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/*
* Copyright (c) 2007-2011 Atheros Communications Inc.
* Copyright (c) 2011-2012 Qualcomm Atheros, 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 <linux/module.h>
#include <linux/usb.h>
#include "debug.h"
#include "core.h"
/* constants */
#define TX_URB_COUNT 32
#define RX_URB_COUNT 32
#define ATH6KL_USB_RX_BUFFER_SIZE 4096
/* tx/rx pipes for usb */
enum ATH6KL_USB_PIPE_ID {
ATH6KL_USB_PIPE_TX_CTRL = 0,
ATH6KL_USB_PIPE_TX_DATA_LP,
ATH6KL_USB_PIPE_TX_DATA_MP,
ATH6KL_USB_PIPE_TX_DATA_HP,
ATH6KL_USB_PIPE_RX_CTRL,
ATH6KL_USB_PIPE_RX_DATA,
ATH6KL_USB_PIPE_RX_DATA2,
ATH6KL_USB_PIPE_RX_INT,
ATH6KL_USB_PIPE_MAX
};
#define ATH6KL_USB_PIPE_INVALID ATH6KL_USB_PIPE_MAX
struct ath6kl_usb_pipe {
struct list_head urb_list_head;
struct usb_anchor urb_submitted;
u32 urb_alloc;
u32 urb_cnt;
u32 urb_cnt_thresh;
unsigned int usb_pipe_handle;
u32 flags;
u8 ep_address;
u8 logical_pipe_num;
struct ath6kl_usb *ar_usb;
u16 max_packet_size;
struct work_struct io_complete_work;
struct sk_buff_head io_comp_queue;
struct usb_endpoint_descriptor *ep_desc;
};
#define ATH6KL_USB_PIPE_FLAG_TX (1 << 0)
/* usb device object */
struct ath6kl_usb {
/* protects pipe->urb_list_head and pipe->urb_cnt */
spinlock_t cs_lock;
struct usb_device *udev;
struct usb_interface *interface;
struct ath6kl_usb_pipe pipes[ATH6KL_USB_PIPE_MAX];
u8 *diag_cmd_buffer;
u8 *diag_resp_buffer;
struct ath6kl *ar;
};
/* usb urb object */
struct ath6kl_urb_context {
struct list_head link;
struct ath6kl_usb_pipe *pipe;
struct sk_buff *skb;
struct ath6kl *ar;
};
/* USB endpoint definitions */
#define ATH6KL_USB_EP_ADDR_APP_CTRL_IN 0x81
#define ATH6KL_USB_EP_ADDR_APP_DATA_IN 0x82
#define ATH6KL_USB_EP_ADDR_APP_DATA2_IN 0x83
#define ATH6KL_USB_EP_ADDR_APP_INT_IN 0x84
#define ATH6KL_USB_EP_ADDR_APP_CTRL_OUT 0x01
#define ATH6KL_USB_EP_ADDR_APP_DATA_LP_OUT 0x02
#define ATH6KL_USB_EP_ADDR_APP_DATA_MP_OUT 0x03
#define ATH6KL_USB_EP_ADDR_APP_DATA_HP_OUT 0x04
/* diagnostic command defnitions */
#define ATH6KL_USB_CONTROL_REQ_SEND_BMI_CMD 1
#define ATH6KL_USB_CONTROL_REQ_RECV_BMI_RESP 2
#define ATH6KL_USB_CONTROL_REQ_DIAG_CMD 3
#define ATH6KL_USB_CONTROL_REQ_DIAG_RESP 4
#define ATH6KL_USB_CTRL_DIAG_CC_READ 0
#define ATH6KL_USB_CTRL_DIAG_CC_WRITE 1
struct ath6kl_usb_ctrl_diag_cmd_write {
__le32 cmd;
__le32 address;
__le32 value;
__le32 _pad[1];
} __packed;
struct ath6kl_usb_ctrl_diag_cmd_read {
__le32 cmd;
__le32 address;
} __packed;
struct ath6kl_usb_ctrl_diag_resp_read {
__le32 value;
} __packed;
/* function declarations */
static void ath6kl_usb_recv_complete(struct urb *urb);
#define ATH6KL_USB_IS_BULK_EP(attr) (((attr) & 3) == 0x02)
#define ATH6KL_USB_IS_INT_EP(attr) (((attr) & 3) == 0x03)
#define ATH6KL_USB_IS_ISOC_EP(attr) (((attr) & 3) == 0x01)
#define ATH6KL_USB_IS_DIR_IN(addr) ((addr) & 0x80)
/* pipe/urb operations */
static struct ath6kl_urb_context *
ath6kl_usb_alloc_urb_from_pipe(struct ath6kl_usb_pipe *pipe)
{
struct ath6kl_urb_context *urb_context = NULL;
unsigned long flags;
spin_lock_irqsave(&pipe->ar_usb->cs_lock, flags);
if (!list_empty(&pipe->urb_list_head)) {
urb_context =
list_first_entry(&pipe->urb_list_head,
struct ath6kl_urb_context, link);
list_del(&urb_context->link);
pipe->urb_cnt--;
}
spin_unlock_irqrestore(&pipe->ar_usb->cs_lock, flags);
return urb_context;
}
static void ath6kl_usb_free_urb_to_pipe(struct ath6kl_usb_pipe *pipe,
struct ath6kl_urb_context *urb_context)
{
unsigned long flags;
spin_lock_irqsave(&pipe->ar_usb->cs_lock, flags);
pipe->urb_cnt++;
list_add(&urb_context->link, &pipe->urb_list_head);
spin_unlock_irqrestore(&pipe->ar_usb->cs_lock, flags);
}
static void ath6kl_usb_cleanup_recv_urb(struct ath6kl_urb_context *urb_context)
{
dev_kfree_skb(urb_context->skb);
urb_context->skb = NULL;
ath6kl_usb_free_urb_to_pipe(urb_context->pipe, urb_context);
}
static inline struct ath6kl_usb *ath6kl_usb_priv(struct ath6kl *ar)
{
return ar->hif_priv;
}
/* pipe resource allocation/cleanup */
static int ath6kl_usb_alloc_pipe_resources(struct ath6kl_usb_pipe *pipe,
int urb_cnt)
{
struct ath6kl_urb_context *urb_context;
int status = 0, i;
INIT_LIST_HEAD(&pipe->urb_list_head);
init_usb_anchor(&pipe->urb_submitted);
for (i = 0; i < urb_cnt; i++) {
urb_context = kzalloc(sizeof(struct ath6kl_urb_context),
GFP_KERNEL);
if (urb_context == NULL) {
status = -ENOMEM;
goto fail_alloc_pipe_resources;
}
urb_context->pipe = pipe;
/*
* we are only allocate the urb contexts here, the actual URB
* is allocated from the kernel as needed to do a transaction
*/
pipe->urb_alloc++;
ath6kl_usb_free_urb_to_pipe(pipe, urb_context);
}
ath6kl_dbg(ATH6KL_DBG_USB,
"ath6kl usb: alloc resources lpipe:%d hpipe:0x%X urbs:%d\n",
pipe->logical_pipe_num, pipe->usb_pipe_handle,
pipe->urb_alloc);
fail_alloc_pipe_resources:
return status;
}
static void ath6kl_usb_free_pipe_resources(struct ath6kl_usb_pipe *pipe)
{
struct ath6kl_urb_context *urb_context;
if (pipe->ar_usb == NULL) {
/* nothing allocated for this pipe */
return;
}
ath6kl_dbg(ATH6KL_DBG_USB,
"ath6kl usb: free resources lpipe:%d"
"hpipe:0x%X urbs:%d avail:%d\n",
pipe->logical_pipe_num, pipe->usb_pipe_handle,
pipe->urb_alloc, pipe->urb_cnt);
if (pipe->urb_alloc != pipe->urb_cnt) {
ath6kl_dbg(ATH6KL_DBG_USB,
"ath6kl usb: urb leak! lpipe:%d"
"hpipe:0x%X urbs:%d avail:%d\n",
pipe->logical_pipe_num, pipe->usb_pipe_handle,
pipe->urb_alloc, pipe->urb_cnt);
}
while (true) {
urb_context = ath6kl_usb_alloc_urb_from_pipe(pipe);
if (urb_context == NULL)
break;
kfree(urb_context);
}
}
static void ath6kl_usb_cleanup_pipe_resources(struct ath6kl_usb *ar_usb)
{
int i;
for (i = 0; i < ATH6KL_USB_PIPE_MAX; i++)
ath6kl_usb_free_pipe_resources(&ar_usb->pipes[i]);
}
static u8 ath6kl_usb_get_logical_pipe_num(struct ath6kl_usb *ar_usb,
u8 ep_address, int *urb_count)
{
u8 pipe_num = ATH6KL_USB_PIPE_INVALID;
switch (ep_address) {
case ATH6KL_USB_EP_ADDR_APP_CTRL_IN:
pipe_num = ATH6KL_USB_PIPE_RX_CTRL;
*urb_count = RX_URB_COUNT;
break;
case ATH6KL_USB_EP_ADDR_APP_DATA_IN:
pipe_num = ATH6KL_USB_PIPE_RX_DATA;
*urb_count = RX_URB_COUNT;
break;
case ATH6KL_USB_EP_ADDR_APP_INT_IN:
pipe_num = ATH6KL_USB_PIPE_RX_INT;
*urb_count = RX_URB_COUNT;
break;
case ATH6KL_USB_EP_ADDR_APP_DATA2_IN:
pipe_num = ATH6KL_USB_PIPE_RX_DATA2;
*urb_count = RX_URB_COUNT;
break;
case ATH6KL_USB_EP_ADDR_APP_CTRL_OUT:
pipe_num = ATH6KL_USB_PIPE_TX_CTRL;
*urb_count = TX_URB_COUNT;
break;
case ATH6KL_USB_EP_ADDR_APP_DATA_LP_OUT:
pipe_num = ATH6KL_USB_PIPE_TX_DATA_LP;
*urb_count = TX_URB_COUNT;
break;
case ATH6KL_USB_EP_ADDR_APP_DATA_MP_OUT:
pipe_num = ATH6KL_USB_PIPE_TX_DATA_MP;
*urb_count = TX_URB_COUNT;
break;
case ATH6KL_USB_EP_ADDR_APP_DATA_HP_OUT:
pipe_num = ATH6KL_USB_PIPE_TX_DATA_HP;
*urb_count = TX_URB_COUNT;
break;
default:
/* note: there may be endpoints not currently used */
break;
}
return pipe_num;
}
static int ath6kl_usb_setup_pipe_resources(struct ath6kl_usb *ar_usb)
{
struct usb_interface *interface = ar_usb->interface;
struct usb_host_interface *iface_desc = interface->cur_altsetting;
struct usb_endpoint_descriptor *endpoint;
struct ath6kl_usb_pipe *pipe;
int i, urbcount, status = 0;
u8 pipe_num;
ath6kl_dbg(ATH6KL_DBG_USB, "setting up USB Pipes using interface\n");
/* walk decriptors and setup pipes */
for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
endpoint = &iface_desc->endpoint[i].desc;
if (ATH6KL_USB_IS_BULK_EP(endpoint->bmAttributes)) {
ath6kl_dbg(ATH6KL_DBG_USB,
"%s Bulk Ep:0x%2.2X maxpktsz:%d\n",
ATH6KL_USB_IS_DIR_IN
(endpoint->bEndpointAddress) ?
"RX" : "TX", endpoint->bEndpointAddress,
le16_to_cpu(endpoint->wMaxPacketSize));
} else if (ATH6KL_USB_IS_INT_EP(endpoint->bmAttributes)) {
ath6kl_dbg(ATH6KL_DBG_USB,
"%s Int Ep:0x%2.2X maxpktsz:%d interval:%d\n",
ATH6KL_USB_IS_DIR_IN
(endpoint->bEndpointAddress) ?
"RX" : "TX", endpoint->bEndpointAddress,
le16_to_cpu(endpoint->wMaxPacketSize),
endpoint->bInterval);
} else if (ATH6KL_USB_IS_ISOC_EP(endpoint->bmAttributes)) {
/* TODO for ISO */
ath6kl_dbg(ATH6KL_DBG_USB,
"%s ISOC Ep:0x%2.2X maxpktsz:%d interval:%d\n",
ATH6KL_USB_IS_DIR_IN
(endpoint->bEndpointAddress) ?
"RX" : "TX", endpoint->bEndpointAddress,
le16_to_cpu(endpoint->wMaxPacketSize),
endpoint->bInterval);
}
urbcount = 0;
pipe_num =
ath6kl_usb_get_logical_pipe_num(ar_usb,
endpoint->bEndpointAddress,
&urbcount);
if (pipe_num == ATH6KL_USB_PIPE_INVALID)
continue;
pipe = &ar_usb->pipes[pipe_num];
if (pipe->ar_usb != NULL) {
/* hmmm..pipe was already setup */
continue;
}
pipe->ar_usb = ar_usb;
pipe->logical_pipe_num = pipe_num;
pipe->ep_address = endpoint->bEndpointAddress;
pipe->max_packet_size = le16_to_cpu(endpoint->wMaxPacketSize);
if (ATH6KL_USB_IS_BULK_EP(endpoint->bmAttributes)) {
if (ATH6KL_USB_IS_DIR_IN(pipe->ep_address)) {
pipe->usb_pipe_handle =
usb_rcvbulkpipe(ar_usb->udev,
pipe->ep_address);
} else {
pipe->usb_pipe_handle =
usb_sndbulkpipe(ar_usb->udev,
pipe->ep_address);
}
} else if (ATH6KL_USB_IS_INT_EP(endpoint->bmAttributes)) {
if (ATH6KL_USB_IS_DIR_IN(pipe->ep_address)) {
pipe->usb_pipe_handle =
usb_rcvintpipe(ar_usb->udev,
pipe->ep_address);
} else {
pipe->usb_pipe_handle =
usb_sndintpipe(ar_usb->udev,
pipe->ep_address);
}
} else if (ATH6KL_USB_IS_ISOC_EP(endpoint->bmAttributes)) {
/* TODO for ISO */
if (ATH6KL_USB_IS_DIR_IN(pipe->ep_address)) {
pipe->usb_pipe_handle =
usb_rcvisocpipe(ar_usb->udev,
pipe->ep_address);
} else {
pipe->usb_pipe_handle =
usb_sndisocpipe(ar_usb->udev,
pipe->ep_address);
}
}
pipe->ep_desc = endpoint;
if (!ATH6KL_USB_IS_DIR_IN(pipe->ep_address))
pipe->flags |= ATH6KL_USB_PIPE_FLAG_TX;
status = ath6kl_usb_alloc_pipe_resources(pipe, urbcount);
if (status != 0)
break;
}
return status;
}
/* pipe operations */
static void ath6kl_usb_post_recv_transfers(struct ath6kl_usb_pipe *recv_pipe,
int buffer_length)
{
struct ath6kl_urb_context *urb_context;
struct urb *urb;
int usb_status;
while (true) {
urb_context = ath6kl_usb_alloc_urb_from_pipe(recv_pipe);
if (urb_context == NULL)
break;
urb_context->skb = dev_alloc_skb(buffer_length);
if (urb_context->skb == NULL)
goto err_cleanup_urb;
urb = usb_alloc_urb(0, GFP_ATOMIC);
if (urb == NULL)
goto err_cleanup_urb;
usb_fill_bulk_urb(urb,
recv_pipe->ar_usb->udev,
recv_pipe->usb_pipe_handle,
urb_context->skb->data,
buffer_length,
ath6kl_usb_recv_complete, urb_context);
ath6kl_dbg(ATH6KL_DBG_USB_BULK,
"ath6kl usb: bulk recv submit:%d, 0x%X (ep:0x%2.2X), %d bytes buf:0x%p\n",
recv_pipe->logical_pipe_num,
recv_pipe->usb_pipe_handle, recv_pipe->ep_address,
buffer_length, urb_context->skb);
usb_anchor_urb(urb, &recv_pipe->urb_submitted);
usb_status = usb_submit_urb(urb, GFP_ATOMIC);
if (usb_status) {
ath6kl_dbg(ATH6KL_DBG_USB_BULK,
"ath6kl usb : usb bulk recv failed %d\n",
usb_status);
usb_unanchor_urb(urb);
usb_free_urb(urb);
goto err_cleanup_urb;
}
usb_free_urb(urb);
}
return;
err_cleanup_urb:
ath6kl_usb_cleanup_recv_urb(urb_context);
return;
}
static void ath6kl_usb_flush_all(struct ath6kl_usb *ar_usb)
{
int i;
for (i = 0; i < ATH6KL_USB_PIPE_MAX; i++) {
if (ar_usb->pipes[i].ar_usb != NULL)
usb_kill_anchored_urbs(&ar_usb->pipes[i].urb_submitted);
}
/*
* Flushing any pending I/O may schedule work this call will block
* until all scheduled work runs to completion.
*/
flush_scheduled_work();
}
static void ath6kl_usb_start_recv_pipes(struct ath6kl_usb *ar_usb)
{
/*
* note: control pipe is no longer used
* ar_usb->pipes[ATH6KL_USB_PIPE_RX_CTRL].urb_cnt_thresh =
* ar_usb->pipes[ATH6KL_USB_PIPE_RX_CTRL].urb_alloc/2;
* ath6kl_usb_post_recv_transfers(&ar_usb->
* pipes[ATH6KL_USB_PIPE_RX_CTRL],
* ATH6KL_USB_RX_BUFFER_SIZE);
*/
ar_usb->pipes[ATH6KL_USB_PIPE_RX_DATA].urb_cnt_thresh = 1;
ath6kl_usb_post_recv_transfers(&ar_usb->pipes[ATH6KL_USB_PIPE_RX_DATA],
ATH6KL_USB_RX_BUFFER_SIZE);
}
/* hif usb rx/tx completion functions */
static void ath6kl_usb_recv_complete(struct urb *urb)
{
struct ath6kl_urb_context *urb_context = urb->context;
struct ath6kl_usb_pipe *pipe = urb_context->pipe;
struct sk_buff *skb = NULL;
int status = 0;
ath6kl_dbg(ATH6KL_DBG_USB_BULK,
"%s: recv pipe: %d, stat:%d, len:%d urb:0x%p\n", __func__,
pipe->logical_pipe_num, urb->status, urb->actual_length,
urb);
if (urb->status != 0) {
status = -EIO;
switch (urb->status) {
case -ECONNRESET:
case -ENOENT:
case -ESHUTDOWN:
/*
* no need to spew these errors when device
* removed or urb killed due to driver shutdown
*/
status = -ECANCELED;
break;
default:
ath6kl_dbg(ATH6KL_DBG_USB_BULK,
"%s recv pipe: %d (ep:0x%2.2X), failed:%d\n",
__func__, pipe->logical_pipe_num,
pipe->ep_address, urb->status);
break;
}
goto cleanup_recv_urb;
}
if (urb->actual_length == 0)
goto cleanup_recv_urb;
skb = urb_context->skb;
/* we are going to pass it up */
urb_context->skb = NULL;
skb_put(skb, urb->actual_length);
/* note: queue implements a lock */
skb_queue_tail(&pipe->io_comp_queue, skb);
schedule_work(&pipe->io_complete_work);
cleanup_recv_urb:
ath6kl_usb_cleanup_recv_urb(urb_context);
if (status == 0 &&
pipe->urb_cnt >= pipe->urb_cnt_thresh) {
/* our free urbs are piling up, post more transfers */
ath6kl_usb_post_recv_transfers(pipe, ATH6KL_USB_RX_BUFFER_SIZE);
}
}
static void ath6kl_usb_usb_transmit_complete(struct urb *urb)
{
struct ath6kl_urb_context *urb_context = urb->context;
struct ath6kl_usb_pipe *pipe = urb_context->pipe;
struct sk_buff *skb;
ath6kl_dbg(ATH6KL_DBG_USB_BULK,
"%s: pipe: %d, stat:%d, len:%d\n",
__func__, pipe->logical_pipe_num, urb->status,
urb->actual_length);
if (urb->status != 0) {
ath6kl_dbg(ATH6KL_DBG_USB_BULK,
"%s: pipe: %d, failed:%d\n",
__func__, pipe->logical_pipe_num, urb->status);
}
skb = urb_context->skb;
urb_context->skb = NULL;
ath6kl_usb_free_urb_to_pipe(urb_context->pipe, urb_context);
/* note: queue implements a lock */
skb_queue_tail(&pipe->io_comp_queue, skb);
schedule_work(&pipe->io_complete_work);
}
static void ath6kl_usb_io_comp_work(struct work_struct *work)
{
struct ath6kl_usb_pipe *pipe = container_of(work,
struct ath6kl_usb_pipe,
io_complete_work);
struct ath6kl_usb *ar_usb;
struct sk_buff *skb;
ar_usb = pipe->ar_usb;
while ((skb = skb_dequeue(&pipe->io_comp_queue))) {
if (pipe->flags & ATH6KL_USB_PIPE_FLAG_TX) {
ath6kl_dbg(ATH6KL_DBG_USB_BULK,
"ath6kl usb xmit callback buf:0x%p\n", skb);
ath6kl_core_tx_complete(ar_usb->ar, skb);
} else {
ath6kl_dbg(ATH6KL_DBG_USB_BULK,
"ath6kl usb recv callback buf:0x%p\n", skb);
ath6kl_core_rx_complete(ar_usb->ar, skb,
pipe->logical_pipe_num);
}
}
}
#define ATH6KL_USB_MAX_DIAG_CMD (sizeof(struct ath6kl_usb_ctrl_diag_cmd_write))
#define ATH6KL_USB_MAX_DIAG_RESP (sizeof(struct ath6kl_usb_ctrl_diag_resp_read))
static void ath6kl_usb_destroy(struct ath6kl_usb *ar_usb)
{
ath6kl_usb_flush_all(ar_usb);
ath6kl_usb_cleanup_pipe_resources(ar_usb);
usb_set_intfdata(ar_usb->interface, NULL);
kfree(ar_usb->diag_cmd_buffer);
kfree(ar_usb->diag_resp_buffer);
kfree(ar_usb);
}
static struct ath6kl_usb *ath6kl_usb_create(struct usb_interface *interface)
{
struct usb_device *dev = interface_to_usbdev(interface);
struct ath6kl_usb *ar_usb;
struct ath6kl_usb_pipe *pipe;
int status = 0;
int i;
ar_usb = kzalloc(sizeof(struct ath6kl_usb), GFP_KERNEL);
if (ar_usb == NULL)
goto fail_ath6kl_usb_create;
usb_set_intfdata(interface, ar_usb);
spin_lock_init(&(ar_usb->cs_lock));
ar_usb->udev = dev;
ar_usb->interface = interface;
for (i = 0; i < ATH6KL_USB_PIPE_MAX; i++) {
pipe = &ar_usb->pipes[i];
INIT_WORK(&pipe->io_complete_work,
ath6kl_usb_io_comp_work);
skb_queue_head_init(&pipe->io_comp_queue);
}
ar_usb->diag_cmd_buffer = kzalloc(ATH6KL_USB_MAX_DIAG_CMD, GFP_KERNEL);
if (ar_usb->diag_cmd_buffer == NULL) {
status = -ENOMEM;
goto fail_ath6kl_usb_create;
}
ar_usb->diag_resp_buffer = kzalloc(ATH6KL_USB_MAX_DIAG_RESP,
GFP_KERNEL);
if (ar_usb->diag_resp_buffer == NULL) {
status = -ENOMEM;
goto fail_ath6kl_usb_create;
}
status = ath6kl_usb_setup_pipe_resources(ar_usb);
fail_ath6kl_usb_create:
if (status != 0) {
ath6kl_usb_destroy(ar_usb);
ar_usb = NULL;
}
return ar_usb;
}
static void ath6kl_usb_device_detached(struct usb_interface *interface)
{
struct ath6kl_usb *ar_usb;
ar_usb = usb_get_intfdata(interface);
if (ar_usb == NULL)
return;
ath6kl_stop_txrx(ar_usb->ar);
/* Delay to wait for the target to reboot */
mdelay(20);
ath6kl_core_cleanup(ar_usb->ar);
ath6kl_usb_destroy(ar_usb);
}
/* exported hif usb APIs for htc pipe */
static void hif_start(struct ath6kl *ar)
{
struct ath6kl_usb *device = ath6kl_usb_priv(ar);
int i;
ath6kl_usb_start_recv_pipes(device);
/* set the TX resource avail threshold for each TX pipe */
for (i = ATH6KL_USB_PIPE_TX_CTRL;
i <= ATH6KL_USB_PIPE_TX_DATA_HP; i++) {
device->pipes[i].urb_cnt_thresh =
device->pipes[i].urb_alloc / 2;
}
}
static int ath6kl_usb_send(struct ath6kl *ar, u8 PipeID,
struct sk_buff *hdr_skb, struct sk_buff *skb)
{
struct ath6kl_usb *device = ath6kl_usb_priv(ar);
struct ath6kl_usb_pipe *pipe = &device->pipes[PipeID];
struct ath6kl_urb_context *urb_context;
int usb_status, status = 0;
struct urb *urb;
u8 *data;
u32 len;
ath6kl_dbg(ATH6KL_DBG_USB_BULK, "+%s pipe : %d, buf:0x%p\n",
__func__, PipeID, skb);
urb_context = ath6kl_usb_alloc_urb_from_pipe(pipe);
if (urb_context == NULL) {
/*
* TODO: it is possible to run out of urbs if
* 2 endpoints map to the same pipe ID
*/
ath6kl_dbg(ATH6KL_DBG_USB_BULK,
"%s pipe:%d no urbs left. URB Cnt : %d\n",
__func__, PipeID, pipe->urb_cnt);
status = -ENOMEM;
goto fail_hif_send;
}
urb_context->skb = skb;
data = skb->data;
len = skb->len;
urb = usb_alloc_urb(0, GFP_ATOMIC);
if (urb == NULL) {
status = -ENOMEM;
ath6kl_usb_free_urb_to_pipe(urb_context->pipe,
urb_context);
goto fail_hif_send;
}
usb_fill_bulk_urb(urb,
device->udev,
pipe->usb_pipe_handle,
data,
len,
ath6kl_usb_usb_transmit_complete, urb_context);
if ((len % pipe->max_packet_size) == 0) {
/* hit a max packet boundary on this pipe */
urb->transfer_flags |= URB_ZERO_PACKET;
}
ath6kl_dbg(ATH6KL_DBG_USB_BULK,
"athusb bulk send submit:%d, 0x%X (ep:0x%2.2X), %d bytes\n",
pipe->logical_pipe_num, pipe->usb_pipe_handle,
pipe->ep_address, len);
usb_anchor_urb(urb, &pipe->urb_submitted);
usb_status = usb_submit_urb(urb, GFP_ATOMIC);
if (usb_status) {
ath6kl_dbg(ATH6KL_DBG_USB_BULK,
"ath6kl usb : usb bulk transmit failed %d\n",
usb_status);
usb_unanchor_urb(urb);
ath6kl_usb_free_urb_to_pipe(urb_context->pipe,
urb_context);
status = -EINVAL;
}
usb_free_urb(urb);
fail_hif_send:
return status;
}
static void hif_stop(struct ath6kl *ar)
{
struct ath6kl_usb *device = ath6kl_usb_priv(ar);
ath6kl_usb_flush_all(device);
}
static void ath6kl_usb_get_default_pipe(struct ath6kl *ar,
u8 *ul_pipe, u8 *dl_pipe)
{
*ul_pipe = ATH6KL_USB_PIPE_TX_CTRL;
*dl_pipe = ATH6KL_USB_PIPE_RX_CTRL;
}
static int ath6kl_usb_map_service_pipe(struct ath6kl *ar, u16 svc_id,
u8 *ul_pipe, u8 *dl_pipe)
{
int status = 0;
switch (svc_id) {
case HTC_CTRL_RSVD_SVC:
case WMI_CONTROL_SVC:
*ul_pipe = ATH6KL_USB_PIPE_TX_CTRL;
/* due to large control packets, shift to data pipe */
*dl_pipe = ATH6KL_USB_PIPE_RX_DATA;
break;
case WMI_DATA_BE_SVC:
case WMI_DATA_BK_SVC:
*ul_pipe = ATH6KL_USB_PIPE_TX_DATA_LP;
/*
* Disable rxdata2 directly, it will be enabled
* if FW enable rxdata2
*/
*dl_pipe = ATH6KL_USB_PIPE_RX_DATA;
break;
case WMI_DATA_VI_SVC:
if (test_bit(ATH6KL_FW_CAPABILITY_MAP_LP_ENDPOINT,
ar->fw_capabilities))
*ul_pipe = ATH6KL_USB_PIPE_TX_DATA_LP;
else
*ul_pipe = ATH6KL_USB_PIPE_TX_DATA_MP;
/*
* Disable rxdata2 directly, it will be enabled
* if FW enable rxdata2
*/
*dl_pipe = ATH6KL_USB_PIPE_RX_DATA;
break;
case WMI_DATA_VO_SVC:
if (test_bit(ATH6KL_FW_CAPABILITY_MAP_LP_ENDPOINT,
ar->fw_capabilities))
*ul_pipe = ATH6KL_USB_PIPE_TX_DATA_LP;
else
*ul_pipe = ATH6KL_USB_PIPE_TX_DATA_MP;
/*
* Disable rxdata2 directly, it will be enabled
* if FW enable rxdata2
*/
*dl_pipe = ATH6KL_USB_PIPE_RX_DATA;
break;
default:
status = -EPERM;
break;
}
return status;
}
static u16 ath6kl_usb_get_free_queue_number(struct ath6kl *ar, u8 pipe_id)
{
struct ath6kl_usb *device = ath6kl_usb_priv(ar);
return device->pipes[pipe_id].urb_cnt;
}
static void hif_detach_htc(struct ath6kl *ar)
{
struct ath6kl_usb *device = ath6kl_usb_priv(ar);
ath6kl_usb_flush_all(device);
}
static int ath6kl_usb_submit_ctrl_out(struct ath6kl_usb *ar_usb,
u8 req, u16 value, u16 index, void *data,
u32 size)
{
u8 *buf = NULL;
int ret;
if (size > 0) {
buf = kmemdup(data, size, GFP_KERNEL);
if (buf == NULL)
return -ENOMEM;
}
/* note: if successful returns number of bytes transfered */
ret = usb_control_msg(ar_usb->udev,
usb_sndctrlpipe(ar_usb->udev, 0),
req,
USB_DIR_OUT | USB_TYPE_VENDOR |
USB_RECIP_DEVICE, value, index, buf,
size, 1000);
if (ret < 0) {
ath6kl_warn("Failed to submit usb control message: %d\n", ret);
kfree(buf);
return ret;
}
kfree(buf);
return 0;
}
static int ath6kl_usb_submit_ctrl_in(struct ath6kl_usb *ar_usb,
u8 req, u16 value, u16 index, void *data,
u32 size)
{
u8 *buf = NULL;
int ret;
if (size > 0) {
buf = kmalloc(size, GFP_KERNEL);
if (buf == NULL)
return -ENOMEM;
}
/* note: if successful returns number of bytes transfered */
ret = usb_control_msg(ar_usb->udev,
usb_rcvctrlpipe(ar_usb->udev, 0),
req,
USB_DIR_IN | USB_TYPE_VENDOR |
USB_RECIP_DEVICE, value, index, buf,
size, 2 * HZ);
if (ret < 0) {
ath6kl_warn("Failed to read usb control message: %d\n", ret);
kfree(buf);
return ret;
}
memcpy((u8 *) data, buf, size);
kfree(buf);
return 0;
}
static int ath6kl_usb_ctrl_msg_exchange(struct ath6kl_usb *ar_usb,
u8 req_val, u8 *req_buf, u32 req_len,
u8 resp_val, u8 *resp_buf, u32 *resp_len)
{
int ret;
/* send command */
ret = ath6kl_usb_submit_ctrl_out(ar_usb, req_val, 0, 0,
req_buf, req_len);
if (ret != 0)
return ret;
if (resp_buf == NULL) {
/* no expected response */
return ret;
}
/* get response */
ret = ath6kl_usb_submit_ctrl_in(ar_usb, resp_val, 0, 0,
resp_buf, *resp_len);
return ret;
}
static int ath6kl_usb_diag_read32(struct ath6kl *ar, u32 address, u32 *data)
{
struct ath6kl_usb *ar_usb = ar->hif_priv;
struct ath6kl_usb_ctrl_diag_resp_read *resp;
struct ath6kl_usb_ctrl_diag_cmd_read *cmd;
u32 resp_len;
int ret;
cmd = (struct ath6kl_usb_ctrl_diag_cmd_read *) ar_usb->diag_cmd_buffer;
memset(cmd, 0, sizeof(*cmd));
cmd->cmd = ATH6KL_USB_CTRL_DIAG_CC_READ;
cmd->address = cpu_to_le32(address);
resp_len = sizeof(*resp);
ret = ath6kl_usb_ctrl_msg_exchange(ar_usb,
ATH6KL_USB_CONTROL_REQ_DIAG_CMD,
(u8 *) cmd,
sizeof(struct ath6kl_usb_ctrl_diag_cmd_write),
ATH6KL_USB_CONTROL_REQ_DIAG_RESP,
ar_usb->diag_resp_buffer, &resp_len);
if (ret) {
ath6kl_warn("diag read32 failed: %d\n", ret);
return ret;
}
resp = (struct ath6kl_usb_ctrl_diag_resp_read *)
ar_usb->diag_resp_buffer;
*data = le32_to_cpu(resp->value);
return ret;
}
static int ath6kl_usb_diag_write32(struct ath6kl *ar, u32 address, __le32 data)
{
struct ath6kl_usb *ar_usb = ar->hif_priv;
struct ath6kl_usb_ctrl_diag_cmd_write *cmd;
int ret;
cmd = (struct ath6kl_usb_ctrl_diag_cmd_write *) ar_usb->diag_cmd_buffer;
memset(cmd, 0, sizeof(struct ath6kl_usb_ctrl_diag_cmd_write));
cmd->cmd = cpu_to_le32(ATH6KL_USB_CTRL_DIAG_CC_WRITE);
cmd->address = cpu_to_le32(address);
cmd->value = data;
ret = ath6kl_usb_ctrl_msg_exchange(ar_usb,
ATH6KL_USB_CONTROL_REQ_DIAG_CMD,
(u8 *) cmd,
sizeof(*cmd),
0, NULL, NULL);
if (ret) {
ath6kl_warn("diag_write32 failed: %d\n", ret);
return ret;
}
return 0;
}
static int ath6kl_usb_bmi_read(struct ath6kl *ar, u8 *buf, u32 len)
{
struct ath6kl_usb *ar_usb = ar->hif_priv;
int ret;
/* get response */
ret = ath6kl_usb_submit_ctrl_in(ar_usb,
ATH6KL_USB_CONTROL_REQ_RECV_BMI_RESP,
0, 0, buf, len);
if (ret) {
ath6kl_err("Unable to read the bmi data from the device: %d\n",
ret);
return ret;
}
return 0;
}
static int ath6kl_usb_bmi_write(struct ath6kl *ar, u8 *buf, u32 len)
{
struct ath6kl_usb *ar_usb = ar->hif_priv;
int ret;
/* send command */
ret = ath6kl_usb_submit_ctrl_out(ar_usb,
ATH6KL_USB_CONTROL_REQ_SEND_BMI_CMD,
0, 0, buf, len);
if (ret) {
ath6kl_err("unable to send the bmi data to the device: %d\n",
ret);
return ret;
}
return 0;
}
static int ath6kl_usb_power_on(struct ath6kl *ar)
{
hif_start(ar);
return 0;
}
static int ath6kl_usb_power_off(struct ath6kl *ar)
{
hif_detach_htc(ar);
return 0;
}
static void ath6kl_usb_stop(struct ath6kl *ar)
{
hif_stop(ar);
}
static void ath6kl_usb_cleanup_scatter(struct ath6kl *ar)
{
/*
* USB doesn't support it. Just return.
*/
return;
}
static int ath6kl_usb_suspend(struct ath6kl *ar, struct cfg80211_wowlan *wow)
{
/*
* cfg80211 suspend/WOW currently not supported for USB.
*/
return 0;
}
static int ath6kl_usb_resume(struct ath6kl *ar)
{
/*
* cfg80211 resume currently not supported for USB.
*/
return 0;
}
static const struct ath6kl_hif_ops ath6kl_usb_ops = {
.diag_read32 = ath6kl_usb_diag_read32,
.diag_write32 = ath6kl_usb_diag_write32,
.bmi_read = ath6kl_usb_bmi_read,
.bmi_write = ath6kl_usb_bmi_write,
.power_on = ath6kl_usb_power_on,
.power_off = ath6kl_usb_power_off,
.stop = ath6kl_usb_stop,
.pipe_send = ath6kl_usb_send,
.pipe_get_default = ath6kl_usb_get_default_pipe,
.pipe_map_service = ath6kl_usb_map_service_pipe,
.pipe_get_free_queue_number = ath6kl_usb_get_free_queue_number,
.cleanup_scatter = ath6kl_usb_cleanup_scatter,
.suspend = ath6kl_usb_suspend,
.resume = ath6kl_usb_resume,
};
/* ath6kl usb driver registered functions */
static int ath6kl_usb_probe(struct usb_interface *interface,
const struct usb_device_id *id)
{
struct usb_device *dev = interface_to_usbdev(interface);
struct ath6kl *ar;
struct ath6kl_usb *ar_usb = NULL;
int vendor_id, product_id;
int ret = 0;
usb_get_dev(dev);
vendor_id = le16_to_cpu(dev->descriptor.idVendor);
product_id = le16_to_cpu(dev->descriptor.idProduct);
ath6kl_dbg(ATH6KL_DBG_USB, "vendor_id = %04x\n", vendor_id);
ath6kl_dbg(ATH6KL_DBG_USB, "product_id = %04x\n", product_id);
if (interface->cur_altsetting)
ath6kl_dbg(ATH6KL_DBG_USB, "USB Interface %d\n",
interface->cur_altsetting->desc.bInterfaceNumber);
if (dev->speed == USB_SPEED_HIGH)
ath6kl_dbg(ATH6KL_DBG_USB, "USB 2.0 Host\n");
else
ath6kl_dbg(ATH6KL_DBG_USB, "USB 1.1 Host\n");
ar_usb = ath6kl_usb_create(interface);
if (ar_usb == NULL) {
ret = -ENOMEM;
goto err_usb_put;
}
ar = ath6kl_core_create(&ar_usb->udev->dev);
if (ar == NULL) {
ath6kl_err("Failed to alloc ath6kl core\n");
ret = -ENOMEM;
goto err_usb_destroy;
}
ar->hif_priv = ar_usb;
ar->hif_type = ATH6KL_HIF_TYPE_USB;
ar->hif_ops = &ath6kl_usb_ops;
ar->mbox_info.block_size = 16;
ar->bmi.max_data_size = 252;
ar_usb->ar = ar;
ret = ath6kl_core_init(ar, ATH6KL_HTC_TYPE_PIPE);
if (ret) {
ath6kl_err("Failed to init ath6kl core: %d\n", ret);
goto err_core_free;
}
return ret;
err_core_free:
ath6kl_core_destroy(ar);
err_usb_destroy:
ath6kl_usb_destroy(ar_usb);
err_usb_put:
usb_put_dev(dev);
return ret;
}
static void ath6kl_usb_remove(struct usb_interface *interface)
{
usb_put_dev(interface_to_usbdev(interface));
ath6kl_usb_device_detached(interface);
}
#ifdef CONFIG_PM
static int ath6kl_usb_pm_suspend(struct usb_interface *interface,
pm_message_t message)
{
struct ath6kl_usb *device;
device = usb_get_intfdata(interface);
ath6kl_usb_flush_all(device);
return 0;
}
static int ath6kl_usb_pm_resume(struct usb_interface *interface)
{
struct ath6kl_usb *device;
device = usb_get_intfdata(interface);
ath6kl_usb_post_recv_transfers(&device->pipes[ATH6KL_USB_PIPE_RX_DATA],
ATH6KL_USB_RX_BUFFER_SIZE);
ath6kl_usb_post_recv_transfers(&device->pipes[ATH6KL_USB_PIPE_RX_DATA2],
ATH6KL_USB_RX_BUFFER_SIZE);
return 0;
}
#else
#define ath6kl_usb_pm_suspend NULL
#define ath6kl_usb_pm_resume NULL
#endif
/* table of devices that work with this driver */
static const struct usb_device_id ath6kl_usb_ids[] = {
{USB_DEVICE(0x0cf3, 0x9375)},
{USB_DEVICE(0x0cf3, 0x9374)},
{ /* Terminating entry */ },
};
MODULE_DEVICE_TABLE(usb, ath6kl_usb_ids);
static struct usb_driver ath6kl_usb_driver = {
.name = "ath6kl_usb",
.probe = ath6kl_usb_probe,
.suspend = ath6kl_usb_pm_suspend,
.resume = ath6kl_usb_pm_resume,
.disconnect = ath6kl_usb_remove,
.id_table = ath6kl_usb_ids,
.supports_autosuspend = true,
.disable_hub_initiated_lpm = 1,
};
module_usb_driver(ath6kl_usb_driver);
MODULE_AUTHOR("Atheros Communications, Inc.");
MODULE_DESCRIPTION("Driver support for Atheros AR600x USB devices");
MODULE_LICENSE("Dual BSD/GPL");
MODULE_FIRMWARE(AR6004_HW_1_0_FIRMWARE_FILE);
MODULE_FIRMWARE(AR6004_HW_1_0_BOARD_DATA_FILE);
MODULE_FIRMWARE(AR6004_HW_1_0_DEFAULT_BOARD_DATA_FILE);
MODULE_FIRMWARE(AR6004_HW_1_1_FIRMWARE_FILE);
MODULE_FIRMWARE(AR6004_HW_1_1_BOARD_DATA_FILE);
MODULE_FIRMWARE(AR6004_HW_1_1_DEFAULT_BOARD_DATA_FILE);
MODULE_FIRMWARE(AR6004_HW_1_2_FIRMWARE_FILE);
MODULE_FIRMWARE(AR6004_HW_1_2_BOARD_DATA_FILE);
MODULE_FIRMWARE(AR6004_HW_1_2_DEFAULT_BOARD_DATA_FILE);
MODULE_FIRMWARE(AR6004_HW_1_3_FW_DIR "/" AR6004_HW_1_3_FIRMWARE_FILE);
MODULE_FIRMWARE(AR6004_HW_1_3_BOARD_DATA_FILE);
MODULE_FIRMWARE(AR6004_HW_1_3_DEFAULT_BOARD_DATA_FILE);
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