blob: 57a5dc60c58a62abc27494dffe6af221a52ca4fb [file] [log] [blame]
Thomas Gleixnerd2912cb2019-06-04 10:11:33 +02001// SPDX-License-Identifier: GPL-2.0-only
Jes Sorensen42b4e9e2009-12-16 12:08:15 -05002/*
3 * Toshiba Bluetooth Enable Driver
4 *
5 * Copyright (C) 2009 Jes Sorensen <Jes.Sorensen@gmail.com>
Azael Avalos5d3fc1d2015-03-26 14:56:07 -06006 * Copyright (C) 2015 Azael Avalos <coproscefalo@gmail.com>
Jes Sorensen42b4e9e2009-12-16 12:08:15 -05007 *
8 * Thanks to Matthew Garrett for background info on ACPI innards which
9 * normal people aren't meant to understand :-)
Jes Sorensen42b4e9e2009-12-16 12:08:15 -050010 */
11
Joe Perches7e334602011-03-29 15:21:52 -070012#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
13
Jes Sorensen42b4e9e2009-12-16 12:08:15 -050014#include <linux/kernel.h>
15#include <linux/module.h>
16#include <linux/init.h>
17#include <linux/types.h>
Lv Zheng8b484632013-12-03 08:49:16 +080018#include <linux/acpi.h>
Azael Avalos7ee8cd32015-05-03 17:42:07 -060019#include <linux/rfkill.h>
Jes Sorensen42b4e9e2009-12-16 12:08:15 -050020
Azael Avalos5d3fc1d2015-03-26 14:56:07 -060021#define BT_KILLSWITCH_MASK 0x01
22#define BT_PLUGGED_MASK 0x40
23#define BT_POWER_MASK 0x80
24
Jes Sorensen42b4e9e2009-12-16 12:08:15 -050025MODULE_AUTHOR("Jes Sorensen <Jes.Sorensen@gmail.com>");
26MODULE_DESCRIPTION("Toshiba Laptop ACPI Bluetooth Enable Driver");
27MODULE_LICENSE("GPL");
28
Azael Avalos84c06912015-05-03 17:42:06 -060029struct toshiba_bluetooth_dev {
30 struct acpi_device *acpi_dev;
Azael Avalos7ee8cd32015-05-03 17:42:07 -060031 struct rfkill *rfk;
Azael Avalos84c06912015-05-03 17:42:06 -060032
33 bool killswitch;
34 bool plugged;
35 bool powered;
36};
37
Jes Sorensen42b4e9e2009-12-16 12:08:15 -050038static int toshiba_bt_rfkill_add(struct acpi_device *device);
Rafael J. Wysocki51fac832013-01-24 00:24:48 +010039static int toshiba_bt_rfkill_remove(struct acpi_device *device);
Jes Sorensen42b4e9e2009-12-16 12:08:15 -050040static void toshiba_bt_rfkill_notify(struct acpi_device *device, u32 event);
Jes Sorensen42b4e9e2009-12-16 12:08:15 -050041
42static const struct acpi_device_id bt_device_ids[] = {
43 { "TOS6205", 0},
44 { "", 0},
45};
46MODULE_DEVICE_TABLE(acpi, bt_device_ids);
47
Rafael J. Wysocki3567a4e22012-08-09 23:00:13 +020048#ifdef CONFIG_PM_SLEEP
Rafael J. Wysockid69239a2012-06-27 23:27:48 +020049static int toshiba_bt_resume(struct device *dev);
Rafael J. Wysocki3567a4e22012-08-09 23:00:13 +020050#endif
Rafael J. Wysockid69239a2012-06-27 23:27:48 +020051static SIMPLE_DEV_PM_OPS(toshiba_bt_pm, NULL, toshiba_bt_resume);
52
Jes Sorensen42b4e9e2009-12-16 12:08:15 -050053static 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,
Jes Sorensen42b4e9e2009-12-16 12:08:15 -050061 },
62 .owner = THIS_MODULE,
Rafael J. Wysockid69239a2012-06-27 23:27:48 +020063 .drv.pm = &toshiba_bt_pm,
Jes Sorensen42b4e9e2009-12-16 12:08:15 -050064};
65
Azael Avalosbb2ea962015-03-26 14:56:05 -060066static int toshiba_bluetooth_present(acpi_handle handle)
67{
68 acpi_status result;
69 u64 bt_present;
70
Azael Avalos18b86962015-03-26 14:56:06 -060071 /*
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 */
Azael Avalosbb2ea962015-03-26 14:56:05 -060076 result = acpi_evaluate_integer(handle, "_STA", NULL, &bt_present);
77 if (ACPI_FAILURE(result)) {
Azael Avalos260e0ec2015-11-15 20:33:47 -070078 pr_err("ACPI call to query Bluetooth presence failed\n");
Azael Avalosbb2ea962015-03-26 14:56:05 -060079 return -ENXIO;
Azael Avalos28e476d2016-09-07 09:28:15 -060080 }
81
82 if (!bt_present) {
Azael Avalosbb2ea962015-03-26 14:56:05 -060083 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
Azael Avalosbb2ea962015-03-26 14:56:05 -0600101 return status;
102}
Jes Sorensen42b4e9e2009-12-16 12:08:15 -0500103
104static int toshiba_bluetooth_enable(acpi_handle handle)
105{
Azael Avalos5d3fc1d2015-03-26 14:56:07 -0600106 acpi_status result;
Jes Sorensen42b4e9e2009-12-16 12:08:15 -0500107
Azael Avalos5d3fc1d2015-03-26 14:56:07 -0600108 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 }
Jes Sorensen42b4e9e2009-12-16 12:08:15 -0500113
Azael Avalos5d3fc1d2015-03-26 14:56:07 -0600114 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 }
Jes Sorensen42b4e9e2009-12-16 12:08:15 -0500119
Azael Avalos5d3fc1d2015-03-26 14:56:07 -0600120 return 0;
Jes Sorensen42b4e9e2009-12-16 12:08:15 -0500121}
122
Azael Avalosbb2ea962015-03-26 14:56:05 -0600123static 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
Azael Avalos84c06912015-05-03 17:42:06 -0600142/* 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
Azael Avalos8798df82015-05-03 17:42:09 -0600157 pr_debug("Bluetooth status %d killswitch %d plugged %d powered %d\n",
158 status, bt_dev->killswitch, bt_dev->plugged, bt_dev->powered);
159
Azael Avalos84c06912015-05-03 17:42:06 -0600160 return 0;
161}
162
Azael Avalos7ee8cd32015-05-03 17:42:07 -0600163/* 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
Azael Avalos84c06912015-05-03 17:42:06 -0600206/* ACPI driver functions */
Jes Sorensen42b4e9e2009-12-16 12:08:15 -0500207static void toshiba_bt_rfkill_notify(struct acpi_device *device, u32 event)
208{
Azael Avalosd85b11b2015-05-03 17:42:08 -0600209 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);
Jes Sorensen42b4e9e2009-12-16 12:08:15 -0500215}
216
Rafael J. Wysocki3567a4e22012-08-09 23:00:13 +0200217#ifdef CONFIG_PM_SLEEP
Rafael J. Wysockid69239a2012-06-27 23:27:48 +0200218static int toshiba_bt_resume(struct device *dev)
Jes Sorensen42b4e9e2009-12-16 12:08:15 -0500219{
Azael Avalosd85b11b2015-05-03 17:42:08 -0600220 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;
Jes Sorensen42b4e9e2009-12-16 12:08:15 -0500232}
Rafael J. Wysocki3567a4e22012-08-09 23:00:13 +0200233#endif
Jes Sorensen42b4e9e2009-12-16 12:08:15 -0500234
235static int toshiba_bt_rfkill_add(struct acpi_device *device)
236{
Azael Avalos84c06912015-05-03 17:42:06 -0600237 struct toshiba_bluetooth_dev *bt_dev;
Azael Avalos18b86962015-03-26 14:56:06 -0600238 int result;
Jes Sorensen42b4e9e2009-12-16 12:08:15 -0500239
Azael Avalos18b86962015-03-26 14:56:06 -0600240 result = toshiba_bluetooth_present(device->handle);
241 if (result)
242 return result;
Jes Sorensen42b4e9e2009-12-16 12:08:15 -0500243
Azael Avalos18b86962015-03-26 14:56:06 -0600244 pr_info("Toshiba ACPI Bluetooth device driver\n");
245
Azael Avalos84c06912015-05-03 17:42:06 -0600246 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
Azael Avalos7ee8cd32015-05-03 17:42:07 -0600259 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");
Azael Avalos84c06912015-05-03 17:42:06 -0600266 kfree(bt_dev);
Azael Avalos7ee8cd32015-05-03 17:42:07 -0600267 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 }
Jes Sorensen42b4e9e2009-12-16 12:08:15 -0500278
279 return result;
280}
281
Rafael J. Wysocki51fac832013-01-24 00:24:48 +0100282static int toshiba_bt_rfkill_remove(struct acpi_device *device)
Jes Sorensen42b4e9e2009-12-16 12:08:15 -0500283{
Azael Avalos84c06912015-05-03 17:42:06 -0600284 struct toshiba_bluetooth_dev *bt_dev = acpi_driver_data(device);
285
Jes Sorensen42b4e9e2009-12-16 12:08:15 -0500286 /* clean up */
Azael Avalos7ee8cd32015-05-03 17:42:07 -0600287 if (bt_dev->rfk) {
288 rfkill_unregister(bt_dev->rfk);
289 rfkill_destroy(bt_dev->rfk);
290 }
291
Azael Avalos84c06912015-05-03 17:42:06 -0600292 kfree(bt_dev);
293
Azael Avalos18b86962015-03-26 14:56:06 -0600294 return toshiba_bluetooth_disable(device->handle);
Jes Sorensen42b4e9e2009-12-16 12:08:15 -0500295}
296
Mika Westerberg01d17752012-09-07 10:31:48 +0300297module_acpi_driver(toshiba_bt_rfkill_driver);