[deliverable/linux.git] / arch / arm / mach-s3c24xx / h1940-bluetooth.c

/*
 * arch/arm/mach-s3c2410/h1940-bluetooth.c
 * Copyright (c) Arnaud Patard <arnaud.patard@rtp-net.org>
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file COPYING in the main directory of this archive for
 * more details.
 *
 *	    S3C2410 bluetooth "driver"
 *
 */

#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/delay.h>
#include <linux/string.h>
#include <linux/ctype.h>
#include <linux/leds.h>
#include <linux/gpio.h>
#include <linux/rfkill.h>

#include <plat/gpio-cfg.h>
#include <mach/hardware.h>
#include <mach/regs-gpio.h>
#include <mach/gpio-samsung.h>

#include "h1940.h"

#define DRV_NAME "h1940-bt"

/* Bluetooth control */
static void h1940bt_enable(int on)
{
	if (on) {
		/* Power on the chip */
		gpio_set_value(H1940_LATCH_BLUETOOTH_POWER, 1);
		/* Reset the chip */
		mdelay(10);

		gpio_set_value(S3C2410_GPH(1), 1);
		mdelay(10);
		gpio_set_value(S3C2410_GPH(1), 0);

		h1940_led_blink_set(-EINVAL, GPIO_LED_BLINK, NULL, NULL);
	}
	else {
		gpio_set_value(S3C2410_GPH(1), 1);
		mdelay(10);
		gpio_set_value(S3C2410_GPH(1), 0);
		mdelay(10);
		gpio_set_value(H1940_LATCH_BLUETOOTH_POWER, 0);

		h1940_led_blink_set(-EINVAL, GPIO_LED_NO_BLINK_LOW, NULL, NULL);
	}
}

static int h1940bt_set_block(void *data, bool blocked)
{
	h1940bt_enable(!blocked);
	return 0;
}

static const struct rfkill_ops h1940bt_rfkill_ops = {
	.set_block = h1940bt_set_block,
};

static int h1940bt_probe(struct platform_device *pdev)
{
	struct rfkill *rfk;
	int ret = 0;

	ret = gpio_request(S3C2410_GPH(1), dev_name(&pdev->dev));
	if (ret) {
		dev_err(&pdev->dev, "could not get GPH1\n");
		return ret;
	}

	ret = gpio_request(H1940_LATCH_BLUETOOTH_POWER, dev_name(&pdev->dev));
	if (ret) {
		gpio_free(S3C2410_GPH(1));
		dev_err(&pdev->dev, "could not get BT_POWER\n");
		return ret;
	}

	/* Configures BT serial port GPIOs */
	s3c_gpio_cfgpin(S3C2410_GPH(0), S3C2410_GPH0_nCTS0);
	s3c_gpio_setpull(S3C2410_GPH(0), S3C_GPIO_PULL_NONE);
	s3c_gpio_cfgpin(S3C2410_GPH(1), S3C2410_GPIO_OUTPUT);
	s3c_gpio_setpull(S3C2410_GPH(1), S3C_GPIO_PULL_NONE);
	s3c_gpio_cfgpin(S3C2410_GPH(2), S3C2410_GPH2_TXD0);
	s3c_gpio_setpull(S3C2410_GPH(2), S3C_GPIO_PULL_NONE);
	s3c_gpio_cfgpin(S3C2410_GPH(3), S3C2410_GPH3_RXD0);
	s3c_gpio_setpull(S3C2410_GPH(3), S3C_GPIO_PULL_NONE);

	rfk = rfkill_alloc(DRV_NAME, &pdev->dev, RFKILL_TYPE_BLUETOOTH,
			&h1940bt_rfkill_ops, NULL);
	if (!rfk) {
		ret = -ENOMEM;
		goto err_rfk_alloc;
	}

	ret = rfkill_register(rfk);
	if (ret)
		goto err_rfkill;

	platform_set_drvdata(pdev, rfk);

	return 0;

err_rfkill:
	rfkill_destroy(rfk);
err_rfk_alloc:
	return ret;
}

static int h1940bt_remove(struct platform_device *pdev)
{
	struct rfkill *rfk = platform_get_drvdata(pdev);

	platform_set_drvdata(pdev, NULL);
	gpio_free(S3C2410_GPH(1));

	if (rfk) {
		rfkill_unregister(rfk);
		rfkill_destroy(rfk);
	}
	rfk = NULL;

	h1940bt_enable(0);

	return 0;
}


static struct platform_driver h1940bt_driver = {
	.driver		= {
		.name	= DRV_NAME,
	},
	.probe		= h1940bt_probe,
	.remove		= h1940bt_remove,
};

module_platform_driver(h1940bt_driver);

MODULE_AUTHOR("Arnaud Patard <arnaud.patard@rtp-net.org>");
MODULE_DESCRIPTION("Driver for the iPAQ H1940 bluetooth chip");
MODULE_LICENSE("GPL");
Commit	Line	Data
7fdc7849 AP	1	/*
	2	* arch/arm/mach-s3c2410/h1940-bluetooth.c
	3	* Copyright (c) Arnaud Patard <arnaud.patard@rtp-net.org>
	4	*
	5	* This file is subject to the terms and conditions of the GNU General Public
	6	* License. See the file COPYING in the main directory of this archive for
	7	* more details.
	8	*
	9	* S3C2410 bluetooth "driver"
	10	*
	11	*/
	12
	13	#include <linux/module.h>
	14	#include <linux/platform_device.h>
	15	#include <linux/delay.h>
	16	#include <linux/string.h>
	17	#include <linux/ctype.h>
	18	#include <linux/leds.h>
ec976d6e	19	#include <linux/gpio.h>
1a71e4ad	20	#include <linux/rfkill.h>
ec976d6e	21
36437412	22	#include <plat/gpio-cfg.h>
a09e64fb	23	#include <mach/hardware.h>
232910d6	24	#include <mach/regs-gpio.h>
b0161caa	25	#include <mach/gpio-samsung.h>
232910d6 KK	26
232910d6 KK	27	#include "h1940.h"
7fdc7849	28
50e2d10d	29	#define DRV_NAME "h1940-bt"
7fdc7849	30
7fdc7849 AP	31	/* Bluetooth control */
	32	static void h1940bt_enable(int on)
	33	{
	34	if (on) {
7fdc7849	35	/* Power on the chip */
14477095	36	gpio_set_value(H1940_LATCH_BLUETOOTH_POWER, 1);
7fdc7849 AP	37	/* Reset the chip */
7fdc7849 AP	38	mdelay(10);
f4146a65 BD	39
f4146a65 BD	40	gpio_set_value(S3C2410_GPH(1), 1);
7fdc7849	41	mdelay(10);
f4146a65	42	gpio_set_value(S3C2410_GPH(1), 0);
50e2d10d VK	43
50e2d10d VK	44	h1940_led_blink_set(-EINVAL, GPIO_LED_BLINK, NULL, NULL);
7fdc7849 AP	45	}
7fdc7849 AP	46	else {
f4146a65	47	gpio_set_value(S3C2410_GPH(1), 1);
7fdc7849	48	mdelay(10);
f4146a65	49	gpio_set_value(S3C2410_GPH(1), 0);
7fdc7849	50	mdelay(10);
14477095	51	gpio_set_value(H1940_LATCH_BLUETOOTH_POWER, 0);
50e2d10d VK	52
50e2d10d VK	53	h1940_led_blink_set(-EINVAL, GPIO_LED_NO_BLINK_LOW, NULL, NULL);
7fdc7849 AP	54	}
	55	}
	56
1a71e4ad	57	static int h1940bt_set_block(void *data, bool blocked)
7fdc7849	58	{
1a71e4ad	59	h1940bt_enable(!blocked);
1a71e4ad	60	return 0;
7fdc7849 AP	61	}
7fdc7849 AP	62
1a71e4ad	63	static const struct rfkill_ops h1940bt_rfkill_ops = {
	64	.set_block = h1940bt_set_block,
	65	};
7fdc7849	66
351a102d	67	static int h1940bt_probe(struct platform_device *pdev)
7fdc7849	68	{
1a71e4ad	69	struct rfkill *rfk;
	70	int ret = 0;
	71
f4146a65 BD	72	ret = gpio_request(S3C2410_GPH(1), dev_name(&pdev->dev));
f4146a65 BD	73	if (ret) {
14477095 VK	74	dev_err(&pdev->dev, "could not get GPH1\n");
	75	return ret;
	76	}
	77
	78	ret = gpio_request(H1940_LATCH_BLUETOOTH_POWER, dev_name(&pdev->dev));
	79	if (ret) {
	80	gpio_free(S3C2410_GPH(1));
	81	dev_err(&pdev->dev, "could not get BT_POWER\n");
f4146a65 BD	82	return ret;
	83	}
	84
7fdc7849	85	/* Configures BT serial port GPIOs */
40b956f0	86	s3c_gpio_cfgpin(S3C2410_GPH(0), S3C2410_GPH0_nCTS0);
6fc50eaf	87	s3c_gpio_setpull(S3C2410_GPH(0), S3C_GPIO_PULL_NONE);
40b956f0	88	s3c_gpio_cfgpin(S3C2410_GPH(1), S3C2410_GPIO_OUTPUT);
6fc50eaf	89	s3c_gpio_setpull(S3C2410_GPH(1), S3C_GPIO_PULL_NONE);
40b956f0	90	s3c_gpio_cfgpin(S3C2410_GPH(2), S3C2410_GPH2_TXD0);
6fc50eaf	91	s3c_gpio_setpull(S3C2410_GPH(2), S3C_GPIO_PULL_NONE);
40b956f0	92	s3c_gpio_cfgpin(S3C2410_GPH(3), S3C2410_GPH3_RXD0);
6fc50eaf	93	s3c_gpio_setpull(S3C2410_GPH(3), S3C_GPIO_PULL_NONE);
7fdc7849	94
1a71e4ad	95	rfk = rfkill_alloc(DRV_NAME, &pdev->dev, RFKILL_TYPE_BLUETOOTH,
	96	&h1940bt_rfkill_ops, NULL);
	97	if (!rfk) {
	98	ret = -ENOMEM;
	99	goto err_rfk_alloc;
	100	}
	101
1a71e4ad	102	ret = rfkill_register(rfk);
	103	if (ret)
	104	goto err_rfkill;
	105
	106	platform_set_drvdata(pdev, rfk);
	107
	108	return 0;
7fdc7849	109
1a71e4ad	110	err_rfkill:
	111	rfkill_destroy(rfk);
	112	err_rfk_alloc:
	113	return ret;
7fdc7849 AP	114	}
	115
	116	static int h1940bt_remove(struct platform_device *pdev)
	117	{
1a71e4ad	118	struct rfkill *rfk = platform_get_drvdata(pdev);
	119
	120	platform_set_drvdata(pdev, NULL);
f4146a65	121	gpio_free(S3C2410_GPH(1));
1a71e4ad	122
	123	if (rfk) {
	124	rfkill_unregister(rfk);
	125	rfkill_destroy(rfk);
	126	}
	127	rfk = NULL;
	128
	129	h1940bt_enable(0);
	130
7fdc7849 AP	131	return 0;
	132	}
	133
	134
	135	static struct platform_driver h1940bt_driver = {
	136	.driver = {
	137	.name = DRV_NAME,
	138	},
	139	.probe = h1940bt_probe,
	140	.remove = h1940bt_remove,
	141	};
	142
1fffc8b2	143	module_platform_driver(h1940bt_driver);
7fdc7849 AP	144
	145	MODULE_AUTHOR("Arnaud Patard <arnaud.patard@rtp-net.org>");
	146	MODULE_DESCRIPTION("Driver for the iPAQ H1940 bluetooth chip");
	147	MODULE_LICENSE("GPL");