linux/drivers/net/wireless/libertas/if_sdio.c
Dan Williams 9b02f419a7 libertas: use private SDIO workqueue to avoid scheduling latency
The libertas SDIO interface scheduled the packet worker, resulting in
unwanted latency for every data packet or command sent to the firmware.
Fix a bug on the SDIO probe error path too.

Signed-off-by: Dan Williams <dcbw@redhat.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-02-27 14:52:51 -05:00

1038 lines
21 KiB
C

/*
* linux/drivers/net/wireless/libertas/if_sdio.c
*
* Copyright 2007-2008 Pierre Ossman
*
* Inspired by if_cs.c, Copyright 2007 Holger Schurig
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or (at
* your option) any later version.
*
* This hardware has more or less no CMD53 support, so all registers
* must be accessed using sdio_readb()/sdio_writeb().
*
* Transfers must be in one transaction or the firmware goes bonkers.
* This means that the transfer must either be small enough to do a
* byte based transfer or it must be padded to a multiple of the
* current block size.
*
* As SDIO is still new to the kernel, it is unfortunately common with
* bugs in the host controllers related to that. One such bug is that
* controllers cannot do transfers that aren't a multiple of 4 bytes.
* If you don't have time to fix the host controller driver, you can
* work around the problem by modifying if_sdio_host_to_card() and
* if_sdio_card_to_host() to pad the data.
*/
#include <linux/kernel.h>
#include <linux/moduleparam.h>
#include <linux/firmware.h>
#include <linux/netdevice.h>
#include <linux/delay.h>
#include <linux/mmc/card.h>
#include <linux/mmc/sdio_func.h>
#include <linux/mmc/sdio_ids.h>
#include "host.h"
#include "decl.h"
#include "defs.h"
#include "dev.h"
#include "if_sdio.h"
static char *lbs_helper_name = NULL;
module_param_named(helper_name, lbs_helper_name, charp, 0644);
static char *lbs_fw_name = NULL;
module_param_named(fw_name, lbs_fw_name, charp, 0644);
static const struct sdio_device_id if_sdio_ids[] = {
{ SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, SDIO_DEVICE_ID_MARVELL_LIBERTAS) },
{ /* end: all zeroes */ },
};
MODULE_DEVICE_TABLE(sdio, if_sdio_ids);
struct if_sdio_model {
int model;
const char *helper;
const char *firmware;
};
static struct if_sdio_model if_sdio_models[] = {
{
/* 8385 */
.model = 0x04,
.helper = "sd8385_helper.bin",
.firmware = "sd8385.bin",
},
{
/* 8686 */
.model = 0x0B,
.helper = "sd8686_helper.bin",
.firmware = "sd8686.bin",
},
};
struct if_sdio_packet {
struct if_sdio_packet *next;
u16 nb;
u8 buffer[0] __attribute__((aligned(4)));
};
struct if_sdio_card {
struct sdio_func *func;
struct lbs_private *priv;
int model;
unsigned long ioport;
const char *helper;
const char *firmware;
u8 buffer[65536];
spinlock_t lock;
struct if_sdio_packet *packets;
struct workqueue_struct *workqueue;
struct work_struct packet_worker;
};
/********************************************************************/
/* I/O */
/********************************************************************/
static u16 if_sdio_read_scratch(struct if_sdio_card *card, int *err)
{
int ret, reg;
u16 scratch;
if (card->model == 0x04)
reg = IF_SDIO_SCRATCH_OLD;
else
reg = IF_SDIO_SCRATCH;
scratch = sdio_readb(card->func, reg, &ret);
if (!ret)
scratch |= sdio_readb(card->func, reg + 1, &ret) << 8;
if (err)
*err = ret;
if (ret)
return 0xffff;
return scratch;
}
static int if_sdio_handle_cmd(struct if_sdio_card *card,
u8 *buffer, unsigned size)
{
struct lbs_private *priv = card->priv;
int ret;
unsigned long flags;
u8 i;
lbs_deb_enter(LBS_DEB_SDIO);
if (size > LBS_CMD_BUFFER_SIZE) {
lbs_deb_sdio("response packet too large (%d bytes)\n",
(int)size);
ret = -E2BIG;
goto out;
}
spin_lock_irqsave(&priv->driver_lock, flags);
i = (priv->resp_idx == 0) ? 1 : 0;
BUG_ON(priv->resp_len[i]);
priv->resp_len[i] = size;
memcpy(priv->resp_buf[i], buffer, size);
lbs_notify_command_response(priv, i);
spin_unlock_irqrestore(&card->priv->driver_lock, flags);
ret = 0;
out:
lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
return ret;
}
static int if_sdio_handle_data(struct if_sdio_card *card,
u8 *buffer, unsigned size)
{
int ret;
struct sk_buff *skb;
char *data;
lbs_deb_enter(LBS_DEB_SDIO);
if (size > MRVDRV_ETH_RX_PACKET_BUFFER_SIZE) {
lbs_deb_sdio("response packet too large (%d bytes)\n",
(int)size);
ret = -E2BIG;
goto out;
}
skb = dev_alloc_skb(MRVDRV_ETH_RX_PACKET_BUFFER_SIZE + NET_IP_ALIGN);
if (!skb) {
ret = -ENOMEM;
goto out;
}
skb_reserve(skb, NET_IP_ALIGN);
data = skb_put(skb, size);
memcpy(data, buffer, size);
lbs_process_rxed_packet(card->priv, skb);
ret = 0;
out:
lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
return ret;
}
static int if_sdio_handle_event(struct if_sdio_card *card,
u8 *buffer, unsigned size)
{
int ret;
u32 event;
lbs_deb_enter(LBS_DEB_SDIO);
if (card->model == 0x04) {
event = sdio_readb(card->func, IF_SDIO_EVENT, &ret);
if (ret)
goto out;
/* right shift 3 bits to get the event id */
event >>= 3;
} else {
if (size < 4) {
lbs_deb_sdio("event packet too small (%d bytes)\n",
(int)size);
ret = -EINVAL;
goto out;
}
event = buffer[3] << 24;
event |= buffer[2] << 16;
event |= buffer[1] << 8;
event |= buffer[0] << 0;
}
lbs_queue_event(card->priv, event & 0xFF);
ret = 0;
out:
lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
return ret;
}
static int if_sdio_card_to_host(struct if_sdio_card *card)
{
int ret;
u8 status;
u16 size, type, chunk;
unsigned long timeout;
lbs_deb_enter(LBS_DEB_SDIO);
size = if_sdio_read_scratch(card, &ret);
if (ret)
goto out;
if (size < 4) {
lbs_deb_sdio("invalid packet size (%d bytes) from firmware\n",
(int)size);
ret = -EINVAL;
goto out;
}
timeout = jiffies + HZ;
while (1) {
status = sdio_readb(card->func, IF_SDIO_STATUS, &ret);
if (ret)
goto out;
if (status & IF_SDIO_IO_RDY)
break;
if (time_after(jiffies, timeout)) {
ret = -ETIMEDOUT;
goto out;
}
mdelay(1);
}
/*
* The transfer must be in one transaction or the firmware
* goes suicidal. There's no way to guarantee that for all
* controllers, but we can at least try.
*/
chunk = sdio_align_size(card->func, size);
ret = sdio_readsb(card->func, card->buffer, card->ioport, chunk);
if (ret)
goto out;
chunk = card->buffer[0] | (card->buffer[1] << 8);
type = card->buffer[2] | (card->buffer[3] << 8);
lbs_deb_sdio("packet of type %d and size %d bytes\n",
(int)type, (int)chunk);
if (chunk > size) {
lbs_deb_sdio("packet fragment (%d > %d)\n",
(int)chunk, (int)size);
ret = -EINVAL;
goto out;
}
if (chunk < size) {
lbs_deb_sdio("packet fragment (%d < %d)\n",
(int)chunk, (int)size);
}
switch (type) {
case MVMS_CMD:
ret = if_sdio_handle_cmd(card, card->buffer + 4, chunk - 4);
if (ret)
goto out;
break;
case MVMS_DAT:
ret = if_sdio_handle_data(card, card->buffer + 4, chunk - 4);
if (ret)
goto out;
break;
case MVMS_EVENT:
ret = if_sdio_handle_event(card, card->buffer + 4, chunk - 4);
if (ret)
goto out;
break;
default:
lbs_deb_sdio("invalid type (%d) from firmware\n",
(int)type);
ret = -EINVAL;
goto out;
}
out:
if (ret)
lbs_pr_err("problem fetching packet from firmware\n");
lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
return ret;
}
static void if_sdio_host_to_card_worker(struct work_struct *work)
{
struct if_sdio_card *card;
struct if_sdio_packet *packet;
unsigned long timeout;
u8 status;
int ret;
unsigned long flags;
lbs_deb_enter(LBS_DEB_SDIO);
card = container_of(work, struct if_sdio_card, packet_worker);
while (1) {
spin_lock_irqsave(&card->lock, flags);
packet = card->packets;
if (packet)
card->packets = packet->next;
spin_unlock_irqrestore(&card->lock, flags);
if (!packet)
break;
sdio_claim_host(card->func);
timeout = jiffies + HZ;
while (1) {
status = sdio_readb(card->func, IF_SDIO_STATUS, &ret);
if (ret)
goto release;
if (status & IF_SDIO_IO_RDY)
break;
if (time_after(jiffies, timeout)) {
ret = -ETIMEDOUT;
goto release;
}
mdelay(1);
}
ret = sdio_writesb(card->func, card->ioport,
packet->buffer, packet->nb);
if (ret)
goto release;
release:
sdio_release_host(card->func);
kfree(packet);
}
lbs_deb_leave(LBS_DEB_SDIO);
}
/********************************************************************/
/* Firmware */
/********************************************************************/
static int if_sdio_prog_helper(struct if_sdio_card *card)
{
int ret;
u8 status;
const struct firmware *fw;
unsigned long timeout;
u8 *chunk_buffer;
u32 chunk_size;
const u8 *firmware;
size_t size;
lbs_deb_enter(LBS_DEB_SDIO);
ret = request_firmware(&fw, card->helper, &card->func->dev);
if (ret) {
lbs_pr_err("can't load helper firmware\n");
goto out;
}
chunk_buffer = kzalloc(64, GFP_KERNEL);
if (!chunk_buffer) {
ret = -ENOMEM;
goto release_fw;
}
sdio_claim_host(card->func);
ret = sdio_set_block_size(card->func, 32);
if (ret)
goto release;
firmware = fw->data;
size = fw->size;
while (size) {
timeout = jiffies + HZ;
while (1) {
status = sdio_readb(card->func, IF_SDIO_STATUS, &ret);
if (ret)
goto release;
if ((status & IF_SDIO_IO_RDY) &&
(status & IF_SDIO_DL_RDY))
break;
if (time_after(jiffies, timeout)) {
ret = -ETIMEDOUT;
goto release;
}
mdelay(1);
}
chunk_size = min(size, (size_t)60);
*((__le32*)chunk_buffer) = cpu_to_le32(chunk_size);
memcpy(chunk_buffer + 4, firmware, chunk_size);
/*
lbs_deb_sdio("sending %d bytes chunk\n", chunk_size);
*/
ret = sdio_writesb(card->func, card->ioport,
chunk_buffer, 64);
if (ret)
goto release;
firmware += chunk_size;
size -= chunk_size;
}
/* an empty block marks the end of the transfer */
memset(chunk_buffer, 0, 4);
ret = sdio_writesb(card->func, card->ioport, chunk_buffer, 64);
if (ret)
goto release;
lbs_deb_sdio("waiting for helper to boot...\n");
/* wait for the helper to boot by looking at the size register */
timeout = jiffies + HZ;
while (1) {
u16 req_size;
req_size = sdio_readb(card->func, IF_SDIO_RD_BASE, &ret);
if (ret)
goto release;
req_size |= sdio_readb(card->func, IF_SDIO_RD_BASE + 1, &ret) << 8;
if (ret)
goto release;
if (req_size != 0)
break;
if (time_after(jiffies, timeout)) {
ret = -ETIMEDOUT;
goto release;
}
msleep(10);
}
ret = 0;
release:
sdio_set_block_size(card->func, 0);
sdio_release_host(card->func);
kfree(chunk_buffer);
release_fw:
release_firmware(fw);
out:
if (ret)
lbs_pr_err("failed to load helper firmware\n");
lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
return ret;
}
static int if_sdio_prog_real(struct if_sdio_card *card)
{
int ret;
u8 status;
const struct firmware *fw;
unsigned long timeout;
u8 *chunk_buffer;
u32 chunk_size;
const u8 *firmware;
size_t size, req_size;
lbs_deb_enter(LBS_DEB_SDIO);
ret = request_firmware(&fw, card->firmware, &card->func->dev);
if (ret) {
lbs_pr_err("can't load firmware\n");
goto out;
}
chunk_buffer = kzalloc(512, GFP_KERNEL);
if (!chunk_buffer) {
ret = -ENOMEM;
goto release_fw;
}
sdio_claim_host(card->func);
ret = sdio_set_block_size(card->func, 32);
if (ret)
goto release;
firmware = fw->data;
size = fw->size;
while (size) {
timeout = jiffies + HZ;
while (1) {
status = sdio_readb(card->func, IF_SDIO_STATUS, &ret);
if (ret)
goto release;
if ((status & IF_SDIO_IO_RDY) &&
(status & IF_SDIO_DL_RDY))
break;
if (time_after(jiffies, timeout)) {
ret = -ETIMEDOUT;
goto release;
}
mdelay(1);
}
req_size = sdio_readb(card->func, IF_SDIO_RD_BASE, &ret);
if (ret)
goto release;
req_size |= sdio_readb(card->func, IF_SDIO_RD_BASE + 1, &ret) << 8;
if (ret)
goto release;
/*
lbs_deb_sdio("firmware wants %d bytes\n", (int)req_size);
*/
if (req_size == 0) {
lbs_deb_sdio("firmware helper gave up early\n");
ret = -EIO;
goto release;
}
if (req_size & 0x01) {
lbs_deb_sdio("firmware helper signalled error\n");
ret = -EIO;
goto release;
}
if (req_size > size)
req_size = size;
while (req_size) {
chunk_size = min(req_size, (size_t)512);
memcpy(chunk_buffer, firmware, chunk_size);
/*
lbs_deb_sdio("sending %d bytes (%d bytes) chunk\n",
chunk_size, (chunk_size + 31) / 32 * 32);
*/
ret = sdio_writesb(card->func, card->ioport,
chunk_buffer, roundup(chunk_size, 32));
if (ret)
goto release;
firmware += chunk_size;
size -= chunk_size;
req_size -= chunk_size;
}
}
ret = 0;
lbs_deb_sdio("waiting for firmware to boot...\n");
/* wait for the firmware to boot */
timeout = jiffies + HZ;
while (1) {
u16 scratch;
scratch = if_sdio_read_scratch(card, &ret);
if (ret)
goto release;
if (scratch == IF_SDIO_FIRMWARE_OK)
break;
if (time_after(jiffies, timeout)) {
ret = -ETIMEDOUT;
goto release;
}
msleep(10);
}
ret = 0;
release:
sdio_set_block_size(card->func, 0);
sdio_release_host(card->func);
kfree(chunk_buffer);
release_fw:
release_firmware(fw);
out:
if (ret)
lbs_pr_err("failed to load firmware\n");
lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
return ret;
}
static int if_sdio_prog_firmware(struct if_sdio_card *card)
{
int ret;
u16 scratch;
lbs_deb_enter(LBS_DEB_SDIO);
sdio_claim_host(card->func);
scratch = if_sdio_read_scratch(card, &ret);
sdio_release_host(card->func);
if (ret)
goto out;
if (scratch == IF_SDIO_FIRMWARE_OK) {
lbs_deb_sdio("firmware already loaded\n");
goto success;
}
ret = if_sdio_prog_helper(card);
if (ret)
goto out;
ret = if_sdio_prog_real(card);
if (ret)
goto out;
success:
ret = 0;
out:
lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
return ret;
}
/*******************************************************************/
/* Libertas callbacks */
/*******************************************************************/
static int if_sdio_host_to_card(struct lbs_private *priv,
u8 type, u8 *buf, u16 nb)
{
int ret;
struct if_sdio_card *card;
struct if_sdio_packet *packet, *cur;
u16 size;
unsigned long flags;
lbs_deb_enter_args(LBS_DEB_SDIO, "type %d, bytes %d", type, nb);
card = priv->card;
if (nb > (65536 - sizeof(struct if_sdio_packet) - 4)) {
ret = -EINVAL;
goto out;
}
/*
* The transfer must be in one transaction or the firmware
* goes suicidal. There's no way to guarantee that for all
* controllers, but we can at least try.
*/
size = sdio_align_size(card->func, nb + 4);
packet = kzalloc(sizeof(struct if_sdio_packet) + size,
GFP_ATOMIC);
if (!packet) {
ret = -ENOMEM;
goto out;
}
packet->next = NULL;
packet->nb = size;
/*
* SDIO specific header.
*/
packet->buffer[0] = (nb + 4) & 0xff;
packet->buffer[1] = ((nb + 4) >> 8) & 0xff;
packet->buffer[2] = type;
packet->buffer[3] = 0;
memcpy(packet->buffer + 4, buf, nb);
spin_lock_irqsave(&card->lock, flags);
if (!card->packets)
card->packets = packet;
else {
cur = card->packets;
while (cur->next)
cur = cur->next;
cur->next = packet;
}
switch (type) {
case MVMS_CMD:
priv->dnld_sent = DNLD_CMD_SENT;
break;
case MVMS_DAT:
priv->dnld_sent = DNLD_DATA_SENT;
break;
default:
lbs_deb_sdio("unknown packet type %d\n", (int)type);
}
spin_unlock_irqrestore(&card->lock, flags);
queue_work(card->workqueue, &card->packet_worker);
ret = 0;
out:
lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
return ret;
}
/*******************************************************************/
/* SDIO callbacks */
/*******************************************************************/
static void if_sdio_interrupt(struct sdio_func *func)
{
int ret;
struct if_sdio_card *card;
u8 cause;
lbs_deb_enter(LBS_DEB_SDIO);
card = sdio_get_drvdata(func);
cause = sdio_readb(card->func, IF_SDIO_H_INT_STATUS, &ret);
if (ret)
goto out;
lbs_deb_sdio("interrupt: 0x%X\n", (unsigned)cause);
sdio_writeb(card->func, ~cause, IF_SDIO_H_INT_STATUS, &ret);
if (ret)
goto out;
/*
* Ignore the define name, this really means the card has
* successfully received the command.
*/
if (cause & IF_SDIO_H_INT_DNLD)
lbs_host_to_card_done(card->priv);
if (cause & IF_SDIO_H_INT_UPLD) {
ret = if_sdio_card_to_host(card);
if (ret)
goto out;
}
ret = 0;
out:
lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
}
static int if_sdio_probe(struct sdio_func *func,
const struct sdio_device_id *id)
{
struct if_sdio_card *card;
struct lbs_private *priv;
int ret, i;
unsigned int model;
struct if_sdio_packet *packet;
lbs_deb_enter(LBS_DEB_SDIO);
for (i = 0;i < func->card->num_info;i++) {
if (sscanf(func->card->info[i],
"802.11 SDIO ID: %x", &model) == 1)
break;
if (sscanf(func->card->info[i],
"ID: %x", &model) == 1)
break;
if (!strcmp(func->card->info[i], "IBIS Wireless SDIO Card")) {
model = 4;
break;
}
}
if (i == func->card->num_info) {
lbs_pr_err("unable to identify card model\n");
return -ENODEV;
}
card = kzalloc(sizeof(struct if_sdio_card), GFP_KERNEL);
if (!card)
return -ENOMEM;
card->func = func;
card->model = model;
spin_lock_init(&card->lock);
card->workqueue = create_workqueue("libertas_sdio");
INIT_WORK(&card->packet_worker, if_sdio_host_to_card_worker);
for (i = 0;i < ARRAY_SIZE(if_sdio_models);i++) {
if (card->model == if_sdio_models[i].model)
break;
}
if (i == ARRAY_SIZE(if_sdio_models)) {
lbs_pr_err("unkown card model 0x%x\n", card->model);
ret = -ENODEV;
goto free;
}
card->helper = if_sdio_models[i].helper;
card->firmware = if_sdio_models[i].firmware;
if (lbs_helper_name) {
lbs_deb_sdio("overriding helper firmware: %s\n",
lbs_helper_name);
card->helper = lbs_helper_name;
}
if (lbs_fw_name) {
lbs_deb_sdio("overriding firmware: %s\n", lbs_fw_name);
card->firmware = lbs_fw_name;
}
sdio_claim_host(func);
ret = sdio_enable_func(func);
if (ret)
goto release;
ret = sdio_claim_irq(func, if_sdio_interrupt);
if (ret)
goto disable;
card->ioport = sdio_readb(func, IF_SDIO_IOPORT, &ret);
if (ret)
goto release_int;
card->ioport |= sdio_readb(func, IF_SDIO_IOPORT + 1, &ret) << 8;
if (ret)
goto release_int;
card->ioport |= sdio_readb(func, IF_SDIO_IOPORT + 2, &ret) << 16;
if (ret)
goto release_int;
sdio_release_host(func);
sdio_set_drvdata(func, card);
lbs_deb_sdio("class = 0x%X, vendor = 0x%X, "
"device = 0x%X, model = 0x%X, ioport = 0x%X\n",
func->class, func->vendor, func->device,
model, (unsigned)card->ioport);
ret = if_sdio_prog_firmware(card);
if (ret)
goto reclaim;
priv = lbs_add_card(card, &func->dev);
if (!priv) {
ret = -ENOMEM;
goto reclaim;
}
card->priv = priv;
priv->card = card;
priv->hw_host_to_card = if_sdio_host_to_card;
priv->fw_ready = 1;
/*
* Enable interrupts now that everything is set up
*/
sdio_claim_host(func);
sdio_writeb(func, 0x0f, IF_SDIO_H_INT_MASK, &ret);
sdio_release_host(func);
if (ret)
goto reclaim;
ret = lbs_start_card(priv);
if (ret)
goto err_activate_card;
if (priv->fwcapinfo & FW_CAPINFO_PS)
priv->ps_supported = 1;
out:
lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
return ret;
err_activate_card:
flush_workqueue(card->workqueue);
lbs_remove_card(priv);
reclaim:
sdio_claim_host(func);
release_int:
sdio_release_irq(func);
disable:
sdio_disable_func(func);
release:
sdio_release_host(func);
free:
destroy_workqueue(card->workqueue);
while (card->packets) {
packet = card->packets;
card->packets = card->packets->next;
kfree(packet);
}
kfree(card);
goto out;
}
static void if_sdio_remove(struct sdio_func *func)
{
struct if_sdio_card *card;
struct if_sdio_packet *packet;
lbs_deb_enter(LBS_DEB_SDIO);
card = sdio_get_drvdata(func);
card->priv->surpriseremoved = 1;
lbs_deb_sdio("call remove card\n");
lbs_stop_card(card->priv);
lbs_remove_card(card->priv);
flush_workqueue(card->workqueue);
destroy_workqueue(card->workqueue);
sdio_claim_host(func);
sdio_release_irq(func);
sdio_disable_func(func);
sdio_release_host(func);
while (card->packets) {
packet = card->packets;
card->packets = card->packets->next;
kfree(packet);
}
kfree(card);
lbs_deb_leave(LBS_DEB_SDIO);
}
static struct sdio_driver if_sdio_driver = {
.name = "libertas_sdio",
.id_table = if_sdio_ids,
.probe = if_sdio_probe,
.remove = if_sdio_remove,
};
/*******************************************************************/
/* Module functions */
/*******************************************************************/
static int __init if_sdio_init_module(void)
{
int ret = 0;
lbs_deb_enter(LBS_DEB_SDIO);
printk(KERN_INFO "libertas_sdio: Libertas SDIO driver\n");
printk(KERN_INFO "libertas_sdio: Copyright Pierre Ossman\n");
ret = sdio_register_driver(&if_sdio_driver);
lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
return ret;
}
static void __exit if_sdio_exit_module(void)
{
lbs_deb_enter(LBS_DEB_SDIO);
sdio_unregister_driver(&if_sdio_driver);
lbs_deb_leave(LBS_DEB_SDIO);
}
module_init(if_sdio_init_module);
module_exit(if_sdio_exit_module);
MODULE_DESCRIPTION("Libertas SDIO WLAN Driver");
MODULE_AUTHOR("Pierre Ossman");
MODULE_LICENSE("GPL");