[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 <mach/hardware.h>
#include <mach/regs-gpio.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 __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_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
a09e64fb	22	#include <mach/hardware.h>
232910d6 KK	23	#include <mach/regs-gpio.h>
	24
	25	#include "h1940.h"
7fdc7849	26
50e2d10d	27	#define DRV_NAME "h1940-bt"
7fdc7849	28
7fdc7849 AP	29	/* Bluetooth control */
	30	static void h1940bt_enable(int on)
	31	{
	32	if (on) {
7fdc7849	33	/* Power on the chip */
14477095	34	gpio_set_value(H1940_LATCH_BLUETOOTH_POWER, 1);
7fdc7849 AP	35	/* Reset the chip */
7fdc7849 AP	36	mdelay(10);
f4146a65 BD	37
f4146a65 BD	38	gpio_set_value(S3C2410_GPH(1), 1);
7fdc7849	39	mdelay(10);
f4146a65	40	gpio_set_value(S3C2410_GPH(1), 0);
50e2d10d VK	41
50e2d10d VK	42	h1940_led_blink_set(-EINVAL, GPIO_LED_BLINK, NULL, NULL);
7fdc7849 AP	43	}
7fdc7849 AP	44	else {
f4146a65	45	gpio_set_value(S3C2410_GPH(1), 1);
7fdc7849	46	mdelay(10);
f4146a65	47	gpio_set_value(S3C2410_GPH(1), 0);
7fdc7849	48	mdelay(10);
14477095	49	gpio_set_value(H1940_LATCH_BLUETOOTH_POWER, 0);
50e2d10d VK	50
50e2d10d VK	51	h1940_led_blink_set(-EINVAL, GPIO_LED_NO_BLINK_LOW, NULL, NULL);
7fdc7849 AP	52	}
	53	}
	54
1a71e4ad	55	static int h1940bt_set_block(void *data, bool blocked)
7fdc7849	56	{
1a71e4ad	57	h1940bt_enable(!blocked);
1a71e4ad	58	return 0;
7fdc7849 AP	59	}
7fdc7849 AP	60
1a71e4ad	61	static const struct rfkill_ops h1940bt_rfkill_ops = {
	62	.set_block = h1940bt_set_block,
	63	};
7fdc7849	64
91a99dfc	65	static int __devinit h1940bt_probe(struct platform_device *pdev)
7fdc7849	66	{
1a71e4ad	67	struct rfkill *rfk;
	68	int ret = 0;
	69
f4146a65 BD	70	ret = gpio_request(S3C2410_GPH(1), dev_name(&pdev->dev));
f4146a65 BD	71	if (ret) {
14477095 VK	72	dev_err(&pdev->dev, "could not get GPH1\n");
	73	return ret;
	74	}
	75
	76	ret = gpio_request(H1940_LATCH_BLUETOOTH_POWER, dev_name(&pdev->dev));
	77	if (ret) {
	78	gpio_free(S3C2410_GPH(1));
	79	dev_err(&pdev->dev, "could not get BT_POWER\n");
f4146a65 BD	80	return ret;
	81	}
	82
7fdc7849	83	/* Configures BT serial port GPIOs */
40b956f0	84	s3c_gpio_cfgpin(S3C2410_GPH(0), S3C2410_GPH0_nCTS0);
6fc50eaf	85	s3c_gpio_setpull(S3C2410_GPH(0), S3C_GPIO_PULL_NONE);
40b956f0	86	s3c_gpio_cfgpin(S3C2410_GPH(1), S3C2410_GPIO_OUTPUT);
6fc50eaf	87	s3c_gpio_setpull(S3C2410_GPH(1), S3C_GPIO_PULL_NONE);
40b956f0	88	s3c_gpio_cfgpin(S3C2410_GPH(2), S3C2410_GPH2_TXD0);
6fc50eaf	89	s3c_gpio_setpull(S3C2410_GPH(2), S3C_GPIO_PULL_NONE);
40b956f0	90	s3c_gpio_cfgpin(S3C2410_GPH(3), S3C2410_GPH3_RXD0);
6fc50eaf	91	s3c_gpio_setpull(S3C2410_GPH(3), S3C_GPIO_PULL_NONE);
7fdc7849	92
1a71e4ad	93	rfk = rfkill_alloc(DRV_NAME, &pdev->dev, RFKILL_TYPE_BLUETOOTH,
	94	&h1940bt_rfkill_ops, NULL);
	95	if (!rfk) {
	96	ret = -ENOMEM;
	97	goto err_rfk_alloc;
	98	}
	99
1a71e4ad	100	ret = rfkill_register(rfk);
	101	if (ret)
	102	goto err_rfkill;
	103
	104	platform_set_drvdata(pdev, rfk);
	105
	106	return 0;
7fdc7849	107
1a71e4ad	108	err_rfkill:
	109	rfkill_destroy(rfk);
	110	err_rfk_alloc:
	111	return ret;
7fdc7849 AP	112	}
	113
	114	static int h1940bt_remove(struct platform_device *pdev)
	115	{
1a71e4ad	116	struct rfkill *rfk = platform_get_drvdata(pdev);
	117
	118	platform_set_drvdata(pdev, NULL);
f4146a65	119	gpio_free(S3C2410_GPH(1));
1a71e4ad	120
	121	if (rfk) {
	122	rfkill_unregister(rfk);
	123	rfkill_destroy(rfk);
	124	}
	125	rfk = NULL;
	126
	127	h1940bt_enable(0);
	128
7fdc7849 AP	129	return 0;
	130	}
	131
	132
	133	static struct platform_driver h1940bt_driver = {
	134	.driver = {
	135	.name = DRV_NAME,
	136	},
	137	.probe = h1940bt_probe,
	138	.remove = h1940bt_remove,
	139	};
	140
1fffc8b2	141	module_platform_driver(h1940bt_driver);
7fdc7849 AP	142
	143	MODULE_AUTHOR("Arnaud Patard <arnaud.patard@rtp-net.org>");
	144	MODULE_DESCRIPTION("Driver for the iPAQ H1940 bluetooth chip");
	145	MODULE_LICENSE("GPL");