xref: /linux/drivers/platform/x86/hp/hp_accel.c (revision 1ac731c529cd4d6adbce134754b51ff7d822b145)
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  *  hp_accel.c - Interface between LIS3LV02DL driver and HP ACPI BIOS
4  *
5  *  Copyright (C) 2007-2008 Yan Burman
6  *  Copyright (C) 2008 Eric Piel
7  *  Copyright (C) 2008-2009 Pavel Machek
8  */
9 
10 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
11 
12 #include <linux/kernel.h>
13 #include <linux/init.h>
14 #include <linux/dmi.h>
15 #include <linux/module.h>
16 #include <linux/types.h>
17 #include <linux/platform_device.h>
18 #include <linux/interrupt.h>
19 #include <linux/delay.h>
20 #include <linux/wait.h>
21 #include <linux/poll.h>
22 #include <linux/freezer.h>
23 #include <linux/uaccess.h>
24 #include <linux/leds.h>
25 #include <linux/atomic.h>
26 #include <linux/acpi.h>
27 #include <linux/i8042.h>
28 #include <linux/serio.h>
29 #include "../../../misc/lis3lv02d/lis3lv02d.h"
30 
31 /* Delayed LEDs infrastructure ------------------------------------ */
32 
33 /* Special LED class that can defer work */
34 struct delayed_led_classdev {
35 	struct led_classdev led_classdev;
36 	struct work_struct work;
37 	enum led_brightness new_brightness;
38 
39 	unsigned int led;		/* For driver */
40 	void (*set_brightness)(struct delayed_led_classdev *data, enum led_brightness value);
41 };
42 
delayed_set_status_worker(struct work_struct * work)43 static inline void delayed_set_status_worker(struct work_struct *work)
44 {
45 	struct delayed_led_classdev *data =
46 			container_of(work, struct delayed_led_classdev, work);
47 
48 	data->set_brightness(data, data->new_brightness);
49 }
50 
delayed_sysfs_set(struct led_classdev * led_cdev,enum led_brightness brightness)51 static inline void delayed_sysfs_set(struct led_classdev *led_cdev,
52 			      enum led_brightness brightness)
53 {
54 	struct delayed_led_classdev *data = container_of(led_cdev,
55 			     struct delayed_led_classdev, led_classdev);
56 	data->new_brightness = brightness;
57 	schedule_work(&data->work);
58 }
59 
60 /* HP-specific accelerometer driver ------------------------------------ */
61 
62 /* e0 25, e0 26, e0 27, e0 28 are scan codes that the accelerometer with acpi id
63  * HPQ6000 sends through the keyboard bus */
64 #define ACCEL_1 0x25
65 #define ACCEL_2 0x26
66 #define ACCEL_3 0x27
67 #define ACCEL_4 0x28
68 
69 /* For automatic insertion of the module */
70 static const struct acpi_device_id lis3lv02d_device_ids[] = {
71 	{"HPQ0004", 0}, /* HP Mobile Data Protection System PNP */
72 	{"HPQ6000", 0}, /* HP Mobile Data Protection System PNP */
73 	{"HPQ6007", 0}, /* HP Mobile Data Protection System PNP */
74 	{"", 0},
75 };
76 MODULE_DEVICE_TABLE(acpi, lis3lv02d_device_ids);
77 
78 /**
79  * lis3lv02d_acpi_init - initialize the device for ACPI
80  * @lis3: pointer to the device struct
81  *
82  * Returns 0 on success.
83  */
lis3lv02d_acpi_init(struct lis3lv02d * lis3)84 static int lis3lv02d_acpi_init(struct lis3lv02d *lis3)
85 {
86 	return 0;
87 }
88 
89 /**
90  * lis3lv02d_acpi_read - ACPI ALRD method: read a register
91  * @lis3: pointer to the device struct
92  * @reg:    the register to read
93  * @ret:    result of the operation
94  *
95  * Returns 0 on success.
96  */
lis3lv02d_acpi_read(struct lis3lv02d * lis3,int reg,u8 * ret)97 static int lis3lv02d_acpi_read(struct lis3lv02d *lis3, int reg, u8 *ret)
98 {
99 	struct acpi_device *dev = lis3->bus_priv;
100 	union acpi_object arg0 = { ACPI_TYPE_INTEGER };
101 	struct acpi_object_list args = { 1, &arg0 };
102 	unsigned long long lret;
103 	acpi_status status;
104 
105 	arg0.integer.value = reg;
106 
107 	status = acpi_evaluate_integer(dev->handle, "ALRD", &args, &lret);
108 	if (ACPI_FAILURE(status))
109 		return -EINVAL;
110 	*ret = lret;
111 	return 0;
112 }
113 
114 /**
115  * lis3lv02d_acpi_write - ACPI ALWR method: write to a register
116  * @lis3: pointer to the device struct
117  * @reg:    the register to write to
118  * @val:    the value to write
119  *
120  * Returns 0 on success.
121  */
lis3lv02d_acpi_write(struct lis3lv02d * lis3,int reg,u8 val)122 static int lis3lv02d_acpi_write(struct lis3lv02d *lis3, int reg, u8 val)
123 {
124 	struct acpi_device *dev = lis3->bus_priv;
125 	unsigned long long ret; /* Not used when writting */
126 	union acpi_object in_obj[2];
127 	struct acpi_object_list args = { 2, in_obj };
128 
129 	in_obj[0].type          = ACPI_TYPE_INTEGER;
130 	in_obj[0].integer.value = reg;
131 	in_obj[1].type          = ACPI_TYPE_INTEGER;
132 	in_obj[1].integer.value = val;
133 
134 	if (acpi_evaluate_integer(dev->handle, "ALWR", &args, &ret) != AE_OK)
135 		return -EINVAL;
136 
137 	return 0;
138 }
139 
lis3lv02d_dmi_matched(const struct dmi_system_id * dmi)140 static int lis3lv02d_dmi_matched(const struct dmi_system_id *dmi)
141 {
142 	lis3_dev.ac = *((union axis_conversion *)dmi->driver_data);
143 	pr_info("hardware type %s found\n", dmi->ident);
144 
145 	return 1;
146 }
147 
148 /* Represents, for each axis seen by userspace, the corresponding hw axis (+1).
149  * If the value is negative, the opposite of the hw value is used. */
150 #define DEFINE_CONV(name, x, y, z)			      \
151 	static union axis_conversion lis3lv02d_axis_##name = \
152 		{ .as_array = { x, y, z } }
153 DEFINE_CONV(normal, 1, 2, 3);
154 DEFINE_CONV(y_inverted, 1, -2, 3);
155 DEFINE_CONV(x_inverted, -1, 2, 3);
156 DEFINE_CONV(x_inverted_usd, -1, 2, -3);
157 DEFINE_CONV(z_inverted, 1, 2, -3);
158 DEFINE_CONV(xy_swap, 2, 1, 3);
159 DEFINE_CONV(xy_rotated_left, -2, 1, 3);
160 DEFINE_CONV(xy_rotated_left_usd, -2, 1, -3);
161 DEFINE_CONV(xy_swap_inverted, -2, -1, 3);
162 DEFINE_CONV(xy_rotated_right, 2, -1, 3);
163 DEFINE_CONV(xy_swap_yz_inverted, 2, -1, -3);
164 
165 #define AXIS_DMI_MATCH(_ident, _name, _axis) {		\
166 	.ident = _ident,				\
167 	.callback = lis3lv02d_dmi_matched,		\
168 	.matches = {					\
169 		DMI_MATCH(DMI_PRODUCT_NAME, _name)	\
170 	},						\
171 	.driver_data = &lis3lv02d_axis_##_axis		\
172 }
173 
174 #define AXIS_DMI_MATCH2(_ident, _class1, _name1,	\
175 				_class2, _name2,	\
176 				_axis) {		\
177 	.ident = _ident,				\
178 	.callback = lis3lv02d_dmi_matched,		\
179 	.matches = {					\
180 		DMI_MATCH(DMI_##_class1, _name1),	\
181 		DMI_MATCH(DMI_##_class2, _name2),	\
182 	},						\
183 	.driver_data = &lis3lv02d_axis_##_axis		\
184 }
185 static const struct dmi_system_id lis3lv02d_dmi_ids[] = {
186 	/* product names are truncated to match all kinds of a same model */
187 	AXIS_DMI_MATCH("NC64x0", "HP Compaq nc64", x_inverted),
188 	AXIS_DMI_MATCH("NC84x0", "HP Compaq nc84", z_inverted),
189 	AXIS_DMI_MATCH("NX9420", "HP Compaq nx9420", x_inverted),
190 	AXIS_DMI_MATCH("NW9440", "HP Compaq nw9440", x_inverted),
191 	AXIS_DMI_MATCH("NC2510", "HP Compaq 2510", y_inverted),
192 	AXIS_DMI_MATCH("NC2710", "HP Compaq 2710", xy_swap),
193 	AXIS_DMI_MATCH("NC8510", "HP Compaq 8510", xy_swap_inverted),
194 	AXIS_DMI_MATCH("HP2133", "HP 2133", xy_rotated_left),
195 	AXIS_DMI_MATCH("HP2140", "HP 2140", xy_swap_inverted),
196 	AXIS_DMI_MATCH("NC653x", "HP Compaq 653", xy_rotated_left_usd),
197 	AXIS_DMI_MATCH("NC6730b", "HP Compaq 6730b", xy_rotated_left_usd),
198 	AXIS_DMI_MATCH("NC6730s", "HP Compaq 6730s", xy_swap),
199 	AXIS_DMI_MATCH("NC651xx", "HP Compaq 651", xy_rotated_right),
200 	AXIS_DMI_MATCH("NC6710x", "HP Compaq 6710", xy_swap_yz_inverted),
201 	AXIS_DMI_MATCH("NC6715x", "HP Compaq 6715", y_inverted),
202 	AXIS_DMI_MATCH("NC693xx", "HP EliteBook 693", xy_rotated_right),
203 	AXIS_DMI_MATCH("NC693xx", "HP EliteBook 853", xy_swap),
204 	AXIS_DMI_MATCH("NC854xx", "HP EliteBook 854", y_inverted),
205 	AXIS_DMI_MATCH("NC273xx", "HP EliteBook 273", y_inverted),
206 	/* Intel-based HP Pavilion dv5 */
207 	AXIS_DMI_MATCH2("HPDV5_I",
208 			PRODUCT_NAME, "HP Pavilion dv5",
209 			BOARD_NAME, "3603",
210 			x_inverted),
211 	/* AMD-based HP Pavilion dv5 */
212 	AXIS_DMI_MATCH2("HPDV5_A",
213 			PRODUCT_NAME, "HP Pavilion dv5",
214 			BOARD_NAME, "3600",
215 			y_inverted),
216 	AXIS_DMI_MATCH("DV7", "HP Pavilion dv7", x_inverted),
217 	AXIS_DMI_MATCH("HP8710", "HP Compaq 8710", y_inverted),
218 	AXIS_DMI_MATCH("HDX18", "HP HDX 18", x_inverted),
219 	AXIS_DMI_MATCH("HPB432x", "HP ProBook 432", xy_rotated_left),
220 	AXIS_DMI_MATCH("HPB440G3", "HP ProBook 440 G3", x_inverted_usd),
221 	AXIS_DMI_MATCH("HPB440G4", "HP ProBook 440 G4", x_inverted),
222 	AXIS_DMI_MATCH("HPB442x", "HP ProBook 442", xy_rotated_left),
223 	AXIS_DMI_MATCH("HPB450G0", "HP ProBook 450 G0", x_inverted),
224 	AXIS_DMI_MATCH("HPB452x", "HP ProBook 452", y_inverted),
225 	AXIS_DMI_MATCH("HPB522x", "HP ProBook 522", xy_swap),
226 	AXIS_DMI_MATCH("HPB532x", "HP ProBook 532", y_inverted),
227 	AXIS_DMI_MATCH("HPB655x", "HP ProBook 655", xy_swap_inverted),
228 	AXIS_DMI_MATCH("Mini510x", "HP Mini 510", xy_rotated_left_usd),
229 	AXIS_DMI_MATCH("HPB63xx", "HP ProBook 63", xy_swap),
230 	AXIS_DMI_MATCH("HPB64xx", "HP ProBook 64", xy_swap),
231 	AXIS_DMI_MATCH("HPB64xx", "HP EliteBook 84", xy_swap),
232 	AXIS_DMI_MATCH("HPB65xx", "HP ProBook 65", x_inverted),
233 	AXIS_DMI_MATCH("HPZBook15", "HP ZBook 15", x_inverted),
234 	AXIS_DMI_MATCH("HPZBook17G5", "HP ZBook 17 G5", x_inverted),
235 	AXIS_DMI_MATCH("HPZBook17", "HP ZBook 17", xy_swap_yz_inverted),
236 	{ NULL, }
237 /* Laptop models without axis info (yet):
238  * "NC6910" "HP Compaq 6910"
239  * "NC2400" "HP Compaq nc2400"
240  * "NX74x0" "HP Compaq nx74"
241  * "NX6325" "HP Compaq nx6325"
242  * "NC4400" "HP Compaq nc4400"
243  */
244 };
245 
hpled_set(struct delayed_led_classdev * led_cdev,enum led_brightness value)246 static void hpled_set(struct delayed_led_classdev *led_cdev, enum led_brightness value)
247 {
248 	struct acpi_device *dev = lis3_dev.bus_priv;
249 	unsigned long long ret; /* Not used when writing */
250 	union acpi_object in_obj[1];
251 	struct acpi_object_list args = { 1, in_obj };
252 
253 	in_obj[0].type          = ACPI_TYPE_INTEGER;
254 	in_obj[0].integer.value = !!value;
255 
256 	acpi_evaluate_integer(dev->handle, "ALED", &args, &ret);
257 }
258 
259 static struct delayed_led_classdev hpled_led = {
260 	.led_classdev = {
261 		.name			= "hp::hddprotect",
262 		.default_trigger	= "none",
263 		.brightness_set		= delayed_sysfs_set,
264 		.flags                  = LED_CORE_SUSPENDRESUME,
265 	},
266 	.set_brightness = hpled_set,
267 };
268 
hp_accel_i8042_filter(unsigned char data,unsigned char str,struct serio * port)269 static bool hp_accel_i8042_filter(unsigned char data, unsigned char str,
270 				  struct serio *port)
271 {
272 	static bool extended;
273 
274 	if (str & I8042_STR_AUXDATA)
275 		return false;
276 
277 	if (data == 0xe0) {
278 		extended = true;
279 		return true;
280 	} else if (unlikely(extended)) {
281 		extended = false;
282 
283 		switch (data) {
284 		case ACCEL_1:
285 		case ACCEL_2:
286 		case ACCEL_3:
287 		case ACCEL_4:
288 			return true;
289 		default:
290 			serio_interrupt(port, 0xe0, 0);
291 			return false;
292 		}
293 	}
294 
295 	return false;
296 }
297 
lis3lv02d_probe(struct platform_device * device)298 static int lis3lv02d_probe(struct platform_device *device)
299 {
300 	int ret;
301 
302 	lis3_dev.bus_priv = ACPI_COMPANION(&device->dev);
303 	lis3_dev.init = lis3lv02d_acpi_init;
304 	lis3_dev.read = lis3lv02d_acpi_read;
305 	lis3_dev.write = lis3lv02d_acpi_write;
306 
307 	/* obtain IRQ number of our device from ACPI */
308 	ret = platform_get_irq_optional(device, 0);
309 	if (ret > 0)
310 		lis3_dev.irq = ret;
311 
312 	/* If possible use a "standard" axes order */
313 	if (lis3_dev.ac.x && lis3_dev.ac.y && lis3_dev.ac.z) {
314 		pr_info("Using custom axes %d,%d,%d\n",
315 			lis3_dev.ac.x, lis3_dev.ac.y, lis3_dev.ac.z);
316 	} else if (dmi_check_system(lis3lv02d_dmi_ids) == 0) {
317 		pr_info("laptop model unknown, using default axes configuration\n");
318 		lis3_dev.ac = lis3lv02d_axis_normal;
319 	}
320 
321 	/* call the core layer do its init */
322 	ret = lis3lv02d_init_device(&lis3_dev);
323 	if (ret)
324 		return ret;
325 
326 	/* filter to remove HPQ6000 accelerometer data
327 	 * from keyboard bus stream */
328 	if (strstr(dev_name(&device->dev), "HPQ6000"))
329 		i8042_install_filter(hp_accel_i8042_filter);
330 
331 	INIT_WORK(&hpled_led.work, delayed_set_status_worker);
332 	ret = led_classdev_register(NULL, &hpled_led.led_classdev);
333 	if (ret) {
334 		i8042_remove_filter(hp_accel_i8042_filter);
335 		lis3lv02d_joystick_disable(&lis3_dev);
336 		lis3lv02d_poweroff(&lis3_dev);
337 		flush_work(&hpled_led.work);
338 		lis3lv02d_remove_fs(&lis3_dev);
339 		return ret;
340 	}
341 
342 	return ret;
343 }
344 
lis3lv02d_remove(struct platform_device * device)345 static void lis3lv02d_remove(struct platform_device *device)
346 {
347 	i8042_remove_filter(hp_accel_i8042_filter);
348 	lis3lv02d_joystick_disable(&lis3_dev);
349 	lis3lv02d_poweroff(&lis3_dev);
350 
351 	led_classdev_unregister(&hpled_led.led_classdev);
352 	flush_work(&hpled_led.work);
353 
354 	lis3lv02d_remove_fs(&lis3_dev);
355 }
356 
lis3lv02d_suspend(struct device * dev)357 static int __maybe_unused lis3lv02d_suspend(struct device *dev)
358 {
359 	/* make sure the device is off when we suspend */
360 	lis3lv02d_poweroff(&lis3_dev);
361 	return 0;
362 }
363 
lis3lv02d_resume(struct device * dev)364 static int __maybe_unused lis3lv02d_resume(struct device *dev)
365 {
366 	lis3lv02d_poweron(&lis3_dev);
367 	return 0;
368 }
369 
370 static SIMPLE_DEV_PM_OPS(hp_accel_pm, lis3lv02d_suspend, lis3lv02d_resume);
371 
372 /* For the HP MDPS aka 3D Driveguard */
373 static struct platform_driver lis3lv02d_driver = {
374 	.probe	= lis3lv02d_probe,
375 	.remove_new = lis3lv02d_remove,
376 	.driver	= {
377 		.name	= "hp_accel",
378 		.pm	= &hp_accel_pm,
379 		.acpi_match_table = lis3lv02d_device_ids,
380 	},
381 };
382 module_platform_driver(lis3lv02d_driver);
383 
384 MODULE_DESCRIPTION("Glue between LIS3LV02Dx and HP ACPI BIOS and support for disk protection LED.");
385 MODULE_AUTHOR("Yan Burman, Eric Piel, Pavel Machek");
386 MODULE_LICENSE("GPL");
387