[deliverable/linux.git] / drivers / net / wireless / wl12xx / wl1271_spi.c

/*
 * This file is part of wl1271
 *
 * Copyright (C) 2008-2009 Nokia Corporation
 *
 * Contact: Luciano Coelho <luciano.coelho@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/irq.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/crc7.h>
#include <linux/spi/spi.h>
#include <linux/spi/wl12xx.h>

#include "wl1271.h"
#include "wl12xx_80211.h"
#include "wl1271_spi.h"
#include "wl1271_io.h"

static inline struct spi_device *wl_to_spi(struct wl1271 *wl)
{
	return wl->if_priv;
}

static struct device *wl1271_spi_wl_to_dev(struct wl1271 *wl)
{
	return &(wl_to_spi(wl)->dev);
}

void wl1271_spi_disable_interrupts(struct wl1271 *wl)
{
	disable_irq(wl->irq);
}

void wl1271_spi_enable_interrupts(struct wl1271 *wl)
{
	enable_irq(wl->irq);
}

void wl1271_spi_reset(struct wl1271 *wl)
{
	u8 *cmd;
	struct spi_transfer t;
	struct spi_message m;

	cmd = kzalloc(WSPI_INIT_CMD_LEN, GFP_KERNEL);
	if (!cmd) {
		wl1271_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);

	wl1271_dump(DEBUG_SPI, "spi reset -> ", cmd, WSPI_INIT_CMD_LEN);
}

void wl1271_spi_init(struct wl1271 *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) {
		wl1271_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);

	wl1271_dump(DEBUG_SPI, "spi init -> ", cmd, WSPI_INIT_CMD_LEN);
}

#define WL1271_BUSY_WORD_TIMEOUT 1000

/* FIXME: Check busy words, removed due to SPI bug */
#if 0
static void wl1271_spi_read_busy(struct wl1271 *wl, void *buf, size_t len)
{
	struct spi_transfer t[1];
	struct spi_message m;
	u32 *busy_buf;
	int num_busy_bytes = 0;

	wl1271_info("spi read BUSY!");

	/*
	 * Look for the non-busy word in the read buffer, and if found,
	 * read in the remaining data into the buffer.
	 */
	busy_buf = (u32 *)buf;
	for (; (u32)busy_buf < (u32)buf + len; busy_buf++) {
		num_busy_bytes += sizeof(u32);
		if (*busy_buf & 0x1) {
			spi_message_init(&m);
			memset(t, 0, sizeof(t));
			memmove(buf, busy_buf, len - num_busy_bytes);
			t[0].rx_buf = buf + (len - num_busy_bytes);
			t[0].len = num_busy_bytes;
			spi_message_add_tail(&t[0], &m);
			spi_sync(wl_to_spi(wl), &m);
			return;
		}
	}

	/*
	 * Read further busy words from SPI until a non-busy word is
	 * encountered, then read the data itself into the buffer.
	 */
	wl1271_info("spi read BUSY-polling needed!");

	num_busy_bytes = WL1271_BUSY_WORD_TIMEOUT;
	busy_buf = wl->buffer_busyword;
	while (num_busy_bytes) {
		num_busy_bytes--;
		spi_message_init(&m);
		memset(t, 0, sizeof(t));
		t[0].rx_buf = busy_buf;
		t[0].len = sizeof(u32);
		spi_message_add_tail(&t[0], &m);
		spi_sync(wl_to_spi(wl), &m);

		if (*busy_buf & 0x1) {
			spi_message_init(&m);
			memset(t, 0, sizeof(t));
			t[0].rx_buf = buf;
			t[0].len = len;
			spi_message_add_tail(&t[0], &m);
			spi_sync(wl_to_spi(wl), &m);
			return;
		}
	}

	/* The SPI bus is unresponsive, the read failed. */
	memset(buf, 0, len);
	wl1271_error("SPI read busy-word timeout!\n");
}
#endif

void wl1271_spi_raw_read(struct wl1271 *wl, int addr, void *buf,
			 size_t len, bool fixed)
{
	struct spi_transfer t[3];
	struct spi_message m;
	u32 *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;

	if (fixed)
		*cmd |= WSPI_CMD_FIXED;

	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 = WL1271_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, removed due to SPI bug */
	/* if (!(busy_buf[WL1271_BUSY_WORD_CNT - 1] & 0x1))
	   wl1271_spi_read_busy(wl, buf, len); */

	wl1271_dump(DEBUG_SPI, "spi_read cmd -> ", cmd, sizeof(*cmd));
	wl1271_dump(DEBUG_SPI, "spi_read buf <- ", buf, len);
}

void wl1271_spi_raw_write(struct wl1271 *wl, int addr, void *buf,
			  size_t len, bool fixed)
{
	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;

	if (fixed)
		*cmd |= WSPI_CMD_FIXED;

	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);

	wl1271_dump(DEBUG_SPI, "spi_write cmd -> ", cmd, sizeof(*cmd));
	wl1271_dump(DEBUG_SPI, "spi_write buf -> ", buf, len);
}

static irqreturn_t wl1271_irq(int irq, void *cookie)
{
	struct wl1271 *wl;
	unsigned long flags;

	wl1271_debug(DEBUG_IRQ, "IRQ");

	wl = cookie;

	/* complete the ELP completion */
	spin_lock_irqsave(&wl->wl_lock, flags);
	if (wl->elp_compl) {
		complete(wl->elp_compl);
		wl->elp_compl = NULL;
	}

	ieee80211_queue_work(wl->hw, &wl->irq_work);
	spin_unlock_irqrestore(&wl->wl_lock, flags);

	return IRQ_HANDLED;
}

static void wl1271_device_release(struct device *dev)
{

}

static struct platform_device wl1271_device = {
	.name           = "wl1271",
	.id             = -1,

	/* device model insists to have a release function */
	.dev            = {
		.release = wl1271_device_release,
	},
};

static struct wl1271_if_operations spi_ops = {
	.read		= wl1271_spi_raw_read,
	.write		= wl1271_spi_raw_write,
	.reset		= wl1271_spi_reset,
	.init		= wl1271_spi_init,
	.dev		= wl1271_spi_wl_to_dev,
	.enable_irq	= wl1271_spi_enable_interrupts,
	.disable_irq	= wl1271_spi_disable_interrupts
};

static int __devinit wl1271_probe(struct spi_device *spi)
{
	struct wl12xx_platform_data *pdata;
	struct ieee80211_hw *hw;
	struct wl1271 *wl;
	int ret;

	pdata = spi->dev.platform_data;
	if (!pdata) {
		wl1271_error("no platform data");
		return -ENODEV;
	}

	hw = wl1271_alloc_hw();
	if (IS_ERR(hw))
		return PTR_ERR(hw);

	wl = hw->priv;

	dev_set_drvdata(&spi->dev, wl);
	wl->if_priv = spi;

	wl->if_ops = &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) {
		wl1271_error("spi_setup failed");
		goto out_free;
	}

	wl->set_power = pdata->set_power;
	if (!wl->set_power) {
		wl1271_error("set power function missing in platform data");
		ret = -ENODEV;
		goto out_free;
	}

	wl->irq = spi->irq;
	if (wl->irq < 0) {
		wl1271_error("irq missing in platform data");
		ret = -ENODEV;
		goto out_free;
	}

	ret = request_irq(wl->irq, wl1271_irq, 0, DRIVER_NAME, wl);
	if (ret < 0) {
		wl1271_error("request_irq() failed: %d", ret);
		goto out_free;
	}

	set_irq_type(wl->irq, IRQ_TYPE_EDGE_RISING);

	disable_irq(wl->irq);

	ret = platform_device_register(&wl1271_device);
	if (ret) {
		wl1271_error("couldn't register platform device");
		goto out_irq;
	}
	dev_set_drvdata(&wl1271_device.dev, wl);

	ret = wl1271_init_ieee80211(wl);
	if (ret)
		goto out_platform;

	ret = wl1271_register_hw(wl);
	if (ret)
		goto out_platform;

	wl1271_notice("initialized");

	return 0;

 out_platform:
	platform_device_unregister(&wl1271_device);

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

 out_free:
	ieee80211_free_hw(hw);

	return ret;
}

static int __devexit wl1271_remove(struct spi_device *spi)
{
	struct wl1271 *wl = dev_get_drvdata(&spi->dev);

	platform_device_unregister(&wl1271_device);
	free_irq(wl->irq, wl);

	wl1271_free_hw(wl);

	return 0;
}


static struct spi_driver wl1271_spi_driver = {
	.driver = {
		.name		= "wl1271",
		.bus		= &spi_bus_type,
		.owner		= THIS_MODULE,
	},

	.probe		= wl1271_probe,
	.remove		= __devexit_p(wl1271_remove),
};

static int __init wl1271_init(void)
{
	int ret;

	ret = spi_register_driver(&wl1271_spi_driver);
	if (ret < 0) {
		wl1271_error("failed to register spi driver: %d", ret);
		goto out;
	}

out:
	return ret;
}

static void __exit wl1271_exit(void)
{
	spi_unregister_driver(&wl1271_spi_driver);

	wl1271_notice("unloaded");
}

module_init(wl1271_init);
module_exit(wl1271_exit);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Luciano Coelho <luciano.coelho@nokia.com>");
MODULE_AUTHOR("Juuso Oikarinen <juuso.oikarinen@nokia.com>");
MODULE_FIRMWARE(WL1271_FW_NAME);
Commit	Line	Data
f5fc0f86 LC	1	/*
	2	* This file is part of wl1271
	3	*
	4	* Copyright (C) 2008-2009 Nokia Corporation
	5	*
	6	* Contact: Luciano Coelho <luciano.coelho@nokia.com>
	7	*
	8	* This program is free software; you can redistribute it and/or
	9	* modify it under the terms of the GNU General Public License
	10	* version 2 as published by the Free Software Foundation.
	11	*
	12	* This program is distributed in the hope that it will be useful, but
	13	* WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	15	* General Public License for more details.
	16	*
	17	* You should have received a copy of the GNU General Public License
	18	* along with this program; if not, write to the Free Software
	19	* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
	20	* 02110-1301 USA
	21	*
	22	*/
	23
2d5e82b8	24	#include <linux/irq.h>
f5fc0f86 LC	25	#include <linux/module.h>
	26	#include <linux/platform_device.h>
	27	#include <linux/crc7.h>
	28	#include <linux/spi/spi.h>
2d5e82b8	29	#include <linux/spi/wl12xx.h>
f5fc0f86 LC	30
	31	#include "wl1271.h"
	32	#include "wl12xx_80211.h"
	33	#include "wl1271_spi.h"
2d5e82b8	34	#include "wl1271_io.h"
f5fc0f86	35
b42f91ba	36	static inline struct spi_device wl_to_spi(struct wl1271 wl)
8197b711 TP	37	{
	38	return wl->if_priv;
	39	}
	40
	41	static struct device wl1271_spi_wl_to_dev(struct wl1271 wl)
	42	{
	43	return &(wl_to_spi(wl)->dev);
	44	}
f5fc0f86	45
54f7e503 TP	46	void wl1271_spi_disable_interrupts(struct wl1271 *wl)
	47	{
	48	disable_irq(wl->irq);
	49	}
	50
	51	void wl1271_spi_enable_interrupts(struct wl1271 *wl)
	52	{
	53	enable_irq(wl->irq);
	54	}
	55
f5fc0f86 LC	56	void wl1271_spi_reset(struct wl1271 *wl)
	57	{
	58	u8 *cmd;
	59	struct spi_transfer t;
	60	struct spi_message m;
	61
	62	cmd = kzalloc(WSPI_INIT_CMD_LEN, GFP_KERNEL);
	63	if (!cmd) {
	64	wl1271_error("could not allocate cmd for spi reset");
	65	return;
	66	}
	67
	68	memset(&t, 0, sizeof(t));
	69	spi_message_init(&m);
	70
	71	memset(cmd, 0xff, WSPI_INIT_CMD_LEN);
	72
	73	t.tx_buf = cmd;
	74	t.len = WSPI_INIT_CMD_LEN;
	75	spi_message_add_tail(&t, &m);
	76
8197b711	77	spi_sync(wl_to_spi(wl), &m);
f5fc0f86 LC	78
	79	wl1271_dump(DEBUG_SPI, "spi reset -> ", cmd, WSPI_INIT_CMD_LEN);
	80	}
	81
	82	void wl1271_spi_init(struct wl1271 *wl)
	83	{
	84	u8 crc[WSPI_INIT_CMD_CRC_LEN], *cmd;
	85	struct spi_transfer t;
	86	struct spi_message m;
	87
	88	cmd = kzalloc(WSPI_INIT_CMD_LEN, GFP_KERNEL);
	89	if (!cmd) {
	90	wl1271_error("could not allocate cmd for spi init");
	91	return;
	92	}
	93
	94	memset(crc, 0, sizeof(crc));
	95	memset(&t, 0, sizeof(t));
	96	spi_message_init(&m);
	97
	98	/*
	99	* Set WSPI_INIT_COMMAND
	100	* the data is being send from the MSB to LSB
	101	*/
	102	cmd[2] = 0xff;
	103	cmd[3] = 0xff;
	104	cmd[1] = WSPI_INIT_CMD_START \| WSPI_INIT_CMD_TX;
	105	cmd[0] = 0;
	106	cmd[7] = 0;
	107	cmd[6] \|= HW_ACCESS_WSPI_INIT_CMD_MASK << 3;
	108	cmd[6] \|= HW_ACCESS_WSPI_FIXED_BUSY_LEN & WSPI_INIT_CMD_FIXEDBUSY_LEN;
	109
	110	if (HW_ACCESS_WSPI_FIXED_BUSY_LEN == 0)
	111	cmd[5] \|= WSPI_INIT_CMD_DIS_FIXEDBUSY;
	112	else
	113	cmd[5] \|= WSPI_INIT_CMD_EN_FIXEDBUSY;
	114
	115	cmd[5] \|= WSPI_INIT_CMD_IOD \| WSPI_INIT_CMD_IP \| WSPI_INIT_CMD_CS
	116	\| WSPI_INIT_CMD_WSPI \| WSPI_INIT_CMD_WS;
	117
	118	crc[0] = cmd[1];
	119	crc[1] = cmd[0];
	120	crc[2] = cmd[7];
	121	crc[3] = cmd[6];
	122	crc[4] = cmd[5];
	123
	124	cmd[4] \|= crc7(0, crc, WSPI_INIT_CMD_CRC_LEN) << 1;
	125	cmd[4] \|= WSPI_INIT_CMD_END;
	126
	127	t.tx_buf = cmd;
	128	t.len = WSPI_INIT_CMD_LEN;
	129	spi_message_add_tail(&t, &m);
	130
8197b711	131	spi_sync(wl_to_spi(wl), &m);
f5fc0f86 LC	132
	133	wl1271_dump(DEBUG_SPI, "spi init -> ", cmd, WSPI_INIT_CMD_LEN);
	134	}
	135
545f1da8 JO	136	#define WL1271_BUSY_WORD_TIMEOUT 1000
545f1da8 JO	137
938e30c9 LC	138	/* FIXME: Check busy words, removed due to SPI bug */
	139	#if 0
	140	static void wl1271_spi_read_busy(struct wl1271 wl, void buf, size_t len)
545f1da8 JO	141	{
	142	struct spi_transfer t[1];
	143	struct spi_message m;
	144	u32 *busy_buf;
	145	int num_busy_bytes = 0;
	146
	147	wl1271_info("spi read BUSY!");
	148
	149	/*
	150	* Look for the non-busy word in the read buffer, and if found,
	151	* read in the remaining data into the buffer.
	152	*/
	153	busy_buf = (u32 *)buf;
	154	for (; (u32)busy_buf < (u32)buf + len; busy_buf++) {
	155	num_busy_bytes += sizeof(u32);
	156	if (*busy_buf & 0x1) {
	157	spi_message_init(&m);
	158	memset(t, 0, sizeof(t));
	159	memmove(buf, busy_buf, len - num_busy_bytes);
	160	t[0].rx_buf = buf + (len - num_busy_bytes);
	161	t[0].len = num_busy_bytes;
	162	spi_message_add_tail(&t[0], &m);
8197b711	163	spi_sync(wl_to_spi(wl), &m);
545f1da8 JO	164	return;
	165	}
	166	}
	167
	168	/*
	169	* Read further busy words from SPI until a non-busy word is
	170	* encountered, then read the data itself into the buffer.
	171	*/
	172	wl1271_info("spi read BUSY-polling needed!");
	173
	174	num_busy_bytes = WL1271_BUSY_WORD_TIMEOUT;
	175	busy_buf = wl->buffer_busyword;
	176	while (num_busy_bytes) {
	177	num_busy_bytes--;
	178	spi_message_init(&m);
	179	memset(t, 0, sizeof(t));
	180	t[0].rx_buf = busy_buf;
	181	t[0].len = sizeof(u32);
	182	spi_message_add_tail(&t[0], &m);
8197b711	183	spi_sync(wl_to_spi(wl), &m);
545f1da8 JO	184
	185	if (*busy_buf & 0x1) {
	186	spi_message_init(&m);
	187	memset(t, 0, sizeof(t));
	188	t[0].rx_buf = buf;
	189	t[0].len = len;
	190	spi_message_add_tail(&t[0], &m);
8197b711	191	spi_sync(wl_to_spi(wl), &m);
545f1da8 JO	192	return;
	193	}
	194	}
	195
	196	/* The SPI bus is unresponsive, the read failed. */
	197	memset(buf, 0, len);
	198	wl1271_error("SPI read busy-word timeout!\n");
	199	}
938e30c9	200	#endif
545f1da8	201
74621417 JO	202	void wl1271_spi_raw_read(struct wl1271 wl, int addr, void buf,
74621417 JO	203	size_t len, bool fixed)
f5fc0f86 LC	204	{
	205	struct spi_transfer t[3];
	206	struct spi_message m;
545f1da8	207	u32 *busy_buf;
f5fc0f86 LC	208	u32 *cmd;
	209
	210	cmd = &wl->buffer_cmd;
	211	busy_buf = wl->buffer_busyword;
	212
	213	*cmd = 0;
	214	*cmd \|= WSPI_CMD_READ;
	215	*cmd \|= (len << WSPI_CMD_BYTE_LENGTH_OFFSET) & WSPI_CMD_BYTE_LENGTH;
	216	*cmd \|= addr & WSPI_CMD_BYTE_ADDR;
	217
	218	if (fixed)
	219	*cmd \|= WSPI_CMD_FIXED;
	220
	221	spi_message_init(&m);
	222	memset(t, 0, sizeof(t));
	223
	224	t[0].tx_buf = cmd;
	225	t[0].len = 4;
	226	spi_message_add_tail(&t[0], &m);
	227
	228	/* Busy and non busy words read */
	229	t[1].rx_buf = busy_buf;
	230	t[1].len = WL1271_BUSY_WORD_LEN;
	231	spi_message_add_tail(&t[1], &m);
	232
	233	t[2].rx_buf = buf;
	234	t[2].len = len;
	235	spi_message_add_tail(&t[2], &m);
	236
8197b711	237	spi_sync(wl_to_spi(wl), &m);
f5fc0f86	238
c6d5d06e JO	239	/* FIXME: Check busy words, removed due to SPI bug */
	240	/* if (!(busy_buf[WL1271_BUSY_WORD_CNT - 1] & 0x1))
	241	wl1271_spi_read_busy(wl, buf, len); */
f5fc0f86 LC	242
	243	wl1271_dump(DEBUG_SPI, "spi_read cmd -> ", cmd, sizeof(*cmd));
	244	wl1271_dump(DEBUG_SPI, "spi_read buf <- ", buf, len);
	245	}
	246
74621417 JO	247	void wl1271_spi_raw_write(struct wl1271 wl, int addr, void buf,
74621417 JO	248	size_t len, bool fixed)
f5fc0f86 LC	249	{
	250	struct spi_transfer t[2];
	251	struct spi_message m;
	252	u32 *cmd;
	253
	254	cmd = &wl->buffer_cmd;
	255
	256	*cmd = 0;
	257	*cmd \|= WSPI_CMD_WRITE;
	258	*cmd \|= (len << WSPI_CMD_BYTE_LENGTH_OFFSET) & WSPI_CMD_BYTE_LENGTH;
	259	*cmd \|= addr & WSPI_CMD_BYTE_ADDR;
	260
	261	if (fixed)
	262	*cmd \|= WSPI_CMD_FIXED;
	263
	264	spi_message_init(&m);
	265	memset(t, 0, sizeof(t));
	266
	267	t[0].tx_buf = cmd;
	268	t[0].len = sizeof(*cmd);
	269	spi_message_add_tail(&t[0], &m);
	270
	271	t[1].tx_buf = buf;
	272	t[1].len = len;
	273	spi_message_add_tail(&t[1], &m);
	274
8197b711	275	spi_sync(wl_to_spi(wl), &m);
f5fc0f86 LC	276
	277	wl1271_dump(DEBUG_SPI, "spi_write cmd -> ", cmd, sizeof(*cmd));
	278	wl1271_dump(DEBUG_SPI, "spi_write buf -> ", buf, len);
	279	}
2d5e82b8 TP	280
	281	static irqreturn_t wl1271_irq(int irq, void *cookie)
	282	{
	283	struct wl1271 *wl;
	284	unsigned long flags;
	285
	286	wl1271_debug(DEBUG_IRQ, "IRQ");
	287
	288	wl = cookie;
	289
	290	/* complete the ELP completion */
	291	spin_lock_irqsave(&wl->wl_lock, flags);
	292	if (wl->elp_compl) {
	293	complete(wl->elp_compl);
	294	wl->elp_compl = NULL;
	295	}
	296
	297	ieee80211_queue_work(wl->hw, &wl->irq_work);
	298	spin_unlock_irqrestore(&wl->wl_lock, flags);
	299
	300	return IRQ_HANDLED;
	301	}
	302
	303	static void wl1271_device_release(struct device *dev)
	304	{
	305
	306	}
	307
	308	static struct platform_device wl1271_device = {
	309	.name = "wl1271",
	310	.id = -1,
	311
	312	/* device model insists to have a release function */
	313	.dev = {
	314	.release = wl1271_device_release,
	315	},
	316	};
	317
8197b711 TP	318	static struct wl1271_if_operations spi_ops = {
	319	.read = wl1271_spi_raw_read,
	320	.write = wl1271_spi_raw_write,
	321	.reset = wl1271_spi_reset,
	322	.init = wl1271_spi_init,
	323	.dev = wl1271_spi_wl_to_dev,
	324	.enable_irq = wl1271_spi_enable_interrupts,
	325	.disable_irq = wl1271_spi_disable_interrupts
	326	};
	327
2d5e82b8 TP	328	static int __devinit wl1271_probe(struct spi_device *spi)
	329	{
	330	struct wl12xx_platform_data *pdata;
	331	struct ieee80211_hw *hw;
	332	struct wl1271 *wl;
	333	int ret;
	334
	335	pdata = spi->dev.platform_data;
	336	if (!pdata) {
	337	wl1271_error("no platform data");
	338	return -ENODEV;
	339	}
	340
	341	hw = wl1271_alloc_hw();
	342	if (IS_ERR(hw))
	343	return PTR_ERR(hw);
	344
	345	wl = hw->priv;
	346
	347	dev_set_drvdata(&spi->dev, wl);
8197b711 TP	348	wl->if_priv = spi;
	349
	350	wl->if_ops = &spi_ops;
2d5e82b8 TP	351
	352	/* This is the only SPI value that we need to set here, the rest
	353	* comes from the board-peripherals file */
	354	spi->bits_per_word = 32;
	355
	356	ret = spi_setup(spi);
	357	if (ret < 0) {
	358	wl1271_error("spi_setup failed");
	359	goto out_free;
	360	}
	361
	362	wl->set_power = pdata->set_power;
	363	if (!wl->set_power) {
	364	wl1271_error("set power function missing in platform data");
	365	ret = -ENODEV;
	366	goto out_free;
	367	}
	368
	369	wl->irq = spi->irq;
	370	if (wl->irq < 0) {
	371	wl1271_error("irq missing in platform data");
	372	ret = -ENODEV;
	373	goto out_free;
	374	}
	375
	376	ret = request_irq(wl->irq, wl1271_irq, 0, DRIVER_NAME, wl);
	377	if (ret < 0) {
	378	wl1271_error("request_irq() failed: %d", ret);
	379	goto out_free;
	380	}
	381
	382	set_irq_type(wl->irq, IRQ_TYPE_EDGE_RISING);
	383
	384	disable_irq(wl->irq);
	385
	386	ret = platform_device_register(&wl1271_device);
	387	if (ret) {
	388	wl1271_error("couldn't register platform device");
	389	goto out_irq;
	390	}
	391	dev_set_drvdata(&wl1271_device.dev, wl);
	392
	393	ret = wl1271_init_ieee80211(wl);
	394	if (ret)
	395	goto out_platform;
	396
	397	ret = wl1271_register_hw(wl);
	398	if (ret)
	399	goto out_platform;
	400
	401	wl1271_notice("initialized");
	402
	403	return 0;
	404
	405	out_platform:
	406	platform_device_unregister(&wl1271_device);
	407
	408	out_irq:
	409	free_irq(wl->irq, wl);
	410
	411	out_free:
	412	ieee80211_free_hw(hw);
	413
	414	return ret;
415	}
416
417	static int __devexit wl1271_remove(struct spi_device *spi)
418	{
419	struct wl1271 *wl = dev_get_drvdata(&spi->dev);
420
421	platform_device_unregister(&wl1271_device);
422	free_irq(wl->irq, wl);
423
424	wl1271_free_hw(wl);
425
426	return 0;
427	}
428
429
430	static struct spi_driver wl1271_spi_driver = {
431	.driver = {
432	.name = "wl1271",
433	.bus = &spi_bus_type,
434	.owner = THIS_MODULE,
435	},
436
437	.probe = wl1271_probe,
438	.remove = __devexit_p(wl1271_remove),
439	};
440
441	static int __init wl1271_init(void)
442	{
443	int ret;
444
445	ret = spi_register_driver(&wl1271_spi_driver);
446	if (ret < 0) {
447	wl1271_error("failed to register spi driver: %d", ret);
448	goto out;
449	}
450
451	out:
452	return ret;
453	}
454
455	static void __exit wl1271_exit(void)
456	{
457	spi_unregister_driver(&wl1271_spi_driver);
458
459	wl1271_notice("unloaded");
460	}
461
462	module_init(wl1271_init);
463	module_exit(wl1271_exit);
464
465	MODULE_LICENSE("GPL");
466	MODULE_AUTHOR("Luciano Coelho <luciano.coelho@nokia.com>");
467	MODULE_AUTHOR("Juuso Oikarinen <juuso.oikarinen@nokia.com>");
468	MODULE_FIRMWARE(WL1271_FW_NAME);