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linux/drivers/net/wireless/mwifiex/usb.c

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/*
* Marvell Wireless LAN device driver: USB specific handling
*
* Copyright (C) 2012, Marvell International Ltd.
*
* This software file (the "File") is distributed by Marvell International
* Ltd. under the terms of the GNU General Public License Version 2, June 1991
* (the "License"). You may use, redistribute and/or modify this File in
* accordance with the terms and conditions of the License, a copy of which
* is available by writing to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
* worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
*
* THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
* IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
* ARE EXPRESSLY DISCLAIMED. The License provides additional details about
* this warranty disclaimer.
*/
#include "main.h"
#include "usb.h"
#define USB_VERSION "1.0"
static const char usbdriver_name[] = "usb8797";
static u8 user_rmmod;
static struct mwifiex_if_ops usb_ops;
static struct semaphore add_remove_card_sem;
static struct usb_device_id mwifiex_usb_table[] = {
{USB_DEVICE(USB8797_VID, USB8797_PID_1)},
{USB_DEVICE_AND_INTERFACE_INFO(USB8797_VID, USB8797_PID_2,
USB_CLASS_VENDOR_SPEC,
USB_SUBCLASS_VENDOR_SPEC, 0xff)},
{ } /* Terminating entry */
};
MODULE_DEVICE_TABLE(usb, mwifiex_usb_table);
static int mwifiex_usb_submit_rx_urb(struct urb_context *ctx, int size);
/* This function handles received packet. Necessary action is taken based on
* cmd/event/data.
*/
static int mwifiex_usb_recv(struct mwifiex_adapter *adapter,
struct sk_buff *skb, u8 ep)
{
struct device *dev = adapter->dev;
u32 recv_type;
__le32 tmp;
int ret;
if (adapter->hs_activated)
mwifiex_process_hs_config(adapter);
if (skb->len < INTF_HEADER_LEN) {
dev_err(dev, "%s: invalid skb->len\n", __func__);
return -1;
}
switch (ep) {
case MWIFIEX_USB_EP_CMD_EVENT:
dev_dbg(dev, "%s: EP_CMD_EVENT\n", __func__);
skb_copy_from_linear_data(skb, &tmp, INTF_HEADER_LEN);
recv_type = le32_to_cpu(tmp);
skb_pull(skb, INTF_HEADER_LEN);
switch (recv_type) {
case MWIFIEX_USB_TYPE_CMD:
if (skb->len > MWIFIEX_SIZE_OF_CMD_BUFFER) {
dev_err(dev, "CMD: skb->len too large\n");
ret = -1;
goto exit_restore_skb;
} else if (!adapter->curr_cmd) {
dev_dbg(dev, "CMD: no curr_cmd\n");
if (adapter->ps_state == PS_STATE_SLEEP_CFM) {
mwifiex_process_sleep_confirm_resp(
adapter, skb->data,
skb->len);
ret = 0;
goto exit_restore_skb;
}
ret = -1;
goto exit_restore_skb;
}
adapter->curr_cmd->resp_skb = skb;
adapter->cmd_resp_received = true;
break;
case MWIFIEX_USB_TYPE_EVENT:
if (skb->len < sizeof(u32)) {
dev_err(dev, "EVENT: skb->len too small\n");
ret = -1;
goto exit_restore_skb;
}
skb_copy_from_linear_data(skb, &tmp, sizeof(u32));
adapter->event_cause = le32_to_cpu(tmp);
dev_dbg(dev, "event_cause %#x\n", adapter->event_cause);
if (skb->len > MAX_EVENT_SIZE) {
dev_err(dev, "EVENT: event body too large\n");
ret = -1;
goto exit_restore_skb;
}
memcpy(adapter->event_body, skb->data +
MWIFIEX_EVENT_HEADER_LEN, skb->len);
adapter->event_received = true;
adapter->event_skb = skb;
break;
default:
dev_err(dev, "unknown recv_type %#x\n", recv_type);
return -1;
}
break;
case MWIFIEX_USB_EP_DATA:
dev_dbg(dev, "%s: EP_DATA\n", __func__);
if (skb->len > MWIFIEX_RX_DATA_BUF_SIZE) {
dev_err(dev, "DATA: skb->len too large\n");
return -1;
}
skb_queue_tail(&adapter->usb_rx_data_q, skb);
adapter->data_received = true;
break;
default:
dev_err(dev, "%s: unknown endport %#x\n", __func__, ep);
return -1;
}
return -EINPROGRESS;
exit_restore_skb:
/* The buffer will be reused for further cmds/events */
skb_push(skb, INTF_HEADER_LEN);
return ret;
}
static void mwifiex_usb_rx_complete(struct urb *urb)
{
struct urb_context *context = (struct urb_context *)urb->context;
struct mwifiex_adapter *adapter = context->adapter;
struct sk_buff *skb = context->skb;
struct usb_card_rec *card;
int recv_length = urb->actual_length;
int size, status;
if (!adapter || !adapter->card) {
pr_err("mwifiex adapter or card structure is not valid\n");
return;
}
card = (struct usb_card_rec *)adapter->card;
if (card->rx_cmd_ep == context->ep)
atomic_dec(&card->rx_cmd_urb_pending);
else
atomic_dec(&card->rx_data_urb_pending);
if (recv_length) {
if (urb->status || (adapter->surprise_removed)) {
dev_err(adapter->dev,
"URB status is failed: %d\n", urb->status);
/* Do not free skb in case of command ep */
if (card->rx_cmd_ep != context->ep)
dev_kfree_skb_any(skb);
goto setup_for_next;
}
if (skb->len > recv_length)
skb_trim(skb, recv_length);
else
skb_put(skb, recv_length - skb->len);
atomic_inc(&adapter->rx_pending);
status = mwifiex_usb_recv(adapter, skb, context->ep);
dev_dbg(adapter->dev, "info: recv_length=%d, status=%d\n",
recv_length, status);
if (status == -EINPROGRESS) {
queue_work(adapter->workqueue, &adapter->main_work);
/* urb for data_ep is re-submitted now;
* urb for cmd_ep will be re-submitted in callback
* mwifiex_usb_recv_complete
*/
if (card->rx_cmd_ep == context->ep)
return;
} else {
atomic_dec(&adapter->rx_pending);
if (status == -1)
dev_err(adapter->dev,
"received data processing failed!\n");
/* Do not free skb in case of command ep */
if (card->rx_cmd_ep != context->ep)
dev_kfree_skb_any(skb);
}
} else if (urb->status) {
if (!adapter->is_suspended) {
dev_warn(adapter->dev,
"Card is removed: %d\n", urb->status);
adapter->surprise_removed = true;
}
dev_kfree_skb_any(skb);
return;
} else {
/* Do not free skb in case of command ep */
if (card->rx_cmd_ep != context->ep)
dev_kfree_skb_any(skb);
/* fall through setup_for_next */
}
setup_for_next:
if (card->rx_cmd_ep == context->ep)
size = MWIFIEX_RX_CMD_BUF_SIZE;
else
size = MWIFIEX_RX_DATA_BUF_SIZE;
mwifiex_usb_submit_rx_urb(context, size);
return;
}
static void mwifiex_usb_tx_complete(struct urb *urb)
{
struct urb_context *context = (struct urb_context *)(urb->context);
struct mwifiex_adapter *adapter = context->adapter;
struct usb_card_rec *card = adapter->card;
dev_dbg(adapter->dev, "%s: status: %d\n", __func__, urb->status);
if (context->ep == card->tx_cmd_ep) {
dev_dbg(adapter->dev, "%s: CMD\n", __func__);
atomic_dec(&card->tx_cmd_urb_pending);
adapter->cmd_sent = false;
} else {
dev_dbg(adapter->dev, "%s: DATA\n", __func__);
atomic_dec(&card->tx_data_urb_pending);
mwifiex_write_data_complete(adapter, context->skb,
urb->status ? -1 : 0);
}
queue_work(adapter->workqueue, &adapter->main_work);
return;
}
static int mwifiex_usb_submit_rx_urb(struct urb_context *ctx, int size)
{
struct mwifiex_adapter *adapter = ctx->adapter;
struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
if (card->rx_cmd_ep != ctx->ep) {
ctx->skb = dev_alloc_skb(size);
if (!ctx->skb) {
dev_err(adapter->dev,
"%s: dev_alloc_skb failed\n", __func__);
return -ENOMEM;
}
}
usb_fill_bulk_urb(ctx->urb, card->udev,
usb_rcvbulkpipe(card->udev, ctx->ep), ctx->skb->data,
size, mwifiex_usb_rx_complete, (void *)ctx);
if (card->rx_cmd_ep == ctx->ep)
atomic_inc(&card->rx_cmd_urb_pending);
else
atomic_inc(&card->rx_data_urb_pending);
if (usb_submit_urb(ctx->urb, GFP_ATOMIC)) {
dev_err(adapter->dev, "usb_submit_urb failed\n");
dev_kfree_skb_any(ctx->skb);
ctx->skb = NULL;
if (card->rx_cmd_ep == ctx->ep)
atomic_dec(&card->rx_cmd_urb_pending);
else
atomic_dec(&card->rx_data_urb_pending);
return -1;
}
return 0;
}
static void mwifiex_usb_free(struct usb_card_rec *card)
{
int i;
if (atomic_read(&card->rx_cmd_urb_pending) && card->rx_cmd.urb)
usb_kill_urb(card->rx_cmd.urb);
usb_free_urb(card->rx_cmd.urb);
card->rx_cmd.urb = NULL;
if (atomic_read(&card->rx_data_urb_pending))
for (i = 0; i < MWIFIEX_RX_DATA_URB; i++)
if (card->rx_data_list[i].urb)
usb_kill_urb(card->rx_data_list[i].urb);
for (i = 0; i < MWIFIEX_RX_DATA_URB; i++) {
usb_free_urb(card->rx_data_list[i].urb);
card->rx_data_list[i].urb = NULL;
}
for (i = 0; i < MWIFIEX_TX_DATA_URB; i++) {
usb_free_urb(card->tx_data_list[i].urb);
card->tx_data_list[i].urb = NULL;
}
usb_free_urb(card->tx_cmd.urb);
card->tx_cmd.urb = NULL;
return;
}
/* This function probes an mwifiex device and registers it. It allocates
* the card structure, initiates the device registration and initialization
* procedure by adding a logical interface.
*/
static int mwifiex_usb_probe(struct usb_interface *intf,
const struct usb_device_id *id)
{
struct usb_device *udev = interface_to_usbdev(intf);
struct usb_host_interface *iface_desc = intf->cur_altsetting;
struct usb_endpoint_descriptor *epd;
int ret, i;
struct usb_card_rec *card;
u16 id_vendor, id_product, bcd_device, bcd_usb;
card = kzalloc(sizeof(struct usb_card_rec), GFP_KERNEL);
if (!card)
return -ENOMEM;
id_vendor = le16_to_cpu(udev->descriptor.idVendor);
id_product = le16_to_cpu(udev->descriptor.idProduct);
bcd_device = le16_to_cpu(udev->descriptor.bcdDevice);
bcd_usb = le16_to_cpu(udev->descriptor.bcdUSB);
pr_debug("info: VID/PID = %X/%X, Boot2 version = %X\n",
id_vendor, id_product, bcd_device);
/* PID_1 is used for firmware downloading only */
if (id_product == USB8797_PID_1)
card->usb_boot_state = USB8797_FW_DNLD;
else
card->usb_boot_state = USB8797_FW_READY;
card->udev = udev;
card->intf = intf;
pr_debug("info: bcdUSB=%#x Device Class=%#x SubClass=%#x Protocl=%#x\n",
udev->descriptor.bcdUSB, udev->descriptor.bDeviceClass,
udev->descriptor.bDeviceSubClass,
udev->descriptor.bDeviceProtocol);
for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
epd = &iface_desc->endpoint[i].desc;
if (usb_endpoint_dir_in(epd) &&
usb_endpoint_num(epd) == MWIFIEX_USB_EP_CMD_EVENT &&
usb_endpoint_xfer_bulk(epd)) {
pr_debug("info: bulk IN: max pkt size: %d, addr: %d\n",
le16_to_cpu(epd->wMaxPacketSize),
epd->bEndpointAddress);
card->rx_cmd_ep = usb_endpoint_num(epd);
atomic_set(&card->rx_cmd_urb_pending, 0);
}
if (usb_endpoint_dir_in(epd) &&
usb_endpoint_num(epd) == MWIFIEX_USB_EP_DATA &&
usb_endpoint_xfer_bulk(epd)) {
pr_debug("info: bulk IN: max pkt size: %d, addr: %d\n",
le16_to_cpu(epd->wMaxPacketSize),
epd->bEndpointAddress);
card->rx_data_ep = usb_endpoint_num(epd);
atomic_set(&card->rx_data_urb_pending, 0);
}
if (usb_endpoint_dir_out(epd) &&
usb_endpoint_num(epd) == MWIFIEX_USB_EP_DATA &&
usb_endpoint_xfer_bulk(epd)) {
pr_debug("info: bulk OUT: max pkt size: %d, addr: %d\n",
le16_to_cpu(epd->wMaxPacketSize),
epd->bEndpointAddress);
card->tx_data_ep = usb_endpoint_num(epd);
atomic_set(&card->tx_data_urb_pending, 0);
}
if (usb_endpoint_dir_out(epd) &&
usb_endpoint_num(epd) == MWIFIEX_USB_EP_CMD_EVENT &&
usb_endpoint_xfer_bulk(epd)) {
pr_debug("info: bulk OUT: max pkt size: %d, addr: %d\n",
le16_to_cpu(epd->wMaxPacketSize),
epd->bEndpointAddress);
card->tx_cmd_ep = usb_endpoint_num(epd);
atomic_set(&card->tx_cmd_urb_pending, 0);
card->bulk_out_maxpktsize =
le16_to_cpu(epd->wMaxPacketSize);
}
}
usb_set_intfdata(intf, card);
ret = mwifiex_add_card(card, &add_remove_card_sem, &usb_ops,
MWIFIEX_USB);
if (ret) {
pr_err("%s: mwifiex_add_card failed: %d\n", __func__, ret);
usb_reset_device(udev);
kfree(card);
return ret;
}
usb_get_dev(udev);
return 0;
}
/* Kernel needs to suspend all functions separately. Therefore all
* registered functions must have drivers with suspend and resume
* methods. Failing that the kernel simply removes the whole card.
*
* If already not suspended, this function allocates and sends a
* 'host sleep activate' request to the firmware and turns off the traffic.
*/
static int mwifiex_usb_suspend(struct usb_interface *intf, pm_message_t message)
{
struct usb_card_rec *card = usb_get_intfdata(intf);
struct mwifiex_adapter *adapter;
int i;
if (!card || !card->adapter) {
pr_err("%s: card or card->adapter is NULL\n", __func__);
return 0;
}
adapter = card->adapter;
if (unlikely(adapter->is_suspended))
dev_warn(adapter->dev, "Device already suspended\n");
mwifiex_enable_hs(adapter);
/* 'is_suspended' flag indicates device is suspended.
* It must be set here before the usb_kill_urb() calls. Reason
* is in the complete handlers, urb->status(= -ENOENT) and
* this flag is used in combination to distinguish between a
* 'suspended' state and a 'disconnect' one.
*/
adapter->is_suspended = true;
for (i = 0; i < adapter->priv_num; i++)
netif_carrier_off(adapter->priv[i]->netdev);
if (atomic_read(&card->rx_cmd_urb_pending) && card->rx_cmd.urb)
usb_kill_urb(card->rx_cmd.urb);
if (atomic_read(&card->rx_data_urb_pending))
for (i = 0; i < MWIFIEX_RX_DATA_URB; i++)
if (card->rx_data_list[i].urb)
usb_kill_urb(card->rx_data_list[i].urb);
for (i = 0; i < MWIFIEX_TX_DATA_URB; i++)
if (card->tx_data_list[i].urb)
usb_kill_urb(card->tx_data_list[i].urb);
if (card->tx_cmd.urb)
usb_kill_urb(card->tx_cmd.urb);
return 0;
}
/* Kernel needs to suspend all functions separately. Therefore all
* registered functions must have drivers with suspend and resume
* methods. Failing that the kernel simply removes the whole card.
*
* If already not resumed, this function turns on the traffic and
* sends a 'host sleep cancel' request to the firmware.
*/
static int mwifiex_usb_resume(struct usb_interface *intf)
{
struct usb_card_rec *card = usb_get_intfdata(intf);
struct mwifiex_adapter *adapter;
int i;
if (!card || !card->adapter) {
pr_err("%s: card or card->adapter is NULL\n", __func__);
return 0;
}
adapter = card->adapter;
if (unlikely(!adapter->is_suspended)) {
dev_warn(adapter->dev, "Device already resumed\n");
return 0;
}
/* Indicate device resumed. The netdev queue will be resumed only
* after the urbs have been re-submitted
*/
adapter->is_suspended = false;
if (!atomic_read(&card->rx_data_urb_pending))
for (i = 0; i < MWIFIEX_RX_DATA_URB; i++)
mwifiex_usb_submit_rx_urb(&card->rx_data_list[i],
MWIFIEX_RX_DATA_BUF_SIZE);
if (!atomic_read(&card->rx_cmd_urb_pending)) {
card->rx_cmd.skb = dev_alloc_skb(MWIFIEX_RX_CMD_BUF_SIZE);
if (card->rx_cmd.skb)
mwifiex_usb_submit_rx_urb(&card->rx_cmd,
MWIFIEX_RX_CMD_BUF_SIZE);
}
for (i = 0; i < adapter->priv_num; i++)
if (adapter->priv[i]->media_connected)
netif_carrier_on(adapter->priv[i]->netdev);
/* Disable Host Sleep */
if (adapter->hs_activated)
mwifiex_cancel_hs(mwifiex_get_priv(adapter,
MWIFIEX_BSS_ROLE_ANY),
MWIFIEX_ASYNC_CMD);
#ifdef CONFIG_PM
/* Resume handler may be called due to remote wakeup,
* force to exit suspend anyway
*/
usb_disable_autosuspend(card->udev);
#endif /* CONFIG_PM */
return 0;
}
static void mwifiex_usb_disconnect(struct usb_interface *intf)
{
struct usb_card_rec *card = usb_get_intfdata(intf);
struct mwifiex_adapter *adapter;
int i;
if (!card || !card->adapter) {
pr_err("%s: card or card->adapter is NULL\n", __func__);
return;
}
adapter = card->adapter;
if (!adapter->priv_num)
return;
/* In case driver is removed when asynchronous FW downloading is
* in progress
*/
wait_for_completion(&adapter->fw_load);
if (user_rmmod) {
#ifdef CONFIG_PM
if (adapter->is_suspended)
mwifiex_usb_resume(intf);
#endif
for (i = 0; i < adapter->priv_num; i++)
if ((GET_BSS_ROLE(adapter->priv[i]) ==
MWIFIEX_BSS_ROLE_STA) &&
adapter->priv[i]->media_connected)
mwifiex_deauthenticate(adapter->priv[i], NULL);
mwifiex_init_shutdown_fw(mwifiex_get_priv(adapter,
MWIFIEX_BSS_ROLE_ANY),
MWIFIEX_FUNC_SHUTDOWN);
}
mwifiex_usb_free(card);
dev_dbg(adapter->dev, "%s: removing card\n", __func__);
mwifiex_remove_card(adapter, &add_remove_card_sem);
usb_set_intfdata(intf, NULL);
usb_put_dev(interface_to_usbdev(intf));
kfree(card);
return;
}
static struct usb_driver mwifiex_usb_driver = {
.name = usbdriver_name,
.probe = mwifiex_usb_probe,
.disconnect = mwifiex_usb_disconnect,
.id_table = mwifiex_usb_table,
.suspend = mwifiex_usb_suspend,
.resume = mwifiex_usb_resume,
.supports_autosuspend = 1,
};
static int mwifiex_usb_tx_init(struct mwifiex_adapter *adapter)
{
struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
int i;
card->tx_cmd.adapter = adapter;
card->tx_cmd.ep = card->tx_cmd_ep;
card->tx_cmd.urb = usb_alloc_urb(0, GFP_KERNEL);
if (!card->tx_cmd.urb) {
dev_err(adapter->dev, "tx_cmd.urb allocation failed\n");
return -ENOMEM;
}
card->tx_data_ix = 0;
for (i = 0; i < MWIFIEX_TX_DATA_URB; i++) {
card->tx_data_list[i].adapter = adapter;
card->tx_data_list[i].ep = card->tx_data_ep;
card->tx_data_list[i].urb = usb_alloc_urb(0, GFP_KERNEL);
if (!card->tx_data_list[i].urb) {
dev_err(adapter->dev,
"tx_data_list[] urb allocation failed\n");
return -ENOMEM;
}
}
return 0;
}
static int mwifiex_usb_rx_init(struct mwifiex_adapter *adapter)
{
struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
int i;
card->rx_cmd.adapter = adapter;
card->rx_cmd.ep = card->rx_cmd_ep;
card->rx_cmd.urb = usb_alloc_urb(0, GFP_KERNEL);
if (!card->rx_cmd.urb) {
dev_err(adapter->dev, "rx_cmd.urb allocation failed\n");
return -ENOMEM;
}
card->rx_cmd.skb = dev_alloc_skb(MWIFIEX_RX_CMD_BUF_SIZE);
if (!card->rx_cmd.skb) {
dev_err(adapter->dev, "rx_cmd.skb allocation failed\n");
return -ENOMEM;
}
if (mwifiex_usb_submit_rx_urb(&card->rx_cmd, MWIFIEX_RX_CMD_BUF_SIZE))
return -1;
for (i = 0; i < MWIFIEX_RX_DATA_URB; i++) {
card->rx_data_list[i].adapter = adapter;
card->rx_data_list[i].ep = card->rx_data_ep;
card->rx_data_list[i].urb = usb_alloc_urb(0, GFP_KERNEL);
if (!card->rx_data_list[i].urb) {
dev_err(adapter->dev,
"rx_data_list[] urb allocation failed\n");
return -1;
}
if (mwifiex_usb_submit_rx_urb(&card->rx_data_list[i],
MWIFIEX_RX_DATA_BUF_SIZE))
return -1;
}
return 0;
}
static int mwifiex_write_data_sync(struct mwifiex_adapter *adapter, u8 *pbuf,
u32 *len, u8 ep, u32 timeout)
{
struct usb_card_rec *card = adapter->card;
int actual_length, ret;
if (!(*len % card->bulk_out_maxpktsize))
(*len)++;
/* Send the data block */
ret = usb_bulk_msg(card->udev, usb_sndbulkpipe(card->udev, ep), pbuf,
*len, &actual_length, timeout);
if (ret) {
dev_err(adapter->dev, "usb_bulk_msg for tx failed: %d\n", ret);
ret = -1;
}
*len = actual_length;
return ret;
}
static int mwifiex_read_data_sync(struct mwifiex_adapter *adapter, u8 *pbuf,
u32 *len, u8 ep, u32 timeout)
{
struct usb_card_rec *card = adapter->card;
int actual_length, ret;
/* Receive the data response */
ret = usb_bulk_msg(card->udev, usb_rcvbulkpipe(card->udev, ep), pbuf,
*len, &actual_length, timeout);
if (ret) {
dev_err(adapter->dev, "usb_bulk_msg for rx failed: %d\n", ret);
ret = -1;
}
*len = actual_length;
return ret;
}
/* This function write a command/data packet to card. */
static int mwifiex_usb_host_to_card(struct mwifiex_adapter *adapter, u8 ep,
struct sk_buff *skb,
struct mwifiex_tx_param *tx_param)
{
struct usb_card_rec *card = adapter->card;
struct urb_context *context;
u8 *data = (u8 *)skb->data;
struct urb *tx_urb;
if (adapter->is_suspended) {
dev_err(adapter->dev,
"%s: not allowed while suspended\n", __func__);
return -1;
}
if (adapter->surprise_removed) {
dev_err(adapter->dev, "%s: device removed\n", __func__);
return -1;
}
if (ep == card->tx_data_ep &&
atomic_read(&card->tx_data_urb_pending) >= MWIFIEX_TX_DATA_URB) {
return -EBUSY;
}
dev_dbg(adapter->dev, "%s: ep=%d\n", __func__, ep);
if (ep == card->tx_cmd_ep) {
context = &card->tx_cmd;
} else {
if (card->tx_data_ix >= MWIFIEX_TX_DATA_URB)
card->tx_data_ix = 0;
context = &card->tx_data_list[card->tx_data_ix++];
}
context->adapter = adapter;
context->ep = ep;
context->skb = skb;
tx_urb = context->urb;
usb_fill_bulk_urb(tx_urb, card->udev, usb_sndbulkpipe(card->udev, ep),
data, skb->len, mwifiex_usb_tx_complete,
(void *)context);
tx_urb->transfer_flags |= URB_ZERO_PACKET;
if (ep == card->tx_cmd_ep)
atomic_inc(&card->tx_cmd_urb_pending);
else
atomic_inc(&card->tx_data_urb_pending);
if (usb_submit_urb(tx_urb, GFP_ATOMIC)) {
dev_err(adapter->dev, "%s: usb_submit_urb failed\n", __func__);
if (ep == card->tx_cmd_ep) {
atomic_dec(&card->tx_cmd_urb_pending);
} else {
atomic_dec(&card->tx_data_urb_pending);
if (card->tx_data_ix)
card->tx_data_ix--;
else
card->tx_data_ix = MWIFIEX_TX_DATA_URB;
}
return -1;
} else {
if (ep == card->tx_data_ep &&
atomic_read(&card->tx_data_urb_pending) ==
MWIFIEX_TX_DATA_URB)
return -ENOSR;
}
return -EINPROGRESS;
}
/* This function register usb device and initialize parameter. */
static int mwifiex_register_dev(struct mwifiex_adapter *adapter)
{
struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
card->adapter = adapter;
adapter->dev = &card->udev->dev;
strcpy(adapter->fw_name, USB8797_DEFAULT_FW_NAME);
return 0;
}
/* This function reads one block of firmware data. */
static int mwifiex_get_fw_data(struct mwifiex_adapter *adapter,
u32 offset, u32 len, u8 *buf)
{
if (!buf || !len)
return -1;
if (offset + len > adapter->firmware->size)
return -1;
memcpy(buf, adapter->firmware->data + offset, len);
return 0;
}
static int mwifiex_prog_fw_w_helper(struct mwifiex_adapter *adapter,
struct mwifiex_fw_image *fw)
{
int ret = 0;
u8 *firmware = fw->fw_buf, *recv_buff;
u32 retries = USB8797_FW_MAX_RETRY, dlen;
u32 fw_seqnum = 0, tlen = 0, dnld_cmd = 0;
struct fw_data *fwdata;
struct fw_sync_header sync_fw;
u8 check_winner = 1;
if (!firmware) {
dev_err(adapter->dev,
"No firmware image found! Terminating download\n");
ret = -1;
goto fw_exit;
}
/* Allocate memory for transmit */
fwdata = kzalloc(FW_DNLD_TX_BUF_SIZE, GFP_KERNEL);
if (!fwdata)
goto fw_exit;
/* Allocate memory for receive */
recv_buff = kzalloc(FW_DNLD_RX_BUF_SIZE, GFP_KERNEL);
if (!recv_buff)
goto cleanup;
do {
/* Send pseudo data to check winner status first */
if (check_winner) {
memset(&fwdata->fw_hdr, 0, sizeof(struct fw_header));
dlen = 0;
} else {
/* copy the header of the fw_data to get the length */
if (firmware)
memcpy(&fwdata->fw_hdr, &firmware[tlen],
sizeof(struct fw_header));
else
mwifiex_get_fw_data(adapter, tlen,
sizeof(struct fw_header),
(u8 *)&fwdata->fw_hdr);
dlen = le32_to_cpu(fwdata->fw_hdr.data_len);
dnld_cmd = le32_to_cpu(fwdata->fw_hdr.dnld_cmd);
tlen += sizeof(struct fw_header);
if (firmware)
memcpy(fwdata->data, &firmware[tlen], dlen);
else
mwifiex_get_fw_data(adapter, tlen, dlen,
(u8 *)fwdata->data);
fwdata->seq_num = cpu_to_le32(fw_seqnum);
tlen += dlen;
}
/* If the send/receive fails or CRC occurs then retry */
while (retries--) {
u8 *buf = (u8 *)fwdata;
u32 len = FW_DATA_XMIT_SIZE;
/* send the firmware block */
ret = mwifiex_write_data_sync(adapter, buf, &len,
MWIFIEX_USB_EP_CMD_EVENT,
MWIFIEX_USB_TIMEOUT);
if (ret) {
dev_err(adapter->dev,
"write_data_sync: failed: %d\n", ret);
continue;
}
buf = recv_buff;
len = FW_DNLD_RX_BUF_SIZE;
/* Receive the firmware block response */
ret = mwifiex_read_data_sync(adapter, buf, &len,
MWIFIEX_USB_EP_CMD_EVENT,
MWIFIEX_USB_TIMEOUT);
if (ret) {
dev_err(adapter->dev,
"read_data_sync: failed: %d\n", ret);
continue;
}
memcpy(&sync_fw, recv_buff,
sizeof(struct fw_sync_header));
/* check 1st firmware block resp for highest bit set */
if (check_winner) {
if (le32_to_cpu(sync_fw.cmd) & 0x80000000) {
dev_warn(adapter->dev,
"USB is not the winner %#x\n",
sync_fw.cmd);
/* returning success */
ret = 0;
goto cleanup;
}
dev_dbg(adapter->dev,
"USB is the winner, start to download FW\n");
check_winner = 0;
break;
}
/* check the firmware block response for CRC errors */
if (sync_fw.cmd) {
dev_err(adapter->dev,
"FW received block with CRC %#x\n",
sync_fw.cmd);
ret = -1;
continue;
}
retries = USB8797_FW_MAX_RETRY;
break;
}
fw_seqnum++;
} while ((dnld_cmd != FW_HAS_LAST_BLOCK) && retries);
cleanup:
dev_dbg(adapter->dev, "%s: %d bytes downloaded\n", __func__, tlen);
kfree(recv_buff);
kfree(fwdata);
if (retries)
ret = 0;
fw_exit:
return ret;
}
static int mwifiex_usb_dnld_fw(struct mwifiex_adapter *adapter,
struct mwifiex_fw_image *fw)
{
int ret;
struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
if (card->usb_boot_state == USB8797_FW_DNLD) {
ret = mwifiex_prog_fw_w_helper(adapter, fw);
if (ret)
return -1;
/* Boot state changes after successful firmware download */
if (card->usb_boot_state == USB8797_FW_DNLD)
return -1;
}
ret = mwifiex_usb_rx_init(adapter);
if (!ret)
ret = mwifiex_usb_tx_init(adapter);
return ret;
}
static void mwifiex_submit_rx_urb(struct mwifiex_adapter *adapter, u8 ep)
{
struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
skb_push(card->rx_cmd.skb, INTF_HEADER_LEN);
if ((ep == card->rx_cmd_ep) &&
(!atomic_read(&card->rx_cmd_urb_pending)))
mwifiex_usb_submit_rx_urb(&card->rx_cmd,
MWIFIEX_RX_CMD_BUF_SIZE);
return;
}
static int mwifiex_usb_cmd_event_complete(struct mwifiex_adapter *adapter,
struct sk_buff *skb)
{
atomic_dec(&adapter->rx_pending);
mwifiex_submit_rx_urb(adapter, MWIFIEX_USB_EP_CMD_EVENT);
return 0;
}
static int mwifiex_usb_data_complete(struct mwifiex_adapter *adapter,
struct sk_buff *skb)
{
atomic_dec(&adapter->rx_pending);
dev_kfree_skb_any(skb);
return 0;
}
/* This function wakes up the card. */
static int mwifiex_pm_wakeup_card(struct mwifiex_adapter *adapter)
{
/* Simulation of HS_AWAKE event */
adapter->pm_wakeup_fw_try = false;
adapter->pm_wakeup_card_req = false;
adapter->ps_state = PS_STATE_AWAKE;
return 0;
}
static struct mwifiex_if_ops usb_ops = {
.register_dev = mwifiex_register_dev,
.wakeup = mwifiex_pm_wakeup_card,
.wakeup_complete = mwifiex_pm_wakeup_card_complete,
/* USB specific */
.dnld_fw = mwifiex_usb_dnld_fw,
.cmdrsp_complete = mwifiex_usb_cmd_event_complete,
.event_complete = mwifiex_usb_cmd_event_complete,
.data_complete = mwifiex_usb_data_complete,
.host_to_card = mwifiex_usb_host_to_card,
};
/* This function initializes the USB driver module.
*
* This initiates the semaphore and registers the device with
* USB bus.
*/
static int mwifiex_usb_init_module(void)
{
int ret;
pr_debug("Marvell USB8797 Driver\n");
sema_init(&add_remove_card_sem, 1);
ret = usb_register(&mwifiex_usb_driver);
if (ret)
pr_err("Driver register failed!\n");
else
pr_debug("info: Driver registered successfully!\n");
return ret;
}
/* This function cleans up the USB driver.
*
* The following major steps are followed in .disconnect for cleanup:
* - Resume the device if its suspended
* - Disconnect the device if connected
* - Shutdown the firmware
* - Unregister the device from USB bus.
*/
static void mwifiex_usb_cleanup_module(void)
{
if (!down_interruptible(&add_remove_card_sem))
up(&add_remove_card_sem);
/* set the flag as user is removing this module */
user_rmmod = 1;
usb_deregister(&mwifiex_usb_driver);
}
module_init(mwifiex_usb_init_module);
module_exit(mwifiex_usb_cleanup_module);
MODULE_AUTHOR("Marvell International Ltd.");
MODULE_DESCRIPTION("Marvell WiFi-Ex USB Driver version" USB_VERSION);
MODULE_VERSION(USB_VERSION);
MODULE_LICENSE("GPL v2");
MODULE_FIRMWARE("mrvl/usb8797_uapsta.bin");
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