[deliverable/linux.git] / drivers / net / wireless / ti / 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/swab.h>
#include <linux/crc7.h>
#include <linux/spi/spi.h>
#include <linux/wl12xx.h>
#include <linux/gpio.h>
#include <linux/of.h>
#include <linux/of_gpio.h>
#include <linux/regulator/consumer.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);

	kfree(cmd);
}

static void wl1251_spi_wake(struct wl1251 *wl)
{
	struct spi_transfer t;
	struct spi_message m;
	u8 *cmd = kzalloc(WSPI_INIT_CMD_LEN, GFP_KERNEL);

	if (!cmd) {
		wl1251_error("could not allocate cmd for spi init");
		return;
	}

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

	/* Set WSPI_INIT_COMMAND
	 * the data is being send from the MSB to LSB
	 */
	cmd[0] = 0xff;
	cmd[1] = 0xff;
	cmd[2] = WSPI_INIT_CMD_START | WSPI_INIT_CMD_TX;
	cmd[3] = 0;
	cmd[4] = 0;
	cmd[5] = HW_ACCESS_WSPI_INIT_CMD_MASK << 3;
	cmd[5] |= HW_ACCESS_WSPI_FIXED_BUSY_LEN & WSPI_INIT_CMD_FIXEDBUSY_LEN;

	cmd[6] = WSPI_INIT_CMD_IOD | WSPI_INIT_CMD_IP | WSPI_INIT_CMD_CS
		| WSPI_INIT_CMD_WSPI | WSPI_INIT_CMD_WS;

	if (HW_ACCESS_WSPI_FIXED_BUSY_LEN == 0)
		cmd[6] |= WSPI_INIT_CMD_DIS_FIXEDBUSY;
	else
		cmd[6] |= WSPI_INIT_CMD_EN_FIXEDBUSY;

	cmd[7] = crc7_be(0, cmd+2, WSPI_INIT_CMD_CRC_LEN) | WSPI_INIT_CMD_END;
	/*
	 * The above is the logical order; it must actually be stored
	 * in the buffer byte-swapped.
	 */
	__swab32s((u32 *)cmd);
	__swab32s((u32 *)cmd+1);

	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);

	kfree(cmd);
}

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 (gpio_is_valid(wl->power_gpio))
		gpio_set_value(wl->power_gpio, 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 wl1251_spi_probe(struct spi_device *spi)
{
	struct wl1251_platform_data *pdata = dev_get_platdata(&spi->dev);
	struct device_node *np = spi->dev.of_node;
	struct ieee80211_hw *hw;
	struct wl1251 *wl;
	int ret;

	if (!np && !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);
	spi_set_drvdata(spi, 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;
	}

	if (np) {
		wl->use_eeprom = of_property_read_bool(np, "ti,wl1251-has-eeprom");
		wl->power_gpio = of_get_named_gpio(np, "ti,power-gpio", 0);
	} else if (pdata) {
		wl->power_gpio = pdata->power_gpio;
		wl->use_eeprom = pdata->use_eeprom;
	}

	if (wl->power_gpio == -EPROBE_DEFER) {
		ret = -EPROBE_DEFER;
		goto out_free;
	}

	if (gpio_is_valid(wl->power_gpio)) {
		ret = devm_gpio_request_one(&spi->dev, wl->power_gpio,
					GPIOF_OUT_INIT_LOW, "wl1251 power");
		if (ret) {
			wl1251_error("Failed to request gpio: %d\n", ret);
			goto out_free;
		}
	} else {
		wl1251_error("set power gpio missing in platform data");
		ret = -ENODEV;
		goto out_free;
	}

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

	irq_set_status_flags(wl->irq, IRQ_NOAUTOEN);
	ret = devm_request_irq(&spi->dev, 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);

	wl->vio = devm_regulator_get(&spi->dev, "vio");
	if (IS_ERR(wl->vio)) {
		ret = PTR_ERR(wl->vio);
		wl1251_error("vio regulator missing: %d", ret);
		goto out_free;
	}

	ret = regulator_enable(wl->vio);
	if (ret)
		goto out_free;

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

	return 0;

disable_regulator:
	regulator_disable(wl->vio);
out_free:
	ieee80211_free_hw(hw);

	return ret;
}

static int wl1251_spi_remove(struct spi_device *spi)
{
	struct wl1251 *wl = spi_get_drvdata(spi);

	wl1251_free_hw(wl);
	regulator_disable(wl->vio);

	return 0;
}

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

	.probe		= wl1251_spi_probe,
	.remove		= wl1251_spi_remove,
};

module_spi_driver(wl1251_spi_driver);

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>
e757201b	26	#include <linux/swab.h>
2f01a1f5 KV	27	#include <linux/crc7.h>
2f01a1f5 KV	28	#include <linux/spi/spi.h>
c1f9a095	29	#include <linux/wl12xx.h>
1d207cd3	30	#include <linux/gpio.h>
07bbca6f SR	31	#include <linux/of.h>
07bbca6f SR	32	#include <linux/of_gpio.h>
e4c2e09e	33	#include <linux/regulator/consumer.h>
2f01a1f5	34
13674118	35	#include "wl1251.h"
9bc6772e KV	36	#include "reg.h"
9bc6772e KV	37	#include "spi.h"
2f01a1f5	38
b5ed9c1b BC	39	static irqreturn_t wl1251_irq(int irq, void *cookie)
	40	{
	41	struct wl1251 *wl;
	42
	43	wl1251_debug(DEBUG_IRQ, "IRQ");
	44
	45	wl = cookie;
	46
16e711f9	47	ieee80211_queue_work(wl->hw, &wl->irq_work);
b5ed9c1b BC	48
	49	return IRQ_HANDLED;
	50	}
	51
af8c78eb BC	52	static struct spi_device wl_to_spi(struct wl1251 wl)
	53	{
	54	return wl->if_priv;
	55	}
	56
08d9f572	57	static void wl1251_spi_reset(struct wl1251 *wl)
2f01a1f5 KV	58	{
	59	u8 *cmd;
	60	struct spi_transfer t;
	61	struct spi_message m;
	62
	63	cmd = kzalloc(WSPI_INIT_CMD_LEN, GFP_KERNEL);
	64	if (!cmd) {
80301cdc	65	wl1251_error("could not allocate cmd for spi reset");
2f01a1f5 KV	66	return;
	67	}
	68
	69	memset(&t, 0, sizeof(t));
	70	spi_message_init(&m);
	71
	72	memset(cmd, 0xff, WSPI_INIT_CMD_LEN);
	73
	74	t.tx_buf = cmd;
	75	t.len = WSPI_INIT_CMD_LEN;
	76	spi_message_add_tail(&t, &m);
	77
af8c78eb	78	spi_sync(wl_to_spi(wl), &m);
2f01a1f5	79
80301cdc	80	wl1251_dump(DEBUG_SPI, "spi reset -> ", cmd, WSPI_INIT_CMD_LEN);
a859e4d6 GI	81
a859e4d6 GI	82	kfree(cmd);
2f01a1f5 KV	83	}
2f01a1f5 KV	84
8e639c06	85	static void wl1251_spi_wake(struct wl1251 *wl)
2f01a1f5	86	{
2f01a1f5 KV	87	struct spi_transfer t;
2f01a1f5 KV	88	struct spi_message m;
e757201b	89	u8 *cmd = kzalloc(WSPI_INIT_CMD_LEN, GFP_KERNEL);
2f01a1f5	90
2f01a1f5	91	if (!cmd) {
80301cdc	92	wl1251_error("could not allocate cmd for spi init");
2f01a1f5 KV	93	return;
	94	}
	95
2f01a1f5 KV	96	memset(&t, 0, sizeof(t));
	97	spi_message_init(&m);
	98
789e90e5	99	/* Set WSPI_INIT_COMMAND
2f01a1f5 KV	100	* the data is being send from the MSB to LSB
2f01a1f5 KV	101	*/
e757201b GS	102	cmd[0] = 0xff;
	103	cmd[1] = 0xff;
	104	cmd[2] = WSPI_INIT_CMD_START \| WSPI_INIT_CMD_TX;
	105	cmd[3] = 0;
	106	cmd[4] = 0;
	107	cmd[5] = HW_ACCESS_WSPI_INIT_CMD_MASK << 3;
	108	cmd[5] \|= HW_ACCESS_WSPI_FIXED_BUSY_LEN & WSPI_INIT_CMD_FIXEDBUSY_LEN;
	109
	110	cmd[6] = WSPI_INIT_CMD_IOD \| WSPI_INIT_CMD_IP \| WSPI_INIT_CMD_CS
	111	\| WSPI_INIT_CMD_WSPI \| WSPI_INIT_CMD_WS;
2f01a1f5 KV	112
2f01a1f5 KV	113	if (HW_ACCESS_WSPI_FIXED_BUSY_LEN == 0)
e757201b	114	cmd[6] \|= WSPI_INIT_CMD_DIS_FIXEDBUSY;
2f01a1f5	115	else
e757201b	116	cmd[6] \|= WSPI_INIT_CMD_EN_FIXEDBUSY;
2f01a1f5	117
e757201b GS	118	cmd[7] = crc7_be(0, cmd+2, WSPI_INIT_CMD_CRC_LEN) \| WSPI_INIT_CMD_END;
	119	/*
	120	* The above is the logical order; it must actually be stored
	121	* in the buffer byte-swapped.
	122	*/
	123	__swab32s((u32 *)cmd);
	124	__swab32s((u32 *)cmd+1);
2f01a1f5 KV	125
	126	t.tx_buf = cmd;
	127	t.len = WSPI_INIT_CMD_LEN;
	128	spi_message_add_tail(&t, &m);
	129
af8c78eb	130	spi_sync(wl_to_spi(wl), &m);
2f01a1f5	131
80301cdc	132	wl1251_dump(DEBUG_SPI, "spi init -> ", cmd, WSPI_INIT_CMD_LEN);
a859e4d6 GI	133
a859e4d6 GI	134	kfree(cmd);
2f01a1f5 KV	135	}
2f01a1f5 KV	136
08d9f572 BC	137	static void wl1251_spi_reset_wake(struct wl1251 *wl)
	138	{
	139	wl1251_spi_reset(wl);
8e639c06	140	wl1251_spi_wake(wl);
08d9f572 BC	141	}
08d9f572 BC	142
08d9f572 BC	143	static void wl1251_spi_read(struct wl1251 wl, int addr, void buf,
08d9f572 BC	144	size_t len)
2f01a1f5 KV	145	{
	146	struct spi_transfer t[3];
	147	struct spi_message m;
5262c12d	148	u8 *busy_buf;
56343a3c	149	u32 *cmd;
2f01a1f5	150
56343a3c	151	cmd = &wl->buffer_cmd;
5262c12d	152	busy_buf = wl->buffer_busyword;
56343a3c KV	153
	154	*cmd = 0;
	155	*cmd \|= WSPI_CMD_READ;
	156	*cmd \|= (len << WSPI_CMD_BYTE_LENGTH_OFFSET) & WSPI_CMD_BYTE_LENGTH;
	157	*cmd \|= addr & WSPI_CMD_BYTE_ADDR;
2f01a1f5 KV	158
	159	spi_message_init(&m);
	160	memset(t, 0, sizeof(t));
	161
56343a3c	162	t[0].tx_buf = cmd;
2f01a1f5 KV	163	t[0].len = 4;
	164	spi_message_add_tail(&t[0], &m);
	165
	166	/* Busy and non busy words read */
	167	t[1].rx_buf = busy_buf;
80301cdc	168	t[1].len = WL1251_BUSY_WORD_LEN;
2f01a1f5 KV	169	spi_message_add_tail(&t[1], &m);
	170
	171	t[2].rx_buf = buf;
	172	t[2].len = len;
	173	spi_message_add_tail(&t[2], &m);
	174
af8c78eb	175	spi_sync(wl_to_spi(wl), &m);
2f01a1f5 KV	176
	177	/* FIXME: check busy words */
	178
80301cdc KV	179	wl1251_dump(DEBUG_SPI, "spi_read cmd -> ", cmd, sizeof(*cmd));
80301cdc KV	180	wl1251_dump(DEBUG_SPI, "spi_read buf <- ", buf, len);
2f01a1f5 KV	181	}
2f01a1f5 KV	182
08d9f572 BC	183	static void wl1251_spi_write(struct wl1251 wl, int addr, void buf,
08d9f572 BC	184	size_t len)
2f01a1f5 KV	185	{
	186	struct spi_transfer t[2];
	187	struct spi_message m;
56343a3c	188	u32 *cmd;
2f01a1f5	189
56343a3c KV	190	cmd = &wl->buffer_cmd;
	191
	192	*cmd = 0;
	193	*cmd \|= WSPI_CMD_WRITE;
	194	*cmd \|= (len << WSPI_CMD_BYTE_LENGTH_OFFSET) & WSPI_CMD_BYTE_LENGTH;
	195	*cmd \|= addr & WSPI_CMD_BYTE_ADDR;
2f01a1f5 KV	196
	197	spi_message_init(&m);
	198	memset(t, 0, sizeof(t));
	199
56343a3c KV	200	t[0].tx_buf = cmd;
56343a3c KV	201	t[0].len = sizeof(*cmd);
2f01a1f5 KV	202	spi_message_add_tail(&t[0], &m);
	203
	204	t[1].tx_buf = buf;
	205	t[1].len = len;
	206	spi_message_add_tail(&t[1], &m);
	207
af8c78eb	208	spi_sync(wl_to_spi(wl), &m);
2f01a1f5	209
80301cdc KV	210	wl1251_dump(DEBUG_SPI, "spi_write cmd -> ", cmd, sizeof(*cmd));
80301cdc KV	211	wl1251_dump(DEBUG_SPI, "spi_write buf -> ", buf, len);
2f01a1f5	212	}
08d9f572	213
b5ed9c1b BC	214	static void wl1251_spi_enable_irq(struct wl1251 *wl)
	215	{
	216	return enable_irq(wl->irq);
	217	}
	218
	219	static void wl1251_spi_disable_irq(struct wl1251 *wl)
	220	{
	221	return disable_irq(wl->irq);
	222	}
	223
cb7bbc7a GI	224	static int wl1251_spi_set_power(struct wl1251 *wl, bool enable)
cb7bbc7a GI	225	{
1d207cd3 SR	226	if (gpio_is_valid(wl->power_gpio))
1d207cd3 SR	227	gpio_set_value(wl->power_gpio, enable);
cb7bbc7a GI	228
	229	return 0;
	230	}
	231
af8c78eb	232	static const struct wl1251_if_operations wl1251_spi_ops = {
08d9f572 BC	233	.read = wl1251_spi_read,
	234	.write = wl1251_spi_write,
	235	.reset = wl1251_spi_reset_wake,
b5ed9c1b BC	236	.enable_irq = wl1251_spi_enable_irq,
b5ed9c1b BC	237	.disable_irq = wl1251_spi_disable_irq,
cb7bbc7a	238	.power = wl1251_spi_set_power,
08d9f572	239	};
8e639c06	240
b74324d1	241	static int wl1251_spi_probe(struct spi_device *spi)
8e639c06	242	{
07bbca6f SR	243	struct wl1251_platform_data *pdata = dev_get_platdata(&spi->dev);
07bbca6f SR	244	struct device_node *np = spi->dev.of_node;
8e639c06 BC	245	struct ieee80211_hw *hw;
	246	struct wl1251 *wl;
	247	int ret;
	248
07bbca6f	249	if (!np && !pdata) {
8e639c06 BC	250	wl1251_error("no platform data");
	251	return -ENODEV;
	252	}
	253
	254	hw = wl1251_alloc_hw();
	255	if (IS_ERR(hw))
	256	return PTR_ERR(hw);
	257
	258	wl = hw->priv;
	259
	260	SET_IEEE80211_DEV(hw, &spi->dev);
c49b05ac	261	spi_set_drvdata(spi, wl);
af8c78eb	262	wl->if_priv = spi;
8e639c06 BC	263	wl->if_ops = &wl1251_spi_ops;
	264
	265	/* This is the only SPI value that we need to set here, the rest
789e90e5 SK	266	* comes from the board-peripherals file
789e90e5 SK	267	*/
8e639c06 BC	268	spi->bits_per_word = 32;
	269
	270	ret = spi_setup(spi);
	271	if (ret < 0) {
	272	wl1251_error("spi_setup failed");
	273	goto out_free;
	274	}
	275
07bbca6f SR	276	if (np) {
	277	wl->use_eeprom = of_property_read_bool(np, "ti,wl1251-has-eeprom");
	278	wl->power_gpio = of_get_named_gpio(np, "ti,power-gpio", 0);
	279	} else if (pdata) {
	280	wl->power_gpio = pdata->power_gpio;
	281	wl->use_eeprom = pdata->use_eeprom;
	282	}
	283
	284	if (wl->power_gpio == -EPROBE_DEFER) {
	285	ret = -EPROBE_DEFER;
	286	goto out_free;
	287	}
1d207cd3 SR	288
	289	if (gpio_is_valid(wl->power_gpio)) {
	290	ret = devm_gpio_request_one(&spi->dev, wl->power_gpio,
	291	GPIOF_OUT_INIT_LOW, "wl1251 power");
	292	if (ret) {
	293	wl1251_error("Failed to request gpio: %d\n", ret);
	294	goto out_free;
	295	}
	296	} else {
	297	wl1251_error("set power gpio missing in platform data");
	298	ret = -ENODEV;
	299	goto out_free;
8e639c06 BC	300	}
	301
	302	wl->irq = spi->irq;
	303	if (wl->irq < 0) {
	304	wl1251_error("irq missing in platform data");
1d207cd3 SR	305	ret = -ENODEV;
1d207cd3 SR	306	goto out_free;
8e639c06 BC	307	}
8e639c06 BC	308
f380f2c4	309	irq_set_status_flags(wl->irq, IRQ_NOAUTOEN);
1d207cd3 SR	310	ret = devm_request_irq(&spi->dev, wl->irq, wl1251_irq, 0,
1d207cd3 SR	311	DRIVER_NAME, wl);
8e639c06 BC	312	if (ret < 0) {
	313	wl1251_error("request_irq() failed: %d", ret);
	314	goto out_free;
	315	}
	316
dced35ae	317	irq_set_irq_type(wl->irq, IRQ_TYPE_EDGE_RISING);
8e639c06	318
e4c2e09e SR	319	wl->vio = devm_regulator_get(&spi->dev, "vio");
	320	if (IS_ERR(wl->vio)) {
	321	ret = PTR_ERR(wl->vio);
	322	wl1251_error("vio regulator missing: %d", ret);
	323	goto out_free;
	324	}
	325
	326	ret = regulator_enable(wl->vio);
8e639c06	327	if (ret)
1d207cd3	328	goto out_free;
8e639c06	329
e4c2e09e SR	330	ret = wl1251_init_ieee80211(wl);
	331	if (ret)
	332	goto disable_regulator;
	333
8e639c06 BC	334	return 0;
8e639c06 BC	335
e4c2e09e SR	336	disable_regulator:
	337	regulator_disable(wl->vio);
	338	out_free:
8e639c06 BC	339	ieee80211_free_hw(hw);
	340
	341	return ret;
	342	}
	343
b74324d1	344	static int wl1251_spi_remove(struct spi_device *spi)
8e639c06	345	{
c49b05ac	346	struct wl1251 *wl = spi_get_drvdata(spi);
8e639c06 BC	347
8e639c06 BC	348	wl1251_free_hw(wl);
e4c2e09e	349	regulator_disable(wl->vio);
8e639c06 BC	350
	351	return 0;
	352	}
	353
	354	static struct spi_driver wl1251_spi_driver = {
	355	.driver = {
7590a550	356	.name = DRIVER_NAME,
8e639c06 BC	357	},
	358
	359	.probe = wl1251_spi_probe,
b74324d1	360	.remove = wl1251_spi_remove,
8e639c06 BC	361	};
8e639c06 BC	362
19a4e68a	363	module_spi_driver(wl1251_spi_driver);
8e639c06 BC	364
8e639c06 BC	365	MODULE_LICENSE("GPL");
31c726f0	366	MODULE_AUTHOR("Kalle Valo <kvalo@adurom.com>");
f148cfdd	367	MODULE_ALIAS("spi:wl1251");