[net-next-2.6.git] / arch / arm / mach-s3c2410 / 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 <mach/regs-gpio.h>
#include <mach/hardware.h>
#include <mach/h1940-latch.h>

#define DRV_NAME              "h1940-bt"

/* Bluetooth control */
static void h1940bt_enable(int on)
{
	if (on) {
		/* Power on the chip */
		h1940_latch_control(0, H1940_LATCH_BLUETOOTH_POWER);
		/* Reset the chip */
		mdelay(10);

		gpio_set_value(S3C2410_GPH(1), 1);
		mdelay(10);
		gpio_set_value(S3C2410_GPH(1), 0);
	}
	else {
		gpio_set_value(S3C2410_GPH(1), 1);
		mdelay(10);
		gpio_set_value(S3C2410_GPH(1), 0);
		mdelay(10);
		h1940_latch_control(H1940_LATCH_BLUETOOTH_POWER, 0);
	}
}

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 __devinit 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;
	}

	/* Configures BT serial port GPIOs */
	s3c2410_gpio_cfgpin(S3C2410_GPH(0), S3C2410_GPH0_nCTS0);
	s3c_gpio_cfgpull(S3C2410_GPH(0), S3C_GPIO_PULL_NONE);
	s3c2410_gpio_cfgpin(S3C2410_GPH(1), S3C2410_GPIO_OUTPUT);
	s3c_gpio_cfgpull(S3C2410_GPH(1), S3C_GPIO_PULL_NONE);
	s3c2410_gpio_cfgpin(S3C2410_GPH(2), S3C2410_GPH2_TXD0);
	s3c_gpio_cfgpull(S3C2410_GPH(2), S3C_GPIO_PULL_NONE);
	s3c2410_gpio_cfgpin(S3C2410_GPH(3), S3C2410_GPH3_RXD0);
	s3c_gpio_cfgpull(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;
	}

	rfkill_set_led_trigger_name(rfk, "h1940-bluetooth");

	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,
};


static int __init h1940bt_init(void)
{
	return platform_driver_register(&h1940bt_driver);
}

static void __exit h1940bt_exit(void)
{
	platform_driver_unregister(&h1940bt_driver);
}

module_init(h1940bt_init);
module_exit(h1940bt_exit);

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
a09e64fb RK	22	#include <mach/regs-gpio.h>
	23	#include <mach/hardware.h>
	24	#include <mach/h1940-latch.h>
7fdc7849 AP	25
	26	#define DRV_NAME "h1940-bt"
	27
7fdc7849 AP	28	/* Bluetooth control */
	29	static void h1940bt_enable(int on)
	30	{
	31	if (on) {
7fdc7849 AP	32	/* Power on the chip */
	33	h1940_latch_control(0, H1940_LATCH_BLUETOOTH_POWER);
	34	/* Reset the chip */
	35	mdelay(10);
f4146a65 BD	36
f4146a65 BD	37	gpio_set_value(S3C2410_GPH(1), 1);
7fdc7849	38	mdelay(10);
f4146a65	39	gpio_set_value(S3C2410_GPH(1), 0);
7fdc7849 AP	40	}
7fdc7849 AP	41	else {
f4146a65	42	gpio_set_value(S3C2410_GPH(1), 1);
7fdc7849	43	mdelay(10);
f4146a65	44	gpio_set_value(S3C2410_GPH(1), 0);
7fdc7849 AP	45	mdelay(10);
7fdc7849 AP	46	h1940_latch_control(H1940_LATCH_BLUETOOTH_POWER, 0);
7fdc7849 AP	47	}
	48	}
	49
1a71e4ad	50	static int h1940bt_set_block(void *data, bool blocked)
7fdc7849	51	{
1a71e4ad AP	52	h1940bt_enable(!blocked);
1a71e4ad AP	53	return 0;
7fdc7849 AP	54	}
7fdc7849 AP	55
1a71e4ad AP	56	static const struct rfkill_ops h1940bt_rfkill_ops = {
	57	.set_block = h1940bt_set_block,
	58	};
7fdc7849	59
91a99dfc	60	static int __devinit h1940bt_probe(struct platform_device *pdev)
7fdc7849	61	{
1a71e4ad AP	62	struct rfkill *rfk;
	63	int ret = 0;
	64
f4146a65 BD	65	ret = gpio_request(S3C2410_GPH(1), dev_name(&pdev->dev));
	66	if (ret) {
	67	dev_err(&pdev->dev, "could not get GPH1\n");\
	68	return ret;
	69	}
	70
7fdc7849	71	/* Configures BT serial port GPIOs */
070276d5	72	s3c2410_gpio_cfgpin(S3C2410_GPH(0), S3C2410_GPH0_nCTS0);
27da0404	73	s3c_gpio_cfgpull(S3C2410_GPH(0), S3C_GPIO_PULL_NONE);
070276d5	74	s3c2410_gpio_cfgpin(S3C2410_GPH(1), S3C2410_GPIO_OUTPUT);
27da0404	75	s3c_gpio_cfgpull(S3C2410_GPH(1), S3C_GPIO_PULL_NONE);
070276d5	76	s3c2410_gpio_cfgpin(S3C2410_GPH(2), S3C2410_GPH2_TXD0);
27da0404	77	s3c_gpio_cfgpull(S3C2410_GPH(2), S3C_GPIO_PULL_NONE);
070276d5	78	s3c2410_gpio_cfgpin(S3C2410_GPH(3), S3C2410_GPH3_RXD0);
27da0404	79	s3c_gpio_cfgpull(S3C2410_GPH(3), S3C_GPIO_PULL_NONE);
7fdc7849	80
7fdc7849	81
1a71e4ad AP	82	rfk = rfkill_alloc(DRV_NAME, &pdev->dev, RFKILL_TYPE_BLUETOOTH,
	83	&h1940bt_rfkill_ops, NULL);
	84	if (!rfk) {
	85	ret = -ENOMEM;
	86	goto err_rfk_alloc;
	87	}
	88
	89	rfkill_set_led_trigger_name(rfk, "h1940-bluetooth");
	90
	91	ret = rfkill_register(rfk);
	92	if (ret)
	93	goto err_rfkill;
	94
	95	platform_set_drvdata(pdev, rfk);
	96
	97	return 0;
7fdc7849	98
1a71e4ad AP	99	err_rfkill:
	100	rfkill_destroy(rfk);
	101	err_rfk_alloc:
	102	return ret;
7fdc7849 AP	103	}
	104
	105	static int h1940bt_remove(struct platform_device *pdev)
	106	{
1a71e4ad AP	107	struct rfkill *rfk = platform_get_drvdata(pdev);
	108
	109	platform_set_drvdata(pdev, NULL);
f4146a65	110	gpio_free(S3C2410_GPH(1));
1a71e4ad AP	111
	112	if (rfk) {
	113	rfkill_unregister(rfk);
	114	rfkill_destroy(rfk);
	115	}
	116	rfk = NULL;
	117
	118	h1940bt_enable(0);
	119
7fdc7849 AP	120	return 0;
	121	}
	122
	123
	124	static struct platform_driver h1940bt_driver = {
	125	.driver = {
	126	.name = DRV_NAME,
	127	},
	128	.probe = h1940bt_probe,
	129	.remove = h1940bt_remove,
	130	};
	131
	132
	133	static int __init h1940bt_init(void)
	134	{
	135	return platform_driver_register(&h1940bt_driver);
	136	}
	137
	138	static void __exit h1940bt_exit(void)
	139	{
	140	platform_driver_unregister(&h1940bt_driver);
	141	}
	142
	143	module_init(h1940bt_init);
	144	module_exit(h1940bt_exit);
	145
	146	MODULE_AUTHOR("Arnaud Patard <arnaud.patard@rtp-net.org>");
	147	MODULE_DESCRIPTION("Driver for the iPAQ H1940 bluetooth chip");
	148	MODULE_LICENSE("GPL");