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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 | ||
23 | #include <linux/kernel.h> | |
24 | #include <linux/init.h> | |
25 | #include <linux/dmi.h> | |
26 | #include <linux/module.h> | |
27 | #include <linux/types.h> | |
28 | #include <linux/platform_device.h> | |
29 | #include <linux/interrupt.h> | |
30 | #include <linux/input.h> | |
31 | #include <linux/kthread.h> | |
32 | #include <linux/semaphore.h> | |
33 | #include <linux/delay.h> | |
34 | #include <linux/wait.h> | |
35 | #include <linux/poll.h> | |
36 | #include <linux/freezer.h> | |
37 | #include <linux/version.h> | |
38 | #include <linux/uaccess.h> | |
9e0c7978 | 39 | #include <linux/leds.h> |
cfce41a6 EP |
40 | #include <acpi/acpi_drivers.h> |
41 | #include <asm/atomic.h> | |
42 | #include "lis3lv02d.h" | |
43 | ||
44 | #define DRIVER_NAME "lis3lv02d" | |
45 | #define ACPI_MDPS_CLASS "accelerometer" | |
46 | ||
9e1c9d86 PM |
47 | /* Delayed LEDs infrastructure ------------------------------------ */ |
48 | ||
49 | /* Special LED class that can defer work */ | |
50 | struct delayed_led_classdev { | |
51 | struct led_classdev led_classdev; | |
52 | struct work_struct work; | |
53 | enum led_brightness new_brightness; | |
54 | ||
55 | unsigned int led; /* For driver */ | |
56 | void (*set_brightness)(struct delayed_led_classdev *data, enum led_brightness value); | |
57 | }; | |
58 | ||
59 | static inline void delayed_set_status_worker(struct work_struct *work) | |
60 | { | |
61 | struct delayed_led_classdev *data = | |
62 | container_of(work, struct delayed_led_classdev, work); | |
63 | ||
64 | data->set_brightness(data, data->new_brightness); | |
65 | } | |
66 | ||
67 | static inline void delayed_sysfs_set(struct led_classdev *led_cdev, | |
68 | enum led_brightness brightness) | |
69 | { | |
70 | struct delayed_led_classdev *data = container_of(led_cdev, | |
71 | struct delayed_led_classdev, led_classdev); | |
72 | data->new_brightness = brightness; | |
73 | schedule_work(&data->work); | |
74 | } | |
75 | ||
76 | /* HP-specific accelerometer driver ------------------------------------ */ | |
cfce41a6 EP |
77 | |
78 | /* For automatic insertion of the module */ | |
79 | static struct acpi_device_id lis3lv02d_device_ids[] = { | |
80 | {"HPQ0004", 0}, /* HP Mobile Data Protection System PNP */ | |
81 | {"", 0}, | |
82 | }; | |
83 | MODULE_DEVICE_TABLE(acpi, lis3lv02d_device_ids); | |
84 | ||
85 | ||
86 | /** | |
87 | * lis3lv02d_acpi_init - ACPI _INI method: initialize the device. | |
88 | * @handle: the handle of the device | |
89 | * | |
90 | * Returns AE_OK on success. | |
91 | */ | |
92 | acpi_status lis3lv02d_acpi_init(acpi_handle handle) | |
93 | { | |
94 | return acpi_evaluate_object(handle, METHOD_NAME__INI, NULL, NULL); | |
95 | } | |
96 | ||
97 | /** | |
98 | * lis3lv02d_acpi_read - ACPI ALRD method: read a register | |
99 | * @handle: the handle of the device | |
100 | * @reg: the register to read | |
101 | * @ret: result of the operation | |
102 | * | |
103 | * Returns AE_OK on success. | |
104 | */ | |
105 | acpi_status lis3lv02d_acpi_read(acpi_handle handle, int reg, u8 *ret) | |
106 | { | |
107 | union acpi_object arg0 = { ACPI_TYPE_INTEGER }; | |
108 | struct acpi_object_list args = { 1, &arg0 }; | |
109 | unsigned long long lret; | |
110 | acpi_status status; | |
111 | ||
112 | arg0.integer.value = reg; | |
113 | ||
114 | status = acpi_evaluate_integer(handle, "ALRD", &args, &lret); | |
115 | *ret = lret; | |
116 | return status; | |
117 | } | |
118 | ||
119 | /** | |
120 | * lis3lv02d_acpi_write - ACPI ALWR method: write to a register | |
121 | * @handle: the handle of the device | |
122 | * @reg: the register to write to | |
123 | * @val: the value to write | |
124 | * | |
125 | * Returns AE_OK on success. | |
126 | */ | |
127 | acpi_status lis3lv02d_acpi_write(acpi_handle handle, int reg, u8 val) | |
128 | { | |
129 | unsigned long long ret; /* Not used when writting */ | |
130 | union acpi_object in_obj[2]; | |
131 | struct acpi_object_list args = { 2, in_obj }; | |
132 | ||
133 | in_obj[0].type = ACPI_TYPE_INTEGER; | |
134 | in_obj[0].integer.value = reg; | |
135 | in_obj[1].type = ACPI_TYPE_INTEGER; | |
136 | in_obj[1].integer.value = val; | |
137 | ||
138 | return acpi_evaluate_integer(handle, "ALWR", &args, &ret); | |
139 | } | |
140 | ||
141 | static int lis3lv02d_dmi_matched(const struct dmi_system_id *dmi) | |
142 | { | |
be84cfc5 | 143 | lis3_dev.ac = *((struct axis_conversion *)dmi->driver_data); |
cfce41a6 EP |
144 | printk(KERN_INFO DRIVER_NAME ": hardware type %s found.\n", dmi->ident); |
145 | ||
146 | return 1; | |
147 | } | |
148 | ||
149 | /* Represents, for each axis seen by userspace, the corresponding hw axis (+1). | |
150 | * If the value is negative, the opposite of the hw value is used. */ | |
151 | static struct axis_conversion lis3lv02d_axis_normal = {1, 2, 3}; | |
152 | static struct axis_conversion lis3lv02d_axis_y_inverted = {1, -2, 3}; | |
153 | static struct axis_conversion lis3lv02d_axis_x_inverted = {-1, 2, 3}; | |
154 | static struct axis_conversion lis3lv02d_axis_z_inverted = {1, 2, -3}; | |
155 | static struct axis_conversion lis3lv02d_axis_xy_rotated_left = {-2, 1, 3}; | |
80eda5fb | 156 | static struct axis_conversion lis3lv02d_axis_xy_rotated_left_usd = {-2, 1, -3}; |
cfce41a6 | 157 | static struct axis_conversion lis3lv02d_axis_xy_swap_inverted = {-2, -1, 3}; |
6bfef2b3 | 158 | static struct axis_conversion lis3lv02d_axis_xy_rotated_right = {2, -1, 3}; |
87357d27 | 159 | static struct axis_conversion lis3lv02d_axis_xy_swap_yz_inverted = {2, -1, -3}; |
cfce41a6 EP |
160 | |
161 | #define AXIS_DMI_MATCH(_ident, _name, _axis) { \ | |
162 | .ident = _ident, \ | |
163 | .callback = lis3lv02d_dmi_matched, \ | |
164 | .matches = { \ | |
165 | DMI_MATCH(DMI_PRODUCT_NAME, _name) \ | |
166 | }, \ | |
167 | .driver_data = &lis3lv02d_axis_##_axis \ | |
168 | } | |
9ccf3b5e GB |
169 | |
170 | #define AXIS_DMI_MATCH2(_ident, _class1, _name1, \ | |
171 | _class2, _name2, \ | |
172 | _axis) { \ | |
173 | .ident = _ident, \ | |
174 | .callback = lis3lv02d_dmi_matched, \ | |
175 | .matches = { \ | |
176 | DMI_MATCH(DMI_##_class1, _name1), \ | |
177 | DMI_MATCH(DMI_##_class2, _name2), \ | |
178 | }, \ | |
179 | .driver_data = &lis3lv02d_axis_##_axis \ | |
180 | } | |
cfce41a6 EP |
181 | static struct dmi_system_id lis3lv02d_dmi_ids[] = { |
182 | /* product names are truncated to match all kinds of a same model */ | |
183 | AXIS_DMI_MATCH("NC64x0", "HP Compaq nc64", x_inverted), | |
184 | AXIS_DMI_MATCH("NC84x0", "HP Compaq nc84", z_inverted), | |
185 | AXIS_DMI_MATCH("NX9420", "HP Compaq nx9420", x_inverted), | |
186 | AXIS_DMI_MATCH("NW9440", "HP Compaq nw9440", x_inverted), | |
187 | AXIS_DMI_MATCH("NC2510", "HP Compaq 2510", y_inverted), | |
188 | AXIS_DMI_MATCH("NC8510", "HP Compaq 8510", xy_swap_inverted), | |
189 | AXIS_DMI_MATCH("HP2133", "HP 2133", xy_rotated_left), | |
9d7639d3 | 190 | AXIS_DMI_MATCH("HP2140", "HP 2140", xy_swap_inverted), |
80eda5fb | 191 | AXIS_DMI_MATCH("NC653x", "HP Compaq 653", xy_rotated_left_usd), |
c77a022d | 192 | AXIS_DMI_MATCH("NC673x", "HP Compaq 673", xy_rotated_left_usd), |
6bfef2b3 | 193 | AXIS_DMI_MATCH("NC651xx", "HP Compaq 651", xy_rotated_right), |
87357d27 | 194 | AXIS_DMI_MATCH("NC671xx", "HP Compaq 671", xy_swap_yz_inverted), |
9ccf3b5e GB |
195 | /* Intel-based HP Pavilion dv5 */ |
196 | AXIS_DMI_MATCH2("HPDV5_I", | |
197 | PRODUCT_NAME, "HP Pavilion dv5", | |
198 | BOARD_NAME, "3603", | |
199 | x_inverted), | |
200 | /* AMD-based HP Pavilion dv5 */ | |
201 | AXIS_DMI_MATCH2("HPDV5_A", | |
202 | PRODUCT_NAME, "HP Pavilion dv5", | |
203 | BOARD_NAME, "3600", | |
204 | y_inverted), | |
9d7639d3 | 205 | AXIS_DMI_MATCH("DV7", "HP Pavilion dv7", x_inverted), |
cfce41a6 EP |
206 | { NULL, } |
207 | /* Laptop models without axis info (yet): | |
cfce41a6 EP |
208 | * "NC6910" "HP Compaq 6910" |
209 | * HP Compaq 8710x Notebook PC / Mobile Workstation | |
210 | * "NC2400" "HP Compaq nc2400" | |
211 | * "NX74x0" "HP Compaq nx74" | |
212 | * "NX6325" "HP Compaq nx6325" | |
213 | * "NC4400" "HP Compaq nc4400" | |
214 | */ | |
215 | }; | |
216 | ||
9e1c9d86 | 217 | static void hpled_set(struct delayed_led_classdev *led_cdev, enum led_brightness value) |
9e0c7978 | 218 | { |
be84cfc5 | 219 | acpi_handle handle = lis3_dev.device->handle; |
9e0c7978 EP |
220 | unsigned long long ret; /* Not used when writing */ |
221 | union acpi_object in_obj[1]; | |
222 | struct acpi_object_list args = { 1, in_obj }; | |
223 | ||
224 | in_obj[0].type = ACPI_TYPE_INTEGER; | |
9e1c9d86 | 225 | in_obj[0].integer.value = !!value; |
9e0c7978 | 226 | |
9e1c9d86 | 227 | acpi_evaluate_integer(handle, "ALED", &args, &ret); |
9e0c7978 EP |
228 | } |
229 | ||
9e1c9d86 PM |
230 | static struct delayed_led_classdev hpled_led = { |
231 | .led_classdev = { | |
232 | .name = "hp::hddprotect", | |
233 | .default_trigger = "none", | |
234 | .brightness_set = delayed_sysfs_set, | |
235 | .flags = LED_CORE_SUSPENDRESUME, | |
236 | }, | |
237 | .set_brightness = hpled_set, | |
9e0c7978 | 238 | }; |
cfce41a6 | 239 | |
ef2cfc79 PM |
240 | static acpi_status |
241 | lis3lv02d_get_resource(struct acpi_resource *resource, void *context) | |
242 | { | |
243 | if (resource->type == ACPI_RESOURCE_TYPE_EXTENDED_IRQ) { | |
244 | struct acpi_resource_extended_irq *irq; | |
245 | u32 *device_irq = context; | |
246 | ||
247 | irq = &resource->data.extended_irq; | |
248 | *device_irq = irq->interrupts[0]; | |
249 | } | |
250 | ||
251 | return AE_OK; | |
252 | } | |
253 | ||
254 | static void lis3lv02d_enum_resources(struct acpi_device *device) | |
255 | { | |
256 | acpi_status status; | |
257 | ||
258 | status = acpi_walk_resources(device->handle, METHOD_NAME__CRS, | |
be84cfc5 | 259 | lis3lv02d_get_resource, &lis3_dev.irq); |
ef2cfc79 PM |
260 | if (ACPI_FAILURE(status)) |
261 | printk(KERN_DEBUG DRIVER_NAME ": Error getting resources\n"); | |
262 | } | |
263 | ||
137bad32 GB |
264 | static s16 lis3lv02d_read_16(acpi_handle handle, int reg) |
265 | { | |
266 | u8 lo, hi; | |
267 | ||
be84cfc5 PM |
268 | lis3_dev.read(handle, reg - 1, &lo); |
269 | lis3_dev.read(handle, reg, &hi); | |
137bad32 GB |
270 | /* In "12 bit right justified" mode, bit 6, bit 7, bit 8 = bit 5 */ |
271 | return (s16)((hi << 8) | lo); | |
272 | } | |
273 | ||
274 | static s16 lis3lv02d_read_8(acpi_handle handle, int reg) | |
275 | { | |
276 | s8 lo; | |
be84cfc5 | 277 | lis3_dev.read(handle, reg, &lo); |
137bad32 GB |
278 | return lo; |
279 | } | |
280 | ||
cfce41a6 EP |
281 | static int lis3lv02d_add(struct acpi_device *device) |
282 | { | |
9e0c7978 | 283 | int ret; |
cfce41a6 EP |
284 | |
285 | if (!device) | |
286 | return -EINVAL; | |
287 | ||
be84cfc5 PM |
288 | lis3_dev.device = device; |
289 | lis3_dev.init = lis3lv02d_acpi_init; | |
290 | lis3_dev.read = lis3lv02d_acpi_read; | |
291 | lis3_dev.write = lis3lv02d_acpi_write; | |
cfce41a6 EP |
292 | strcpy(acpi_device_name(device), DRIVER_NAME); |
293 | strcpy(acpi_device_class(device), ACPI_MDPS_CLASS); | |
be84cfc5 | 294 | device->driver_data = &lis3_dev; |
cfce41a6 | 295 | |
be84cfc5 PM |
296 | lis3lv02d_acpi_read(device->handle, WHO_AM_I, &lis3_dev.whoami); |
297 | switch (lis3_dev.whoami) { | |
137bad32 GB |
298 | case LIS_DOUBLE_ID: |
299 | printk(KERN_INFO DRIVER_NAME ": 2-byte sensor found\n"); | |
be84cfc5 PM |
300 | lis3_dev.read_data = lis3lv02d_read_16; |
301 | lis3_dev.mdps_max_val = 2048; | |
137bad32 GB |
302 | break; |
303 | case LIS_SINGLE_ID: | |
304 | printk(KERN_INFO DRIVER_NAME ": 1-byte sensor found\n"); | |
be84cfc5 PM |
305 | lis3_dev.read_data = lis3lv02d_read_8; |
306 | lis3_dev.mdps_max_val = 128; | |
137bad32 GB |
307 | break; |
308 | default: | |
cfce41a6 | 309 | printk(KERN_ERR DRIVER_NAME |
be84cfc5 | 310 | ": unknown sensor type 0x%X\n", lis3_dev.whoami); |
137bad32 | 311 | return -EINVAL; |
cfce41a6 EP |
312 | } |
313 | ||
314 | /* If possible use a "standard" axes order */ | |
315 | if (dmi_check_system(lis3lv02d_dmi_ids) == 0) { | |
316 | printk(KERN_INFO DRIVER_NAME ": laptop model unknown, " | |
317 | "using default axes configuration\n"); | |
be84cfc5 | 318 | lis3_dev.ac = lis3lv02d_axis_normal; |
cfce41a6 EP |
319 | } |
320 | ||
9e1c9d86 PM |
321 | INIT_WORK(&hpled_led.work, delayed_set_status_worker); |
322 | ret = led_classdev_register(NULL, &hpled_led.led_classdev); | |
9e0c7978 EP |
323 | if (ret) |
324 | return ret; | |
325 | ||
ef2cfc79 | 326 | /* obtain IRQ number of our device from ACPI */ |
be84cfc5 | 327 | lis3lv02d_enum_resources(lis3_dev.device); |
ef2cfc79 | 328 | |
be84cfc5 | 329 | ret = lis3lv02d_init_device(&lis3_dev); |
9e0c7978 | 330 | if (ret) { |
9e1c9d86 PM |
331 | flush_work(&hpled_led.work); |
332 | led_classdev_unregister(&hpled_led.led_classdev); | |
9e0c7978 EP |
333 | return ret; |
334 | } | |
335 | ||
336 | return ret; | |
cfce41a6 EP |
337 | } |
338 | ||
339 | static int lis3lv02d_remove(struct acpi_device *device, int type) | |
340 | { | |
341 | if (!device) | |
342 | return -EINVAL; | |
343 | ||
344 | lis3lv02d_joystick_disable(); | |
345 | lis3lv02d_poweroff(device->handle); | |
346 | ||
9e1c9d86 PM |
347 | flush_work(&hpled_led.work); |
348 | led_classdev_unregister(&hpled_led.led_classdev); | |
9e0c7978 | 349 | |
cfce41a6 EP |
350 | return lis3lv02d_remove_fs(); |
351 | } | |
352 | ||
353 | ||
354 | #ifdef CONFIG_PM | |
355 | static int lis3lv02d_suspend(struct acpi_device *device, pm_message_t state) | |
356 | { | |
357 | /* make sure the device is off when we suspend */ | |
358 | lis3lv02d_poweroff(device->handle); | |
359 | return 0; | |
360 | } | |
361 | ||
362 | static int lis3lv02d_resume(struct acpi_device *device) | |
363 | { | |
364 | /* put back the device in the right state (ACPI might turn it on) */ | |
be84cfc5 PM |
365 | mutex_lock(&lis3_dev.lock); |
366 | if (lis3_dev.usage > 0) | |
cfce41a6 EP |
367 | lis3lv02d_poweron(device->handle); |
368 | else | |
369 | lis3lv02d_poweroff(device->handle); | |
be84cfc5 | 370 | mutex_unlock(&lis3_dev.lock); |
cfce41a6 EP |
371 | return 0; |
372 | } | |
373 | #else | |
374 | #define lis3lv02d_suspend NULL | |
375 | #define lis3lv02d_resume NULL | |
376 | #endif | |
377 | ||
378 | /* For the HP MDPS aka 3D Driveguard */ | |
379 | static struct acpi_driver lis3lv02d_driver = { | |
380 | .name = DRIVER_NAME, | |
381 | .class = ACPI_MDPS_CLASS, | |
382 | .ids = lis3lv02d_device_ids, | |
383 | .ops = { | |
384 | .add = lis3lv02d_add, | |
385 | .remove = lis3lv02d_remove, | |
386 | .suspend = lis3lv02d_suspend, | |
387 | .resume = lis3lv02d_resume, | |
388 | } | |
389 | }; | |
390 | ||
391 | static int __init lis3lv02d_init_module(void) | |
392 | { | |
393 | int ret; | |
394 | ||
395 | if (acpi_disabled) | |
396 | return -ENODEV; | |
397 | ||
398 | ret = acpi_bus_register_driver(&lis3lv02d_driver); | |
399 | if (ret < 0) | |
400 | return ret; | |
401 | ||
402 | printk(KERN_INFO DRIVER_NAME " driver loaded.\n"); | |
403 | ||
404 | return 0; | |
405 | } | |
406 | ||
407 | static void __exit lis3lv02d_exit_module(void) | |
408 | { | |
409 | acpi_bus_unregister_driver(&lis3lv02d_driver); | |
410 | } | |
411 | ||
9e0c7978 | 412 | MODULE_DESCRIPTION("Glue between LIS3LV02Dx and HP ACPI BIOS and support for disk protection LED."); |
cfce41a6 EP |
413 | MODULE_AUTHOR("Yan Burman, Eric Piel, Pavel Machek"); |
414 | MODULE_LICENSE("GPL"); | |
415 | ||
416 | module_init(lis3lv02d_init_module); | |
417 | module_exit(lis3lv02d_exit_module); | |
418 |