[net-next-2.6.git] / drivers / net / wireless / wl12xx / wl1251_spi.c

/*
 * This file is part of wl1251
 *
 * Copyright (C) 2008 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/module.h>
#include <linux/crc7.h>
#include <linux/spi/spi.h>

#include "wl1251.h"
#include "reg.h"
#include "wl1251_spi.h"

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->spi, &m);

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

void wl1251_spi_init(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->spi, &m);

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

/* Set the SPI partitions to access the chip addresses
 *
 * There are two VIRTUAL (SPI) partitions (the memory partition and the
 * registers partition), which are mapped to two different areas of the
 * PHYSICAL (hardware) memory.  This function also makes other checks to
 * ensure that the partitions are not overlapping.  In the diagram below, the
 * memory partition comes before the register partition, but the opposite is
 * also supported.
 *
 *                               PHYSICAL address
 *                                     space
 *
 *                                    |    |
 *                                 ...+----+--> mem_start
 *          VIRTUAL address     ...   |    |
 *               space       ...      |    | [PART_0]
 *                        ...         |    |
 * 0x00000000 <--+----+...         ...+----+--> mem_start + mem_size
 *               |    |         ...   |    |
 *               |MEM |      ...      |    |
 *               |    |   ...         |    |
 *  part_size <--+----+...            |    | {unused area)
 *               |    |   ...         |    |
 *               |REG |      ...      |    |
 *  part_size    |    |         ...   |    |
 *      +     <--+----+...         ...+----+--> reg_start
 *  reg_size              ...         |    |
 *                           ...      |    | [PART_1]
 *                              ...   |    |
 *                                 ...+----+--> reg_start + reg_size
 *                                    |    |
 *
 */
int wl1251_set_partition(struct wl1251 *wl,
			  u32 mem_start, u32 mem_size,
			  u32 reg_start, u32 reg_size)
{
	struct wl1251_partition *partition;
	struct spi_transfer t;
	struct spi_message m;
	size_t len, cmd_len;
	u32 *cmd;
	int addr;

	cmd_len = sizeof(u32) + 2 * sizeof(struct wl1251_partition);
	cmd = kzalloc(cmd_len, GFP_KERNEL);
	if (!cmd)
		return -ENOMEM;

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

	partition = (struct wl1251_partition *) (cmd + 1);
	addr = HW_ACCESS_PART0_SIZE_ADDR;
	len = 2 * sizeof(struct wl1251_partition);

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

	wl1251_debug(DEBUG_SPI, "mem_start %08X mem_size %08X",
		     mem_start, mem_size);
	wl1251_debug(DEBUG_SPI, "reg_start %08X reg_size %08X",
		     reg_start, reg_size);

	/* Make sure that the two partitions together don't exceed the
	 * address range */
	if ((mem_size + reg_size) > HW_ACCESS_MEMORY_MAX_RANGE) {
		wl1251_debug(DEBUG_SPI, "Total size exceeds maximum virtual"
			     " address range.  Truncating partition[0].");
		mem_size = HW_ACCESS_MEMORY_MAX_RANGE - reg_size;
		wl1251_debug(DEBUG_SPI, "mem_start %08X mem_size %08X",
			     mem_start, mem_size);
		wl1251_debug(DEBUG_SPI, "reg_start %08X reg_size %08X",
			     reg_start, reg_size);
	}

	if ((mem_start < reg_start) &&
	    ((mem_start + mem_size) > reg_start)) {
		/* Guarantee that the memory partition doesn't overlap the
		 * registers partition */
		wl1251_debug(DEBUG_SPI, "End of partition[0] is "
			     "overlapping partition[1].  Adjusted.");
		mem_size = reg_start - mem_start;
		wl1251_debug(DEBUG_SPI, "mem_start %08X mem_size %08X",
			     mem_start, mem_size);
		wl1251_debug(DEBUG_SPI, "reg_start %08X reg_size %08X",
			     reg_start, reg_size);
	} else if ((reg_start < mem_start) &&
		   ((reg_start + reg_size) > mem_start)) {
		/* Guarantee that the register partition doesn't overlap the
		 * memory partition */
		wl1251_debug(DEBUG_SPI, "End of partition[1] is"
			     " overlapping partition[0].  Adjusted.");
		reg_size = mem_start - reg_start;
		wl1251_debug(DEBUG_SPI, "mem_start %08X mem_size %08X",
			     mem_start, mem_size);
		wl1251_debug(DEBUG_SPI, "reg_start %08X reg_size %08X",
			     reg_start, reg_size);
	}

	partition[0].start = mem_start;
	partition[0].size  = mem_size;
	partition[1].start = reg_start;
	partition[1].size  = reg_size;

	wl->physical_mem_addr = mem_start;
	wl->physical_reg_addr = reg_start;

	wl->virtual_mem_addr = 0;
	wl->virtual_reg_addr = mem_size;

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

	spi_sync(wl->spi, &m);

	kfree(cmd);

	return 0;
}

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->spi, &m);

	/* FIXME: check busy words */

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

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->spi, &m);

	wl1251_dump(DEBUG_SPI, "spi_write cmd -> ", cmd, sizeof(*cmd));
	wl1251_dump(DEBUG_SPI, "spi_write buf -> ", buf, len);
}
Commit	Line	Data
2f01a1f5	1	/*
80301cdc	2	* This file is part of wl1251
2f01a1f5 KV	3	*
	4	* Copyright (C) 2008 Nokia Corporation
	5	*
	6	* Contact: Kalle Valo <kalle.valo@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
	24	#include <linux/module.h>
	25	#include <linux/crc7.h>
	26	#include <linux/spi/spi.h>
	27
13674118	28	#include "wl1251.h"
2f01a1f5	29	#include "reg.h"
ef2f8d45	30	#include "wl1251_spi.h"
2f01a1f5	31
80301cdc	32	void wl1251_spi_reset(struct wl1251 *wl)
2f01a1f5 KV	33	{
	34	u8 *cmd;
	35	struct spi_transfer t;
	36	struct spi_message m;
	37
	38	cmd = kzalloc(WSPI_INIT_CMD_LEN, GFP_KERNEL);
	39	if (!cmd) {
80301cdc	40	wl1251_error("could not allocate cmd for spi reset");
2f01a1f5 KV	41	return;
	42	}
	43
	44	memset(&t, 0, sizeof(t));
	45	spi_message_init(&m);
	46
	47	memset(cmd, 0xff, WSPI_INIT_CMD_LEN);
	48
	49	t.tx_buf = cmd;
	50	t.len = WSPI_INIT_CMD_LEN;
	51	spi_message_add_tail(&t, &m);
	52
	53	spi_sync(wl->spi, &m);
	54
80301cdc	55	wl1251_dump(DEBUG_SPI, "spi reset -> ", cmd, WSPI_INIT_CMD_LEN);
2f01a1f5 KV	56	}
2f01a1f5 KV	57
80301cdc	58	void wl1251_spi_init(struct wl1251 *wl)
2f01a1f5 KV	59	{
	60	u8 crc[WSPI_INIT_CMD_CRC_LEN], *cmd;
	61	struct spi_transfer t;
	62	struct spi_message m;
	63
	64	cmd = kzalloc(WSPI_INIT_CMD_LEN, GFP_KERNEL);
	65	if (!cmd) {
80301cdc	66	wl1251_error("could not allocate cmd for spi init");
2f01a1f5 KV	67	return;
	68	}
	69
	70	memset(crc, 0, sizeof(crc));
	71	memset(&t, 0, sizeof(t));
	72	spi_message_init(&m);
	73
	74	/*
	75	* Set WSPI_INIT_COMMAND
	76	* the data is being send from the MSB to LSB
	77	*/
	78	cmd[2] = 0xff;
	79	cmd[3] = 0xff;
	80	cmd[1] = WSPI_INIT_CMD_START \| WSPI_INIT_CMD_TX;
	81	cmd[0] = 0;
	82	cmd[7] = 0;
	83	cmd[6] \|= HW_ACCESS_WSPI_INIT_CMD_MASK << 3;
	84	cmd[6] \|= HW_ACCESS_WSPI_FIXED_BUSY_LEN & WSPI_INIT_CMD_FIXEDBUSY_LEN;
	85
	86	if (HW_ACCESS_WSPI_FIXED_BUSY_LEN == 0)
	87	cmd[5] \|= WSPI_INIT_CMD_DIS_FIXEDBUSY;
	88	else
	89	cmd[5] \|= WSPI_INIT_CMD_EN_FIXEDBUSY;
	90
	91	cmd[5] \|= WSPI_INIT_CMD_IOD \| WSPI_INIT_CMD_IP \| WSPI_INIT_CMD_CS
	92	\| WSPI_INIT_CMD_WSPI \| WSPI_INIT_CMD_WS;
	93
	94	crc[0] = cmd[1];
	95	crc[1] = cmd[0];
	96	crc[2] = cmd[7];
	97	crc[3] = cmd[6];
	98	crc[4] = cmd[5];
	99
	100	cmd[4] \|= crc7(0, crc, WSPI_INIT_CMD_CRC_LEN) << 1;
	101	cmd[4] \|= WSPI_INIT_CMD_END;
	102
	103	t.tx_buf = cmd;
	104	t.len = WSPI_INIT_CMD_LEN;
	105	spi_message_add_tail(&t, &m);
	106
	107	spi_sync(wl->spi, &m);
	108
80301cdc	109	wl1251_dump(DEBUG_SPI, "spi init -> ", cmd, WSPI_INIT_CMD_LEN);
2f01a1f5 KV	110	}
	111
	112	/* Set the SPI partitions to access the chip addresses
	113	*
	114	* There are two VIRTUAL (SPI) partitions (the memory partition and the
	115	* registers partition), which are mapped to two different areas of the
	116	* PHYSICAL (hardware) memory. This function also makes other checks to
	117	* ensure that the partitions are not overlapping. In the diagram below, the
	118	* memory partition comes before the register partition, but the opposite is
	119	* also supported.
	120	*
	121	* PHYSICAL address
	122	* space
	123	*
	124	* \| \|
	125	* ...+----+--> mem_start
	126	* VIRTUAL address ... \| \|
	127	* space ... \| \| [PART_0]
	128	* ... \| \|
	129	* 0x00000000 <--+----+... ...+----+--> mem_start + mem_size
	130	* \| \| ... \| \|
	131	* \|MEM \| ... \| \|
	132	* \| \| ... \| \|
	133	* part_size <--+----+... \| \| {unused area)
	134	* \| \| ... \| \|
	135	* \|REG \| ... \| \|
	136	* part_size \| \| ... \| \|
	137	* + <--+----+... ...+----+--> reg_start
	138	* reg_size ... \| \|
	139	* ... \| \| [PART_1]
	140	* ... \| \|
	141	* ...+----+--> reg_start + reg_size
	142	* \| \|
	143	*
	144	*/
80301cdc	145	int wl1251_set_partition(struct wl1251 *wl,
2f01a1f5 KV	146	u32 mem_start, u32 mem_size,
	147	u32 reg_start, u32 reg_size)
	148	{
80301cdc	149	struct wl1251_partition *partition;
2f01a1f5 KV	150	struct spi_transfer t;
2f01a1f5 KV	151	struct spi_message m;
8d47cdb6	152	size_t len, cmd_len;
2f01a1f5	153	u32 *cmd;
2f01a1f5 KV	154	int addr;
2f01a1f5 KV	155
80301cdc	156	cmd_len = sizeof(u32) + 2 * sizeof(struct wl1251_partition);
8d47cdb6 KV	157	cmd = kzalloc(cmd_len, GFP_KERNEL);
	158	if (!cmd)
	159	return -ENOMEM;
	160
2f01a1f5 KV	161	spi_message_init(&m);
2f01a1f5 KV	162	memset(&t, 0, sizeof(t));
2f01a1f5	163
80301cdc	164	partition = (struct wl1251_partition *) (cmd + 1);
2f01a1f5	165	addr = HW_ACCESS_PART0_SIZE_ADDR;
80301cdc	166	len = 2 * sizeof(struct wl1251_partition);
2f01a1f5 KV	167
	168	*cmd \|= WSPI_CMD_WRITE;
	169	*cmd \|= (len << WSPI_CMD_BYTE_LENGTH_OFFSET) & WSPI_CMD_BYTE_LENGTH;
	170	*cmd \|= addr & WSPI_CMD_BYTE_ADDR;
	171
80301cdc	172	wl1251_debug(DEBUG_SPI, "mem_start %08X mem_size %08X",
2f01a1f5	173	mem_start, mem_size);
80301cdc	174	wl1251_debug(DEBUG_SPI, "reg_start %08X reg_size %08X",
2f01a1f5 KV	175	reg_start, reg_size);
	176
	177	/* Make sure that the two partitions together don't exceed the
	178	* address range */
	179	if ((mem_size + reg_size) > HW_ACCESS_MEMORY_MAX_RANGE) {
80301cdc	180	wl1251_debug(DEBUG_SPI, "Total size exceeds maximum virtual"
2f01a1f5 KV	181	" address range. Truncating partition[0].");
2f01a1f5 KV	182	mem_size = HW_ACCESS_MEMORY_MAX_RANGE - reg_size;
80301cdc	183	wl1251_debug(DEBUG_SPI, "mem_start %08X mem_size %08X",
2f01a1f5	184	mem_start, mem_size);
80301cdc	185	wl1251_debug(DEBUG_SPI, "reg_start %08X reg_size %08X",
2f01a1f5 KV	186	reg_start, reg_size);
	187	}
	188
	189	if ((mem_start < reg_start) &&
	190	((mem_start + mem_size) > reg_start)) {
	191	/* Guarantee that the memory partition doesn't overlap the
	192	* registers partition */
80301cdc	193	wl1251_debug(DEBUG_SPI, "End of partition[0] is "
2f01a1f5 KV	194	"overlapping partition[1]. Adjusted.");
2f01a1f5 KV	195	mem_size = reg_start - mem_start;
80301cdc	196	wl1251_debug(DEBUG_SPI, "mem_start %08X mem_size %08X",
2f01a1f5	197	mem_start, mem_size);
80301cdc	198	wl1251_debug(DEBUG_SPI, "reg_start %08X reg_size %08X",
2f01a1f5 KV	199	reg_start, reg_size);
	200	} else if ((reg_start < mem_start) &&
	201	((reg_start + reg_size) > mem_start)) {
	202	/* Guarantee that the register partition doesn't overlap the
	203	* memory partition */
80301cdc	204	wl1251_debug(DEBUG_SPI, "End of partition[1] is"
2f01a1f5 KV	205	" overlapping partition[0]. Adjusted.");
2f01a1f5 KV	206	reg_size = mem_start - reg_start;
80301cdc	207	wl1251_debug(DEBUG_SPI, "mem_start %08X mem_size %08X",
2f01a1f5	208	mem_start, mem_size);
80301cdc	209	wl1251_debug(DEBUG_SPI, "reg_start %08X reg_size %08X",
2f01a1f5 KV	210	reg_start, reg_size);
	211	}
	212
	213	partition[0].start = mem_start;
	214	partition[0].size = mem_size;
	215	partition[1].start = reg_start;
	216	partition[1].size = reg_size;
	217
	218	wl->physical_mem_addr = mem_start;
	219	wl->physical_reg_addr = reg_start;
	220
	221	wl->virtual_mem_addr = 0;
	222	wl->virtual_reg_addr = mem_size;
	223
8d47cdb6 KV	224	t.tx_buf = cmd;
8d47cdb6 KV	225	t.len = cmd_len;
2f01a1f5 KV	226	spi_message_add_tail(&t, &m);
	227
	228	spi_sync(wl->spi, &m);
8d47cdb6 KV	229
	230	kfree(cmd);
	231
	232	return 0;
2f01a1f5 KV	233	}
2f01a1f5 KV	234
b8010790	235	void wl1251_spi_read(struct wl1251 wl, int addr, void buf, size_t len)
2f01a1f5 KV	236	{
	237	struct spi_transfer t[3];
	238	struct spi_message m;
5262c12d	239	u8 *busy_buf;
56343a3c	240	u32 *cmd;
2f01a1f5	241
56343a3c	242	cmd = &wl->buffer_cmd;
5262c12d	243	busy_buf = wl->buffer_busyword;
56343a3c KV	244
	245	*cmd = 0;
	246	*cmd \|= WSPI_CMD_READ;
	247	*cmd \|= (len << WSPI_CMD_BYTE_LENGTH_OFFSET) & WSPI_CMD_BYTE_LENGTH;
	248	*cmd \|= addr & WSPI_CMD_BYTE_ADDR;
2f01a1f5 KV	249
	250	spi_message_init(&m);
	251	memset(t, 0, sizeof(t));
	252
56343a3c	253	t[0].tx_buf = cmd;
2f01a1f5 KV	254	t[0].len = 4;
	255	spi_message_add_tail(&t[0], &m);
	256
	257	/* Busy and non busy words read */
	258	t[1].rx_buf = busy_buf;
80301cdc	259	t[1].len = WL1251_BUSY_WORD_LEN;
2f01a1f5 KV	260	spi_message_add_tail(&t[1], &m);
	261
	262	t[2].rx_buf = buf;
	263	t[2].len = len;
	264	spi_message_add_tail(&t[2], &m);
	265
	266	spi_sync(wl->spi, &m);
	267
	268	/* FIXME: check busy words */
	269
80301cdc KV	270	wl1251_dump(DEBUG_SPI, "spi_read cmd -> ", cmd, sizeof(*cmd));
80301cdc KV	271	wl1251_dump(DEBUG_SPI, "spi_read buf <- ", buf, len);
2f01a1f5 KV	272	}
2f01a1f5 KV	273
b8010790	274	void wl1251_spi_write(struct wl1251 wl, int addr, void buf, size_t len)
2f01a1f5 KV	275	{
	276	struct spi_transfer t[2];
	277	struct spi_message m;
56343a3c	278	u32 *cmd;
2f01a1f5	279
56343a3c KV	280	cmd = &wl->buffer_cmd;
	281
	282	*cmd = 0;
	283	*cmd \|= WSPI_CMD_WRITE;
	284	*cmd \|= (len << WSPI_CMD_BYTE_LENGTH_OFFSET) & WSPI_CMD_BYTE_LENGTH;
	285	*cmd \|= addr & WSPI_CMD_BYTE_ADDR;
2f01a1f5 KV	286
	287	spi_message_init(&m);
	288	memset(t, 0, sizeof(t));
	289
56343a3c KV	290	t[0].tx_buf = cmd;
56343a3c KV	291	t[0].len = sizeof(*cmd);
2f01a1f5 KV	292	spi_message_add_tail(&t[0], &m);
	293
	294	t[1].tx_buf = buf;
	295	t[1].len = len;
	296	spi_message_add_tail(&t[1], &m);
	297
	298	spi_sync(wl->spi, &m);
	299
80301cdc KV	300	wl1251_dump(DEBUG_SPI, "spi_write cmd -> ", cmd, sizeof(*cmd));
80301cdc KV	301	wl1251_dump(DEBUG_SPI, "spi_write buf -> ", buf, len);
2f01a1f5	302	}