[linux-2.6-block.git] / drivers / net / wireless / wl12xx / 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/interrupt.h>
#include <linux/irq.h>
#include <linux/module.h>
#include <linux/crc7.h>
#include <linux/spi/spi.h>
#include <linux/wl12xx.h>
#include <linux/platform_device.h>
#include <linux/slab.h>

#include "wl12xx.h"
#include "debug.h"
#include "wl12xx_80211.h"
#include "io.h"

#include "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

/* HW limitation: maximum possible chunk size is 4095 bytes */
#define WSPI_MAX_CHUNK_SIZE    4092

#define WSPI_MAX_NUM_OF_CHUNKS (WL1271_AGGR_BUFFER_SIZE / WSPI_MAX_CHUNK_SIZE)

struct wl12xx_spi_glue {
	struct device *dev;
	struct platform_device *core;
};

static void wl12xx_spi_reset(struct device *child)
{
	struct wl12xx_spi_glue *glue = dev_get_drvdata(child->parent);
	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(to_spi_device(glue->dev), &m);

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

static void wl12xx_spi_init(struct device *child)
{
	struct wl12xx_spi_glue *glue = dev_get_drvdata(child->parent);
	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(to_spi_device(glue->dev), &m);
	wl1271_dump(DEBUG_SPI, "spi init -> ", cmd, WSPI_INIT_CMD_LEN);
	kfree(cmd);
}

#define WL1271_BUSY_WORD_TIMEOUT 1000

static int wl12xx_spi_read_busy(struct device *child)
{
	struct wl12xx_spi_glue *glue = dev_get_drvdata(child->parent);
	struct wl1271 *wl = dev_get_drvdata(child);
	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(to_spi_device(glue->dev), &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 wl12xx_spi_raw_read(struct device *child, int addr, void *buf,
				size_t len, bool fixed)
{
	struct wl12xx_spi_glue *glue = dev_get_drvdata(child->parent);
	struct wl1271 *wl = dev_get_drvdata(child);
	struct spi_transfer t[2];
	struct spi_message m;
	u32 *busy_buf;
	u32 *cmd;
	u32 chunk_len;

	while (len > 0) {
		chunk_len = min((size_t)WSPI_MAX_CHUNK_SIZE, len);

		cmd = &wl->buffer_cmd;
		busy_buf = wl->buffer_busyword;

		*cmd = 0;
		*cmd |= WSPI_CMD_READ;
		*cmd |= (chunk_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(to_spi_device(glue->dev), &m);

		if (!(busy_buf[WL1271_BUSY_WORD_CNT - 1] & 0x1) &&
		    wl12xx_spi_read_busy(child)) {
			memset(buf, 0, chunk_len);
			return;
		}

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

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

		spi_sync(to_spi_device(glue->dev), &m);

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

		if (!fixed)
			addr += chunk_len;
		buf += chunk_len;
		len -= chunk_len;
	}
}

static void wl12xx_spi_raw_write(struct device *child, int addr, void *buf,
				 size_t len, bool fixed)
{
	struct wl12xx_spi_glue *glue = dev_get_drvdata(child->parent);
	struct spi_transfer t[2 * WSPI_MAX_NUM_OF_CHUNKS];
	struct spi_message m;
	u32 commands[WSPI_MAX_NUM_OF_CHUNKS];
	u32 *cmd;
	u32 chunk_len;
	int i;

	WARN_ON(len > WL1271_AGGR_BUFFER_SIZE);

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

	cmd = &commands[0];
	i = 0;
	while (len > 0) {
		chunk_len = min((size_t)WSPI_MAX_CHUNK_SIZE, len);

		*cmd = 0;
		*cmd |= WSPI_CMD_WRITE;
		*cmd |= (chunk_len << WSPI_CMD_BYTE_LENGTH_OFFSET) &
			WSPI_CMD_BYTE_LENGTH;
		*cmd |= addr & WSPI_CMD_BYTE_ADDR;

		if (fixed)
			*cmd |= WSPI_CMD_FIXED;

		t[i].tx_buf = cmd;
		t[i].len = sizeof(*cmd);
		spi_message_add_tail(&t[i++], &m);

		t[i].tx_buf = buf;
		t[i].len = chunk_len;
		spi_message_add_tail(&t[i++], &m);

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

		if (!fixed)
			addr += chunk_len;
		buf += chunk_len;
		len -= chunk_len;
		cmd++;
	}

	spi_sync(to_spi_device(glue->dev), &m);
}

static struct wl1271_if_operations spi_ops = {
	.read		= wl12xx_spi_raw_read,
	.write		= wl12xx_spi_raw_write,
	.reset		= wl12xx_spi_reset,
	.init		= wl12xx_spi_init,
	.set_block_size = NULL,
};

static int __devinit wl1271_probe(struct spi_device *spi)
{
	struct wl12xx_spi_glue *glue;
	struct wl12xx_platform_data *pdata;
	struct resource res[1];
	int ret = -ENOMEM;

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

	pdata->ops = &spi_ops;

	glue = kzalloc(sizeof(*glue), GFP_KERNEL);
	if (!glue) {
		wl1271_error("can't allocate glue");
		goto out;
	}

	glue->dev = &spi->dev;

	spi_set_drvdata(spi, glue);

	/* 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_glue;
	}

	glue->core = platform_device_alloc("wl12xx-spi", -1);
	if (!glue->core) {
		wl1271_error("can't allocate platform_device");
		ret = -ENOMEM;
		goto out_free_glue;
	}

	glue->core->dev.parent = &spi->dev;

	memset(res, 0x00, sizeof(res));

	res[0].start = spi->irq;
	res[0].flags = IORESOURCE_IRQ;
	res[0].name = "irq";

	ret = platform_device_add_resources(glue->core, res, ARRAY_SIZE(res));
	if (ret) {
		wl1271_error("can't add resources");
		goto out_dev_put;
	}

	ret = platform_device_add_data(glue->core, pdata, sizeof(*pdata));
	if (ret) {
		wl1271_error("can't add platform data");
		goto out_dev_put;
	}

	ret = platform_device_add(glue->core);
	if (ret) {
		wl1271_error("can't register platform device");
		goto out_dev_put;
	}

	return 0;

out_dev_put:
	platform_device_put(glue->core);

out_free_glue:
	kfree(glue);
out:
	return ret;
}

static int __devexit wl1271_remove(struct spi_device *spi)
{
	struct wl12xx_spi_glue *glue = spi_get_drvdata(spi);

	platform_device_del(glue->core);
	platform_device_put(glue->core);
	kfree(glue);

	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)
{
	return spi_register_driver(&wl1271_spi_driver);
}

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

module_init(wl1271_init);
module_exit(wl1271_exit);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Luciano Coelho <coelho@ti.com>");
MODULE_AUTHOR("Juuso Oikarinen <juuso.oikarinen@nokia.com>");
MODULE_FIRMWARE(WL127X_FW_NAME);
MODULE_FIRMWARE(WL128X_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
a6b7a407	24	#include <linux/interrupt.h>
2d5e82b8	25	#include <linux/irq.h>
f5fc0f86	26	#include <linux/module.h>
f5fc0f86 LC	27	#include <linux/crc7.h>
f5fc0f86 LC	28	#include <linux/spi/spi.h>
c1f9a095	29	#include <linux/wl12xx.h>
0969d679	30	#include <linux/platform_device.h>
5a0e3ad6	31	#include <linux/slab.h>
f5fc0f86	32
00d20100	33	#include "wl12xx.h"
0f4e3122	34	#include "debug.h"
f5fc0f86	35	#include "wl12xx_80211.h"
00d20100	36	#include "io.h"
f5fc0f86	37
00d20100	38	#include "reg.h"
760d969f TP	39
	40	#define WSPI_CMD_READ 0x40000000
	41	#define WSPI_CMD_WRITE 0x00000000
	42	#define WSPI_CMD_FIXED 0x20000000
	43	#define WSPI_CMD_BYTE_LENGTH 0x1FFE0000
	44	#define WSPI_CMD_BYTE_LENGTH_OFFSET 17
	45	#define WSPI_CMD_BYTE_ADDR 0x0001FFFF
	46
	47	#define WSPI_INIT_CMD_CRC_LEN 5
	48
	49	#define WSPI_INIT_CMD_START 0x00
	50	#define WSPI_INIT_CMD_TX 0x40
	51	/* the extra bypass bit is sampled by the TNET as '1' */
	52	#define WSPI_INIT_CMD_BYPASS_BIT 0x80
	53	#define WSPI_INIT_CMD_FIXEDBUSY_LEN 0x07
	54	#define WSPI_INIT_CMD_EN_FIXEDBUSY 0x80
	55	#define WSPI_INIT_CMD_DIS_FIXEDBUSY 0x00
	56	#define WSPI_INIT_CMD_IOD 0x40
	57	#define WSPI_INIT_CMD_IP 0x20
	58	#define WSPI_INIT_CMD_CS 0x10
	59	#define WSPI_INIT_CMD_WS 0x08
	60	#define WSPI_INIT_CMD_WSPI 0x01
	61	#define WSPI_INIT_CMD_END 0x01
	62
	63	#define WSPI_INIT_CMD_LEN 8
	64
	65	#define HW_ACCESS_WSPI_FIXED_BUSY_LEN \
	66	((WL1271_BUSY_WORD_LEN - 4) / sizeof(u32))
	67	#define HW_ACCESS_WSPI_INIT_CMD_MASK 0
	68
5c57a901 IY	69	/* HW limitation: maximum possible chunk size is 4095 bytes */
	70	#define WSPI_MAX_CHUNK_SIZE 4092
	71
	72	#define WSPI_MAX_NUM_OF_CHUNKS (WL1271_AGGR_BUFFER_SIZE / WSPI_MAX_CHUNK_SIZE)
	73
b65019f6 FB	74	struct wl12xx_spi_glue {
b65019f6 FB	75	struct device *dev;
0969d679	76	struct platform_device *core;
b65019f6 FB	77	};
b65019f6 FB	78
a390e85c	79	static void wl12xx_spi_reset(struct device *child)
8197b711	80	{
a390e85c	81	struct wl12xx_spi_glue *glue = dev_get_drvdata(child->parent);
f5fc0f86 LC	82	u8 *cmd;
	83	struct spi_transfer t;
	84	struct spi_message m;
	85
	86	cmd = kzalloc(WSPI_INIT_CMD_LEN, GFP_KERNEL);
	87	if (!cmd) {
	88	wl1271_error("could not allocate cmd for spi reset");
	89	return;
	90	}
	91
	92	memset(&t, 0, sizeof(t));
	93	spi_message_init(&m);
	94
	95	memset(cmd, 0xff, WSPI_INIT_CMD_LEN);
	96
	97	t.tx_buf = cmd;
	98	t.len = WSPI_INIT_CMD_LEN;
	99	spi_message_add_tail(&t, &m);
	100
b65019f6	101	spi_sync(to_spi_device(glue->dev), &m);
f5fc0f86 LC	102
f5fc0f86 LC	103	wl1271_dump(DEBUG_SPI, "spi reset -> ", cmd, WSPI_INIT_CMD_LEN);
0dd38667	104	kfree(cmd);
f5fc0f86 LC	105	}
f5fc0f86 LC	106
a390e85c	107	static void wl12xx_spi_init(struct device *child)
f5fc0f86	108	{
a390e85c	109	struct wl12xx_spi_glue *glue = dev_get_drvdata(child->parent);
f5fc0f86 LC	110	u8 crc[WSPI_INIT_CMD_CRC_LEN], *cmd;
	111	struct spi_transfer t;
	112	struct spi_message m;
	113
	114	cmd = kzalloc(WSPI_INIT_CMD_LEN, GFP_KERNEL);
	115	if (!cmd) {
	116	wl1271_error("could not allocate cmd for spi init");
	117	return;
	118	}
	119
	120	memset(crc, 0, sizeof(crc));
	121	memset(&t, 0, sizeof(t));
	122	spi_message_init(&m);
	123
	124	/*
	125	* Set WSPI_INIT_COMMAND
	126	* the data is being send from the MSB to LSB
	127	*/
	128	cmd[2] = 0xff;
	129	cmd[3] = 0xff;
	130	cmd[1] = WSPI_INIT_CMD_START \| WSPI_INIT_CMD_TX;
	131	cmd[0] = 0;
	132	cmd[7] = 0;
	133	cmd[6] \|= HW_ACCESS_WSPI_INIT_CMD_MASK << 3;
	134	cmd[6] \|= HW_ACCESS_WSPI_FIXED_BUSY_LEN & WSPI_INIT_CMD_FIXEDBUSY_LEN;
	135
	136	if (HW_ACCESS_WSPI_FIXED_BUSY_LEN == 0)
	137	cmd[5] \|= WSPI_INIT_CMD_DIS_FIXEDBUSY;
	138	else
	139	cmd[5] \|= WSPI_INIT_CMD_EN_FIXEDBUSY;
	140
	141	cmd[5] \|= WSPI_INIT_CMD_IOD \| WSPI_INIT_CMD_IP \| WSPI_INIT_CMD_CS
	142	\| WSPI_INIT_CMD_WSPI \| WSPI_INIT_CMD_WS;
	143
	144	crc[0] = cmd[1];
	145	crc[1] = cmd[0];
	146	crc[2] = cmd[7];
	147	crc[3] = cmd[6];
	148	crc[4] = cmd[5];
	149
	150	cmd[4] \|= crc7(0, crc, WSPI_INIT_CMD_CRC_LEN) << 1;
	151	cmd[4] \|= WSPI_INIT_CMD_END;
	152
	153	t.tx_buf = cmd;
	154	t.len = WSPI_INIT_CMD_LEN;
	155	spi_message_add_tail(&t, &m);
	156
b65019f6	157	spi_sync(to_spi_device(glue->dev), &m);
f5fc0f86	158	wl1271_dump(DEBUG_SPI, "spi init -> ", cmd, WSPI_INIT_CMD_LEN);
bb123611	159	kfree(cmd);
f5fc0f86 LC	160	}
f5fc0f86 LC	161
545f1da8 JO	162	#define WL1271_BUSY_WORD_TIMEOUT 1000
545f1da8 JO	163
a390e85c	164	static int wl12xx_spi_read_busy(struct device *child)
545f1da8	165	{
a390e85c FB	166	struct wl12xx_spi_glue *glue = dev_get_drvdata(child->parent);
a390e85c FB	167	struct wl1271 *wl = dev_get_drvdata(child);
545f1da8 JO	168	struct spi_transfer t[1];
	169	struct spi_message m;
	170	u32 *busy_buf;
	171	int num_busy_bytes = 0;
	172
545f1da8 JO	173	/*
	174	* Read further busy words from SPI until a non-busy word is
	175	* encountered, then read the data itself into the buffer.
	176	*/
545f1da8 JO	177
	178	num_busy_bytes = WL1271_BUSY_WORD_TIMEOUT;
	179	busy_buf = wl->buffer_busyword;
	180	while (num_busy_bytes) {
	181	num_busy_bytes--;
	182	spi_message_init(&m);
	183	memset(t, 0, sizeof(t));
	184	t[0].rx_buf = busy_buf;
	185	t[0].len = sizeof(u32);
259da430	186	t[0].cs_change = true;
545f1da8	187	spi_message_add_tail(&t[0], &m);
b65019f6	188	spi_sync(to_spi_device(glue->dev), &m);
545f1da8	189
259da430 JO	190	if (*busy_buf & 0x1)
259da430 JO	191	return 0;
545f1da8 JO	192	}
	193
	194	/* The SPI bus is unresponsive, the read failed. */
545f1da8	195	wl1271_error("SPI read busy-word timeout!\n");
259da430	196	return -ETIMEDOUT;
545f1da8 JO	197	}
545f1da8 JO	198
a390e85c	199	static void wl12xx_spi_raw_read(struct device child, int addr, void buf,
259da430	200	size_t len, bool fixed)
f5fc0f86	201	{
a390e85c FB	202	struct wl12xx_spi_glue *glue = dev_get_drvdata(child->parent);
a390e85c FB	203	struct wl1271 *wl = dev_get_drvdata(child);
5c57a901	204	struct spi_transfer t[2];
f5fc0f86	205	struct spi_message m;
545f1da8	206	u32 *busy_buf;
f5fc0f86	207	u32 *cmd;
5c57a901	208	u32 chunk_len;
f5fc0f86	209
5c57a901 IY	210	while (len > 0) {
5c57a901 IY	211	chunk_len = min((size_t)WSPI_MAX_CHUNK_SIZE, len);
f5fc0f86	212
5c57a901 IY	213	cmd = &wl->buffer_cmd;
5c57a901 IY	214	busy_buf = wl->buffer_busyword;
f5fc0f86	215
5c57a901 IY	216	*cmd = 0;
	217	*cmd \|= WSPI_CMD_READ;
	218	*cmd \|= (chunk_len << WSPI_CMD_BYTE_LENGTH_OFFSET) &
	219	WSPI_CMD_BYTE_LENGTH;
	220	*cmd \|= addr & WSPI_CMD_BYTE_ADDR;
f5fc0f86	221
5c57a901 IY	222	if (fixed)
5c57a901 IY	223	*cmd \|= WSPI_CMD_FIXED;
f5fc0f86	224
5c57a901 IY	225	spi_message_init(&m);
5c57a901 IY	226	memset(t, 0, sizeof(t));
f5fc0f86	227
5c57a901 IY	228	t[0].tx_buf = cmd;
	229	t[0].len = 4;
	230	t[0].cs_change = true;
	231	spi_message_add_tail(&t[0], &m);
f5fc0f86	232
5c57a901 IY	233	/* Busy and non busy words read */
	234	t[1].rx_buf = busy_buf;
	235	t[1].len = WL1271_BUSY_WORD_LEN;
	236	t[1].cs_change = true;
	237	spi_message_add_tail(&t[1], &m);
f5fc0f86	238
b65019f6	239	spi_sync(to_spi_device(glue->dev), &m);
259da430	240
5c57a901	241	if (!(busy_buf[WL1271_BUSY_WORD_CNT - 1] & 0x1) &&
a390e85c	242	wl12xx_spi_read_busy(child)) {
5c57a901 IY	243	memset(buf, 0, chunk_len);
	244	return;
	245	}
259da430	246
5c57a901 IY	247	spi_message_init(&m);
5c57a901 IY	248	memset(t, 0, sizeof(t));
259da430	249
5c57a901 IY	250	t[0].rx_buf = buf;
	251	t[0].len = chunk_len;
	252	t[0].cs_change = true;
	253	spi_message_add_tail(&t[0], &m);
	254
b65019f6	255	spi_sync(to_spi_device(glue->dev), &m);
f5fc0f86	256
5c57a901 IY	257	wl1271_dump(DEBUG_SPI, "spi_read cmd -> ", cmd, sizeof(*cmd));
	258	wl1271_dump(DEBUG_SPI, "spi_read buf <- ", buf, chunk_len);
	259
	260	if (!fixed)
	261	addr += chunk_len;
	262	buf += chunk_len;
	263	len -= chunk_len;
	264	}
f5fc0f86 LC	265	}
f5fc0f86 LC	266
a390e85c FB	267	static void wl12xx_spi_raw_write(struct device child, int addr, void buf,
a390e85c FB	268	size_t len, bool fixed)
f5fc0f86	269	{
a390e85c	270	struct wl12xx_spi_glue *glue = dev_get_drvdata(child->parent);
5c57a901	271	struct spi_transfer t[2 * WSPI_MAX_NUM_OF_CHUNKS];
f5fc0f86	272	struct spi_message m;
5c57a901	273	u32 commands[WSPI_MAX_NUM_OF_CHUNKS];
f5fc0f86	274	u32 *cmd;
5c57a901 IY	275	u32 chunk_len;
5c57a901 IY	276	int i;
f5fc0f86	277
5c57a901	278	WARN_ON(len > WL1271_AGGR_BUFFER_SIZE);
f5fc0f86 LC	279
	280	spi_message_init(&m);
	281	memset(t, 0, sizeof(t));
	282
5c57a901 IY	283	cmd = &commands[0];
	284	i = 0;
	285	while (len > 0) {
	286	chunk_len = min((size_t)WSPI_MAX_CHUNK_SIZE, len);
f5fc0f86	287
5c57a901 IY	288	*cmd = 0;
	289	*cmd \|= WSPI_CMD_WRITE;
	290	*cmd \|= (chunk_len << WSPI_CMD_BYTE_LENGTH_OFFSET) &
	291	WSPI_CMD_BYTE_LENGTH;
	292	*cmd \|= addr & WSPI_CMD_BYTE_ADDR;
f5fc0f86	293
5c57a901 IY	294	if (fixed)
	295	*cmd \|= WSPI_CMD_FIXED;
	296
	297	t[i].tx_buf = cmd;
	298	t[i].len = sizeof(*cmd);
	299	spi_message_add_tail(&t[i++], &m);
	300
	301	t[i].tx_buf = buf;
	302	t[i].len = chunk_len;
	303	spi_message_add_tail(&t[i++], &m);
f5fc0f86	304
5c57a901 IY	305	wl1271_dump(DEBUG_SPI, "spi_write cmd -> ", cmd, sizeof(*cmd));
	306	wl1271_dump(DEBUG_SPI, "spi_write buf -> ", buf, chunk_len);
	307
	308	if (!fixed)
	309	addr += chunk_len;
	310	buf += chunk_len;
	311	len -= chunk_len;
	312	cmd++;
	313	}
	314
b65019f6	315	spi_sync(to_spi_device(glue->dev), &m);
f5fc0f86	316	}
2d5e82b8	317
8197b711	318	static struct wl1271_if_operations spi_ops = {
a390e85c FB	319	.read = wl12xx_spi_raw_read,
	320	.write = wl12xx_spi_raw_write,
	321	.reset = wl12xx_spi_reset,
	322	.init = wl12xx_spi_init,
a81159ed	323	.set_block_size = NULL,
8197b711 TP	324	};
8197b711 TP	325
2d5e82b8 TP	326	static int __devinit wl1271_probe(struct spi_device *spi)
2d5e82b8 TP	327	{
b65019f6	328	struct wl12xx_spi_glue *glue;
2d5e82b8	329	struct wl12xx_platform_data *pdata;
0969d679	330	struct resource res[1];
b65019f6	331	int ret = -ENOMEM;
2d5e82b8 TP	332
	333	pdata = spi->dev.platform_data;
	334	if (!pdata) {
	335	wl1271_error("no platform data");
	336	return -ENODEV;
	337	}
	338
a390e85c FB	339	pdata->ops = &spi_ops;
a390e85c FB	340
b65019f6 FB	341	glue = kzalloc(sizeof(*glue), GFP_KERNEL);
	342	if (!glue) {
	343	wl1271_error("can't allocate glue");
	344	goto out;
	345	}
	346
b65019f6	347	glue->dev = &spi->dev;
b65019f6 FB	348
b65019f6 FB	349	spi_set_drvdata(spi, glue);
2d5e82b8 TP	350
	351	/* This is the only SPI value that we need to set here, the rest
	352	* comes from the board-peripherals file */
	353	spi->bits_per_word = 32;
	354
	355	ret = spi_setup(spi);
	356	if (ret < 0) {
	357	wl1271_error("spi_setup failed");
a390e85c	358	goto out_free_glue;
2d5e82b8 TP	359	}
2d5e82b8 TP	360
0969d679 FB	361	glue->core = platform_device_alloc("wl12xx-spi", -1);
	362	if (!glue->core) {
	363	wl1271_error("can't allocate platform_device");
	364	ret = -ENOMEM;
a390e85c	365	goto out_free_glue;
0969d679 FB	366	}
	367
	368	glue->core->dev.parent = &spi->dev;
	369
	370	memset(res, 0x00, sizeof(res));
	371
	372	res[0].start = spi->irq;
	373	res[0].flags = IORESOURCE_IRQ;
	374	res[0].name = "irq";
	375
	376	ret = platform_device_add_resources(glue->core, res, ARRAY_SIZE(res));
	377	if (ret) {
	378	wl1271_error("can't add resources");
	379	goto out_dev_put;
	380	}
	381
	382	ret = platform_device_add_data(glue->core, pdata, sizeof(*pdata));
	383	if (ret) {
	384	wl1271_error("can't add platform data");
	385	goto out_dev_put;
	386	}
	387
	388	ret = platform_device_add(glue->core);
	389	if (ret) {
	390	wl1271_error("can't register platform device");
	391	goto out_dev_put;
	392	}
	393
2d5e82b8 TP	394	return 0;
2d5e82b8 TP	395
0969d679 FB	396	out_dev_put:
	397	platform_device_put(glue->core);
	398
b65019f6 FB	399	out_free_glue:
	400	kfree(glue);
	401	out:
2d5e82b8 TP	402	return ret;
	403	}
	404
	405	static int __devexit wl1271_remove(struct spi_device *spi)
	406	{
b65019f6	407	struct wl12xx_spi_glue *glue = spi_get_drvdata(spi);
2d5e82b8	408
0969d679 FB	409	platform_device_del(glue->core);
0969d679 FB	410	platform_device_put(glue->core);
b65019f6	411	kfree(glue);
2d5e82b8 TP	412
	413	return 0;
	414	}
	415
	416
	417	static struct spi_driver wl1271_spi_driver = {
	418	.driver = {
7fdd50d0	419	.name = "wl1271_spi",
2d5e82b8 TP	420	.bus = &spi_bus_type,
	421	.owner = THIS_MODULE,
	422	},
	423
	424	.probe = wl1271_probe,
	425	.remove = __devexit_p(wl1271_remove),
	426	};
	427
	428	static int __init wl1271_init(void)
	429	{
ba2274c6	430	return spi_register_driver(&wl1271_spi_driver);
2d5e82b8 TP	431	}
	432
	433	static void __exit wl1271_exit(void)
	434	{
	435	spi_unregister_driver(&wl1271_spi_driver);
2d5e82b8 TP	436	}
	437
	438	module_init(wl1271_init);
	439	module_exit(wl1271_exit);
	440
	441	MODULE_LICENSE("GPL");
5245e3a9	442	MODULE_AUTHOR("Luciano Coelho <coelho@ti.com>");
2d5e82b8	443	MODULE_AUTHOR("Juuso Oikarinen <juuso.oikarinen@nokia.com>");
c302b2c9	444	MODULE_FIRMWARE(WL127X_FW_NAME);
5aa42346	445	MODULE_FIRMWARE(WL128X_FW_NAME);
f148cfdd	446	MODULE_ALIAS("spi:wl1271");