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 | 82 | return -ENXIO; |
28e476d7 AA |
83 | } |
84 | ||
85 | if (!bt_present) { | |
bb2ea96b AA |
86 | pr_info("Bluetooth device not present\n"); |
87 | return -ENODEV; | |
88 | } | |
89 | ||
90 | return 0; | |
91 | } | |
92 | ||
93 | static int toshiba_bluetooth_status(acpi_handle handle) | |
94 | { | |
95 | acpi_status result; | |
96 | u64 status; | |
97 | ||
98 | result = acpi_evaluate_integer(handle, "BTST", NULL, &status); | |
99 | if (ACPI_FAILURE(result)) { | |
100 | pr_err("Could not get Bluetooth device status\n"); | |
101 | return -ENXIO; | |
102 | } | |
103 | ||
bb2ea96b AA |
104 | return status; |
105 | } | |
42b4e9ee JS |
106 | |
107 | static int toshiba_bluetooth_enable(acpi_handle handle) | |
108 | { | |
5d3fc1d5 | 109 | acpi_status result; |
42b4e9ee | 110 | |
5d3fc1d5 AA |
111 | result = acpi_evaluate_object(handle, "AUSB", NULL, NULL); |
112 | if (ACPI_FAILURE(result)) { | |
113 | pr_err("Could not attach USB Bluetooth device\n"); | |
114 | return -ENXIO; | |
115 | } | |
42b4e9ee | 116 | |
5d3fc1d5 AA |
117 | result = acpi_evaluate_object(handle, "BTPO", NULL, NULL); |
118 | if (ACPI_FAILURE(result)) { | |
119 | pr_err("Could not power ON Bluetooth device\n"); | |
120 | return -ENXIO; | |
121 | } | |
122 | ||
123 | return 0; | |
42b4e9ee JS |
124 | } |
125 | ||
bb2ea96b AA |
126 | static int toshiba_bluetooth_disable(acpi_handle handle) |
127 | { | |
128 | acpi_status result; | |
129 | ||
130 | result = acpi_evaluate_object(handle, "BTPF", NULL, NULL); | |
131 | if (ACPI_FAILURE(result)) { | |
132 | pr_err("Could not power OFF Bluetooth device\n"); | |
133 | return -ENXIO; | |
134 | } | |
135 | ||
136 | result = acpi_evaluate_object(handle, "DUSB", NULL, NULL); | |
137 | if (ACPI_FAILURE(result)) { | |
138 | pr_err("Could not detach USB Bluetooth device\n"); | |
139 | return -ENXIO; | |
140 | } | |
141 | ||
142 | return 0; | |
143 | } | |
144 | ||
84c0691e AA |
145 | /* Helper function */ |
146 | static int toshiba_bluetooth_sync_status(struct toshiba_bluetooth_dev *bt_dev) | |
147 | { | |
148 | int status; | |
149 | ||
150 | status = toshiba_bluetooth_status(bt_dev->acpi_dev->handle); | |
151 | if (status < 0) { | |
152 | pr_err("Could not sync bluetooth device status\n"); | |
153 | return status; | |
154 | } | |
155 | ||
156 | bt_dev->killswitch = (status & BT_KILLSWITCH_MASK) ? true : false; | |
157 | bt_dev->plugged = (status & BT_PLUGGED_MASK) ? true : false; | |
158 | bt_dev->powered = (status & BT_POWER_MASK) ? true : false; | |
159 | ||
8798df88 AA |
160 | pr_debug("Bluetooth status %d killswitch %d plugged %d powered %d\n", |
161 | status, bt_dev->killswitch, bt_dev->plugged, bt_dev->powered); | |
162 | ||
84c0691e AA |
163 | return 0; |
164 | } | |
165 | ||
7ee8cd33 AA |
166 | /* RFKill handlers */ |
167 | static int bt_rfkill_set_block(void *data, bool blocked) | |
168 | { | |
169 | struct toshiba_bluetooth_dev *bt_dev = data; | |
170 | int ret; | |
171 | ||
172 | ret = toshiba_bluetooth_sync_status(bt_dev); | |
173 | if (ret) | |
174 | return ret; | |
175 | ||
176 | if (!bt_dev->killswitch) | |
177 | return 0; | |
178 | ||
179 | if (blocked) | |
180 | ret = toshiba_bluetooth_disable(bt_dev->acpi_dev->handle); | |
181 | else | |
182 | ret = toshiba_bluetooth_enable(bt_dev->acpi_dev->handle); | |
183 | ||
184 | return ret; | |
185 | } | |
186 | ||
187 | static void bt_rfkill_poll(struct rfkill *rfkill, void *data) | |
188 | { | |
189 | struct toshiba_bluetooth_dev *bt_dev = data; | |
190 | ||
191 | if (toshiba_bluetooth_sync_status(bt_dev)) | |
192 | return; | |
193 | ||
194 | /* | |
195 | * Note the Toshiba Bluetooth RFKill switch seems to be a strange | |
196 | * fish. It only provides a BT event when the switch is flipped to | |
197 | * the 'on' position. When flipping it to 'off', the USB device is | |
198 | * simply pulled away underneath us, without any BT event being | |
199 | * delivered. | |
200 | */ | |
201 | rfkill_set_hw_state(bt_dev->rfk, !bt_dev->killswitch); | |
202 | } | |
203 | ||
204 | static const struct rfkill_ops rfk_ops = { | |
205 | .set_block = bt_rfkill_set_block, | |
206 | .poll = bt_rfkill_poll, | |
207 | }; | |
208 | ||
84c0691e | 209 | /* ACPI driver functions */ |
42b4e9ee JS |
210 | static void toshiba_bt_rfkill_notify(struct acpi_device *device, u32 event) |
211 | { | |
d85b11b1 AA |
212 | struct toshiba_bluetooth_dev *bt_dev = acpi_driver_data(device); |
213 | ||
214 | if (toshiba_bluetooth_sync_status(bt_dev)) | |
215 | return; | |
216 | ||
217 | rfkill_set_hw_state(bt_dev->rfk, !bt_dev->killswitch); | |
42b4e9ee JS |
218 | } |
219 | ||
3567a4e2 | 220 | #ifdef CONFIG_PM_SLEEP |
d69239ae | 221 | static int toshiba_bt_resume(struct device *dev) |
42b4e9ee | 222 | { |
d85b11b1 AA |
223 | struct toshiba_bluetooth_dev *bt_dev; |
224 | int ret; | |
225 | ||
226 | bt_dev = acpi_driver_data(to_acpi_device(dev)); | |
227 | ||
228 | ret = toshiba_bluetooth_sync_status(bt_dev); | |
229 | if (ret) | |
230 | return ret; | |
231 | ||
232 | rfkill_set_hw_state(bt_dev->rfk, !bt_dev->killswitch); | |
233 | ||
234 | return 0; | |
42b4e9ee | 235 | } |
3567a4e2 | 236 | #endif |
42b4e9ee JS |
237 | |
238 | static int toshiba_bt_rfkill_add(struct acpi_device *device) | |
239 | { | |
84c0691e | 240 | struct toshiba_bluetooth_dev *bt_dev; |
18b8696b | 241 | int result; |
42b4e9ee | 242 | |
18b8696b AA |
243 | result = toshiba_bluetooth_present(device->handle); |
244 | if (result) | |
245 | return result; | |
42b4e9ee | 246 | |
18b8696b AA |
247 | pr_info("Toshiba ACPI Bluetooth device driver\n"); |
248 | ||
84c0691e AA |
249 | bt_dev = kzalloc(sizeof(*bt_dev), GFP_KERNEL); |
250 | if (!bt_dev) | |
251 | return -ENOMEM; | |
252 | bt_dev->acpi_dev = device; | |
253 | device->driver_data = bt_dev; | |
254 | dev_set_drvdata(&device->dev, bt_dev); | |
255 | ||
256 | result = toshiba_bluetooth_sync_status(bt_dev); | |
257 | if (result) { | |
258 | kfree(bt_dev); | |
259 | return result; | |
260 | } | |
261 | ||
7ee8cd33 AA |
262 | bt_dev->rfk = rfkill_alloc("Toshiba Bluetooth", |
263 | &device->dev, | |
264 | RFKILL_TYPE_BLUETOOTH, | |
265 | &rfk_ops, | |
266 | bt_dev); | |
267 | if (!bt_dev->rfk) { | |
268 | pr_err("Unable to allocate rfkill device\n"); | |
269 | kfree(bt_dev); | |
270 | return -ENOMEM; | |
271 | } | |
272 | ||
273 | rfkill_set_hw_state(bt_dev->rfk, !bt_dev->killswitch); | |
274 | ||
275 | result = rfkill_register(bt_dev->rfk); | |
276 | if (result) { | |
277 | pr_err("Unable to register rfkill device\n"); | |
278 | rfkill_destroy(bt_dev->rfk); | |
84c0691e | 279 | kfree(bt_dev); |
7ee8cd33 | 280 | } |
42b4e9ee JS |
281 | |
282 | return result; | |
283 | } | |
284 | ||
51fac838 | 285 | static int toshiba_bt_rfkill_remove(struct acpi_device *device) |
42b4e9ee | 286 | { |
84c0691e AA |
287 | struct toshiba_bluetooth_dev *bt_dev = acpi_driver_data(device); |
288 | ||
42b4e9ee | 289 | /* clean up */ |
7ee8cd33 AA |
290 | if (bt_dev->rfk) { |
291 | rfkill_unregister(bt_dev->rfk); | |
292 | rfkill_destroy(bt_dev->rfk); | |
293 | } | |
294 | ||
84c0691e AA |
295 | kfree(bt_dev); |
296 | ||
18b8696b | 297 | return toshiba_bluetooth_disable(device->handle); |
42b4e9ee JS |
298 | } |
299 | ||
01d17753 | 300 | module_acpi_driver(toshiba_bt_rfkill_driver); |