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linux-zen-desktop/drivers/net/wireless/ath/ath9k/hif_usb.c

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Initial commit
2023-08-30 17:31:07 +02:00
/*
* Copyright (c) 2010-2011 Atheros Communications Inc.
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <asm/unaligned.h>
#include "htc.h"
MODULE_FIRMWARE(HTC_7010_MODULE_FW);
MODULE_FIRMWARE(HTC_9271_MODULE_FW);
static const struct usb_device_id ath9k_hif_usb_ids[] = {
{ USB_DEVICE(0x0cf3, 0x9271) }, /* Atheros */
{ USB_DEVICE(0x0cf3, 0x1006) }, /* Atheros */
{ USB_DEVICE(0x0846, 0x9030) }, /* Netgear N150 */
{ USB_DEVICE(0x07b8, 0x9271) }, /* Altai WA1011N-GU */
{ USB_DEVICE(0x07D1, 0x3A10) }, /* Dlink Wireless 150 */
{ USB_DEVICE(0x13D3, 0x3327) }, /* Azurewave */
{ USB_DEVICE(0x13D3, 0x3328) }, /* Azurewave */
{ USB_DEVICE(0x13D3, 0x3346) }, /* IMC Networks */
{ USB_DEVICE(0x13D3, 0x3348) }, /* Azurewave */
{ USB_DEVICE(0x13D3, 0x3349) }, /* Azurewave */
{ USB_DEVICE(0x13D3, 0x3350) }, /* Azurewave */
{ USB_DEVICE(0x04CA, 0x4605) }, /* Liteon */
{ USB_DEVICE(0x040D, 0x3801) }, /* VIA */
{ USB_DEVICE(0x0cf3, 0xb003) }, /* Ubiquiti WifiStation Ext */
{ USB_DEVICE(0x0cf3, 0xb002) }, /* Ubiquiti WifiStation */
{ USB_DEVICE(0x057c, 0x8403) }, /* AVM FRITZ!WLAN 11N v2 USB */
{ USB_DEVICE(0x0471, 0x209e) }, /* Philips (or NXP) PTA01 */
{ USB_DEVICE(0x1eda, 0x2315) }, /* AirTies */
{ USB_DEVICE(0x0cf3, 0x7015),
.driver_info = AR9287_USB }, /* Atheros */
{ USB_DEVICE(0x0cf3, 0x7010),
.driver_info = AR9280_USB }, /* Atheros */
{ USB_DEVICE(0x0846, 0x9018),
.driver_info = AR9280_USB }, /* Netgear WNDA3200 */
{ USB_DEVICE(0x083A, 0xA704),
.driver_info = AR9280_USB }, /* SMC Networks */
{ USB_DEVICE(0x0411, 0x017f),
.driver_info = AR9280_USB }, /* Sony UWA-BR100 */
{ USB_DEVICE(0x0411, 0x0197),
.driver_info = AR9280_USB }, /* Buffalo WLI-UV-AG300P */
{ USB_DEVICE(0x04da, 0x3904),
.driver_info = AR9280_USB },
{ USB_DEVICE(0x0930, 0x0a08),
.driver_info = AR9280_USB }, /* Toshiba WLM-20U2 and GN-1080 */
{ USB_DEVICE(0x0cf3, 0x20ff),
.driver_info = STORAGE_DEVICE },
{ },
};
MODULE_DEVICE_TABLE(usb, ath9k_hif_usb_ids);
static int __hif_usb_tx(struct hif_device_usb *hif_dev);
static void hif_usb_regout_cb(struct urb *urb)
{
struct cmd_buf *cmd = (struct cmd_buf *)urb->context;
switch (urb->status) {
case 0:
break;
case -ENOENT:
case -ECONNRESET:
case -ENODEV:
case -ESHUTDOWN:
goto free;
default:
break;
}
if (cmd) {
ath9k_htc_txcompletion_cb(cmd->hif_dev->htc_handle,
cmd->skb, true);
kfree(cmd);
}
return;
free:
kfree_skb(cmd->skb);
kfree(cmd);
}
static int hif_usb_send_regout(struct hif_device_usb *hif_dev,
struct sk_buff *skb)
{
struct urb *urb;
struct cmd_buf *cmd;
int ret = 0;
urb = usb_alloc_urb(0, GFP_KERNEL);
if (urb == NULL)
return -ENOMEM;
cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
if (cmd == NULL) {
usb_free_urb(urb);
return -ENOMEM;
}
cmd->skb = skb;
cmd->hif_dev = hif_dev;
usb_fill_int_urb(urb, hif_dev->udev,
usb_sndintpipe(hif_dev->udev, USB_REG_OUT_PIPE),
skb->data, skb->len,
hif_usb_regout_cb, cmd, 1);
usb_anchor_urb(urb, &hif_dev->regout_submitted);
ret = usb_submit_urb(urb, GFP_KERNEL);
if (ret) {
usb_unanchor_urb(urb);
kfree(cmd);
}
usb_free_urb(urb);
return ret;
}
static void hif_usb_mgmt_cb(struct urb *urb)
{
struct cmd_buf *cmd = (struct cmd_buf *)urb->context;
struct hif_device_usb *hif_dev;
unsigned long flags;
bool txok = true;
if (!cmd || !cmd->skb || !cmd->hif_dev)
return;
hif_dev = cmd->hif_dev;
switch (urb->status) {
case 0:
break;
case -ENOENT:
case -ECONNRESET:
case -ENODEV:
case -ESHUTDOWN:
txok = false;
/*
* If the URBs are being flushed, no need to complete
* this packet.
*/
spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
if (hif_dev->tx.flags & HIF_USB_TX_FLUSH) {
spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
dev_kfree_skb_any(cmd->skb);
kfree(cmd);
return;
}
spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
break;
default:
txok = false;
break;
}
skb_pull(cmd->skb, 4);
ath9k_htc_txcompletion_cb(cmd->hif_dev->htc_handle,
cmd->skb, txok);
kfree(cmd);
}
static int hif_usb_send_mgmt(struct hif_device_usb *hif_dev,
struct sk_buff *skb)
{
struct urb *urb;
struct cmd_buf *cmd;
int ret = 0;
__le16 *hdr;
urb = usb_alloc_urb(0, GFP_ATOMIC);
if (urb == NULL)
return -ENOMEM;
cmd = kzalloc(sizeof(*cmd), GFP_ATOMIC);
if (cmd == NULL) {
usb_free_urb(urb);
return -ENOMEM;
}
cmd->skb = skb;
cmd->hif_dev = hif_dev;
hdr = skb_push(skb, 4);
*hdr++ = cpu_to_le16(skb->len - 4);
*hdr++ = cpu_to_le16(ATH_USB_TX_STREAM_MODE_TAG);
usb_fill_bulk_urb(urb, hif_dev->udev,
usb_sndbulkpipe(hif_dev->udev, USB_WLAN_TX_PIPE),
skb->data, skb->len,
hif_usb_mgmt_cb, cmd);
usb_anchor_urb(urb, &hif_dev->mgmt_submitted);
ret = usb_submit_urb(urb, GFP_ATOMIC);
if (ret) {
usb_unanchor_urb(urb);
kfree(cmd);
}
usb_free_urb(urb);
return ret;
}
static inline void ath9k_skb_queue_purge(struct hif_device_usb *hif_dev,
struct sk_buff_head *list)
{
struct sk_buff *skb;
while ((skb = __skb_dequeue(list)) != NULL) {
dev_kfree_skb_any(skb);
}
}
static inline void ath9k_skb_queue_complete(struct hif_device_usb *hif_dev,
struct sk_buff_head *queue,
bool txok)
{
struct sk_buff *skb;
while ((skb = __skb_dequeue(queue)) != NULL) {
#ifdef CONFIG_ATH9K_HTC_DEBUGFS
int ln = skb->len;
#endif
ath9k_htc_txcompletion_cb(hif_dev->htc_handle,
skb, txok);
if (txok) {
TX_STAT_INC(hif_dev, skb_success);
TX_STAT_ADD(hif_dev, skb_success_bytes, ln);
}
else
TX_STAT_INC(hif_dev, skb_failed);
}
}
static void hif_usb_tx_cb(struct urb *urb)
{
struct tx_buf *tx_buf = (struct tx_buf *) urb->context;
struct hif_device_usb *hif_dev;
bool txok = true;
if (!tx_buf || !tx_buf->hif_dev)
return;
hif_dev = tx_buf->hif_dev;
switch (urb->status) {
case 0:
break;
case -ENOENT:
case -ECONNRESET:
case -ENODEV:
case -ESHUTDOWN:
txok = false;
/*
* If the URBs are being flushed, no need to add this
* URB to the free list.
*/
spin_lock(&hif_dev->tx.tx_lock);
if (hif_dev->tx.flags & HIF_USB_TX_FLUSH) {
spin_unlock(&hif_dev->tx.tx_lock);
ath9k_skb_queue_purge(hif_dev, &tx_buf->skb_queue);
return;
}
spin_unlock(&hif_dev->tx.tx_lock);
break;
default:
txok = false;
break;
}
ath9k_skb_queue_complete(hif_dev, &tx_buf->skb_queue, txok);
/* Re-initialize the SKB queue */
tx_buf->len = tx_buf->offset = 0;
__skb_queue_head_init(&tx_buf->skb_queue);
/* Add this TX buffer to the free list */
spin_lock(&hif_dev->tx.tx_lock);
list_move_tail(&tx_buf->list, &hif_dev->tx.tx_buf);
hif_dev->tx.tx_buf_cnt++;
if (!(hif_dev->tx.flags & HIF_USB_TX_STOP))
__hif_usb_tx(hif_dev); /* Check for pending SKBs */
TX_STAT_INC(hif_dev, buf_completed);
spin_unlock(&hif_dev->tx.tx_lock);
}
/* TX lock has to be taken */
static int __hif_usb_tx(struct hif_device_usb *hif_dev)
{
struct tx_buf *tx_buf = NULL;
struct sk_buff *nskb = NULL;
int ret = 0, i;
u16 tx_skb_cnt = 0;
u8 *buf;
__le16 *hdr;
if (hif_dev->tx.tx_skb_cnt == 0)
return 0;
/* Check if a free TX buffer is available */
if (list_empty(&hif_dev->tx.tx_buf))
return 0;
tx_buf = list_first_entry(&hif_dev->tx.tx_buf, struct tx_buf, list);
list_move_tail(&tx_buf->list, &hif_dev->tx.tx_pending);
hif_dev->tx.tx_buf_cnt--;
tx_skb_cnt = min_t(u16, hif_dev->tx.tx_skb_cnt, MAX_TX_AGGR_NUM);
for (i = 0; i < tx_skb_cnt; i++) {
nskb = __skb_dequeue(&hif_dev->tx.tx_skb_queue);
/* Should never be NULL */
BUG_ON(!nskb);
hif_dev->tx.tx_skb_cnt--;
buf = tx_buf->buf;
buf += tx_buf->offset;
hdr = (__le16 *)buf;
*hdr++ = cpu_to_le16(nskb->len);
*hdr++ = cpu_to_le16(ATH_USB_TX_STREAM_MODE_TAG);
buf += 4;
memcpy(buf, nskb->data, nskb->len);
tx_buf->len = nskb->len + 4;
if (i < (tx_skb_cnt - 1))
tx_buf->offset += (((tx_buf->len - 1) / 4) + 1) * 4;
if (i == (tx_skb_cnt - 1))
tx_buf->len += tx_buf->offset;
__skb_queue_tail(&tx_buf->skb_queue, nskb);
TX_STAT_INC(hif_dev, skb_queued);
}
usb_fill_bulk_urb(tx_buf->urb, hif_dev->udev,
usb_sndbulkpipe(hif_dev->udev, USB_WLAN_TX_PIPE),
tx_buf->buf, tx_buf->len,
hif_usb_tx_cb, tx_buf);
ret = usb_submit_urb(tx_buf->urb, GFP_ATOMIC);
if (ret) {
tx_buf->len = tx_buf->offset = 0;
ath9k_skb_queue_complete(hif_dev, &tx_buf->skb_queue, false);
__skb_queue_head_init(&tx_buf->skb_queue);
list_move_tail(&tx_buf->list, &hif_dev->tx.tx_buf);
hif_dev->tx.tx_buf_cnt++;
} else {
TX_STAT_INC(hif_dev, buf_queued);
}
return ret;
}
static int hif_usb_send_tx(struct hif_device_usb *hif_dev, struct sk_buff *skb)
{
struct ath9k_htc_tx_ctl *tx_ctl;
unsigned long flags;
int ret = 0;
spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
if (hif_dev->tx.flags & HIF_USB_TX_STOP) {
spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
return -ENODEV;
}
/* Check if the max queue count has been reached */
if (hif_dev->tx.tx_skb_cnt > MAX_TX_BUF_NUM) {
spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
return -ENOMEM;
}
spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
tx_ctl = HTC_SKB_CB(skb);
/* Mgmt/Beacon frames don't use the TX buffer pool */
if ((tx_ctl->type == ATH9K_HTC_MGMT) ||
(tx_ctl->type == ATH9K_HTC_BEACON)) {
ret = hif_usb_send_mgmt(hif_dev, skb);
}
spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
if ((tx_ctl->type == ATH9K_HTC_NORMAL) ||
(tx_ctl->type == ATH9K_HTC_AMPDU)) {
__skb_queue_tail(&hif_dev->tx.tx_skb_queue, skb);
hif_dev->tx.tx_skb_cnt++;
}
/* Check if AMPDUs have to be sent immediately */
if ((hif_dev->tx.tx_buf_cnt == MAX_TX_URB_NUM) &&
(hif_dev->tx.tx_skb_cnt < 2)) {
__hif_usb_tx(hif_dev);
}
spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
return ret;
}
static void hif_usb_start(void *hif_handle)
{
struct hif_device_usb *hif_dev = hif_handle;
unsigned long flags;
hif_dev->flags |= HIF_USB_START;
spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
hif_dev->tx.flags &= ~HIF_USB_TX_STOP;
spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
}
static void hif_usb_stop(void *hif_handle)
{
struct hif_device_usb *hif_dev = hif_handle;
struct tx_buf *tx_buf = NULL, *tx_buf_tmp = NULL;
unsigned long flags;
spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
ath9k_skb_queue_complete(hif_dev, &hif_dev->tx.tx_skb_queue, false);
hif_dev->tx.tx_skb_cnt = 0;
hif_dev->tx.flags |= HIF_USB_TX_STOP;
spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
/* The pending URBs have to be canceled. */
spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
list_for_each_entry_safe(tx_buf, tx_buf_tmp,
&hif_dev->tx.tx_pending, list) {
usb_get_urb(tx_buf->urb);
spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
usb_kill_urb(tx_buf->urb);
list_del(&tx_buf->list);
usb_free_urb(tx_buf->urb);
kfree(tx_buf->buf);
kfree(tx_buf);
spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
}
spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
usb_kill_anchored_urbs(&hif_dev->mgmt_submitted);
}
static int hif_usb_send(void *hif_handle, u8 pipe_id, struct sk_buff *skb)
{
struct hif_device_usb *hif_dev = hif_handle;
int ret = 0;
switch (pipe_id) {
case USB_WLAN_TX_PIPE:
ret = hif_usb_send_tx(hif_dev, skb);
break;
case USB_REG_OUT_PIPE:
ret = hif_usb_send_regout(hif_dev, skb);
break;
default:
dev_err(&hif_dev->udev->dev,
"ath9k_htc: Invalid TX pipe: %d\n", pipe_id);
ret = -EINVAL;
break;
}
return ret;
}
static inline bool check_index(struct sk_buff *skb, u8 idx)
{
struct ath9k_htc_tx_ctl *tx_ctl;
tx_ctl = HTC_SKB_CB(skb);
if ((tx_ctl->type == ATH9K_HTC_AMPDU) &&
(tx_ctl->sta_idx == idx))
return true;
return false;
}
static void hif_usb_sta_drain(void *hif_handle, u8 idx)
{
struct hif_device_usb *hif_dev = hif_handle;
struct sk_buff *skb, *tmp;
unsigned long flags;
spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
skb_queue_walk_safe(&hif_dev->tx.tx_skb_queue, skb, tmp) {
if (check_index(skb, idx)) {
__skb_unlink(skb, &hif_dev->tx.tx_skb_queue);
ath9k_htc_txcompletion_cb(hif_dev->htc_handle,
skb, false);
hif_dev->tx.tx_skb_cnt--;
TX_STAT_INC(hif_dev, skb_failed);
}
}
spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
}
static struct ath9k_htc_hif hif_usb = {
.transport = ATH9K_HIF_USB,
.name = "ath9k_hif_usb",
.control_ul_pipe = USB_REG_OUT_PIPE,
.control_dl_pipe = USB_REG_IN_PIPE,
.start = hif_usb_start,
.stop = hif_usb_stop,
.sta_drain = hif_usb_sta_drain,
.send = hif_usb_send,
};
/* Need to free remain_skb allocated in ath9k_hif_usb_rx_stream
* in case ath9k_hif_usb_rx_stream wasn't called next time to
* process the buffer and subsequently free it.
*/
static void ath9k_hif_usb_free_rx_remain_skb(struct hif_device_usb *hif_dev)
{
unsigned long flags;
spin_lock_irqsave(&hif_dev->rx_lock, flags);
if (hif_dev->remain_skb) {
dev_kfree_skb_any(hif_dev->remain_skb);
hif_dev->remain_skb = NULL;
hif_dev->rx_remain_len = 0;
RX_STAT_INC(hif_dev, skb_dropped);
}
spin_unlock_irqrestore(&hif_dev->rx_lock, flags);
}
static void ath9k_hif_usb_rx_stream(struct hif_device_usb *hif_dev,
struct sk_buff *skb)
{
struct sk_buff *nskb, *skb_pool[MAX_PKT_NUM_IN_TRANSFER];
int index = 0, i, len = skb->len;
int rx_remain_len, rx_pkt_len;
u16 pool_index = 0;
u8 *ptr;
spin_lock(&hif_dev->rx_lock);
rx_remain_len = hif_dev->rx_remain_len;
rx_pkt_len = hif_dev->rx_transfer_len;
if (rx_remain_len != 0) {
struct sk_buff *remain_skb = hif_dev->remain_skb;
if (remain_skb) {
ptr = (u8 *) remain_skb->data;
index = rx_remain_len;
rx_remain_len -= hif_dev->rx_pad_len;
ptr += rx_pkt_len;
memcpy(ptr, skb->data, rx_remain_len);
rx_pkt_len += rx_remain_len;
skb_put(remain_skb, rx_pkt_len);
skb_pool[pool_index++] = remain_skb;
hif_dev->remain_skb = NULL;
hif_dev->rx_remain_len = 0;
} else {
index = rx_remain_len;
}
}
spin_unlock(&hif_dev->rx_lock);
while (index < len) {
u16 pkt_len;
u16 pkt_tag;
u16 pad_len;
int chk_idx;
ptr = (u8 *) skb->data;
pkt_len = get_unaligned_le16(ptr + index);
pkt_tag = get_unaligned_le16(ptr + index + 2);
/* It is supposed that if we have an invalid pkt_tag or
* pkt_len then the whole input SKB is considered invalid
* and dropped; the associated packets already in skb_pool
* are dropped, too.
*/
if (pkt_tag != ATH_USB_RX_STREAM_MODE_TAG) {
RX_STAT_INC(hif_dev, skb_dropped);
goto invalid_pkt;
}
if (pkt_len > 2 * MAX_RX_BUF_SIZE) {
dev_err(&hif_dev->udev->dev,
"ath9k_htc: invalid pkt_len (%x)\n", pkt_len);
RX_STAT_INC(hif_dev, skb_dropped);
goto invalid_pkt;
}
pad_len = 4 - (pkt_len & 0x3);
if (pad_len == 4)
pad_len = 0;
chk_idx = index;
index = index + 4 + pkt_len + pad_len;
if (index > MAX_RX_BUF_SIZE) {
spin_lock(&hif_dev->rx_lock);
nskb = __dev_alloc_skb(pkt_len + 32, GFP_ATOMIC);
if (!nskb) {
dev_err(&hif_dev->udev->dev,
"ath9k_htc: RX memory allocation error\n");
spin_unlock(&hif_dev->rx_lock);
goto err;
}
hif_dev->rx_remain_len = index - MAX_RX_BUF_SIZE;
hif_dev->rx_transfer_len =
MAX_RX_BUF_SIZE - chk_idx - 4;
hif_dev->rx_pad_len = pad_len;
skb_reserve(nskb, 32);
RX_STAT_INC(hif_dev, skb_allocated);
memcpy(nskb->data, &(skb->data[chk_idx+4]),
hif_dev->rx_transfer_len);
/* Record the buffer pointer */
hif_dev->remain_skb = nskb;
spin_unlock(&hif_dev->rx_lock);
} else {
if (pool_index == MAX_PKT_NUM_IN_TRANSFER) {
dev_err(&hif_dev->udev->dev,
"ath9k_htc: over RX MAX_PKT_NUM\n");
goto err;
}
nskb = __dev_alloc_skb(pkt_len + 32, GFP_ATOMIC);
if (!nskb) {
dev_err(&hif_dev->udev->dev,
"ath9k_htc: RX memory allocation error\n");
goto err;
}
skb_reserve(nskb, 32);
RX_STAT_INC(hif_dev, skb_allocated);
memcpy(nskb->data, &(skb->data[chk_idx+4]), pkt_len);
skb_put(nskb, pkt_len);
skb_pool[pool_index++] = nskb;
}
}
err:
for (i = 0; i < pool_index; i++) {
RX_STAT_ADD(hif_dev, skb_completed_bytes, skb_pool[i]->len);
ath9k_htc_rx_msg(hif_dev->htc_handle, skb_pool[i],
skb_pool[i]->len, USB_WLAN_RX_PIPE);
RX_STAT_INC(hif_dev, skb_completed);
}
return;
invalid_pkt:
for (i = 0; i < pool_index; i++) {
dev_kfree_skb_any(skb_pool[i]);
RX_STAT_INC(hif_dev, skb_dropped);
}
return;
}
static void ath9k_hif_usb_rx_cb(struct urb *urb)
{
struct rx_buf *rx_buf = (struct rx_buf *)urb->context;
struct hif_device_usb *hif_dev = rx_buf->hif_dev;
struct sk_buff *skb = rx_buf->skb;
int ret;
if (!skb)
return;
if (!hif_dev)
goto free;
switch (urb->status) {
case 0:
break;
case -ENOENT:
case -ECONNRESET:
case -ENODEV:
case -ESHUTDOWN:
goto free;
default:
goto resubmit;
}
if (likely(urb->actual_length != 0)) {
skb_put(skb, urb->actual_length);
ath9k_hif_usb_rx_stream(hif_dev, skb);
}
resubmit:
skb_reset_tail_pointer(skb);
skb_trim(skb, 0);
usb_anchor_urb(urb, &hif_dev->rx_submitted);
ret = usb_submit_urb(urb, GFP_ATOMIC);
if (ret) {
usb_unanchor_urb(urb);
goto free;
}
return;
free:
kfree_skb(skb);
kfree(rx_buf);
}
static void ath9k_hif_usb_reg_in_cb(struct urb *urb)
{
struct rx_buf *rx_buf = (struct rx_buf *)urb->context;
struct hif_device_usb *hif_dev = rx_buf->hif_dev;
struct sk_buff *skb = rx_buf->skb;
int ret;
if (!skb)
return;
if (!hif_dev)
goto free_skb;
switch (urb->status) {
case 0:
break;
case -ENOENT:
case -ECONNRESET:
case -ENODEV:
case -ESHUTDOWN:
goto free_skb;
default:
skb_reset_tail_pointer(skb);
skb_trim(skb, 0);
goto resubmit;
}
if (likely(urb->actual_length != 0)) {
skb_put(skb, urb->actual_length);
/*
* Process the command first.
* skb is either freed here or passed to be
* managed to another callback function.
*/
ath9k_htc_rx_msg(hif_dev->htc_handle, skb,
skb->len, USB_REG_IN_PIPE);
skb = alloc_skb(MAX_REG_IN_BUF_SIZE, GFP_ATOMIC);
if (!skb) {
dev_err(&hif_dev->udev->dev,
"ath9k_htc: REG_IN memory allocation failure\n");
goto free_rx_buf;
}
rx_buf->skb = skb;
usb_fill_int_urb(urb, hif_dev->udev,
usb_rcvintpipe(hif_dev->udev,
USB_REG_IN_PIPE),
skb->data, MAX_REG_IN_BUF_SIZE,
ath9k_hif_usb_reg_in_cb, rx_buf, 1);
}
resubmit:
usb_anchor_urb(urb, &hif_dev->reg_in_submitted);
ret = usb_submit_urb(urb, GFP_ATOMIC);
if (ret) {
usb_unanchor_urb(urb);
goto free_skb;
}
return;
free_skb:
kfree_skb(skb);
free_rx_buf:
kfree(rx_buf);
urb->context = NULL;
}
static void ath9k_hif_usb_dealloc_tx_urbs(struct hif_device_usb *hif_dev)
{
struct tx_buf *tx_buf = NULL, *tx_buf_tmp = NULL;
unsigned long flags;
spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
list_for_each_entry_safe(tx_buf, tx_buf_tmp,
&hif_dev->tx.tx_buf, list) {
list_del(&tx_buf->list);
usb_free_urb(tx_buf->urb);
kfree(tx_buf->buf);
kfree(tx_buf);
}
spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
hif_dev->tx.flags |= HIF_USB_TX_FLUSH;
spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
list_for_each_entry_safe(tx_buf, tx_buf_tmp,
&hif_dev->tx.tx_pending, list) {
usb_get_urb(tx_buf->urb);
spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
usb_kill_urb(tx_buf->urb);
list_del(&tx_buf->list);
usb_free_urb(tx_buf->urb);
kfree(tx_buf->buf);
kfree(tx_buf);
spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
}
spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
usb_kill_anchored_urbs(&hif_dev->mgmt_submitted);
}
static int ath9k_hif_usb_alloc_tx_urbs(struct hif_device_usb *hif_dev)
{
struct tx_buf *tx_buf;
int i;
INIT_LIST_HEAD(&hif_dev->tx.tx_buf);
INIT_LIST_HEAD(&hif_dev->tx.tx_pending);
spin_lock_init(&hif_dev->tx.tx_lock);
__skb_queue_head_init(&hif_dev->tx.tx_skb_queue);
init_usb_anchor(&hif_dev->mgmt_submitted);
for (i = 0; i < MAX_TX_URB_NUM; i++) {
tx_buf = kzalloc(sizeof(*tx_buf), GFP_KERNEL);
if (!tx_buf)
goto err;
tx_buf->buf = kzalloc(MAX_TX_BUF_SIZE, GFP_KERNEL);
if (!tx_buf->buf)
goto err;
tx_buf->urb = usb_alloc_urb(0, GFP_KERNEL);
if (!tx_buf->urb)
goto err;
tx_buf->hif_dev = hif_dev;
__skb_queue_head_init(&tx_buf->skb_queue);
list_add_tail(&tx_buf->list, &hif_dev->tx.tx_buf);
}
hif_dev->tx.tx_buf_cnt = MAX_TX_URB_NUM;
return 0;
err:
if (tx_buf) {
kfree(tx_buf->buf);
kfree(tx_buf);
}
ath9k_hif_usb_dealloc_tx_urbs(hif_dev);
return -ENOMEM;
}
static void ath9k_hif_usb_dealloc_rx_urbs(struct hif_device_usb *hif_dev)
{
usb_kill_anchored_urbs(&hif_dev->rx_submitted);
ath9k_hif_usb_free_rx_remain_skb(hif_dev);
}
static int ath9k_hif_usb_alloc_rx_urbs(struct hif_device_usb *hif_dev)
{
struct rx_buf *rx_buf = NULL;
struct sk_buff *skb = NULL;
struct urb *urb = NULL;
int i, ret;
init_usb_anchor(&hif_dev->rx_submitted);
spin_lock_init(&hif_dev->rx_lock);
for (i = 0; i < MAX_RX_URB_NUM; i++) {
rx_buf = kzalloc(sizeof(*rx_buf), GFP_KERNEL);
if (!rx_buf) {
ret = -ENOMEM;
goto err_rxb;
}
/* Allocate URB */
urb = usb_alloc_urb(0, GFP_KERNEL);
if (urb == NULL) {
ret = -ENOMEM;
goto err_urb;
}
/* Allocate buffer */
skb = alloc_skb(MAX_RX_BUF_SIZE, GFP_KERNEL);
if (!skb) {
ret = -ENOMEM;
goto err_skb;
}
rx_buf->hif_dev = hif_dev;
rx_buf->skb = skb;
usb_fill_bulk_urb(urb, hif_dev->udev,
usb_rcvbulkpipe(hif_dev->udev,
USB_WLAN_RX_PIPE),
skb->data, MAX_RX_BUF_SIZE,
ath9k_hif_usb_rx_cb, rx_buf);
/* Anchor URB */
usb_anchor_urb(urb, &hif_dev->rx_submitted);
/* Submit URB */
ret = usb_submit_urb(urb, GFP_KERNEL);
if (ret) {
usb_unanchor_urb(urb);
goto err_submit;
}
/*
* Drop reference count.
* This ensures that the URB is freed when killing them.
*/
usb_free_urb(urb);
}
return 0;
err_submit:
kfree_skb(skb);
err_skb:
usb_free_urb(urb);
err_urb:
kfree(rx_buf);
err_rxb:
ath9k_hif_usb_dealloc_rx_urbs(hif_dev);
return ret;
}
static void ath9k_hif_usb_dealloc_reg_in_urbs(struct hif_device_usb *hif_dev)
{
usb_kill_anchored_urbs(&hif_dev->reg_in_submitted);
}
static int ath9k_hif_usb_alloc_reg_in_urbs(struct hif_device_usb *hif_dev)
{
struct rx_buf *rx_buf = NULL;
struct sk_buff *skb = NULL;
struct urb *urb = NULL;
int i, ret;
init_usb_anchor(&hif_dev->reg_in_submitted);
for (i = 0; i < MAX_REG_IN_URB_NUM; i++) {
rx_buf = kzalloc(sizeof(*rx_buf), GFP_KERNEL);
if (!rx_buf) {
ret = -ENOMEM;
goto err_rxb;
}
/* Allocate URB */
urb = usb_alloc_urb(0, GFP_KERNEL);
if (urb == NULL) {
ret = -ENOMEM;
goto err_urb;
}
/* Allocate buffer */
skb = alloc_skb(MAX_REG_IN_BUF_SIZE, GFP_KERNEL);
if (!skb) {
ret = -ENOMEM;
goto err_skb;
}
rx_buf->hif_dev = hif_dev;
rx_buf->skb = skb;
usb_fill_int_urb(urb, hif_dev->udev,
usb_rcvintpipe(hif_dev->udev,
USB_REG_IN_PIPE),
skb->data, MAX_REG_IN_BUF_SIZE,
ath9k_hif_usb_reg_in_cb, rx_buf, 1);
/* Anchor URB */
usb_anchor_urb(urb, &hif_dev->reg_in_submitted);
/* Submit URB */
ret = usb_submit_urb(urb, GFP_KERNEL);
if (ret) {
usb_unanchor_urb(urb);
goto err_submit;
}
/*
* Drop reference count.
* This ensures that the URB is freed when killing them.
*/
usb_free_urb(urb);
}
return 0;
err_submit:
kfree_skb(skb);
err_skb:
usb_free_urb(urb);
err_urb:
kfree(rx_buf);
err_rxb:
ath9k_hif_usb_dealloc_reg_in_urbs(hif_dev);
return ret;
}
static int ath9k_hif_usb_alloc_urbs(struct hif_device_usb *hif_dev)
{
/* Register Write */
init_usb_anchor(&hif_dev->regout_submitted);
/* TX */
if (ath9k_hif_usb_alloc_tx_urbs(hif_dev) < 0)
goto err;
/* RX */
if (ath9k_hif_usb_alloc_rx_urbs(hif_dev) < 0)
goto err_rx;
/* Register Read */
if (ath9k_hif_usb_alloc_reg_in_urbs(hif_dev) < 0)
goto err_reg;
return 0;
err_reg:
ath9k_hif_usb_dealloc_rx_urbs(hif_dev);
err_rx:
ath9k_hif_usb_dealloc_tx_urbs(hif_dev);
err:
return -ENOMEM;
}
void ath9k_hif_usb_dealloc_urbs(struct hif_device_usb *hif_dev)
{
usb_kill_anchored_urbs(&hif_dev->regout_submitted);
ath9k_hif_usb_dealloc_reg_in_urbs(hif_dev);
ath9k_hif_usb_dealloc_tx_urbs(hif_dev);
ath9k_hif_usb_dealloc_rx_urbs(hif_dev);
}
static int ath9k_hif_usb_download_fw(struct hif_device_usb *hif_dev)
{
int transfer, err;
const void *data = hif_dev->fw_data;
size_t len = hif_dev->fw_size;
u32 addr = AR9271_FIRMWARE;
u8 *buf = kzalloc(4096, GFP_KERNEL);
u32 firm_offset;
if (!buf)
return -ENOMEM;
while (len) {
transfer = min_t(size_t, len, 4096);
memcpy(buf, data, transfer);
err = usb_control_msg(hif_dev->udev,
usb_sndctrlpipe(hif_dev->udev, 0),
FIRMWARE_DOWNLOAD, 0x40 | USB_DIR_OUT,
addr >> 8, 0, buf, transfer,
USB_MSG_TIMEOUT);
if (err < 0) {
kfree(buf);
return err;
}
len -= transfer;
data += transfer;
addr += transfer;
}
kfree(buf);
if (IS_AR7010_DEVICE(hif_dev->usb_device_id->driver_info))
firm_offset = AR7010_FIRMWARE_TEXT;
else
firm_offset = AR9271_FIRMWARE_TEXT;
/*
* Issue FW download complete command to firmware.
*/
err = usb_control_msg(hif_dev->udev, usb_sndctrlpipe(hif_dev->udev, 0),
FIRMWARE_DOWNLOAD_COMP,
0x40 | USB_DIR_OUT,
firm_offset >> 8, 0, NULL, 0, USB_MSG_TIMEOUT);
if (err)
return -EIO;
dev_info(&hif_dev->udev->dev, "ath9k_htc: Transferred FW: %s, size: %ld\n",
hif_dev->fw_name, (unsigned long) hif_dev->fw_size);
return 0;
}
static int ath9k_hif_usb_dev_init(struct hif_device_usb *hif_dev)
{
int ret;
ret = ath9k_hif_usb_download_fw(hif_dev);
if (ret) {
dev_err(&hif_dev->udev->dev,
"ath9k_htc: Firmware - %s download failed\n",
hif_dev->fw_name);
return ret;
}
/* Alloc URBs */
ret = ath9k_hif_usb_alloc_urbs(hif_dev);
if (ret) {
dev_err(&hif_dev->udev->dev,
"ath9k_htc: Unable to allocate URBs\n");
return ret;
}
return 0;
}
static void ath9k_hif_usb_dev_deinit(struct hif_device_usb *hif_dev)
{
ath9k_hif_usb_dealloc_urbs(hif_dev);
}
/*
* If initialization fails or the FW cannot be retrieved,
* detach the device.
*/
static void ath9k_hif_usb_firmware_fail(struct hif_device_usb *hif_dev)
{
struct device *dev = &hif_dev->udev->dev;
struct device *parent = dev->parent;
complete_all(&hif_dev->fw_done);
if (parent)
device_lock(parent);
device_release_driver(dev);
if (parent)
device_unlock(parent);
}
static void ath9k_hif_usb_firmware_cb(const struct firmware *fw, void *context);
/* taken from iwlwifi */
static int ath9k_hif_request_firmware(struct hif_device_usb *hif_dev,
bool first)
{
char index[8], *chip;
int ret;
if (first) {
if (htc_use_dev_fw) {
hif_dev->fw_minor_index = FIRMWARE_MINOR_IDX_MAX + 1;
sprintf(index, "%s", "dev");
} else {
hif_dev->fw_minor_index = FIRMWARE_MINOR_IDX_MAX;
sprintf(index, "%d", hif_dev->fw_minor_index);
}
} else {
hif_dev->fw_minor_index--;
sprintf(index, "%d", hif_dev->fw_minor_index);
}
/* test for FW 1.3 */
if (MAJOR_VERSION_REQ == 1 && hif_dev->fw_minor_index == 3) {
const char *filename;
if (IS_AR7010_DEVICE(hif_dev->usb_device_id->driver_info))
filename = FIRMWARE_AR7010_1_1;
else
filename = FIRMWARE_AR9271;
/* expected fw locations:
* - htc_9271.fw (stable version 1.3, depricated)
*/
snprintf(hif_dev->fw_name, sizeof(hif_dev->fw_name),
"%s", filename);
} else if (hif_dev->fw_minor_index < FIRMWARE_MINOR_IDX_MIN) {
dev_err(&hif_dev->udev->dev, "no suitable firmware found!\n");
return -ENOENT;
} else {
if (IS_AR7010_DEVICE(hif_dev->usb_device_id->driver_info))
chip = "7010";
else
chip = "9271";
/* expected fw locations:
* - ath9k_htc/htc_9271-1.dev.0.fw (development version)
* - ath9k_htc/htc_9271-1.4.0.fw (stable version)
*/
snprintf(hif_dev->fw_name, sizeof(hif_dev->fw_name),
"%s/htc_%s-%d.%s.0.fw", HTC_FW_PATH,
chip, MAJOR_VERSION_REQ, index);
}
ret = request_firmware_nowait(THIS_MODULE, true, hif_dev->fw_name,
&hif_dev->udev->dev, GFP_KERNEL,
hif_dev, ath9k_hif_usb_firmware_cb);
if (ret) {
dev_err(&hif_dev->udev->dev,
"ath9k_htc: Async request for firmware %s failed\n",
hif_dev->fw_name);
return ret;
}
dev_info(&hif_dev->udev->dev, "ath9k_htc: Firmware %s requested\n",
hif_dev->fw_name);
return ret;
}
static void ath9k_hif_usb_firmware_cb(const struct firmware *fw, void *context)
{
struct hif_device_usb *hif_dev = context;
int ret;
if (!fw) {
ret = ath9k_hif_request_firmware(hif_dev, false);
if (!ret)
return;
dev_err(&hif_dev->udev->dev,
"ath9k_htc: Failed to get firmware %s\n",
hif_dev->fw_name);
goto err_fw;
}
hif_dev->htc_handle = ath9k_htc_hw_alloc(hif_dev, &hif_usb,
&hif_dev->udev->dev);
if (hif_dev->htc_handle == NULL)
goto err_dev_alloc;
hif_dev->fw_data = fw->data;
hif_dev->fw_size = fw->size;
/* Proceed with initialization */
ret = ath9k_hif_usb_dev_init(hif_dev);
if (ret)
goto err_dev_init;
ret = ath9k_htc_hw_init(hif_dev->htc_handle,
&hif_dev->interface->dev,
hif_dev->usb_device_id->idProduct,
hif_dev->udev->product,
hif_dev->usb_device_id->driver_info);
if (ret) {
ret = -EINVAL;
goto err_htc_hw_init;
}
release_firmware(fw);
hif_dev->flags |= HIF_USB_READY;
complete_all(&hif_dev->fw_done);
return;
err_htc_hw_init:
ath9k_hif_usb_dev_deinit(hif_dev);
err_dev_init:
ath9k_htc_hw_free(hif_dev->htc_handle);
err_dev_alloc:
release_firmware(fw);
err_fw:
ath9k_hif_usb_firmware_fail(hif_dev);
}
/*
* An exact copy of the function from zd1211rw.
*/
static int send_eject_command(struct usb_interface *interface)
{
struct usb_device *udev = interface_to_usbdev(interface);
struct usb_host_interface *iface_desc = interface->cur_altsetting;
struct usb_endpoint_descriptor *endpoint;
unsigned char *cmd;
u8 bulk_out_ep;
int r;
if (iface_desc->desc.bNumEndpoints < 2)
return -ENODEV;
/* Find bulk out endpoint */
for (r = 1; r >= 0; r--) {
endpoint = &iface_desc->endpoint[r].desc;
if (usb_endpoint_dir_out(endpoint) &&
usb_endpoint_xfer_bulk(endpoint)) {
bulk_out_ep = endpoint->bEndpointAddress;
break;
}
}
if (r == -1) {
dev_err(&udev->dev,
"ath9k_htc: Could not find bulk out endpoint\n");
return -ENODEV;
}
cmd = kzalloc(31, GFP_KERNEL);
if (cmd == NULL)
return -ENODEV;
/* USB bulk command block */
cmd[0] = 0x55; /* bulk command signature */
cmd[1] = 0x53; /* bulk command signature */
cmd[2] = 0x42; /* bulk command signature */
cmd[3] = 0x43; /* bulk command signature */
cmd[14] = 6; /* command length */
cmd[15] = 0x1b; /* SCSI command: START STOP UNIT */
cmd[19] = 0x2; /* eject disc */
dev_info(&udev->dev, "Ejecting storage device...\n");
r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, bulk_out_ep),
cmd, 31, NULL, 2 * USB_MSG_TIMEOUT);
kfree(cmd);
if (r)
return r;
/* At this point, the device disconnects and reconnects with the real
* ID numbers. */
usb_set_intfdata(interface, NULL);
return 0;
}
static int ath9k_hif_usb_probe(struct usb_interface *interface,
const struct usb_device_id *id)
{
struct usb_endpoint_descriptor *bulk_in, *bulk_out, *int_in, *int_out;
struct usb_device *udev = interface_to_usbdev(interface);
struct usb_host_interface *alt;
struct hif_device_usb *hif_dev;
int ret = 0;
/* Verify the expected endpoints are present */
alt = interface->cur_altsetting;
if (usb_find_common_endpoints(alt, &bulk_in, &bulk_out, &int_in, &int_out) < 0 ||
usb_endpoint_num(bulk_in) != USB_WLAN_RX_PIPE ||
usb_endpoint_num(bulk_out) != USB_WLAN_TX_PIPE ||
usb_endpoint_num(int_in) != USB_REG_IN_PIPE ||
usb_endpoint_num(int_out) != USB_REG_OUT_PIPE) {
dev_err(&udev->dev,
"ath9k_htc: Device endpoint numbers are not the expected ones\n");
return -ENODEV;
}
if (id->driver_info == STORAGE_DEVICE)
return send_eject_command(interface);
hif_dev = kzalloc(sizeof(struct hif_device_usb), GFP_KERNEL);
if (!hif_dev) {
ret = -ENOMEM;
goto err_alloc;
}
usb_get_dev(udev);
hif_dev->udev = udev;
hif_dev->interface = interface;
hif_dev->usb_device_id = id;
#ifdef CONFIG_PM
udev->reset_resume = 1;
#endif
usb_set_intfdata(interface, hif_dev);
init_completion(&hif_dev->fw_done);
ret = ath9k_hif_request_firmware(hif_dev, true);
if (ret)
goto err_fw_req;
return ret;
err_fw_req:
usb_set_intfdata(interface, NULL);
kfree(hif_dev);
usb_put_dev(udev);
err_alloc:
return ret;
}
static void ath9k_hif_usb_reboot(struct usb_device *udev)
{
u32 reboot_cmd = 0xffffffff;
void *buf;
int ret;
buf = kmemdup(&reboot_cmd, 4, GFP_KERNEL);
if (!buf)
return;
ret = usb_interrupt_msg(udev, usb_sndintpipe(udev, USB_REG_OUT_PIPE),
buf, 4, NULL, USB_MSG_TIMEOUT);
if (ret)
dev_err(&udev->dev, "ath9k_htc: USB reboot failed\n");
kfree(buf);
}
static void ath9k_hif_usb_disconnect(struct usb_interface *interface)
{
struct usb_device *udev = interface_to_usbdev(interface);
struct hif_device_usb *hif_dev = usb_get_intfdata(interface);
bool unplugged = (udev->state == USB_STATE_NOTATTACHED) ? true : false;
if (!hif_dev)
return;
wait_for_completion(&hif_dev->fw_done);
if (hif_dev->flags & HIF_USB_READY) {
ath9k_htc_hw_deinit(hif_dev->htc_handle, unplugged);
ath9k_htc_hw_free(hif_dev->htc_handle);
}
usb_set_intfdata(interface, NULL);
/* If firmware was loaded we should drop it
* go back to first stage bootloader. */
if (!unplugged && (hif_dev->flags & HIF_USB_READY))
ath9k_hif_usb_reboot(udev);
kfree(hif_dev);
dev_info(&udev->dev, "ath9k_htc: USB layer deinitialized\n");
usb_put_dev(udev);
}
#ifdef CONFIG_PM
static int ath9k_hif_usb_suspend(struct usb_interface *interface,
pm_message_t message)
{
struct hif_device_usb *hif_dev = usb_get_intfdata(interface);
/*
* The device has to be set to FULLSLEEP mode in case no
* interface is up.
*/
if (!(hif_dev->flags & HIF_USB_START))
ath9k_htc_suspend(hif_dev->htc_handle);
wait_for_completion(&hif_dev->fw_done);
if (hif_dev->flags & HIF_USB_READY)
ath9k_hif_usb_dealloc_urbs(hif_dev);
return 0;
}
static int ath9k_hif_usb_resume(struct usb_interface *interface)
{
struct hif_device_usb *hif_dev = usb_get_intfdata(interface);
struct htc_target *htc_handle = hif_dev->htc_handle;
int ret;
const struct firmware *fw;
ret = ath9k_hif_usb_alloc_urbs(hif_dev);
if (ret)
return ret;
if (hif_dev->flags & HIF_USB_READY) {
/* request cached firmware during suspend/resume cycle */
ret = request_firmware(&fw, hif_dev->fw_name,
&hif_dev->udev->dev);
if (ret)
goto fail_resume;
hif_dev->fw_data = fw->data;
hif_dev->fw_size = fw->size;
ret = ath9k_hif_usb_download_fw(hif_dev);
release_firmware(fw);
if (ret)
goto fail_resume;
} else {
ath9k_hif_usb_dealloc_urbs(hif_dev);
return -EIO;
}
mdelay(100);
ret = ath9k_htc_resume(htc_handle);
if (ret)
goto fail_resume;
return 0;
fail_resume:
ath9k_hif_usb_dealloc_urbs(hif_dev);
return ret;
}
#endif
static struct usb_driver ath9k_hif_usb_driver = {
.name = KBUILD_MODNAME,
.probe = ath9k_hif_usb_probe,
.disconnect = ath9k_hif_usb_disconnect,
#ifdef CONFIG_PM
.suspend = ath9k_hif_usb_suspend,
.resume = ath9k_hif_usb_resume,
.reset_resume = ath9k_hif_usb_resume,
#endif
.id_table = ath9k_hif_usb_ids,
.soft_unbind = 1,
.disable_hub_initiated_lpm = 1,
};
int ath9k_hif_usb_init(void)
{
return usb_register(&ath9k_hif_usb_driver);
}
void ath9k_hif_usb_exit(void)
{
usb_deregister(&ath9k_hif_usb_driver);
}