1/*
2 * Bluetooth built-in chip control
3 *
4 * Copyright (c) 2008 Dmitry Baryshkov
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 *
10 */
11
12#include <linux/kernel.h>
13#include <linux/module.h>
14#include <linux/platform_device.h>
15#include <linux/gpio.h>
16#include <linux/delay.h>
17#include <linux/rfkill.h>
18
19#include <mach/tosa_bt.h>
20
21static void tosa_bt_on(struct tosa_bt_data *data)
22{
23	gpio_set_value(data->gpio_reset, 0);
24	gpio_set_value(data->gpio_pwr, 1);
25	gpio_set_value(data->gpio_reset, 1);
26	mdelay(20);
27	gpio_set_value(data->gpio_reset, 0);
28}
29
30static void tosa_bt_off(struct tosa_bt_data *data)
31{
32	gpio_set_value(data->gpio_reset, 1);
33	mdelay(10);
34	gpio_set_value(data->gpio_pwr, 0);
35	gpio_set_value(data->gpio_reset, 0);
36}
37
38static int tosa_bt_set_block(void *data, bool blocked)
39{
40	pr_info("BT_RADIO going: %s\n", blocked ? "off" : "on");
41
42	if (!blocked) {
43		pr_info("TOSA_BT: going ON\n");
44		tosa_bt_on(data);
45	} else {
46		pr_info("TOSA_BT: going OFF\n");
47		tosa_bt_off(data);
48	}
49
50	return 0;
51}
52
53static const struct rfkill_ops tosa_bt_rfkill_ops = {
54	.set_block = tosa_bt_set_block,
55};
56
57static int tosa_bt_probe(struct platform_device *dev)
58{
59	int rc;
60	struct rfkill *rfk;
61
62	struct tosa_bt_data *data = dev->dev.platform_data;
63
64	rc = gpio_request(data->gpio_reset, "Bluetooth reset");
65	if (rc)
66		goto err_reset;
67	rc = gpio_direction_output(data->gpio_reset, 0);
68	if (rc)
69		goto err_reset_dir;
70	rc = gpio_request(data->gpio_pwr, "Bluetooth power");
71	if (rc)
72		goto err_pwr;
73	rc = gpio_direction_output(data->gpio_pwr, 0);
74	if (rc)
75		goto err_pwr_dir;
76
77	rfk = rfkill_alloc("tosa-bt", &dev->dev, RFKILL_TYPE_BLUETOOTH,
78			   &tosa_bt_rfkill_ops, data);
79	if (!rfk) {
80		rc = -ENOMEM;
81		goto err_rfk_alloc;
82	}
83
84	rc = rfkill_register(rfk);
85	if (rc)
86		goto err_rfkill;
87
88	platform_set_drvdata(dev, rfk);
89
90	return 0;
91
92err_rfkill:
93	rfkill_destroy(rfk);
94err_rfk_alloc:
95	tosa_bt_off(data);
96err_pwr_dir:
97	gpio_free(data->gpio_pwr);
98err_pwr:
99err_reset_dir:
100	gpio_free(data->gpio_reset);
101err_reset:
102	return rc;
103}
104
105static int tosa_bt_remove(struct platform_device *dev)
106{
107	struct tosa_bt_data *data = dev->dev.platform_data;
108	struct rfkill *rfk = platform_get_drvdata(dev);
109
110	platform_set_drvdata(dev, NULL);
111
112	if (rfk) {
113		rfkill_unregister(rfk);
114		rfkill_destroy(rfk);
115	}
116	rfk = NULL;
117
118	tosa_bt_off(data);
119
120	gpio_free(data->gpio_pwr);
121	gpio_free(data->gpio_reset);
122
123	return 0;
124}
125
126static struct platform_driver tosa_bt_driver = {
127	.probe = tosa_bt_probe,
128	.remove = tosa_bt_remove,
129
130	.driver = {
131		.name = "tosa-bt",
132	},
133};
134
135
136static int __init tosa_bt_init(void)
137{
138	return platform_driver_register(&tosa_bt_driver);
139}
140
141static void __exit tosa_bt_exit(void)
142{
143	platform_driver_unregister(&tosa_bt_driver);
144}
145
146module_init(tosa_bt_init);
147module_exit(tosa_bt_exit);
148