// SPDX-License-Identifier: GPL-2.0-or-later
/*
Copyright ( C ) 2010 Willow Garage < http : //www.willowgarage.com>
Copyright ( C ) 2004 - 2010 Ivo van Doorn < IvDoorn @ gmail . com >
< http : //rt2x00.serialmonkey.com>
*/
/*
Module : rt2x00usb
Abstract : rt2x00 generic usb device routines .
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/usb.h>
#include <linux/bug.h>
#include "rt2x00.h"
#include "rt2x00usb.h"
static bool rt2x00usb_check_usb_error(struct rt2x00_dev *rt2x00dev, int status)
{
if (status == -ENODEV || status == -ENOENT)
return true ;
if (!test_bit(DEVICE_STATE_STARTED, &rt2x00dev->flags))
return false ;
if (status == -EPROTO || status == -ETIMEDOUT)
rt2x00dev->num_proto_errs++;
else
rt2x00dev->num_proto_errs = 0 ;
if (rt2x00dev->num_proto_errs > 3 )
return true ;
return false ;
}
/*
* Interfacing with the HW .
*/
int rt2x00usb_vendor_request(struct rt2x00_dev *rt2x00dev,
const u8 request, const u8 requesttype,
const u16 offset, const u16 value,
void *buffer, const u16 buffer_length,
const int timeout)
{
struct usb_device *usb_dev = to_usb_device_intf(rt2x00dev->dev);
int status;
unsigned int pipe =
(requesttype == USB_VENDOR_REQUEST_IN) ?
usb_rcvctrlpipe(usb_dev, 0 ) : usb_sndctrlpipe(usb_dev, 0 );
unsigned long expire = jiffies + msecs_to_jiffies(timeout);
if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags))
return -ENODEV;
do {
status = usb_control_msg(usb_dev, pipe, request, requesttype,
value, offset, buffer, buffer_length,
timeout / 2 );
if (status >= 0 )
return 0 ;
if (rt2x00usb_check_usb_error(rt2x00dev, status)) {
/* Device has disappeared. */
clear_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags);
break ;
}
} while (time_before(jiffies, expire));
rt2x00_err(rt2x00dev,
"Vendor Request 0x%02x failed for offset 0x%04x with error %d\n" ,
request, offset, status);
return status;
}
EXPORT_SYMBOL_GPL(rt2x00usb_vendor_request);
int rt2x00usb_vendor_req_buff_lock(struct rt2x00_dev *rt2x00dev,
const u8 request, const u8 requesttype,
const u16 offset, void *buffer,
const u16 buffer_length, const int timeout)
{
int status;
BUG_ON(!mutex_is_locked(&rt2x00dev->csr_mutex));
/*
* Check for Cache availability .
*/
if (unlikely(!rt2x00dev->csr.cache || buffer_length > CSR_CACHE_SIZE)) {
rt2x00_err(rt2x00dev, "CSR cache not available\n" );
return -ENOMEM;
}
if (requesttype == USB_VENDOR_REQUEST_OUT)
memcpy(rt2x00dev->csr.cache, buffer, buffer_length);
status = rt2x00usb_vendor_request(rt2x00dev, request, requesttype,
offset, 0 , rt2x00dev->csr.cache,
buffer_length, timeout);
if (!status && requesttype == USB_VENDOR_REQUEST_IN)
memcpy(buffer, rt2x00dev->csr.cache, buffer_length);
return status;
}
EXPORT_SYMBOL_GPL(rt2x00usb_vendor_req_buff_lock);
int rt2x00usb_vendor_request_buff(struct rt2x00_dev *rt2x00dev,
const u8 request, const u8 requesttype,
const u16 offset, void *buffer,
const u16 buffer_length)
{
int status = 0 ;
u8 *tb;
u16 off, len, bsize;
mutex_lock(&rt2x00dev->csr_mutex);
tb = (u8 *)buffer;
off = offset;
len = buffer_length;
while (len && !status) {
bsize = min_t(u16, CSR_CACHE_SIZE, len);
status = rt2x00usb_vendor_req_buff_lock(rt2x00dev, request,
requesttype, off, tb,
bsize, REGISTER_TIMEOUT);
tb += bsize;
len -= bsize;
off += bsize;
}
mutex_unlock(&rt2x00dev->csr_mutex);
return status;
}
EXPORT_SYMBOL_GPL(rt2x00usb_vendor_request_buff);
int rt2x00usb_regbusy_read(struct rt2x00_dev *rt2x00dev,
const unsigned int offset,
const struct rt2x00_field32 field,
u32 *reg)
{
unsigned int i;
if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags))
return -ENODEV;
for (i = 0 ; i < REGISTER_USB_BUSY_COUNT; i++) {
*reg = rt2x00usb_register_read_lock(rt2x00dev, offset);
if (!rt2x00_get_field32(*reg, field))
return 1 ;
udelay(REGISTER_BUSY_DELAY);
}
rt2x00_err(rt2x00dev, "Indirect register access failed: offset=0x%.08x, value=0x%.08x\n" ,
offset, *reg);
*reg = ~0 ;
return 0 ;
}
EXPORT_SYMBOL_GPL(rt2x00usb_regbusy_read);
struct rt2x00_async_read_data {
__le32 reg;
struct usb_ctrlrequest cr;
struct rt2x00_dev *rt2x00dev;
bool (*callback)(struct rt2x00_dev *, int , u32);
};
static void rt2x00usb_register_read_async_cb(struct urb *urb)
{
struct rt2x00_async_read_data *rd = urb->context;
if (rd->callback(rd->rt2x00dev, urb->status, le32_to_cpu(rd->reg))) {
usb_anchor_urb(urb, rd->rt2x00dev->anchor);
if (usb_submit_urb(urb, GFP_ATOMIC) < 0 ) {
usb_unanchor_urb(urb);
kfree(rd);
}
} else
kfree(rd);
}
void rt2x00usb_register_read_async(struct rt2x00_dev *rt2x00dev,
const unsigned int offset,
bool (*callback)(struct rt2x00_dev*, int , u32))
{
struct usb_device *usb_dev = to_usb_device_intf(rt2x00dev->dev);
struct urb *urb;
struct rt2x00_async_read_data *rd;
rd = kmalloc(sizeof (*rd), GFP_ATOMIC);
if (!rd)
return ;
urb = usb_alloc_urb(0 , GFP_ATOMIC);
if (!urb) {
kfree(rd);
return ;
}
rd->rt2x00dev = rt2x00dev;
rd->callback = callback;
rd->cr.bRequestType = USB_VENDOR_REQUEST_IN;
rd->cr.bRequest = USB_MULTI_READ;
rd->cr.wValue = 0 ;
rd->cr.wIndex = cpu_to_le16(offset);
rd->cr.wLength = cpu_to_le16(sizeof (u32));
usb_fill_control_urb(urb, usb_dev, usb_rcvctrlpipe(usb_dev, 0 ),
(u8 *)(&rd->cr), &rd->reg, sizeof (rd->reg),
rt2x00usb_register_read_async_cb, rd);
usb_anchor_urb(urb, rt2x00dev->anchor);
if (usb_submit_urb(urb, GFP_ATOMIC) < 0 ) {
usb_unanchor_urb(urb);
kfree(rd);
}
usb_free_urb(urb);
}
EXPORT_SYMBOL_GPL(rt2x00usb_register_read_async);
/*
* TX data handlers .
*/
static void rt2x00usb_work_txdone_entry(struct queue_entry *entry)
{
/*
* If the transfer to hardware succeeded , it does not mean the
* frame was send out correctly . It only means the frame
* was successfully pushed to the hardware , we have no
* way to determine the transmission status right now .
* ( Only indirectly by looking at the failed TX counters
* in the register ) .
*/
if (test_bit(ENTRY_DATA_IO_FAILED, &entry->flags))
rt2x00lib_txdone_noinfo(entry, TXDONE_FAILURE);
else
rt2x00lib_txdone_noinfo(entry, TXDONE_UNKNOWN);
}
static void rt2x00usb_work_txdone(struct work_struct *work)
{
struct rt2x00_dev *rt2x00dev =
container_of(work, struct rt2x00_dev, txdone_work);
struct data_queue *queue;
struct queue_entry *entry;
tx_queue_for_each(rt2x00dev, queue) {
while (!rt2x00queue_empty(queue)) {
entry = rt2x00queue_get_entry(queue, Q_INDEX_DONE);
if (test_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags) ||
!test_bit(ENTRY_DATA_STATUS_PENDING, &entry->flags))
break ;
rt2x00usb_work_txdone_entry(entry);
}
}
}
static void rt2x00usb_interrupt_txdone(struct urb *urb)
{
struct queue_entry *entry = (struct queue_entry *)urb->context;
struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
if (!test_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags))
return ;
/*
* Check if the frame was correctly uploaded
*/
if (urb->status)
set_bit(ENTRY_DATA_IO_FAILED, &entry->flags);
/*
* Report the frame as DMA done
*/
rt2x00lib_dmadone(entry);
if (rt2x00dev->ops->lib->tx_dma_done)
rt2x00dev->ops->lib->tx_dma_done(entry);
/*
* Schedule the delayed work for reading the TX status
* from the device .
*/
if (!rt2x00_has_cap_flag(rt2x00dev, REQUIRE_TXSTATUS_FIFO) ||
!kfifo_is_empty(&rt2x00dev->txstatus_fifo))
queue_work(rt2x00dev->workqueue, &rt2x00dev->txdone_work);
}
static bool rt2x00usb_kick_tx_entry(struct queue_entry *entry, void *data)
{
struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
struct usb_device *usb_dev = to_usb_device_intf(rt2x00dev->dev);
struct queue_entry_priv_usb *entry_priv = entry->priv_data;
u32 length;
int status;
if (!test_and_clear_bit(ENTRY_DATA_PENDING, &entry->flags) ||
test_bit(ENTRY_DATA_STATUS_PENDING, &entry->flags))
return false ;
/*
* USB devices require certain padding at the end of each frame
* and urb . Those paddings are not included in skbs . Pass entry
* to the driver to determine what the overall length should be .
*/
length = rt2x00dev->ops->lib->get_tx_data_len(entry);
status = skb_padto(entry->skb, length);
if (unlikely(status)) {
/* TODO: report something more appropriate than IO_FAILED. */
rt2x00_warn(rt2x00dev, "TX SKB padding error, out of memory\n" );
set_bit(ENTRY_DATA_IO_FAILED, &entry->flags);
rt2x00lib_dmadone(entry);
return false ;
}
usb_fill_bulk_urb(entry_priv->urb, usb_dev,
usb_sndbulkpipe(usb_dev, entry->queue->usb_endpoint),
entry->skb->data, length,
rt2x00usb_interrupt_txdone, entry);
status = usb_submit_urb(entry_priv->urb, GFP_ATOMIC);
if (status) {
if (rt2x00usb_check_usb_error(rt2x00dev, status))
clear_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags);
set_bit(ENTRY_DATA_IO_FAILED, &entry->flags);
rt2x00lib_dmadone(entry);
}
return false ;
}
/*
* RX data handlers .
*/
static void rt2x00usb_work_rxdone(struct work_struct *work)
{
struct rt2x00_dev *rt2x00dev =
container_of(work, struct rt2x00_dev, rxdone_work);
struct queue_entry *entry;
struct skb_frame_desc *skbdesc;
u8 rxd[32 ];
while (!rt2x00queue_empty(rt2x00dev->rx)) {
entry = rt2x00queue_get_entry(rt2x00dev->rx, Q_INDEX_DONE);
if (test_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags))
break ;
/*
* Fill in desc fields of the skb descriptor
*/
skbdesc = get_skb_frame_desc(entry->skb);
skbdesc->desc = rxd;
skbdesc->desc_len = entry->queue->desc_size;
/*
* Send the frame to rt2x00lib for further processing .
*/
rt2x00lib_rxdone(entry, GFP_KERNEL);
}
}
static void rt2x00usb_interrupt_rxdone(struct urb *urb)
{
struct queue_entry *entry = (struct queue_entry *)urb->context;
struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
if (!test_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags))
return ;
/*
* Check if the received data is simply too small
* to be actually valid , or if the urb is signaling
* a problem .
*/
if (urb->actual_length < entry->queue->desc_size || urb->status)
set_bit(ENTRY_DATA_IO_FAILED, &entry->flags);
/*
* Report the frame as DMA done
*/
rt2x00lib_dmadone(entry);
/*
* Schedule the delayed work for processing RX data
*/
queue_work(rt2x00dev->workqueue, &rt2x00dev->rxdone_work);
}
static bool rt2x00usb_kick_rx_entry(struct queue_entry *entry, void *data)
{
struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
struct usb_device *usb_dev = to_usb_device_intf(rt2x00dev->dev);
struct queue_entry_priv_usb *entry_priv = entry->priv_data;
int status;
if (test_and_set_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags))
return false ;
rt2x00lib_dmastart(entry);
usb_fill_bulk_urb(entry_priv->urb, usb_dev,
usb_rcvbulkpipe(usb_dev, entry->queue->usb_endpoint),
entry->skb->data, entry->skb->len,
rt2x00usb_interrupt_rxdone, entry);
status = usb_submit_urb(entry_priv->urb, GFP_ATOMIC);
if (status) {
if (rt2x00usb_check_usb_error(rt2x00dev, status))
clear_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags);
set_bit(ENTRY_DATA_IO_FAILED, &entry->flags);
rt2x00lib_dmadone(entry);
}
return false ;
}
void rt2x00usb_kick_queue(struct data_queue *queue)
{
switch (queue->qid) {
case QID_AC_VO:
case QID_AC_VI:
case QID_AC_BE:
case QID_AC_BK:
if (!rt2x00queue_empty(queue))
rt2x00queue_for_each_entry(queue,
Q_INDEX_DONE,
Q_INDEX,
NULL,
rt2x00usb_kick_tx_entry);
break ;
case QID_RX:
if (!rt2x00queue_full(queue))
rt2x00queue_for_each_entry(queue,
Q_INDEX,
Q_INDEX_DONE,
NULL,
rt2x00usb_kick_rx_entry);
break ;
default :
break ;
}
}
EXPORT_SYMBOL_GPL(rt2x00usb_kick_queue);
static bool rt2x00usb_flush_entry(struct queue_entry *entry, void *data)
{
struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
struct queue_entry_priv_usb *entry_priv = entry->priv_data;
struct queue_entry_priv_usb_bcn *bcn_priv = entry->priv_data;
if (!test_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags))
return false ;
usb_kill_urb(entry_priv->urb);
/*
* Kill guardian urb ( if required by driver ) .
*/
if ((entry->queue->qid == QID_BEACON) &&
(rt2x00_has_cap_flag(rt2x00dev, REQUIRE_BEACON_GUARD)))
usb_kill_urb(bcn_priv->guardian_urb);
return false ;
}
void rt2x00usb_flush_queue(struct data_queue *queue, bool drop)
{
struct work_struct *completion;
unsigned int i;
if (drop)
rt2x00queue_for_each_entry(queue, Q_INDEX_DONE, Q_INDEX, NULL,
rt2x00usb_flush_entry);
/*
* Obtain the queue completion handler
*/
switch (queue->qid) {
case QID_AC_VO:
case QID_AC_VI:
case QID_AC_BE:
case QID_AC_BK:
completion = &queue->rt2x00dev->txdone_work;
break ;
case QID_RX:
completion = &queue->rt2x00dev->rxdone_work;
break ;
default :
return ;
}
for (i = 0 ; i < 10 ; i++) {
/*
* Check if the driver is already done , otherwise we
* have to sleep a little while to give the driver / hw
* the oppurtunity to complete interrupt process itself .
*/
if (rt2x00queue_empty(queue))
break ;
/*
* Schedule the completion handler manually , when this
* worker function runs , it should cleanup the queue .
*/
queue_work(queue->rt2x00dev->workqueue, completion);
/*
* Wait for a little while to give the driver
* the oppurtunity to recover itself .
*/
msleep(50 );
}
}
EXPORT_SYMBOL_GPL(rt2x00usb_flush_queue);
static void rt2x00usb_watchdog_tx_dma(struct data_queue *queue)
{
rt2x00_warn(queue->rt2x00dev, "TX queue %d DMA timed out, invoke forced reset\n" ,
queue->qid);
rt2x00queue_stop_queue(queue);
rt2x00queue_flush_queue(queue, true );
rt2x00queue_start_queue(queue);
}
static int rt2x00usb_dma_timeout(struct data_queue *queue)
{
struct queue_entry *entry;
entry = rt2x00queue_get_entry(queue, Q_INDEX_DMA_DONE);
return rt2x00queue_dma_timeout(entry);
}
void rt2x00usb_watchdog(struct rt2x00_dev *rt2x00dev)
{
struct data_queue *queue;
tx_queue_for_each(rt2x00dev, queue) {
if (!rt2x00queue_empty(queue)) {
if (rt2x00usb_dma_timeout(queue))
rt2x00usb_watchdog_tx_dma(queue);
}
}
}
EXPORT_SYMBOL_GPL(rt2x00usb_watchdog);
/*
* Radio handlers
*/
void rt2x00usb_disable_radio(struct rt2x00_dev *rt2x00dev)
{
rt2x00usb_vendor_request_sw(rt2x00dev, USB_RX_CONTROL, 0 , 0 ,
REGISTER_TIMEOUT);
}
EXPORT_SYMBOL_GPL(rt2x00usb_disable_radio);
/*
* Device initialization handlers .
*/
void rt2x00usb_clear_entry(struct queue_entry *entry)
{
entry->flags = 0 ;
if (entry->queue->qid == QID_RX)
rt2x00usb_kick_rx_entry(entry, NULL);
}
EXPORT_SYMBOL_GPL(rt2x00usb_clear_entry);
static void rt2x00usb_assign_endpoint(struct data_queue *queue,
struct usb_endpoint_descriptor *ep_desc)
{
struct usb_device *usb_dev = to_usb_device_intf(queue->rt2x00dev->dev);
int pipe;
queue->usb_endpoint = usb_endpoint_num(ep_desc);
if (queue->qid == QID_RX) {
pipe = usb_rcvbulkpipe(usb_dev, queue->usb_endpoint);
queue->usb_maxpacket = usb_maxpacket(usb_dev, pipe);
} else {
pipe = usb_sndbulkpipe(usb_dev, queue->usb_endpoint);
queue->usb_maxpacket = usb_maxpacket(usb_dev, pipe);
}
if (!queue->usb_maxpacket)
queue->usb_maxpacket = 1 ;
}
static int rt2x00usb_find_endpoints(struct rt2x00_dev *rt2x00dev)
{
struct usb_interface *intf = to_usb_interface(rt2x00dev->dev);
struct usb_host_interface *intf_desc = intf->cur_altsetting;
struct usb_endpoint_descriptor *ep_desc;
struct data_queue *queue = rt2x00dev->tx;
struct usb_endpoint_descriptor *tx_ep_desc = NULL;
unsigned int i;
/*
* Walk through all available endpoints to search for " bulk in "
* and " bulk out " endpoints . When we find such endpoints collect
* the information we need from the descriptor and assign it
* to the queue .
*/
for (i = 0 ; i < intf_desc->desc.bNumEndpoints; i++) {
ep_desc = &intf_desc->endpoint[i].desc;
if (usb_endpoint_is_bulk_in(ep_desc)) {
rt2x00usb_assign_endpoint(rt2x00dev->rx, ep_desc);
} else if (usb_endpoint_is_bulk_out(ep_desc) &&
(queue != queue_end(rt2x00dev))) {
rt2x00usb_assign_endpoint(queue, ep_desc);
queue = queue_next(queue);
tx_ep_desc = ep_desc;
}
}
/*
* At least 1 endpoint for RX and 1 endpoint for TX must be available .
*/
if (!rt2x00dev->rx->usb_endpoint || !rt2x00dev->tx->usb_endpoint) {
rt2x00_err(rt2x00dev, "Bulk-in/Bulk-out endpoints not found\n" );
return -EPIPE;
}
/*
* It might be possible not all queues have a dedicated endpoint .
* Loop through all TX queues and copy the endpoint information
* which we have gathered from already assigned endpoints .
*/
txall_queue_for_each(rt2x00dev, queue) {
if (!queue->usb_endpoint)
rt2x00usb_assign_endpoint(queue, tx_ep_desc);
}
return 0 ;
}
static int rt2x00usb_alloc_entries(struct data_queue *queue)
{
struct rt2x00_dev *rt2x00dev = queue->rt2x00dev;
struct queue_entry_priv_usb *entry_priv;
struct queue_entry_priv_usb_bcn *bcn_priv;
unsigned int i;
for (i = 0 ; i < queue->limit; i++) {
entry_priv = queue->entries[i].priv_data;
entry_priv->urb = usb_alloc_urb(0 , GFP_KERNEL);
if (!entry_priv->urb)
return -ENOMEM;
}
/*
* If this is not the beacon queue or
* no guardian byte was required for the beacon ,
* then we are done .
*/
if (queue->qid != QID_BEACON ||
!rt2x00_has_cap_flag(rt2x00dev, REQUIRE_BEACON_GUARD))
return 0 ;
for (i = 0 ; i < queue->limit; i++) {
bcn_priv = queue->entries[i].priv_data;
bcn_priv->guardian_urb = usb_alloc_urb(0 , GFP_KERNEL);
if (!bcn_priv->guardian_urb)
return -ENOMEM;
}
return 0 ;
}
static void rt2x00usb_free_entries(struct data_queue *queue)
{
struct rt2x00_dev *rt2x00dev = queue->rt2x00dev;
struct queue_entry_priv_usb *entry_priv;
struct queue_entry_priv_usb_bcn *bcn_priv;
unsigned int i;
if (!queue->entries)
return ;
for (i = 0 ; i < queue->limit; i++) {
entry_priv = queue->entries[i].priv_data;
usb_kill_urb(entry_priv->urb);
usb_free_urb(entry_priv->urb);
}
/*
* If this is not the beacon queue or
* no guardian byte was required for the beacon ,
* then we are done .
*/
if (queue->qid != QID_BEACON ||
!rt2x00_has_cap_flag(rt2x00dev, REQUIRE_BEACON_GUARD))
return ;
for (i = 0 ; i < queue->limit; i++) {
bcn_priv = queue->entries[i].priv_data;
usb_kill_urb(bcn_priv->guardian_urb);
usb_free_urb(bcn_priv->guardian_urb);
}
}
int rt2x00usb_initialize(struct rt2x00_dev *rt2x00dev)
{
struct data_queue *queue;
int status;
/*
* Find endpoints for each queue
*/
status = rt2x00usb_find_endpoints(rt2x00dev);
if (status)
goto exit ;
/*
* Allocate DMA
*/
queue_for_each(rt2x00dev, queue) {
status = rt2x00usb_alloc_entries(queue);
if (status)
goto exit ;
}
return 0 ;
exit :
rt2x00usb_uninitialize(rt2x00dev);
return status;
}
EXPORT_SYMBOL_GPL(rt2x00usb_initialize);
void rt2x00usb_uninitialize(struct rt2x00_dev *rt2x00dev)
{
struct data_queue *queue;
usb_kill_anchored_urbs(rt2x00dev->anchor);
hrtimer_cancel(&rt2x00dev->txstatus_timer);
cancel_work_sync(&rt2x00dev->rxdone_work);
cancel_work_sync(&rt2x00dev->txdone_work);
queue_for_each(rt2x00dev, queue)
rt2x00usb_free_entries(queue);
}
EXPORT_SYMBOL_GPL(rt2x00usb_uninitialize);
/*
* USB driver handlers .
*/
static void rt2x00usb_free_reg(struct rt2x00_dev *rt2x00dev)
{
kfree(rt2x00dev->rf);
rt2x00dev->rf = NULL;
kfree(rt2x00dev->eeprom);
rt2x00dev->eeprom = NULL;
kfree(rt2x00dev->csr.cache);
rt2x00dev->csr.cache = NULL;
}
static int rt2x00usb_alloc_reg(struct rt2x00_dev *rt2x00dev)
{
rt2x00dev->csr.cache = kzalloc(CSR_CACHE_SIZE, GFP_KERNEL);
if (!rt2x00dev->csr.cache)
goto exit ;
rt2x00dev->eeprom = kzalloc(rt2x00dev->ops->eeprom_size, GFP_KERNEL);
if (!rt2x00dev->eeprom)
goto exit ;
rt2x00dev->rf = kzalloc(rt2x00dev->ops->rf_size, GFP_KERNEL);
if (!rt2x00dev->rf)
goto exit ;
return 0 ;
exit :
rt2x00_probe_err("Failed to allocate registers\n" );
rt2x00usb_free_reg(rt2x00dev);
return -ENOMEM;
}
int rt2x00usb_probe(struct usb_interface *usb_intf,
const struct rt2x00_ops *ops)
{
struct usb_device *usb_dev = interface_to_usbdev(usb_intf);
struct ieee80211_hw *hw;
struct rt2x00_dev *rt2x00dev;
int retval;
usb_dev = usb_get_dev(usb_dev);
usb_reset_device(usb_dev);
hw = ieee80211_alloc_hw(sizeof (struct rt2x00_dev), ops->hw);
if (!hw) {
rt2x00_probe_err("Failed to allocate hardware\n" );
retval = -ENOMEM;
goto exit_put_device;
}
usb_set_intfdata(usb_intf, hw);
rt2x00dev = hw->priv;
rt2x00dev->dev = &usb_intf->dev;
rt2x00dev->ops = ops;
rt2x00dev->hw = hw;
rt2x00_set_chip_intf(rt2x00dev, RT2X00_CHIP_INTF_USB);
INIT_WORK(&rt2x00dev->rxdone_work, rt2x00usb_work_rxdone);
INIT_WORK(&rt2x00dev->txdone_work, rt2x00usb_work_txdone);
retval = rt2x00usb_alloc_reg(rt2x00dev);
if (retval)
goto exit_free_device;
rt2x00dev->anchor = devm_kmalloc(&usb_dev->dev,
sizeof (struct usb_anchor),
GFP_KERNEL);
if (!rt2x00dev->anchor) {
retval = -ENOMEM;
goto exit_free_reg;
}
init_usb_anchor(rt2x00dev->anchor);
retval = rt2x00lib_probe_dev(rt2x00dev);
if (retval)
goto exit_free_anchor;
return 0 ;
exit_free_anchor:
usb_kill_anchored_urbs(rt2x00dev->anchor);
exit_free_reg:
rt2x00usb_free_reg(rt2x00dev);
exit_free_device:
ieee80211_free_hw(hw);
exit_put_device:
usb_put_dev(usb_dev);
usb_set_intfdata(usb_intf, NULL);
return retval;
}
EXPORT_SYMBOL_GPL(rt2x00usb_probe);
void rt2x00usb_disconnect(struct usb_interface *usb_intf)
{
struct ieee80211_hw *hw = usb_get_intfdata(usb_intf);
struct rt2x00_dev *rt2x00dev = hw->priv;
/*
* Free all allocated data .
*/
rt2x00lib_remove_dev(rt2x00dev);
rt2x00usb_free_reg(rt2x00dev);
ieee80211_free_hw(hw);
/*
* Free the USB device data .
*/
usb_set_intfdata(usb_intf, NULL);
usb_put_dev(interface_to_usbdev(usb_intf));
}
EXPORT_SYMBOL_GPL(rt2x00usb_disconnect);
#ifdef CONFIG_PM
int rt2x00usb_suspend(struct usb_interface *usb_intf, pm_message_t state)
{
struct ieee80211_hw *hw = usb_get_intfdata(usb_intf);
struct rt2x00_dev *rt2x00dev = hw->priv;
return rt2x00lib_suspend(rt2x00dev);
}
EXPORT_SYMBOL_GPL(rt2x00usb_suspend);
int rt2x00usb_resume(struct usb_interface *usb_intf)
{
struct ieee80211_hw *hw = usb_get_intfdata(usb_intf);
struct rt2x00_dev *rt2x00dev = hw->priv;
return rt2x00lib_resume(rt2x00dev);
}
EXPORT_SYMBOL_GPL(rt2x00usb_resume);
#endif /* CONFIG_PM */
/*
* rt2x00usb module information .
*/
MODULE_AUTHOR(DRV_PROJECT);
MODULE_VERSION(DRV_VERSION);
MODULE_DESCRIPTION("rt2x00 usb library" );
MODULE_LICENSE("GPL" );
Messung V0.5 in Prozent C=97 H=94 G=95
¤ Dauer der Verarbeitung: 0.9 Sekunden
¤
*© Formatika GbR, Deutschland