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cfce41a6 EP |
1 | /* |
2 | * hp_accel.c - Interface between LIS3LV02DL driver and HP ACPI BIOS | |
3 | * | |
4 | * Copyright (C) 2007-2008 Yan Burman | |
5 | * Copyright (C) 2008 Eric Piel | |
9e1c9d86 | 6 | * Copyright (C) 2008-2009 Pavel Machek |
cfce41a6 EP |
7 | * |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
21 | */ | |
22 | ||
53ab0e68 JP |
23 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
24 | ||
cfce41a6 EP |
25 | #include <linux/kernel.h> |
26 | #include <linux/init.h> | |
27 | #include <linux/dmi.h> | |
28 | #include <linux/module.h> | |
29 | #include <linux/types.h> | |
30 | #include <linux/platform_device.h> | |
31 | #include <linux/interrupt.h> | |
cfce41a6 EP |
32 | #include <linux/delay.h> |
33 | #include <linux/wait.h> | |
34 | #include <linux/poll.h> | |
35 | #include <linux/freezer.h> | |
cfce41a6 | 36 | #include <linux/uaccess.h> |
9e0c7978 | 37 | #include <linux/leds.h> |
cfce41a6 EP |
38 | #include <acpi/acpi_drivers.h> |
39 | #include <asm/atomic.h> | |
40 | #include "lis3lv02d.h" | |
41 | ||
42 | #define DRIVER_NAME "lis3lv02d" | |
43 | #define ACPI_MDPS_CLASS "accelerometer" | |
44 | ||
9e1c9d86 PM |
45 | /* Delayed LEDs infrastructure ------------------------------------ */ |
46 | ||
47 | /* Special LED class that can defer work */ | |
48 | struct delayed_led_classdev { | |
49 | struct led_classdev led_classdev; | |
50 | struct work_struct work; | |
51 | enum led_brightness new_brightness; | |
52 | ||
53 | unsigned int led; /* For driver */ | |
54 | void (*set_brightness)(struct delayed_led_classdev *data, enum led_brightness value); | |
55 | }; | |
56 | ||
57 | static inline void delayed_set_status_worker(struct work_struct *work) | |
58 | { | |
59 | struct delayed_led_classdev *data = | |
60 | container_of(work, struct delayed_led_classdev, work); | |
61 | ||
62 | data->set_brightness(data, data->new_brightness); | |
63 | } | |
64 | ||
65 | static inline void delayed_sysfs_set(struct led_classdev *led_cdev, | |
66 | enum led_brightness brightness) | |
67 | { | |
68 | struct delayed_led_classdev *data = container_of(led_cdev, | |
69 | struct delayed_led_classdev, led_classdev); | |
70 | data->new_brightness = brightness; | |
71 | schedule_work(&data->work); | |
72 | } | |
73 | ||
74 | /* HP-specific accelerometer driver ------------------------------------ */ | |
cfce41a6 EP |
75 | |
76 | /* For automatic insertion of the module */ | |
77 | static struct acpi_device_id lis3lv02d_device_ids[] = { | |
78 | {"HPQ0004", 0}, /* HP Mobile Data Protection System PNP */ | |
79 | {"", 0}, | |
80 | }; | |
81 | MODULE_DEVICE_TABLE(acpi, lis3lv02d_device_ids); | |
82 | ||
83 | ||
84 | /** | |
85 | * lis3lv02d_acpi_init - ACPI _INI method: initialize the device. | |
a38da2ed | 86 | * @lis3: pointer to the device struct |
cfce41a6 | 87 | * |
a38da2ed | 88 | * Returns 0 on success. |
cfce41a6 | 89 | */ |
a38da2ed | 90 | int lis3lv02d_acpi_init(struct lis3lv02d *lis3) |
cfce41a6 | 91 | { |
a38da2ed DM |
92 | struct acpi_device *dev = lis3->bus_priv; |
93 | if (acpi_evaluate_object(dev->handle, METHOD_NAME__INI, | |
94 | NULL, NULL) != AE_OK) | |
95 | return -EINVAL; | |
96 | ||
97 | return 0; | |
cfce41a6 EP |
98 | } |
99 | ||
100 | /** | |
101 | * lis3lv02d_acpi_read - ACPI ALRD method: read a register | |
a38da2ed | 102 | * @lis3: pointer to the device struct |
cfce41a6 EP |
103 | * @reg: the register to read |
104 | * @ret: result of the operation | |
105 | * | |
a38da2ed | 106 | * Returns 0 on success. |
cfce41a6 | 107 | */ |
a38da2ed | 108 | int lis3lv02d_acpi_read(struct lis3lv02d *lis3, int reg, u8 *ret) |
cfce41a6 | 109 | { |
a38da2ed | 110 | struct acpi_device *dev = lis3->bus_priv; |
cfce41a6 EP |
111 | union acpi_object arg0 = { ACPI_TYPE_INTEGER }; |
112 | struct acpi_object_list args = { 1, &arg0 }; | |
113 | unsigned long long lret; | |
114 | acpi_status status; | |
115 | ||
116 | arg0.integer.value = reg; | |
117 | ||
a38da2ed | 118 | status = acpi_evaluate_integer(dev->handle, "ALRD", &args, &lret); |
cfce41a6 | 119 | *ret = lret; |
a38da2ed | 120 | return (status != AE_OK) ? -EINVAL : 0; |
cfce41a6 EP |
121 | } |
122 | ||
123 | /** | |
124 | * lis3lv02d_acpi_write - ACPI ALWR method: write to a register | |
a38da2ed | 125 | * @lis3: pointer to the device struct |
cfce41a6 EP |
126 | * @reg: the register to write to |
127 | * @val: the value to write | |
128 | * | |
a38da2ed | 129 | * Returns 0 on success. |
cfce41a6 | 130 | */ |
a38da2ed | 131 | int lis3lv02d_acpi_write(struct lis3lv02d *lis3, int reg, u8 val) |
cfce41a6 | 132 | { |
a38da2ed | 133 | struct acpi_device *dev = lis3->bus_priv; |
cfce41a6 EP |
134 | unsigned long long ret; /* Not used when writting */ |
135 | union acpi_object in_obj[2]; | |
136 | struct acpi_object_list args = { 2, in_obj }; | |
137 | ||
138 | in_obj[0].type = ACPI_TYPE_INTEGER; | |
139 | in_obj[0].integer.value = reg; | |
140 | in_obj[1].type = ACPI_TYPE_INTEGER; | |
141 | in_obj[1].integer.value = val; | |
142 | ||
a38da2ed DM |
143 | if (acpi_evaluate_integer(dev->handle, "ALWR", &args, &ret) != AE_OK) |
144 | return -EINVAL; | |
145 | ||
146 | return 0; | |
cfce41a6 EP |
147 | } |
148 | ||
149 | static int lis3lv02d_dmi_matched(const struct dmi_system_id *dmi) | |
150 | { | |
2ee32144 | 151 | lis3_dev.ac = *((union axis_conversion *)dmi->driver_data); |
53ab0e68 | 152 | pr_info("hardware type %s found\n", dmi->ident); |
cfce41a6 EP |
153 | |
154 | return 1; | |
155 | } | |
156 | ||
157 | /* Represents, for each axis seen by userspace, the corresponding hw axis (+1). | |
158 | * If the value is negative, the opposite of the hw value is used. */ | |
2ee32144 TI |
159 | #define DEFINE_CONV(name, x, y, z) \ |
160 | static union axis_conversion lis3lv02d_axis_##name = \ | |
161 | { .as_array = { x, y, z } } | |
162 | DEFINE_CONV(normal, 1, 2, 3); | |
163 | DEFINE_CONV(y_inverted, 1, -2, 3); | |
164 | DEFINE_CONV(x_inverted, -1, 2, 3); | |
165 | DEFINE_CONV(z_inverted, 1, 2, -3); | |
166 | DEFINE_CONV(xy_swap, 2, 1, 3); | |
167 | DEFINE_CONV(xy_rotated_left, -2, 1, 3); | |
168 | DEFINE_CONV(xy_rotated_left_usd, -2, 1, -3); | |
169 | DEFINE_CONV(xy_swap_inverted, -2, -1, 3); | |
170 | DEFINE_CONV(xy_rotated_right, 2, -1, 3); | |
171 | DEFINE_CONV(xy_swap_yz_inverted, 2, -1, -3); | |
cfce41a6 EP |
172 | |
173 | #define AXIS_DMI_MATCH(_ident, _name, _axis) { \ | |
174 | .ident = _ident, \ | |
175 | .callback = lis3lv02d_dmi_matched, \ | |
176 | .matches = { \ | |
177 | DMI_MATCH(DMI_PRODUCT_NAME, _name) \ | |
178 | }, \ | |
179 | .driver_data = &lis3lv02d_axis_##_axis \ | |
180 | } | |
9ccf3b5e GB |
181 | |
182 | #define AXIS_DMI_MATCH2(_ident, _class1, _name1, \ | |
183 | _class2, _name2, \ | |
184 | _axis) { \ | |
185 | .ident = _ident, \ | |
186 | .callback = lis3lv02d_dmi_matched, \ | |
187 | .matches = { \ | |
188 | DMI_MATCH(DMI_##_class1, _name1), \ | |
189 | DMI_MATCH(DMI_##_class2, _name2), \ | |
190 | }, \ | |
191 | .driver_data = &lis3lv02d_axis_##_axis \ | |
192 | } | |
cfce41a6 EP |
193 | static struct dmi_system_id lis3lv02d_dmi_ids[] = { |
194 | /* product names are truncated to match all kinds of a same model */ | |
195 | AXIS_DMI_MATCH("NC64x0", "HP Compaq nc64", x_inverted), | |
196 | AXIS_DMI_MATCH("NC84x0", "HP Compaq nc84", z_inverted), | |
197 | AXIS_DMI_MATCH("NX9420", "HP Compaq nx9420", x_inverted), | |
198 | AXIS_DMI_MATCH("NW9440", "HP Compaq nw9440", x_inverted), | |
199 | AXIS_DMI_MATCH("NC2510", "HP Compaq 2510", y_inverted), | |
0093716e | 200 | AXIS_DMI_MATCH("NC2710", "HP Compaq 2710", xy_swap), |
cfce41a6 EP |
201 | AXIS_DMI_MATCH("NC8510", "HP Compaq 8510", xy_swap_inverted), |
202 | AXIS_DMI_MATCH("HP2133", "HP 2133", xy_rotated_left), | |
9d7639d3 | 203 | AXIS_DMI_MATCH("HP2140", "HP 2140", xy_swap_inverted), |
80eda5fb | 204 | AXIS_DMI_MATCH("NC653x", "HP Compaq 653", xy_rotated_left_usd), |
a03018ff PH |
205 | AXIS_DMI_MATCH("NC6730b", "HP Compaq 6730b", xy_rotated_left_usd), |
206 | AXIS_DMI_MATCH("NC6730s", "HP Compaq 6730s", xy_swap), | |
6bfef2b3 | 207 | AXIS_DMI_MATCH("NC651xx", "HP Compaq 651", xy_rotated_right), |
0093716e EP |
208 | AXIS_DMI_MATCH("NC6710x", "HP Compaq 6710", xy_swap_yz_inverted), |
209 | AXIS_DMI_MATCH("NC6715x", "HP Compaq 6715", y_inverted), | |
210 | AXIS_DMI_MATCH("NC693xx", "HP EliteBook 693", xy_rotated_right), | |
af19611c | 211 | AXIS_DMI_MATCH("NC693xx", "HP EliteBook 853", xy_swap), |
9ccf3b5e GB |
212 | /* Intel-based HP Pavilion dv5 */ |
213 | AXIS_DMI_MATCH2("HPDV5_I", | |
214 | PRODUCT_NAME, "HP Pavilion dv5", | |
215 | BOARD_NAME, "3603", | |
216 | x_inverted), | |
217 | /* AMD-based HP Pavilion dv5 */ | |
218 | AXIS_DMI_MATCH2("HPDV5_A", | |
219 | PRODUCT_NAME, "HP Pavilion dv5", | |
220 | BOARD_NAME, "3600", | |
221 | y_inverted), | |
9d7639d3 | 222 | AXIS_DMI_MATCH("DV7", "HP Pavilion dv7", x_inverted), |
12a324b6 | 223 | AXIS_DMI_MATCH("HP8710", "HP Compaq 8710", y_inverted), |
2545f038 | 224 | AXIS_DMI_MATCH("HDX18", "HP HDX 18", x_inverted), |
9bd14a83 TI |
225 | AXIS_DMI_MATCH("HPB432x", "HP ProBook 432", xy_rotated_left), |
226 | AXIS_DMI_MATCH("HPB442x", "HP ProBook 442", xy_rotated_left), | |
227 | AXIS_DMI_MATCH("HPB452x", "HP ProBook 452", y_inverted), | |
228 | AXIS_DMI_MATCH("HPB522x", "HP ProBook 522", xy_swap), | |
4e70598c | 229 | AXIS_DMI_MATCH("HPB532x", "HP ProBook 532", y_inverted), |
37394050 | 230 | AXIS_DMI_MATCH("Mini510x", "HP Mini 510", xy_rotated_left_usd), |
cfce41a6 EP |
231 | { NULL, } |
232 | /* Laptop models without axis info (yet): | |
cfce41a6 | 233 | * "NC6910" "HP Compaq 6910" |
cfce41a6 EP |
234 | * "NC2400" "HP Compaq nc2400" |
235 | * "NX74x0" "HP Compaq nx74" | |
236 | * "NX6325" "HP Compaq nx6325" | |
237 | * "NC4400" "HP Compaq nc4400" | |
238 | */ | |
239 | }; | |
240 | ||
9e1c9d86 | 241 | static void hpled_set(struct delayed_led_classdev *led_cdev, enum led_brightness value) |
9e0c7978 | 242 | { |
a38da2ed | 243 | struct acpi_device *dev = lis3_dev.bus_priv; |
9e0c7978 EP |
244 | unsigned long long ret; /* Not used when writing */ |
245 | union acpi_object in_obj[1]; | |
246 | struct acpi_object_list args = { 1, in_obj }; | |
247 | ||
248 | in_obj[0].type = ACPI_TYPE_INTEGER; | |
9e1c9d86 | 249 | in_obj[0].integer.value = !!value; |
9e0c7978 | 250 | |
a38da2ed | 251 | acpi_evaluate_integer(dev->handle, "ALED", &args, &ret); |
9e0c7978 EP |
252 | } |
253 | ||
9e1c9d86 PM |
254 | static struct delayed_led_classdev hpled_led = { |
255 | .led_classdev = { | |
256 | .name = "hp::hddprotect", | |
257 | .default_trigger = "none", | |
258 | .brightness_set = delayed_sysfs_set, | |
259 | .flags = LED_CORE_SUSPENDRESUME, | |
260 | }, | |
261 | .set_brightness = hpled_set, | |
9e0c7978 | 262 | }; |
cfce41a6 | 263 | |
ef2cfc79 PM |
264 | static acpi_status |
265 | lis3lv02d_get_resource(struct acpi_resource *resource, void *context) | |
266 | { | |
267 | if (resource->type == ACPI_RESOURCE_TYPE_EXTENDED_IRQ) { | |
268 | struct acpi_resource_extended_irq *irq; | |
269 | u32 *device_irq = context; | |
270 | ||
271 | irq = &resource->data.extended_irq; | |
272 | *device_irq = irq->interrupts[0]; | |
273 | } | |
274 | ||
275 | return AE_OK; | |
276 | } | |
277 | ||
278 | static void lis3lv02d_enum_resources(struct acpi_device *device) | |
279 | { | |
280 | acpi_status status; | |
281 | ||
282 | status = acpi_walk_resources(device->handle, METHOD_NAME__CRS, | |
be84cfc5 | 283 | lis3lv02d_get_resource, &lis3_dev.irq); |
ef2cfc79 PM |
284 | if (ACPI_FAILURE(status)) |
285 | printk(KERN_DEBUG DRIVER_NAME ": Error getting resources\n"); | |
286 | } | |
287 | ||
cfce41a6 EP |
288 | static int lis3lv02d_add(struct acpi_device *device) |
289 | { | |
9e0c7978 | 290 | int ret; |
cfce41a6 EP |
291 | |
292 | if (!device) | |
293 | return -EINVAL; | |
294 | ||
a38da2ed | 295 | lis3_dev.bus_priv = device; |
be84cfc5 PM |
296 | lis3_dev.init = lis3lv02d_acpi_init; |
297 | lis3_dev.read = lis3lv02d_acpi_read; | |
298 | lis3_dev.write = lis3lv02d_acpi_write; | |
cfce41a6 EP |
299 | strcpy(acpi_device_name(device), DRIVER_NAME); |
300 | strcpy(acpi_device_class(device), ACPI_MDPS_CLASS); | |
be84cfc5 | 301 | device->driver_data = &lis3_dev; |
cfce41a6 | 302 | |
a38da2ed DM |
303 | /* obtain IRQ number of our device from ACPI */ |
304 | lis3lv02d_enum_resources(device); | |
cfce41a6 EP |
305 | |
306 | /* If possible use a "standard" axes order */ | |
2ee32144 | 307 | if (lis3_dev.ac.x && lis3_dev.ac.y && lis3_dev.ac.z) { |
53ab0e68 JP |
308 | pr_info("Using custom axes %d,%d,%d\n", |
309 | lis3_dev.ac.x, lis3_dev.ac.y, lis3_dev.ac.z); | |
2ee32144 | 310 | } else if (dmi_check_system(lis3lv02d_dmi_ids) == 0) { |
53ab0e68 | 311 | pr_info("laptop model unknown, using default axes configuration\n"); |
be84cfc5 | 312 | lis3_dev.ac = lis3lv02d_axis_normal; |
cfce41a6 EP |
313 | } |
314 | ||
a38da2ed DM |
315 | /* call the core layer do its init */ |
316 | ret = lis3lv02d_init_device(&lis3_dev); | |
9e0c7978 EP |
317 | if (ret) |
318 | return ret; | |
319 | ||
a38da2ed DM |
320 | INIT_WORK(&hpled_led.work, delayed_set_status_worker); |
321 | ret = led_classdev_register(NULL, &hpled_led.led_classdev); | |
9e0c7978 | 322 | if (ret) { |
a38da2ed DM |
323 | lis3lv02d_joystick_disable(); |
324 | lis3lv02d_poweroff(&lis3_dev); | |
9e1c9d86 | 325 | flush_work(&hpled_led.work); |
9e0c7978 EP |
326 | return ret; |
327 | } | |
328 | ||
329 | return ret; | |
cfce41a6 EP |
330 | } |
331 | ||
332 | static int lis3lv02d_remove(struct acpi_device *device, int type) | |
333 | { | |
334 | if (!device) | |
335 | return -EINVAL; | |
336 | ||
337 | lis3lv02d_joystick_disable(); | |
a38da2ed | 338 | lis3lv02d_poweroff(&lis3_dev); |
cfce41a6 | 339 | |
9e1c9d86 | 340 | led_classdev_unregister(&hpled_led.led_classdev); |
06efbeb4 | 341 | flush_work(&hpled_led.work); |
9e0c7978 | 342 | |
a002ee89 | 343 | return lis3lv02d_remove_fs(&lis3_dev); |
cfce41a6 EP |
344 | } |
345 | ||
346 | ||
347 | #ifdef CONFIG_PM | |
348 | static int lis3lv02d_suspend(struct acpi_device *device, pm_message_t state) | |
349 | { | |
350 | /* make sure the device is off when we suspend */ | |
a38da2ed | 351 | lis3lv02d_poweroff(&lis3_dev); |
cfce41a6 EP |
352 | return 0; |
353 | } | |
354 | ||
355 | static int lis3lv02d_resume(struct acpi_device *device) | |
356 | { | |
a002ee89 | 357 | lis3lv02d_poweron(&lis3_dev); |
cfce41a6 EP |
358 | return 0; |
359 | } | |
360 | #else | |
361 | #define lis3lv02d_suspend NULL | |
362 | #define lis3lv02d_resume NULL | |
363 | #endif | |
364 | ||
365 | /* For the HP MDPS aka 3D Driveguard */ | |
366 | static struct acpi_driver lis3lv02d_driver = { | |
367 | .name = DRIVER_NAME, | |
368 | .class = ACPI_MDPS_CLASS, | |
369 | .ids = lis3lv02d_device_ids, | |
370 | .ops = { | |
371 | .add = lis3lv02d_add, | |
372 | .remove = lis3lv02d_remove, | |
373 | .suspend = lis3lv02d_suspend, | |
374 | .resume = lis3lv02d_resume, | |
375 | } | |
376 | }; | |
377 | ||
378 | static int __init lis3lv02d_init_module(void) | |
379 | { | |
380 | int ret; | |
381 | ||
382 | if (acpi_disabled) | |
383 | return -ENODEV; | |
384 | ||
385 | ret = acpi_bus_register_driver(&lis3lv02d_driver); | |
386 | if (ret < 0) | |
387 | return ret; | |
388 | ||
53ab0e68 | 389 | pr_info("driver loaded\n"); |
cfce41a6 EP |
390 | |
391 | return 0; | |
392 | } | |
393 | ||
394 | static void __exit lis3lv02d_exit_module(void) | |
395 | { | |
396 | acpi_bus_unregister_driver(&lis3lv02d_driver); | |
397 | } | |
398 | ||
9e0c7978 | 399 | MODULE_DESCRIPTION("Glue between LIS3LV02Dx and HP ACPI BIOS and support for disk protection LED."); |
cfce41a6 EP |
400 | MODULE_AUTHOR("Yan Burman, Eric Piel, Pavel Machek"); |
401 | MODULE_LICENSE("GPL"); | |
402 | ||
403 | module_init(lis3lv02d_init_module); | |
404 | module_exit(lis3lv02d_exit_module); | |
405 |