[linux-block.git] / drivers / net / wireless / wl12xx / spi.c

/*
 * This file is part of wl12xx
 *
 * 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 "wl12xx.h"
#include "wl12xx_80211.h"
#include "reg.h"
#include "spi.h"
#include "ps.h"

static int wl12xx_translate_reg_addr(struct wl12xx *wl, int addr)
{
	/* If the address is lower than REGISTERS_BASE, it means that this is
	 * a chip-specific register address, so look it up in the registers
	 * table */
	if (addr < REGISTERS_BASE) {
		/* Make sure we don't go over the table */
		if (addr >= ACX_REG_TABLE_LEN) {
			wl12xx_error("address out of range (%d)", addr);
			return -EINVAL;
		}
		addr = wl->chip.acx_reg_table[addr];
	}

	return addr - wl->physical_reg_addr + wl->virtual_reg_addr;
}

static int wl12xx_translate_mem_addr(struct wl12xx *wl, int addr)
{
	return addr - wl->physical_mem_addr + wl->virtual_mem_addr;
}


void wl12xx_spi_reset(struct wl12xx *wl)
{
	u8 *cmd;
	struct spi_transfer t;
	struct spi_message m;

	cmd = kzalloc(WSPI_INIT_CMD_LEN, GFP_KERNEL);
	if (!cmd) {
		wl12xx_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);

	wl12xx_dump(DEBUG_SPI, "spi reset -> ", cmd, WSPI_INIT_CMD_LEN);
}

void wl12xx_spi_init(struct wl12xx *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) {
		wl12xx_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);

	wl12xx_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 wl12xx_set_partition(struct wl12xx *wl,
			  u32 mem_start, u32 mem_size,
			  u32 reg_start, u32 reg_size)
{
	struct wl12xx_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 wl12xx_partition);
	cmd = kzalloc(cmd_len, GFP_KERNEL);
	if (!cmd)
		return -ENOMEM;

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

	partition = (struct wl12xx_partition *) (cmd + 1);
	addr = HW_ACCESS_PART0_SIZE_ADDR;
	len = 2 * sizeof(struct wl12xx_partition);

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

	wl12xx_debug(DEBUG_SPI, "mem_start %08X mem_size %08X",
		     mem_start, mem_size);
	wl12xx_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) {
		wl12xx_debug(DEBUG_SPI, "Total size exceeds maximum virtual"
			     " address range.  Truncating partition[0].");
		mem_size = HW_ACCESS_MEMORY_MAX_RANGE - reg_size;
		wl12xx_debug(DEBUG_SPI, "mem_start %08X mem_size %08X",
			     mem_start, mem_size);
		wl12xx_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 */
		wl12xx_debug(DEBUG_SPI, "End of partition[0] is "
			     "overlapping partition[1].  Adjusted.");
		mem_size = reg_start - mem_start;
		wl12xx_debug(DEBUG_SPI, "mem_start %08X mem_size %08X",
			     mem_start, mem_size);
		wl12xx_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 */
		wl12xx_debug(DEBUG_SPI, "End of partition[1] is"
			     " overlapping partition[0].  Adjusted.");
		reg_size = mem_start - reg_start;
		wl12xx_debug(DEBUG_SPI, "mem_start %08X mem_size %08X",
			     mem_start, mem_size);
		wl12xx_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 wl12xx_spi_read(struct wl12xx *wl, int addr, void *buf,
		     size_t len)
{
	struct spi_transfer t[3];
	struct spi_message m;
	char busy_buf[TNETWIF_READ_OFFSET_BYTES];
	u32 cmd;

	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 = TNETWIF_READ_OFFSET_BYTES;
	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 */

	wl12xx_dump(DEBUG_SPI, "spi_read cmd -> ", &cmd, sizeof(cmd));
	wl12xx_dump(DEBUG_SPI, "spi_read buf <- ", buf, len);
}

void wl12xx_spi_write(struct wl12xx *wl, int addr, void *buf,
		      size_t len)
{
	struct spi_transfer t[2];
	struct spi_message m;
	u32 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);

	wl12xx_dump(DEBUG_SPI, "spi_write cmd -> ", &cmd, sizeof(cmd));
	wl12xx_dump(DEBUG_SPI, "spi_write buf -> ", buf, len);
}

void wl12xx_spi_mem_read(struct wl12xx *wl, int addr, void *buf,
			 size_t len)
{
	int physical;

	physical = wl12xx_translate_mem_addr(wl, addr);

	wl12xx_spi_read(wl, physical, buf, len);
}

void wl12xx_spi_mem_write(struct wl12xx *wl, int addr, void *buf,
			  size_t len)
{
	int physical;

	physical = wl12xx_translate_mem_addr(wl, addr);

	wl12xx_spi_write(wl, physical, buf, len);
}

u32 wl12xx_mem_read32(struct wl12xx *wl, int addr)
{
	return wl12xx_read32(wl, wl12xx_translate_mem_addr(wl, addr));
}

void wl12xx_mem_write32(struct wl12xx *wl, int addr, u32 val)
{
	wl12xx_write32(wl, wl12xx_translate_mem_addr(wl, addr), val);
}

u32 wl12xx_reg_read32(struct wl12xx *wl, int addr)
{
	return wl12xx_read32(wl, wl12xx_translate_reg_addr(wl, addr));
}

void wl12xx_reg_write32(struct wl12xx *wl, int addr, u32 val)
{
	wl12xx_write32(wl, wl12xx_translate_reg_addr(wl, addr), val);
}
Commit	Line	Data
2f01a1f5 KV	1	/*
	2	* This file is part of wl12xx
	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
	28	#include "wl12xx.h"
	29	#include "wl12xx_80211.h"
	30	#include "reg.h"
	31	#include "spi.h"
	32	#include "ps.h"
	33
	34	static int wl12xx_translate_reg_addr(struct wl12xx *wl, int addr)
	35	{
	36	/* If the address is lower than REGISTERS_BASE, it means that this is
	37	* a chip-specific register address, so look it up in the registers
	38	* table */
	39	if (addr < REGISTERS_BASE) {
	40	/* Make sure we don't go over the table */
	41	if (addr >= ACX_REG_TABLE_LEN) {
	42	wl12xx_error("address out of range (%d)", addr);
	43	return -EINVAL;
	44	}
	45	addr = wl->chip.acx_reg_table[addr];
	46	}
	47
	48	return addr - wl->physical_reg_addr + wl->virtual_reg_addr;
	49	}
	50
	51	static int wl12xx_translate_mem_addr(struct wl12xx *wl, int addr)
	52	{
	53	return addr - wl->physical_mem_addr + wl->virtual_mem_addr;
	54	}
	55
	56
	57	void wl12xx_spi_reset(struct wl12xx *wl)
	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) {
65	wl12xx_error("could not allocate cmd for spi reset");
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
78	spi_sync(wl->spi, &m);
79
80	wl12xx_dump(DEBUG_SPI, "spi reset -> ", cmd, WSPI_INIT_CMD_LEN);
81	}
82
83	void wl12xx_spi_init(struct wl12xx *wl)
84	{
85	u8 crc[WSPI_INIT_CMD_CRC_LEN], *cmd;
86	struct spi_transfer t;
87	struct spi_message m;
88
89	cmd = kzalloc(WSPI_INIT_CMD_LEN, GFP_KERNEL);
90	if (!cmd) {
91	wl12xx_error("could not allocate cmd for spi init");
92	return;
93	}
94
95	memset(crc, 0, sizeof(crc));
96	memset(&t, 0, sizeof(t));
97	spi_message_init(&m);
98
99	/*
100	* Set WSPI_INIT_COMMAND
101	* the data is being send from the MSB to LSB
102	*/
103	cmd[2] = 0xff;
104	cmd[3] = 0xff;
105	cmd[1] = WSPI_INIT_CMD_START \| WSPI_INIT_CMD_TX;
106	cmd[0] = 0;
107	cmd[7] = 0;
108	cmd[6] \|= HW_ACCESS_WSPI_INIT_CMD_MASK << 3;
109	cmd[6] \|= HW_ACCESS_WSPI_FIXED_BUSY_LEN & WSPI_INIT_CMD_FIXEDBUSY_LEN;
110
111	if (HW_ACCESS_WSPI_FIXED_BUSY_LEN == 0)
112	cmd[5] \|= WSPI_INIT_CMD_DIS_FIXEDBUSY;
113	else
114	cmd[5] \|= WSPI_INIT_CMD_EN_FIXEDBUSY;
115
116	cmd[5] \|= WSPI_INIT_CMD_IOD \| WSPI_INIT_CMD_IP \| WSPI_INIT_CMD_CS
117	\| WSPI_INIT_CMD_WSPI \| WSPI_INIT_CMD_WS;
118
119	crc[0] = cmd[1];
120	crc[1] = cmd[0];
121	crc[2] = cmd[7];
122	crc[3] = cmd[6];
123	crc[4] = cmd[5];
124
125	cmd[4] \|= crc7(0, crc, WSPI_INIT_CMD_CRC_LEN) << 1;
126	cmd[4] \|= WSPI_INIT_CMD_END;
127
128	t.tx_buf = cmd;
129	t.len = WSPI_INIT_CMD_LEN;
130	spi_message_add_tail(&t, &m);
131
132	spi_sync(wl->spi, &m);
133
134	wl12xx_dump(DEBUG_SPI, "spi init -> ", cmd, WSPI_INIT_CMD_LEN);
135	}
136
137	/* Set the SPI partitions to access the chip addresses
138	*
139	* There are two VIRTUAL (SPI) partitions (the memory partition and the
140	* registers partition), which are mapped to two different areas of the
141	* PHYSICAL (hardware) memory. This function also makes other checks to
142	* ensure that the partitions are not overlapping. In the diagram below, the
143	* memory partition comes before the register partition, but the opposite is
144	* also supported.
145	*
146	* PHYSICAL address
147	* space
148	*
149	* \| \|
150	* ...+----+--> mem_start
151	* VIRTUAL address ... \| \|
152	* space ... \| \| [PART_0]
153	* ... \| \|
154	* 0x00000000 <--+----+... ...+----+--> mem_start + mem_size
155	* \| \| ... \| \|
156	* \|MEM \| ... \| \|
157	* \| \| ... \| \|
158	* part_size <--+----+... \| \| {unused area)
159	* \| \| ... \| \|
160	* \|REG \| ... \| \|
161	* part_size \| \| ... \| \|
162	* + <--+----+... ...+----+--> reg_start
163	* reg_size ... \| \|
164	* ... \| \| [PART_1]
165	* ... \| \|
166	* ...+----+--> reg_start + reg_size
167	* \| \|
168	*
169	*/
8d47cdb6	170	int wl12xx_set_partition(struct wl12xx *wl,
2f01a1f5 KV	171	u32 mem_start, u32 mem_size,
	172	u32 reg_start, u32 reg_size)
	173	{
2f01a1f5 KV	174	struct wl12xx_partition *partition;
	175	struct spi_transfer t;
	176	struct spi_message m;
8d47cdb6	177	size_t len, cmd_len;
2f01a1f5	178	u32 *cmd;
2f01a1f5 KV	179	int addr;
2f01a1f5 KV	180
8d47cdb6 KV	181	cmd_len = sizeof(u32) + 2 * sizeof(struct wl12xx_partition);
	182	cmd = kzalloc(cmd_len, GFP_KERNEL);
	183	if (!cmd)
	184	return -ENOMEM;
	185
2f01a1f5 KV	186	spi_message_init(&m);
2f01a1f5 KV	187	memset(&t, 0, sizeof(t));
2f01a1f5	188
8d47cdb6	189	partition = (struct wl12xx_partition *) (cmd + 1);
2f01a1f5 KV	190	addr = HW_ACCESS_PART0_SIZE_ADDR;
	191	len = 2 * sizeof(struct wl12xx_partition);
	192
	193	*cmd \|= WSPI_CMD_WRITE;
	194	*cmd \|= (len << WSPI_CMD_BYTE_LENGTH_OFFSET) & WSPI_CMD_BYTE_LENGTH;
	195	*cmd \|= addr & WSPI_CMD_BYTE_ADDR;
	196
	197	wl12xx_debug(DEBUG_SPI, "mem_start %08X mem_size %08X",
	198	mem_start, mem_size);
	199	wl12xx_debug(DEBUG_SPI, "reg_start %08X reg_size %08X",
	200	reg_start, reg_size);
	201
	202	/* Make sure that the two partitions together don't exceed the
	203	* address range */
	204	if ((mem_size + reg_size) > HW_ACCESS_MEMORY_MAX_RANGE) {
	205	wl12xx_debug(DEBUG_SPI, "Total size exceeds maximum virtual"
	206	" address range. Truncating partition[0].");
	207	mem_size = HW_ACCESS_MEMORY_MAX_RANGE - reg_size;
	208	wl12xx_debug(DEBUG_SPI, "mem_start %08X mem_size %08X",
	209	mem_start, mem_size);
	210	wl12xx_debug(DEBUG_SPI, "reg_start %08X reg_size %08X",
	211	reg_start, reg_size);
	212	}
	213
	214	if ((mem_start < reg_start) &&
	215	((mem_start + mem_size) > reg_start)) {
	216	/* Guarantee that the memory partition doesn't overlap the
	217	* registers partition */
	218	wl12xx_debug(DEBUG_SPI, "End of partition[0] is "
	219	"overlapping partition[1]. Adjusted.");
	220	mem_size = reg_start - mem_start;
	221	wl12xx_debug(DEBUG_SPI, "mem_start %08X mem_size %08X",
	222	mem_start, mem_size);
	223	wl12xx_debug(DEBUG_SPI, "reg_start %08X reg_size %08X",
	224	reg_start, reg_size);
	225	} else if ((reg_start < mem_start) &&
	226	((reg_start + reg_size) > mem_start)) {
	227	/* Guarantee that the register partition doesn't overlap the
	228	* memory partition */
	229	wl12xx_debug(DEBUG_SPI, "End of partition[1] is"
	230	" overlapping partition[0]. Adjusted.");
	231	reg_size = mem_start - reg_start;
	232	wl12xx_debug(DEBUG_SPI, "mem_start %08X mem_size %08X",
	233	mem_start, mem_size);
	234	wl12xx_debug(DEBUG_SPI, "reg_start %08X reg_size %08X",
	235	reg_start, reg_size);
	236	}
	237
	238	partition[0].start = mem_start;
	239	partition[0].size = mem_size;
	240	partition[1].start = reg_start;
	241	partition[1].size = reg_size;
	242
	243	wl->physical_mem_addr = mem_start;
	244	wl->physical_reg_addr = reg_start;
	245
	246	wl->virtual_mem_addr = 0;
	247	wl->virtual_reg_addr = mem_size;
	248
8d47cdb6 KV	249	t.tx_buf = cmd;
8d47cdb6 KV	250	t.len = cmd_len;
2f01a1f5 KV	251	spi_message_add_tail(&t, &m);
	252
	253	spi_sync(wl->spi, &m);
8d47cdb6 KV	254
	255	kfree(cmd);
	256
	257	return 0;
2f01a1f5 KV	258	}
	259
	260	void wl12xx_spi_read(struct wl12xx wl, int addr, void buf,
	261	size_t len)
	262	{
	263	struct spi_transfer t[3];
	264	struct spi_message m;
	265	char busy_buf[TNETWIF_READ_OFFSET_BYTES];
	266	u32 cmd;
	267
	268	cmd = 0;
	269	cmd \|= WSPI_CMD_READ;
	270	cmd \|= (len << WSPI_CMD_BYTE_LENGTH_OFFSET) & WSPI_CMD_BYTE_LENGTH;
	271	cmd \|= addr & WSPI_CMD_BYTE_ADDR;
	272
	273	spi_message_init(&m);
	274	memset(t, 0, sizeof(t));
	275
	276	t[0].tx_buf = &cmd;
	277	t[0].len = 4;
	278	spi_message_add_tail(&t[0], &m);
	279
	280	/* Busy and non busy words read */
	281	t[1].rx_buf = busy_buf;
	282	t[1].len = TNETWIF_READ_OFFSET_BYTES;
	283	spi_message_add_tail(&t[1], &m);
	284
	285	t[2].rx_buf = buf;
	286	t[2].len = len;
	287	spi_message_add_tail(&t[2], &m);
	288
	289	spi_sync(wl->spi, &m);
	290
	291	/* FIXME: check busy words */
	292
	293	wl12xx_dump(DEBUG_SPI, "spi_read cmd -> ", &cmd, sizeof(cmd));
	294	wl12xx_dump(DEBUG_SPI, "spi_read buf <- ", buf, len);
	295	}
	296
	297	void wl12xx_spi_write(struct wl12xx wl, int addr, void buf,
	298	size_t len)
	299	{
	300	struct spi_transfer t[2];
	301	struct spi_message m;
	302	u32 cmd;
	303
	304	cmd = 0;
	305	cmd \|= WSPI_CMD_WRITE;
	306	cmd \|= (len << WSPI_CMD_BYTE_LENGTH_OFFSET) & WSPI_CMD_BYTE_LENGTH;
	307	cmd \|= addr & WSPI_CMD_BYTE_ADDR;
	308
	309	spi_message_init(&m);
	310	memset(t, 0, sizeof(t));
	311
	312	t[0].tx_buf = &cmd;
	313	t[0].len = sizeof(cmd);
	314	spi_message_add_tail(&t[0], &m);
	315
	316	t[1].tx_buf = buf;
	317	t[1].len = len;
	318	spi_message_add_tail(&t[1], &m);
	319
	320	spi_sync(wl->spi, &m);
	321
322	wl12xx_dump(DEBUG_SPI, "spi_write cmd -> ", &cmd, sizeof(cmd));
323	wl12xx_dump(DEBUG_SPI, "spi_write buf -> ", buf, len);
324	}
325
326	void wl12xx_spi_mem_read(struct wl12xx wl, int addr, void buf,
327	size_t len)
328	{
329	int physical;
330
331	physical = wl12xx_translate_mem_addr(wl, addr);
332
333	wl12xx_spi_read(wl, physical, buf, len);
334	}
335
336	void wl12xx_spi_mem_write(struct wl12xx wl, int addr, void buf,
337	size_t len)
338	{
339	int physical;
340
341	physical = wl12xx_translate_mem_addr(wl, addr);
342
343	wl12xx_spi_write(wl, physical, buf, len);
344	}
345
346	u32 wl12xx_mem_read32(struct wl12xx *wl, int addr)
347	{
348	return wl12xx_read32(wl, wl12xx_translate_mem_addr(wl, addr));
349	}
350
351	void wl12xx_mem_write32(struct wl12xx *wl, int addr, u32 val)
352	{
353	wl12xx_write32(wl, wl12xx_translate_mem_addr(wl, addr), val);
354	}
355
356	u32 wl12xx_reg_read32(struct wl12xx *wl, int addr)
357	{
358	return wl12xx_read32(wl, wl12xx_translate_reg_addr(wl, addr));
359	}
360
361	void wl12xx_reg_write32(struct wl12xx *wl, int addr, u32 val)
362	{
363	wl12xx_write32(wl, wl12xx_translate_reg_addr(wl, addr), val);
364	}