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Commit 2b0c4953 authored by Felipe Balbi's avatar Felipe Balbi
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usb: gadget: remove imx_udc 

That driver hasn't been really maintained for
a long time. It doesn't compile in any way, it
includes non-existent headers, has no users,
and is just plain broken.

The person who used to work with that driver
has publicly stated that he has no plans to
touch that driver again and is ok with removal[1].

Due to these factors, imx_udc is now removed from
the tree, if someone really believe it needs to
be kept, please fix the bugs in that driver.

[1] http://marc.info/?l=linux-usb&m=136197620417636&w=2Signed-off-by: default avatarFelipe Balbi <balbi@ti.com>
parent 1a356dbc
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drivers/usb/gadget/Kconfig
View file @ 2b0c4953
......@@ -287,21 +287,6 @@ config USB_S3C_HSOTG
The Samsung S3C64XX USB2.0 high-speed gadget controller
integrated into the S3C64XX series SoC.
config USB_IMX
tristate "Freescale i.MX1 USB Peripheral Controller"
depends on ARCH_MXC
depends on BROKEN
help
Freescale's i.MX1 includes an integrated full speed
USB 1.1 device controller.
It has Six fixed-function endpoints, as well as endpoint
zero (for control transfers).
Say "y" to link the driver statically, or "m" to build a
dynamically linked module called "imx_udc" and force all
gadget drivers to also be dynamically linked.
config USB_S3C2410
tristate "S3C2410 USB Device Controller"
depends on ARCH_S3C24XX
......
drivers/usb/gadget/Makefile
View file @ 2b0c4953
......@@ -13,7 +13,6 @@ obj-$(CONFIG_USB_NET2280) += net2280.o
obj-$(CONFIG_USB_AMD5536UDC) += amd5536udc.o
obj-$(CONFIG_USB_PXA25X) += pxa25x_udc.o
obj-$(CONFIG_USB_PXA27X) += pxa27x_udc.o
obj-$(CONFIG_USB_IMX) += imx_udc.o
obj-$(CONFIG_USB_GOKU) += goku_udc.o
obj-$(CONFIG_USB_OMAP) += omap_udc.o
obj-$(CONFIG_USB_S3C2410) += s3c2410_udc.o
......
drivers/usb/gadget/imx_udc.c deleted 100644 → 0
View file @ 1a356dbc
/*
* 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");
drivers/usb/gadget/imx_udc.h deleted 100644 → 0
View file @ 1a356dbc
/*
* 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 */
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