Loading...
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 .owner = THIS_MODULE,
133 },
134};
135
136
137static int __init tosa_bt_init(void)
138{
139 return platform_driver_register(&tosa_bt_driver);
140}
141
142static void __exit tosa_bt_exit(void)
143{
144 platform_driver_unregister(&tosa_bt_driver);
145}
146
147module_init(tosa_bt_init);
148module_exit(tosa_bt_exit);
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Bluetooth built-in chip control
4 *
5 * Copyright (c) 2008 Dmitry Baryshkov
6 */
7
8#include <linux/kernel.h>
9#include <linux/module.h>
10#include <linux/platform_device.h>
11#include <linux/gpio.h>
12#include <linux/delay.h>
13#include <linux/rfkill.h>
14
15#include "tosa_bt.h"
16
17static void tosa_bt_on(struct tosa_bt_data *data)
18{
19 gpio_set_value(data->gpio_reset, 0);
20 gpio_set_value(data->gpio_pwr, 1);
21 gpio_set_value(data->gpio_reset, 1);
22 mdelay(20);
23 gpio_set_value(data->gpio_reset, 0);
24}
25
26static void tosa_bt_off(struct tosa_bt_data *data)
27{
28 gpio_set_value(data->gpio_reset, 1);
29 mdelay(10);
30 gpio_set_value(data->gpio_pwr, 0);
31 gpio_set_value(data->gpio_reset, 0);
32}
33
34static int tosa_bt_set_block(void *data, bool blocked)
35{
36 pr_info("BT_RADIO going: %s\n", blocked ? "off" : "on");
37
38 if (!blocked) {
39 pr_info("TOSA_BT: going ON\n");
40 tosa_bt_on(data);
41 } else {
42 pr_info("TOSA_BT: going OFF\n");
43 tosa_bt_off(data);
44 }
45
46 return 0;
47}
48
49static const struct rfkill_ops tosa_bt_rfkill_ops = {
50 .set_block = tosa_bt_set_block,
51};
52
53static int tosa_bt_probe(struct platform_device *dev)
54{
55 int rc;
56 struct rfkill *rfk;
57
58 struct tosa_bt_data *data = dev->dev.platform_data;
59
60 rc = gpio_request(data->gpio_reset, "Bluetooth reset");
61 if (rc)
62 goto err_reset;
63 rc = gpio_direction_output(data->gpio_reset, 0);
64 if (rc)
65 goto err_reset_dir;
66 rc = gpio_request(data->gpio_pwr, "Bluetooth power");
67 if (rc)
68 goto err_pwr;
69 rc = gpio_direction_output(data->gpio_pwr, 0);
70 if (rc)
71 goto err_pwr_dir;
72
73 rfk = rfkill_alloc("tosa-bt", &dev->dev, RFKILL_TYPE_BLUETOOTH,
74 &tosa_bt_rfkill_ops, data);
75 if (!rfk) {
76 rc = -ENOMEM;
77 goto err_rfk_alloc;
78 }
79
80 rc = rfkill_register(rfk);
81 if (rc)
82 goto err_rfkill;
83
84 platform_set_drvdata(dev, rfk);
85
86 return 0;
87
88err_rfkill:
89 rfkill_destroy(rfk);
90err_rfk_alloc:
91 tosa_bt_off(data);
92err_pwr_dir:
93 gpio_free(data->gpio_pwr);
94err_pwr:
95err_reset_dir:
96 gpio_free(data->gpio_reset);
97err_reset:
98 return rc;
99}
100
101static int tosa_bt_remove(struct platform_device *dev)
102{
103 struct tosa_bt_data *data = dev->dev.platform_data;
104 struct rfkill *rfk = platform_get_drvdata(dev);
105
106 platform_set_drvdata(dev, NULL);
107
108 if (rfk) {
109 rfkill_unregister(rfk);
110 rfkill_destroy(rfk);
111 }
112 rfk = NULL;
113
114 tosa_bt_off(data);
115
116 gpio_free(data->gpio_pwr);
117 gpio_free(data->gpio_reset);
118
119 return 0;
120}
121
122static struct platform_driver tosa_bt_driver = {
123 .probe = tosa_bt_probe,
124 .remove = tosa_bt_remove,
125
126 .driver = {
127 .name = "tosa-bt",
128 },
129};
130module_platform_driver(tosa_bt_driver);
131
132MODULE_LICENSE("GPL");
133MODULE_AUTHOR("Dmitry Baryshkov");
134MODULE_DESCRIPTION("Bluetooth built-in chip control");