[deliverable/linux.git] / drivers / net / wireless / wl1251 / spi.c

/*
 * This file is part of wl1251
 *
 * Copyright (C) 2008 Nokia Corporation
 *
 * 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/interrupt.h>
#include <linux/irq.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/crc7.h>
#include <linux/spi/spi.h>
#include <linux/wl12xx.h>

#include "wl1251.h"
#include "reg.h"
#include "spi.h"

static irqreturn_t wl1251_irq(int irq, void *cookie)
{
	struct wl1251 *wl;

	wl1251_debug(DEBUG_IRQ, "IRQ");

	wl = cookie;

	ieee80211_queue_work(wl->hw, &wl->irq_work);

	return IRQ_HANDLED;
}

static struct spi_device *wl_to_spi(struct wl1251 *wl)
{
	return wl->if_priv;
}

static void wl1251_spi_reset(struct wl1251 *wl)
{
	u8 *cmd;
	struct spi_transfer t;
	struct spi_message m;

	cmd = kzalloc(WSPI_INIT_CMD_LEN, GFP_KERNEL);
	if (!cmd) {
		wl1251_error("could not allocate cmd for spi reset");
		return;
	}

	memset(&t, 0, sizeof(t));
	spi_message_init(&m);

	memset(cmd, 0xff, WSPI_INIT_CMD_LEN);

	t.tx_buf = cmd;
	t.len = WSPI_INIT_CMD_LEN;
	spi_message_add_tail(&t, &m);

	spi_sync(wl_to_spi(wl), &m);

	wl1251_dump(DEBUG_SPI, "spi reset -> ", cmd, WSPI_INIT_CMD_LEN);
}

static void wl1251_spi_wake(struct wl1251 *wl)
{
	u8 crc[WSPI_INIT_CMD_CRC_LEN], *cmd;
	struct spi_transfer t;
	struct spi_message m;

	cmd = kzalloc(WSPI_INIT_CMD_LEN, GFP_KERNEL);
	if (!cmd) {
		wl1251_error("could not allocate cmd for spi init");
		return;
	}

	memset(crc, 0, sizeof(crc));
	memset(&t, 0, sizeof(t));
	spi_message_init(&m);

	/*
	 * Set WSPI_INIT_COMMAND
	 * the data is being send from the MSB to LSB
	 */
	cmd[2] = 0xff;
	cmd[3] = 0xff;
	cmd[1] = WSPI_INIT_CMD_START | WSPI_INIT_CMD_TX;
	cmd[0] = 0;
	cmd[7] = 0;
	cmd[6] |= HW_ACCESS_WSPI_INIT_CMD_MASK << 3;
	cmd[6] |= HW_ACCESS_WSPI_FIXED_BUSY_LEN & WSPI_INIT_CMD_FIXEDBUSY_LEN;

	if (HW_ACCESS_WSPI_FIXED_BUSY_LEN == 0)
		cmd[5] |=  WSPI_INIT_CMD_DIS_FIXEDBUSY;
	else
		cmd[5] |= WSPI_INIT_CMD_EN_FIXEDBUSY;

	cmd[5] |= WSPI_INIT_CMD_IOD | WSPI_INIT_CMD_IP | WSPI_INIT_CMD_CS
		| WSPI_INIT_CMD_WSPI | WSPI_INIT_CMD_WS;

	crc[0] = cmd[1];
	crc[1] = cmd[0];
	crc[2] = cmd[7];
	crc[3] = cmd[6];
	crc[4] = cmd[5];

	cmd[4] |= crc7(0, crc, WSPI_INIT_CMD_CRC_LEN) << 1;
	cmd[4] |= WSPI_INIT_CMD_END;

	t.tx_buf = cmd;
	t.len = WSPI_INIT_CMD_LEN;
	spi_message_add_tail(&t, &m);

	spi_sync(wl_to_spi(wl), &m);

	wl1251_dump(DEBUG_SPI, "spi init -> ", cmd, WSPI_INIT_CMD_LEN);
}

static void wl1251_spi_reset_wake(struct wl1251 *wl)
{
	wl1251_spi_reset(wl);
	wl1251_spi_wake(wl);
}

static void wl1251_spi_read(struct wl1251 *wl, int addr, void *buf,
			    size_t len)
{
	struct spi_transfer t[3];
	struct spi_message m;
	u8 *busy_buf;
	u32 *cmd;

	cmd = &wl->buffer_cmd;
	busy_buf = wl->buffer_busyword;

	*cmd = 0;
	*cmd |= WSPI_CMD_READ;
	*cmd |= (len << WSPI_CMD_BYTE_LENGTH_OFFSET) & WSPI_CMD_BYTE_LENGTH;
	*cmd |= addr & WSPI_CMD_BYTE_ADDR;

	spi_message_init(&m);
	memset(t, 0, sizeof(t));

	t[0].tx_buf = cmd;
	t[0].len = 4;
	spi_message_add_tail(&t[0], &m);

	/* Busy and non busy words read */
	t[1].rx_buf = busy_buf;
	t[1].len = WL1251_BUSY_WORD_LEN;
	spi_message_add_tail(&t[1], &m);

	t[2].rx_buf = buf;
	t[2].len = len;
	spi_message_add_tail(&t[2], &m);

	spi_sync(wl_to_spi(wl), &m);

	/* FIXME: check busy words */

	wl1251_dump(DEBUG_SPI, "spi_read cmd -> ", cmd, sizeof(*cmd));
	wl1251_dump(DEBUG_SPI, "spi_read buf <- ", buf, len);
}

static void wl1251_spi_write(struct wl1251 *wl, int addr, void *buf,
			     size_t len)
{
	struct spi_transfer t[2];
	struct spi_message m;
	u32 *cmd;

	cmd = &wl->buffer_cmd;

	*cmd = 0;
	*cmd |= WSPI_CMD_WRITE;
	*cmd |= (len << WSPI_CMD_BYTE_LENGTH_OFFSET) & WSPI_CMD_BYTE_LENGTH;
	*cmd |= addr & WSPI_CMD_BYTE_ADDR;

	spi_message_init(&m);
	memset(t, 0, sizeof(t));

	t[0].tx_buf = cmd;
	t[0].len = sizeof(*cmd);
	spi_message_add_tail(&t[0], &m);

	t[1].tx_buf = buf;
	t[1].len = len;
	spi_message_add_tail(&t[1], &m);

	spi_sync(wl_to_spi(wl), &m);

	wl1251_dump(DEBUG_SPI, "spi_write cmd -> ", cmd, sizeof(*cmd));
	wl1251_dump(DEBUG_SPI, "spi_write buf -> ", buf, len);
}

static void wl1251_spi_enable_irq(struct wl1251 *wl)
{
	return enable_irq(wl->irq);
}

static void wl1251_spi_disable_irq(struct wl1251 *wl)
{
	return disable_irq(wl->irq);
}

static int wl1251_spi_set_power(struct wl1251 *wl, bool enable)
{
	if (wl->set_power)
		wl->set_power(enable);

	return 0;
}

static const struct wl1251_if_operations wl1251_spi_ops = {
	.read = wl1251_spi_read,
	.write = wl1251_spi_write,
	.reset = wl1251_spi_reset_wake,
	.enable_irq = wl1251_spi_enable_irq,
	.disable_irq = wl1251_spi_disable_irq,
	.power = wl1251_spi_set_power,
};

static int __devinit wl1251_spi_probe(struct spi_device *spi)
{
	struct wl12xx_platform_data *pdata;
	struct ieee80211_hw *hw;
	struct wl1251 *wl;
	int ret;

	pdata = spi->dev.platform_data;
	if (!pdata) {
		wl1251_error("no platform data");
		return -ENODEV;
	}

	hw = wl1251_alloc_hw();
	if (IS_ERR(hw))
		return PTR_ERR(hw);

	wl = hw->priv;

	SET_IEEE80211_DEV(hw, &spi->dev);
	dev_set_drvdata(&spi->dev, wl);
	wl->if_priv = spi;
	wl->if_ops = &wl1251_spi_ops;

	/* This is the only SPI value that we need to set here, the rest
	 * comes from the board-peripherals file */
	spi->bits_per_word = 32;

	ret = spi_setup(spi);
	if (ret < 0) {
		wl1251_error("spi_setup failed");
		goto out_free;
	}

	wl->set_power = pdata->set_power;
	if (!wl->set_power) {
		wl1251_error("set power function missing in platform data");
		return -ENODEV;
	}

	wl->irq = spi->irq;
	if (wl->irq < 0) {
		wl1251_error("irq missing in platform data");
		return -ENODEV;
	}

	wl->use_eeprom = pdata->use_eeprom;

	ret = request_irq(wl->irq, wl1251_irq, 0, DRIVER_NAME, wl);
	if (ret < 0) {
		wl1251_error("request_irq() failed: %d", ret);
		goto out_free;
	}

	irq_set_irq_type(wl->irq, IRQ_TYPE_EDGE_RISING);

	disable_irq(wl->irq);

	ret = wl1251_init_ieee80211(wl);
	if (ret)
		goto out_irq;

	return 0;

 out_irq:
	free_irq(wl->irq, wl);

 out_free:
	ieee80211_free_hw(hw);

	return ret;
}

static int __devexit wl1251_spi_remove(struct spi_device *spi)
{
	struct wl1251 *wl = dev_get_drvdata(&spi->dev);

	free_irq(wl->irq, wl);
	wl1251_free_hw(wl);

	return 0;
}

static struct spi_driver wl1251_spi_driver = {
	.driver = {
		.name		= DRIVER_NAME,
		.owner		= THIS_MODULE,
	},

	.probe		= wl1251_spi_probe,
	.remove		= __devexit_p(wl1251_spi_remove),
};

static int __init wl1251_spi_init(void)
{
	int ret;

	ret = spi_register_driver(&wl1251_spi_driver);
	if (ret < 0) {
		wl1251_error("failed to register spi driver: %d", ret);
		goto out;
	}

out:
	return ret;
}

static void __exit wl1251_spi_exit(void)
{
	spi_unregister_driver(&wl1251_spi_driver);

	wl1251_notice("unloaded");
}

module_init(wl1251_spi_init);
module_exit(wl1251_spi_exit);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Kalle Valo <kvalo@adurom.com>");
MODULE_ALIAS("spi:wl1251");
Commit	Line	Data
2f01a1f5	1	/*
80301cdc	2	* This file is part of wl1251
2f01a1f5 KV	3	*
	4	* Copyright (C) 2008 Nokia Corporation
	5	*
2f01a1f5 KV	6	* This program is free software; you can redistribute it and/or
	7	* modify it under the terms of the GNU General Public License
	8	* version 2 as published by the Free Software Foundation.
	9	*
	10	* This program is distributed in the hope that it will be useful, but
	11	* WITHOUT ANY WARRANTY; without even the implied warranty of
	12	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	13	* General Public License for more details.
	14	*
	15	* You should have received a copy of the GNU General Public License
	16	* along with this program; if not, write to the Free Software
	17	* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
	18	* 02110-1301 USA
	19	*
	20	*/
	21
a6b7a407	22	#include <linux/interrupt.h>
8e639c06	23	#include <linux/irq.h>
2f01a1f5	24	#include <linux/module.h>
5a0e3ad6	25	#include <linux/slab.h>
2f01a1f5 KV	26	#include <linux/crc7.h>
2f01a1f5 KV	27	#include <linux/spi/spi.h>
c1f9a095	28	#include <linux/wl12xx.h>
2f01a1f5	29
13674118	30	#include "wl1251.h"
9bc6772e KV	31	#include "reg.h"
9bc6772e KV	32	#include "spi.h"
2f01a1f5	33
b5ed9c1b BC	34	static irqreturn_t wl1251_irq(int irq, void *cookie)
	35	{
	36	struct wl1251 *wl;
	37
	38	wl1251_debug(DEBUG_IRQ, "IRQ");
	39
	40	wl = cookie;
	41
16e711f9	42	ieee80211_queue_work(wl->hw, &wl->irq_work);
b5ed9c1b BC	43
	44	return IRQ_HANDLED;
	45	}
	46
af8c78eb BC	47	static struct spi_device wl_to_spi(struct wl1251 wl)
	48	{
	49	return wl->if_priv;
	50	}
	51
08d9f572	52	static void wl1251_spi_reset(struct wl1251 *wl)
2f01a1f5 KV	53	{
	54	u8 *cmd;
	55	struct spi_transfer t;
	56	struct spi_message m;
	57
	58	cmd = kzalloc(WSPI_INIT_CMD_LEN, GFP_KERNEL);
	59	if (!cmd) {
80301cdc	60	wl1251_error("could not allocate cmd for spi reset");
2f01a1f5 KV	61	return;
	62	}
	63
	64	memset(&t, 0, sizeof(t));
	65	spi_message_init(&m);
	66
	67	memset(cmd, 0xff, WSPI_INIT_CMD_LEN);
	68
	69	t.tx_buf = cmd;
	70	t.len = WSPI_INIT_CMD_LEN;
	71	spi_message_add_tail(&t, &m);
	72
af8c78eb	73	spi_sync(wl_to_spi(wl), &m);
2f01a1f5	74
80301cdc	75	wl1251_dump(DEBUG_SPI, "spi reset -> ", cmd, WSPI_INIT_CMD_LEN);
2f01a1f5 KV	76	}
2f01a1f5 KV	77
8e639c06	78	static void wl1251_spi_wake(struct wl1251 *wl)
2f01a1f5 KV	79	{
	80	u8 crc[WSPI_INIT_CMD_CRC_LEN], *cmd;
	81	struct spi_transfer t;
	82	struct spi_message m;
	83
	84	cmd = kzalloc(WSPI_INIT_CMD_LEN, GFP_KERNEL);
	85	if (!cmd) {
80301cdc	86	wl1251_error("could not allocate cmd for spi init");
2f01a1f5 KV	87	return;
	88	}
	89
	90	memset(crc, 0, sizeof(crc));
	91	memset(&t, 0, sizeof(t));
	92	spi_message_init(&m);
	93
	94	/*
	95	* Set WSPI_INIT_COMMAND
	96	* the data is being send from the MSB to LSB
	97	*/
	98	cmd[2] = 0xff;
	99	cmd[3] = 0xff;
	100	cmd[1] = WSPI_INIT_CMD_START \| WSPI_INIT_CMD_TX;
	101	cmd[0] = 0;
	102	cmd[7] = 0;
	103	cmd[6] \|= HW_ACCESS_WSPI_INIT_CMD_MASK << 3;
	104	cmd[6] \|= HW_ACCESS_WSPI_FIXED_BUSY_LEN & WSPI_INIT_CMD_FIXEDBUSY_LEN;
	105
	106	if (HW_ACCESS_WSPI_FIXED_BUSY_LEN == 0)
	107	cmd[5] \|= WSPI_INIT_CMD_DIS_FIXEDBUSY;
	108	else
	109	cmd[5] \|= WSPI_INIT_CMD_EN_FIXEDBUSY;
	110
	111	cmd[5] \|= WSPI_INIT_CMD_IOD \| WSPI_INIT_CMD_IP \| WSPI_INIT_CMD_CS
	112	\| WSPI_INIT_CMD_WSPI \| WSPI_INIT_CMD_WS;
	113
	114	crc[0] = cmd[1];
	115	crc[1] = cmd[0];
	116	crc[2] = cmd[7];
	117	crc[3] = cmd[6];
	118	crc[4] = cmd[5];
	119
	120	cmd[4] \|= crc7(0, crc, WSPI_INIT_CMD_CRC_LEN) << 1;
	121	cmd[4] \|= WSPI_INIT_CMD_END;
	122
	123	t.tx_buf = cmd;
	124	t.len = WSPI_INIT_CMD_LEN;
	125	spi_message_add_tail(&t, &m);
	126
af8c78eb	127	spi_sync(wl_to_spi(wl), &m);
2f01a1f5	128
80301cdc	129	wl1251_dump(DEBUG_SPI, "spi init -> ", cmd, WSPI_INIT_CMD_LEN);
2f01a1f5 KV	130	}
2f01a1f5 KV	131
08d9f572 BC	132	static void wl1251_spi_reset_wake(struct wl1251 *wl)
	133	{
	134	wl1251_spi_reset(wl);
8e639c06	135	wl1251_spi_wake(wl);
08d9f572 BC	136	}
08d9f572 BC	137
08d9f572 BC	138	static void wl1251_spi_read(struct wl1251 wl, int addr, void buf,
08d9f572 BC	139	size_t len)
2f01a1f5 KV	140	{
	141	struct spi_transfer t[3];
	142	struct spi_message m;
5262c12d	143	u8 *busy_buf;
56343a3c	144	u32 *cmd;
2f01a1f5	145
56343a3c	146	cmd = &wl->buffer_cmd;
5262c12d	147	busy_buf = wl->buffer_busyword;
56343a3c KV	148
	149	*cmd = 0;
	150	*cmd \|= WSPI_CMD_READ;
	151	*cmd \|= (len << WSPI_CMD_BYTE_LENGTH_OFFSET) & WSPI_CMD_BYTE_LENGTH;
	152	*cmd \|= addr & WSPI_CMD_BYTE_ADDR;
2f01a1f5 KV	153
	154	spi_message_init(&m);
	155	memset(t, 0, sizeof(t));
	156
56343a3c	157	t[0].tx_buf = cmd;
2f01a1f5 KV	158	t[0].len = 4;
	159	spi_message_add_tail(&t[0], &m);
	160
	161	/* Busy and non busy words read */
	162	t[1].rx_buf = busy_buf;
80301cdc	163	t[1].len = WL1251_BUSY_WORD_LEN;
2f01a1f5 KV	164	spi_message_add_tail(&t[1], &m);
	165
	166	t[2].rx_buf = buf;
	167	t[2].len = len;
	168	spi_message_add_tail(&t[2], &m);
	169
af8c78eb	170	spi_sync(wl_to_spi(wl), &m);
2f01a1f5 KV	171
	172	/* FIXME: check busy words */
	173
80301cdc KV	174	wl1251_dump(DEBUG_SPI, "spi_read cmd -> ", cmd, sizeof(*cmd));
80301cdc KV	175	wl1251_dump(DEBUG_SPI, "spi_read buf <- ", buf, len);
2f01a1f5 KV	176	}
2f01a1f5 KV	177
08d9f572 BC	178	static void wl1251_spi_write(struct wl1251 wl, int addr, void buf,
08d9f572 BC	179	size_t len)
2f01a1f5 KV	180	{
	181	struct spi_transfer t[2];
	182	struct spi_message m;
56343a3c	183	u32 *cmd;
2f01a1f5	184
56343a3c KV	185	cmd = &wl->buffer_cmd;
	186
	187	*cmd = 0;
	188	*cmd \|= WSPI_CMD_WRITE;
	189	*cmd \|= (len << WSPI_CMD_BYTE_LENGTH_OFFSET) & WSPI_CMD_BYTE_LENGTH;
	190	*cmd \|= addr & WSPI_CMD_BYTE_ADDR;
2f01a1f5 KV	191
	192	spi_message_init(&m);
	193	memset(t, 0, sizeof(t));
	194
56343a3c KV	195	t[0].tx_buf = cmd;
56343a3c KV	196	t[0].len = sizeof(*cmd);
2f01a1f5 KV	197	spi_message_add_tail(&t[0], &m);
	198
	199	t[1].tx_buf = buf;
	200	t[1].len = len;
	201	spi_message_add_tail(&t[1], &m);
	202
af8c78eb	203	spi_sync(wl_to_spi(wl), &m);
2f01a1f5	204
80301cdc KV	205	wl1251_dump(DEBUG_SPI, "spi_write cmd -> ", cmd, sizeof(*cmd));
80301cdc KV	206	wl1251_dump(DEBUG_SPI, "spi_write buf -> ", buf, len);
2f01a1f5	207	}
08d9f572	208
b5ed9c1b BC	209	static void wl1251_spi_enable_irq(struct wl1251 *wl)
	210	{
	211	return enable_irq(wl->irq);
	212	}
	213
	214	static void wl1251_spi_disable_irq(struct wl1251 *wl)
	215	{
	216	return disable_irq(wl->irq);
	217	}
	218
cb7bbc7a GI	219	static int wl1251_spi_set_power(struct wl1251 *wl, bool enable)
	220	{
	221	if (wl->set_power)
	222	wl->set_power(enable);
	223
	224	return 0;
	225	}
	226
af8c78eb	227	static const struct wl1251_if_operations wl1251_spi_ops = {
08d9f572 BC	228	.read = wl1251_spi_read,
	229	.write = wl1251_spi_write,
	230	.reset = wl1251_spi_reset_wake,
b5ed9c1b BC	231	.enable_irq = wl1251_spi_enable_irq,
b5ed9c1b BC	232	.disable_irq = wl1251_spi_disable_irq,
cb7bbc7a	233	.power = wl1251_spi_set_power,
08d9f572	234	};
8e639c06 BC	235
	236	static int __devinit wl1251_spi_probe(struct spi_device *spi)
	237	{
	238	struct wl12xx_platform_data *pdata;
	239	struct ieee80211_hw *hw;
	240	struct wl1251 *wl;
	241	int ret;
	242
	243	pdata = spi->dev.platform_data;
	244	if (!pdata) {
	245	wl1251_error("no platform data");
	246	return -ENODEV;
	247	}
	248
	249	hw = wl1251_alloc_hw();
	250	if (IS_ERR(hw))
	251	return PTR_ERR(hw);
	252
	253	wl = hw->priv;
	254
	255	SET_IEEE80211_DEV(hw, &spi->dev);
	256	dev_set_drvdata(&spi->dev, wl);
af8c78eb	257	wl->if_priv = spi;
8e639c06 BC	258	wl->if_ops = &wl1251_spi_ops;
	259
	260	/* This is the only SPI value that we need to set here, the rest
	261	* comes from the board-peripherals file */
	262	spi->bits_per_word = 32;
	263
	264	ret = spi_setup(spi);
	265	if (ret < 0) {
	266	wl1251_error("spi_setup failed");
	267	goto out_free;
	268	}
	269
	270	wl->set_power = pdata->set_power;
	271	if (!wl->set_power) {
	272	wl1251_error("set power function missing in platform data");
	273	return -ENODEV;
	274	}
	275
	276	wl->irq = spi->irq;
	277	if (wl->irq < 0) {
	278	wl1251_error("irq missing in platform data");
	279	return -ENODEV;
	280	}
	281
c95cf3d0 DJW	282	wl->use_eeprom = pdata->use_eeprom;
c95cf3d0 DJW	283
8e639c06 BC	284	ret = request_irq(wl->irq, wl1251_irq, 0, DRIVER_NAME, wl);
	285	if (ret < 0) {
	286	wl1251_error("request_irq() failed: %d", ret);
	287	goto out_free;
	288	}
	289
dced35ae	290	irq_set_irq_type(wl->irq, IRQ_TYPE_EDGE_RISING);
8e639c06 BC	291
	292	disable_irq(wl->irq);
	293
	294	ret = wl1251_init_ieee80211(wl);
	295	if (ret)
	296	goto out_irq;
	297
	298	return 0;
	299
	300	out_irq:
	301	free_irq(wl->irq, wl);
	302
	303	out_free:
	304	ieee80211_free_hw(hw);
	305
	306	return ret;
	307	}
	308
	309	static int __devexit wl1251_spi_remove(struct spi_device *spi)
	310	{
	311	struct wl1251 *wl = dev_get_drvdata(&spi->dev);
	312
b5ed9c1b	313	free_irq(wl->irq, wl);
8e639c06 BC	314	wl1251_free_hw(wl);
	315
	316	return 0;
	317	}
	318
	319	static struct spi_driver wl1251_spi_driver = {
	320	.driver = {
7590a550	321	.name = DRIVER_NAME,
8e639c06 BC	322	.owner = THIS_MODULE,
	323	},
	324
	325	.probe = wl1251_spi_probe,
	326	.remove = __devexit_p(wl1251_spi_remove),
	327	};
	328
	329	static int __init wl1251_spi_init(void)
	330	{
	331	int ret;
	332
	333	ret = spi_register_driver(&wl1251_spi_driver);
	334	if (ret < 0) {
	335	wl1251_error("failed to register spi driver: %d", ret);
	336	goto out;
	337	}
	338
	339	out:
	340	return ret;
	341	}
	342
	343	static void __exit wl1251_spi_exit(void)
	344	{
	345	spi_unregister_driver(&wl1251_spi_driver);
	346
	347	wl1251_notice("unloaded");
	348	}
	349
	350	module_init(wl1251_spi_init);
	351	module_exit(wl1251_spi_exit);
	352
	353	MODULE_LICENSE("GPL");
31c726f0	354	MODULE_AUTHOR("Kalle Valo <kvalo@adurom.com>");
f148cfdd	355	MODULE_ALIAS("spi:wl1251");