+++ /dev/null
-/*
- * driver/usb/gadget/imx_udc.c
- *
- * Copyright (C) 2005 Mike Lee <eemike@gmail.com>
- * Copyright (C) 2008 Darius Augulis <augulis.darius@gmail.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- */
-
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/platform_device.h>
-#include <linux/module.h>
-#include <linux/errno.h>
-#include <linux/list.h>
-#include <linux/interrupt.h>
-#include <linux/io.h>
-#include <linux/irq.h>
-#include <linux/device.h>
-#include <linux/dma-mapping.h>
-#include <linux/clk.h>
-#include <linux/delay.h>
-#include <linux/timer.h>
-#include <linux/slab.h>
-#include <linux/prefetch.h>
-
-#include <linux/usb/ch9.h>
-#include <linux/usb/gadget.h>
-
-#include <linux/platform_data/usb-imx_udc.h>
-#include <mach/hardware.h>
-
-#include "imx_udc.h"
-
-static const char driver_name[] = "imx_udc";
-static const char ep0name[] = "ep0";
-
-void ep0_chg_stat(const char *label, struct imx_udc_struct *imx_usb,
- enum ep0_state stat);
-
-/*******************************************************************************
- * IMX UDC hardware related functions
- *******************************************************************************
- */
-
-void imx_udc_enable(struct imx_udc_struct *imx_usb)
-{
- int temp = __raw_readl(imx_usb->base + USB_CTRL);
- __raw_writel(temp | CTRL_FE_ENA | CTRL_AFE_ENA,
- imx_usb->base + USB_CTRL);
- imx_usb->gadget.speed = USB_SPEED_FULL;
-}
-
-void imx_udc_disable(struct imx_udc_struct *imx_usb)
-{
- int temp = __raw_readl(imx_usb->base + USB_CTRL);
-
- __raw_writel(temp & ~(CTRL_FE_ENA | CTRL_AFE_ENA),
- imx_usb->base + USB_CTRL);
-
- ep0_chg_stat(__func__, imx_usb, EP0_IDLE);
- imx_usb->gadget.speed = USB_SPEED_UNKNOWN;
-}
-
-void imx_udc_reset(struct imx_udc_struct *imx_usb)
-{
- int temp = __raw_readl(imx_usb->base + USB_ENAB);
-
- /* set RST bit */
- __raw_writel(temp | ENAB_RST, imx_usb->base + USB_ENAB);
-
- /* wait RST bit to clear */
- do {} while (__raw_readl(imx_usb->base + USB_ENAB) & ENAB_RST);
-
- /* wait CFG bit to assert */
- do {} while (!(__raw_readl(imx_usb->base + USB_DADR) & DADR_CFG));
-
- /* udc module is now ready */
-}
-
-void imx_udc_config(struct imx_udc_struct *imx_usb)
-{
- u8 ep_conf[5];
- u8 i, j, cfg;
- struct imx_ep_struct *imx_ep;
-
- /* wait CFG bit to assert */
- do {} while (!(__raw_readl(imx_usb->base + USB_DADR) & DADR_CFG));
-
- /* Download the endpoint buffer for endpoint 0. */
- for (j = 0; j < 5; j++) {
- i = (j == 2 ? imx_usb->imx_ep[0].fifosize : 0x00);
- __raw_writeb(i, imx_usb->base + USB_DDAT);
- do {} while (__raw_readl(imx_usb->base + USB_DADR) & DADR_BSY);
- }
-
- /* Download the endpoint buffers for endpoints 1-5.
- * We specify two configurations, one interface
- */
- for (cfg = 1; cfg < 3; cfg++) {
- for (i = 1; i < IMX_USB_NB_EP; i++) {
- imx_ep = &imx_usb->imx_ep[i];
- /* EP no | Config no */
- ep_conf[0] = (i << 4) | (cfg << 2);
- /* Type | Direction */
- ep_conf[1] = (imx_ep->bmAttributes << 3) |
- (EP_DIR(imx_ep) << 2);
- /* Max packet size */
- ep_conf[2] = imx_ep->fifosize;
- /* TRXTYP */
- ep_conf[3] = 0xC0;
- /* FIFO no */
- ep_conf[4] = i;
-
- D_INI(imx_usb->dev,
- "<%s> ep%d_conf[%d]:"
- "[%02x-%02x-%02x-%02x-%02x]\n",
- __func__, i, cfg,
- ep_conf[0], ep_conf[1], ep_conf[2],
- ep_conf[3], ep_conf[4]);
-
- for (j = 0; j < 5; j++) {
- __raw_writeb(ep_conf[j],
- imx_usb->base + USB_DDAT);
- do {} while (__raw_readl(imx_usb->base
- + USB_DADR)
- & DADR_BSY);
- }
- }
- }
-
- /* wait CFG bit to clear */
- do {} while (__raw_readl(imx_usb->base + USB_DADR) & DADR_CFG);
-}
-
-void imx_udc_init_irq(struct imx_udc_struct *imx_usb)
-{
- int i;
-
- /* Mask and clear all irqs */
- __raw_writel(0xFFFFFFFF, imx_usb->base + USB_MASK);
- __raw_writel(0xFFFFFFFF, imx_usb->base + USB_INTR);
- for (i = 0; i < IMX_USB_NB_EP; i++) {
- __raw_writel(0x1FF, imx_usb->base + USB_EP_MASK(i));
- __raw_writel(0x1FF, imx_usb->base + USB_EP_INTR(i));
- }
-
- /* Enable USB irqs */
- __raw_writel(INTR_MSOF | INTR_FRAME_MATCH, imx_usb->base + USB_MASK);
-
- /* Enable EP0 irqs */
- __raw_writel(0x1FF & ~(EPINTR_DEVREQ | EPINTR_MDEVREQ | EPINTR_EOT
- | EPINTR_EOF | EPINTR_FIFO_EMPTY | EPINTR_FIFO_FULL),
- imx_usb->base + USB_EP_MASK(0));
-}
-
-void imx_udc_init_ep(struct imx_udc_struct *imx_usb)
-{
- int i, max, temp;
- struct imx_ep_struct *imx_ep;
- for (i = 0; i < IMX_USB_NB_EP; i++) {
- imx_ep = &imx_usb->imx_ep[i];
- switch (imx_ep->fifosize) {
- case 8:
- max = 0;
- break;
- case 16:
- max = 1;
- break;
- case 32:
- max = 2;
- break;
- case 64:
- max = 3;
- break;
- default:
- max = 1;
- break;
- }
- temp = (EP_DIR(imx_ep) << 7) | (max << 5)
- | (imx_ep->bmAttributes << 3);
- __raw_writel(temp, imx_usb->base + USB_EP_STAT(i));
- __raw_writel(temp | EPSTAT_FLUSH,
- imx_usb->base + USB_EP_STAT(i));
- D_INI(imx_usb->dev, "<%s> ep%d_stat %08x\n", __func__, i,
- __raw_readl(imx_usb->base + USB_EP_STAT(i)));
- }
-}
-
-void imx_udc_init_fifo(struct imx_udc_struct *imx_usb)
-{
- int i, temp;
- struct imx_ep_struct *imx_ep;
- for (i = 0; i < IMX_USB_NB_EP; i++) {
- imx_ep = &imx_usb->imx_ep[i];
-
- /* Fifo control */
- temp = EP_DIR(imx_ep) ? 0x0B000000 : 0x0F000000;
- __raw_writel(temp, imx_usb->base + USB_EP_FCTRL(i));
- D_INI(imx_usb->dev, "<%s> ep%d_fctrl %08x\n", __func__, i,
- __raw_readl(imx_usb->base + USB_EP_FCTRL(i)));
-
- /* Fifo alarm */
- temp = (i ? imx_ep->fifosize / 2 : 0);
- __raw_writel(temp, imx_usb->base + USB_EP_FALRM(i));
- D_INI(imx_usb->dev, "<%s> ep%d_falrm %08x\n", __func__, i,
- __raw_readl(imx_usb->base + USB_EP_FALRM(i)));
- }
-}
-
-static void imx_udc_init(struct imx_udc_struct *imx_usb)
-{
- /* Reset UDC */
- imx_udc_reset(imx_usb);
-
- /* Download config to enpoint buffer */
- imx_udc_config(imx_usb);
-
- /* Setup interrups */
- imx_udc_init_irq(imx_usb);
-
- /* Setup endpoints */
- imx_udc_init_ep(imx_usb);
-
- /* Setup fifos */
- imx_udc_init_fifo(imx_usb);
-}
-
-void imx_ep_irq_enable(struct imx_ep_struct *imx_ep)
-{
-
- int i = EP_NO(imx_ep);
-
- __raw_writel(0x1FF, imx_ep->imx_usb->base + USB_EP_MASK(i));
- __raw_writel(0x1FF, imx_ep->imx_usb->base + USB_EP_INTR(i));
- __raw_writel(0x1FF & ~(EPINTR_EOT | EPINTR_EOF),
- imx_ep->imx_usb->base + USB_EP_MASK(i));
-}
-
-void imx_ep_irq_disable(struct imx_ep_struct *imx_ep)
-{
-
- int i = EP_NO(imx_ep);
-
- __raw_writel(0x1FF, imx_ep->imx_usb->base + USB_EP_MASK(i));
- __raw_writel(0x1FF, imx_ep->imx_usb->base + USB_EP_INTR(i));
-}
-
-int imx_ep_empty(struct imx_ep_struct *imx_ep)
-{
- struct imx_udc_struct *imx_usb = imx_ep->imx_usb;
-
- return __raw_readl(imx_usb->base + USB_EP_FSTAT(EP_NO(imx_ep)))
- & FSTAT_EMPTY;
-}
-
-unsigned imx_fifo_bcount(struct imx_ep_struct *imx_ep)
-{
- struct imx_udc_struct *imx_usb = imx_ep->imx_usb;
-
- return (__raw_readl(imx_usb->base + USB_EP_STAT(EP_NO(imx_ep)))
- & EPSTAT_BCOUNT) >> 16;
-}
-
-void imx_flush(struct imx_ep_struct *imx_ep)
-{
- struct imx_udc_struct *imx_usb = imx_ep->imx_usb;
-
- int temp = __raw_readl(imx_usb->base + USB_EP_STAT(EP_NO(imx_ep)));
- __raw_writel(temp | EPSTAT_FLUSH,
- imx_usb->base + USB_EP_STAT(EP_NO(imx_ep)));
-}
-
-void imx_ep_stall(struct imx_ep_struct *imx_ep)
-{
- struct imx_udc_struct *imx_usb = imx_ep->imx_usb;
- int temp, i;
-
- D_ERR(imx_usb->dev,
- "<%s> Forced stall on %s\n", __func__, imx_ep->ep.name);
-
- imx_flush(imx_ep);
-
- /* Special care for ep0 */
- if (!EP_NO(imx_ep)) {
- temp = __raw_readl(imx_usb->base + USB_CTRL);
- __raw_writel(temp | CTRL_CMDOVER | CTRL_CMDERROR,
- imx_usb->base + USB_CTRL);
- do { } while (__raw_readl(imx_usb->base + USB_CTRL)
- & CTRL_CMDOVER);
- temp = __raw_readl(imx_usb->base + USB_CTRL);
- __raw_writel(temp & ~CTRL_CMDERROR, imx_usb->base + USB_CTRL);
- }
- else {
- temp = __raw_readl(imx_usb->base + USB_EP_STAT(EP_NO(imx_ep)));
- __raw_writel(temp | EPSTAT_STALL,
- imx_usb->base + USB_EP_STAT(EP_NO(imx_ep)));
-
- for (i = 0; i < 100; i ++) {
- temp = __raw_readl(imx_usb->base
- + USB_EP_STAT(EP_NO(imx_ep)));
- if (!(temp & EPSTAT_STALL))
- break;
- udelay(20);
- }
- if (i == 100)
- D_ERR(imx_usb->dev, "<%s> Non finished stall on %s\n",
- __func__, imx_ep->ep.name);
- }
-}
-
-static int imx_udc_get_frame(struct usb_gadget *_gadget)
-{
- struct imx_udc_struct *imx_usb = container_of(_gadget,
- struct imx_udc_struct, gadget);
-
- return __raw_readl(imx_usb->base + USB_FRAME) & 0x7FF;
-}
-
-static int imx_udc_wakeup(struct usb_gadget *_gadget)
-{
- return 0;
-}
-
-/*******************************************************************************
- * USB request control functions
- *******************************************************************************
- */
-
-static void ep_add_request(struct imx_ep_struct *imx_ep,
- struct imx_request *req)
-{
- if (unlikely(!req))
- return;
-
- req->in_use = 1;
- list_add_tail(&req->queue, &imx_ep->queue);
-}
-
-static void ep_del_request(struct imx_ep_struct *imx_ep,
- struct imx_request *req)
-{
- if (unlikely(!req))
- return;
-
- list_del_init(&req->queue);
- req->in_use = 0;
-}
-
-static void done(struct imx_ep_struct *imx_ep,
- struct imx_request *req, int status)
-{
- ep_del_request(imx_ep, req);
-
- if (likely(req->req.status == -EINPROGRESS))
- req->req.status = status;
- else
- status = req->req.status;
-
- if (status && status != -ESHUTDOWN)
- D_ERR(imx_ep->imx_usb->dev,
- "<%s> complete %s req %p stat %d len %u/%u\n", __func__,
- imx_ep->ep.name, &req->req, status,
- req->req.actual, req->req.length);
-
- req->req.complete(&imx_ep->ep, &req->req);
-}
-
-static void nuke(struct imx_ep_struct *imx_ep, int status)
-{
- struct imx_request *req;
-
- while (!list_empty(&imx_ep->queue)) {
- req = list_entry(imx_ep->queue.next, struct imx_request, queue);
- done(imx_ep, req, status);
- }
-}
-
-/*******************************************************************************
- * Data tansfer over USB functions
- *******************************************************************************
- */
-static int read_packet(struct imx_ep_struct *imx_ep, struct imx_request *req)
-{
- u8 *buf;
- int bytes_ep, bufferspace, count, i;
-
- bytes_ep = imx_fifo_bcount(imx_ep);
- bufferspace = req->req.length - req->req.actual;
-
- buf = req->req.buf + req->req.actual;
- prefetchw(buf);
-
- if (unlikely(imx_ep_empty(imx_ep)))
- count = 0; /* zlp */
- else
- count = min(bytes_ep, bufferspace);
-
- for (i = count; i > 0; i--)
- *buf++ = __raw_readb(imx_ep->imx_usb->base
- + USB_EP_FDAT0(EP_NO(imx_ep)));
- req->req.actual += count;
-
- return count;
-}
-
-static int write_packet(struct imx_ep_struct *imx_ep, struct imx_request *req)
-{
- u8 *buf;
- int length, count, temp;
-
- if (unlikely(__raw_readl(imx_ep->imx_usb->base +
- USB_EP_STAT(EP_NO(imx_ep))) & EPSTAT_ZLPS)) {
- D_TRX(imx_ep->imx_usb->dev, "<%s> zlp still queued in EP %s\n",
- __func__, imx_ep->ep.name);
- return -1;
- }
-
- buf = req->req.buf + req->req.actual;
- prefetch(buf);
-
- length = min(req->req.length - req->req.actual, (u32)imx_ep->fifosize);
-
- if (imx_fifo_bcount(imx_ep) + length > imx_ep->fifosize) {
- D_TRX(imx_ep->imx_usb->dev, "<%s> packet overfill %s fifo\n",
- __func__, imx_ep->ep.name);
- return -1;
- }
-
- req->req.actual += length;
- count = length;
-
- if (!count && req->req.zero) { /* zlp */
- temp = __raw_readl(imx_ep->imx_usb->base
- + USB_EP_STAT(EP_NO(imx_ep)));
- __raw_writel(temp | EPSTAT_ZLPS, imx_ep->imx_usb->base
- + USB_EP_STAT(EP_NO(imx_ep)));
- D_TRX(imx_ep->imx_usb->dev, "<%s> zero packet\n", __func__);
- return 0;
- }
-
- while (count--) {
- if (count == 0) { /* last byte */
- temp = __raw_readl(imx_ep->imx_usb->base
- + USB_EP_FCTRL(EP_NO(imx_ep)));
- __raw_writel(temp | FCTRL_WFR, imx_ep->imx_usb->base
- + USB_EP_FCTRL(EP_NO(imx_ep)));
- }
- __raw_writeb(*buf++,
- imx_ep->imx_usb->base + USB_EP_FDAT0(EP_NO(imx_ep)));
- }
-
- return length;
-}
-
-static int read_fifo(struct imx_ep_struct *imx_ep, struct imx_request *req)
-{
- int bytes = 0,
- count,
- completed = 0;
-
- while (__raw_readl(imx_ep->imx_usb->base + USB_EP_FSTAT(EP_NO(imx_ep)))
- & FSTAT_FR) {
- count = read_packet(imx_ep, req);
- bytes += count;
-
- completed = (count != imx_ep->fifosize);
- if (completed || req->req.actual == req->req.length) {
- completed = 1;
- break;
- }
- }
-
- if (completed || !req->req.length) {
- done(imx_ep, req, 0);
- D_REQ(imx_ep->imx_usb->dev, "<%s> %s req<%p> %s\n",
- __func__, imx_ep->ep.name, req,
- completed ? "completed" : "not completed");
- if (!EP_NO(imx_ep))
- ep0_chg_stat(__func__, imx_ep->imx_usb, EP0_IDLE);
- }
-
- D_TRX(imx_ep->imx_usb->dev, "<%s> bytes read: %d\n", __func__, bytes);
-
- return completed;
-}
-
-static int write_fifo(struct imx_ep_struct *imx_ep, struct imx_request *req)
-{
- int bytes = 0,
- count,
- completed = 0;
-
- while (!completed) {
- count = write_packet(imx_ep, req);
- if (count < 0)
- break; /* busy */
- bytes += count;
-
- /* last packet "must be" short (or a zlp) */
- completed = (count != imx_ep->fifosize);
-
- if (unlikely(completed)) {
- done(imx_ep, req, 0);
- D_REQ(imx_ep->imx_usb->dev, "<%s> %s req<%p> %s\n",
- __func__, imx_ep->ep.name, req,
- completed ? "completed" : "not completed");
- if (!EP_NO(imx_ep))
- ep0_chg_stat(__func__,
- imx_ep->imx_usb, EP0_IDLE);
- }
- }
-
- D_TRX(imx_ep->imx_usb->dev, "<%s> bytes sent: %d\n", __func__, bytes);
-
- return completed;
-}
-
-/*******************************************************************************
- * Endpoint handlers
- *******************************************************************************
- */
-static int handle_ep(struct imx_ep_struct *imx_ep)
-{
- struct imx_request *req;
- int completed = 0;
-
- do {
- if (!list_empty(&imx_ep->queue))
- req = list_entry(imx_ep->queue.next,
- struct imx_request, queue);
- else {
- D_REQ(imx_ep->imx_usb->dev, "<%s> no request on %s\n",
- __func__, imx_ep->ep.name);
- return 0;
- }
-
- if (EP_DIR(imx_ep)) /* to host */
- completed = write_fifo(imx_ep, req);
- else /* to device */
- completed = read_fifo(imx_ep, req);
-
- dump_ep_stat(__func__, imx_ep);
-
- } while (completed);
-
- return 0;
-}
-
-static int handle_ep0(struct imx_ep_struct *imx_ep)
-{
- struct imx_request *req = NULL;
- int ret = 0;
-
- if (!list_empty(&imx_ep->queue)) {
- req = list_entry(imx_ep->queue.next, struct imx_request, queue);
-
- switch (imx_ep->imx_usb->ep0state) {
-
- case EP0_IN_DATA_PHASE: /* GET_DESCRIPTOR */
- write_fifo(imx_ep, req);
- break;
- case EP0_OUT_DATA_PHASE: /* SET_DESCRIPTOR */
- read_fifo(imx_ep, req);
- break;
- default:
- D_EP0(imx_ep->imx_usb->dev,
- "<%s> ep0 i/o, odd state %d\n",
- __func__, imx_ep->imx_usb->ep0state);
- ep_del_request(imx_ep, req);
- ret = -EL2HLT;
- break;
- }
- }
-
- else
- D_ERR(imx_ep->imx_usb->dev, "<%s> no request on %s\n",
- __func__, imx_ep->ep.name);
-
- return ret;
-}
-
-static void handle_ep0_devreq(struct imx_udc_struct *imx_usb)
-{
- struct imx_ep_struct *imx_ep = &imx_usb->imx_ep[0];
- union {
- struct usb_ctrlrequest r;
- u8 raw[8];
- u32 word[2];
- } u;
- int temp, i;
-
- nuke(imx_ep, -EPROTO);
-
- /* read SETUP packet */
- for (i = 0; i < 2; i++) {
- if (imx_ep_empty(imx_ep)) {
- D_ERR(imx_usb->dev,
- "<%s> no setup packet received\n", __func__);
- goto stall;
- }
- u.word[i] = __raw_readl(imx_usb->base
- + USB_EP_FDAT(EP_NO(imx_ep)));
- }
-
- temp = imx_ep_empty(imx_ep);
- while (!imx_ep_empty(imx_ep)) {
- i = __raw_readl(imx_usb->base + USB_EP_FDAT(EP_NO(imx_ep)));
- D_ERR(imx_usb->dev,
- "<%s> wrong to have extra bytes for setup : 0x%08x\n",
- __func__, i);
- }
- if (!temp)
- goto stall;
-
- le16_to_cpus(&u.r.wValue);
- le16_to_cpus(&u.r.wIndex);
- le16_to_cpus(&u.r.wLength);
-
- D_REQ(imx_usb->dev, "<%s> SETUP %02x.%02x v%04x i%04x l%04x\n",
- __func__, u.r.bRequestType, u.r.bRequest,
- u.r.wValue, u.r.wIndex, u.r.wLength);
-
- if (imx_usb->set_config) {
- /* NACK the host by using CMDOVER */
- temp = __raw_readl(imx_usb->base + USB_CTRL);
- __raw_writel(temp | CTRL_CMDOVER, imx_usb->base + USB_CTRL);
-
- D_ERR(imx_usb->dev,
- "<%s> set config req is pending, NACK the host\n",
- __func__);
- return;
- }
-
- if (u.r.bRequestType & USB_DIR_IN)
- ep0_chg_stat(__func__, imx_usb, EP0_IN_DATA_PHASE);
- else
- ep0_chg_stat(__func__, imx_usb, EP0_OUT_DATA_PHASE);
-
- i = imx_usb->driver->setup(&imx_usb->gadget, &u.r);
- if (i < 0) {
- D_ERR(imx_usb->dev, "<%s> device setup error %d\n",
- __func__, i);
- goto stall;
- }
-
- return;
-stall:
- D_ERR(imx_usb->dev, "<%s> protocol STALL\n", __func__);
- imx_ep_stall(imx_ep);
- ep0_chg_stat(__func__, imx_usb, EP0_STALL);
- return;
-}
-
-/*******************************************************************************
- * USB gadget callback functions
- *******************************************************************************
- */
-
-static int imx_ep_enable(struct usb_ep *usb_ep,
- const struct usb_endpoint_descriptor *desc)
-{
- struct imx_ep_struct *imx_ep = container_of(usb_ep,
- struct imx_ep_struct, ep);
- struct imx_udc_struct *imx_usb = imx_ep->imx_usb;
- unsigned long flags;
-
- if (!usb_ep
- || !desc
- || !EP_NO(imx_ep)
- || desc->bDescriptorType != USB_DT_ENDPOINT
- || imx_ep->bEndpointAddress != desc->bEndpointAddress) {
- D_ERR(imx_usb->dev,
- "<%s> bad ep or descriptor\n", __func__);
- return -EINVAL;
- }
-
- if (imx_ep->bmAttributes != desc->bmAttributes) {
- D_ERR(imx_usb->dev,
- "<%s> %s type mismatch\n", __func__, usb_ep->name);
- return -EINVAL;
- }
-
- if (imx_ep->fifosize < usb_endpoint_maxp(desc)) {
- D_ERR(imx_usb->dev,
- "<%s> bad %s maxpacket\n", __func__, usb_ep->name);
- return -ERANGE;
- }
-
- if (!imx_usb->driver || imx_usb->gadget.speed == USB_SPEED_UNKNOWN) {
- D_ERR(imx_usb->dev, "<%s> bogus device state\n", __func__);
- return -ESHUTDOWN;
- }
-
- local_irq_save(flags);
-
- imx_ep->stopped = 0;
- imx_flush(imx_ep);
- imx_ep_irq_enable(imx_ep);
-
- local_irq_restore(flags);
-
- D_EPX(imx_usb->dev, "<%s> ENABLED %s\n", __func__, usb_ep->name);
- return 0;
-}
-
-static int imx_ep_disable(struct usb_ep *usb_ep)
-{
- struct imx_ep_struct *imx_ep = container_of(usb_ep,
- struct imx_ep_struct, ep);
- unsigned long flags;
-
- if (!usb_ep || !EP_NO(imx_ep) || !list_empty(&imx_ep->queue)) {
- D_ERR(imx_ep->imx_usb->dev, "<%s> %s can not be disabled\n",
- __func__, usb_ep ? imx_ep->ep.name : NULL);
- return -EINVAL;
- }
-
- local_irq_save(flags);
-
- imx_ep->stopped = 1;
- nuke(imx_ep, -ESHUTDOWN);
- imx_flush(imx_ep);
- imx_ep_irq_disable(imx_ep);
-
- local_irq_restore(flags);
-
- D_EPX(imx_ep->imx_usb->dev,
- "<%s> DISABLED %s\n", __func__, usb_ep->name);
- return 0;
-}
-
-static struct usb_request *imx_ep_alloc_request
- (struct usb_ep *usb_ep, gfp_t gfp_flags)
-{
- struct imx_request *req;
-
- if (!usb_ep)
- return NULL;
-
- req = kzalloc(sizeof *req, gfp_flags);
- if (!req)
- return NULL;
-
- INIT_LIST_HEAD(&req->queue);
- req->in_use = 0;
-
- return &req->req;
-}
-
-static void imx_ep_free_request
- (struct usb_ep *usb_ep, struct usb_request *usb_req)
-{
- struct imx_request *req;
-
- req = container_of(usb_req, struct imx_request, req);
- WARN_ON(!list_empty(&req->queue));
- kfree(req);
-}
-
-static int imx_ep_queue
- (struct usb_ep *usb_ep, struct usb_request *usb_req, gfp_t gfp_flags)
-{
- struct imx_ep_struct *imx_ep;
- struct imx_udc_struct *imx_usb;
- struct imx_request *req;
- unsigned long flags;
- int ret = 0;
-
- imx_ep = container_of(usb_ep, struct imx_ep_struct, ep);
- imx_usb = imx_ep->imx_usb;
- req = container_of(usb_req, struct imx_request, req);
-
- /*
- Special care on IMX udc.
- Ignore enqueue when after set configuration from the
- host. This assume all gadget drivers reply set
- configuration with the next ep0 req enqueue.
- */
- if (imx_usb->set_config && !EP_NO(imx_ep)) {
- imx_usb->set_config = 0;
- D_ERR(imx_usb->dev,
- "<%s> gadget reply set config\n", __func__);
- return 0;
- }
-
- if (unlikely(!usb_req || !req || !usb_req->complete || !usb_req->buf)) {
- D_ERR(imx_usb->dev, "<%s> bad params\n", __func__);
- return -EINVAL;
- }
-
- if (unlikely(!usb_ep || !imx_ep)) {
- D_ERR(imx_usb->dev, "<%s> bad ep\n", __func__);
- return -EINVAL;
- }
-
- if (!imx_usb->driver || imx_usb->gadget.speed == USB_SPEED_UNKNOWN) {
- D_ERR(imx_usb->dev, "<%s> bogus device state\n", __func__);
- return -ESHUTDOWN;
- }
-
- /* Debug */
- D_REQ(imx_usb->dev, "<%s> ep%d %s request for [%d] bytes\n",
- __func__, EP_NO(imx_ep),
- ((!EP_NO(imx_ep) && imx_ep->imx_usb->ep0state
- == EP0_IN_DATA_PHASE)
- || (EP_NO(imx_ep) && EP_DIR(imx_ep)))
- ? "IN" : "OUT", usb_req->length);
- dump_req(__func__, imx_ep, usb_req);
-
- if (imx_ep->stopped) {
- usb_req->status = -ESHUTDOWN;
- return -ESHUTDOWN;
- }
-
- if (req->in_use) {
- D_ERR(imx_usb->dev,
- "<%s> refusing to queue req %p (already queued)\n",
- __func__, req);
- return 0;
- }
-
- local_irq_save(flags);
-
- usb_req->status = -EINPROGRESS;
- usb_req->actual = 0;
-
- ep_add_request(imx_ep, req);
-
- if (!EP_NO(imx_ep))
- ret = handle_ep0(imx_ep);
- else
- ret = handle_ep(imx_ep);
-
- local_irq_restore(flags);
- return ret;
-}
-
-static int imx_ep_dequeue(struct usb_ep *usb_ep, struct usb_request *usb_req)
-{
-
- struct imx_ep_struct *imx_ep = container_of
- (usb_ep, struct imx_ep_struct, ep);
- struct imx_request *req;
- unsigned long flags;
-
- if (unlikely(!usb_ep || !EP_NO(imx_ep))) {
- D_ERR(imx_ep->imx_usb->dev, "<%s> bad ep\n", __func__);
- return -EINVAL;
- }
-
- local_irq_save(flags);
-
- /* make sure it's actually queued on this endpoint */
- list_for_each_entry(req, &imx_ep->queue, queue) {
- if (&req->req == usb_req)
- break;
- }
- if (&req->req != usb_req) {
- local_irq_restore(flags);
- return -EINVAL;
- }
-
- done(imx_ep, req, -ECONNRESET);
-
- local_irq_restore(flags);
- return 0;
-}
-
-static int imx_ep_set_halt(struct usb_ep *usb_ep, int value)
-{
- struct imx_ep_struct *imx_ep = container_of
- (usb_ep, struct imx_ep_struct, ep);
- unsigned long flags;
-
- if (unlikely(!usb_ep || !EP_NO(imx_ep))) {
- D_ERR(imx_ep->imx_usb->dev, "<%s> bad ep\n", __func__);
- return -EINVAL;
- }
-
- local_irq_save(flags);
-
- if ((imx_ep->bEndpointAddress & USB_DIR_IN)
- && !list_empty(&imx_ep->queue)) {
- local_irq_restore(flags);
- return -EAGAIN;
- }
-
- imx_ep_stall(imx_ep);
-
- local_irq_restore(flags);
-
- D_EPX(imx_ep->imx_usb->dev, "<%s> %s halt\n", __func__, usb_ep->name);
- return 0;
-}
-
-static int imx_ep_fifo_status(struct usb_ep *usb_ep)
-{
- struct imx_ep_struct *imx_ep = container_of
- (usb_ep, struct imx_ep_struct, ep);
-
- if (!usb_ep) {
- D_ERR(imx_ep->imx_usb->dev, "<%s> bad ep\n", __func__);
- return -ENODEV;
- }
-
- if (imx_ep->imx_usb->gadget.speed == USB_SPEED_UNKNOWN)
- return 0;
- else
- return imx_fifo_bcount(imx_ep);
-}
-
-static void imx_ep_fifo_flush(struct usb_ep *usb_ep)
-{
- struct imx_ep_struct *imx_ep = container_of
- (usb_ep, struct imx_ep_struct, ep);
- unsigned long flags;
-
- local_irq_save(flags);
-
- if (!usb_ep || !EP_NO(imx_ep) || !list_empty(&imx_ep->queue)) {
- D_ERR(imx_ep->imx_usb->dev, "<%s> bad ep\n", __func__);
- local_irq_restore(flags);
- return;
- }
-
- /* toggle and halt bits stay unchanged */
- imx_flush(imx_ep);
-
- local_irq_restore(flags);
-}
-
-static struct usb_ep_ops imx_ep_ops = {
- .enable = imx_ep_enable,
- .disable = imx_ep_disable,
-
- .alloc_request = imx_ep_alloc_request,
- .free_request = imx_ep_free_request,
-
- .queue = imx_ep_queue,
- .dequeue = imx_ep_dequeue,
-
- .set_halt = imx_ep_set_halt,
- .fifo_status = imx_ep_fifo_status,
- .fifo_flush = imx_ep_fifo_flush,
-};
-
-/*******************************************************************************
- * USB endpoint control functions
- *******************************************************************************
- */
-
-void ep0_chg_stat(const char *label,
- struct imx_udc_struct *imx_usb, enum ep0_state stat)
-{
- D_EP0(imx_usb->dev, "<%s> from %15s to %15s\n",
- label, state_name[imx_usb->ep0state], state_name[stat]);
-
- if (imx_usb->ep0state == stat)
- return;
-
- imx_usb->ep0state = stat;
-}
-
-static void usb_init_data(struct imx_udc_struct *imx_usb)
-{
- struct imx_ep_struct *imx_ep;
- u8 i;
-
- /* device/ep0 records init */
- INIT_LIST_HEAD(&imx_usb->gadget.ep_list);
- INIT_LIST_HEAD(&imx_usb->gadget.ep0->ep_list);
- ep0_chg_stat(__func__, imx_usb, EP0_IDLE);
-
- /* basic endpoint records init */
- for (i = 0; i < IMX_USB_NB_EP; i++) {
- imx_ep = &imx_usb->imx_ep[i];
-
- if (i) {
- list_add_tail(&imx_ep->ep.ep_list,
- &imx_usb->gadget.ep_list);
- imx_ep->stopped = 1;
- } else
- imx_ep->stopped = 0;
-
- INIT_LIST_HEAD(&imx_ep->queue);
- }
-}
-
-static void udc_stop_activity(struct imx_udc_struct *imx_usb,
- struct usb_gadget_driver *driver)
-{
- struct imx_ep_struct *imx_ep;
- int i;
-
- if (imx_usb->gadget.speed == USB_SPEED_UNKNOWN)
- driver = NULL;
-
- /* prevent new request submissions, kill any outstanding requests */
- for (i = 1; i < IMX_USB_NB_EP; i++) {
- imx_ep = &imx_usb->imx_ep[i];
- imx_flush(imx_ep);
- imx_ep->stopped = 1;
- imx_ep_irq_disable(imx_ep);
- nuke(imx_ep, -ESHUTDOWN);
- }
-
- imx_usb->cfg = 0;
- imx_usb->intf = 0;
- imx_usb->alt = 0;
-
- if (driver)
- driver->disconnect(&imx_usb->gadget);
-}
-
-/*******************************************************************************
- * Interrupt handlers
- *******************************************************************************
- */
-
-/*
- * Called when timer expires.
- * Timer is started when CFG_CHG is received.
- */
-static void handle_config(unsigned long data)
-{
- struct imx_udc_struct *imx_usb = (void *)data;
- struct usb_ctrlrequest u;
- int temp, cfg, intf, alt;
-
- local_irq_disable();
-
- temp = __raw_readl(imx_usb->base + USB_STAT);
- cfg = (temp & STAT_CFG) >> 5;
- intf = (temp & STAT_INTF) >> 3;
- alt = temp & STAT_ALTSET;
-
- D_REQ(imx_usb->dev,
- "<%s> orig config C=%d, I=%d, A=%d / "
- "req config C=%d, I=%d, A=%d\n",
- __func__, imx_usb->cfg, imx_usb->intf, imx_usb->alt,
- cfg, intf, alt);
-
- if (cfg == 1 || cfg == 2) {
-
- if (imx_usb->cfg != cfg) {
- u.bRequest = USB_REQ_SET_CONFIGURATION;
- u.bRequestType = USB_DIR_OUT |
- USB_TYPE_STANDARD |
- USB_RECIP_DEVICE;
- u.wValue = cfg;
- u.wIndex = 0;
- u.wLength = 0;
- imx_usb->cfg = cfg;
- imx_usb->driver->setup(&imx_usb->gadget, &u);
-
- }
- if (imx_usb->intf != intf || imx_usb->alt != alt) {
- u.bRequest = USB_REQ_SET_INTERFACE;
- u.bRequestType = USB_DIR_OUT |
- USB_TYPE_STANDARD |
- USB_RECIP_INTERFACE;
- u.wValue = alt;
- u.wIndex = intf;
- u.wLength = 0;
- imx_usb->intf = intf;
- imx_usb->alt = alt;
- imx_usb->driver->setup(&imx_usb->gadget, &u);
- }
- }
-
- imx_usb->set_config = 0;
-
- local_irq_enable();
-}
-
-static irqreturn_t imx_udc_irq(int irq, void *dev)
-{
- struct imx_udc_struct *imx_usb = dev;
- int intr = __raw_readl(imx_usb->base + USB_INTR);
- int temp;
-
- if (intr & (INTR_WAKEUP | INTR_SUSPEND | INTR_RESUME | INTR_RESET_START
- | INTR_RESET_STOP | INTR_CFG_CHG)) {
- dump_intr(__func__, intr, imx_usb->dev);
- dump_usb_stat(__func__, imx_usb);
- }
-
- if (!imx_usb->driver)
- goto end_irq;
-
- if (intr & INTR_SOF) {
- /* Copy from Freescale BSP.
- We must enable SOF intr and set CMDOVER.
- Datasheet don't specifiy this action, but it
- is done in Freescale BSP, so just copy it.
- */
- if (imx_usb->ep0state == EP0_IDLE) {
- temp = __raw_readl(imx_usb->base + USB_CTRL);
- __raw_writel(temp | CTRL_CMDOVER,
- imx_usb->base + USB_CTRL);
- }
- }
-
- if (intr & INTR_CFG_CHG) {
- /* A workaround of serious IMX UDC bug.
- Handling of CFG_CHG should be delayed for some time, because
- IMX does not NACK the host when CFG_CHG interrupt is pending.
- There is no time to handle current CFG_CHG
- if next CFG_CHG or SETUP packed is send immediately.
- We have to clear CFG_CHG, start the timer and
- NACK the host by setting CTRL_CMDOVER
- if it sends any SETUP packet.
- When timer expires, handler is called to handle configuration
- changes. While CFG_CHG is not handled (set_config=1),
- we must NACK the host to every SETUP packed.
- This delay prevents from going out of sync with host.
- */
- __raw_writel(INTR_CFG_CHG, imx_usb->base + USB_INTR);
- imx_usb->set_config = 1;
- mod_timer(&imx_usb->timer, jiffies + 5);
- goto end_irq;
- }
-
- if (intr & INTR_WAKEUP) {
- if (imx_usb->gadget.speed == USB_SPEED_UNKNOWN
- && imx_usb->driver && imx_usb->driver->resume)
- imx_usb->driver->resume(&imx_usb->gadget);
- imx_usb->set_config = 0;
- del_timer(&imx_usb->timer);
- imx_usb->gadget.speed = USB_SPEED_FULL;
- }
-
- if (intr & INTR_SUSPEND) {
- if (imx_usb->gadget.speed != USB_SPEED_UNKNOWN
- && imx_usb->driver && imx_usb->driver->suspend)
- imx_usb->driver->suspend(&imx_usb->gadget);
- imx_usb->set_config = 0;
- del_timer(&imx_usb->timer);
- imx_usb->gadget.speed = USB_SPEED_UNKNOWN;
- }
-
- if (intr & INTR_RESET_START) {
- __raw_writel(intr, imx_usb->base + USB_INTR);
- udc_stop_activity(imx_usb, imx_usb->driver);
- imx_usb->set_config = 0;
- del_timer(&imx_usb->timer);
- imx_usb->gadget.speed = USB_SPEED_UNKNOWN;
- }
-
- if (intr & INTR_RESET_STOP)
- imx_usb->gadget.speed = USB_SPEED_FULL;
-
-end_irq:
- __raw_writel(intr, imx_usb->base + USB_INTR);
- return IRQ_HANDLED;
-}
-
-static irqreturn_t imx_udc_ctrl_irq(int irq, void *dev)
-{
- struct imx_udc_struct *imx_usb = dev;
- struct imx_ep_struct *imx_ep = &imx_usb->imx_ep[0];
- int intr = __raw_readl(imx_usb->base + USB_EP_INTR(0));
-
- dump_ep_intr(__func__, 0, intr, imx_usb->dev);
-
- if (!imx_usb->driver) {
- __raw_writel(intr, imx_usb->base + USB_EP_INTR(0));
- return IRQ_HANDLED;
- }
-
- /* DEVREQ has highest priority */
- if (intr & (EPINTR_DEVREQ | EPINTR_MDEVREQ))
- handle_ep0_devreq(imx_usb);
- /* Seem i.MX is missing EOF interrupt sometimes.
- * Therefore we don't monitor EOF.
- * We call handle_ep0() only if a request is queued for ep0.
- */
- else if (!list_empty(&imx_ep->queue))
- handle_ep0(imx_ep);
-
- __raw_writel(intr, imx_usb->base + USB_EP_INTR(0));
-
- return IRQ_HANDLED;
-}
-
-#ifndef MX1_INT_USBD0
-#define MX1_INT_USBD0 MX1_USBD_INT0
-#endif
-
-static irqreturn_t imx_udc_bulk_irq(int irq, void *dev)
-{
- struct imx_udc_struct *imx_usb = dev;
- struct imx_ep_struct *imx_ep = &imx_usb->imx_ep[irq - MX1_INT_USBD0];
- int intr = __raw_readl(imx_usb->base + USB_EP_INTR(EP_NO(imx_ep)));
-
- dump_ep_intr(__func__, irq - MX1_INT_USBD0, intr, imx_usb->dev);
-
- if (!imx_usb->driver) {
- __raw_writel(intr, imx_usb->base + USB_EP_INTR(EP_NO(imx_ep)));
- return IRQ_HANDLED;
- }
-
- handle_ep(imx_ep);
-
- __raw_writel(intr, imx_usb->base + USB_EP_INTR(EP_NO(imx_ep)));
-
- return IRQ_HANDLED;
-}
-
-irq_handler_t intr_handler(int i)
-{
- switch (i) {
- case 0:
- return imx_udc_ctrl_irq;
- case 1:
- case 2:
- case 3:
- case 4:
- case 5:
- return imx_udc_bulk_irq;
- default:
- return imx_udc_irq;
- }
-}
-
-/*******************************************************************************
- * Static defined IMX UDC structure
- *******************************************************************************
- */
-
-static int imx_udc_start(struct usb_gadget *gadget,
- struct usb_gadget_driver *driver);
-static int imx_udc_stop(struct usb_gadget *gadget,
- struct usb_gadget_driver *driver);
-static const struct usb_gadget_ops imx_udc_ops = {
- .get_frame = imx_udc_get_frame,
- .wakeup = imx_udc_wakeup,
- .udc_start = imx_udc_start,
- .udc_stop = imx_udc_stop,
-};
-
-static struct imx_udc_struct controller = {
- .gadget = {
- .ops = &imx_udc_ops,
- .ep0 = &controller.imx_ep[0].ep,
- .name = driver_name,
- .dev = {
- .init_name = "gadget",
- },
- },
-
- .imx_ep[0] = {
- .ep = {
- .name = ep0name,
- .ops = &imx_ep_ops,
- .maxpacket = 32,
- },
- .imx_usb = &controller,
- .fifosize = 32,
- .bEndpointAddress = 0,
- .bmAttributes = USB_ENDPOINT_XFER_CONTROL,
- },
- .imx_ep[1] = {
- .ep = {
- .name = "ep1in-bulk",
- .ops = &imx_ep_ops,
- .maxpacket = 64,
- },
- .imx_usb = &controller,
- .fifosize = 64,
- .bEndpointAddress = USB_DIR_IN | 1,
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
- },
- .imx_ep[2] = {
- .ep = {
- .name = "ep2out-bulk",
- .ops = &imx_ep_ops,
- .maxpacket = 64,
- },
- .imx_usb = &controller,
- .fifosize = 64,
- .bEndpointAddress = USB_DIR_OUT | 2,
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
- },
- .imx_ep[3] = {
- .ep = {
- .name = "ep3out-bulk",
- .ops = &imx_ep_ops,
- .maxpacket = 32,
- },
- .imx_usb = &controller,
- .fifosize = 32,
- .bEndpointAddress = USB_DIR_OUT | 3,
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
- },
- .imx_ep[4] = {
- .ep = {
- .name = "ep4in-int",
- .ops = &imx_ep_ops,
- .maxpacket = 32,
- },
- .imx_usb = &controller,
- .fifosize = 32,
- .bEndpointAddress = USB_DIR_IN | 4,
- .bmAttributes = USB_ENDPOINT_XFER_INT,
- },
- .imx_ep[5] = {
- .ep = {
- .name = "ep5out-int",
- .ops = &imx_ep_ops,
- .maxpacket = 32,
- },
- .imx_usb = &controller,
- .fifosize = 32,
- .bEndpointAddress = USB_DIR_OUT | 5,
- .bmAttributes = USB_ENDPOINT_XFER_INT,
- },
-};
-
-/*******************************************************************************
- * USB gadget driver functions
- *******************************************************************************
- */
-static int imx_udc_start(struct usb_gadget *gadget,
- struct usb_gadget_driver *driver)
-{
- struct imx_udc_struct *imx_usb;
-
- imx_usb = container_of(gadget, struct imx_udc_struct, gadget);
- /* first hook up the driver ... */
- imx_usb->driver = driver;
-
- D_INI(imx_usb->dev, "<%s> registered gadget driver '%s'\n",
- __func__, driver->driver.name);
-
- imx_udc_enable(imx_usb);
-
- return 0;
-}
-
-static int imx_udc_stop(struct usb_gadget *gadget,
- struct usb_gadget_driver *driver)
-{
- struct imx_udc_struct *imx_usb = container_of(gadget,
- struct imx_udc_struct, gadget);
-
- udc_stop_activity(imx_usb, driver);
- imx_udc_disable(imx_usb);
- del_timer(&imx_usb->timer);
-
- imx_usb->driver = NULL;
-
- D_INI(imx_usb->dev, "<%s> unregistered gadget driver '%s'\n",
- __func__, driver->driver.name);
-
- return 0;
-}
-
-/*******************************************************************************
- * Module functions
- *******************************************************************************
- */
-
-static int __init imx_udc_probe(struct platform_device *pdev)
-{
- struct imx_udc_struct *imx_usb = &controller;
- struct resource *res;
- struct imxusb_platform_data *pdata;
- struct clk *clk;
- void __iomem *base;
- int ret = 0;
- int i;
- resource_size_t res_size;
-
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!res) {
- dev_err(&pdev->dev, "can't get device resources\n");
- return -ENODEV;
- }
-
- pdata = pdev->dev.platform_data;
- if (!pdata) {
- dev_err(&pdev->dev, "driver needs platform data\n");
- return -ENODEV;
- }
-
- res_size = resource_size(res);
- if (!request_mem_region(res->start, res_size, res->name)) {
- dev_err(&pdev->dev, "can't allocate %d bytes at %d address\n",
- res_size, res->start);
- return -ENOMEM;
- }
-
- if (pdata->init) {
- ret = pdata->init(&pdev->dev);
- if (ret)
- goto fail0;
- }
-
- base = ioremap(res->start, res_size);
- if (!base) {
- dev_err(&pdev->dev, "ioremap failed\n");
- ret = -EIO;
- goto fail1;
- }
-
- clk = clk_get(NULL, "usbd_clk");
- if (IS_ERR(clk)) {
- ret = PTR_ERR(clk);
- dev_err(&pdev->dev, "can't get USB clock\n");
- goto fail2;
- }
- clk_prepare_enable(clk);
-
- if (clk_get_rate(clk) != 48000000) {
- D_INI(&pdev->dev,
- "Bad USB clock (%d Hz), changing to 48000000 Hz\n",
- (int)clk_get_rate(clk));
- if (clk_set_rate(clk, 48000000)) {
- dev_err(&pdev->dev,
- "Unable to set correct USB clock (48MHz)\n");
- ret = -EIO;
- goto fail3;
- }
- }
-
- for (i = 0; i < IMX_USB_NB_EP + 1; i++) {
- imx_usb->usbd_int[i] = platform_get_irq(pdev, i);
- if (imx_usb->usbd_int[i] < 0) {
- dev_err(&pdev->dev, "can't get irq number\n");
- ret = -ENODEV;
- goto fail3;
- }
- }
-
- for (i = 0; i < IMX_USB_NB_EP + 1; i++) {
- ret = request_irq(imx_usb->usbd_int[i], intr_handler(i),
- 0, driver_name, imx_usb);
- if (ret) {
- dev_err(&pdev->dev, "can't get irq %i, err %d\n",
- imx_usb->usbd_int[i], ret);
- for (--i; i >= 0; i--)
- free_irq(imx_usb->usbd_int[i], imx_usb);
- goto fail3;
- }
- }
-
- imx_usb->res = res;
- imx_usb->base = base;
- imx_usb->clk = clk;
- imx_usb->dev = &pdev->dev;
-
- platform_set_drvdata(pdev, imx_usb);
-
- usb_init_data(imx_usb);
- imx_udc_init(imx_usb);
-
- init_timer(&imx_usb->timer);
- imx_usb->timer.function = handle_config;
- imx_usb->timer.data = (unsigned long)imx_usb;
-
- ret = usb_add_gadget_udc(&pdev->dev, &imx_usb->gadget);
- if (ret)
- goto fail4;
-
- return 0;
-fail4:
- for (i = 0; i < IMX_USB_NB_EP + 1; i++)
- free_irq(imx_usb->usbd_int[i], imx_usb);
-fail3:
- clk_put(clk);
- clk_disable_unprepare(clk);
-fail2:
- iounmap(base);
-fail1:
- if (pdata->exit)
- pdata->exit(&pdev->dev);
-fail0:
- release_mem_region(res->start, res_size);
- return ret;
-}
-
-static int __exit imx_udc_remove(struct platform_device *pdev)
-{
- struct imx_udc_struct *imx_usb = platform_get_drvdata(pdev);
- struct imxusb_platform_data *pdata = pdev->dev.platform_data;
- int i;
-
- usb_del_gadget_udc(&imx_usb->gadget);
- imx_udc_disable(imx_usb);
- del_timer(&imx_usb->timer);
-
- for (i = 0; i < IMX_USB_NB_EP + 1; i++)
- free_irq(imx_usb->usbd_int[i], imx_usb);
-
- clk_put(imx_usb->clk);
- clk_disable_unprepare(imx_usb->clk);
- iounmap(imx_usb->base);
-
- release_mem_region(imx_usb->res->start, resource_size(imx_usb->res));
-
- if (pdata->exit)
- pdata->exit(&pdev->dev);
-
- return 0;
-}
-
-/*----------------------------------------------------------------------------*/
-
-#ifdef CONFIG_PM
-#define imx_udc_suspend NULL
-#define imx_udc_resume NULL
-#else
-#define imx_udc_suspend NULL
-#define imx_udc_resume NULL
-#endif
-
-/*----------------------------------------------------------------------------*/
-
-static struct platform_driver udc_driver = {
- .driver = {
- .name = driver_name,
- .owner = THIS_MODULE,
- },
- .remove = __exit_p(imx_udc_remove),
- .suspend = imx_udc_suspend,
- .resume = imx_udc_resume,
-};
-
-module_platform_driver_probe(udc_driver, imx_udc_probe);
-
-MODULE_DESCRIPTION("IMX USB Device Controller driver");
-MODULE_AUTHOR("Darius Augulis <augulis.darius@gmail.com>");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS("platform:imx_udc");
+++ /dev/null
-/*
- * Copyright (C) 2005 Mike Lee(eemike@gmail.com)
- *
- * This udc driver is now under testing and code is based on pxa2xx_udc.h
- * Please use it with your own risk!
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- */
-
-#ifndef __LINUX_USB_GADGET_IMX_H
-#define __LINUX_USB_GADGET_IMX_H
-
-#include <linux/types.h>
-
-/* Helper macros */
-#define EP_NO(ep) ((ep->bEndpointAddress) & ~USB_DIR_IN) /* IN:1, OUT:0 */
-#define EP_DIR(ep) ((ep->bEndpointAddress) & USB_DIR_IN ? 1 : 0)
-#define IMX_USB_NB_EP 6
-
-/* Driver structures */
-struct imx_request {
- struct usb_request req;
- struct list_head queue;
- unsigned int in_use;
-};
-
-enum ep0_state {
- EP0_IDLE,
- EP0_IN_DATA_PHASE,
- EP0_OUT_DATA_PHASE,
- EP0_CONFIG,
- EP0_STALL,
-};
-
-struct imx_ep_struct {
- struct usb_ep ep;
- struct imx_udc_struct *imx_usb;
- struct list_head queue;
- unsigned char stopped;
- unsigned char fifosize;
- unsigned char bEndpointAddress;
- unsigned char bmAttributes;
-};
-
-struct imx_udc_struct {
- struct usb_gadget gadget;
- struct usb_gadget_driver *driver;
- struct device *dev;
- struct imx_ep_struct imx_ep[IMX_USB_NB_EP];
- struct clk *clk;
- struct timer_list timer;
- enum ep0_state ep0state;
- struct resource *res;
- void __iomem *base;
- unsigned char set_config;
- int cfg,
- intf,
- alt,
- usbd_int[7];
-};
-
-/* USB registers */
-#define USB_FRAME (0x00) /* USB frame */
-#define USB_SPEC (0x04) /* USB Spec */
-#define USB_STAT (0x08) /* USB Status */
-#define USB_CTRL (0x0C) /* USB Control */
-#define USB_DADR (0x10) /* USB Desc RAM addr */
-#define USB_DDAT (0x14) /* USB Desc RAM/EP buffer data */
-#define USB_INTR (0x18) /* USB interrupt */
-#define USB_MASK (0x1C) /* USB Mask */
-#define USB_ENAB (0x24) /* USB Enable */
-#define USB_EP_STAT(x) (0x30 + (x*0x30)) /* USB status/control */
-#define USB_EP_INTR(x) (0x34 + (x*0x30)) /* USB interrupt */
-#define USB_EP_MASK(x) (0x38 + (x*0x30)) /* USB mask */
-#define USB_EP_FDAT(x) (0x3C + (x*0x30)) /* USB FIFO data */
-#define USB_EP_FDAT0(x) (0x3C + (x*0x30)) /* USB FIFO data */
-#define USB_EP_FDAT1(x) (0x3D + (x*0x30)) /* USB FIFO data */
-#define USB_EP_FDAT2(x) (0x3E + (x*0x30)) /* USB FIFO data */
-#define USB_EP_FDAT3(x) (0x3F + (x*0x30)) /* USB FIFO data */
-#define USB_EP_FSTAT(x) (0x40 + (x*0x30)) /* USB FIFO status */
-#define USB_EP_FCTRL(x) (0x44 + (x*0x30)) /* USB FIFO control */
-#define USB_EP_LRFP(x) (0x48 + (x*0x30)) /* USB last rd f. pointer */
-#define USB_EP_LWFP(x) (0x4C + (x*0x30)) /* USB last wr f. pointer */
-#define USB_EP_FALRM(x) (0x50 + (x*0x30)) /* USB FIFO alarm */
-#define USB_EP_FRDP(x) (0x54 + (x*0x30)) /* USB FIFO read pointer */
-#define USB_EP_FWRP(x) (0x58 + (x*0x30)) /* USB FIFO write pointer */
-/* USB Control Register Bit Fields.*/
-#define CTRL_CMDOVER (1<<6) /* UDC status */
-#define CTRL_CMDERROR (1<<5) /* UDC status */
-#define CTRL_FE_ENA (1<<3) /* Enable Font End logic */
-#define CTRL_UDC_RST (1<<2) /* UDC reset */
-#define CTRL_AFE_ENA (1<<1) /* Analog Font end enable */
-#define CTRL_RESUME (1<<0) /* UDC resume */
-/* USB Status Register Bit Fields.*/
-#define STAT_RST (1<<8)
-#define STAT_SUSP (1<<7)
-#define STAT_CFG (3<<5)
-#define STAT_INTF (3<<3)
-#define STAT_ALTSET (7<<0)
-/* USB Interrupt Status/Mask Registers Bit fields */
-#define INTR_WAKEUP (1<<31) /* Wake up Interrupt */
-#define INTR_MSOF (1<<7) /* Missed Start of Frame */
-#define INTR_SOF (1<<6) /* Start of Frame */
-#define INTR_RESET_STOP (1<<5) /* Reset Signaling stop */
-#define INTR_RESET_START (1<<4) /* Reset Signaling start */
-#define INTR_RESUME (1<<3) /* Suspend to resume */
-#define INTR_SUSPEND (1<<2) /* Active to suspend */
-#define INTR_FRAME_MATCH (1<<1) /* Frame matched */
-#define INTR_CFG_CHG (1<<0) /* Configuration change occurred */
-/* USB Enable Register Bit Fields.*/
-#define ENAB_RST (1<<31) /* Reset USB modules */
-#define ENAB_ENAB (1<<30) /* Enable USB modules*/
-#define ENAB_SUSPEND (1<<29) /* Suspend USB modules */
-#define ENAB_ENDIAN (1<<28) /* Endian of USB modules */
-#define ENAB_PWRMD (1<<0) /* Power mode of USB modules */
-/* USB Descriptor Ram Address Register bit fields */
-#define DADR_CFG (1<<31) /* Configuration */
-#define DADR_BSY (1<<30) /* Busy status */
-#define DADR_DADR (0x1FF) /* Descriptor Ram Address */
-/* USB Descriptor RAM/Endpoint Buffer Data Register bit fields */
-#define DDAT_DDAT (0xFF) /* Descriptor Endpoint Buffer */
-/* USB Endpoint Status Register bit fields */
-#define EPSTAT_BCOUNT (0x7F<<16) /* Endpoint FIFO byte count */
-#define EPSTAT_SIP (1<<8) /* Endpoint setup in progress */
-#define EPSTAT_DIR (1<<7) /* Endpoint transfer direction */
-#define EPSTAT_MAX (3<<5) /* Endpoint Max packet size */
-#define EPSTAT_TYP (3<<3) /* Endpoint type */
-#define EPSTAT_ZLPS (1<<2) /* Send zero length packet */
-#define EPSTAT_FLUSH (1<<1) /* Endpoint FIFO Flush */
-#define EPSTAT_STALL (1<<0) /* Force stall */
-/* USB Endpoint FIFO Status Register bit fields */
-#define FSTAT_FRAME_STAT (0xF<<24) /* Frame status bit [0-3] */
-#define FSTAT_ERR (1<<22) /* FIFO error */
-#define FSTAT_UF (1<<21) /* FIFO underflow */
-#define FSTAT_OF (1<<20) /* FIFO overflow */
-#define FSTAT_FR (1<<19) /* FIFO frame ready */
-#define FSTAT_FULL (1<<18) /* FIFO full */
-#define FSTAT_ALRM (1<<17) /* FIFO alarm */
-#define FSTAT_EMPTY (1<<16) /* FIFO empty */
-/* USB Endpoint FIFO Control Register bit fields */
-#define FCTRL_WFR (1<<29) /* Write frame end */
-/* USB Endpoint Interrupt Status Regsiter bit fields */
-#define EPINTR_FIFO_FULL (1<<8) /* fifo full */
-#define EPINTR_FIFO_EMPTY (1<<7) /* fifo empty */
-#define EPINTR_FIFO_ERROR (1<<6) /* fifo error */
-#define EPINTR_FIFO_HIGH (1<<5) /* fifo high */
-#define EPINTR_FIFO_LOW (1<<4) /* fifo low */
-#define EPINTR_MDEVREQ (1<<3) /* multi Device request */
-#define EPINTR_EOT (1<<2) /* fifo end of transfer */
-#define EPINTR_DEVREQ (1<<1) /* Device request */
-#define EPINTR_EOF (1<<0) /* fifo end of frame */
-
-/* Debug macros */
-#ifdef DEBUG
-
-/* #define DEBUG_REQ */
-/* #define DEBUG_TRX */
-/* #define DEBUG_INIT */
-/* #define DEBUG_EP0 */
-/* #define DEBUG_EPX */
-/* #define DEBUG_IRQ */
-/* #define DEBUG_EPIRQ */
-/* #define DEBUG_DUMP */
-/* #define DEBUG_ERR */
-
-#ifdef DEBUG_REQ
- #define D_REQ(dev, args...) dev_dbg(dev, ## args)
-#else
- #define D_REQ(dev, args...) do {} while (0)
-#endif /* DEBUG_REQ */
-
-#ifdef DEBUG_TRX
- #define D_TRX(dev, args...) dev_dbg(dev, ## args)
-#else
- #define D_TRX(dev, args...) do {} while (0)
-#endif /* DEBUG_TRX */
-
-#ifdef DEBUG_INIT
- #define D_INI(dev, args...) dev_dbg(dev, ## args)
-#else
- #define D_INI(dev, args...) do {} while (0)
-#endif /* DEBUG_INIT */
-
-#ifdef DEBUG_EP0
- static const char *state_name[] = {
- "EP0_IDLE",
- "EP0_IN_DATA_PHASE",
- "EP0_OUT_DATA_PHASE",
- "EP0_CONFIG",
- "EP0_STALL"
- };
- #define D_EP0(dev, args...) dev_dbg(dev, ## args)
-#else
- #define D_EP0(dev, args...) do {} while (0)
-#endif /* DEBUG_EP0 */
-
-#ifdef DEBUG_EPX
- #define D_EPX(dev, args...) dev_dbg(dev, ## args)
-#else
- #define D_EPX(dev, args...) do {} while (0)
-#endif /* DEBUG_EP0 */
-
-#ifdef DEBUG_IRQ
- static void dump_intr(const char *label, int irqreg, struct device *dev)
- {
- dev_dbg(dev, "<%s> USB_INTR=[%s%s%s%s%s%s%s%s%s]\n", label,
- (irqreg & INTR_WAKEUP) ? " wake" : "",
- (irqreg & INTR_MSOF) ? " msof" : "",
- (irqreg & INTR_SOF) ? " sof" : "",
- (irqreg & INTR_RESUME) ? " resume" : "",
- (irqreg & INTR_SUSPEND) ? " suspend" : "",
- (irqreg & INTR_RESET_STOP) ? " noreset" : "",
- (irqreg & INTR_RESET_START) ? " reset" : "",
- (irqreg & INTR_FRAME_MATCH) ? " fmatch" : "",
- (irqreg & INTR_CFG_CHG) ? " config" : "");
- }
-#else
- #define dump_intr(x, y, z) do {} while (0)
-#endif /* DEBUG_IRQ */
-
-#ifdef DEBUG_EPIRQ
- static void dump_ep_intr(const char *label, int nr, int irqreg,
- struct device *dev)
- {
- dev_dbg(dev, "<%s> EP%d_INTR=[%s%s%s%s%s%s%s%s%s]\n", label, nr,
- (irqreg & EPINTR_FIFO_FULL) ? " full" : "",
- (irqreg & EPINTR_FIFO_EMPTY) ? " fempty" : "",
- (irqreg & EPINTR_FIFO_ERROR) ? " ferr" : "",
- (irqreg & EPINTR_FIFO_HIGH) ? " fhigh" : "",
- (irqreg & EPINTR_FIFO_LOW) ? " flow" : "",
- (irqreg & EPINTR_MDEVREQ) ? " mreq" : "",
- (irqreg & EPINTR_EOF) ? " eof" : "",
- (irqreg & EPINTR_DEVREQ) ? " devreq" : "",
- (irqreg & EPINTR_EOT) ? " eot" : "");
- }
-#else
- #define dump_ep_intr(x, y, z, i) do {} while (0)
-#endif /* DEBUG_IRQ */
-
-#ifdef DEBUG_DUMP
- static void dump_usb_stat(const char *label,
- struct imx_udc_struct *imx_usb)
- {
- int temp = __raw_readl(imx_usb->base + USB_STAT);
-
- dev_dbg(imx_usb->dev,
- "<%s> USB_STAT=[%s%s CFG=%d, INTF=%d, ALTR=%d]\n", label,
- (temp & STAT_RST) ? " reset" : "",
- (temp & STAT_SUSP) ? " suspend" : "",
- (temp & STAT_CFG) >> 5,
- (temp & STAT_INTF) >> 3,
- (temp & STAT_ALTSET));
- }
-
- static void dump_ep_stat(const char *label,
- struct imx_ep_struct *imx_ep)
- {
- int temp = __raw_readl(imx_ep->imx_usb->base
- + USB_EP_INTR(EP_NO(imx_ep)));
-
- dev_dbg(imx_ep->imx_usb->dev,
- "<%s> EP%d_INTR=[%s%s%s%s%s%s%s%s%s]\n",
- label, EP_NO(imx_ep),
- (temp & EPINTR_FIFO_FULL) ? " full" : "",
- (temp & EPINTR_FIFO_EMPTY) ? " fempty" : "",
- (temp & EPINTR_FIFO_ERROR) ? " ferr" : "",
- (temp & EPINTR_FIFO_HIGH) ? " fhigh" : "",
- (temp & EPINTR_FIFO_LOW) ? " flow" : "",
- (temp & EPINTR_MDEVREQ) ? " mreq" : "",
- (temp & EPINTR_EOF) ? " eof" : "",
- (temp & EPINTR_DEVREQ) ? " devreq" : "",
- (temp & EPINTR_EOT) ? " eot" : "");
-
- temp = __raw_readl(imx_ep->imx_usb->base
- + USB_EP_STAT(EP_NO(imx_ep)));
-
- dev_dbg(imx_ep->imx_usb->dev,
- "<%s> EP%d_STAT=[%s%s bcount=%d]\n",
- label, EP_NO(imx_ep),
- (temp & EPSTAT_SIP) ? " sip" : "",
- (temp & EPSTAT_STALL) ? " stall" : "",
- (temp & EPSTAT_BCOUNT) >> 16);
-
- temp = __raw_readl(imx_ep->imx_usb->base
- + USB_EP_FSTAT(EP_NO(imx_ep)));
-
- dev_dbg(imx_ep->imx_usb->dev,
- "<%s> EP%d_FSTAT=[%s%s%s%s%s%s%s]\n",
- label, EP_NO(imx_ep),
- (temp & FSTAT_ERR) ? " ferr" : "",
- (temp & FSTAT_UF) ? " funder" : "",
- (temp & FSTAT_OF) ? " fover" : "",
- (temp & FSTAT_FR) ? " fready" : "",
- (temp & FSTAT_FULL) ? " ffull" : "",
- (temp & FSTAT_ALRM) ? " falarm" : "",
- (temp & FSTAT_EMPTY) ? " fempty" : "");
- }
-
- static void dump_req(const char *label, struct imx_ep_struct *imx_ep,
- struct usb_request *req)
- {
- int i;
-
- if (!req || !req->buf) {
- dev_dbg(imx_ep->imx_usb->dev,
- "<%s> req or req buf is free\n", label);
- return;
- }
-
- if ((!EP_NO(imx_ep) && imx_ep->imx_usb->ep0state
- == EP0_IN_DATA_PHASE)
- || (EP_NO(imx_ep) && EP_DIR(imx_ep))) {
-
- dev_dbg(imx_ep->imx_usb->dev,
- "<%s> request dump <", label);
- for (i = 0; i < req->length; i++)
- printk("%02x-", *((u8 *)req->buf + i));
- printk(">\n");
- }
- }
-
-#else
- #define dump_ep_stat(x, y) do {} while (0)
- #define dump_usb_stat(x, y) do {} while (0)
- #define dump_req(x, y, z) do {} while (0)
-#endif /* DEBUG_DUMP */
-
-#ifdef DEBUG_ERR
- #define D_ERR(dev, args...) dev_dbg(dev, ## args)
-#else
- #define D_ERR(dev, args...) do {} while (0)
-#endif
-
-#else
- #define D_REQ(dev, args...) do {} while (0)
- #define D_TRX(dev, args...) do {} while (0)
- #define D_INI(dev, args...) do {} while (0)
- #define D_EP0(dev, args...) do {} while (0)
- #define D_EPX(dev, args...) do {} while (0)
- #define dump_ep_intr(x, y, z, i) do {} while (0)
- #define dump_intr(x, y, z) do {} while (0)
- #define dump_ep_stat(x, y) do {} while (0)
- #define dump_usb_stat(x, y) do {} while (0)
- #define dump_req(x, y, z) do {} while (0)
- #define D_ERR(dev, args...) do {} while (0)
-#endif /* DEBUG */
-
-#endif /* __LINUX_USB_GADGET_IMX_H */
projects / linux-beck.git / commitdiff