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>
19#include <linux/gpio.h>
20#include <linux/rfkill.h>
21
22#include <plat/gpio-cfg.h>
23#include <mach/hardware.h>
24#include <mach/regs-gpio.h>
25#include <mach/gpio-samsung.h>
26
27#include "h1940.h"
28
29#define DRV_NAME "h1940-bt"
30
31/* Bluetooth control */
32static void h1940bt_enable(int on)
33{
34	if (on) {
35		/* Power on the chip */
36		gpio_set_value(H1940_LATCH_BLUETOOTH_POWER, 1);
37		/* Reset the chip */
38		mdelay(10);
39
40		gpio_set_value(S3C2410_GPH(1), 1);
41		mdelay(10);
42		gpio_set_value(S3C2410_GPH(1), 0);
43
44		h1940_led_blink_set(NULL, GPIO_LED_BLINK, NULL, NULL);
45	}
46	else {
47		gpio_set_value(S3C2410_GPH(1), 1);
48		mdelay(10);
49		gpio_set_value(S3C2410_GPH(1), 0);
50		mdelay(10);
51		gpio_set_value(H1940_LATCH_BLUETOOTH_POWER, 0);
52
53		h1940_led_blink_set(NULL, GPIO_LED_NO_BLINK_LOW, NULL, NULL);
54	}
55}
56
57static int h1940bt_set_block(void *data, bool blocked)
58{
59	h1940bt_enable(!blocked);
60	return 0;
61}
62
63static const struct rfkill_ops h1940bt_rfkill_ops = {
64	.set_block = h1940bt_set_block,
65};
66
67static int h1940bt_probe(struct platform_device *pdev)
68{
69	struct rfkill *rfk;
70	int ret = 0;
71
72	ret = gpio_request(S3C2410_GPH(1), dev_name(&pdev->dev));
73	if (ret) {
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");
82		return ret;
83	}
84
85	/* Configures BT serial port GPIOs */
86	s3c_gpio_cfgpin(S3C2410_GPH(0), S3C2410_GPH0_nCTS0);
87	s3c_gpio_setpull(S3C2410_GPH(0), S3C_GPIO_PULL_NONE);
88	s3c_gpio_cfgpin(S3C2410_GPH(1), S3C2410_GPIO_OUTPUT);
89	s3c_gpio_setpull(S3C2410_GPH(1), S3C_GPIO_PULL_NONE);
90	s3c_gpio_cfgpin(S3C2410_GPH(2), S3C2410_GPH2_TXD0);
91	s3c_gpio_setpull(S3C2410_GPH(2), S3C_GPIO_PULL_NONE);
92	s3c_gpio_cfgpin(S3C2410_GPH(3), S3C2410_GPH3_RXD0);
93	s3c_gpio_setpull(S3C2410_GPH(3), S3C_GPIO_PULL_NONE);
94
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
102	ret = rfkill_register(rfk);
103	if (ret)
104		goto err_rfkill;
105
106	platform_set_drvdata(pdev, rfk);
107
108	return 0;
109
110err_rfkill:
111	rfkill_destroy(rfk);
112err_rfk_alloc:
113	return ret;
114}
115
116static int h1940bt_remove(struct platform_device *pdev)
117{
118	struct rfkill *rfk = platform_get_drvdata(pdev);
119
120	platform_set_drvdata(pdev, NULL);
121	gpio_free(S3C2410_GPH(1));
122
123	if (rfk) {
124		rfkill_unregister(rfk);
125		rfkill_destroy(rfk);
126	}
127	rfk = NULL;
128
129	h1940bt_enable(0);
130
131	return 0;
132}
133
134
135static struct platform_driver h1940bt_driver = {
136	.driver		= {
137		.name	= DRV_NAME,
138	},
139	.probe		= h1940bt_probe,
140	.remove		= h1940bt_remove,
141};
142
143module_platform_driver(h1940bt_driver);
144
145MODULE_AUTHOR("Arnaud Patard <arnaud.patard@rtp-net.org>");
146MODULE_DESCRIPTION("Driver for the iPAQ H1940 bluetooth chip");
147MODULE_LICENSE("GPL");
148