![Jingoo Han](/assets/img/avatar_default.png)
'usba_gadget_template' is used only in this file. Thus, make 'usba_gadget_template' static, in order to fix the following sparse warning. warning: symbol 'usba_gadget_template' was not declared. Should it be static? Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com> Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Felipe Balbi <balbi@ti.com>
2128 lines
51 KiB
C
2128 lines
51 KiB
C
/*
|
|
* Driver for the Atmel USBA high speed USB device controller
|
|
*
|
|
* Copyright (C) 2005-2007 Atmel Corporation
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*/
|
|
#include <linux/clk.h>
|
|
#include <linux/module.h>
|
|
#include <linux/init.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/io.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/device.h>
|
|
#include <linux/dma-mapping.h>
|
|
#include <linux/list.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/usb/ch9.h>
|
|
#include <linux/usb/gadget.h>
|
|
#include <linux/usb/atmel_usba_udc.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/platform_data/atmel.h>
|
|
#include <linux/of.h>
|
|
#include <linux/of_gpio.h>
|
|
|
|
#include <asm/gpio.h>
|
|
|
|
#include "atmel_usba_udc.h"
|
|
|
|
#ifdef CONFIG_USB_GADGET_DEBUG_FS
|
|
#include <linux/debugfs.h>
|
|
#include <linux/uaccess.h>
|
|
|
|
static int queue_dbg_open(struct inode *inode, struct file *file)
|
|
{
|
|
struct usba_ep *ep = inode->i_private;
|
|
struct usba_request *req, *req_copy;
|
|
struct list_head *queue_data;
|
|
|
|
queue_data = kmalloc(sizeof(*queue_data), GFP_KERNEL);
|
|
if (!queue_data)
|
|
return -ENOMEM;
|
|
INIT_LIST_HEAD(queue_data);
|
|
|
|
spin_lock_irq(&ep->udc->lock);
|
|
list_for_each_entry(req, &ep->queue, queue) {
|
|
req_copy = kmemdup(req, sizeof(*req_copy), GFP_ATOMIC);
|
|
if (!req_copy)
|
|
goto fail;
|
|
list_add_tail(&req_copy->queue, queue_data);
|
|
}
|
|
spin_unlock_irq(&ep->udc->lock);
|
|
|
|
file->private_data = queue_data;
|
|
return 0;
|
|
|
|
fail:
|
|
spin_unlock_irq(&ep->udc->lock);
|
|
list_for_each_entry_safe(req, req_copy, queue_data, queue) {
|
|
list_del(&req->queue);
|
|
kfree(req);
|
|
}
|
|
kfree(queue_data);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
/*
|
|
* bbbbbbbb llllllll IZS sssss nnnn FDL\n\0
|
|
*
|
|
* b: buffer address
|
|
* l: buffer length
|
|
* I/i: interrupt/no interrupt
|
|
* Z/z: zero/no zero
|
|
* S/s: short ok/short not ok
|
|
* s: status
|
|
* n: nr_packets
|
|
* F/f: submitted/not submitted to FIFO
|
|
* D/d: using/not using DMA
|
|
* L/l: last transaction/not last transaction
|
|
*/
|
|
static ssize_t queue_dbg_read(struct file *file, char __user *buf,
|
|
size_t nbytes, loff_t *ppos)
|
|
{
|
|
struct list_head *queue = file->private_data;
|
|
struct usba_request *req, *tmp_req;
|
|
size_t len, remaining, actual = 0;
|
|
char tmpbuf[38];
|
|
|
|
if (!access_ok(VERIFY_WRITE, buf, nbytes))
|
|
return -EFAULT;
|
|
|
|
mutex_lock(&file_inode(file)->i_mutex);
|
|
list_for_each_entry_safe(req, tmp_req, queue, queue) {
|
|
len = snprintf(tmpbuf, sizeof(tmpbuf),
|
|
"%8p %08x %c%c%c %5d %c%c%c\n",
|
|
req->req.buf, req->req.length,
|
|
req->req.no_interrupt ? 'i' : 'I',
|
|
req->req.zero ? 'Z' : 'z',
|
|
req->req.short_not_ok ? 's' : 'S',
|
|
req->req.status,
|
|
req->submitted ? 'F' : 'f',
|
|
req->using_dma ? 'D' : 'd',
|
|
req->last_transaction ? 'L' : 'l');
|
|
len = min(len, sizeof(tmpbuf));
|
|
if (len > nbytes)
|
|
break;
|
|
|
|
list_del(&req->queue);
|
|
kfree(req);
|
|
|
|
remaining = __copy_to_user(buf, tmpbuf, len);
|
|
actual += len - remaining;
|
|
if (remaining)
|
|
break;
|
|
|
|
nbytes -= len;
|
|
buf += len;
|
|
}
|
|
mutex_unlock(&file_inode(file)->i_mutex);
|
|
|
|
return actual;
|
|
}
|
|
|
|
static int queue_dbg_release(struct inode *inode, struct file *file)
|
|
{
|
|
struct list_head *queue_data = file->private_data;
|
|
struct usba_request *req, *tmp_req;
|
|
|
|
list_for_each_entry_safe(req, tmp_req, queue_data, queue) {
|
|
list_del(&req->queue);
|
|
kfree(req);
|
|
}
|
|
kfree(queue_data);
|
|
return 0;
|
|
}
|
|
|
|
static int regs_dbg_open(struct inode *inode, struct file *file)
|
|
{
|
|
struct usba_udc *udc;
|
|
unsigned int i;
|
|
u32 *data;
|
|
int ret = -ENOMEM;
|
|
|
|
mutex_lock(&inode->i_mutex);
|
|
udc = inode->i_private;
|
|
data = kmalloc(inode->i_size, GFP_KERNEL);
|
|
if (!data)
|
|
goto out;
|
|
|
|
spin_lock_irq(&udc->lock);
|
|
for (i = 0; i < inode->i_size / 4; i++)
|
|
data[i] = __raw_readl(udc->regs + i * 4);
|
|
spin_unlock_irq(&udc->lock);
|
|
|
|
file->private_data = data;
|
|
ret = 0;
|
|
|
|
out:
|
|
mutex_unlock(&inode->i_mutex);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static ssize_t regs_dbg_read(struct file *file, char __user *buf,
|
|
size_t nbytes, loff_t *ppos)
|
|
{
|
|
struct inode *inode = file_inode(file);
|
|
int ret;
|
|
|
|
mutex_lock(&inode->i_mutex);
|
|
ret = simple_read_from_buffer(buf, nbytes, ppos,
|
|
file->private_data,
|
|
file_inode(file)->i_size);
|
|
mutex_unlock(&inode->i_mutex);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int regs_dbg_release(struct inode *inode, struct file *file)
|
|
{
|
|
kfree(file->private_data);
|
|
return 0;
|
|
}
|
|
|
|
const struct file_operations queue_dbg_fops = {
|
|
.owner = THIS_MODULE,
|
|
.open = queue_dbg_open,
|
|
.llseek = no_llseek,
|
|
.read = queue_dbg_read,
|
|
.release = queue_dbg_release,
|
|
};
|
|
|
|
const struct file_operations regs_dbg_fops = {
|
|
.owner = THIS_MODULE,
|
|
.open = regs_dbg_open,
|
|
.llseek = generic_file_llseek,
|
|
.read = regs_dbg_read,
|
|
.release = regs_dbg_release,
|
|
};
|
|
|
|
static void usba_ep_init_debugfs(struct usba_udc *udc,
|
|
struct usba_ep *ep)
|
|
{
|
|
struct dentry *ep_root;
|
|
|
|
ep_root = debugfs_create_dir(ep->ep.name, udc->debugfs_root);
|
|
if (!ep_root)
|
|
goto err_root;
|
|
ep->debugfs_dir = ep_root;
|
|
|
|
ep->debugfs_queue = debugfs_create_file("queue", 0400, ep_root,
|
|
ep, &queue_dbg_fops);
|
|
if (!ep->debugfs_queue)
|
|
goto err_queue;
|
|
|
|
if (ep->can_dma) {
|
|
ep->debugfs_dma_status
|
|
= debugfs_create_u32("dma_status", 0400, ep_root,
|
|
&ep->last_dma_status);
|
|
if (!ep->debugfs_dma_status)
|
|
goto err_dma_status;
|
|
}
|
|
if (ep_is_control(ep)) {
|
|
ep->debugfs_state
|
|
= debugfs_create_u32("state", 0400, ep_root,
|
|
&ep->state);
|
|
if (!ep->debugfs_state)
|
|
goto err_state;
|
|
}
|
|
|
|
return;
|
|
|
|
err_state:
|
|
if (ep->can_dma)
|
|
debugfs_remove(ep->debugfs_dma_status);
|
|
err_dma_status:
|
|
debugfs_remove(ep->debugfs_queue);
|
|
err_queue:
|
|
debugfs_remove(ep_root);
|
|
err_root:
|
|
dev_err(&ep->udc->pdev->dev,
|
|
"failed to create debugfs directory for %s\n", ep->ep.name);
|
|
}
|
|
|
|
static void usba_ep_cleanup_debugfs(struct usba_ep *ep)
|
|
{
|
|
debugfs_remove(ep->debugfs_queue);
|
|
debugfs_remove(ep->debugfs_dma_status);
|
|
debugfs_remove(ep->debugfs_state);
|
|
debugfs_remove(ep->debugfs_dir);
|
|
ep->debugfs_dma_status = NULL;
|
|
ep->debugfs_dir = NULL;
|
|
}
|
|
|
|
static void usba_init_debugfs(struct usba_udc *udc)
|
|
{
|
|
struct dentry *root, *regs;
|
|
struct resource *regs_resource;
|
|
|
|
root = debugfs_create_dir(udc->gadget.name, NULL);
|
|
if (IS_ERR(root) || !root)
|
|
goto err_root;
|
|
udc->debugfs_root = root;
|
|
|
|
regs = debugfs_create_file("regs", 0400, root, udc, ®s_dbg_fops);
|
|
if (!regs)
|
|
goto err_regs;
|
|
|
|
regs_resource = platform_get_resource(udc->pdev, IORESOURCE_MEM,
|
|
CTRL_IOMEM_ID);
|
|
regs->d_inode->i_size = resource_size(regs_resource);
|
|
udc->debugfs_regs = regs;
|
|
|
|
usba_ep_init_debugfs(udc, to_usba_ep(udc->gadget.ep0));
|
|
|
|
return;
|
|
|
|
err_regs:
|
|
debugfs_remove(root);
|
|
err_root:
|
|
udc->debugfs_root = NULL;
|
|
dev_err(&udc->pdev->dev, "debugfs is not available\n");
|
|
}
|
|
|
|
static void usba_cleanup_debugfs(struct usba_udc *udc)
|
|
{
|
|
usba_ep_cleanup_debugfs(to_usba_ep(udc->gadget.ep0));
|
|
debugfs_remove(udc->debugfs_regs);
|
|
debugfs_remove(udc->debugfs_root);
|
|
udc->debugfs_regs = NULL;
|
|
udc->debugfs_root = NULL;
|
|
}
|
|
#else
|
|
static inline void usba_ep_init_debugfs(struct usba_udc *udc,
|
|
struct usba_ep *ep)
|
|
{
|
|
|
|
}
|
|
|
|
static inline void usba_ep_cleanup_debugfs(struct usba_ep *ep)
|
|
{
|
|
|
|
}
|
|
|
|
static inline void usba_init_debugfs(struct usba_udc *udc)
|
|
{
|
|
|
|
}
|
|
|
|
static inline void usba_cleanup_debugfs(struct usba_udc *udc)
|
|
{
|
|
|
|
}
|
|
#endif
|
|
|
|
static int vbus_is_present(struct usba_udc *udc)
|
|
{
|
|
if (gpio_is_valid(udc->vbus_pin))
|
|
return gpio_get_value(udc->vbus_pin) ^ udc->vbus_pin_inverted;
|
|
|
|
/* No Vbus detection: Assume always present */
|
|
return 1;
|
|
}
|
|
|
|
#if defined(CONFIG_ARCH_AT91SAM9RL)
|
|
|
|
#include <mach/at91_pmc.h>
|
|
|
|
static void toggle_bias(int is_on)
|
|
{
|
|
unsigned int uckr = at91_pmc_read(AT91_CKGR_UCKR);
|
|
|
|
if (is_on)
|
|
at91_pmc_write(AT91_CKGR_UCKR, uckr | AT91_PMC_BIASEN);
|
|
else
|
|
at91_pmc_write(AT91_CKGR_UCKR, uckr & ~(AT91_PMC_BIASEN));
|
|
}
|
|
|
|
#else
|
|
|
|
static void toggle_bias(int is_on)
|
|
{
|
|
}
|
|
|
|
#endif /* CONFIG_ARCH_AT91SAM9RL */
|
|
|
|
static void next_fifo_transaction(struct usba_ep *ep, struct usba_request *req)
|
|
{
|
|
unsigned int transaction_len;
|
|
|
|
transaction_len = req->req.length - req->req.actual;
|
|
req->last_transaction = 1;
|
|
if (transaction_len > ep->ep.maxpacket) {
|
|
transaction_len = ep->ep.maxpacket;
|
|
req->last_transaction = 0;
|
|
} else if (transaction_len == ep->ep.maxpacket && req->req.zero)
|
|
req->last_transaction = 0;
|
|
|
|
DBG(DBG_QUEUE, "%s: submit_transaction, req %p (length %d)%s\n",
|
|
ep->ep.name, req, transaction_len,
|
|
req->last_transaction ? ", done" : "");
|
|
|
|
memcpy_toio(ep->fifo, req->req.buf + req->req.actual, transaction_len);
|
|
usba_ep_writel(ep, SET_STA, USBA_TX_PK_RDY);
|
|
req->req.actual += transaction_len;
|
|
}
|
|
|
|
static void submit_request(struct usba_ep *ep, struct usba_request *req)
|
|
{
|
|
DBG(DBG_QUEUE, "%s: submit_request: req %p (length %d)\n",
|
|
ep->ep.name, req, req->req.length);
|
|
|
|
req->req.actual = 0;
|
|
req->submitted = 1;
|
|
|
|
if (req->using_dma) {
|
|
if (req->req.length == 0) {
|
|
usba_ep_writel(ep, CTL_ENB, USBA_TX_PK_RDY);
|
|
return;
|
|
}
|
|
|
|
if (req->req.zero)
|
|
usba_ep_writel(ep, CTL_ENB, USBA_SHORT_PACKET);
|
|
else
|
|
usba_ep_writel(ep, CTL_DIS, USBA_SHORT_PACKET);
|
|
|
|
usba_dma_writel(ep, ADDRESS, req->req.dma);
|
|
usba_dma_writel(ep, CONTROL, req->ctrl);
|
|
} else {
|
|
next_fifo_transaction(ep, req);
|
|
if (req->last_transaction) {
|
|
usba_ep_writel(ep, CTL_DIS, USBA_TX_PK_RDY);
|
|
usba_ep_writel(ep, CTL_ENB, USBA_TX_COMPLETE);
|
|
} else {
|
|
usba_ep_writel(ep, CTL_DIS, USBA_TX_COMPLETE);
|
|
usba_ep_writel(ep, CTL_ENB, USBA_TX_PK_RDY);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void submit_next_request(struct usba_ep *ep)
|
|
{
|
|
struct usba_request *req;
|
|
|
|
if (list_empty(&ep->queue)) {
|
|
usba_ep_writel(ep, CTL_DIS, USBA_TX_PK_RDY | USBA_RX_BK_RDY);
|
|
return;
|
|
}
|
|
|
|
req = list_entry(ep->queue.next, struct usba_request, queue);
|
|
if (!req->submitted)
|
|
submit_request(ep, req);
|
|
}
|
|
|
|
static void send_status(struct usba_udc *udc, struct usba_ep *ep)
|
|
{
|
|
ep->state = STATUS_STAGE_IN;
|
|
usba_ep_writel(ep, SET_STA, USBA_TX_PK_RDY);
|
|
usba_ep_writel(ep, CTL_ENB, USBA_TX_COMPLETE);
|
|
}
|
|
|
|
static void receive_data(struct usba_ep *ep)
|
|
{
|
|
struct usba_udc *udc = ep->udc;
|
|
struct usba_request *req;
|
|
unsigned long status;
|
|
unsigned int bytecount, nr_busy;
|
|
int is_complete = 0;
|
|
|
|
status = usba_ep_readl(ep, STA);
|
|
nr_busy = USBA_BFEXT(BUSY_BANKS, status);
|
|
|
|
DBG(DBG_QUEUE, "receive data: nr_busy=%u\n", nr_busy);
|
|
|
|
while (nr_busy > 0) {
|
|
if (list_empty(&ep->queue)) {
|
|
usba_ep_writel(ep, CTL_DIS, USBA_RX_BK_RDY);
|
|
break;
|
|
}
|
|
req = list_entry(ep->queue.next,
|
|
struct usba_request, queue);
|
|
|
|
bytecount = USBA_BFEXT(BYTE_COUNT, status);
|
|
|
|
if (status & (1 << 31))
|
|
is_complete = 1;
|
|
if (req->req.actual + bytecount >= req->req.length) {
|
|
is_complete = 1;
|
|
bytecount = req->req.length - req->req.actual;
|
|
}
|
|
|
|
memcpy_fromio(req->req.buf + req->req.actual,
|
|
ep->fifo, bytecount);
|
|
req->req.actual += bytecount;
|
|
|
|
usba_ep_writel(ep, CLR_STA, USBA_RX_BK_RDY);
|
|
|
|
if (is_complete) {
|
|
DBG(DBG_QUEUE, "%s: request done\n", ep->ep.name);
|
|
req->req.status = 0;
|
|
list_del_init(&req->queue);
|
|
usba_ep_writel(ep, CTL_DIS, USBA_RX_BK_RDY);
|
|
spin_unlock(&udc->lock);
|
|
req->req.complete(&ep->ep, &req->req);
|
|
spin_lock(&udc->lock);
|
|
}
|
|
|
|
status = usba_ep_readl(ep, STA);
|
|
nr_busy = USBA_BFEXT(BUSY_BANKS, status);
|
|
|
|
if (is_complete && ep_is_control(ep)) {
|
|
send_status(udc, ep);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
request_complete(struct usba_ep *ep, struct usba_request *req, int status)
|
|
{
|
|
struct usba_udc *udc = ep->udc;
|
|
|
|
WARN_ON(!list_empty(&req->queue));
|
|
|
|
if (req->req.status == -EINPROGRESS)
|
|
req->req.status = status;
|
|
|
|
if (req->using_dma)
|
|
usb_gadget_unmap_request(&udc->gadget, &req->req, ep->is_in);
|
|
|
|
DBG(DBG_GADGET | DBG_REQ,
|
|
"%s: req %p complete: status %d, actual %u\n",
|
|
ep->ep.name, req, req->req.status, req->req.actual);
|
|
|
|
spin_unlock(&udc->lock);
|
|
req->req.complete(&ep->ep, &req->req);
|
|
spin_lock(&udc->lock);
|
|
}
|
|
|
|
static void
|
|
request_complete_list(struct usba_ep *ep, struct list_head *list, int status)
|
|
{
|
|
struct usba_request *req, *tmp_req;
|
|
|
|
list_for_each_entry_safe(req, tmp_req, list, queue) {
|
|
list_del_init(&req->queue);
|
|
request_complete(ep, req, status);
|
|
}
|
|
}
|
|
|
|
static int
|
|
usba_ep_enable(struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc)
|
|
{
|
|
struct usba_ep *ep = to_usba_ep(_ep);
|
|
struct usba_udc *udc = ep->udc;
|
|
unsigned long flags, ept_cfg, maxpacket;
|
|
unsigned int nr_trans;
|
|
|
|
DBG(DBG_GADGET, "%s: ep_enable: desc=%p\n", ep->ep.name, desc);
|
|
|
|
maxpacket = usb_endpoint_maxp(desc) & 0x7ff;
|
|
|
|
if (((desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK) != ep->index)
|
|
|| ep->index == 0
|
|
|| desc->bDescriptorType != USB_DT_ENDPOINT
|
|
|| maxpacket == 0
|
|
|| maxpacket > ep->fifo_size) {
|
|
DBG(DBG_ERR, "ep_enable: Invalid argument");
|
|
return -EINVAL;
|
|
}
|
|
|
|
ep->is_isoc = 0;
|
|
ep->is_in = 0;
|
|
|
|
if (maxpacket <= 8)
|
|
ept_cfg = USBA_BF(EPT_SIZE, USBA_EPT_SIZE_8);
|
|
else
|
|
/* LSB is bit 1, not 0 */
|
|
ept_cfg = USBA_BF(EPT_SIZE, fls(maxpacket - 1) - 3);
|
|
|
|
DBG(DBG_HW, "%s: EPT_SIZE = %lu (maxpacket = %lu)\n",
|
|
ep->ep.name, ept_cfg, maxpacket);
|
|
|
|
if (usb_endpoint_dir_in(desc)) {
|
|
ep->is_in = 1;
|
|
ept_cfg |= USBA_EPT_DIR_IN;
|
|
}
|
|
|
|
switch (usb_endpoint_type(desc)) {
|
|
case USB_ENDPOINT_XFER_CONTROL:
|
|
ept_cfg |= USBA_BF(EPT_TYPE, USBA_EPT_TYPE_CONTROL);
|
|
ept_cfg |= USBA_BF(BK_NUMBER, USBA_BK_NUMBER_ONE);
|
|
break;
|
|
case USB_ENDPOINT_XFER_ISOC:
|
|
if (!ep->can_isoc) {
|
|
DBG(DBG_ERR, "ep_enable: %s is not isoc capable\n",
|
|
ep->ep.name);
|
|
return -EINVAL;
|
|
}
|
|
|
|
/*
|
|
* Bits 11:12 specify number of _additional_
|
|
* transactions per microframe.
|
|
*/
|
|
nr_trans = ((usb_endpoint_maxp(desc) >> 11) & 3) + 1;
|
|
if (nr_trans > 3)
|
|
return -EINVAL;
|
|
|
|
ep->is_isoc = 1;
|
|
ept_cfg |= USBA_BF(EPT_TYPE, USBA_EPT_TYPE_ISO);
|
|
|
|
/*
|
|
* Do triple-buffering on high-bandwidth iso endpoints.
|
|
*/
|
|
if (nr_trans > 1 && ep->nr_banks == 3)
|
|
ept_cfg |= USBA_BF(BK_NUMBER, USBA_BK_NUMBER_TRIPLE);
|
|
else
|
|
ept_cfg |= USBA_BF(BK_NUMBER, USBA_BK_NUMBER_DOUBLE);
|
|
ept_cfg |= USBA_BF(NB_TRANS, nr_trans);
|
|
break;
|
|
case USB_ENDPOINT_XFER_BULK:
|
|
ept_cfg |= USBA_BF(EPT_TYPE, USBA_EPT_TYPE_BULK);
|
|
ept_cfg |= USBA_BF(BK_NUMBER, USBA_BK_NUMBER_DOUBLE);
|
|
break;
|
|
case USB_ENDPOINT_XFER_INT:
|
|
ept_cfg |= USBA_BF(EPT_TYPE, USBA_EPT_TYPE_INT);
|
|
ept_cfg |= USBA_BF(BK_NUMBER, USBA_BK_NUMBER_DOUBLE);
|
|
break;
|
|
}
|
|
|
|
spin_lock_irqsave(&ep->udc->lock, flags);
|
|
|
|
ep->ep.desc = desc;
|
|
ep->ep.maxpacket = maxpacket;
|
|
|
|
usba_ep_writel(ep, CFG, ept_cfg);
|
|
usba_ep_writel(ep, CTL_ENB, USBA_EPT_ENABLE);
|
|
|
|
if (ep->can_dma) {
|
|
u32 ctrl;
|
|
|
|
usba_writel(udc, INT_ENB,
|
|
(usba_readl(udc, INT_ENB)
|
|
| USBA_BF(EPT_INT, 1 << ep->index)
|
|
| USBA_BF(DMA_INT, 1 << ep->index)));
|
|
ctrl = USBA_AUTO_VALID | USBA_INTDIS_DMA;
|
|
usba_ep_writel(ep, CTL_ENB, ctrl);
|
|
} else {
|
|
usba_writel(udc, INT_ENB,
|
|
(usba_readl(udc, INT_ENB)
|
|
| USBA_BF(EPT_INT, 1 << ep->index)));
|
|
}
|
|
|
|
spin_unlock_irqrestore(&udc->lock, flags);
|
|
|
|
DBG(DBG_HW, "EPT_CFG%d after init: %#08lx\n", ep->index,
|
|
(unsigned long)usba_ep_readl(ep, CFG));
|
|
DBG(DBG_HW, "INT_ENB after init: %#08lx\n",
|
|
(unsigned long)usba_readl(udc, INT_ENB));
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int usba_ep_disable(struct usb_ep *_ep)
|
|
{
|
|
struct usba_ep *ep = to_usba_ep(_ep);
|
|
struct usba_udc *udc = ep->udc;
|
|
LIST_HEAD(req_list);
|
|
unsigned long flags;
|
|
|
|
DBG(DBG_GADGET, "ep_disable: %s\n", ep->ep.name);
|
|
|
|
spin_lock_irqsave(&udc->lock, flags);
|
|
|
|
if (!ep->ep.desc) {
|
|
spin_unlock_irqrestore(&udc->lock, flags);
|
|
/* REVISIT because this driver disables endpoints in
|
|
* reset_all_endpoints() before calling disconnect(),
|
|
* most gadget drivers would trigger this non-error ...
|
|
*/
|
|
if (udc->gadget.speed != USB_SPEED_UNKNOWN)
|
|
DBG(DBG_ERR, "ep_disable: %s not enabled\n",
|
|
ep->ep.name);
|
|
return -EINVAL;
|
|
}
|
|
ep->ep.desc = NULL;
|
|
|
|
list_splice_init(&ep->queue, &req_list);
|
|
if (ep->can_dma) {
|
|
usba_dma_writel(ep, CONTROL, 0);
|
|
usba_dma_writel(ep, ADDRESS, 0);
|
|
usba_dma_readl(ep, STATUS);
|
|
}
|
|
usba_ep_writel(ep, CTL_DIS, USBA_EPT_ENABLE);
|
|
usba_writel(udc, INT_ENB,
|
|
usba_readl(udc, INT_ENB)
|
|
& ~USBA_BF(EPT_INT, 1 << ep->index));
|
|
|
|
request_complete_list(ep, &req_list, -ESHUTDOWN);
|
|
|
|
spin_unlock_irqrestore(&udc->lock, flags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct usb_request *
|
|
usba_ep_alloc_request(struct usb_ep *_ep, gfp_t gfp_flags)
|
|
{
|
|
struct usba_request *req;
|
|
|
|
DBG(DBG_GADGET, "ep_alloc_request: %p, 0x%x\n", _ep, gfp_flags);
|
|
|
|
req = kzalloc(sizeof(*req), gfp_flags);
|
|
if (!req)
|
|
return NULL;
|
|
|
|
INIT_LIST_HEAD(&req->queue);
|
|
|
|
return &req->req;
|
|
}
|
|
|
|
static void
|
|
usba_ep_free_request(struct usb_ep *_ep, struct usb_request *_req)
|
|
{
|
|
struct usba_request *req = to_usba_req(_req);
|
|
|
|
DBG(DBG_GADGET, "ep_free_request: %p, %p\n", _ep, _req);
|
|
|
|
kfree(req);
|
|
}
|
|
|
|
static int queue_dma(struct usba_udc *udc, struct usba_ep *ep,
|
|
struct usba_request *req, gfp_t gfp_flags)
|
|
{
|
|
unsigned long flags;
|
|
int ret;
|
|
|
|
DBG(DBG_DMA, "%s: req l/%u d/%08x %c%c%c\n",
|
|
ep->ep.name, req->req.length, req->req.dma,
|
|
req->req.zero ? 'Z' : 'z',
|
|
req->req.short_not_ok ? 'S' : 's',
|
|
req->req.no_interrupt ? 'I' : 'i');
|
|
|
|
if (req->req.length > 0x10000) {
|
|
/* Lengths from 0 to 65536 (inclusive) are supported */
|
|
DBG(DBG_ERR, "invalid request length %u\n", req->req.length);
|
|
return -EINVAL;
|
|
}
|
|
|
|
ret = usb_gadget_map_request(&udc->gadget, &req->req, ep->is_in);
|
|
if (ret)
|
|
return ret;
|
|
|
|
req->using_dma = 1;
|
|
req->ctrl = USBA_BF(DMA_BUF_LEN, req->req.length)
|
|
| USBA_DMA_CH_EN | USBA_DMA_END_BUF_IE
|
|
| USBA_DMA_END_TR_EN | USBA_DMA_END_TR_IE;
|
|
|
|
if (ep->is_in)
|
|
req->ctrl |= USBA_DMA_END_BUF_EN;
|
|
|
|
/*
|
|
* Add this request to the queue and submit for DMA if
|
|
* possible. Check if we're still alive first -- we may have
|
|
* received a reset since last time we checked.
|
|
*/
|
|
ret = -ESHUTDOWN;
|
|
spin_lock_irqsave(&udc->lock, flags);
|
|
if (ep->ep.desc) {
|
|
if (list_empty(&ep->queue))
|
|
submit_request(ep, req);
|
|
|
|
list_add_tail(&req->queue, &ep->queue);
|
|
ret = 0;
|
|
}
|
|
spin_unlock_irqrestore(&udc->lock, flags);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int
|
|
usba_ep_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags)
|
|
{
|
|
struct usba_request *req = to_usba_req(_req);
|
|
struct usba_ep *ep = to_usba_ep(_ep);
|
|
struct usba_udc *udc = ep->udc;
|
|
unsigned long flags;
|
|
int ret;
|
|
|
|
DBG(DBG_GADGET | DBG_QUEUE | DBG_REQ, "%s: queue req %p, len %u\n",
|
|
ep->ep.name, req, _req->length);
|
|
|
|
if (!udc->driver || udc->gadget.speed == USB_SPEED_UNKNOWN ||
|
|
!ep->ep.desc)
|
|
return -ESHUTDOWN;
|
|
|
|
req->submitted = 0;
|
|
req->using_dma = 0;
|
|
req->last_transaction = 0;
|
|
|
|
_req->status = -EINPROGRESS;
|
|
_req->actual = 0;
|
|
|
|
if (ep->can_dma)
|
|
return queue_dma(udc, ep, req, gfp_flags);
|
|
|
|
/* May have received a reset since last time we checked */
|
|
ret = -ESHUTDOWN;
|
|
spin_lock_irqsave(&udc->lock, flags);
|
|
if (ep->ep.desc) {
|
|
list_add_tail(&req->queue, &ep->queue);
|
|
|
|
if ((!ep_is_control(ep) && ep->is_in) ||
|
|
(ep_is_control(ep)
|
|
&& (ep->state == DATA_STAGE_IN
|
|
|| ep->state == STATUS_STAGE_IN)))
|
|
usba_ep_writel(ep, CTL_ENB, USBA_TX_PK_RDY);
|
|
else
|
|
usba_ep_writel(ep, CTL_ENB, USBA_RX_BK_RDY);
|
|
ret = 0;
|
|
}
|
|
spin_unlock_irqrestore(&udc->lock, flags);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void
|
|
usba_update_req(struct usba_ep *ep, struct usba_request *req, u32 status)
|
|
{
|
|
req->req.actual = req->req.length - USBA_BFEXT(DMA_BUF_LEN, status);
|
|
}
|
|
|
|
static int stop_dma(struct usba_ep *ep, u32 *pstatus)
|
|
{
|
|
unsigned int timeout;
|
|
u32 status;
|
|
|
|
/*
|
|
* Stop the DMA controller. When writing both CH_EN
|
|
* and LINK to 0, the other bits are not affected.
|
|
*/
|
|
usba_dma_writel(ep, CONTROL, 0);
|
|
|
|
/* Wait for the FIFO to empty */
|
|
for (timeout = 40; timeout; --timeout) {
|
|
status = usba_dma_readl(ep, STATUS);
|
|
if (!(status & USBA_DMA_CH_EN))
|
|
break;
|
|
udelay(1);
|
|
}
|
|
|
|
if (pstatus)
|
|
*pstatus = status;
|
|
|
|
if (timeout == 0) {
|
|
dev_err(&ep->udc->pdev->dev,
|
|
"%s: timed out waiting for DMA FIFO to empty\n",
|
|
ep->ep.name);
|
|
return -ETIMEDOUT;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int usba_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req)
|
|
{
|
|
struct usba_ep *ep = to_usba_ep(_ep);
|
|
struct usba_udc *udc = ep->udc;
|
|
struct usba_request *req = to_usba_req(_req);
|
|
unsigned long flags;
|
|
u32 status;
|
|
|
|
DBG(DBG_GADGET | DBG_QUEUE, "ep_dequeue: %s, req %p\n",
|
|
ep->ep.name, req);
|
|
|
|
spin_lock_irqsave(&udc->lock, flags);
|
|
|
|
if (req->using_dma) {
|
|
/*
|
|
* If this request is currently being transferred,
|
|
* stop the DMA controller and reset the FIFO.
|
|
*/
|
|
if (ep->queue.next == &req->queue) {
|
|
status = usba_dma_readl(ep, STATUS);
|
|
if (status & USBA_DMA_CH_EN)
|
|
stop_dma(ep, &status);
|
|
|
|
#ifdef CONFIG_USB_GADGET_DEBUG_FS
|
|
ep->last_dma_status = status;
|
|
#endif
|
|
|
|
usba_writel(udc, EPT_RST, 1 << ep->index);
|
|
|
|
usba_update_req(ep, req, status);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Errors should stop the queue from advancing until the
|
|
* completion function returns.
|
|
*/
|
|
list_del_init(&req->queue);
|
|
|
|
request_complete(ep, req, -ECONNRESET);
|
|
|
|
/* Process the next request if any */
|
|
submit_next_request(ep);
|
|
spin_unlock_irqrestore(&udc->lock, flags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int usba_ep_set_halt(struct usb_ep *_ep, int value)
|
|
{
|
|
struct usba_ep *ep = to_usba_ep(_ep);
|
|
struct usba_udc *udc = ep->udc;
|
|
unsigned long flags;
|
|
int ret = 0;
|
|
|
|
DBG(DBG_GADGET, "endpoint %s: %s HALT\n", ep->ep.name,
|
|
value ? "set" : "clear");
|
|
|
|
if (!ep->ep.desc) {
|
|
DBG(DBG_ERR, "Attempted to halt uninitialized ep %s\n",
|
|
ep->ep.name);
|
|
return -ENODEV;
|
|
}
|
|
if (ep->is_isoc) {
|
|
DBG(DBG_ERR, "Attempted to halt isochronous ep %s\n",
|
|
ep->ep.name);
|
|
return -ENOTTY;
|
|
}
|
|
|
|
spin_lock_irqsave(&udc->lock, flags);
|
|
|
|
/*
|
|
* We can't halt IN endpoints while there are still data to be
|
|
* transferred
|
|
*/
|
|
if (!list_empty(&ep->queue)
|
|
|| ((value && ep->is_in && (usba_ep_readl(ep, STA)
|
|
& USBA_BF(BUSY_BANKS, -1L))))) {
|
|
ret = -EAGAIN;
|
|
} else {
|
|
if (value)
|
|
usba_ep_writel(ep, SET_STA, USBA_FORCE_STALL);
|
|
else
|
|
usba_ep_writel(ep, CLR_STA,
|
|
USBA_FORCE_STALL | USBA_TOGGLE_CLR);
|
|
usba_ep_readl(ep, STA);
|
|
}
|
|
|
|
spin_unlock_irqrestore(&udc->lock, flags);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int usba_ep_fifo_status(struct usb_ep *_ep)
|
|
{
|
|
struct usba_ep *ep = to_usba_ep(_ep);
|
|
|
|
return USBA_BFEXT(BYTE_COUNT, usba_ep_readl(ep, STA));
|
|
}
|
|
|
|
static void usba_ep_fifo_flush(struct usb_ep *_ep)
|
|
{
|
|
struct usba_ep *ep = to_usba_ep(_ep);
|
|
struct usba_udc *udc = ep->udc;
|
|
|
|
usba_writel(udc, EPT_RST, 1 << ep->index);
|
|
}
|
|
|
|
static const struct usb_ep_ops usba_ep_ops = {
|
|
.enable = usba_ep_enable,
|
|
.disable = usba_ep_disable,
|
|
.alloc_request = usba_ep_alloc_request,
|
|
.free_request = usba_ep_free_request,
|
|
.queue = usba_ep_queue,
|
|
.dequeue = usba_ep_dequeue,
|
|
.set_halt = usba_ep_set_halt,
|
|
.fifo_status = usba_ep_fifo_status,
|
|
.fifo_flush = usba_ep_fifo_flush,
|
|
};
|
|
|
|
static int usba_udc_get_frame(struct usb_gadget *gadget)
|
|
{
|
|
struct usba_udc *udc = to_usba_udc(gadget);
|
|
|
|
return USBA_BFEXT(FRAME_NUMBER, usba_readl(udc, FNUM));
|
|
}
|
|
|
|
static int usba_udc_wakeup(struct usb_gadget *gadget)
|
|
{
|
|
struct usba_udc *udc = to_usba_udc(gadget);
|
|
unsigned long flags;
|
|
u32 ctrl;
|
|
int ret = -EINVAL;
|
|
|
|
spin_lock_irqsave(&udc->lock, flags);
|
|
if (udc->devstatus & (1 << USB_DEVICE_REMOTE_WAKEUP)) {
|
|
ctrl = usba_readl(udc, CTRL);
|
|
usba_writel(udc, CTRL, ctrl | USBA_REMOTE_WAKE_UP);
|
|
ret = 0;
|
|
}
|
|
spin_unlock_irqrestore(&udc->lock, flags);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int
|
|
usba_udc_set_selfpowered(struct usb_gadget *gadget, int is_selfpowered)
|
|
{
|
|
struct usba_udc *udc = to_usba_udc(gadget);
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&udc->lock, flags);
|
|
if (is_selfpowered)
|
|
udc->devstatus |= 1 << USB_DEVICE_SELF_POWERED;
|
|
else
|
|
udc->devstatus &= ~(1 << USB_DEVICE_SELF_POWERED);
|
|
spin_unlock_irqrestore(&udc->lock, flags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int atmel_usba_start(struct usb_gadget *gadget,
|
|
struct usb_gadget_driver *driver);
|
|
static int atmel_usba_stop(struct usb_gadget *gadget,
|
|
struct usb_gadget_driver *driver);
|
|
static const struct usb_gadget_ops usba_udc_ops = {
|
|
.get_frame = usba_udc_get_frame,
|
|
.wakeup = usba_udc_wakeup,
|
|
.set_selfpowered = usba_udc_set_selfpowered,
|
|
.udc_start = atmel_usba_start,
|
|
.udc_stop = atmel_usba_stop,
|
|
};
|
|
|
|
static struct usb_endpoint_descriptor usba_ep0_desc = {
|
|
.bLength = USB_DT_ENDPOINT_SIZE,
|
|
.bDescriptorType = USB_DT_ENDPOINT,
|
|
.bEndpointAddress = 0,
|
|
.bmAttributes = USB_ENDPOINT_XFER_CONTROL,
|
|
.wMaxPacketSize = cpu_to_le16(64),
|
|
/* FIXME: I have no idea what to put here */
|
|
.bInterval = 1,
|
|
};
|
|
|
|
static void nop_release(struct device *dev)
|
|
{
|
|
|
|
}
|
|
|
|
static struct usb_gadget usba_gadget_template = {
|
|
.ops = &usba_udc_ops,
|
|
.max_speed = USB_SPEED_HIGH,
|
|
.name = "atmel_usba_udc",
|
|
.dev = {
|
|
.init_name = "gadget",
|
|
.release = nop_release,
|
|
},
|
|
};
|
|
|
|
/*
|
|
* Called with interrupts disabled and udc->lock held.
|
|
*/
|
|
static void reset_all_endpoints(struct usba_udc *udc)
|
|
{
|
|
struct usba_ep *ep;
|
|
struct usba_request *req, *tmp_req;
|
|
|
|
usba_writel(udc, EPT_RST, ~0UL);
|
|
|
|
ep = to_usba_ep(udc->gadget.ep0);
|
|
list_for_each_entry_safe(req, tmp_req, &ep->queue, queue) {
|
|
list_del_init(&req->queue);
|
|
request_complete(ep, req, -ECONNRESET);
|
|
}
|
|
|
|
/* NOTE: normally, the next call to the gadget driver is in
|
|
* charge of disabling endpoints... usually disconnect().
|
|
* The exception would be entering a high speed test mode.
|
|
*
|
|
* FIXME remove this code ... and retest thoroughly.
|
|
*/
|
|
list_for_each_entry(ep, &udc->gadget.ep_list, ep.ep_list) {
|
|
if (ep->ep.desc) {
|
|
spin_unlock(&udc->lock);
|
|
usba_ep_disable(&ep->ep);
|
|
spin_lock(&udc->lock);
|
|
}
|
|
}
|
|
}
|
|
|
|
static struct usba_ep *get_ep_by_addr(struct usba_udc *udc, u16 wIndex)
|
|
{
|
|
struct usba_ep *ep;
|
|
|
|
if ((wIndex & USB_ENDPOINT_NUMBER_MASK) == 0)
|
|
return to_usba_ep(udc->gadget.ep0);
|
|
|
|
list_for_each_entry (ep, &udc->gadget.ep_list, ep.ep_list) {
|
|
u8 bEndpointAddress;
|
|
|
|
if (!ep->ep.desc)
|
|
continue;
|
|
bEndpointAddress = ep->ep.desc->bEndpointAddress;
|
|
if ((wIndex ^ bEndpointAddress) & USB_DIR_IN)
|
|
continue;
|
|
if ((bEndpointAddress & USB_ENDPOINT_NUMBER_MASK)
|
|
== (wIndex & USB_ENDPOINT_NUMBER_MASK))
|
|
return ep;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/* Called with interrupts disabled and udc->lock held */
|
|
static inline void set_protocol_stall(struct usba_udc *udc, struct usba_ep *ep)
|
|
{
|
|
usba_ep_writel(ep, SET_STA, USBA_FORCE_STALL);
|
|
ep->state = WAIT_FOR_SETUP;
|
|
}
|
|
|
|
static inline int is_stalled(struct usba_udc *udc, struct usba_ep *ep)
|
|
{
|
|
if (usba_ep_readl(ep, STA) & USBA_FORCE_STALL)
|
|
return 1;
|
|
return 0;
|
|
}
|
|
|
|
static inline void set_address(struct usba_udc *udc, unsigned int addr)
|
|
{
|
|
u32 regval;
|
|
|
|
DBG(DBG_BUS, "setting address %u...\n", addr);
|
|
regval = usba_readl(udc, CTRL);
|
|
regval = USBA_BFINS(DEV_ADDR, addr, regval);
|
|
usba_writel(udc, CTRL, regval);
|
|
}
|
|
|
|
static int do_test_mode(struct usba_udc *udc)
|
|
{
|
|
static const char test_packet_buffer[] = {
|
|
/* JKJKJKJK * 9 */
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
/* JJKKJJKK * 8 */
|
|
0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA,
|
|
/* JJKKJJKK * 8 */
|
|
0xEE, 0xEE, 0xEE, 0xEE, 0xEE, 0xEE, 0xEE, 0xEE,
|
|
/* JJJJJJJKKKKKKK * 8 */
|
|
0xFE, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
|
|
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
|
|
/* JJJJJJJK * 8 */
|
|
0x7F, 0xBF, 0xDF, 0xEF, 0xF7, 0xFB, 0xFD,
|
|
/* {JKKKKKKK * 10}, JK */
|
|
0xFC, 0x7E, 0xBF, 0xDF, 0xEF, 0xF7, 0xFB, 0xFD, 0x7E
|
|
};
|
|
struct usba_ep *ep;
|
|
struct device *dev = &udc->pdev->dev;
|
|
int test_mode;
|
|
|
|
test_mode = udc->test_mode;
|
|
|
|
/* Start from a clean slate */
|
|
reset_all_endpoints(udc);
|
|
|
|
switch (test_mode) {
|
|
case 0x0100:
|
|
/* Test_J */
|
|
usba_writel(udc, TST, USBA_TST_J_MODE);
|
|
dev_info(dev, "Entering Test_J mode...\n");
|
|
break;
|
|
case 0x0200:
|
|
/* Test_K */
|
|
usba_writel(udc, TST, USBA_TST_K_MODE);
|
|
dev_info(dev, "Entering Test_K mode...\n");
|
|
break;
|
|
case 0x0300:
|
|
/*
|
|
* Test_SE0_NAK: Force high-speed mode and set up ep0
|
|
* for Bulk IN transfers
|
|
*/
|
|
ep = &udc->usba_ep[0];
|
|
usba_writel(udc, TST,
|
|
USBA_BF(SPEED_CFG, USBA_SPEED_CFG_FORCE_HIGH));
|
|
usba_ep_writel(ep, CFG,
|
|
USBA_BF(EPT_SIZE, USBA_EPT_SIZE_64)
|
|
| USBA_EPT_DIR_IN
|
|
| USBA_BF(EPT_TYPE, USBA_EPT_TYPE_BULK)
|
|
| USBA_BF(BK_NUMBER, 1));
|
|
if (!(usba_ep_readl(ep, CFG) & USBA_EPT_MAPPED)) {
|
|
set_protocol_stall(udc, ep);
|
|
dev_err(dev, "Test_SE0_NAK: ep0 not mapped\n");
|
|
} else {
|
|
usba_ep_writel(ep, CTL_ENB, USBA_EPT_ENABLE);
|
|
dev_info(dev, "Entering Test_SE0_NAK mode...\n");
|
|
}
|
|
break;
|
|
case 0x0400:
|
|
/* Test_Packet */
|
|
ep = &udc->usba_ep[0];
|
|
usba_ep_writel(ep, CFG,
|
|
USBA_BF(EPT_SIZE, USBA_EPT_SIZE_64)
|
|
| USBA_EPT_DIR_IN
|
|
| USBA_BF(EPT_TYPE, USBA_EPT_TYPE_BULK)
|
|
| USBA_BF(BK_NUMBER, 1));
|
|
if (!(usba_ep_readl(ep, CFG) & USBA_EPT_MAPPED)) {
|
|
set_protocol_stall(udc, ep);
|
|
dev_err(dev, "Test_Packet: ep0 not mapped\n");
|
|
} else {
|
|
usba_ep_writel(ep, CTL_ENB, USBA_EPT_ENABLE);
|
|
usba_writel(udc, TST, USBA_TST_PKT_MODE);
|
|
memcpy_toio(ep->fifo, test_packet_buffer,
|
|
sizeof(test_packet_buffer));
|
|
usba_ep_writel(ep, SET_STA, USBA_TX_PK_RDY);
|
|
dev_info(dev, "Entering Test_Packet mode...\n");
|
|
}
|
|
break;
|
|
default:
|
|
dev_err(dev, "Invalid test mode: 0x%04x\n", test_mode);
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Avoid overly long expressions */
|
|
static inline bool feature_is_dev_remote_wakeup(struct usb_ctrlrequest *crq)
|
|
{
|
|
if (crq->wValue == cpu_to_le16(USB_DEVICE_REMOTE_WAKEUP))
|
|
return true;
|
|
return false;
|
|
}
|
|
|
|
static inline bool feature_is_dev_test_mode(struct usb_ctrlrequest *crq)
|
|
{
|
|
if (crq->wValue == cpu_to_le16(USB_DEVICE_TEST_MODE))
|
|
return true;
|
|
return false;
|
|
}
|
|
|
|
static inline bool feature_is_ep_halt(struct usb_ctrlrequest *crq)
|
|
{
|
|
if (crq->wValue == cpu_to_le16(USB_ENDPOINT_HALT))
|
|
return true;
|
|
return false;
|
|
}
|
|
|
|
static int handle_ep0_setup(struct usba_udc *udc, struct usba_ep *ep,
|
|
struct usb_ctrlrequest *crq)
|
|
{
|
|
int retval = 0;
|
|
|
|
switch (crq->bRequest) {
|
|
case USB_REQ_GET_STATUS: {
|
|
u16 status;
|
|
|
|
if (crq->bRequestType == (USB_DIR_IN | USB_RECIP_DEVICE)) {
|
|
status = cpu_to_le16(udc->devstatus);
|
|
} else if (crq->bRequestType
|
|
== (USB_DIR_IN | USB_RECIP_INTERFACE)) {
|
|
status = cpu_to_le16(0);
|
|
} else if (crq->bRequestType
|
|
== (USB_DIR_IN | USB_RECIP_ENDPOINT)) {
|
|
struct usba_ep *target;
|
|
|
|
target = get_ep_by_addr(udc, le16_to_cpu(crq->wIndex));
|
|
if (!target)
|
|
goto stall;
|
|
|
|
status = 0;
|
|
if (is_stalled(udc, target))
|
|
status |= cpu_to_le16(1);
|
|
} else
|
|
goto delegate;
|
|
|
|
/* Write directly to the FIFO. No queueing is done. */
|
|
if (crq->wLength != cpu_to_le16(sizeof(status)))
|
|
goto stall;
|
|
ep->state = DATA_STAGE_IN;
|
|
__raw_writew(status, ep->fifo);
|
|
usba_ep_writel(ep, SET_STA, USBA_TX_PK_RDY);
|
|
break;
|
|
}
|
|
|
|
case USB_REQ_CLEAR_FEATURE: {
|
|
if (crq->bRequestType == USB_RECIP_DEVICE) {
|
|
if (feature_is_dev_remote_wakeup(crq))
|
|
udc->devstatus
|
|
&= ~(1 << USB_DEVICE_REMOTE_WAKEUP);
|
|
else
|
|
/* Can't CLEAR_FEATURE TEST_MODE */
|
|
goto stall;
|
|
} else if (crq->bRequestType == USB_RECIP_ENDPOINT) {
|
|
struct usba_ep *target;
|
|
|
|
if (crq->wLength != cpu_to_le16(0)
|
|
|| !feature_is_ep_halt(crq))
|
|
goto stall;
|
|
target = get_ep_by_addr(udc, le16_to_cpu(crq->wIndex));
|
|
if (!target)
|
|
goto stall;
|
|
|
|
usba_ep_writel(target, CLR_STA, USBA_FORCE_STALL);
|
|
if (target->index != 0)
|
|
usba_ep_writel(target, CLR_STA,
|
|
USBA_TOGGLE_CLR);
|
|
} else {
|
|
goto delegate;
|
|
}
|
|
|
|
send_status(udc, ep);
|
|
break;
|
|
}
|
|
|
|
case USB_REQ_SET_FEATURE: {
|
|
if (crq->bRequestType == USB_RECIP_DEVICE) {
|
|
if (feature_is_dev_test_mode(crq)) {
|
|
send_status(udc, ep);
|
|
ep->state = STATUS_STAGE_TEST;
|
|
udc->test_mode = le16_to_cpu(crq->wIndex);
|
|
return 0;
|
|
} else if (feature_is_dev_remote_wakeup(crq)) {
|
|
udc->devstatus |= 1 << USB_DEVICE_REMOTE_WAKEUP;
|
|
} else {
|
|
goto stall;
|
|
}
|
|
} else if (crq->bRequestType == USB_RECIP_ENDPOINT) {
|
|
struct usba_ep *target;
|
|
|
|
if (crq->wLength != cpu_to_le16(0)
|
|
|| !feature_is_ep_halt(crq))
|
|
goto stall;
|
|
|
|
target = get_ep_by_addr(udc, le16_to_cpu(crq->wIndex));
|
|
if (!target)
|
|
goto stall;
|
|
|
|
usba_ep_writel(target, SET_STA, USBA_FORCE_STALL);
|
|
} else
|
|
goto delegate;
|
|
|
|
send_status(udc, ep);
|
|
break;
|
|
}
|
|
|
|
case USB_REQ_SET_ADDRESS:
|
|
if (crq->bRequestType != (USB_DIR_OUT | USB_RECIP_DEVICE))
|
|
goto delegate;
|
|
|
|
set_address(udc, le16_to_cpu(crq->wValue));
|
|
send_status(udc, ep);
|
|
ep->state = STATUS_STAGE_ADDR;
|
|
break;
|
|
|
|
default:
|
|
delegate:
|
|
spin_unlock(&udc->lock);
|
|
retval = udc->driver->setup(&udc->gadget, crq);
|
|
spin_lock(&udc->lock);
|
|
}
|
|
|
|
return retval;
|
|
|
|
stall:
|
|
pr_err("udc: %s: Invalid setup request: %02x.%02x v%04x i%04x l%d, "
|
|
"halting endpoint...\n",
|
|
ep->ep.name, crq->bRequestType, crq->bRequest,
|
|
le16_to_cpu(crq->wValue), le16_to_cpu(crq->wIndex),
|
|
le16_to_cpu(crq->wLength));
|
|
set_protocol_stall(udc, ep);
|
|
return -1;
|
|
}
|
|
|
|
static void usba_control_irq(struct usba_udc *udc, struct usba_ep *ep)
|
|
{
|
|
struct usba_request *req;
|
|
u32 epstatus;
|
|
u32 epctrl;
|
|
|
|
restart:
|
|
epstatus = usba_ep_readl(ep, STA);
|
|
epctrl = usba_ep_readl(ep, CTL);
|
|
|
|
DBG(DBG_INT, "%s [%d]: s/%08x c/%08x\n",
|
|
ep->ep.name, ep->state, epstatus, epctrl);
|
|
|
|
req = NULL;
|
|
if (!list_empty(&ep->queue))
|
|
req = list_entry(ep->queue.next,
|
|
struct usba_request, queue);
|
|
|
|
if ((epctrl & USBA_TX_PK_RDY) && !(epstatus & USBA_TX_PK_RDY)) {
|
|
if (req->submitted)
|
|
next_fifo_transaction(ep, req);
|
|
else
|
|
submit_request(ep, req);
|
|
|
|
if (req->last_transaction) {
|
|
usba_ep_writel(ep, CTL_DIS, USBA_TX_PK_RDY);
|
|
usba_ep_writel(ep, CTL_ENB, USBA_TX_COMPLETE);
|
|
}
|
|
goto restart;
|
|
}
|
|
if ((epstatus & epctrl) & USBA_TX_COMPLETE) {
|
|
usba_ep_writel(ep, CLR_STA, USBA_TX_COMPLETE);
|
|
|
|
switch (ep->state) {
|
|
case DATA_STAGE_IN:
|
|
usba_ep_writel(ep, CTL_ENB, USBA_RX_BK_RDY);
|
|
usba_ep_writel(ep, CTL_DIS, USBA_TX_COMPLETE);
|
|
ep->state = STATUS_STAGE_OUT;
|
|
break;
|
|
case STATUS_STAGE_ADDR:
|
|
/* Activate our new address */
|
|
usba_writel(udc, CTRL, (usba_readl(udc, CTRL)
|
|
| USBA_FADDR_EN));
|
|
usba_ep_writel(ep, CTL_DIS, USBA_TX_COMPLETE);
|
|
ep->state = WAIT_FOR_SETUP;
|
|
break;
|
|
case STATUS_STAGE_IN:
|
|
if (req) {
|
|
list_del_init(&req->queue);
|
|
request_complete(ep, req, 0);
|
|
submit_next_request(ep);
|
|
}
|
|
usba_ep_writel(ep, CTL_DIS, USBA_TX_COMPLETE);
|
|
ep->state = WAIT_FOR_SETUP;
|
|
break;
|
|
case STATUS_STAGE_TEST:
|
|
usba_ep_writel(ep, CTL_DIS, USBA_TX_COMPLETE);
|
|
ep->state = WAIT_FOR_SETUP;
|
|
if (do_test_mode(udc))
|
|
set_protocol_stall(udc, ep);
|
|
break;
|
|
default:
|
|
pr_err("udc: %s: TXCOMP: Invalid endpoint state %d, "
|
|
"halting endpoint...\n",
|
|
ep->ep.name, ep->state);
|
|
set_protocol_stall(udc, ep);
|
|
break;
|
|
}
|
|
|
|
goto restart;
|
|
}
|
|
if ((epstatus & epctrl) & USBA_RX_BK_RDY) {
|
|
switch (ep->state) {
|
|
case STATUS_STAGE_OUT:
|
|
usba_ep_writel(ep, CLR_STA, USBA_RX_BK_RDY);
|
|
usba_ep_writel(ep, CTL_DIS, USBA_RX_BK_RDY);
|
|
|
|
if (req) {
|
|
list_del_init(&req->queue);
|
|
request_complete(ep, req, 0);
|
|
}
|
|
ep->state = WAIT_FOR_SETUP;
|
|
break;
|
|
|
|
case DATA_STAGE_OUT:
|
|
receive_data(ep);
|
|
break;
|
|
|
|
default:
|
|
usba_ep_writel(ep, CLR_STA, USBA_RX_BK_RDY);
|
|
usba_ep_writel(ep, CTL_DIS, USBA_RX_BK_RDY);
|
|
pr_err("udc: %s: RXRDY: Invalid endpoint state %d, "
|
|
"halting endpoint...\n",
|
|
ep->ep.name, ep->state);
|
|
set_protocol_stall(udc, ep);
|
|
break;
|
|
}
|
|
|
|
goto restart;
|
|
}
|
|
if (epstatus & USBA_RX_SETUP) {
|
|
union {
|
|
struct usb_ctrlrequest crq;
|
|
unsigned long data[2];
|
|
} crq;
|
|
unsigned int pkt_len;
|
|
int ret;
|
|
|
|
if (ep->state != WAIT_FOR_SETUP) {
|
|
/*
|
|
* Didn't expect a SETUP packet at this
|
|
* point. Clean up any pending requests (which
|
|
* may be successful).
|
|
*/
|
|
int status = -EPROTO;
|
|
|
|
/*
|
|
* RXRDY and TXCOMP are dropped when SETUP
|
|
* packets arrive. Just pretend we received
|
|
* the status packet.
|
|
*/
|
|
if (ep->state == STATUS_STAGE_OUT
|
|
|| ep->state == STATUS_STAGE_IN) {
|
|
usba_ep_writel(ep, CTL_DIS, USBA_RX_BK_RDY);
|
|
status = 0;
|
|
}
|
|
|
|
if (req) {
|
|
list_del_init(&req->queue);
|
|
request_complete(ep, req, status);
|
|
}
|
|
}
|
|
|
|
pkt_len = USBA_BFEXT(BYTE_COUNT, usba_ep_readl(ep, STA));
|
|
DBG(DBG_HW, "Packet length: %u\n", pkt_len);
|
|
if (pkt_len != sizeof(crq)) {
|
|
pr_warning("udc: Invalid packet length %u "
|
|
"(expected %zu)\n", pkt_len, sizeof(crq));
|
|
set_protocol_stall(udc, ep);
|
|
return;
|
|
}
|
|
|
|
DBG(DBG_FIFO, "Copying ctrl request from 0x%p:\n", ep->fifo);
|
|
memcpy_fromio(crq.data, ep->fifo, sizeof(crq));
|
|
|
|
/* Free up one bank in the FIFO so that we can
|
|
* generate or receive a reply right away. */
|
|
usba_ep_writel(ep, CLR_STA, USBA_RX_SETUP);
|
|
|
|
/* printk(KERN_DEBUG "setup: %d: %02x.%02x\n",
|
|
ep->state, crq.crq.bRequestType,
|
|
crq.crq.bRequest); */
|
|
|
|
if (crq.crq.bRequestType & USB_DIR_IN) {
|
|
/*
|
|
* The USB 2.0 spec states that "if wLength is
|
|
* zero, there is no data transfer phase."
|
|
* However, testusb #14 seems to actually
|
|
* expect a data phase even if wLength = 0...
|
|
*/
|
|
ep->state = DATA_STAGE_IN;
|
|
} else {
|
|
if (crq.crq.wLength != cpu_to_le16(0))
|
|
ep->state = DATA_STAGE_OUT;
|
|
else
|
|
ep->state = STATUS_STAGE_IN;
|
|
}
|
|
|
|
ret = -1;
|
|
if (ep->index == 0)
|
|
ret = handle_ep0_setup(udc, ep, &crq.crq);
|
|
else {
|
|
spin_unlock(&udc->lock);
|
|
ret = udc->driver->setup(&udc->gadget, &crq.crq);
|
|
spin_lock(&udc->lock);
|
|
}
|
|
|
|
DBG(DBG_BUS, "req %02x.%02x, length %d, state %d, ret %d\n",
|
|
crq.crq.bRequestType, crq.crq.bRequest,
|
|
le16_to_cpu(crq.crq.wLength), ep->state, ret);
|
|
|
|
if (ret < 0) {
|
|
/* Let the host know that we failed */
|
|
set_protocol_stall(udc, ep);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void usba_ep_irq(struct usba_udc *udc, struct usba_ep *ep)
|
|
{
|
|
struct usba_request *req;
|
|
u32 epstatus;
|
|
u32 epctrl;
|
|
|
|
epstatus = usba_ep_readl(ep, STA);
|
|
epctrl = usba_ep_readl(ep, CTL);
|
|
|
|
DBG(DBG_INT, "%s: interrupt, status: 0x%08x\n", ep->ep.name, epstatus);
|
|
|
|
while ((epctrl & USBA_TX_PK_RDY) && !(epstatus & USBA_TX_PK_RDY)) {
|
|
DBG(DBG_BUS, "%s: TX PK ready\n", ep->ep.name);
|
|
|
|
if (list_empty(&ep->queue)) {
|
|
dev_warn(&udc->pdev->dev, "ep_irq: queue empty\n");
|
|
usba_ep_writel(ep, CTL_DIS, USBA_TX_PK_RDY);
|
|
return;
|
|
}
|
|
|
|
req = list_entry(ep->queue.next, struct usba_request, queue);
|
|
|
|
if (req->using_dma) {
|
|
/* Send a zero-length packet */
|
|
usba_ep_writel(ep, SET_STA,
|
|
USBA_TX_PK_RDY);
|
|
usba_ep_writel(ep, CTL_DIS,
|
|
USBA_TX_PK_RDY);
|
|
list_del_init(&req->queue);
|
|
submit_next_request(ep);
|
|
request_complete(ep, req, 0);
|
|
} else {
|
|
if (req->submitted)
|
|
next_fifo_transaction(ep, req);
|
|
else
|
|
submit_request(ep, req);
|
|
|
|
if (req->last_transaction) {
|
|
list_del_init(&req->queue);
|
|
submit_next_request(ep);
|
|
request_complete(ep, req, 0);
|
|
}
|
|
}
|
|
|
|
epstatus = usba_ep_readl(ep, STA);
|
|
epctrl = usba_ep_readl(ep, CTL);
|
|
}
|
|
if ((epstatus & epctrl) & USBA_RX_BK_RDY) {
|
|
DBG(DBG_BUS, "%s: RX data ready\n", ep->ep.name);
|
|
receive_data(ep);
|
|
usba_ep_writel(ep, CLR_STA, USBA_RX_BK_RDY);
|
|
}
|
|
}
|
|
|
|
static void usba_dma_irq(struct usba_udc *udc, struct usba_ep *ep)
|
|
{
|
|
struct usba_request *req;
|
|
u32 status, control, pending;
|
|
|
|
status = usba_dma_readl(ep, STATUS);
|
|
control = usba_dma_readl(ep, CONTROL);
|
|
#ifdef CONFIG_USB_GADGET_DEBUG_FS
|
|
ep->last_dma_status = status;
|
|
#endif
|
|
pending = status & control;
|
|
DBG(DBG_INT | DBG_DMA, "dma irq, s/%#08x, c/%#08x\n", status, control);
|
|
|
|
if (status & USBA_DMA_CH_EN) {
|
|
dev_err(&udc->pdev->dev,
|
|
"DMA_CH_EN is set after transfer is finished!\n");
|
|
dev_err(&udc->pdev->dev,
|
|
"status=%#08x, pending=%#08x, control=%#08x\n",
|
|
status, pending, control);
|
|
|
|
/*
|
|
* try to pretend nothing happened. We might have to
|
|
* do something here...
|
|
*/
|
|
}
|
|
|
|
if (list_empty(&ep->queue))
|
|
/* Might happen if a reset comes along at the right moment */
|
|
return;
|
|
|
|
if (pending & (USBA_DMA_END_TR_ST | USBA_DMA_END_BUF_ST)) {
|
|
req = list_entry(ep->queue.next, struct usba_request, queue);
|
|
usba_update_req(ep, req, status);
|
|
|
|
list_del_init(&req->queue);
|
|
submit_next_request(ep);
|
|
request_complete(ep, req, 0);
|
|
}
|
|
}
|
|
|
|
static irqreturn_t usba_udc_irq(int irq, void *devid)
|
|
{
|
|
struct usba_udc *udc = devid;
|
|
u32 status;
|
|
u32 dma_status;
|
|
u32 ep_status;
|
|
|
|
spin_lock(&udc->lock);
|
|
|
|
status = usba_readl(udc, INT_STA);
|
|
DBG(DBG_INT, "irq, status=%#08x\n", status);
|
|
|
|
if (status & USBA_DET_SUSPEND) {
|
|
toggle_bias(0);
|
|
usba_writel(udc, INT_CLR, USBA_DET_SUSPEND);
|
|
DBG(DBG_BUS, "Suspend detected\n");
|
|
if (udc->gadget.speed != USB_SPEED_UNKNOWN
|
|
&& udc->driver && udc->driver->suspend) {
|
|
spin_unlock(&udc->lock);
|
|
udc->driver->suspend(&udc->gadget);
|
|
spin_lock(&udc->lock);
|
|
}
|
|
}
|
|
|
|
if (status & USBA_WAKE_UP) {
|
|
toggle_bias(1);
|
|
usba_writel(udc, INT_CLR, USBA_WAKE_UP);
|
|
DBG(DBG_BUS, "Wake Up CPU detected\n");
|
|
}
|
|
|
|
if (status & USBA_END_OF_RESUME) {
|
|
usba_writel(udc, INT_CLR, USBA_END_OF_RESUME);
|
|
DBG(DBG_BUS, "Resume detected\n");
|
|
if (udc->gadget.speed != USB_SPEED_UNKNOWN
|
|
&& udc->driver && udc->driver->resume) {
|
|
spin_unlock(&udc->lock);
|
|
udc->driver->resume(&udc->gadget);
|
|
spin_lock(&udc->lock);
|
|
}
|
|
}
|
|
|
|
dma_status = USBA_BFEXT(DMA_INT, status);
|
|
if (dma_status) {
|
|
int i;
|
|
|
|
for (i = 1; i < USBA_NR_ENDPOINTS; i++)
|
|
if (dma_status & (1 << i))
|
|
usba_dma_irq(udc, &udc->usba_ep[i]);
|
|
}
|
|
|
|
ep_status = USBA_BFEXT(EPT_INT, status);
|
|
if (ep_status) {
|
|
int i;
|
|
|
|
for (i = 0; i < USBA_NR_ENDPOINTS; i++)
|
|
if (ep_status & (1 << i)) {
|
|
if (ep_is_control(&udc->usba_ep[i]))
|
|
usba_control_irq(udc, &udc->usba_ep[i]);
|
|
else
|
|
usba_ep_irq(udc, &udc->usba_ep[i]);
|
|
}
|
|
}
|
|
|
|
if (status & USBA_END_OF_RESET) {
|
|
struct usba_ep *ep0;
|
|
|
|
usba_writel(udc, INT_CLR, USBA_END_OF_RESET);
|
|
reset_all_endpoints(udc);
|
|
|
|
if (udc->gadget.speed != USB_SPEED_UNKNOWN
|
|
&& udc->driver->disconnect) {
|
|
udc->gadget.speed = USB_SPEED_UNKNOWN;
|
|
spin_unlock(&udc->lock);
|
|
udc->driver->disconnect(&udc->gadget);
|
|
spin_lock(&udc->lock);
|
|
}
|
|
|
|
if (status & USBA_HIGH_SPEED)
|
|
udc->gadget.speed = USB_SPEED_HIGH;
|
|
else
|
|
udc->gadget.speed = USB_SPEED_FULL;
|
|
DBG(DBG_BUS, "%s bus reset detected\n",
|
|
usb_speed_string(udc->gadget.speed));
|
|
|
|
ep0 = &udc->usba_ep[0];
|
|
ep0->ep.desc = &usba_ep0_desc;
|
|
ep0->state = WAIT_FOR_SETUP;
|
|
usba_ep_writel(ep0, CFG,
|
|
(USBA_BF(EPT_SIZE, EP0_EPT_SIZE)
|
|
| USBA_BF(EPT_TYPE, USBA_EPT_TYPE_CONTROL)
|
|
| USBA_BF(BK_NUMBER, USBA_BK_NUMBER_ONE)));
|
|
usba_ep_writel(ep0, CTL_ENB,
|
|
USBA_EPT_ENABLE | USBA_RX_SETUP);
|
|
usba_writel(udc, INT_ENB,
|
|
(usba_readl(udc, INT_ENB)
|
|
| USBA_BF(EPT_INT, 1)
|
|
| USBA_DET_SUSPEND
|
|
| USBA_END_OF_RESUME));
|
|
|
|
/*
|
|
* Unclear why we hit this irregularly, e.g. in usbtest,
|
|
* but it's clearly harmless...
|
|
*/
|
|
if (!(usba_ep_readl(ep0, CFG) & USBA_EPT_MAPPED))
|
|
dev_dbg(&udc->pdev->dev,
|
|
"ODD: EP0 configuration is invalid!\n");
|
|
}
|
|
|
|
spin_unlock(&udc->lock);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static irqreturn_t usba_vbus_irq(int irq, void *devid)
|
|
{
|
|
struct usba_udc *udc = devid;
|
|
int vbus;
|
|
|
|
/* debounce */
|
|
udelay(10);
|
|
|
|
spin_lock(&udc->lock);
|
|
|
|
/* May happen if Vbus pin toggles during probe() */
|
|
if (!udc->driver)
|
|
goto out;
|
|
|
|
vbus = vbus_is_present(udc);
|
|
if (vbus != udc->vbus_prev) {
|
|
if (vbus) {
|
|
toggle_bias(1);
|
|
usba_writel(udc, CTRL, USBA_ENABLE_MASK);
|
|
usba_writel(udc, INT_ENB, USBA_END_OF_RESET);
|
|
} else {
|
|
udc->gadget.speed = USB_SPEED_UNKNOWN;
|
|
reset_all_endpoints(udc);
|
|
toggle_bias(0);
|
|
usba_writel(udc, CTRL, USBA_DISABLE_MASK);
|
|
if (udc->driver->disconnect) {
|
|
spin_unlock(&udc->lock);
|
|
udc->driver->disconnect(&udc->gadget);
|
|
spin_lock(&udc->lock);
|
|
}
|
|
}
|
|
udc->vbus_prev = vbus;
|
|
}
|
|
|
|
out:
|
|
spin_unlock(&udc->lock);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static int atmel_usba_start(struct usb_gadget *gadget,
|
|
struct usb_gadget_driver *driver)
|
|
{
|
|
int ret;
|
|
struct usba_udc *udc = container_of(gadget, struct usba_udc, gadget);
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&udc->lock, flags);
|
|
|
|
udc->devstatus = 1 << USB_DEVICE_SELF_POWERED;
|
|
udc->driver = driver;
|
|
spin_unlock_irqrestore(&udc->lock, flags);
|
|
|
|
ret = clk_prepare_enable(udc->pclk);
|
|
if (ret)
|
|
return ret;
|
|
ret = clk_prepare_enable(udc->hclk);
|
|
if (ret) {
|
|
clk_disable_unprepare(udc->pclk);
|
|
return ret;
|
|
}
|
|
|
|
DBG(DBG_GADGET, "registered driver `%s'\n", driver->driver.name);
|
|
|
|
udc->vbus_prev = 0;
|
|
if (gpio_is_valid(udc->vbus_pin))
|
|
enable_irq(gpio_to_irq(udc->vbus_pin));
|
|
|
|
/* If Vbus is present, enable the controller and wait for reset */
|
|
spin_lock_irqsave(&udc->lock, flags);
|
|
if (vbus_is_present(udc) && udc->vbus_prev == 0) {
|
|
toggle_bias(1);
|
|
usba_writel(udc, CTRL, USBA_ENABLE_MASK);
|
|
usba_writel(udc, INT_ENB, USBA_END_OF_RESET);
|
|
}
|
|
spin_unlock_irqrestore(&udc->lock, flags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int atmel_usba_stop(struct usb_gadget *gadget,
|
|
struct usb_gadget_driver *driver)
|
|
{
|
|
struct usba_udc *udc = container_of(gadget, struct usba_udc, gadget);
|
|
unsigned long flags;
|
|
|
|
if (gpio_is_valid(udc->vbus_pin))
|
|
disable_irq(gpio_to_irq(udc->vbus_pin));
|
|
|
|
spin_lock_irqsave(&udc->lock, flags);
|
|
udc->gadget.speed = USB_SPEED_UNKNOWN;
|
|
reset_all_endpoints(udc);
|
|
spin_unlock_irqrestore(&udc->lock, flags);
|
|
|
|
/* This will also disable the DP pullup */
|
|
toggle_bias(0);
|
|
usba_writel(udc, CTRL, USBA_DISABLE_MASK);
|
|
|
|
udc->driver = NULL;
|
|
|
|
clk_disable_unprepare(udc->hclk);
|
|
clk_disable_unprepare(udc->pclk);
|
|
|
|
DBG(DBG_GADGET, "unregistered driver `%s'\n", driver->driver.name);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_OF
|
|
static struct usba_ep * atmel_udc_of_init(struct platform_device *pdev,
|
|
struct usba_udc *udc)
|
|
{
|
|
u32 val;
|
|
const char *name;
|
|
enum of_gpio_flags flags;
|
|
struct device_node *np = pdev->dev.of_node;
|
|
struct device_node *pp;
|
|
int i, ret;
|
|
struct usba_ep *eps, *ep;
|
|
|
|
udc->num_ep = 0;
|
|
|
|
udc->vbus_pin = of_get_named_gpio_flags(np, "atmel,vbus-gpio", 0,
|
|
&flags);
|
|
udc->vbus_pin_inverted = (flags & OF_GPIO_ACTIVE_LOW) ? 1 : 0;
|
|
|
|
pp = NULL;
|
|
while ((pp = of_get_next_child(np, pp)))
|
|
udc->num_ep++;
|
|
|
|
eps = devm_kzalloc(&pdev->dev, sizeof(struct usba_ep) * udc->num_ep,
|
|
GFP_KERNEL);
|
|
if (!eps)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
udc->gadget.ep0 = &eps[0].ep;
|
|
|
|
INIT_LIST_HEAD(&eps[0].ep.ep_list);
|
|
|
|
pp = NULL;
|
|
i = 0;
|
|
while ((pp = of_get_next_child(np, pp))) {
|
|
ep = &eps[i];
|
|
|
|
ret = of_property_read_u32(pp, "reg", &val);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "of_probe: reg error(%d)\n", ret);
|
|
goto err;
|
|
}
|
|
ep->index = val;
|
|
|
|
ret = of_property_read_u32(pp, "atmel,fifo-size", &val);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "of_probe: fifo-size error(%d)\n", ret);
|
|
goto err;
|
|
}
|
|
ep->fifo_size = val;
|
|
|
|
ret = of_property_read_u32(pp, "atmel,nb-banks", &val);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "of_probe: nb-banks error(%d)\n", ret);
|
|
goto err;
|
|
}
|
|
ep->nr_banks = val;
|
|
|
|
ep->can_dma = of_property_read_bool(pp, "atmel,can-dma");
|
|
ep->can_isoc = of_property_read_bool(pp, "atmel,can-isoc");
|
|
|
|
ret = of_property_read_string(pp, "name", &name);
|
|
ep->ep.name = name;
|
|
|
|
ep->ep_regs = udc->regs + USBA_EPT_BASE(i);
|
|
ep->dma_regs = udc->regs + USBA_DMA_BASE(i);
|
|
ep->fifo = udc->fifo + USBA_FIFO_BASE(i);
|
|
ep->ep.ops = &usba_ep_ops;
|
|
usb_ep_set_maxpacket_limit(&ep->ep, ep->fifo_size);
|
|
ep->udc = udc;
|
|
INIT_LIST_HEAD(&ep->queue);
|
|
|
|
if (i)
|
|
list_add_tail(&ep->ep.ep_list, &udc->gadget.ep_list);
|
|
|
|
i++;
|
|
}
|
|
|
|
return eps;
|
|
err:
|
|
return ERR_PTR(ret);
|
|
}
|
|
#else
|
|
static struct usba_ep * atmel_udc_of_init(struct platform_device *pdev,
|
|
struct usba_udc *udc)
|
|
{
|
|
return ERR_PTR(-ENOSYS);
|
|
}
|
|
#endif
|
|
|
|
static struct usba_ep * usba_udc_pdata(struct platform_device *pdev,
|
|
struct usba_udc *udc)
|
|
{
|
|
struct usba_platform_data *pdata = dev_get_platdata(&pdev->dev);
|
|
struct usba_ep *eps;
|
|
int i;
|
|
|
|
if (!pdata)
|
|
return ERR_PTR(-ENXIO);
|
|
|
|
eps = devm_kzalloc(&pdev->dev, sizeof(struct usba_ep) * pdata->num_ep,
|
|
GFP_KERNEL);
|
|
if (!eps)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
udc->gadget.ep0 = &eps[0].ep;
|
|
|
|
udc->vbus_pin = pdata->vbus_pin;
|
|
udc->vbus_pin_inverted = pdata->vbus_pin_inverted;
|
|
udc->num_ep = pdata->num_ep;
|
|
|
|
INIT_LIST_HEAD(&eps[0].ep.ep_list);
|
|
|
|
for (i = 0; i < pdata->num_ep; i++) {
|
|
struct usba_ep *ep = &eps[i];
|
|
|
|
ep->ep_regs = udc->regs + USBA_EPT_BASE(i);
|
|
ep->dma_regs = udc->regs + USBA_DMA_BASE(i);
|
|
ep->fifo = udc->fifo + USBA_FIFO_BASE(i);
|
|
ep->ep.ops = &usba_ep_ops;
|
|
ep->ep.name = pdata->ep[i].name;
|
|
ep->fifo_size = pdata->ep[i].fifo_size;
|
|
usb_ep_set_maxpacket_limit(&ep->ep, ep->fifo_size);
|
|
ep->udc = udc;
|
|
INIT_LIST_HEAD(&ep->queue);
|
|
ep->nr_banks = pdata->ep[i].nr_banks;
|
|
ep->index = pdata->ep[i].index;
|
|
ep->can_dma = pdata->ep[i].can_dma;
|
|
ep->can_isoc = pdata->ep[i].can_isoc;
|
|
|
|
if (i)
|
|
list_add_tail(&ep->ep.ep_list, &udc->gadget.ep_list);
|
|
}
|
|
|
|
return eps;
|
|
}
|
|
|
|
static int __init usba_udc_probe(struct platform_device *pdev)
|
|
{
|
|
struct resource *regs, *fifo;
|
|
struct clk *pclk, *hclk;
|
|
struct usba_udc *udc;
|
|
int irq, ret, i;
|
|
|
|
udc = devm_kzalloc(&pdev->dev, sizeof(*udc), GFP_KERNEL);
|
|
if (!udc)
|
|
return -ENOMEM;
|
|
|
|
udc->gadget = usba_gadget_template;
|
|
INIT_LIST_HEAD(&udc->gadget.ep_list);
|
|
|
|
regs = platform_get_resource(pdev, IORESOURCE_MEM, CTRL_IOMEM_ID);
|
|
fifo = platform_get_resource(pdev, IORESOURCE_MEM, FIFO_IOMEM_ID);
|
|
if (!regs || !fifo)
|
|
return -ENXIO;
|
|
|
|
irq = platform_get_irq(pdev, 0);
|
|
if (irq < 0)
|
|
return irq;
|
|
|
|
pclk = devm_clk_get(&pdev->dev, "pclk");
|
|
if (IS_ERR(pclk))
|
|
return PTR_ERR(pclk);
|
|
hclk = devm_clk_get(&pdev->dev, "hclk");
|
|
if (IS_ERR(hclk))
|
|
return PTR_ERR(hclk);
|
|
|
|
spin_lock_init(&udc->lock);
|
|
udc->pdev = pdev;
|
|
udc->pclk = pclk;
|
|
udc->hclk = hclk;
|
|
udc->vbus_pin = -ENODEV;
|
|
|
|
ret = -ENOMEM;
|
|
udc->regs = devm_ioremap(&pdev->dev, regs->start, resource_size(regs));
|
|
if (!udc->regs) {
|
|
dev_err(&pdev->dev, "Unable to map I/O memory, aborting.\n");
|
|
return ret;
|
|
}
|
|
dev_info(&pdev->dev, "MMIO registers at 0x%08lx mapped at %p\n",
|
|
(unsigned long)regs->start, udc->regs);
|
|
udc->fifo = devm_ioremap(&pdev->dev, fifo->start, resource_size(fifo));
|
|
if (!udc->fifo) {
|
|
dev_err(&pdev->dev, "Unable to map FIFO, aborting.\n");
|
|
return ret;
|
|
}
|
|
dev_info(&pdev->dev, "FIFO at 0x%08lx mapped at %p\n",
|
|
(unsigned long)fifo->start, udc->fifo);
|
|
|
|
platform_set_drvdata(pdev, udc);
|
|
|
|
/* Make sure we start from a clean slate */
|
|
ret = clk_prepare_enable(pclk);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "Unable to enable pclk, aborting.\n");
|
|
return ret;
|
|
}
|
|
toggle_bias(0);
|
|
usba_writel(udc, CTRL, USBA_DISABLE_MASK);
|
|
clk_disable_unprepare(pclk);
|
|
|
|
if (pdev->dev.of_node)
|
|
udc->usba_ep = atmel_udc_of_init(pdev, udc);
|
|
else
|
|
udc->usba_ep = usba_udc_pdata(pdev, udc);
|
|
|
|
if (IS_ERR(udc->usba_ep))
|
|
return PTR_ERR(udc->usba_ep);
|
|
|
|
ret = devm_request_irq(&pdev->dev, irq, usba_udc_irq, 0,
|
|
"atmel_usba_udc", udc);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "Cannot request irq %d (error %d)\n",
|
|
irq, ret);
|
|
return ret;
|
|
}
|
|
udc->irq = irq;
|
|
|
|
if (gpio_is_valid(udc->vbus_pin)) {
|
|
if (!devm_gpio_request(&pdev->dev, udc->vbus_pin, "atmel_usba_udc")) {
|
|
ret = devm_request_irq(&pdev->dev,
|
|
gpio_to_irq(udc->vbus_pin),
|
|
usba_vbus_irq, 0,
|
|
"atmel_usba_udc", udc);
|
|
if (ret) {
|
|
udc->vbus_pin = -ENODEV;
|
|
dev_warn(&udc->pdev->dev,
|
|
"failed to request vbus irq; "
|
|
"assuming always on\n");
|
|
} else {
|
|
disable_irq(gpio_to_irq(udc->vbus_pin));
|
|
}
|
|
} else {
|
|
/* gpio_request fail so use -EINVAL for gpio_is_valid */
|
|
udc->vbus_pin = -EINVAL;
|
|
}
|
|
}
|
|
|
|
ret = usb_add_gadget_udc(&pdev->dev, &udc->gadget);
|
|
if (ret)
|
|
return ret;
|
|
|
|
usba_init_debugfs(udc);
|
|
for (i = 1; i < udc->num_ep; i++)
|
|
usba_ep_init_debugfs(udc, &udc->usba_ep[i]);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __exit usba_udc_remove(struct platform_device *pdev)
|
|
{
|
|
struct usba_udc *udc;
|
|
int i;
|
|
|
|
udc = platform_get_drvdata(pdev);
|
|
|
|
usb_del_gadget_udc(&udc->gadget);
|
|
|
|
for (i = 1; i < udc->num_ep; i++)
|
|
usba_ep_cleanup_debugfs(&udc->usba_ep[i]);
|
|
usba_cleanup_debugfs(udc);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#if defined(CONFIG_OF)
|
|
static const struct of_device_id atmel_udc_dt_ids[] = {
|
|
{ .compatible = "atmel,at91sam9rl-udc" },
|
|
{ /* sentinel */ }
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(of, atmel_udc_dt_ids);
|
|
#endif
|
|
|
|
static struct platform_driver udc_driver = {
|
|
.remove = __exit_p(usba_udc_remove),
|
|
.driver = {
|
|
.name = "atmel_usba_udc",
|
|
.owner = THIS_MODULE,
|
|
.of_match_table = of_match_ptr(atmel_udc_dt_ids),
|
|
},
|
|
};
|
|
|
|
module_platform_driver_probe(udc_driver, usba_udc_probe);
|
|
|
|
MODULE_DESCRIPTION("Atmel USBA UDC driver");
|
|
MODULE_AUTHOR("Haavard Skinnemoen (Atmel)");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_ALIAS("platform:atmel_usba_udc");
|