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	} else if (!bt_present) {
 
 
 84		pr_info("Bluetooth device not present\n");
 85		return -ENODEV;
 86	}
 87
 88	return 0;
 89}
 90
 91static 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
102	return status;
103}
104
105static int toshiba_bluetooth_enable(acpi_handle handle)
106{
107	acpi_status result;
108
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	}
114
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;
122}
123
124static 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
143/* Helper function */
144static 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
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
161	return 0;
162}
163
164/* RFKill handlers */
165static 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
185static 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
202static const struct rfkill_ops rfk_ops = {
203	.set_block = bt_rfkill_set_block,
204	.poll = bt_rfkill_poll,
205};
206
207/* ACPI driver functions */
208static void toshiba_bt_rfkill_notify(struct acpi_device *device, u32 event)
209{
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);
216}
217
218#ifdef CONFIG_PM_SLEEP
219static int toshiba_bt_resume(struct device *dev)
220{
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;
233}
234#endif
235
236static int toshiba_bt_rfkill_add(struct acpi_device *device)
237{
238	struct toshiba_bluetooth_dev *bt_dev;
239	int result;
240
241	result = toshiba_bluetooth_present(device->handle);
242	if (result)
243		return result;
244
245	pr_info("Toshiba ACPI Bluetooth device driver\n");
246
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
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);
277		kfree(bt_dev);
278	}
279
280	return result;
281}
282
283static int toshiba_bt_rfkill_remove(struct acpi_device *device)
284{
285	struct toshiba_bluetooth_dev *bt_dev = acpi_driver_data(device);
286
287	/* clean up */
288	if (bt_dev->rfk) {
289		rfkill_unregister(bt_dev->rfk);
290		rfkill_destroy(bt_dev->rfk);
291	}
292
293	kfree(bt_dev);
294
295	return toshiba_bluetooth_disable(device->handle);
296}
297
298module_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);