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linux-next/drivers/net/wireless/wl12xx/wl1251.c
Luciano Coelho 0d1c38398f wl12xx: moved firmware version reading routine to chip-specific functions
With WL1271, the firmware version can only be read right after booting the
chip.  To keep WL1251 aligned with this procedure, the code that reads the
firmware version initially has been moved to a common place where it can be
read from both chipsets.

Signed-off-by: Luciano Coelho <luciano.coelho@nokia.com>
Signed-off-by: Kalle Valo <kalle.valo@nokia.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-07-10 14:57:45 -04:00

721 lines
18 KiB
C

/*
* This file is part of wl12xx
*
* Copyright (C) 2008-2009 Nokia Corporation
*
* Contact: Kalle Valo <kalle.valo@nokia.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include "wl1251.h"
#include "reg.h"
#include "spi.h"
#include "boot.h"
#include "event.h"
#include "acx.h"
#include "tx.h"
#include "rx.h"
#include "ps.h"
#include "init.h"
static struct wl12xx_partition_set wl1251_part_table[PART_TABLE_LEN] = {
[PART_DOWN] = {
.mem = {
.start = 0x00000000,
.size = 0x00016800
},
.reg = {
.start = REGISTERS_BASE,
.size = REGISTERS_DOWN_SIZE
},
},
[PART_WORK] = {
.mem = {
.start = 0x00028000,
.size = 0x00014000
},
.reg = {
.start = REGISTERS_BASE,
.size = REGISTERS_WORK_SIZE
},
},
/* WL1251 doesn't use the DRPW partition, so we don't set it here */
};
static enum wl12xx_acx_int_reg wl1251_acx_reg_table[ACX_REG_TABLE_LEN] = {
[ACX_REG_INTERRUPT_TRIG] = (REGISTERS_BASE + 0x0474),
[ACX_REG_INTERRUPT_TRIG_H] = (REGISTERS_BASE + 0x0478),
[ACX_REG_INTERRUPT_MASK] = (REGISTERS_BASE + 0x0494),
[ACX_REG_HINT_MASK_SET] = (REGISTERS_BASE + 0x0498),
[ACX_REG_HINT_MASK_CLR] = (REGISTERS_BASE + 0x049C),
[ACX_REG_INTERRUPT_NO_CLEAR] = (REGISTERS_BASE + 0x04B0),
[ACX_REG_INTERRUPT_CLEAR] = (REGISTERS_BASE + 0x04A4),
[ACX_REG_INTERRUPT_ACK] = (REGISTERS_BASE + 0x04A8),
[ACX_REG_SLV_SOFT_RESET] = (REGISTERS_BASE + 0x0000),
[ACX_REG_EE_START] = (REGISTERS_BASE + 0x080C),
[ACX_REG_ECPU_CONTROL] = (REGISTERS_BASE + 0x0804)
};
static int wl1251_upload_firmware(struct wl12xx *wl)
{
struct wl12xx_partition_set *p_table = wl->chip.p_table;
int addr, chunk_num, partition_limit;
size_t fw_data_len;
u8 *p;
/* whal_FwCtrl_LoadFwImageSm() */
wl12xx_debug(DEBUG_BOOT, "chip id before fw upload: 0x%x",
wl12xx_reg_read32(wl, CHIP_ID_B));
/* 10.0 check firmware length and set partition */
fw_data_len = (wl->fw[4] << 24) | (wl->fw[5] << 16) |
(wl->fw[6] << 8) | (wl->fw[7]);
wl12xx_debug(DEBUG_BOOT, "fw_data_len %zu chunk_size %d", fw_data_len,
CHUNK_SIZE);
if ((fw_data_len % 4) != 0) {
wl12xx_error("firmware length not multiple of four");
return -EIO;
}
wl12xx_set_partition(wl,
p_table[PART_DOWN].mem.start,
p_table[PART_DOWN].mem.size,
p_table[PART_DOWN].reg.start,
p_table[PART_DOWN].reg.size);
/* 10.1 set partition limit and chunk num */
chunk_num = 0;
partition_limit = p_table[PART_DOWN].mem.size;
while (chunk_num < fw_data_len / CHUNK_SIZE) {
/* 10.2 update partition, if needed */
addr = p_table[PART_DOWN].mem.start +
(chunk_num + 2) * CHUNK_SIZE;
if (addr > partition_limit) {
addr = p_table[PART_DOWN].mem.start +
chunk_num * CHUNK_SIZE;
partition_limit = chunk_num * CHUNK_SIZE +
p_table[PART_DOWN].mem.size;
wl12xx_set_partition(wl,
addr,
p_table[PART_DOWN].mem.size,
p_table[PART_DOWN].reg.start,
p_table[PART_DOWN].reg.size);
}
/* 10.3 upload the chunk */
addr = p_table[PART_DOWN].mem.start + chunk_num * CHUNK_SIZE;
p = wl->fw + FW_HDR_SIZE + chunk_num * CHUNK_SIZE;
wl12xx_debug(DEBUG_BOOT, "uploading fw chunk 0x%p to 0x%x",
p, addr);
wl12xx_spi_mem_write(wl, addr, p, CHUNK_SIZE);
chunk_num++;
}
/* 10.4 upload the last chunk */
addr = p_table[PART_DOWN].mem.start + chunk_num * CHUNK_SIZE;
p = wl->fw + FW_HDR_SIZE + chunk_num * CHUNK_SIZE;
wl12xx_debug(DEBUG_BOOT, "uploading fw last chunk (%zu B) 0x%p to 0x%x",
fw_data_len % CHUNK_SIZE, p, addr);
wl12xx_spi_mem_write(wl, addr, p, fw_data_len % CHUNK_SIZE);
return 0;
}
static int wl1251_upload_nvs(struct wl12xx *wl)
{
size_t nvs_len, nvs_bytes_written, burst_len;
int nvs_start, i;
u32 dest_addr, val;
u8 *nvs_ptr, *nvs;
nvs = wl->nvs;
if (nvs == NULL)
return -ENODEV;
nvs_ptr = nvs;
nvs_len = wl->nvs_len;
nvs_start = wl->fw_len;
/*
* Layout before the actual NVS tables:
* 1 byte : burst length.
* 2 bytes: destination address.
* n bytes: data to burst copy.
*
* This is ended by a 0 length, then the NVS tables.
*/
while (nvs_ptr[0]) {
burst_len = nvs_ptr[0];
dest_addr = (nvs_ptr[1] & 0xfe) | ((u32)(nvs_ptr[2] << 8));
/* We move our pointer to the data */
nvs_ptr += 3;
for (i = 0; i < burst_len; i++) {
val = (nvs_ptr[0] | (nvs_ptr[1] << 8)
| (nvs_ptr[2] << 16) | (nvs_ptr[3] << 24));
wl12xx_debug(DEBUG_BOOT,
"nvs burst write 0x%x: 0x%x",
dest_addr, val);
wl12xx_mem_write32(wl, dest_addr, val);
nvs_ptr += 4;
dest_addr += 4;
}
}
/*
* We've reached the first zero length, the first NVS table
* is 7 bytes further.
*/
nvs_ptr += 7;
nvs_len -= nvs_ptr - nvs;
nvs_len = ALIGN(nvs_len, 4);
/* Now we must set the partition correctly */
wl12xx_set_partition(wl, nvs_start,
wl->chip.p_table[PART_DOWN].mem.size,
wl->chip.p_table[PART_DOWN].reg.start,
wl->chip.p_table[PART_DOWN].reg.size);
/* And finally we upload the NVS tables */
nvs_bytes_written = 0;
while (nvs_bytes_written < nvs_len) {
val = (nvs_ptr[0] | (nvs_ptr[1] << 8)
| (nvs_ptr[2] << 16) | (nvs_ptr[3] << 24));
val = cpu_to_le32(val);
wl12xx_debug(DEBUG_BOOT,
"nvs write table 0x%x: 0x%x",
nvs_start, val);
wl12xx_mem_write32(wl, nvs_start, val);
nvs_ptr += 4;
nvs_bytes_written += 4;
nvs_start += 4;
}
return 0;
}
static int wl1251_boot(struct wl12xx *wl)
{
int ret = 0, minor_minor_e2_ver;
u32 tmp, boot_data;
ret = wl12xx_boot_soft_reset(wl);
if (ret < 0)
goto out;
/* 2. start processing NVS file */
ret = wl->chip.op_upload_nvs(wl);
if (ret < 0)
goto out;
/* write firmware's last address (ie. it's length) to
* ACX_EEPROMLESS_IND_REG */
wl12xx_reg_write32(wl, ACX_EEPROMLESS_IND_REG, wl->fw_len);
/* 6. read the EEPROM parameters */
tmp = wl12xx_reg_read32(wl, SCR_PAD2);
/* 7. read bootdata */
wl->boot_attr.radio_type = (tmp & 0x0000FF00) >> 8;
wl->boot_attr.major = (tmp & 0x00FF0000) >> 16;
tmp = wl12xx_reg_read32(wl, SCR_PAD3);
/* 8. check bootdata and call restart sequence */
wl->boot_attr.minor = (tmp & 0x00FF0000) >> 16;
minor_minor_e2_ver = (tmp & 0xFF000000) >> 24;
wl12xx_debug(DEBUG_BOOT, "radioType 0x%x majorE2Ver 0x%x "
"minorE2Ver 0x%x minor_minor_e2_ver 0x%x",
wl->boot_attr.radio_type, wl->boot_attr.major,
wl->boot_attr.minor, minor_minor_e2_ver);
ret = wl12xx_boot_init_seq(wl);
if (ret < 0)
goto out;
/* 9. NVS processing done */
boot_data = wl12xx_reg_read32(wl, ACX_REG_ECPU_CONTROL);
wl12xx_debug(DEBUG_BOOT, "halt boot_data 0x%x", boot_data);
/* 10. check that ECPU_CONTROL_HALT bits are set in
* pWhalBus->uBootData and start uploading firmware
*/
if ((boot_data & ECPU_CONTROL_HALT) == 0) {
wl12xx_error("boot failed, ECPU_CONTROL_HALT not set");
ret = -EIO;
goto out;
}
ret = wl->chip.op_upload_fw(wl);
if (ret < 0)
goto out;
/* 10.5 start firmware */
ret = wl12xx_boot_run_firmware(wl);
if (ret < 0)
goto out;
out:
return ret;
}
static int wl1251_mem_cfg(struct wl12xx *wl)
{
struct wl1251_acx_config_memory *mem_conf;
int ret, i;
wl12xx_debug(DEBUG_ACX, "wl1251 mem cfg");
mem_conf = kzalloc(sizeof(*mem_conf), GFP_KERNEL);
if (!mem_conf) {
ret = -ENOMEM;
goto out;
}
/* memory config */
mem_conf->mem_config.num_stations = cpu_to_le16(DEFAULT_NUM_STATIONS);
mem_conf->mem_config.rx_mem_block_num = 35;
mem_conf->mem_config.tx_min_mem_block_num = 64;
mem_conf->mem_config.num_tx_queues = MAX_TX_QUEUES;
mem_conf->mem_config.host_if_options = HOSTIF_PKT_RING;
mem_conf->mem_config.num_ssid_profiles = 1;
mem_conf->mem_config.debug_buffer_size =
cpu_to_le16(TRACE_BUFFER_MAX_SIZE);
/* RX queue config */
mem_conf->rx_queue_config.dma_address = 0;
mem_conf->rx_queue_config.num_descs = ACX_RX_DESC_DEF;
mem_conf->rx_queue_config.priority = DEFAULT_RXQ_PRIORITY;
mem_conf->rx_queue_config.type = DEFAULT_RXQ_TYPE;
/* TX queue config */
for (i = 0; i < MAX_TX_QUEUES; i++) {
mem_conf->tx_queue_config[i].num_descs = ACX_TX_DESC_DEF;
mem_conf->tx_queue_config[i].attributes = i;
}
ret = wl12xx_cmd_configure(wl, ACX_MEM_CFG, mem_conf,
sizeof(*mem_conf));
if (ret < 0) {
wl12xx_warning("wl1251 mem config failed: %d", ret);
goto out;
}
out:
kfree(mem_conf);
return ret;
}
static int wl1251_hw_init_mem_config(struct wl12xx *wl)
{
int ret;
ret = wl1251_mem_cfg(wl);
if (ret < 0)
return ret;
wl->target_mem_map = kzalloc(sizeof(struct wl1251_acx_mem_map),
GFP_KERNEL);
if (!wl->target_mem_map) {
wl12xx_error("couldn't allocate target memory map");
return -ENOMEM;
}
/* we now ask for the firmware built memory map */
ret = wl12xx_acx_mem_map(wl, wl->target_mem_map,
sizeof(struct wl1251_acx_mem_map));
if (ret < 0) {
wl12xx_error("couldn't retrieve firmware memory map");
kfree(wl->target_mem_map);
wl->target_mem_map = NULL;
return ret;
}
return 0;
}
static void wl1251_set_ecpu_ctrl(struct wl12xx *wl, u32 flag)
{
u32 cpu_ctrl;
/* 10.5.0 run the firmware (I) */
cpu_ctrl = wl12xx_reg_read32(wl, ACX_REG_ECPU_CONTROL);
/* 10.5.1 run the firmware (II) */
cpu_ctrl &= ~flag;
wl12xx_reg_write32(wl, ACX_REG_ECPU_CONTROL, cpu_ctrl);
}
static void wl1251_target_enable_interrupts(struct wl12xx *wl)
{
/* Enable target's interrupts */
wl->intr_mask = WL1251_ACX_INTR_RX0_DATA |
WL1251_ACX_INTR_RX1_DATA |
WL1251_ACX_INTR_TX_RESULT |
WL1251_ACX_INTR_EVENT_A |
WL1251_ACX_INTR_EVENT_B |
WL1251_ACX_INTR_INIT_COMPLETE;
wl12xx_boot_target_enable_interrupts(wl);
}
static void wl1251_fw_version(struct wl12xx *wl)
{
wl12xx_acx_fw_version(wl, wl->chip.fw_ver, sizeof(wl->chip.fw_ver));
}
static void wl1251_irq_work(struct work_struct *work)
{
u32 intr;
struct wl12xx *wl =
container_of(work, struct wl12xx, irq_work);
mutex_lock(&wl->mutex);
wl12xx_debug(DEBUG_IRQ, "IRQ work");
if (wl->state == WL12XX_STATE_OFF)
goto out;
wl12xx_ps_elp_wakeup(wl);
wl12xx_reg_write32(wl, ACX_REG_INTERRUPT_MASK, WL1251_ACX_INTR_ALL);
intr = wl12xx_reg_read32(wl, ACX_REG_INTERRUPT_CLEAR);
wl12xx_debug(DEBUG_IRQ, "intr: 0x%x", intr);
if (wl->data_path) {
wl->rx_counter =
wl12xx_mem_read32(wl, wl->data_path->rx_control_addr);
/* We handle a frmware bug here */
switch ((wl->rx_counter - wl->rx_handled) & 0xf) {
case 0:
wl12xx_debug(DEBUG_IRQ, "RX: FW and host in sync");
intr &= ~WL1251_ACX_INTR_RX0_DATA;
intr &= ~WL1251_ACX_INTR_RX1_DATA;
break;
case 1:
wl12xx_debug(DEBUG_IRQ, "RX: FW +1");
intr |= WL1251_ACX_INTR_RX0_DATA;
intr &= ~WL1251_ACX_INTR_RX1_DATA;
break;
case 2:
wl12xx_debug(DEBUG_IRQ, "RX: FW +2");
intr |= WL1251_ACX_INTR_RX0_DATA;
intr |= WL1251_ACX_INTR_RX1_DATA;
break;
default:
wl12xx_warning("RX: FW and host out of sync: %d",
wl->rx_counter - wl->rx_handled);
break;
}
wl->rx_handled = wl->rx_counter;
wl12xx_debug(DEBUG_IRQ, "RX counter: %d", wl->rx_counter);
}
intr &= wl->intr_mask;
if (intr == 0) {
wl12xx_debug(DEBUG_IRQ, "INTR is 0");
wl12xx_reg_write32(wl, ACX_REG_INTERRUPT_MASK,
~(wl->intr_mask));
goto out_sleep;
}
if (intr & WL1251_ACX_INTR_RX0_DATA) {
wl12xx_debug(DEBUG_IRQ, "WL1251_ACX_INTR_RX0_DATA");
wl12xx_rx(wl);
}
if (intr & WL1251_ACX_INTR_RX1_DATA) {
wl12xx_debug(DEBUG_IRQ, "WL1251_ACX_INTR_RX1_DATA");
wl12xx_rx(wl);
}
if (intr & WL1251_ACX_INTR_TX_RESULT) {
wl12xx_debug(DEBUG_IRQ, "WL1251_ACX_INTR_TX_RESULT");
wl12xx_tx_complete(wl);
}
if (intr & (WL1251_ACX_INTR_EVENT_A | WL1251_ACX_INTR_EVENT_B)) {
wl12xx_debug(DEBUG_IRQ, "WL1251_ACX_INTR_EVENT (0x%x)", intr);
if (intr & WL1251_ACX_INTR_EVENT_A)
wl12xx_event_handle(wl, 0);
else
wl12xx_event_handle(wl, 1);
}
if (intr & WL1251_ACX_INTR_INIT_COMPLETE)
wl12xx_debug(DEBUG_IRQ, "WL1251_ACX_INTR_INIT_COMPLETE");
wl12xx_reg_write32(wl, ACX_REG_INTERRUPT_MASK, ~(wl->intr_mask));
out_sleep:
wl12xx_ps_elp_sleep(wl);
out:
mutex_unlock(&wl->mutex);
}
static int wl1251_hw_init_txq_fill(u8 qid,
struct acx_tx_queue_qos_config *config,
u32 num_blocks)
{
config->qid = qid;
switch (qid) {
case QOS_AC_BE:
config->high_threshold =
(QOS_TX_HIGH_BE_DEF * num_blocks) / 100;
config->low_threshold =
(QOS_TX_LOW_BE_DEF * num_blocks) / 100;
break;
case QOS_AC_BK:
config->high_threshold =
(QOS_TX_HIGH_BK_DEF * num_blocks) / 100;
config->low_threshold =
(QOS_TX_LOW_BK_DEF * num_blocks) / 100;
break;
case QOS_AC_VI:
config->high_threshold =
(QOS_TX_HIGH_VI_DEF * num_blocks) / 100;
config->low_threshold =
(QOS_TX_LOW_VI_DEF * num_blocks) / 100;
break;
case QOS_AC_VO:
config->high_threshold =
(QOS_TX_HIGH_VO_DEF * num_blocks) / 100;
config->low_threshold =
(QOS_TX_LOW_VO_DEF * num_blocks) / 100;
break;
default:
wl12xx_error("Invalid TX queue id: %d", qid);
return -EINVAL;
}
return 0;
}
static int wl1251_hw_init_tx_queue_config(struct wl12xx *wl)
{
struct acx_tx_queue_qos_config *config;
struct wl1251_acx_mem_map *wl_mem_map = wl->target_mem_map;
int ret, i;
wl12xx_debug(DEBUG_ACX, "acx tx queue config");
config = kzalloc(sizeof(*config), GFP_KERNEL);
if (!config) {
ret = -ENOMEM;
goto out;
}
for (i = 0; i < MAX_NUM_OF_AC; i++) {
ret = wl1251_hw_init_txq_fill(i, config,
wl_mem_map->num_tx_mem_blocks);
if (ret < 0)
goto out;
ret = wl12xx_cmd_configure(wl, ACX_TX_QUEUE_CFG,
config, sizeof(*config));
if (ret < 0)
goto out;
}
out:
kfree(config);
return ret;
}
static int wl1251_hw_init_data_path_config(struct wl12xx *wl)
{
int ret;
/* asking for the data path parameters */
wl->data_path = kzalloc(sizeof(struct acx_data_path_params_resp),
GFP_KERNEL);
if (!wl->data_path) {
wl12xx_error("Couldnt allocate data path parameters");
return -ENOMEM;
}
ret = wl12xx_acx_data_path_params(wl, wl->data_path);
if (ret < 0) {
kfree(wl->data_path);
wl->data_path = NULL;
return ret;
}
return 0;
}
static int wl1251_hw_init(struct wl12xx *wl)
{
struct wl1251_acx_mem_map *wl_mem_map;
int ret;
ret = wl12xx_hw_init_hwenc_config(wl);
if (ret < 0)
return ret;
/* Template settings */
ret = wl12xx_hw_init_templates_config(wl);
if (ret < 0)
return ret;
/* Default memory configuration */
ret = wl1251_hw_init_mem_config(wl);
if (ret < 0)
return ret;
/* Default data path configuration */
ret = wl1251_hw_init_data_path_config(wl);
if (ret < 0)
goto out_free_memmap;
/* RX config */
ret = wl12xx_hw_init_rx_config(wl,
RX_CFG_PROMISCUOUS | RX_CFG_TSF,
RX_FILTER_OPTION_DEF);
/* RX_CONFIG_OPTION_ANY_DST_ANY_BSS,
RX_FILTER_OPTION_FILTER_ALL); */
if (ret < 0)
goto out_free_data_path;
/* TX queues config */
ret = wl1251_hw_init_tx_queue_config(wl);
if (ret < 0)
goto out_free_data_path;
/* PHY layer config */
ret = wl12xx_hw_init_phy_config(wl);
if (ret < 0)
goto out_free_data_path;
/* Beacon filtering */
ret = wl12xx_hw_init_beacon_filter(wl);
if (ret < 0)
goto out_free_data_path;
/* Bluetooth WLAN coexistence */
ret = wl12xx_hw_init_pta(wl);
if (ret < 0)
goto out_free_data_path;
/* Energy detection */
ret = wl12xx_hw_init_energy_detection(wl);
if (ret < 0)
goto out_free_data_path;
/* Beacons and boradcast settings */
ret = wl12xx_hw_init_beacon_broadcast(wl);
if (ret < 0)
goto out_free_data_path;
/* Enable data path */
ret = wl12xx_cmd_data_path(wl, wl->channel, 1);
if (ret < 0)
goto out_free_data_path;
/* Default power state */
ret = wl12xx_hw_init_power_auth(wl);
if (ret < 0)
goto out_free_data_path;
wl_mem_map = wl->target_mem_map;
wl12xx_info("%d tx blocks at 0x%x, %d rx blocks at 0x%x",
wl_mem_map->num_tx_mem_blocks,
wl->data_path->tx_control_addr,
wl_mem_map->num_rx_mem_blocks,
wl->data_path->rx_control_addr);
return 0;
out_free_data_path:
kfree(wl->data_path);
out_free_memmap:
kfree(wl->target_mem_map);
return ret;
}
static int wl1251_plt_init(struct wl12xx *wl)
{
int ret;
ret = wl1251_hw_init_mem_config(wl);
if (ret < 0)
return ret;
ret = wl12xx_cmd_data_path(wl, wl->channel, 1);
if (ret < 0)
return ret;
return 0;
}
void wl1251_setup(struct wl12xx *wl)
{
/* FIXME: Is it better to use strncpy here or is this ok? */
wl->chip.fw_filename = WL1251_FW_NAME;
wl->chip.nvs_filename = WL1251_NVS_NAME;
/* Now we know what chip we're using, so adjust the power on sleep
* time accordingly */
wl->chip.power_on_sleep = WL1251_POWER_ON_SLEEP;
wl->chip.intr_cmd_complete = WL1251_ACX_INTR_CMD_COMPLETE;
wl->chip.intr_init_complete = WL1251_ACX_INTR_INIT_COMPLETE;
wl->chip.op_upload_nvs = wl1251_upload_nvs;
wl->chip.op_upload_fw = wl1251_upload_firmware;
wl->chip.op_boot = wl1251_boot;
wl->chip.op_set_ecpu_ctrl = wl1251_set_ecpu_ctrl;
wl->chip.op_target_enable_interrupts = wl1251_target_enable_interrupts;
wl->chip.op_hw_init = wl1251_hw_init;
wl->chip.op_plt_init = wl1251_plt_init;
wl->chip.op_fw_version = wl1251_fw_version;
wl->chip.p_table = wl1251_part_table;
wl->chip.acx_reg_table = wl1251_acx_reg_table;
INIT_WORK(&wl->irq_work, wl1251_irq_work);
}