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authorDmitry Baryshkov <dbaryshkov@gmail.com>2008-07-05 04:02:48 -0400
committerRussell King <rmk+kernel@arm.linux.org.uk>2008-07-07 08:22:10 -0400
commit16b32fd0a35b30cbd67395cfcbd360354db44f39 (patch)
tree1d4ded0a19ea134a8dd29e33fec07b8712b4f6d7 /arch/arm/mach-pxa/tosa-bt.c
parent5289fecda021828af85fccc8cc2613a85d0fcf52 (diff)
[ARM] 5150/1: Tosa: support built-in bluetooth power-up
The driver is pretty much generic and will be later shared with a few other devices, like hx4700 ipaq. Signed-off-by: Dmitry Baryshkov <dbaryshkov@gmail.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/mach-pxa/tosa-bt.c')
-rw-r--r--arch/arm/mach-pxa/tosa-bt.c150
1 files changed, 150 insertions, 0 deletions
diff --git a/arch/arm/mach-pxa/tosa-bt.c b/arch/arm/mach-pxa/tosa-bt.c
new file mode 100644
index 000000000000..7d8505466e54
--- /dev/null
+++ b/arch/arm/mach-pxa/tosa-bt.c
@@ -0,0 +1,150 @@
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 <asm/arch/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_toggle_radio(void *data, enum rfkill_state state)
39{
40 pr_info("BT_RADIO going: %s\n",
41 state == RFKILL_STATE_ON ? "on" : "off");
42
43 if (state == RFKILL_STATE_ON) {
44 pr_info("TOSA_BT: going ON\n");
45 tosa_bt_on(data);
46 } else {
47 pr_info("TOSA_BT: going OFF\n");
48 tosa_bt_off(data);
49 }
50 return 0;
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_allocate(&dev->dev, RFKILL_TYPE_BLUETOOTH);
74 if (!rfk) {
75 rc = -ENOMEM;
76 goto err_rfk_alloc;
77 }
78
79 rfk->name = "tosa-bt";
80 rfk->toggle_radio = tosa_bt_toggle_radio;
81 rfk->data = data;
82#ifdef CONFIG_RFKILL_LEDS
83 rfk->led_trigger.name = "tosa-bt";
84#endif
85
86 rc = rfkill_register(rfk);
87 if (rc)
88 goto err_rfkill;
89
90 platform_set_drvdata(dev, rfk);
91
92 return 0;
93
94err_rfkill:
95 if (rfk)
96 rfkill_free(rfk);
97 rfk = NULL;
98err_rfk_alloc:
99 tosa_bt_off(data);
100err_pwr_dir:
101 gpio_free(data->gpio_pwr);
102err_pwr:
103err_reset_dir:
104 gpio_free(data->gpio_reset);
105err_reset:
106 return rc;
107}
108
109static int __devexit tosa_bt_remove(struct platform_device *dev)
110{
111 struct tosa_bt_data *data = dev->dev.platform_data;
112 struct rfkill *rfk = platform_get_drvdata(dev);
113
114 platform_set_drvdata(dev, NULL);
115
116 if (rfk)
117 rfkill_unregister(rfk);
118 rfk = NULL;
119
120 tosa_bt_off(data);
121
122 gpio_free(data->gpio_pwr);
123 gpio_free(data->gpio_reset);
124
125 return 0;
126}
127
128static struct platform_driver tosa_bt_driver = {
129 .probe = tosa_bt_probe,
130 .remove = __devexit_p(tosa_bt_remove),
131
132 .driver = {
133 .name = "tosa-bt",
134 .owner = THIS_MODULE,
135 },
136};
137
138
139static int __init tosa_bt_init(void)
140{
141 return platform_driver_register(&tosa_bt_driver);
142}
143
144static void __exit tosa_bt_exit(void)
145{
146 platform_driver_unregister(&tosa_bt_driver);
147}
148
149module_init(tosa_bt_init);
150module_exit(tosa_bt_exit);