Commit | Line | Data |
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42b4e9ee JS |
1 | /* |
2 | * Toshiba Bluetooth Enable Driver | |
3 | * | |
4 | * Copyright (C) 2009 Jes Sorensen <Jes.Sorensen@gmail.com> | |
5d3fc1d5 | 5 | * Copyright (C) 2015 Azael Avalos <coproscefalo@gmail.com> |
42b4e9ee JS |
6 | * |
7 | * Thanks to Matthew Garrett for background info on ACPI innards which | |
8 | * normal people aren't meant to understand :-) | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License version 2 as | |
12 | * published by the Free Software Foundation. | |
42b4e9ee JS |
13 | */ |
14 | ||
7e33460d JP |
15 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
16 | ||
42b4e9ee JS |
17 | #include <linux/kernel.h> |
18 | #include <linux/module.h> | |
19 | #include <linux/init.h> | |
20 | #include <linux/types.h> | |
8b48463f | 21 | #include <linux/acpi.h> |
7ee8cd33 | 22 | #include <linux/rfkill.h> |
42b4e9ee | 23 | |
5d3fc1d5 AA |
24 | #define BT_KILLSWITCH_MASK 0x01 |
25 | #define BT_PLUGGED_MASK 0x40 | |
26 | #define BT_POWER_MASK 0x80 | |
27 | ||
42b4e9ee JS |
28 | MODULE_AUTHOR("Jes Sorensen <Jes.Sorensen@gmail.com>"); |
29 | MODULE_DESCRIPTION("Toshiba Laptop ACPI Bluetooth Enable Driver"); | |
30 | MODULE_LICENSE("GPL"); | |
31 | ||
84c0691e AA |
32 | struct toshiba_bluetooth_dev { |
33 | struct acpi_device *acpi_dev; | |
7ee8cd33 | 34 | struct rfkill *rfk; |
84c0691e AA |
35 | |
36 | bool killswitch; | |
37 | bool plugged; | |
38 | bool powered; | |
39 | }; | |
40 | ||
42b4e9ee | 41 | static int toshiba_bt_rfkill_add(struct acpi_device *device); |
51fac838 | 42 | static int toshiba_bt_rfkill_remove(struct acpi_device *device); |
42b4e9ee | 43 | static void toshiba_bt_rfkill_notify(struct acpi_device *device, u32 event); |
42b4e9ee JS |
44 | |
45 | static const struct acpi_device_id bt_device_ids[] = { | |
46 | { "TOS6205", 0}, | |
47 | { "", 0}, | |
48 | }; | |
49 | MODULE_DEVICE_TABLE(acpi, bt_device_ids); | |
50 | ||
3567a4e2 | 51 | #ifdef CONFIG_PM_SLEEP |
d69239ae | 52 | static int toshiba_bt_resume(struct device *dev); |
3567a4e2 | 53 | #endif |
d69239ae RW |
54 | static SIMPLE_DEV_PM_OPS(toshiba_bt_pm, NULL, toshiba_bt_resume); |
55 | ||
42b4e9ee JS |
56 | static struct acpi_driver toshiba_bt_rfkill_driver = { |
57 | .name = "Toshiba BT", | |
58 | .class = "Toshiba", | |
59 | .ids = bt_device_ids, | |
60 | .ops = { | |
61 | .add = toshiba_bt_rfkill_add, | |
62 | .remove = toshiba_bt_rfkill_remove, | |
63 | .notify = toshiba_bt_rfkill_notify, | |
42b4e9ee JS |
64 | }, |
65 | .owner = THIS_MODULE, | |
d69239ae | 66 | .drv.pm = &toshiba_bt_pm, |
42b4e9ee JS |
67 | }; |
68 | ||
bb2ea96b AA |
69 | static int toshiba_bluetooth_present(acpi_handle handle) |
70 | { | |
71 | acpi_status result; | |
72 | u64 bt_present; | |
73 | ||
18b8696b AA |
74 | /* |
75 | * Some Toshiba laptops may have a fake TOS6205 device in | |
76 | * their ACPI BIOS, so query the _STA method to see if there | |
77 | * is really anything there. | |
78 | */ | |
bb2ea96b AA |
79 | result = acpi_evaluate_integer(handle, "_STA", NULL, &bt_present); |
80 | if (ACPI_FAILURE(result)) { | |
260e0eca | 81 | pr_err("ACPI call to query Bluetooth presence failed\n"); |
bb2ea96b AA |
82 | return -ENXIO; |
83 | } else if (!bt_present) { | |
84 | pr_info("Bluetooth device not present\n"); | |
85 | return -ENODEV; | |
86 | } | |
87 | ||
88 | return 0; | |
89 | } | |
90 | ||
91 | static int toshiba_bluetooth_status(acpi_handle handle) | |
92 | { | |
93 | acpi_status result; | |
94 | u64 status; | |
95 | ||
96 | result = acpi_evaluate_integer(handle, "BTST", NULL, &status); | |
97 | if (ACPI_FAILURE(result)) { | |
98 | pr_err("Could not get Bluetooth device status\n"); | |
99 | return -ENXIO; | |
100 | } | |
101 | ||
bb2ea96b AA |
102 | return status; |
103 | } | |
42b4e9ee JS |
104 | |
105 | static int toshiba_bluetooth_enable(acpi_handle handle) | |
106 | { | |
5d3fc1d5 | 107 | acpi_status result; |
42b4e9ee | 108 | |
5d3fc1d5 AA |
109 | result = acpi_evaluate_object(handle, "AUSB", NULL, NULL); |
110 | if (ACPI_FAILURE(result)) { | |
111 | pr_err("Could not attach USB Bluetooth device\n"); | |
112 | return -ENXIO; | |
113 | } | |
42b4e9ee | 114 | |
5d3fc1d5 AA |
115 | result = acpi_evaluate_object(handle, "BTPO", NULL, NULL); |
116 | if (ACPI_FAILURE(result)) { | |
117 | pr_err("Could not power ON Bluetooth device\n"); | |
118 | return -ENXIO; | |
119 | } | |
120 | ||
121 | return 0; | |
42b4e9ee JS |
122 | } |
123 | ||
bb2ea96b AA |
124 | static int toshiba_bluetooth_disable(acpi_handle handle) |
125 | { | |
126 | acpi_status result; | |
127 | ||
128 | result = acpi_evaluate_object(handle, "BTPF", NULL, NULL); | |
129 | if (ACPI_FAILURE(result)) { | |
130 | pr_err("Could not power OFF Bluetooth device\n"); | |
131 | return -ENXIO; | |
132 | } | |
133 | ||
134 | result = acpi_evaluate_object(handle, "DUSB", NULL, NULL); | |
135 | if (ACPI_FAILURE(result)) { | |
136 | pr_err("Could not detach USB Bluetooth device\n"); | |
137 | return -ENXIO; | |
138 | } | |
139 | ||
140 | return 0; | |
141 | } | |
142 | ||
84c0691e AA |
143 | /* Helper function */ |
144 | static int toshiba_bluetooth_sync_status(struct toshiba_bluetooth_dev *bt_dev) | |
145 | { | |
146 | int status; | |
147 | ||
148 | status = toshiba_bluetooth_status(bt_dev->acpi_dev->handle); | |
149 | if (status < 0) { | |
150 | pr_err("Could not sync bluetooth device status\n"); | |
151 | return status; | |
152 | } | |
153 | ||
154 | bt_dev->killswitch = (status & BT_KILLSWITCH_MASK) ? true : false; | |
155 | bt_dev->plugged = (status & BT_PLUGGED_MASK) ? true : false; | |
156 | bt_dev->powered = (status & BT_POWER_MASK) ? true : false; | |
157 | ||
8798df88 AA |
158 | pr_debug("Bluetooth status %d killswitch %d plugged %d powered %d\n", |
159 | status, bt_dev->killswitch, bt_dev->plugged, bt_dev->powered); | |
160 | ||
84c0691e AA |
161 | return 0; |
162 | } | |
163 | ||
7ee8cd33 AA |
164 | /* RFKill handlers */ |
165 | static int bt_rfkill_set_block(void *data, bool blocked) | |
166 | { | |
167 | struct toshiba_bluetooth_dev *bt_dev = data; | |
168 | int ret; | |
169 | ||
170 | ret = toshiba_bluetooth_sync_status(bt_dev); | |
171 | if (ret) | |
172 | return ret; | |
173 | ||
174 | if (!bt_dev->killswitch) | |
175 | return 0; | |
176 | ||
177 | if (blocked) | |
178 | ret = toshiba_bluetooth_disable(bt_dev->acpi_dev->handle); | |
179 | else | |
180 | ret = toshiba_bluetooth_enable(bt_dev->acpi_dev->handle); | |
181 | ||
182 | return ret; | |
183 | } | |
184 | ||
185 | static void bt_rfkill_poll(struct rfkill *rfkill, void *data) | |
186 | { | |
187 | struct toshiba_bluetooth_dev *bt_dev = data; | |
188 | ||
189 | if (toshiba_bluetooth_sync_status(bt_dev)) | |
190 | return; | |
191 | ||
192 | /* | |
193 | * Note the Toshiba Bluetooth RFKill switch seems to be a strange | |
194 | * fish. It only provides a BT event when the switch is flipped to | |
195 | * the 'on' position. When flipping it to 'off', the USB device is | |
196 | * simply pulled away underneath us, without any BT event being | |
197 | * delivered. | |
198 | */ | |
199 | rfkill_set_hw_state(bt_dev->rfk, !bt_dev->killswitch); | |
200 | } | |
201 | ||
202 | static const struct rfkill_ops rfk_ops = { | |
203 | .set_block = bt_rfkill_set_block, | |
204 | .poll = bt_rfkill_poll, | |
205 | }; | |
206 | ||
84c0691e | 207 | /* ACPI driver functions */ |
42b4e9ee JS |
208 | static void toshiba_bt_rfkill_notify(struct acpi_device *device, u32 event) |
209 | { | |
d85b11b1 AA |
210 | struct toshiba_bluetooth_dev *bt_dev = acpi_driver_data(device); |
211 | ||
212 | if (toshiba_bluetooth_sync_status(bt_dev)) | |
213 | return; | |
214 | ||
215 | rfkill_set_hw_state(bt_dev->rfk, !bt_dev->killswitch); | |
42b4e9ee JS |
216 | } |
217 | ||
3567a4e2 | 218 | #ifdef CONFIG_PM_SLEEP |
d69239ae | 219 | static int toshiba_bt_resume(struct device *dev) |
42b4e9ee | 220 | { |
d85b11b1 AA |
221 | struct toshiba_bluetooth_dev *bt_dev; |
222 | int ret; | |
223 | ||
224 | bt_dev = acpi_driver_data(to_acpi_device(dev)); | |
225 | ||
226 | ret = toshiba_bluetooth_sync_status(bt_dev); | |
227 | if (ret) | |
228 | return ret; | |
229 | ||
230 | rfkill_set_hw_state(bt_dev->rfk, !bt_dev->killswitch); | |
231 | ||
232 | return 0; | |
42b4e9ee | 233 | } |
3567a4e2 | 234 | #endif |
42b4e9ee JS |
235 | |
236 | static int toshiba_bt_rfkill_add(struct acpi_device *device) | |
237 | { | |
84c0691e | 238 | struct toshiba_bluetooth_dev *bt_dev; |
18b8696b | 239 | int result; |
42b4e9ee | 240 | |
18b8696b AA |
241 | result = toshiba_bluetooth_present(device->handle); |
242 | if (result) | |
243 | return result; | |
42b4e9ee | 244 | |
18b8696b AA |
245 | pr_info("Toshiba ACPI Bluetooth device driver\n"); |
246 | ||
84c0691e AA |
247 | bt_dev = kzalloc(sizeof(*bt_dev), GFP_KERNEL); |
248 | if (!bt_dev) | |
249 | return -ENOMEM; | |
250 | bt_dev->acpi_dev = device; | |
251 | device->driver_data = bt_dev; | |
252 | dev_set_drvdata(&device->dev, bt_dev); | |
253 | ||
254 | result = toshiba_bluetooth_sync_status(bt_dev); | |
255 | if (result) { | |
256 | kfree(bt_dev); | |
257 | return result; | |
258 | } | |
259 | ||
7ee8cd33 AA |
260 | bt_dev->rfk = rfkill_alloc("Toshiba Bluetooth", |
261 | &device->dev, | |
262 | RFKILL_TYPE_BLUETOOTH, | |
263 | &rfk_ops, | |
264 | bt_dev); | |
265 | if (!bt_dev->rfk) { | |
266 | pr_err("Unable to allocate rfkill device\n"); | |
267 | kfree(bt_dev); | |
268 | return -ENOMEM; | |
269 | } | |
270 | ||
271 | rfkill_set_hw_state(bt_dev->rfk, !bt_dev->killswitch); | |
272 | ||
273 | result = rfkill_register(bt_dev->rfk); | |
274 | if (result) { | |
275 | pr_err("Unable to register rfkill device\n"); | |
276 | rfkill_destroy(bt_dev->rfk); | |
84c0691e | 277 | kfree(bt_dev); |
7ee8cd33 | 278 | } |
42b4e9ee JS |
279 | |
280 | return result; | |
281 | } | |
282 | ||
51fac838 | 283 | static int toshiba_bt_rfkill_remove(struct acpi_device *device) |
42b4e9ee | 284 | { |
84c0691e AA |
285 | struct toshiba_bluetooth_dev *bt_dev = acpi_driver_data(device); |
286 | ||
42b4e9ee | 287 | /* clean up */ |
7ee8cd33 AA |
288 | if (bt_dev->rfk) { |
289 | rfkill_unregister(bt_dev->rfk); | |
290 | rfkill_destroy(bt_dev->rfk); | |
291 | } | |
292 | ||
84c0691e AA |
293 | kfree(bt_dev); |
294 | ||
18b8696b | 295 | return toshiba_bluetooth_disable(device->handle); |
42b4e9ee JS |
296 | } |
297 | ||
01d17753 | 298 | module_acpi_driver(toshiba_bt_rfkill_driver); |