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linux/drivers/net/wireless/marvell/mwifiex/usb.c
Rajat Jain 2e02b58142 mwifiex: Allow mwifiex early access to device structure 
Today all the interface drivers (usb/pcie/sdio) assign the
adapter->dev in the register_dev() callback, although they
have this piece of info well before hand.

This patch makes the device structure available for mwifiex
right at the beginning, so that it can be used for early
initialization if needed.

This is needed for subsequent patches in this patchset that
intend to unify and consolidate some of the code that would
otherwise have to be duplicated among the interface drivers
(sdio, pcie, usb).

Signed-off-by: Rajat Jain <rajatja@google.com>
Signed-off-by: Amitkumar Karwar <akarwar@marvell.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
2016-11-19 09:13:11 +02:00

1253 lines
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/*
* Marvell Wireless LAN device driver: USB specific handling
*
* Copyright (C) 2012-2014, 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 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[] = {
/* 8766 */
{USB_DEVICE(USB8XXX_VID, USB8766_PID_1)},
{USB_DEVICE_AND_INTERFACE_INFO(USB8XXX_VID, USB8766_PID_2,
USB_CLASS_VENDOR_SPEC,
USB_SUBCLASS_VENDOR_SPEC, 0xff)},
/* 8797 */
{USB_DEVICE(USB8XXX_VID, USB8797_PID_1)},
{USB_DEVICE_AND_INTERFACE_INFO(USB8XXX_VID, USB8797_PID_2,
USB_CLASS_VENDOR_SPEC,
USB_SUBCLASS_VENDOR_SPEC, 0xff)},
/* 8801 */
{USB_DEVICE(USB8XXX_VID, USB8801_PID_1)},
{USB_DEVICE_AND_INTERFACE_INFO(USB8XXX_VID, USB8801_PID_2,
USB_CLASS_VENDOR_SPEC,
USB_SUBCLASS_VENDOR_SPEC, 0xff)},
/* 8997 */
{USB_DEVICE(USB8XXX_VID, USB8997_PID_1)},
{USB_DEVICE_AND_INTERFACE_INFO(USB8XXX_VID, USB8997_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)
{
u32 recv_type;
__le32 tmp;
int ret;
if (adapter->hs_activated)
mwifiex_process_hs_config(adapter);
if (skb->len < INTF_HEADER_LEN) {
mwifiex_dbg(adapter, ERROR,
"%s: invalid skb->len\n", __func__);
return -1;
}
switch (ep) {
case MWIFIEX_USB_EP_CMD_EVENT:
mwifiex_dbg(adapter, EVENT,
"%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) {
mwifiex_dbg(adapter, ERROR,
"CMD: skb->len too large\n");
ret = -1;
goto exit_restore_skb;
} else if (!adapter->curr_cmd) {
mwifiex_dbg(adapter, WARN, "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)) {
mwifiex_dbg(adapter, ERROR,
"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);
mwifiex_dbg(adapter, EVENT,
"event_cause %#x\n", adapter->event_cause);
if (skb->len > MAX_EVENT_SIZE) {
mwifiex_dbg(adapter, ERROR,
"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:
mwifiex_dbg(adapter, ERROR,
"unknown recv_type %#x\n", recv_type);
return -1;
}
break;
case MWIFIEX_USB_EP_DATA:
mwifiex_dbg(adapter, DATA, "%s: EP_DATA\n", __func__);
if (skb->len > MWIFIEX_RX_DATA_BUF_SIZE) {
mwifiex_dbg(adapter, ERROR,
"DATA: skb->len too large\n");
return -1;
}
skb_queue_tail(&adapter->rx_data_q, skb);
adapter->data_received = true;
atomic_inc(&adapter->rx_pending);
break;
default:
mwifiex_dbg(adapter, ERROR,
"%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)) {
mwifiex_dbg(adapter, ERROR,
"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);
status = mwifiex_usb_recv(adapter, skb, context->ep);
mwifiex_dbg(adapter, INFO,
"info: recv_length=%d, status=%d\n",
recv_length, status);
if (status == -EINPROGRESS) {
mwifiex_queue_main_work(adapter);
/* 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 {
if (status == -1)
mwifiex_dbg(adapter, ERROR,
"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) {
mwifiex_dbg(adapter, FATAL,
"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;
if (card->rx_cmd_ep == context->ep) {
mwifiex_usb_submit_rx_urb(context, size);
} else {
if (atomic_read(&adapter->rx_pending) <= HIGH_RX_PENDING) {
mwifiex_usb_submit_rx_urb(context, size);
} else {
context->skb = NULL;
}
}
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;
struct usb_tx_data_port *port;
int i;
mwifiex_dbg(adapter, INFO,
"%s: status: %d\n", __func__, urb->status);
if (context->ep == card->tx_cmd_ep) {
mwifiex_dbg(adapter, CMD,
"%s: CMD\n", __func__);
atomic_dec(&card->tx_cmd_urb_pending);
adapter->cmd_sent = false;
} else {
mwifiex_dbg(adapter, DATA,
"%s: DATA\n", __func__);
mwifiex_write_data_complete(adapter, context->skb, 0,
urb->status ? -1 : 0);
for (i = 0; i < MWIFIEX_TX_DATA_PORT; i++) {
port = &card->port[i];
if (context->ep == port->tx_data_ep) {
atomic_dec(&port->tx_data_urb_pending);
port->block_status = false;
break;
}
}
adapter->data_sent = false;
}
if (card->mc_resync_flag)
mwifiex_multi_chan_resync(adapter);
mwifiex_queue_main_work(adapter);
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) {
mwifiex_dbg(adapter, ERROR,
"%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)) {
mwifiex_dbg(adapter, ERROR, "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)
{
struct usb_tx_data_port *port;
int i, j;
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_PORT; i++) {
port = &card->port[i];
for (j = 0; j < MWIFIEX_TX_DATA_URB; j++) {
usb_free_urb(port->tx_data_list[j].urb);
port->tx_data_list[j].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 = devm_kzalloc(&intf->dev, sizeof(*card), 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 */
switch (id_product) {
case USB8766_PID_1:
case USB8797_PID_1:
case USB8801_PID_1:
case USB8997_PID_1:
card->usb_boot_state = USB8XXX_FW_DNLD;
break;
case USB8766_PID_2:
case USB8797_PID_2:
case USB8801_PID_2:
case USB8997_PID_2:
card->usb_boot_state = USB8XXX_FW_READY;
break;
default:
pr_warn("unknown id_product %#x\n", id_product);
card->usb_boot_state = USB8XXX_FW_DNLD;
break;
}
card->udev = udev;
card->intf = intf;
pr_debug("info: bcdUSB=%#x Device Class=%#x SubClass=%#x Protocol=%#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->port[0].tx_data_ep = usb_endpoint_num(epd);
atomic_set(&card->port[0].tx_data_urb_pending, 0);
}
if (usb_endpoint_dir_out(epd) &&
usb_endpoint_num(epd) == MWIFIEX_USB_EP_DATA_CH2 &&
usb_endpoint_xfer_bulk(epd)) {
pr_debug("info: bulk OUT chan2:\t"
"max pkt size: %d, addr: %d\n",
le16_to_cpu(epd->wMaxPacketSize),
epd->bEndpointAddress);
card->port[1].tx_data_ep = usb_endpoint_num(epd);
atomic_set(&card->port[1].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, &card->udev->dev);
if (ret) {
pr_err("%s: mwifiex_add_card failed: %d\n", __func__, ret);
usb_reset_device(udev);
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;
struct usb_tx_data_port *port;
int i, j;
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))
mwifiex_dbg(adapter, WARN,
"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;
adapter->hs_enabling = false;
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_PORT; i++) {
port = &card->port[i];
for (j = 0; j < MWIFIEX_TX_DATA_URB; j++) {
if (port->tx_data_list[j].urb)
usb_kill_urb(port->tx_data_list[j].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)) {
mwifiex_dbg(adapter, WARN,
"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);
}
/* Disable Host Sleep */
if (adapter->hs_activated)
mwifiex_cancel_hs(mwifiex_get_priv(adapter,
MWIFIEX_BSS_ROLE_ANY),
MWIFIEX_ASYNC_CMD);
return 0;
}
static void mwifiex_usb_disconnect(struct usb_interface *intf)
{
struct usb_card_rec *card = usb_get_intfdata(intf);
struct mwifiex_adapter *adapter;
if (!card || !card->adapter) {
pr_err("%s: card or card->adapter is NULL\n", __func__);
return;
}
adapter = card->adapter;
if (!adapter->priv_num)
return;
if (user_rmmod && !adapter->mfg_mode) {
#ifdef CONFIG_PM
if (adapter->is_suspended)
mwifiex_usb_resume(intf);
#endif
mwifiex_deauthenticate_all(adapter);
mwifiex_init_shutdown_fw(mwifiex_get_priv(adapter,
MWIFIEX_BSS_ROLE_ANY),
MWIFIEX_FUNC_SHUTDOWN);
}
mwifiex_usb_free(card);
mwifiex_dbg(adapter, FATAL,
"%s: removing card\n", __func__);
mwifiex_remove_card(adapter, &add_remove_card_sem);
usb_put_dev(interface_to_usbdev(intf));
}
static struct usb_driver mwifiex_usb_driver = {
.name = "mwifiex_usb",
.probe = mwifiex_usb_probe,
.disconnect = mwifiex_usb_disconnect,
.id_table = mwifiex_usb_table,
.suspend = mwifiex_usb_suspend,
.resume = mwifiex_usb_resume,
.soft_unbind = 1,
};
static int mwifiex_usb_tx_init(struct mwifiex_adapter *adapter)
{
struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
struct usb_tx_data_port *port;
int i, j;
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)
return -ENOMEM;
for (i = 0; i < MWIFIEX_TX_DATA_PORT; i++) {
port = &card->port[i];
if (!port->tx_data_ep)
continue;
port->tx_data_ix = 0;
if (port->tx_data_ep == MWIFIEX_USB_EP_DATA)
port->block_status = false;
else
port->block_status = true;
for (j = 0; j < MWIFIEX_TX_DATA_URB; j++) {
port->tx_data_list[j].adapter = adapter;
port->tx_data_list[j].ep = port->tx_data_ep;
port->tx_data_list[j].urb =
usb_alloc_urb(0, GFP_KERNEL);
if (!port->tx_data_list[j].urb)
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)
return -ENOMEM;
card->rx_cmd.skb = dev_alloc_skb(MWIFIEX_RX_CMD_BUF_SIZE);
if (!card->rx_cmd.skb)
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)
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) {
mwifiex_dbg(adapter, ERROR,
"usb_bulk_msg for tx failed: %d\n", ret);
return ret;
}
*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) {
mwifiex_dbg(adapter, ERROR,
"usb_bulk_msg for rx failed: %d\n", ret);
return ret;
}
*len = actual_length;
return ret;
}
static void mwifiex_usb_port_resync(struct mwifiex_adapter *adapter)
{
struct usb_card_rec *card = adapter->card;
u8 active_port = MWIFIEX_USB_EP_DATA;
struct mwifiex_private *priv = NULL;
int i;
if (adapter->usb_mc_status) {
for (i = 0; i < adapter->priv_num; i++) {
priv = adapter->priv[i];
if (!priv)
continue;
if ((priv->bss_role == MWIFIEX_BSS_ROLE_UAP &&
!priv->bss_started) ||
(priv->bss_role == MWIFIEX_BSS_ROLE_STA &&
!priv->media_connected))
priv->usb_port = MWIFIEX_USB_EP_DATA;
}
for (i = 0; i < MWIFIEX_TX_DATA_PORT; i++)
card->port[i].block_status = false;
} else {
for (i = 0; i < adapter->priv_num; i++) {
priv = adapter->priv[i];
if (!priv)
continue;
if ((priv->bss_role == MWIFIEX_BSS_ROLE_UAP &&
priv->bss_started) ||
(priv->bss_role == MWIFIEX_BSS_ROLE_STA &&
priv->media_connected)) {
active_port = priv->usb_port;
break;
}
}
for (i = 0; i < adapter->priv_num; i++) {
priv = adapter->priv[i];
if (priv)
priv->usb_port = active_port;
}
for (i = 0; i < MWIFIEX_TX_DATA_PORT; i++) {
if (active_port == card->port[i].tx_data_ep)
card->port[i].block_status = false;
else
card->port[i].block_status = true;
}
}
}
static bool mwifiex_usb_is_port_ready(struct mwifiex_private *priv)
{
struct usb_card_rec *card = priv->adapter->card;
int idx;
for (idx = 0; idx < MWIFIEX_TX_DATA_PORT; idx++) {
if (priv->usb_port == card->port[idx].tx_data_ep)
return !card->port[idx].block_status;
}
return false;
}
static inline u8 mwifiex_usb_data_sent(struct mwifiex_adapter *adapter)
{
struct usb_card_rec *card = adapter->card;
int i;
for (i = 0; i < MWIFIEX_TX_DATA_PORT; i++)
if (!card->port[i].block_status)
return false;
return true;
}
/* 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 = NULL;
struct usb_tx_data_port *port = NULL;
u8 *data = (u8 *)skb->data;
struct urb *tx_urb;
int idx, ret = -EINPROGRESS;
if (adapter->is_suspended) {
mwifiex_dbg(adapter, ERROR,
"%s: not allowed while suspended\n", __func__);
return -1;
}
if (adapter->surprise_removed) {
mwifiex_dbg(adapter, ERROR, "%s: device removed\n", __func__);
return -1;
}
mwifiex_dbg(adapter, INFO, "%s: ep=%d\n", __func__, ep);
if (ep == card->tx_cmd_ep) {
context = &card->tx_cmd;
} else {
for (idx = 0; idx < MWIFIEX_TX_DATA_PORT; idx++) {
if (ep == card->port[idx].tx_data_ep) {
port = &card->port[idx];
if (atomic_read(&port->tx_data_urb_pending)
>= MWIFIEX_TX_DATA_URB) {
port->block_status = true;
adapter->data_sent =
mwifiex_usb_data_sent(adapter);
return -EBUSY;
}
if (port->tx_data_ix >= MWIFIEX_TX_DATA_URB)
port->tx_data_ix = 0;
context =
&port->tx_data_list[port->tx_data_ix++];
break;
}
}
if (!port) {
mwifiex_dbg(adapter, ERROR, "Wrong usb tx data port\n");
return -1;
}
}
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(&port->tx_data_urb_pending);
if (ep != card->tx_cmd_ep &&
atomic_read(&port->tx_data_urb_pending) ==
MWIFIEX_TX_DATA_URB) {
port->block_status = true;
adapter->data_sent = mwifiex_usb_data_sent(adapter);
ret = -ENOSR;
}
if (usb_submit_urb(tx_urb, GFP_ATOMIC)) {
mwifiex_dbg(adapter, ERROR,
"%s: usb_submit_urb failed\n", __func__);
if (ep == card->tx_cmd_ep) {
atomic_dec(&card->tx_cmd_urb_pending);
} else {
atomic_dec(&port->tx_data_urb_pending);
port->block_status = false;
adapter->data_sent = false;
if (port->tx_data_ix)
port->tx_data_ix--;
else
port->tx_data_ix = MWIFIEX_TX_DATA_URB;
}
ret = -1;
}
return ret;
}
/* 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;
switch (le16_to_cpu(card->udev->descriptor.idProduct)) {
case USB8997_PID_1:
case USB8997_PID_2:
adapter->tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_4K;
strcpy(adapter->fw_name, USB8997_DEFAULT_FW_NAME);
adapter->ext_scan = true;
break;
case USB8766_PID_1:
case USB8766_PID_2:
adapter->tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_2K;
strcpy(adapter->fw_name, USB8766_DEFAULT_FW_NAME);
adapter->ext_scan = true;
break;
case USB8801_PID_1:
case USB8801_PID_2:
adapter->tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_2K;
strcpy(adapter->fw_name, USB8801_DEFAULT_FW_NAME);
adapter->ext_scan = false;
break;
case USB8797_PID_1:
case USB8797_PID_2:
default:
adapter->tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_2K;
strcpy(adapter->fw_name, USB8797_DEFAULT_FW_NAME);
break;
}
adapter->usb_mc_status = false;
adapter->usb_mc_setup = false;
return 0;
}
static void mwifiex_unregister_dev(struct mwifiex_adapter *adapter)
{
struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
card->adapter = NULL;
}
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 = USB8XXX_FW_MAX_RETRY + 1;
u32 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) {
mwifiex_dbg(adapter, ERROR,
"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) {
ret = -ENOMEM;
goto fw_exit;
}
/* Allocate memory for receive */
recv_buff = kzalloc(FW_DNLD_RX_BUF_SIZE, GFP_KERNEL);
if (!recv_buff) {
ret = -ENOMEM;
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 */
memcpy(&fwdata->fw_hdr, &firmware[tlen],
sizeof(struct fw_header));
dlen = le32_to_cpu(fwdata->fw_hdr.data_len);
dnld_cmd = le32_to_cpu(fwdata->fw_hdr.dnld_cmd);
tlen += sizeof(struct fw_header);
/* Command 7 doesn't have data length field */
if (dnld_cmd == FW_CMD_7)
dlen = 0;
memcpy(fwdata->data, &firmware[tlen], dlen);
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) {
mwifiex_dbg(adapter, ERROR,
"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) {
mwifiex_dbg(adapter, ERROR,
"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) {
mwifiex_dbg(adapter, WARN,
"USB is not the winner %#x\n",
sync_fw.cmd);
/* returning success */
ret = 0;
goto cleanup;
}
mwifiex_dbg(adapter, MSG,
"start to download FW...\n");
check_winner = 0;
break;
}
/* check the firmware block response for CRC errors */
if (sync_fw.cmd) {
mwifiex_dbg(adapter, ERROR,
"FW received block with CRC %#x\n",
sync_fw.cmd);
ret = -1;
continue;
}
retries = USB8XXX_FW_MAX_RETRY + 1;
break;
}
fw_seqnum++;
} while ((dnld_cmd != FW_HAS_LAST_BLOCK) && retries);
cleanup:
mwifiex_dbg(adapter, MSG,
"info: FW download over, size %d bytes\n", 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 == USB8XXX_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 == USB8XXX_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)
{
mwifiex_submit_rx_urb(adapter, MWIFIEX_USB_EP_CMD_EVENT);
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;
del_timer(&adapter->wakeup_timer);
adapter->pm_wakeup_card_req = false;
adapter->ps_state = PS_STATE_AWAKE;
return 0;
}
static void mwifiex_usb_submit_rem_rx_urbs(struct mwifiex_adapter *adapter)
{
struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
int i;
struct urb_context *ctx;
for (i = 0; i < MWIFIEX_RX_DATA_URB; i++) {
if (card->rx_data_list[i].skb)
continue;
ctx = &card->rx_data_list[i];
mwifiex_usb_submit_rx_urb(ctx, MWIFIEX_RX_DATA_BUF_SIZE);
}
}
/* This function is called after the card has woken up. */
static inline int
mwifiex_pm_wakeup_card_complete(struct mwifiex_adapter *adapter)
{
return 0;
}
static struct mwifiex_if_ops usb_ops = {
.register_dev = mwifiex_register_dev,
.unregister_dev = mwifiex_unregister_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,
.host_to_card = mwifiex_usb_host_to_card,
.submit_rem_rx_urbs = mwifiex_usb_submit_rem_rx_urbs,
.multi_port_resync = mwifiex_usb_port_resync,
.is_port_ready = mwifiex_usb_is_port_ready,
};
/* 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(USB8766_DEFAULT_FW_NAME);
MODULE_FIRMWARE(USB8797_DEFAULT_FW_NAME);
MODULE_FIRMWARE(USB8801_DEFAULT_FW_NAME);
MODULE_FIRMWARE(USB8997_DEFAULT_FW_NAME);
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