB_NUM - 1) && 13872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi usb_endpoint_xfer_isoc(dep->desc)) 13972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->busy_slot++; 14072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 14172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_del(&req->list); 142eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi req->trb = NULL; 14372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 14472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (req->request.status == -EINPROGRESS) 14572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.status = status; 14672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 14772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_unmap_buffer_from_dma(req); 14872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 14972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "request %p from %s completed %d/%d ===> %d\n", 15072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req, dep->name, req->request.actual, 15172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.length, status); 15272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 15372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock(&dwc->lock); 15472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.complete(&req->dep->endpoint, &req->request); 15572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock(&dwc->lock); 15672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 15772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 15872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic const char *dwc3_gadget_ep_cmd_string(u8 cmd) 15972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 16072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (cmd) { 16172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_DEPSTARTCFG: 16272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Start New Configuration"; 16372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_ENDTRANSFER: 16472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "End Transfer"; 16572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_UPDATETRANSFER: 16672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Update Transfer"; 16772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_STARTTRANSFER: 16872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Start Transfer"; 16972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_CLEARSTALL: 17072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Clear Stall"; 17172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_SETSTALL: 17272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Set Stall"; 17372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_GETSEQNUMBER: 17472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Get Data Sequence Number"; 17572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_SETTRANSFRESOURCE: 17672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Set Endpoint Transfer Resource"; 17772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_SETEPCONFIG: 17872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "Set Endpoint Configuration"; 17972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 18072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return "UNKNOWN command"; 18172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 18272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 18372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 18472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiint dwc3_send_gadget_ep_cmd(struct dwc3 *dwc, unsigned ep, 18572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned cmd, struct dwc3_gadget_ep_cmd_params *params) 18672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 18772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = dwc->eps[ep]; 18861d58242f634642de42d6a4098913b7254a65053Sebastian Andrzej Siewior u32 timeout = 500; 18972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 19072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 19172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s: cmd '%s' params %08x %08x %08x\n", 19272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name, 193dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi dwc3_gadget_ep_cmd_string(cmd), params->param0, 194dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params->param1, params->param2); 19572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 196dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEPCMDPAR0(ep), params->param0); 197dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEPCMDPAR1(ep), params->param1); 198dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEPCMDPAR2(ep), params->param2); 19972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 20072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEPCMD(ep), cmd | DWC3_DEPCMD_CMDACT); 20172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi do { 20272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DEPCMD(ep)); 20372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(reg & DWC3_DEPCMD_CMDACT)) { 204164f6e141ed214bda30fb219d41ec3254bd90886Felipe Balbi dev_vdbg(dwc->dev, "Command Complete --> %d\n", 205164f6e141ed214bda30fb219d41ec3254bd90886Felipe Balbi DWC3_DEPCMD_STATUS(reg)); 20672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 20772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 20872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 20972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 21072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We can't sleep here, because it is also called from 21172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * interrupt context. 21272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 21372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi timeout--; 21472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!timeout) 21572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -ETIMEDOUT; 21672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 21761d58242f634642de42d6a4098913b7254a65053Sebastian Andrzej Siewior udelay(1); 21872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } while (1); 21972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 22072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 22172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic dma_addr_t dwc3_trb_dma_offset(struct dwc3_ep *dep, 22272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_trb_hw *trb) 22372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 224c439ef87c33a1df30f528cb152151465c2529cacPaul Zimmerman u32 offset = (char *) trb - (char *) dep->trb_pool; 22572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 22672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return dep->trb_pool_dma + offset; 22772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 22872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 22972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_alloc_trb_pool(struct dwc3_ep *dep) 23072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 23172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 23272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 23372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->trb_pool) 23472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 23572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 23672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->number == 0 || dep->number == 1) 23772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 23872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 23972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->trb_pool = dma_alloc_coherent(dwc->dev, 24072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi sizeof(struct dwc3_trb) * DWC3_TRB_NUM, 24172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi &dep->trb_pool_dma, GFP_KERNEL); 24272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dep->trb_pool) { 24372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dep->dwc->dev, "failed to allocate trb pool for %s\n", 24472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 24572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -ENOMEM; 24672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 24772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 24872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 24972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 25072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 25172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_free_trb_pool(struct dwc3_ep *dep) 25272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 25372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 25472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 25572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(struct dwc3_trb) * DWC3_TRB_NUM, 25672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->trb_pool, dep->trb_pool_dma); 25772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 25872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->trb_pool = NULL; 25972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->trb_pool_dma = 0; 26072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 26172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 26272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_start_config(struct dwc3 *dwc, struct dwc3_ep *dep) 26372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 26472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 26572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 cmd; 26672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 26772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0x00, sizeof(params)); 26872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 26972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->number != 1) { 27072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd = DWC3_DEPCMD_DEPSTARTCFG; 27172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* XferRscIdx == 0 for ep0 and 2 for the remaining */ 272b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman if (dep->number > 1) { 273b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman if (dwc->start_config_issued) 274b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman return 0; 275b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman dwc->start_config_issued = true; 27672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd |= DWC3_DEPCMD_PARAM(2); 277b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman } 27872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 27972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return dwc3_send_gadget_ep_cmd(dwc, 0, cmd, ¶ms); 28072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 28172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 28272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 28372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 28472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 28572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_set_ep_config(struct dwc3 *dwc, struct dwc3_ep *dep, 28672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct usb_endpoint_descriptor *desc) 28772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 28872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 28972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 29072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0x00, sizeof(params)); 29172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 292dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param0 = DWC3_DEPCFG_EP_TYPE(usb_endpoint_type(desc)) 293dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi | DWC3_DEPCFG_MAX_PACKET_SIZE(usb_endpoint_maxp(desc)) 294dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi | DWC3_DEPCFG_BURST_SIZE(dep->endpoint.maxburst); 29572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 296dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param1 = DWC3_DEPCFG_XFER_COMPLETE_EN 297dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi | DWC3_DEPCFG_XFER_NOT_READY_EN; 29872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 299879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi if (usb_endpoint_xfer_bulk(desc) && dep->endpoint.max_streams) { 300dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param1 |= DWC3_DEPCFG_STREAM_CAPABLE 301dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi | DWC3_DEPCFG_STREAM_EVENT_EN; 302879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dep->stream_capable = true; 303879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi } 304879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi 30572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (usb_endpoint_xfer_isoc(desc)) 306dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param1 |= DWC3_DEPCFG_XFER_IN_PROGRESS_EN; 30772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 30872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 30972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We are doing 1:1 mapping for endpoints, meaning 31072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Physical Endpoints 2 maps to Logical Endpoint 2 and 31172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * so on. We consider the direction bit as part of the physical 31272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * endpoint number. So USB endpoint 0x81 is 0x03. 31372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 314dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param1 |= DWC3_DEPCFG_EP_NUMBER(dep->number); 31572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 31672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 31772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We must use the lower 16 TX FIFOs even though 31872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * HW might have more 31972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 32072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->direction) 321dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param0 |= DWC3_DEPCFG_FIFO_NUMBER(dep->number >> 1); 32272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 32372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (desc->bInterval) { 324dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param1 |= DWC3_DEPCFG_BINTERVAL_M1(desc->bInterval - 1); 32572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->interval = 1 << (desc->bInterval - 1); 32672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 32772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 32872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return dwc3_send_gadget_ep_cmd(dwc, dep->number, 32972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEPCMD_SETEPCONFIG, ¶ms); 33072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 33172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 33272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_set_xfer_resource(struct dwc3 *dwc, struct dwc3_ep *dep) 33372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 33472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 33572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 33672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0x00, sizeof(params)); 33772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 338dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param0 = DWC3_DEPXFERCFG_NUM_XFER_RES(1); 33972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 34072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return dwc3_send_gadget_ep_cmd(dwc, dep->number, 34172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEPCMD_SETTRANSFRESOURCE, ¶ms); 34272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 34372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 34472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/** 34572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * __dwc3_gadget_ep_enable - Initializes a HW endpoint 34672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * @dep: endpoint to be initialized 34772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * @desc: USB Endpoint Descriptor 34872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 34972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Caller should take care of locking 35072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 35172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int __dwc3_gadget_ep_enable(struct dwc3_ep *dep, 35272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct usb_endpoint_descriptor *desc) 35372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 35472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 35572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 35672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret = -ENOMEM; 35772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 35872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) { 35972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_gadget_start_config(dwc, dep); 36072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 36172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 36272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 36372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 36472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_gadget_set_ep_config(dwc, dep, desc); 36572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 36672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 36772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 36872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) { 36972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_trb_hw *trb_st_hw; 37072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_trb_hw *trb_link_hw; 37172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_trb trb_link; 37272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 37372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_gadget_set_xfer_resource(dwc, dep); 37472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 37572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 37672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 37772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->desc = desc; 37872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->type = usb_endpoint_type(desc); 37972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags |= DWC3_EP_ENABLED; 38072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 38172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DALEPENA); 38272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg |= DWC3_DALEPENA_EP(dep->number); 38372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DALEPENA, reg); 38472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 38572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!usb_endpoint_xfer_isoc(desc)) 38672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 38772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 38872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(&trb_link, 0, sizeof(trb_link)); 38972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 39072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* Link TRB for ISOC. The HWO but is never reset */ 39172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trb_st_hw = &dep->trb_pool[0]; 39272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 39372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trb_link.bplh = dwc3_trb_dma_offset(dep, trb_st_hw); 39472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trb_link.trbctl = DWC3_TRBCTL_LINK_TRB; 39572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trb_link.hwo = true; 39672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 39772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trb_link_hw = &dep->trb_pool[DWC3_TRB_NUM - 1]; 39872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_trb_to_hw(&trb_link, trb_link_hw); 39972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 40072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 40172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 40272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 40372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 404624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewiorstatic void dwc3_stop_active_transfer(struct dwc3 *dwc, u32 epnum); 405624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewiorstatic void dwc3_remove_requests(struct dwc3 *dwc, struct dwc3_ep *dep) 40672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 40772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req; 40872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 409624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior if (!list_empty(&dep->req_queued)) 410624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior dwc3_stop_active_transfer(dwc, dep->number); 411624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior 41272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi while (!list_empty(&dep->request_list)) { 41372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req = next_request(&dep->request_list); 41472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 415624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior dwc3_gadget_giveback(dep, req, -ESHUTDOWN); 41672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 41772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 41872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 41972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/** 42072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * __dwc3_gadget_ep_disable - Disables a HW endpoint 42172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * @dep: the endpoint to disable 42272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 423624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior * This function also removes requests which are currently processed ny the 424624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior * hardware and those which are not yet scheduled. 425624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior * Caller should take care of locking. 42672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 42772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int __dwc3_gadget_ep_disable(struct dwc3_ep *dep) 42872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 42972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 43072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 43172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 432624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior dwc3_remove_requests(dwc, dep); 43372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 43472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DALEPENA); 43572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DALEPENA_EP(dep->number); 43672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DALEPENA, reg); 43772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 438879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dep->stream_capable = false; 43972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->desc = NULL; 44072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->type = 0; 441879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dep->flags = 0; 44272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 44372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 44472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 44572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 44672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 44772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 44872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep0_enable(struct usb_ep *ep, 44972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct usb_endpoint_descriptor *desc) 45072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 45172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EINVAL; 45272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 45372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 45472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep0_disable(struct usb_ep *ep) 45572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 45672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EINVAL; 45772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 45872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 45972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 46072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 46172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_enable(struct usb_ep *ep, 46272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct usb_endpoint_descriptor *desc) 46372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 46472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 46572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc; 46672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 46772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 46872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 46972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!ep || !desc || desc->bDescriptorType != USB_DT_ENDPOINT) { 47072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi pr_debug("dwc3: invalid parameters\n"); 47172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EINVAL; 47272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 47372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 47472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!desc->wMaxPacketSize) { 47572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi pr_debug("dwc3: missing wMaxPacketSize\n"); 47672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EINVAL; 47772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 47872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 47972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = to_dwc3_ep(ep); 48072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc = dep->dwc; 48172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 48272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (usb_endpoint_type(desc)) { 48372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_ENDPOINT_XFER_CONTROL: 48472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi strncat(dep->name, "-control", sizeof(dep->name)); 48572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 48672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_ENDPOINT_XFER_ISOC: 48772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi strncat(dep->name, "-isoc", sizeof(dep->name)); 48872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 48972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_ENDPOINT_XFER_BULK: 49072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi strncat(dep->name, "-bulk", sizeof(dep->name)); 49172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 49272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_ENDPOINT_XFER_INT: 49372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi strncat(dep->name, "-int", sizeof(dep->name)); 49472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 49572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 49672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "invalid endpoint transfer type\n"); 49772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 49872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 49972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->flags & DWC3_EP_ENABLED) { 50072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_WARN_ONCE(dwc->dev, true, "%s is already enabled\n", 50172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 50272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 50372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 50472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 50572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "Enabling %s\n", dep->name); 50672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 50772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 50872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = __dwc3_gadget_ep_enable(dep, desc); 50972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 51072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 51172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 51272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 51372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 51472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_disable(struct usb_ep *ep) 51572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 51672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 51772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc; 51872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 51972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 52072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 52172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!ep) { 52272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi pr_debug("dwc3: invalid parameters\n"); 52372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EINVAL; 52472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 52572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 52672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = to_dwc3_ep(ep); 52772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc = dep->dwc; 52872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 52972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) { 53072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_WARN_ONCE(dwc->dev, true, "%s is already disabled\n", 53172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 53272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 53372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 53472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 53572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi snprintf(dep->name, sizeof(dep->name), "ep%d%s", 53672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->number >> 1, 53772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi (dep->number & 1) ? "in" : "out"); 53872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 53972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 54072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = __dwc3_gadget_ep_disable(dep); 54172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 54272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 54372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 54472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 54572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 54672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic struct usb_request *dwc3_gadget_ep_alloc_request(struct usb_ep *ep, 54772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi gfp_t gfp_flags) 54872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 54972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req; 55072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = to_dwc3_ep(ep); 55172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 55272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 55372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req = kzalloc(sizeof(*req), gfp_flags); 55472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!req) { 55572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "not enough memory\n"); 55672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return NULL; 55772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 55872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 55972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->epnum = dep->number; 56072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->dep = dep; 56172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.dma = DMA_ADDR_INVALID; 56272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 56372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return &req->request; 56472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 56572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 56672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_ep_free_request(struct usb_ep *ep, 56772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct usb_request *request) 56872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 56972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req = to_dwc3_request(request); 57072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 57172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi kfree(req); 57272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 57372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 574c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi/** 575c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi * dwc3_prepare_one_trb - setup one TRB from one request 576c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi * @dep: endpoint for which this request is prepared 577c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi * @req: dwc3_request pointer 578c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi */ 57968e823e24aea5227eaf20d6435485e733109d113Felipe Balbistatic void dwc3_prepare_one_trb(struct dwc3_ep *dep, 580eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi struct dwc3_request *req, dma_addr_t dma, 581eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi unsigned length, unsigned last, unsigned chain) 582c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi{ 583eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi struct dwc3 *dwc = dep->dwc; 584c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi struct dwc3_trb_hw *trb_hw; 585c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi struct dwc3_trb trb; 586c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 587c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi unsigned int cur_slot; 588c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 589eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dev_vdbg(dwc->dev, "%s: req %p dma %08llx length %d%s%s\n", 590eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dep->name, req, (unsigned long long) dma, 591eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi length, last ? " last" : "", 592eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi chain ? " chain" : ""); 593eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi 594c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi trb_hw = &dep->trb_pool[dep->free_slot & DWC3_TRB_MASK]; 595c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi cur_slot = dep->free_slot; 596c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi dep->free_slot++; 597c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 598c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi /* Skip the LINK-TRB on ISOC */ 599c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi if (((cur_slot & DWC3_TRB_MASK) == DWC3_TRB_NUM - 1) && 600c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi usb_endpoint_xfer_isoc(dep->desc)) 60168e823e24aea5227eaf20d6435485e733109d113Felipe Balbi return; 602c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 603c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi memset(&trb, 0, sizeof(trb)); 604eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (!req->trb) { 605eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dwc3_gadget_move_request_queued(req); 606eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi req->trb = trb_hw; 607eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi req->trb_dma = dwc3_trb_dma_offset(dep, trb_hw); 608eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi } 609c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 610c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi if (usb_endpoint_xfer_isoc(dep->desc)) { 611c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi trb.isp_imi = true; 612c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi trb.csp = true; 613c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi } else { 614eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi trb.chn = chain; 615c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi trb.lst = last; 616c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi } 617c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 618c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi if (usb_endpoint_xfer_bulk(dep->desc) && dep->stream_capable) 619c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi trb.sid_sofn = req->request.stream_id; 620c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 621c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi switch (usb_endpoint_type(dep->desc)) { 622c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi case USB_ENDPOINT_XFER_CONTROL: 623c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi trb.trbctl = DWC3_TRBCTL_CONTROL_SETUP; 624c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi break; 625c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 626c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi case USB_ENDPOINT_XFER_ISOC: 627c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi trb.trbctl = DWC3_TRBCTL_ISOCHRONOUS_FIRST; 628c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 629c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi /* IOC every DWC3_TRB_NUM / 4 so we can refill */ 630c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi if (!(cur_slot % (DWC3_TRB_NUM / 4))) 631c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi trb.ioc = last; 632c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi break; 633c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 634c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi case USB_ENDPOINT_XFER_BULK: 635c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi case USB_ENDPOINT_XFER_INT: 636c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi trb.trbctl = DWC3_TRBCTL_NORMAL; 637c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi break; 638c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi default: 639c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi /* 640c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi * This is only possible with faulty memory because we 641c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi * checked it already :) 642c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi */ 643c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi BUG(); 644c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi } 645c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 646eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi trb.length = length; 647eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi trb.bplh = dma; 648c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi trb.hwo = true; 649c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 650c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi dwc3_trb_to_hw(&trb, trb_hw); 651c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi} 652c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 65372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* 65472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * dwc3_prepare_trbs - setup TRBs from requests 65572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * @dep: endpoint for which requests are being prepared 65672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * @starting: true if the endpoint is idle and no requests are queued. 65772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 65872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * The functions goes through the requests list and setups TRBs for the 65972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * transfers. The functions returns once there are not more TRBs available or 66072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * it run out of requests. 66172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 66268e823e24aea5227eaf20d6435485e733109d113Felipe Balbistatic void dwc3_prepare_trbs(struct dwc3_ep *dep, bool starting) 66372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 66468e823e24aea5227eaf20d6435485e733109d113Felipe Balbi struct dwc3_request *req, *n; 66572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 trbs_left; 666c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi unsigned int last_one = 0; 66772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 66872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi BUILD_BUG_ON_NOT_POWER_OF_2(DWC3_TRB_NUM); 66972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 67072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* the first request must not be queued */ 67172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trbs_left = (dep->busy_slot - dep->free_slot) & DWC3_TRB_MASK; 672c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 67372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 67472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * if busy & slot are equal than it is either full or empty. If we are 67572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * starting to proceed requests then we are empty. Otherwise we ar 67672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * full and don't do anything 67772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 67872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!trbs_left) { 67972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!starting) 68068e823e24aea5227eaf20d6435485e733109d113Felipe Balbi return; 68172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi trbs_left = DWC3_TRB_NUM; 68272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 68372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * In case we start from scratch, we queue the ISOC requests 68472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * starting from slot 1. This is done because we use ring 68572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * buffer and have no LST bit to stop us. Instead, we place 68672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * IOC bit TRB_NUM/4. We try to avoid to having an interrupt 68772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * after the first request so we start at slot 1 and have 68872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 7 requests proceed before we hit the first IOC. 68972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Other transfer types don't use the ring buffer and are 69072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * processed from the first TRB until the last one. Since we 69172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * don't wrap around we have to start at the beginning. 69272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 69372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (usb_endpoint_xfer_isoc(dep->desc)) { 69472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->busy_slot = 1; 69572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->free_slot = 1; 69672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 69772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->busy_slot = 0; 69872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->free_slot = 0; 69972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 70072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 70172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 70272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* The last TRB is a link TRB, not used for xfer */ 70372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if ((trbs_left <= 1) && usb_endpoint_xfer_isoc(dep->desc)) 70468e823e24aea5227eaf20d6435485e733109d113Felipe Balbi return; 70572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 70672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_for_each_entry_safe(req, n, &dep->request_list, list) { 707eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi unsigned length; 708eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dma_addr_t dma; 70972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 710eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (req->request.num_mapped_sgs > 0) { 711eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi struct usb_request *request = &req->request; 712eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi struct scatterlist *sg = request->sg; 713eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi struct scatterlist *s; 714eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi int i; 715c71fc37c191747ea1f00424e84f96c1f88e52bfcFelipe Balbi 716eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi for_each_sg(sg, s, request->num_mapped_sgs, i) { 717eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi unsigned chain = true; 71872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 719eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi length = sg_dma_len(s); 720eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dma = sg_dma_address(s); 72142f8eb7a1087442e9710ce75b355c0f28aadbf96Felipe Balbi 722eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (i == (request->num_mapped_sgs - 1) 723eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi || sg_is_last(s)) { 724eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi last_one = true; 725eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi chain = false; 726eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi } 727eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi 728eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi trbs_left--; 729eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (!trbs_left) 730eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi last_one = true; 731eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi 732eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (last_one) 733eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi chain = false; 734eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi 735eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dwc3_prepare_one_trb(dep, req, dma, length, 736eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi last_one, chain); 737eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi 738eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (last_one) 739eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi break; 740eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi } 741eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi } else { 742eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dma = req->request.dma; 743eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi length = req->request.length; 744eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi trbs_left--; 745eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi 746eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (!trbs_left) 747eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi last_one = 1; 748eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi 749eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi /* Is this the last request? */ 750eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (list_is_last(&req->list, &dep->request_list)) 751eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi last_one = 1; 752eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi 753eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dwc3_prepare_one_trb(dep, req, dma, length, 754eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi last_one, false); 755eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi 756eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi if (last_one) 757eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi break; 758eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi } 75972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 76072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 76172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 76272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int __dwc3_gadget_kick_transfer(struct dwc3_ep *dep, u16 cmd_param, 76372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int start_new) 76472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 76572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 76672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req; 76772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 76872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 76972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 cmd; 77072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 77172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (start_new && (dep->flags & DWC3_EP_BUSY)) { 77272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s: endpoint busy\n", dep->name); 77372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -EBUSY; 77472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 77572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags &= ~DWC3_EP_PENDING_REQUEST; 77672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 77772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 77872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * If we are getting here after a short-out-packet we don't enqueue any 77972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * new requests as we try to set the IOC bit only on the last request. 78072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 78172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (start_new) { 78272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (list_empty(&dep->req_queued)) 78372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_prepare_trbs(dep, start_new); 78472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 78572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* req points to the first request which will be sent */ 78672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req = next_request(&dep->req_queued); 78772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 78868e823e24aea5227eaf20d6435485e733109d113Felipe Balbi dwc3_prepare_trbs(dep, start_new); 78968e823e24aea5227eaf20d6435485e733109d113Felipe Balbi 79072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 79172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * req points to the first request where HWO changed 79272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * from 0 to 1 79372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 79468e823e24aea5227eaf20d6435485e733109d113Felipe Balbi req = next_request(&dep->req_queued); 79572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 79672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!req) { 79772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags |= DWC3_EP_PENDING_REQUEST; 79872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 79972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 80072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 80172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0, sizeof(params)); 802dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param0 = upper_32_bits(req->trb_dma); 803dc1c70a774b6fe3744b330d58bb9cf802f7eac89Felipe Balbi params.param1 = lower_32_bits(req->trb_dma); 80472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 80572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (start_new) 80672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd = DWC3_DEPCMD_STARTTRANSFER; 80772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi else 80872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd = DWC3_DEPCMD_UPDATETRANSFER; 80972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 81072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd |= DWC3_DEPCMD_PARAM(cmd_param); 81172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, cmd, ¶ms); 81272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret < 0) { 81372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "failed to send STARTTRANSFER command\n"); 81472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 81572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 81672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * FIXME we need to iterate over the list of requests 81772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * here and stop, unmap, free and del each of the linked 81872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * requests instead of we do now. 81972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 82072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_unmap_buffer_from_dma(req); 82172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_del(&req->list); 82272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 82372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 82472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 82572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags |= DWC3_EP_BUSY; 82672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->res_trans_idx = dwc3_gadget_ep_get_transfer_index(dwc, 82772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->number); 82872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dep->res_trans_idx) 82972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi printk_once(KERN_ERR "%s() res_trans_idx is invalid\n", __func__); 83072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 83172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 83272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 83372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int __dwc3_gadget_ep_queue(struct dwc3_ep *dep, struct dwc3_request *req) 83472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 83572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.actual = 0; 83672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.status = -EINPROGRESS; 83772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->direction = dep->direction; 83872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->epnum = dep->number; 83972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 84072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 84172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We only add to our list of requests now and 84272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * start consuming the list once we get XferNotReady 84372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * IRQ. 84472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 84572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * That way, we avoid doing anything that we don't need 84672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * to do now and defer it until the point we receive a 84772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * particular token from the Host side. 84872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 84972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * This will also avoid Host cancelling URBs due to too 85072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * many NACKs. 85172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 85272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_map_buffer_to_dma(req); 85372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_add_tail(&req->list, &dep->request_list); 85472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 85572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 85672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * There is one special case: XferNotReady with 85772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * empty list of requests. We need to kick the 85872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * transfer here in that situation, otherwise 85972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * we will be NAKing forever. 86072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 86172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * If we get XferNotReady before gadget driver 86272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * has a chance to queue a request, we will ACK 86372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * the IRQ but won't be able to receive the data 86472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * until the next request is queued. The following 86572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * code is handling exactly that. 86672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 86772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->flags & DWC3_EP_PENDING_REQUEST) { 86872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 86972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int start_trans; 87072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 87172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi start_trans = 1; 87272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (usb_endpoint_xfer_isoc(dep->endpoint.desc) && 87372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags & DWC3_EP_BUSY) 87472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi start_trans = 0; 87572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 87672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = __dwc3_gadget_kick_transfer(dep, 0, start_trans); 87772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret && ret != -EBUSY) { 87872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 87972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 88072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "%s: failed to kick transfers\n", 88172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 88272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 88372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi }; 88472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 88572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 88672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 88772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 88872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_queue(struct usb_ep *ep, struct usb_request *request, 88972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi gfp_t gfp_flags) 89072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 89172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req = to_dwc3_request(request); 89272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = to_dwc3_ep(ep); 89372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 89472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 89572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 89672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 89772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 89872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 89972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dep->desc) { 90072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "trying to queue request %p to disabled %s\n", 90172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi request, ep->name); 90272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -ESHUTDOWN; 90372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 90472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 90572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "queing request %p to %s length %d\n", 90672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi request, ep->name, request->length); 90772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 90872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 90972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = __dwc3_gadget_ep_queue(dep, req); 91072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 91172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 91272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 91372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 91472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 91572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_dequeue(struct usb_ep *ep, 91672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct usb_request *request) 91772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 91872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req = to_dwc3_request(request); 91972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *r = NULL; 92072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 92172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = to_dwc3_ep(ep); 92272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 92372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 92472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 92572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret = 0; 92672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 92772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 92872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 92972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_for_each_entry(r, &dep->request_list, list) { 93072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (r == req) 93172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 93272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 93372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 93472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (r != req) { 93572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_for_each_entry(r, &dep->req_queued, list) { 93672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (r == req) 93772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 93872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 93972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (r == req) { 94072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* wait until it is processed */ 94172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_stop_active_transfer(dwc, dep->number); 94272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto out0; 94372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 94472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "request %p was not queued to %s\n", 94572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi request, ep->name); 94672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EINVAL; 94772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto out0; 94872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 94972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 95072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* giveback the request */ 95172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_giveback(dep, req, -ECONNRESET); 95272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 95372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiout0: 95472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 95572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 95672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 95772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 95872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 95972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiint __dwc3_gadget_ep_set_halt(struct dwc3_ep *dep, int value) 96072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 96172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 96272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 96372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 96472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 96572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0x00, sizeof(params)); 96672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 96772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (value) { 9680b7836a9eb32f626ffd3fe3045e8c618cb8ed965Felipe Balbi if (dep->number == 0 || dep->number == 1) { 9690b7836a9eb32f626ffd3fe3045e8c618cb8ed965Felipe Balbi /* 9700b7836a9eb32f626ffd3fe3045e8c618cb8ed965Felipe Balbi * Whenever EP0 is stalled, we will restart 9710b7836a9eb32f626ffd3fe3045e8c618cb8ed965Felipe Balbi * the state machine, thus moving back to 9720b7836a9eb32f626ffd3fe3045e8c618cb8ed965Felipe Balbi * Setup Phase 9730b7836a9eb32f626ffd3fe3045e8c618cb8ed965Felipe Balbi */ 9740b7836a9eb32f626ffd3fe3045e8c618cb8ed965Felipe Balbi dwc->ep0state = EP0_SETUP_PHASE; 9750b7836a9eb32f626ffd3fe3045e8c618cb8ed965Felipe Balbi } 97672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 97772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, 97872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEPCMD_SETSTALL, ¶ms); 97972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 98072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to %s STALL on %s\n", 98172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi value ? "set" : "clear", 98272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 98372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi else 98472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags |= DWC3_EP_STALL; 98572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 9865275455a6e6ae6b57303834b0afd267bb9657ffcPaul Zimmerman if (dep->flags & DWC3_EP_WEDGE) 9875275455a6e6ae6b57303834b0afd267bb9657ffcPaul Zimmerman return 0; 9885275455a6e6ae6b57303834b0afd267bb9657ffcPaul Zimmerman 98972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, 99072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEPCMD_CLEARSTALL, ¶ms); 99172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 99272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to %s STALL on %s\n", 99372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi value ? "set" : "clear", 99472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 99572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi else 99672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags &= ~DWC3_EP_STALL; 99772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 9985275455a6e6ae6b57303834b0afd267bb9657ffcPaul Zimmerman 99972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 100072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 100172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 100272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_set_halt(struct usb_ep *ep, int value) 100372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 100472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = to_dwc3_ep(ep); 100572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 100672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 100772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 100872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 100972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 101072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 101172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 101272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 101372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (usb_endpoint_xfer_isoc(dep->desc)) { 101472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "%s is of Isochronous type\n", dep->name); 101572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EINVAL; 101672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto out; 101772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 101872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 101972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = __dwc3_gadget_ep_set_halt(dep, value); 102072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiout: 102172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 102272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 102372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 102472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 102572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 102672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_ep_set_wedge(struct usb_ep *ep) 102772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 102872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep = to_dwc3_ep(ep); 102972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 103072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags |= DWC3_EP_WEDGE; 103172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 10325275455a6e6ae6b57303834b0afd267bb9657ffcPaul Zimmerman return dwc3_gadget_ep_set_halt(ep, 1); 103372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 103472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 103572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 103672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 103772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic struct usb_endpoint_descriptor dwc3_gadget_ep0_desc = { 103872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .bLength = USB_DT_ENDPOINT_SIZE, 103972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .bDescriptorType = USB_DT_ENDPOINT, 104072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .bmAttributes = USB_ENDPOINT_XFER_CONTROL, 104172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi}; 104272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 104372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic const struct usb_ep_ops dwc3_gadget_ep0_ops = { 104472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .enable = dwc3_gadget_ep0_enable, 104572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .disable = dwc3_gadget_ep0_disable, 104672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .alloc_request = dwc3_gadget_ep_alloc_request, 104772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .free_request = dwc3_gadget_ep_free_request, 104872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .queue = dwc3_gadget_ep0_queue, 104972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .dequeue = dwc3_gadget_ep_dequeue, 105072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .set_halt = dwc3_gadget_ep_set_halt, 105172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .set_wedge = dwc3_gadget_ep_set_wedge, 105272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi}; 105372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 105472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic const struct usb_ep_ops dwc3_gadget_ep_ops = { 105572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .enable = dwc3_gadget_ep_enable, 105672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .disable = dwc3_gadget_ep_disable, 105772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .alloc_request = dwc3_gadget_ep_alloc_request, 105872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .free_request = dwc3_gadget_ep_free_request, 105972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .queue = dwc3_gadget_ep_queue, 106072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .dequeue = dwc3_gadget_ep_dequeue, 106172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .set_halt = dwc3_gadget_ep_set_halt, 106272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .set_wedge = dwc3_gadget_ep_set_wedge, 106372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi}; 106472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 106572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 106672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 106772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_get_frame(struct usb_gadget *g) 106872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 106972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 107072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 107172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 107272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 107372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return DWC3_DSTS_SOFFN(reg); 107472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 107572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 107672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_wakeup(struct usb_gadget *g) 107772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 107872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 107972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 108072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long timeout; 108172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 108272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 108372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 108472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 108572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret = 0; 108672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 108772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 link_state; 108872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 speed; 108972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 109072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 109172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 109272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 109372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * According to the Databook Remote wakeup request should 109472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * be issued only when the device is in early suspend state. 109572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 109672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We can check that via USB Link State bits in DSTS register. 109772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 109872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 109972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 110072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi speed = reg & DWC3_DSTS_CONNECTSPD; 110172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (speed == DWC3_DSTS_SUPERSPEED) { 110272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "no wakeup on SuperSpeed\n"); 110372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EINVAL; 110472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto out; 110572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 110672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 110772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi link_state = DWC3_DSTS_USBLNKST(reg); 110872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 110972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (link_state) { 111072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_LINK_STATE_RX_DET: /* in HS, means Early Suspend */ 111172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_LINK_STATE_U3: /* in HS, means SUSPEND */ 111272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 111372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 111472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "can't wakeup from link state %d\n", 111572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi link_state); 111672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EINVAL; 111772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto out; 111872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 111972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 112072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 112172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 112272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 112372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Switch link state to Recovery. In HS/FS/LS this means 112472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * RemoteWakeup Request 112572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 112672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg |= DWC3_DCTL_ULSTCHNG_RECOVERY; 112772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 112872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 112972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* wait for at least 2000us */ 113072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi usleep_range(2000, 2500); 113172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 113272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* write zeroes to Link Change Request */ 113372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DCTL_ULSTCHNGREQ_MASK; 113472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 113572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 113672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* pool until Link State change to ON */ 113772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi timeout = jiffies + msecs_to_jiffies(100); 113872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 113972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi while (!(time_after(jiffies, timeout))) { 114072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 114172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 114272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* in HS, means ON */ 114372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (DWC3_DSTS_USBLNKST(reg) == DWC3_LINK_STATE_U0) 114472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 114572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 114672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 114772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (DWC3_DSTS_USBLNKST(reg) != DWC3_LINK_STATE_U0) { 114872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to send remote wakeup\n"); 114972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EINVAL; 115072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 115172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 115272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiout: 115372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 115472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 115572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 115672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 115772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 115872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_set_selfpowered(struct usb_gadget *g, 115972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int is_selfpowered) 116072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 116172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 116272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 116372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->is_selfpowered = !!is_selfpowered; 116472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 116572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 116672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 116772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 116872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_run_stop(struct dwc3 *dwc, int is_on) 116972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 117072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 117161d58242f634642de42d6a4098913b7254a65053Sebastian Andrzej Siewior u32 timeout = 500; 117272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 117372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 117472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (is_on) 117572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg |= DWC3_DCTL_RUN_STOP; 117672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi else 117772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DCTL_RUN_STOP; 117872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 117972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 118072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 118172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi do { 118272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 118372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (is_on) { 118472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(reg & DWC3_DSTS_DEVCTRLHLT)) 118572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 118672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 118772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (reg & DWC3_DSTS_DEVCTRLHLT) 118872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 118972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 119072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi timeout--; 119172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!timeout) 119272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 119361d58242f634642de42d6a4098913b7254a65053Sebastian Andrzej Siewior udelay(1); 119472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } while (1); 119572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 119672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "gadget %s data soft-%s\n", 119772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver 119872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ? dwc->gadget_driver->function : "no-function", 119972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi is_on ? "connect" : "disconnect"); 120072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 120172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 120272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_pullup(struct usb_gadget *g, int is_on) 120372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 120472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 120572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 120672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 120772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi is_on = !!is_on; 120872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 120972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 121072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_run_stop(dwc, is_on); 121172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 121272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 121372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 121472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 121572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 121672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_start(struct usb_gadget *g, 121772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct usb_gadget_driver *driver) 121872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 121972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 122072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 122172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 122272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret = 0; 122372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 122472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 122572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 122672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 122772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dwc->gadget_driver) { 122872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "%s is already bound to %s\n", 122972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.name, 123072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver->driver.name); 123172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -EBUSY; 123272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto err0; 123372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 123472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 123572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver = driver; 123672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.dev.driver = &driver->driver; 123772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 123872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_GCTL); 123972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1240771f184ecebf34929a849eaa707aa463234254f7Felipe Balbi reg &= ~DWC3_GCTL_SCALEDOWN(3); 1241771f184ecebf34929a849eaa707aa463234254f7Felipe Balbi reg &= ~DWC3_GCTL_PRTCAPDIR(DWC3_GCTL_PRTCAP_OTG); 124272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_GCTL_DISSCRAMBLE; 1243771f184ecebf34929a849eaa707aa463234254f7Felipe Balbi reg |= DWC3_GCTL_PRTCAPDIR(DWC3_GCTL_PRTCAP_DEVICE); 124472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1245aabb70752361a8b8ca44142a942a5bd133c4d304Felipe Balbi switch (DWC3_GHWPARAMS1_EN_PWROPT(dwc->hwparams.hwparams0)) { 1246aabb70752361a8b8ca44142a942a5bd133c4d304Felipe Balbi case DWC3_GHWPARAMS1_EN_PWROPT_CLK: 1247aabb70752361a8b8ca44142a942a5bd133c4d304Felipe Balbi reg &= ~DWC3_GCTL_DSBLCLKGTNG; 1248aabb70752361a8b8ca44142a942a5bd133c4d304Felipe Balbi break; 1249aabb70752361a8b8ca44142a942a5bd133c4d304Felipe Balbi default: 1250aabb70752361a8b8ca44142a942a5bd133c4d304Felipe Balbi dev_dbg(dwc->dev, "No power optimization available\n"); 1251aabb70752361a8b8ca44142a942a5bd133c4d304Felipe Balbi } 1252aabb70752361a8b8ca44142a942a5bd133c4d304Felipe Balbi 125372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 125472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * WORKAROUND: DWC3 revisions <1.90a have a bug 125572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * when The device fails to connect at SuperSpeed 125672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * and falls back to high-speed mode which causes 125772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * the device to enter in a Connect/Disconnect loop 125872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 125972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dwc->revision < DWC3_REVISION_190A) 126072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg |= DWC3_GCTL_U2RSTECN; 126172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 126272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_GCTL, reg); 126372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 126472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCFG); 126572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~(DWC3_DCFG_SPEED_MASK); 126672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg |= DWC3_DCFG_SUPERSPEED; 126772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCFG, reg); 126872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1269b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman dwc->start_config_issued = false; 1270b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman 127172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* Start with SuperSpeed Default */ 127272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(512); 127372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 127472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[0]; 127572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc); 127672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 127772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to enable %s\n", dep->name); 127872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto err0; 127972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 128072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 128172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[1]; 128272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc); 128372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 128472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to enable %s\n", dep->name); 128572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto err1; 128672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 128772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 128872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* begin to receive SETUP packets */ 1289c7fcdeb2627c46b7ec3f0bcb2054b10405f9a70eFelipe Balbi dwc->ep0state = EP0_SETUP_PHASE; 129072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_ep0_out_start(dwc); 129172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 129272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 129372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 129472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 129572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 129672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbierr1: 129772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi __dwc3_gadget_ep_disable(dwc->eps[0]); 129872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 129972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbierr0: 130072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 130172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 130272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 130372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 130472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 130572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_gadget_stop(struct usb_gadget *g, 130672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct usb_gadget_driver *driver) 130772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 130872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = gadget_to_dwc(g); 130972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned long flags; 131072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 131172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock_irqsave(&dwc->lock, flags); 131272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 131372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi __dwc3_gadget_ep_disable(dwc->eps[0]); 131472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi __dwc3_gadget_ep_disable(dwc->eps[1]); 131572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 131672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver = NULL; 131772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.dev.driver = NULL; 131872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 131972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 132072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 132172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 132272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 132372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic const struct usb_gadget_ops dwc3_gadget_ops = { 132472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .get_frame = dwc3_gadget_get_frame, 132572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .wakeup = dwc3_gadget_wakeup, 132672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .set_selfpowered = dwc3_gadget_set_selfpowered, 132772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .pullup = dwc3_gadget_pullup, 132872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .udc_start = dwc3_gadget_start, 132972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi .udc_stop = dwc3_gadget_stop, 133072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi}; 133172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 133272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 133372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 133472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int __devinit dwc3_gadget_init_endpoints(struct dwc3 *dwc) 133572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 133672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 133772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 epnum; 133872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 133972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi INIT_LIST_HEAD(&dwc->gadget.ep_list); 134072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 134172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi for (epnum = 0; epnum < DWC3_ENDPOINTS_NUM; epnum++) { 134272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = kzalloc(sizeof(*dep), GFP_KERNEL); 134372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dep) { 134472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "can't allocate endpoint %d\n", 134572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi epnum); 134672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return -ENOMEM; 134772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 134872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 134972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->dwc = dwc; 135072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->number = epnum; 135172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->eps[epnum] = dep; 135272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 135372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi snprintf(dep->name, sizeof(dep->name), "ep%d%s", epnum >> 1, 135472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi (epnum & 1) ? "in" : "out"); 135572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->endpoint.name = dep->name; 135672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->direction = (epnum & 1); 135772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 135872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (epnum == 0 || epnum == 1) { 135972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->endpoint.maxpacket = 512; 136072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->endpoint.ops = &dwc3_gadget_ep0_ops; 136172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!epnum) 136272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ep0 = &dep->endpoint; 136372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 136472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 136572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 136672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->endpoint.maxpacket = 1024; 136712d36c16bde3ee0643d705caa87723de536dbe49Sebastian Andrzej Siewior dep->endpoint.max_streams = 15; 136872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->endpoint.ops = &dwc3_gadget_ep_ops; 136972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_add_tail(&dep->endpoint.ep_list, 137072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi &dwc->gadget.ep_list); 137172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 137272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_alloc_trb_pool(dep); 137372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 137472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "%s: failed to allocate TRB pool\n", dep->name); 137572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 137672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 137772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 137872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi INIT_LIST_HEAD(&dep->request_list); 137972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi INIT_LIST_HEAD(&dep->req_queued); 138072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 138172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 138272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 138372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 138472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 138572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_free_endpoints(struct dwc3 *dwc) 138672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 138772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 138872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 epnum; 138972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 139072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi for (epnum = 0; epnum < DWC3_ENDPOINTS_NUM; epnum++) { 139172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[epnum]; 139272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_free_trb_pool(dep); 139372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 139472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (epnum != 0 && epnum != 1) 139572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi list_del(&dep->endpoint.ep_list); 139672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 139772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi kfree(dep); 139872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 139972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 140072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 140172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_release(struct device *dev) 140272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 140372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dev, "%s\n", __func__); 140472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 140572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 140672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/* -------------------------------------------------------------------------- */ 140772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic int dwc3_cleanup_done_reqs(struct dwc3 *dwc, struct dwc3_ep *dep, 140872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct dwc3_event_depevt *event, int status) 140972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 141072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_request *req; 141172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_trb trb; 141272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned int count; 141372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned int s_pkt = 0; 141472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 141572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi do { 141672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req = next_request(&dep->req_queued); 141772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!req) 141872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 141972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 142072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_trb_to_nat(req->trb, &trb); 142172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 14220d2f4758530d1598087d1d2f3e75b4f7d17fc6c7Sebastian Andrzej Siewior if (trb.hwo && status != -ESHUTDOWN) 14230d2f4758530d1598087d1d2f3e75b4f7d17fc6c7Sebastian Andrzej Siewior /* 14240d2f4758530d1598087d1d2f3e75b4f7d17fc6c7Sebastian Andrzej Siewior * We continue despite the error. There is not much we 14250d2f4758530d1598087d1d2f3e75b4f7d17fc6c7Sebastian Andrzej Siewior * can do. If we don't clean in up we loop for ever. If 14260d2f4758530d1598087d1d2f3e75b4f7d17fc6c7Sebastian Andrzej Siewior * we skip the TRB than it gets overwritten reused after 14270d2f4758530d1598087d1d2f3e75b4f7d17fc6c7Sebastian Andrzej Siewior * a while since we use them in a ring buffer. a BUG() 14280d2f4758530d1598087d1d2f3e75b4f7d17fc6c7Sebastian Andrzej Siewior * would help. Lets hope that if this occures, someone 14290d2f4758530d1598087d1d2f3e75b4f7d17fc6c7Sebastian Andrzej Siewior * fixes the root cause instead of looking away :) 14300d2f4758530d1598087d1d2f3e75b4f7d17fc6c7Sebastian Andrzej Siewior */ 143172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "%s's TRB (%p) still owned by HW\n", 143272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name, req->trb); 143372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi count = trb.length; 143472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 143572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->direction) { 143672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (count) { 143772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "incomplete IN transfer %s\n", 143872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 143972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi status = -ECONNRESET; 144072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 144172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 144272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (count && (event->status & DEPEVT_STATUS_SHORT)) 144372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi s_pkt = 1; 144472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 144572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 144672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 144772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We assume here we will always receive the entire data block 144872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * which we should receive. Meaning, if we program RX to 144972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * receive 4K but we receive only 2K, we assume that's all we 145072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * should receive and we simply bounce the request back to the 145172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * gadget driver for further processing. 145272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 145372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi req->request.actual += req->request.length - count; 145472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_giveback(dep, req, status); 145572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (s_pkt) 145672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 145772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if ((event->status & DEPEVT_STATUS_LST) && trb.lst) 145872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 145972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if ((event->status & DEPEVT_STATUS_IOC) && trb.ioc) 146072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 146172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } while (1); 146272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 146372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if ((event->status & DEPEVT_STATUS_IOC) && trb.ioc) 146472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 146572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 1; 146672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 146772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 146872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_endpoint_transfer_complete(struct dwc3 *dwc, 146972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep, const struct dwc3_event_depevt *event, 147072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int start_new) 147172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 147272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned status = 0; 147372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int clean_busy; 147472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 147572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (event->status & DEPEVT_STATUS_BUSERR) 147672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi status = -ECONNRESET; 147772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 147872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi clean_busy = dwc3_cleanup_done_reqs(dwc, dep, event, status); 1479a1ae9be5fc137d7e911a77ef408273ff55a53a39Sebastian Andrzej Siewior if (clean_busy) { 148072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags &= ~DWC3_EP_BUSY; 1481a1ae9be5fc137d7e911a77ef408273ff55a53a39Sebastian Andrzej Siewior dep->res_trans_idx = 0; 1482a1ae9be5fc137d7e911a77ef408273ff55a53a39Sebastian Andrzej Siewior } 148372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 148472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 148572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_start_isoc(struct dwc3 *dwc, 148672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep, const struct dwc3_event_depevt *event) 148772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 148872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 uf; 148972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 149072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (list_empty(&dep->request_list)) { 149172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "ISOC ep %s run out for requests.\n", 149272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 149372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 149472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 149572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 149672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (event->parameters) { 149772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 mask; 149872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 149972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi mask = ~(dep->interval - 1); 150072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi uf = event->parameters & mask; 150172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 4 micro frames in the future */ 150272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi uf += dep->interval * 4; 150372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 150472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi uf = 0; 150572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 150672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 150772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi __dwc3_gadget_kick_transfer(dep, uf, 1); 150872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 150972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 151072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_process_ep_cmd_complete(struct dwc3_ep *dep, 151172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct dwc3_event_depevt *event) 151272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 151372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = dep->dwc; 151472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_event_depevt mod_ev = *event; 151572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 151672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 151772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We were asked to remove one requests. It is possible that this 151872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * request and a few other were started together and have the same 151972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * transfer index. Since we stopped the complete endpoint we don't 152072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * know how many requests were already completed (and not yet) 152172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * reported and how could be done (later). We purge them all until 152272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * the end of the list. 152372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 152472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi mod_ev.status = DEPEVT_STATUS_LST; 152572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_cleanup_done_reqs(dwc, dep, &mod_ev, -ESHUTDOWN); 152672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags &= ~DWC3_EP_BUSY; 152772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* pending requets are ignored and are queued on XferNotReady */ 152872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 152972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 153072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_ep_cmd_compl(struct dwc3_ep *dep, 153172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct dwc3_event_depevt *event) 153272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 153372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 param = event->parameters; 153472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 cmd_type = (param >> 8) & ((1 << 5) - 1); 153572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 153672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (cmd_type) { 153772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_ENDTRANSFER: 153872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_process_ep_cmd_complete(dep, event); 153972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 154072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPCMD_STARTTRANSFER: 154172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->res_trans_idx = param & 0x7f; 154272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 154372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 154472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi printk(KERN_ERR "%s() unknown /unexpected type: %d\n", 154572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi __func__, cmd_type); 154672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 154772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi }; 154872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 154972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 155072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_endpoint_interrupt(struct dwc3 *dwc, 155172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct dwc3_event_depevt *event) 155272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 155372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 155472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 epnum = event->endpoint_number; 155572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 155672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[epnum]; 155772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 155872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s: %s\n", dep->name, 155972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_ep_event_string(event->endpoint_event)); 156072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 156172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (epnum == 0 || epnum == 1) { 156272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_ep0_interrupt(dwc, event); 156372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 156472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 156572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 156672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (event->endpoint_event) { 156772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPEVT_XFERCOMPLETE: 156872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (usb_endpoint_xfer_isoc(dep->desc)) { 156972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "%s is an Isochronous endpoint\n", 157072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 157172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 157272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 157372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 157472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_endpoint_transfer_complete(dwc, dep, event, 1); 157572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 157672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPEVT_XFERINPROGRESS: 157772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!usb_endpoint_xfer_isoc(dep->desc)) { 157872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "%s is not an Isochronous endpoint\n", 157972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 158072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 158172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 158272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 158372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_endpoint_transfer_complete(dwc, dep, event, 0); 158472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 158572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPEVT_XFERNOTREADY: 158672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (usb_endpoint_xfer_isoc(dep->desc)) { 158772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_start_isoc(dwc, dep, event); 158872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } else { 158972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 159072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 159172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s: reason %s\n", 159272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name, event->status 159372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ? "Transfer Active" 159472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi : "Transfer Not Active"); 159572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 159672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = __dwc3_gadget_kick_transfer(dep, 0, 1); 159772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!ret || ret == -EBUSY) 159872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 159972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 160072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "%s: failed to kick transfers\n", 160172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->name); 160272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 160372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 160472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 1605879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi case DWC3_DEPEVT_STREAMEVT: 1606879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi if (!usb_endpoint_xfer_bulk(dep->desc)) { 1607879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dev_err(dwc->dev, "Stream event for non-Bulk %s\n", 1608879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dep->name); 1609879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi return; 1610879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi } 1611879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi 1612879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi switch (event->status) { 1613879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi case DEPEVT_STREAMEVT_FOUND: 1614879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dev_vdbg(dwc->dev, "Stream %d found and started\n", 1615879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi event->parameters); 1616879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi 1617879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi break; 1618879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi case DEPEVT_STREAMEVT_NOTFOUND: 1619879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi /* FALLTHROUGH */ 1620879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi default: 1621879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi dev_dbg(dwc->dev, "Couldn't find suitable stream\n"); 1622879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi } 1623879631aa658be2c1307758223b6d15236f9f6335Felipe Balbi break; 162472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPEVT_RXTXFIFOEVT: 162572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "%s FIFO Overrun\n", dep->name); 162672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 162772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEPEVT_EPCMDCMPLT: 162872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_ep_cmd_compl(dep, event); 162972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 163072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 163172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 163272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 163372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_disconnect_gadget(struct dwc3 *dwc) 163472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 163572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dwc->gadget_driver && dwc->gadget_driver->disconnect) { 163672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock(&dwc->lock); 163772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver->disconnect(&dwc->gadget); 163872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock(&dwc->lock); 163972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 164072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 164172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 164272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_stop_active_transfer(struct dwc3 *dwc, u32 epnum) 164372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 164472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 164572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 164672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 cmd; 164772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 164872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 164972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[epnum]; 165072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1651624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior WARN_ON(!dep->res_trans_idx); 165272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dep->res_trans_idx) { 165372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd = DWC3_DEPCMD_ENDTRANSFER; 165472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd |= DWC3_DEPCMD_HIPRI_FORCERM | DWC3_DEPCMD_CMDIOC; 165572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi cmd |= DWC3_DEPCMD_PARAM(dep->res_trans_idx); 165672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0, sizeof(params)); 165772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, cmd, ¶ms); 165872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi WARN_ON_ONCE(ret); 1659a1ae9be5fc137d7e911a77ef408273ff55a53a39Sebastian Andrzej Siewior dep->res_trans_idx = 0; 166072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 166172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 166272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 166372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_stop_active_transfers(struct dwc3 *dwc) 166472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 166572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 epnum; 166672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 166772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi for (epnum = 2; epnum < DWC3_ENDPOINTS_NUM; epnum++) { 166872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 166972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 167072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[epnum]; 167172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(dep->flags & DWC3_EP_ENABLED)) 167272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi continue; 167372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 1674624407f96f134bcd3063eb0d404fc6d41323bef8Sebastian Andrzej Siewior dwc3_remove_requests(dwc, dep); 167572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 167672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 167772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 167872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_clear_stall_all_ep(struct dwc3 *dwc) 167972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 168072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 epnum; 168172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 168272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi for (epnum = 1; epnum < DWC3_ENDPOINTS_NUM; epnum++) { 168372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 168472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 168572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 168672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 168772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[epnum]; 168872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 168972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!(dep->flags & DWC3_EP_STALL)) 169072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi continue; 169172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 169272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep->flags &= ~DWC3_EP_STALL; 169372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 169472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0, sizeof(params)); 169572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, 169672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEPCMD_CLEARSTALL, ¶ms); 169772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi WARN_ON_ONCE(ret); 169872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 169972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 170072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 170172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_disconnect_interrupt(struct dwc3 *dwc) 170272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 170372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s\n", __func__); 170472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#if 0 170572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi XXX 170672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi U1/U2 is powersave optimization. Skip it for now. Anyway we need to 170772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi enable it before we can disable it. 170872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 170972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 171072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DCTL_INITU1ENA; 171172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 171272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 171372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DCTL_INITU2ENA; 171472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 171572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi#endif 171672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 171772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_stop_active_transfers(dwc); 171872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_disconnect_gadget(dwc); 1719b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman dwc->start_config_issued = false; 172072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 172172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_UNKNOWN; 172272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 172372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 172472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_usb3_phy_power(struct dwc3 *dwc, int on) 172572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 172672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 172772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 172872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(0)); 172972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 173072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (on) 173172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_GUSB3PIPECTL_SUSPHY; 173272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi else 173372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg |= DWC3_GUSB3PIPECTL_SUSPHY; 173472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 173572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg); 173672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 173772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 173872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_usb2_phy_power(struct dwc3 *dwc, int on) 173972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 174072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 174172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 174272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0)); 174372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 174472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (on) 174572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_GUSB2PHYCFG_SUSPHY; 174672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi else 174772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg |= DWC3_GUSB2PHYCFG_SUSPHY; 174872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 174972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg); 175072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 175172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 175272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_reset_interrupt(struct dwc3 *dwc) 175372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 175472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 175572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 175672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s\n", __func__); 175772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 175872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* Enable PHYs */ 175972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_usb2_phy_power(dwc, true); 176072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_usb3_phy_power(dwc, true); 176172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 176272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (dwc->gadget.speed != USB_SPEED_UNKNOWN) 176372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_disconnect_gadget(dwc); 176472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 176572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 176672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~DWC3_DCTL_TSTCTRL_MASK; 176772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 176872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 176972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_stop_active_transfers(dwc); 177072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_clear_stall_all_ep(dwc); 1771b23c843992b659d537514e6493d673284f5d6724Paul Zimmerman dwc->start_config_issued = false; 177272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 177372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* Reset device address to zero */ 177472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCFG); 177572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg &= ~(DWC3_DCFG_DEVADDR_MASK); 177672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DCFG, reg); 177772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 177872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 177972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_update_ram_clk_sel(struct dwc3 *dwc, u32 speed) 178072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 178172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 178272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 usb30_clock = DWC3_GCTL_CLK_BUS; 178372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 178472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 178572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * We change the clock only at SS but I dunno why I would want to do 178672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * this. Maybe it becomes part of the power saving plan. 178772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 178872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 178972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (speed != DWC3_DSTS_SUPERSPEED) 179072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 179172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 179272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 179372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * RAMClkSel is reset to 0 after USB reset, so it must be reprogrammed 179472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * each time on Connect Done. 179572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 179672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!usb30_clock) 179772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 179872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 179972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_GCTL); 180072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg |= DWC3_GCTL_RAMCLKSEL(usb30_clock); 180172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_GCTL, reg); 180272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 180372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 180472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_disable_phy(struct dwc3 *dwc, u8 speed) 180572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 180672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (speed) { 180772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_SPEED_SUPER: 180872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_usb2_phy_power(dwc, false); 180972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 181072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_SPEED_HIGH: 181172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_SPEED_FULL: 181272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case USB_SPEED_LOW: 181372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_usb3_phy_power(dwc, false); 181472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 181572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 181672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 181772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 181872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_conndone_interrupt(struct dwc3 *dwc) 181972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 182072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_gadget_ep_cmd_params params; 182172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_ep *dep; 182272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 182372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 182472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u8 speed; 182572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 182672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s\n", __func__); 182772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 182872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memset(¶ms, 0x00, sizeof(params)); 182972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 183072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DSTS); 183172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi speed = reg & DWC3_DSTS_CONNECTSPD; 183272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->speed = speed; 183372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 183472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_update_ram_clk_sel(dwc, speed); 183572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 183672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (speed) { 183772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DCFG_SUPERSPEED: 183872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(512); 183972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ep0->maxpacket = 512; 184072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_SUPER; 184172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 184272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DCFG_HIGHSPEED: 184372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(64); 184472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ep0->maxpacket = 64; 184572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_HIGH; 184672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 184772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DCFG_FULLSPEED2: 184872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DCFG_FULLSPEED1: 184972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(64); 185072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ep0->maxpacket = 64; 185172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_FULL; 185272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 185372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DCFG_LOWSPEED: 185472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(8); 185572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ep0->maxpacket = 8; 185672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_LOW; 185772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 185872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 185972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 186072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* Disable unneded PHY */ 186172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_disable_phy(dwc, dwc->gadget.speed); 186272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 186372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[0]; 186472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc); 186572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 186672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to enable %s\n", dep->name); 186772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 186872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 186972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 187072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dep = dwc->eps[1]; 187172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc); 187272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 187372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to enable %s\n", dep->name); 187472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return; 187572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 187672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 187772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 187872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Configure PHY via GUSB3PIPECTLn if required. 187972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 188072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Update GTXFIFOSIZn 188172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 188272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * In both cases reset values should be sufficient. 188372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 188472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 188572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 188672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_wakeup_interrupt(struct dwc3 *dwc) 188772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 188872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "%s\n", __func__); 188972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 189072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 189172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * TODO take core out of low power mode when that's 189272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * implemented. 189372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 189472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 189572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget_driver->resume(&dwc->gadget); 189672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 189772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 189872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_linksts_change_interrupt(struct dwc3 *dwc, 189972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi unsigned int evtinfo) 190072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 190172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* The fith bit says SuperSpeed yes or no. */ 190272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->link_state = evtinfo & DWC3_LINK_STATE_MASK; 1903019ac83252dc2b356cb0ca81c25a077ec90309e7Felipe Balbi 1904019ac83252dc2b356cb0ca81c25a077ec90309e7Felipe Balbi dev_vdbg(dwc->dev, "%s link %d\n", __func__, dwc->link_state); 190572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 190672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 190772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_gadget_interrupt(struct dwc3 *dwc, 190872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const struct dwc3_event_devt *event) 190972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 191072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (event->type) { 191172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_DISCONNECT: 191272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_disconnect_interrupt(dwc); 191372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 191472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_RESET: 191572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_reset_interrupt(dwc); 191672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 191772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_CONNECT_DONE: 191872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_conndone_interrupt(dwc); 191972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 192072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_WAKEUP: 192172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_wakeup_interrupt(dwc); 192272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 192372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_LINK_STATUS_CHANGE: 192472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_linksts_change_interrupt(dwc, event->event_info); 192572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 192672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_EOPF: 192772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "End of Periodic Frame\n"); 192872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 192972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_SOF: 193072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "Start of Periodic Frame\n"); 193172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 193272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_ERRATIC_ERROR: 193372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "Erratic Error\n"); 193472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 193572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_CMD_CMPL: 193672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "Command Complete\n"); 193772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 193872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_DEVICE_EVENT_OVERFLOW: 193972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_vdbg(dwc->dev, "Overflow\n"); 194072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 194172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 194272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_dbg(dwc->dev, "UNKNOWN IRQ %d\n", event->type); 194372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 194472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 194572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 194672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic void dwc3_process_event_entry(struct dwc3 *dwc, 194772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi const union dwc3_event *event) 194872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 194972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* Endpoint IRQ, handle it and return early */ 195072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (event->type.is_devspec == 0) { 195172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* depevt */ 195272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return dwc3_endpoint_interrupt(dwc, &event->depevt); 195372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 195472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 195572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi switch (event->type.type) { 195672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi case DWC3_EVENT_TYPE_DEV: 195772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_interrupt(dwc, &event->devt); 195872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi break; 195972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* REVISIT what to do with Carkit and I2C events ? */ 196072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi default: 196172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "UNKNOWN IRQ type %d\n", event->raw); 196272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 196372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 196472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 196572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic irqreturn_t dwc3_process_event_buf(struct dwc3 *dwc, u32 buf) 196672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 196772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3_event_buffer *evt; 196872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int left; 196972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 count; 197072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 197172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi count = dwc3_readl(dwc->regs, DWC3_GEVNTCOUNT(buf)); 197272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi count &= DWC3_GEVNTCOUNT_MASK; 197372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!count) 197472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return IRQ_NONE; 197572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 197672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi evt = dwc->ev_buffs[buf]; 197772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi left = count; 197872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 197972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi while (left > 0) { 198072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi union dwc3_event event; 198172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 198272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi memcpy(&event.raw, (evt->buf + evt->lpos), sizeof(event.raw)); 198372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_process_event_entry(dwc, &event); 198472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 198572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * XXX we wrap around correctly to the next entry as almost all 198672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * entries are 4 bytes in size. There is one entry which has 12 198772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * bytes which is a regular entry followed by 8 bytes data. ATM 198872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * I don't know how things are organized if were get next to the 198972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * a boundary so I worry about that once we try to handle that. 199072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 199172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi evt->lpos = (evt->lpos + 4) % DWC3_EVENT_BUFFERS_SIZE; 199272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi left -= 4; 199372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 199472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_GEVNTCOUNT(buf), 4); 199572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 199672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 199772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return IRQ_HANDLED; 199872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 199972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 200072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbistatic irqreturn_t dwc3_interrupt(int irq, void *_dwc) 200172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 200272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi struct dwc3 *dwc = _dwc; 200372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int i; 200472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi irqreturn_t ret = IRQ_NONE; 200572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 200672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_lock(&dwc->lock); 200772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 200872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi for (i = 0; i < DWC3_EVENT_BUFFERS_NUM; i++) { 200972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi irqreturn_t status; 201072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 201172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi status = dwc3_process_event_buf(dwc, i); 201272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (status == IRQ_HANDLED) 201372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = status; 201472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 201572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 201672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi spin_unlock(&dwc->lock); 201772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 201872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 201972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 202072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 202172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi/** 202272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * dwc3_gadget_init - Initializes gadget related registers 202372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * @dwc: Pointer to out controller context structure 202472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * 202572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * Returns 0 on success otherwise negative errno. 202672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 202772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbiint __devinit dwc3_gadget_init(struct dwc3 *dwc) 202872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 202972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi u32 reg; 203072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int ret; 203172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int irq; 203272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 203372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ctrl_req = dma_alloc_coherent(dwc->dev, sizeof(*dwc->ctrl_req), 203472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi &dwc->ctrl_req_addr, GFP_KERNEL); 203572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dwc->ctrl_req) { 203672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to allocate ctrl request\n"); 203772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -ENOMEM; 203872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto err0; 203972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 204072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 204172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ep0_trb = dma_alloc_coherent(dwc->dev, sizeof(*dwc->ep0_trb), 204272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi &dwc->ep0_trb_addr, GFP_KERNEL); 204372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dwc->ep0_trb) { 204472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to allocate ep0 trb\n"); 204572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -ENOMEM; 204672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto err1; 204772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 204872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 204972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->setup_buf = dma_alloc_coherent(dwc->dev, 205072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi sizeof(*dwc->setup_buf) * 2, 205172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi &dwc->setup_buf_addr, GFP_KERNEL); 205272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (!dwc->setup_buf) { 205372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to allocate setup buffer\n"); 205472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = -ENOMEM; 205572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi goto err2; 205672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 205772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 20585812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi dwc->ep0_bounce = dma_alloc_coherent(dwc->dev, 20595812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi 512, &dwc->ep0_bounce_addr, GFP_KERNEL); 20605812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi if (!dwc->ep0_bounce) { 20615812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi dev_err(dwc->dev, "failed to allocate ep0 bounce buffer\n"); 20625812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi ret = -ENOMEM; 20635812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi goto err3; 20645812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi } 20655812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi 206672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_set_name(&dwc->gadget.dev, "gadget"); 206772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 206872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.ops = &dwc3_gadget_ops; 2069d327ab5b6d660d6fe22b073b743fde1668e593bbMichal Nazarewicz dwc->gadget.max_speed = USB_SPEED_SUPER; 207072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.speed = USB_SPEED_UNKNOWN; 207172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.dev.parent = dwc->dev; 2072eeb720fb21d61dfc3aac780e721150998ef603afFelipe Balbi dwc->gadget.sg_supported = true; 207372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 207472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_set_coherent_mask(&dwc->gadget.dev, dwc->dev->coherent_dma_mask); 207572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 207672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.dev.dma_parms = dwc->dev->dma_parms; 207772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.dev.dma_mask = dwc->dev->dma_mask; 207872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.dev.release = dwc3_gadget_release; 207972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->gadget.name = "dwc3-gadget"; 208072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 208172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* 208272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * REVISIT: Here we should clear all pending IRQs to be 208372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi * sure we're starting from a well known location. 208472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi */ 208572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 208672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = dwc3_gadget_init_endpoints(dwc); 208772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) 20885812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi goto err4; 208972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 209072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi irq = platform_get_irq(to_platform_device(dwc->dev), 0); 209172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 209272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = request_irq(irq, dwc3_interrupt, IRQF_SHARED, 209372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi "dwc3", dwc); 209472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 209572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to request irq #%d --> %d\n", 209672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi irq, ret); 20975812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi goto err5; 209872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 209972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 210072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi /* Enable all but Start and End of Frame IRQs */ 210172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi reg = (DWC3_DEVTEN_VNDRDEVTSTRCVEDEN | 210272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEVTEN_EVNTOVERFLOWEN | 210372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEVTEN_CMDCMPLTEN | 210472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEVTEN_ERRTICERREN | 210572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEVTEN_WKUPEVTEN | 210672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEVTEN_ULSTCNGEN | 210772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEVTEN_CONNECTDONEEN | 210872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEVTEN_USBRSTEN | 210972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi DWC3_DEVTEN_DISCONNEVTEN); 211072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEVTEN, reg); 211172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 211272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = device_register(&dwc->gadget.dev); 211372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 211472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to register gadget device\n"); 211572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi put_device(&dwc->gadget.dev); 21165812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi goto err6; 211772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 211872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 211972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi ret = usb_add_gadget_udc(dwc->dev, &dwc->gadget); 212072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi if (ret) { 212172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dev_err(dwc->dev, "failed to register udc\n"); 21225812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi goto err7; 212372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi } 212472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 212572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return 0; 212672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 21275812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbierr7: 212872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi device_unregister(&dwc->gadget.dev); 212972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 21305812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbierr6: 213172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEVTEN, 0x00); 213272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi free_irq(irq, dwc); 213372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 21345812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbierr5: 213572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_free_endpoints(dwc); 213672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 21375812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbierr4: 21385812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi dma_free_coherent(dwc->dev, 512, dwc->ep0_bounce, 21395812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi dwc->ep0_bounce_addr); 21405812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi 214172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbierr3: 214272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(*dwc->setup_buf) * 2, 214372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->setup_buf, dwc->setup_buf_addr); 214472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 214572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbierr2: 214672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(*dwc->ep0_trb), 214772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ep0_trb, dwc->ep0_trb_addr); 214872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 214972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbierr1: 215072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(*dwc->ctrl_req), 215172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ctrl_req, dwc->ctrl_req_addr); 215272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 215372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbierr0: 215472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi return ret; 215572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 215672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 215772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbivoid dwc3_gadget_exit(struct dwc3 *dwc) 215872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi{ 215972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int irq; 216072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi int i; 216172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 216272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi usb_del_gadget_udc(&dwc->gadget); 216372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi irq = platform_get_irq(to_platform_device(dwc->dev), 0); 216472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 216572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_writel(dwc->regs, DWC3_DEVTEN, 0x00); 216672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi free_irq(irq, dwc); 216772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 216872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi for (i = 0; i < ARRAY_SIZE(dwc->eps); i++) 216972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi __dwc3_gadget_ep_disable(dwc->eps[i]); 217072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 217172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc3_gadget_free_endpoints(dwc); 217272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 21735812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi dma_free_coherent(dwc->dev, 512, dwc->ep0_bounce, 21745812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi dwc->ep0_bounce_addr); 21755812b1c236774ea580b6af39411eb4f7297d7623Felipe Balbi 217672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(*dwc->setup_buf) * 2, 217772246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->setup_buf, dwc->setup_buf_addr); 217872246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 217972246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(*dwc->ep0_trb), 218072246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ep0_trb, dwc->ep0_trb_addr); 218172246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 218272246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dma_free_coherent(dwc->dev, sizeof(*dwc->ctrl_req), 218372246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi dwc->ctrl_req, dwc->ctrl_req_addr); 218472246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi 218572246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi device_unregister(&dwc->gadget.dev); 218672246da40f3719af3bfd104a2365b32537c27d83Felipe Balbi} 2187