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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Toshiba Bluetooth Enable Driver
4 *
5 * Copyright (C) 2009 Jes Sorensen <Jes.Sorensen@gmail.com>
6 * Copyright (C) 2015 Azael Avalos <coproscefalo@gmail.com>
7 *
8 * Thanks to Matthew Garrett for background info on ACPI innards which
9 * normal people aren't meant to understand :-)
10 */
11
12#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
13
14#include <linux/kernel.h>
15#include <linux/module.h>
16#include <linux/init.h>
17#include <linux/types.h>
18#include <linux/acpi.h>
19#include <linux/rfkill.h>
20
21#define BT_KILLSWITCH_MASK 0x01
22#define BT_PLUGGED_MASK 0x40
23#define BT_POWER_MASK 0x80
24
25MODULE_AUTHOR("Jes Sorensen <Jes.Sorensen@gmail.com>");
26MODULE_DESCRIPTION("Toshiba Laptop ACPI Bluetooth Enable Driver");
27MODULE_LICENSE("GPL");
28
29struct toshiba_bluetooth_dev {
30 struct acpi_device *acpi_dev;
31 struct rfkill *rfk;
32
33 bool killswitch;
34 bool plugged;
35 bool powered;
36};
37
38static int toshiba_bt_rfkill_add(struct acpi_device *device);
39static void toshiba_bt_rfkill_remove(struct acpi_device *device);
40static void toshiba_bt_rfkill_notify(struct acpi_device *device, u32 event);
41
42static const struct acpi_device_id bt_device_ids[] = {
43 { "TOS6205", 0},
44 { "", 0},
45};
46MODULE_DEVICE_TABLE(acpi, bt_device_ids);
47
48#ifdef CONFIG_PM_SLEEP
49static int toshiba_bt_resume(struct device *dev);
50#endif
51static SIMPLE_DEV_PM_OPS(toshiba_bt_pm, NULL, toshiba_bt_resume);
52
53static struct acpi_driver toshiba_bt_rfkill_driver = {
54 .name = "Toshiba BT",
55 .class = "Toshiba",
56 .ids = bt_device_ids,
57 .ops = {
58 .add = toshiba_bt_rfkill_add,
59 .remove = toshiba_bt_rfkill_remove,
60 .notify = toshiba_bt_rfkill_notify,
61 },
62 .owner = THIS_MODULE,
63 .drv.pm = &toshiba_bt_pm,
64};
65
66static int toshiba_bluetooth_present(acpi_handle handle)
67{
68 acpi_status result;
69 u64 bt_present;
70
71 /*
72 * Some Toshiba laptops may have a fake TOS6205 device in
73 * their ACPI BIOS, so query the _STA method to see if there
74 * is really anything there.
75 */
76 result = acpi_evaluate_integer(handle, "_STA", NULL, &bt_present);
77 if (ACPI_FAILURE(result)) {
78 pr_err("ACPI call to query Bluetooth presence failed\n");
79 return -ENXIO;
80 }
81
82 if (!bt_present) {
83 pr_info("Bluetooth device not present\n");
84 return -ENODEV;
85 }
86
87 return 0;
88}
89
90static int toshiba_bluetooth_status(acpi_handle handle)
91{
92 acpi_status result;
93 u64 status;
94
95 result = acpi_evaluate_integer(handle, "BTST", NULL, &status);
96 if (ACPI_FAILURE(result)) {
97 pr_err("Could not get Bluetooth device status\n");
98 return -ENXIO;
99 }
100
101 return status;
102}
103
104static int toshiba_bluetooth_enable(acpi_handle handle)
105{
106 acpi_status result;
107
108 result = acpi_evaluate_object(handle, "AUSB", NULL, NULL);
109 if (ACPI_FAILURE(result)) {
110 pr_err("Could not attach USB Bluetooth device\n");
111 return -ENXIO;
112 }
113
114 result = acpi_evaluate_object(handle, "BTPO", NULL, NULL);
115 if (ACPI_FAILURE(result)) {
116 pr_err("Could not power ON Bluetooth device\n");
117 return -ENXIO;
118 }
119
120 return 0;
121}
122
123static int toshiba_bluetooth_disable(acpi_handle handle)
124{
125 acpi_status result;
126
127 result = acpi_evaluate_object(handle, "BTPF", NULL, NULL);
128 if (ACPI_FAILURE(result)) {
129 pr_err("Could not power OFF Bluetooth device\n");
130 return -ENXIO;
131 }
132
133 result = acpi_evaluate_object(handle, "DUSB", NULL, NULL);
134 if (ACPI_FAILURE(result)) {
135 pr_err("Could not detach USB Bluetooth device\n");
136 return -ENXIO;
137 }
138
139 return 0;
140}
141
142/* Helper function */
143static int toshiba_bluetooth_sync_status(struct toshiba_bluetooth_dev *bt_dev)
144{
145 int status;
146
147 status = toshiba_bluetooth_status(bt_dev->acpi_dev->handle);
148 if (status < 0) {
149 pr_err("Could not sync bluetooth device status\n");
150 return status;
151 }
152
153 bt_dev->killswitch = (status & BT_KILLSWITCH_MASK) ? true : false;
154 bt_dev->plugged = (status & BT_PLUGGED_MASK) ? true : false;
155 bt_dev->powered = (status & BT_POWER_MASK) ? true : false;
156
157 pr_debug("Bluetooth status %d killswitch %d plugged %d powered %d\n",
158 status, bt_dev->killswitch, bt_dev->plugged, bt_dev->powered);
159
160 return 0;
161}
162
163/* RFKill handlers */
164static int bt_rfkill_set_block(void *data, bool blocked)
165{
166 struct toshiba_bluetooth_dev *bt_dev = data;
167 int ret;
168
169 ret = toshiba_bluetooth_sync_status(bt_dev);
170 if (ret)
171 return ret;
172
173 if (!bt_dev->killswitch)
174 return 0;
175
176 if (blocked)
177 ret = toshiba_bluetooth_disable(bt_dev->acpi_dev->handle);
178 else
179 ret = toshiba_bluetooth_enable(bt_dev->acpi_dev->handle);
180
181 return ret;
182}
183
184static void bt_rfkill_poll(struct rfkill *rfkill, void *data)
185{
186 struct toshiba_bluetooth_dev *bt_dev = data;
187
188 if (toshiba_bluetooth_sync_status(bt_dev))
189 return;
190
191 /*
192 * Note the Toshiba Bluetooth RFKill switch seems to be a strange
193 * fish. It only provides a BT event when the switch is flipped to
194 * the 'on' position. When flipping it to 'off', the USB device is
195 * simply pulled away underneath us, without any BT event being
196 * delivered.
197 */
198 rfkill_set_hw_state(bt_dev->rfk, !bt_dev->killswitch);
199}
200
201static const struct rfkill_ops rfk_ops = {
202 .set_block = bt_rfkill_set_block,
203 .poll = bt_rfkill_poll,
204};
205
206/* ACPI driver functions */
207static void toshiba_bt_rfkill_notify(struct acpi_device *device, u32 event)
208{
209 struct toshiba_bluetooth_dev *bt_dev = acpi_driver_data(device);
210
211 if (toshiba_bluetooth_sync_status(bt_dev))
212 return;
213
214 rfkill_set_hw_state(bt_dev->rfk, !bt_dev->killswitch);
215}
216
217#ifdef CONFIG_PM_SLEEP
218static int toshiba_bt_resume(struct device *dev)
219{
220 struct toshiba_bluetooth_dev *bt_dev;
221 int ret;
222
223 bt_dev = acpi_driver_data(to_acpi_device(dev));
224
225 ret = toshiba_bluetooth_sync_status(bt_dev);
226 if (ret)
227 return ret;
228
229 rfkill_set_hw_state(bt_dev->rfk, !bt_dev->killswitch);
230
231 return 0;
232}
233#endif
234
235static int toshiba_bt_rfkill_add(struct acpi_device *device)
236{
237 struct toshiba_bluetooth_dev *bt_dev;
238 int result;
239
240 result = toshiba_bluetooth_present(device->handle);
241 if (result)
242 return result;
243
244 pr_info("Toshiba ACPI Bluetooth device driver\n");
245
246 bt_dev = kzalloc(sizeof(*bt_dev), GFP_KERNEL);
247 if (!bt_dev)
248 return -ENOMEM;
249 bt_dev->acpi_dev = device;
250 device->driver_data = bt_dev;
251 dev_set_drvdata(&device->dev, bt_dev);
252
253 result = toshiba_bluetooth_sync_status(bt_dev);
254 if (result) {
255 kfree(bt_dev);
256 return result;
257 }
258
259 bt_dev->rfk = rfkill_alloc("Toshiba Bluetooth",
260 &device->dev,
261 RFKILL_TYPE_BLUETOOTH,
262 &rfk_ops,
263 bt_dev);
264 if (!bt_dev->rfk) {
265 pr_err("Unable to allocate rfkill device\n");
266 kfree(bt_dev);
267 return -ENOMEM;
268 }
269
270 rfkill_set_hw_state(bt_dev->rfk, !bt_dev->killswitch);
271
272 result = rfkill_register(bt_dev->rfk);
273 if (result) {
274 pr_err("Unable to register rfkill device\n");
275 rfkill_destroy(bt_dev->rfk);
276 kfree(bt_dev);
277 }
278
279 return result;
280}
281
282static void toshiba_bt_rfkill_remove(struct acpi_device *device)
283{
284 struct toshiba_bluetooth_dev *bt_dev = acpi_driver_data(device);
285
286 /* clean up */
287 if (bt_dev->rfk) {
288 rfkill_unregister(bt_dev->rfk);
289 rfkill_destroy(bt_dev->rfk);
290 }
291
292 kfree(bt_dev);
293
294 toshiba_bluetooth_disable(device->handle);
295}
296
297module_acpi_driver(toshiba_bt_rfkill_driver);
1/*
2 * Toshiba Bluetooth Enable Driver
3 *
4 * Copyright (C) 2009 Jes Sorensen <Jes.Sorensen@gmail.com>
5 * Copyright (C) 2015 Azael Avalos <coproscefalo@gmail.com>
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.
13 */
14
15#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
16
17#include <linux/kernel.h>
18#include <linux/module.h>
19#include <linux/init.h>
20#include <linux/types.h>
21#include <linux/acpi.h>
22#include <linux/rfkill.h>
23
24#define BT_KILLSWITCH_MASK 0x01
25#define BT_PLUGGED_MASK 0x40
26#define BT_POWER_MASK 0x80
27
28MODULE_AUTHOR("Jes Sorensen <Jes.Sorensen@gmail.com>");
29MODULE_DESCRIPTION("Toshiba Laptop ACPI Bluetooth Enable Driver");
30MODULE_LICENSE("GPL");
31
32struct toshiba_bluetooth_dev {
33 struct acpi_device *acpi_dev;
34 struct rfkill *rfk;
35
36 bool killswitch;
37 bool plugged;
38 bool powered;
39};
40
41static int toshiba_bt_rfkill_add(struct acpi_device *device);
42static int toshiba_bt_rfkill_remove(struct acpi_device *device);
43static void toshiba_bt_rfkill_notify(struct acpi_device *device, u32 event);
44
45static const struct acpi_device_id bt_device_ids[] = {
46 { "TOS6205", 0},
47 { "", 0},
48};
49MODULE_DEVICE_TABLE(acpi, bt_device_ids);
50
51#ifdef CONFIG_PM_SLEEP
52static int toshiba_bt_resume(struct device *dev);
53#endif
54static SIMPLE_DEV_PM_OPS(toshiba_bt_pm, NULL, toshiba_bt_resume);
55
56static 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,
64 },
65 .owner = THIS_MODULE,
66 .drv.pm = &toshiba_bt_pm,
67};
68
69static int toshiba_bluetooth_present(acpi_handle handle)
70{
71 acpi_status result;
72 u64 bt_present;
73
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 */
79 result = acpi_evaluate_integer(handle, "_STA", NULL, &bt_present);
80 if (ACPI_FAILURE(result)) {
81 pr_err("ACPI call to query Bluetooth presence failed\n");
82 return -ENXIO;
83 }
84
85 if (!bt_present) {
86 pr_info("Bluetooth device not present\n");
87 return -ENODEV;
88 }
89
90 return 0;
91}
92
93static 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
104 return status;
105}
106
107static int toshiba_bluetooth_enable(acpi_handle handle)
108{
109 acpi_status result;
110
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 }
116
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;
124}
125
126static 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
145/* Helper function */
146static 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
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
163 return 0;
164}
165
166/* RFKill handlers */
167static 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
187static 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
204static const struct rfkill_ops rfk_ops = {
205 .set_block = bt_rfkill_set_block,
206 .poll = bt_rfkill_poll,
207};
208
209/* ACPI driver functions */
210static void toshiba_bt_rfkill_notify(struct acpi_device *device, u32 event)
211{
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);
218}
219
220#ifdef CONFIG_PM_SLEEP
221static int toshiba_bt_resume(struct device *dev)
222{
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;
235}
236#endif
237
238static int toshiba_bt_rfkill_add(struct acpi_device *device)
239{
240 struct toshiba_bluetooth_dev *bt_dev;
241 int result;
242
243 result = toshiba_bluetooth_present(device->handle);
244 if (result)
245 return result;
246
247 pr_info("Toshiba ACPI Bluetooth device driver\n");
248
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
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);
279 kfree(bt_dev);
280 }
281
282 return result;
283}
284
285static int toshiba_bt_rfkill_remove(struct acpi_device *device)
286{
287 struct toshiba_bluetooth_dev *bt_dev = acpi_driver_data(device);
288
289 /* clean up */
290 if (bt_dev->rfk) {
291 rfkill_unregister(bt_dev->rfk);
292 rfkill_destroy(bt_dev->rfk);
293 }
294
295 kfree(bt_dev);
296
297 return toshiba_bluetooth_disable(device->handle);
298}
299
300module_acpi_driver(toshiba_bt_rfkill_driver);