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1/*
2 * Toshiba Bluetooth Enable Driver
3 *
4 * Copyright (C) 2009 Jes Sorensen <Jes.Sorensen@gmail.com>
5 *
6 * Thanks to Matthew Garrett for background info on ACPI innards which
7 * normal people aren't meant to understand :-)
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 *
13 * Note the Toshiba Bluetooth RFKill switch seems to be a strange
14 * fish. It only provides a BT event when the switch is flipped to
15 * the 'on' position. When flipping it to 'off', the USB device is
16 * simply pulled away underneath us, without any BT event being
17 * delivered.
18 */
19
20#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
21
22#include <linux/kernel.h>
23#include <linux/module.h>
24#include <linux/init.h>
25#include <linux/types.h>
26#include <acpi/acpi_bus.h>
27#include <acpi/acpi_drivers.h>
28
29MODULE_AUTHOR("Jes Sorensen <Jes.Sorensen@gmail.com>");
30MODULE_DESCRIPTION("Toshiba Laptop ACPI Bluetooth Enable Driver");
31MODULE_LICENSE("GPL");
32
33
34static int toshiba_bt_rfkill_add(struct acpi_device *device);
35static int toshiba_bt_rfkill_remove(struct acpi_device *device, int type);
36static void toshiba_bt_rfkill_notify(struct acpi_device *device, u32 event);
37static int toshiba_bt_resume(struct acpi_device *device);
38
39static const struct acpi_device_id bt_device_ids[] = {
40 { "TOS6205", 0},
41 { "", 0},
42};
43MODULE_DEVICE_TABLE(acpi, bt_device_ids);
44
45static struct acpi_driver toshiba_bt_rfkill_driver = {
46 .name = "Toshiba BT",
47 .class = "Toshiba",
48 .ids = bt_device_ids,
49 .ops = {
50 .add = toshiba_bt_rfkill_add,
51 .remove = toshiba_bt_rfkill_remove,
52 .notify = toshiba_bt_rfkill_notify,
53 .resume = toshiba_bt_resume,
54 },
55 .owner = THIS_MODULE,
56};
57
58
59static int toshiba_bluetooth_enable(acpi_handle handle)
60{
61 acpi_status res1, res2;
62 u64 result;
63
64 /*
65 * Query ACPI to verify RFKill switch is set to 'on'.
66 * If not, we return silently, no need to report it as
67 * an error.
68 */
69 res1 = acpi_evaluate_integer(handle, "BTST", NULL, &result);
70 if (ACPI_FAILURE(res1))
71 return res1;
72 if (!(result & 0x01))
73 return 0;
74
75 pr_info("Re-enabling Toshiba Bluetooth\n");
76 res1 = acpi_evaluate_object(handle, "AUSB", NULL, NULL);
77 res2 = acpi_evaluate_object(handle, "BTPO", NULL, NULL);
78 if (!ACPI_FAILURE(res1) || !ACPI_FAILURE(res2))
79 return 0;
80
81 pr_warn("Failed to re-enable Toshiba Bluetooth\n");
82
83 return -ENODEV;
84}
85
86static void toshiba_bt_rfkill_notify(struct acpi_device *device, u32 event)
87{
88 toshiba_bluetooth_enable(device->handle);
89}
90
91static int toshiba_bt_resume(struct acpi_device *device)
92{
93 return toshiba_bluetooth_enable(device->handle);
94}
95
96static int toshiba_bt_rfkill_add(struct acpi_device *device)
97{
98 acpi_status status;
99 u64 bt_present;
100 int result = -ENODEV;
101
102 /*
103 * Some Toshiba laptops may have a fake TOS6205 device in
104 * their ACPI BIOS, so query the _STA method to see if there
105 * is really anything there, before trying to enable it.
106 */
107 status = acpi_evaluate_integer(device->handle, "_STA", NULL,
108 &bt_present);
109
110 if (!ACPI_FAILURE(status) && bt_present) {
111 pr_info("Detected Toshiba ACPI Bluetooth device - "
112 "installing RFKill handler\n");
113 result = toshiba_bluetooth_enable(device->handle);
114 }
115
116 return result;
117}
118
119static int __init toshiba_bt_rfkill_init(void)
120{
121 int result;
122
123 result = acpi_bus_register_driver(&toshiba_bt_rfkill_driver);
124 if (result < 0) {
125 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
126 "Error registering driver\n"));
127 return result;
128 }
129
130 return 0;
131}
132
133static int toshiba_bt_rfkill_remove(struct acpi_device *device, int type)
134{
135 /* clean up */
136 return 0;
137}
138
139static void __exit toshiba_bt_rfkill_exit(void)
140{
141 acpi_bus_unregister_driver(&toshiba_bt_rfkill_driver);
142}
143
144module_init(toshiba_bt_rfkill_init);
145module_exit(toshiba_bt_rfkill_exit);
1/*
2 * Toshiba Bluetooth Enable Driver
3 *
4 * Copyright (C) 2009 Jes Sorensen <Jes.Sorensen@gmail.com>
5 *
6 * Thanks to Matthew Garrett for background info on ACPI innards which
7 * normal people aren't meant to understand :-)
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 *
13 * Note the Toshiba Bluetooth RFKill switch seems to be a strange
14 * fish. It only provides a BT event when the switch is flipped to
15 * the 'on' position. When flipping it to 'off', the USB device is
16 * simply pulled away underneath us, without any BT event being
17 * delivered.
18 */
19
20#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
21
22#include <linux/kernel.h>
23#include <linux/module.h>
24#include <linux/init.h>
25#include <linux/types.h>
26#include <linux/acpi.h>
27
28MODULE_AUTHOR("Jes Sorensen <Jes.Sorensen@gmail.com>");
29MODULE_DESCRIPTION("Toshiba Laptop ACPI Bluetooth Enable Driver");
30MODULE_LICENSE("GPL");
31
32static int toshiba_bt_rfkill_add(struct acpi_device *device);
33static int toshiba_bt_rfkill_remove(struct acpi_device *device);
34static void toshiba_bt_rfkill_notify(struct acpi_device *device, u32 event);
35
36static const struct acpi_device_id bt_device_ids[] = {
37 { "TOS6205", 0},
38 { "", 0},
39};
40MODULE_DEVICE_TABLE(acpi, bt_device_ids);
41
42#ifdef CONFIG_PM_SLEEP
43static int toshiba_bt_resume(struct device *dev);
44#endif
45static SIMPLE_DEV_PM_OPS(toshiba_bt_pm, NULL, toshiba_bt_resume);
46
47static struct acpi_driver toshiba_bt_rfkill_driver = {
48 .name = "Toshiba BT",
49 .class = "Toshiba",
50 .ids = bt_device_ids,
51 .ops = {
52 .add = toshiba_bt_rfkill_add,
53 .remove = toshiba_bt_rfkill_remove,
54 .notify = toshiba_bt_rfkill_notify,
55 },
56 .owner = THIS_MODULE,
57 .drv.pm = &toshiba_bt_pm,
58};
59
60
61static int toshiba_bluetooth_enable(acpi_handle handle)
62{
63 acpi_status res1, res2;
64 u64 result;
65
66 /*
67 * Query ACPI to verify RFKill switch is set to 'on'.
68 * If not, we return silently, no need to report it as
69 * an error.
70 */
71 res1 = acpi_evaluate_integer(handle, "BTST", NULL, &result);
72 if (ACPI_FAILURE(res1))
73 return res1;
74 if (!(result & 0x01))
75 return 0;
76
77 pr_info("Re-enabling Toshiba Bluetooth\n");
78 res1 = acpi_evaluate_object(handle, "AUSB", NULL, NULL);
79 res2 = acpi_evaluate_object(handle, "BTPO", NULL, NULL);
80 if (!ACPI_FAILURE(res1) || !ACPI_FAILURE(res2))
81 return 0;
82
83 pr_warn("Failed to re-enable Toshiba Bluetooth\n");
84
85 return -ENODEV;
86}
87
88static void toshiba_bt_rfkill_notify(struct acpi_device *device, u32 event)
89{
90 toshiba_bluetooth_enable(device->handle);
91}
92
93#ifdef CONFIG_PM_SLEEP
94static int toshiba_bt_resume(struct device *dev)
95{
96 return toshiba_bluetooth_enable(to_acpi_device(dev)->handle);
97}
98#endif
99
100static int toshiba_bt_rfkill_add(struct acpi_device *device)
101{
102 acpi_status status;
103 u64 bt_present;
104 int result = -ENODEV;
105
106 /*
107 * Some Toshiba laptops may have a fake TOS6205 device in
108 * their ACPI BIOS, so query the _STA method to see if there
109 * is really anything there, before trying to enable it.
110 */
111 status = acpi_evaluate_integer(device->handle, "_STA", NULL,
112 &bt_present);
113
114 if (!ACPI_FAILURE(status) && bt_present) {
115 pr_info("Detected Toshiba ACPI Bluetooth device - "
116 "installing RFKill handler\n");
117 result = toshiba_bluetooth_enable(device->handle);
118 }
119
120 return result;
121}
122
123static int toshiba_bt_rfkill_remove(struct acpi_device *device)
124{
125 /* clean up */
126 return 0;
127}
128
129module_acpi_driver(toshiba_bt_rfkill_driver);