[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/crc7.h>
#include <linux/spi/spi.h>
#include <linux/spi/wl12xx.h>
#include <linux/slab.h>

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

#include "wl1271_reg.h"

#define WSPI_CMD_READ                 0x40000000
#define WSPI_CMD_WRITE                0x00000000
#define WSPI_CMD_FIXED                0x20000000
#define WSPI_CMD_BYTE_LENGTH          0x1FFE0000
#define WSPI_CMD_BYTE_LENGTH_OFFSET   17
#define WSPI_CMD_BYTE_ADDR            0x0001FFFF

#define WSPI_INIT_CMD_CRC_LEN       5

#define WSPI_INIT_CMD_START         0x00
#define WSPI_INIT_CMD_TX            0x40
/* the extra bypass bit is sampled by the TNET as '1' */
#define WSPI_INIT_CMD_BYPASS_BIT    0x80
#define WSPI_INIT_CMD_FIXEDBUSY_LEN 0x07
#define WSPI_INIT_CMD_EN_FIXEDBUSY  0x80
#define WSPI_INIT_CMD_DIS_FIXEDBUSY 0x00
#define WSPI_INIT_CMD_IOD           0x40
#define WSPI_INIT_CMD_IP            0x20
#define WSPI_INIT_CMD_CS            0x10
#define WSPI_INIT_CMD_WS            0x08
#define WSPI_INIT_CMD_WSPI          0x01
#define WSPI_INIT_CMD_END           0x01

#define WSPI_INIT_CMD_LEN           8

#define HW_ACCESS_WSPI_FIXED_BUSY_LEN \
		((WL1271_BUSY_WORD_LEN - 4) / sizeof(u32))
#define HW_ACCESS_WSPI_INIT_CMD_MASK  0

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);
}

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

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

static 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);
	kfree(cmd);

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

static 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);
	kfree(cmd);

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

#define WL1271_BUSY_WORD_TIMEOUT 1000

static int wl1271_spi_read_busy(struct wl1271 *wl)
{
	struct spi_transfer t[1];
	struct spi_message m;
	u32 *busy_buf;
	int num_busy_bytes = 0;

	/*
	 * Read further busy words from SPI until a non-busy word is
	 * encountered, then read the data itself into the buffer.
	 */

	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);
		t[0].cs_change = true;
		spi_message_add_tail(&t[0], &m);
		spi_sync(wl_to_spi(wl), &m);

		if (*busy_buf & 0x1)
			return 0;
	}

	/* The SPI bus is unresponsive, the read failed. */
	wl1271_error("SPI read busy-word timeout!\n");
	return -ETIMEDOUT;
}

static 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;
	t[0].cs_change = true;
	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;
	t[1].cs_change = true;
	spi_message_add_tail(&t[1], &m);

	spi_sync(wl_to_spi(wl), &m);

	if (!(busy_buf[WL1271_BUSY_WORD_CNT - 1] & 0x1) &&
	    wl1271_spi_read_busy(wl)) {
		memset(buf, 0, len);
		return;
	}

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

	t[0].rx_buf = buf;
	t[0].len = len;
	t[0].cs_change = true;
	spi_message_add_tail(&t[0], &m);

	spi_sync(wl_to_spi(wl), &m);

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

static 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;
	}

	if (!test_and_set_bit(WL1271_FLAG_IRQ_RUNNING, &wl->flags))
		ieee80211_queue_work(wl->hw, &wl->irq_work);
	set_bit(WL1271_FLAG_IRQ_PENDING, &wl->flags);
	spin_unlock_irqrestore(&wl->wl_lock, flags);

	return IRQ_HANDLED;
}

static void wl1271_spi_set_power(struct wl1271 *wl, bool enable)
{
	if (wl->set_power)
		wl->set_power(enable);
}

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,
	.power		= wl1271_spi_set_power,
	.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 = wl1271_init_ieee80211(wl);
	if (ret)
		goto out_irq;

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

	wl1271_notice("initialized");

	return 0;

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

 out_free:
	wl1271_free_hw(wl);

	return ret;
}

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

	free_irq(wl->irq, wl);

	wl1271_unregister_hw(wl);
	wl1271_free_hw(wl);

	return 0;
}


static struct spi_driver wl1271_spi_driver = {
	.driver = {
		.name		= "wl1271_spi",
		.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);
MODULE_ALIAS("spi:wl1271");
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	25	#include <linux/module.h>
f5fc0f86 LC	26	#include <linux/crc7.h>
f5fc0f86 LC	27	#include <linux/spi/spi.h>
2d5e82b8	28	#include <linux/spi/wl12xx.h>
5a0e3ad6	29	#include <linux/slab.h>
f5fc0f86 LC	30
	31	#include "wl1271.h"
	32	#include "wl12xx_80211.h"
2d5e82b8	33	#include "wl1271_io.h"
f5fc0f86	34
760d969f TP	35	#include "wl1271_reg.h"
	36
	37	#define WSPI_CMD_READ 0x40000000
	38	#define WSPI_CMD_WRITE 0x00000000
	39	#define WSPI_CMD_FIXED 0x20000000
	40	#define WSPI_CMD_BYTE_LENGTH 0x1FFE0000
	41	#define WSPI_CMD_BYTE_LENGTH_OFFSET 17
	42	#define WSPI_CMD_BYTE_ADDR 0x0001FFFF
	43
	44	#define WSPI_INIT_CMD_CRC_LEN 5
	45
	46	#define WSPI_INIT_CMD_START 0x00
	47	#define WSPI_INIT_CMD_TX 0x40
	48	/* the extra bypass bit is sampled by the TNET as '1' */
	49	#define WSPI_INIT_CMD_BYPASS_BIT 0x80
	50	#define WSPI_INIT_CMD_FIXEDBUSY_LEN 0x07
	51	#define WSPI_INIT_CMD_EN_FIXEDBUSY 0x80
	52	#define WSPI_INIT_CMD_DIS_FIXEDBUSY 0x00
	53	#define WSPI_INIT_CMD_IOD 0x40
	54	#define WSPI_INIT_CMD_IP 0x20
	55	#define WSPI_INIT_CMD_CS 0x10
	56	#define WSPI_INIT_CMD_WS 0x08
	57	#define WSPI_INIT_CMD_WSPI 0x01
	58	#define WSPI_INIT_CMD_END 0x01
	59
	60	#define WSPI_INIT_CMD_LEN 8
	61
	62	#define HW_ACCESS_WSPI_FIXED_BUSY_LEN \
	63	((WL1271_BUSY_WORD_LEN - 4) / sizeof(u32))
	64	#define HW_ACCESS_WSPI_INIT_CMD_MASK 0
	65
b42f91ba	66	static inline struct spi_device wl_to_spi(struct wl1271 wl)
8197b711 TP	67	{
	68	return wl->if_priv;
	69	}
	70
	71	static struct device wl1271_spi_wl_to_dev(struct wl1271 wl)
	72	{
	73	return &(wl_to_spi(wl)->dev);
	74	}
f5fc0f86	75
760d969f	76	static void wl1271_spi_disable_interrupts(struct wl1271 *wl)
54f7e503 TP	77	{
	78	disable_irq(wl->irq);
	79	}
	80
760d969f	81	static void wl1271_spi_enable_interrupts(struct wl1271 *wl)
54f7e503 TP	82	{
	83	enable_irq(wl->irq);
	84	}
	85
760d969f	86	static void wl1271_spi_reset(struct wl1271 *wl)
f5fc0f86 LC	87	{
	88	u8 *cmd;
	89	struct spi_transfer t;
	90	struct spi_message m;
	91
	92	cmd = kzalloc(WSPI_INIT_CMD_LEN, GFP_KERNEL);
	93	if (!cmd) {
	94	wl1271_error("could not allocate cmd for spi reset");
	95	return;
	96	}
	97
	98	memset(&t, 0, sizeof(t));
	99	spi_message_init(&m);
	100
	101	memset(cmd, 0xff, WSPI_INIT_CMD_LEN);
	102
	103	t.tx_buf = cmd;
	104	t.len = WSPI_INIT_CMD_LEN;
	105	spi_message_add_tail(&t, &m);
	106
8197b711	107	spi_sync(wl_to_spi(wl), &m);
f83cce35	108	kfree(cmd);
f5fc0f86 LC	109
	110	wl1271_dump(DEBUG_SPI, "spi reset -> ", cmd, WSPI_INIT_CMD_LEN);
	111	}
	112
760d969f	113	static void wl1271_spi_init(struct wl1271 *wl)
f5fc0f86 LC	114	{
	115	u8 crc[WSPI_INIT_CMD_CRC_LEN], *cmd;
	116	struct spi_transfer t;
	117	struct spi_message m;
	118
	119	cmd = kzalloc(WSPI_INIT_CMD_LEN, GFP_KERNEL);
	120	if (!cmd) {
	121	wl1271_error("could not allocate cmd for spi init");
	122	return;
	123	}
	124
	125	memset(crc, 0, sizeof(crc));
	126	memset(&t, 0, sizeof(t));
	127	spi_message_init(&m);
	128
	129	/*
	130	* Set WSPI_INIT_COMMAND
	131	* the data is being send from the MSB to LSB
	132	*/
	133	cmd[2] = 0xff;
	134	cmd[3] = 0xff;
	135	cmd[1] = WSPI_INIT_CMD_START \| WSPI_INIT_CMD_TX;
	136	cmd[0] = 0;
	137	cmd[7] = 0;
	138	cmd[6] \|= HW_ACCESS_WSPI_INIT_CMD_MASK << 3;
	139	cmd[6] \|= HW_ACCESS_WSPI_FIXED_BUSY_LEN & WSPI_INIT_CMD_FIXEDBUSY_LEN;
	140
	141	if (HW_ACCESS_WSPI_FIXED_BUSY_LEN == 0)
	142	cmd[5] \|= WSPI_INIT_CMD_DIS_FIXEDBUSY;
	143	else
	144	cmd[5] \|= WSPI_INIT_CMD_EN_FIXEDBUSY;
	145
	146	cmd[5] \|= WSPI_INIT_CMD_IOD \| WSPI_INIT_CMD_IP \| WSPI_INIT_CMD_CS
	147	\| WSPI_INIT_CMD_WSPI \| WSPI_INIT_CMD_WS;
	148
	149	crc[0] = cmd[1];
	150	crc[1] = cmd[0];
	151	crc[2] = cmd[7];
	152	crc[3] = cmd[6];
	153	crc[4] = cmd[5];
	154
	155	cmd[4] \|= crc7(0, crc, WSPI_INIT_CMD_CRC_LEN) << 1;
	156	cmd[4] \|= WSPI_INIT_CMD_END;
	157
	158	t.tx_buf = cmd;
	159	t.len = WSPI_INIT_CMD_LEN;
	160	spi_message_add_tail(&t, &m);
	161
8197b711	162	spi_sync(wl_to_spi(wl), &m);
f83cce35	163	kfree(cmd);
f5fc0f86 LC	164
	165	wl1271_dump(DEBUG_SPI, "spi init -> ", cmd, WSPI_INIT_CMD_LEN);
	166	}
	167
545f1da8 JO	168	#define WL1271_BUSY_WORD_TIMEOUT 1000
545f1da8 JO	169
259da430	170	static int wl1271_spi_read_busy(struct wl1271 *wl)
545f1da8 JO	171	{
	172	struct spi_transfer t[1];
	173	struct spi_message m;
	174	u32 *busy_buf;
	175	int num_busy_bytes = 0;
	176
545f1da8 JO	177	/*
	178	* Read further busy words from SPI until a non-busy word is
	179	* encountered, then read the data itself into the buffer.
	180	*/
545f1da8 JO	181
	182	num_busy_bytes = WL1271_BUSY_WORD_TIMEOUT;
	183	busy_buf = wl->buffer_busyword;
	184	while (num_busy_bytes) {
	185	num_busy_bytes--;
	186	spi_message_init(&m);
	187	memset(t, 0, sizeof(t));
	188	t[0].rx_buf = busy_buf;
	189	t[0].len = sizeof(u32);
259da430	190	t[0].cs_change = true;
545f1da8	191	spi_message_add_tail(&t[0], &m);
8197b711	192	spi_sync(wl_to_spi(wl), &m);
545f1da8	193
259da430 JO	194	if (*busy_buf & 0x1)
259da430 JO	195	return 0;
545f1da8 JO	196	}
	197
	198	/* The SPI bus is unresponsive, the read failed. */
545f1da8	199	wl1271_error("SPI read busy-word timeout!\n");
259da430	200	return -ETIMEDOUT;
545f1da8 JO	201	}
545f1da8 JO	202
760d969f	203	static void wl1271_spi_raw_read(struct wl1271 wl, int addr, void buf,
259da430	204	size_t len, bool fixed)
f5fc0f86 LC	205	{
	206	struct spi_transfer t[3];
	207	struct spi_message m;
545f1da8	208	u32 *busy_buf;
f5fc0f86 LC	209	u32 *cmd;
	210
	211	cmd = &wl->buffer_cmd;
	212	busy_buf = wl->buffer_busyword;
	213
	214	*cmd = 0;
	215	*cmd \|= WSPI_CMD_READ;
	216	*cmd \|= (len << WSPI_CMD_BYTE_LENGTH_OFFSET) & WSPI_CMD_BYTE_LENGTH;
	217	*cmd \|= addr & WSPI_CMD_BYTE_ADDR;
	218
	219	if (fixed)
	220	*cmd \|= WSPI_CMD_FIXED;
	221
	222	spi_message_init(&m);
	223	memset(t, 0, sizeof(t));
	224
	225	t[0].tx_buf = cmd;
	226	t[0].len = 4;
259da430	227	t[0].cs_change = true;
f5fc0f86 LC	228	spi_message_add_tail(&t[0], &m);
	229
	230	/* Busy and non busy words read */
	231	t[1].rx_buf = busy_buf;
	232	t[1].len = WL1271_BUSY_WORD_LEN;
259da430	233	t[1].cs_change = true;
f5fc0f86 LC	234	spi_message_add_tail(&t[1], &m);
f5fc0f86 LC	235
8197b711	236	spi_sync(wl_to_spi(wl), &m);
f5fc0f86	237
259da430 JO	238	if (!(busy_buf[WL1271_BUSY_WORD_CNT - 1] & 0x1) &&
	239	wl1271_spi_read_busy(wl)) {
	240	memset(buf, 0, len);
	241	return;
	242	}
	243
	244	spi_message_init(&m);
	245	memset(t, 0, sizeof(t));
	246
	247	t[0].rx_buf = buf;
	248	t[0].len = len;
	249	t[0].cs_change = true;
	250	spi_message_add_tail(&t[0], &m);
	251
	252	spi_sync(wl_to_spi(wl), &m);
f5fc0f86 LC	253
	254	wl1271_dump(DEBUG_SPI, "spi_read cmd -> ", cmd, sizeof(*cmd));
	255	wl1271_dump(DEBUG_SPI, "spi_read buf <- ", buf, len);
	256	}
	257
760d969f	258	static void wl1271_spi_raw_write(struct wl1271 wl, int addr, void buf,
74621417	259	size_t len, bool fixed)
f5fc0f86 LC	260	{
	261	struct spi_transfer t[2];
	262	struct spi_message m;
	263	u32 *cmd;
	264
	265	cmd = &wl->buffer_cmd;
	266
	267	*cmd = 0;
	268	*cmd \|= WSPI_CMD_WRITE;
	269	*cmd \|= (len << WSPI_CMD_BYTE_LENGTH_OFFSET) & WSPI_CMD_BYTE_LENGTH;
	270	*cmd \|= addr & WSPI_CMD_BYTE_ADDR;
	271
	272	if (fixed)
	273	*cmd \|= WSPI_CMD_FIXED;
	274
	275	spi_message_init(&m);
	276	memset(t, 0, sizeof(t));
	277
	278	t[0].tx_buf = cmd;
	279	t[0].len = sizeof(*cmd);
	280	spi_message_add_tail(&t[0], &m);
	281
	282	t[1].tx_buf = buf;
	283	t[1].len = len;
	284	spi_message_add_tail(&t[1], &m);
	285
8197b711	286	spi_sync(wl_to_spi(wl), &m);
f5fc0f86 LC	287
	288	wl1271_dump(DEBUG_SPI, "spi_write cmd -> ", cmd, sizeof(*cmd));
	289	wl1271_dump(DEBUG_SPI, "spi_write buf -> ", buf, len);
	290	}
2d5e82b8 TP	291
	292	static irqreturn_t wl1271_irq(int irq, void *cookie)
	293	{
	294	struct wl1271 *wl;
	295	unsigned long flags;
	296
	297	wl1271_debug(DEBUG_IRQ, "IRQ");
	298
	299	wl = cookie;
	300
	301	/* complete the ELP completion */
	302	spin_lock_irqsave(&wl->wl_lock, flags);
	303	if (wl->elp_compl) {
	304	complete(wl->elp_compl);
	305	wl->elp_compl = NULL;
	306	}
	307
1e73eb62 JO	308	if (!test_and_set_bit(WL1271_FLAG_IRQ_RUNNING, &wl->flags))
	309	ieee80211_queue_work(wl->hw, &wl->irq_work);
	310	set_bit(WL1271_FLAG_IRQ_PENDING, &wl->flags);
2d5e82b8 TP	311	spin_unlock_irqrestore(&wl->wl_lock, flags);
	312
	313	return IRQ_HANDLED;
	314	}
	315
becd551c TP	316	static void wl1271_spi_set_power(struct wl1271 *wl, bool enable)
	317	{
	318	if (wl->set_power)
	319	wl->set_power(enable);
	320	}
	321
8197b711 TP	322	static struct wl1271_if_operations spi_ops = {
	323	.read = wl1271_spi_raw_read,
	324	.write = wl1271_spi_raw_write,
	325	.reset = wl1271_spi_reset,
	326	.init = wl1271_spi_init,
becd551c	327	.power = wl1271_spi_set_power,
8197b711 TP	328	.dev = wl1271_spi_wl_to_dev,
	329	.enable_irq = wl1271_spi_enable_interrupts,
	330	.disable_irq = wl1271_spi_disable_interrupts
	331	};
	332
2d5e82b8 TP	333	static int __devinit wl1271_probe(struct spi_device *spi)
	334	{
	335	struct wl12xx_platform_data *pdata;
	336	struct ieee80211_hw *hw;
	337	struct wl1271 *wl;
	338	int ret;
	339
	340	pdata = spi->dev.platform_data;
	341	if (!pdata) {
	342	wl1271_error("no platform data");
	343	return -ENODEV;
	344	}
	345
	346	hw = wl1271_alloc_hw();
	347	if (IS_ERR(hw))
	348	return PTR_ERR(hw);
	349
	350	wl = hw->priv;
	351
	352	dev_set_drvdata(&spi->dev, wl);
8197b711 TP	353	wl->if_priv = spi;
	354
	355	wl->if_ops = &spi_ops;
2d5e82b8 TP	356
	357	/* This is the only SPI value that we need to set here, the rest
	358	* comes from the board-peripherals file */
	359	spi->bits_per_word = 32;
	360
	361	ret = spi_setup(spi);
	362	if (ret < 0) {
	363	wl1271_error("spi_setup failed");
	364	goto out_free;
	365	}
	366
	367	wl->set_power = pdata->set_power;
	368	if (!wl->set_power) {
	369	wl1271_error("set power function missing in platform data");
	370	ret = -ENODEV;
	371	goto out_free;
	372	}
	373
	374	wl->irq = spi->irq;
	375	if (wl->irq < 0) {
	376	wl1271_error("irq missing in platform data");
	377	ret = -ENODEV;
	378	goto out_free;
	379	}
	380
	381	ret = request_irq(wl->irq, wl1271_irq, 0, DRIVER_NAME, wl);
	382	if (ret < 0) {
	383	wl1271_error("request_irq() failed: %d", ret);
	384	goto out_free;
	385	}
	386
	387	set_irq_type(wl->irq, IRQ_TYPE_EDGE_RISING);
	388
	389	disable_irq(wl->irq);
	390
2d5e82b8 TP	391	ret = wl1271_init_ieee80211(wl);
2d5e82b8 TP	392	if (ret)
a1dd8187	393	goto out_irq;
2d5e82b8 TP	394
	395	ret = wl1271_register_hw(wl);
	396	if (ret)
a1dd8187	397	goto out_irq;
2d5e82b8 TP	398
	399	wl1271_notice("initialized");
	400
	401	return 0;
	402
2d5e82b8 TP	403	out_irq:
	404	free_irq(wl->irq, wl);
	405
	406	out_free:
3b56dd6a	407	wl1271_free_hw(wl);
2d5e82b8 TP	408
	409	return ret;
	410	}
	411
	412	static int __devexit wl1271_remove(struct spi_device *spi)
	413	{
	414	struct wl1271 *wl = dev_get_drvdata(&spi->dev);
	415
2d5e82b8 TP	416	free_irq(wl->irq, wl);
2d5e82b8 TP	417
3b56dd6a	418	wl1271_unregister_hw(wl);
2d5e82b8 TP	419	wl1271_free_hw(wl);
	420
	421	return 0;
	422	}
	423
	424
	425	static struct spi_driver wl1271_spi_driver = {
	426	.driver = {
7fdd50d0	427	.name = "wl1271_spi",
2d5e82b8 TP	428	.bus = &spi_bus_type,
	429	.owner = THIS_MODULE,
	430	},
	431
	432	.probe = wl1271_probe,
	433	.remove = __devexit_p(wl1271_remove),
	434	};
	435
	436	static int __init wl1271_init(void)
	437	{
	438	int ret;
	439
	440	ret = spi_register_driver(&wl1271_spi_driver);
	441	if (ret < 0) {
	442	wl1271_error("failed to register spi driver: %d", ret);
	443	goto out;
	444	}
	445
	446	out:
	447	return ret;
	448	}
	449
	450	static void __exit wl1271_exit(void)
	451	{
	452	spi_unregister_driver(&wl1271_spi_driver);
	453
	454	wl1271_notice("unloaded");
	455	}
	456
	457	module_init(wl1271_init);
	458	module_exit(wl1271_exit);
	459
	460	MODULE_LICENSE("GPL");
	461	MODULE_AUTHOR("Luciano Coelho <luciano.coelho@nokia.com>");
	462	MODULE_AUTHOR("Juuso Oikarinen <juuso.oikarinen@nokia.com>");
	463	MODULE_FIRMWARE(WL1271_FW_NAME);
f148cfdd	464	MODULE_ALIAS("spi:wl1271");