[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 */
		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);
	}
	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);
	}
}

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;
	}

	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_cfgpull(S3C2410_GPH(0), S3C_GPIO_PULL_NONE);
	s3c_gpio_cfgpin(S3C2410_GPH(1), S3C2410_GPIO_OUTPUT);
	s3c_gpio_cfgpull(S3C2410_GPH(1), S3C_GPIO_PULL_NONE);
	s3c_gpio_cfgpin(S3C2410_GPH(2), S3C2410_GPH2_TXD0);
	s3c_gpio_cfgpull(S3C2410_GPH(2), S3C_GPIO_PULL_NONE);
	s3c_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	32	/* Power on the chip */
14477095	33	gpio_set_value(H1940_LATCH_BLUETOOTH_POWER, 1);
7fdc7849 AP	34	/* Reset the chip */
7fdc7849 AP	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	45	mdelay(10);
14477095	46	gpio_set_value(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));
f4146a65 BD	66	if (ret) {
14477095 VK	67	dev_err(&pdev->dev, "could not get GPH1\n");
	68	return ret;
	69	}
	70
	71	ret = gpio_request(H1940_LATCH_BLUETOOTH_POWER, dev_name(&pdev->dev));
	72	if (ret) {
	73	gpio_free(S3C2410_GPH(1));
	74	dev_err(&pdev->dev, "could not get BT_POWER\n");
f4146a65 BD	75	return ret;
	76	}
	77
7fdc7849	78	/* Configures BT serial port GPIOs */
40b956f0	79	s3c_gpio_cfgpin(S3C2410_GPH(0), S3C2410_GPH0_nCTS0);
27da0404	80	s3c_gpio_cfgpull(S3C2410_GPH(0), S3C_GPIO_PULL_NONE);
40b956f0	81	s3c_gpio_cfgpin(S3C2410_GPH(1), S3C2410_GPIO_OUTPUT);
27da0404	82	s3c_gpio_cfgpull(S3C2410_GPH(1), S3C_GPIO_PULL_NONE);
40b956f0	83	s3c_gpio_cfgpin(S3C2410_GPH(2), S3C2410_GPH2_TXD0);
27da0404	84	s3c_gpio_cfgpull(S3C2410_GPH(2), S3C_GPIO_PULL_NONE);
40b956f0	85	s3c_gpio_cfgpin(S3C2410_GPH(3), S3C2410_GPH3_RXD0);
27da0404	86	s3c_gpio_cfgpull(S3C2410_GPH(3), S3C_GPIO_PULL_NONE);
7fdc7849	87
7fdc7849	88
1a71e4ad AP	89	rfk = rfkill_alloc(DRV_NAME, &pdev->dev, RFKILL_TYPE_BLUETOOTH,
	90	&h1940bt_rfkill_ops, NULL);
	91	if (!rfk) {
	92	ret = -ENOMEM;
	93	goto err_rfk_alloc;
	94	}
	95
	96	rfkill_set_led_trigger_name(rfk, "h1940-bluetooth");
	97
	98	ret = rfkill_register(rfk);
	99	if (ret)
	100	goto err_rfkill;
	101
	102	platform_set_drvdata(pdev, rfk);
	103
	104	return 0;
7fdc7849	105
1a71e4ad AP	106	err_rfkill:
	107	rfkill_destroy(rfk);
	108	err_rfk_alloc:
	109	return ret;
7fdc7849 AP	110	}
	111
	112	static int h1940bt_remove(struct platform_device *pdev)
	113	{
1a71e4ad AP	114	struct rfkill *rfk = platform_get_drvdata(pdev);
	115
	116	platform_set_drvdata(pdev, NULL);
f4146a65	117	gpio_free(S3C2410_GPH(1));
1a71e4ad AP	118
	119	if (rfk) {
	120	rfkill_unregister(rfk);
	121	rfkill_destroy(rfk);
	122	}
	123	rfk = NULL;
	124
	125	h1940bt_enable(0);
	126
7fdc7849 AP	127	return 0;
	128	}
	129
	130
	131	static struct platform_driver h1940bt_driver = {
	132	.driver = {
	133	.name = DRV_NAME,
	134	},
	135	.probe = h1940bt_probe,
	136	.remove = h1940bt_remove,
	137	};
	138
	139
	140	static int __init h1940bt_init(void)
	141	{
	142	return platform_driver_register(&h1940bt_driver);
	143	}
	144
	145	static void __exit h1940bt_exit(void)
	146	{
	147	platform_driver_unregister(&h1940bt_driver);
	148	}
	149
	150	module_init(h1940bt_init);
	151	module_exit(h1940bt_exit);
	152
	153	MODULE_AUTHOR("Arnaud Patard <arnaud.patard@rtp-net.org>");
	154	MODULE_DESCRIPTION("Driver for the iPAQ H1940 bluetooth chip");
	155	MODULE_LICENSE("GPL");