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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 | { | |
143 | adev.ac = *((struct axis_conversion *)dmi->driver_data); | |
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 | } | |
169 | static struct dmi_system_id lis3lv02d_dmi_ids[] = { | |
170 | /* product names are truncated to match all kinds of a same model */ | |
171 | AXIS_DMI_MATCH("NC64x0", "HP Compaq nc64", x_inverted), | |
172 | AXIS_DMI_MATCH("NC84x0", "HP Compaq nc84", z_inverted), | |
173 | AXIS_DMI_MATCH("NX9420", "HP Compaq nx9420", x_inverted), | |
174 | AXIS_DMI_MATCH("NW9440", "HP Compaq nw9440", x_inverted), | |
175 | AXIS_DMI_MATCH("NC2510", "HP Compaq 2510", y_inverted), | |
176 | AXIS_DMI_MATCH("NC8510", "HP Compaq 8510", xy_swap_inverted), | |
177 | AXIS_DMI_MATCH("HP2133", "HP 2133", xy_rotated_left), | |
80eda5fb | 178 | AXIS_DMI_MATCH("NC653x", "HP Compaq 653", xy_rotated_left_usd), |
c77a022d | 179 | AXIS_DMI_MATCH("NC673x", "HP Compaq 673", xy_rotated_left_usd), |
6bfef2b3 | 180 | AXIS_DMI_MATCH("NC651xx", "HP Compaq 651", xy_rotated_right), |
87357d27 | 181 | AXIS_DMI_MATCH("NC671xx", "HP Compaq 671", xy_swap_yz_inverted), |
cfce41a6 EP |
182 | { NULL, } |
183 | /* Laptop models without axis info (yet): | |
cfce41a6 EP |
184 | * "NC6910" "HP Compaq 6910" |
185 | * HP Compaq 8710x Notebook PC / Mobile Workstation | |
186 | * "NC2400" "HP Compaq nc2400" | |
187 | * "NX74x0" "HP Compaq nx74" | |
188 | * "NX6325" "HP Compaq nx6325" | |
189 | * "NC4400" "HP Compaq nc4400" | |
190 | */ | |
191 | }; | |
192 | ||
9e1c9d86 | 193 | static void hpled_set(struct delayed_led_classdev *led_cdev, enum led_brightness value) |
9e0c7978 | 194 | { |
9e1c9d86 | 195 | acpi_handle handle = adev.device->handle; |
9e0c7978 EP |
196 | unsigned long long ret; /* Not used when writing */ |
197 | union acpi_object in_obj[1]; | |
198 | struct acpi_object_list args = { 1, in_obj }; | |
199 | ||
200 | in_obj[0].type = ACPI_TYPE_INTEGER; | |
9e1c9d86 | 201 | in_obj[0].integer.value = !!value; |
9e0c7978 | 202 | |
9e1c9d86 | 203 | acpi_evaluate_integer(handle, "ALED", &args, &ret); |
9e0c7978 EP |
204 | } |
205 | ||
9e1c9d86 PM |
206 | static struct delayed_led_classdev hpled_led = { |
207 | .led_classdev = { | |
208 | .name = "hp::hddprotect", | |
209 | .default_trigger = "none", | |
210 | .brightness_set = delayed_sysfs_set, | |
211 | .flags = LED_CORE_SUSPENDRESUME, | |
212 | }, | |
213 | .set_brightness = hpled_set, | |
9e0c7978 | 214 | }; |
cfce41a6 | 215 | |
ef2cfc79 PM |
216 | static acpi_status |
217 | lis3lv02d_get_resource(struct acpi_resource *resource, void *context) | |
218 | { | |
219 | if (resource->type == ACPI_RESOURCE_TYPE_EXTENDED_IRQ) { | |
220 | struct acpi_resource_extended_irq *irq; | |
221 | u32 *device_irq = context; | |
222 | ||
223 | irq = &resource->data.extended_irq; | |
224 | *device_irq = irq->interrupts[0]; | |
225 | } | |
226 | ||
227 | return AE_OK; | |
228 | } | |
229 | ||
230 | static void lis3lv02d_enum_resources(struct acpi_device *device) | |
231 | { | |
232 | acpi_status status; | |
233 | ||
234 | status = acpi_walk_resources(device->handle, METHOD_NAME__CRS, | |
235 | lis3lv02d_get_resource, &adev.irq); | |
236 | if (ACPI_FAILURE(status)) | |
237 | printk(KERN_DEBUG DRIVER_NAME ": Error getting resources\n"); | |
238 | } | |
239 | ||
137bad32 GB |
240 | static s16 lis3lv02d_read_16(acpi_handle handle, int reg) |
241 | { | |
242 | u8 lo, hi; | |
243 | ||
244 | adev.read(handle, reg - 1, &lo); | |
245 | adev.read(handle, reg, &hi); | |
246 | /* In "12 bit right justified" mode, bit 6, bit 7, bit 8 = bit 5 */ | |
247 | return (s16)((hi << 8) | lo); | |
248 | } | |
249 | ||
250 | static s16 lis3lv02d_read_8(acpi_handle handle, int reg) | |
251 | { | |
252 | s8 lo; | |
253 | adev.read(handle, reg, &lo); | |
254 | return lo; | |
255 | } | |
256 | ||
cfce41a6 EP |
257 | static int lis3lv02d_add(struct acpi_device *device) |
258 | { | |
9e0c7978 | 259 | int ret; |
cfce41a6 EP |
260 | |
261 | if (!device) | |
262 | return -EINVAL; | |
263 | ||
264 | adev.device = device; | |
265 | adev.init = lis3lv02d_acpi_init; | |
266 | adev.read = lis3lv02d_acpi_read; | |
267 | adev.write = lis3lv02d_acpi_write; | |
268 | strcpy(acpi_device_name(device), DRIVER_NAME); | |
269 | strcpy(acpi_device_class(device), ACPI_MDPS_CLASS); | |
270 | device->driver_data = &adev; | |
271 | ||
137bad32 GB |
272 | lis3lv02d_acpi_read(device->handle, WHO_AM_I, &adev.whoami); |
273 | switch (adev.whoami) { | |
274 | case LIS_DOUBLE_ID: | |
275 | printk(KERN_INFO DRIVER_NAME ": 2-byte sensor found\n"); | |
276 | adev.read_data = lis3lv02d_read_16; | |
277 | adev.mdps_max_val = 2048; | |
278 | break; | |
279 | case LIS_SINGLE_ID: | |
280 | printk(KERN_INFO DRIVER_NAME ": 1-byte sensor found\n"); | |
281 | adev.read_data = lis3lv02d_read_8; | |
282 | adev.mdps_max_val = 128; | |
283 | break; | |
284 | default: | |
cfce41a6 | 285 | printk(KERN_ERR DRIVER_NAME |
137bad32 GB |
286 | ": unknown sensor type 0x%X\n", adev.whoami); |
287 | return -EINVAL; | |
cfce41a6 EP |
288 | } |
289 | ||
290 | /* If possible use a "standard" axes order */ | |
291 | if (dmi_check_system(lis3lv02d_dmi_ids) == 0) { | |
292 | printk(KERN_INFO DRIVER_NAME ": laptop model unknown, " | |
293 | "using default axes configuration\n"); | |
294 | adev.ac = lis3lv02d_axis_normal; | |
295 | } | |
296 | ||
9e1c9d86 PM |
297 | INIT_WORK(&hpled_led.work, delayed_set_status_worker); |
298 | ret = led_classdev_register(NULL, &hpled_led.led_classdev); | |
9e0c7978 EP |
299 | if (ret) |
300 | return ret; | |
301 | ||
ef2cfc79 PM |
302 | /* obtain IRQ number of our device from ACPI */ |
303 | lis3lv02d_enum_resources(adev.device); | |
304 | ||
9e0c7978 EP |
305 | ret = lis3lv02d_init_device(&adev); |
306 | if (ret) { | |
9e1c9d86 PM |
307 | flush_work(&hpled_led.work); |
308 | led_classdev_unregister(&hpled_led.led_classdev); | |
9e0c7978 EP |
309 | return ret; |
310 | } | |
311 | ||
312 | return ret; | |
cfce41a6 EP |
313 | } |
314 | ||
315 | static int lis3lv02d_remove(struct acpi_device *device, int type) | |
316 | { | |
317 | if (!device) | |
318 | return -EINVAL; | |
319 | ||
320 | lis3lv02d_joystick_disable(); | |
321 | lis3lv02d_poweroff(device->handle); | |
322 | ||
9e1c9d86 PM |
323 | flush_work(&hpled_led.work); |
324 | led_classdev_unregister(&hpled_led.led_classdev); | |
9e0c7978 | 325 | |
cfce41a6 EP |
326 | return lis3lv02d_remove_fs(); |
327 | } | |
328 | ||
329 | ||
330 | #ifdef CONFIG_PM | |
331 | static int lis3lv02d_suspend(struct acpi_device *device, pm_message_t state) | |
332 | { | |
333 | /* make sure the device is off when we suspend */ | |
334 | lis3lv02d_poweroff(device->handle); | |
335 | return 0; | |
336 | } | |
337 | ||
338 | static int lis3lv02d_resume(struct acpi_device *device) | |
339 | { | |
340 | /* put back the device in the right state (ACPI might turn it on) */ | |
341 | mutex_lock(&adev.lock); | |
342 | if (adev.usage > 0) | |
343 | lis3lv02d_poweron(device->handle); | |
344 | else | |
345 | lis3lv02d_poweroff(device->handle); | |
346 | mutex_unlock(&adev.lock); | |
347 | return 0; | |
348 | } | |
349 | #else | |
350 | #define lis3lv02d_suspend NULL | |
351 | #define lis3lv02d_resume NULL | |
352 | #endif | |
353 | ||
354 | /* For the HP MDPS aka 3D Driveguard */ | |
355 | static struct acpi_driver lis3lv02d_driver = { | |
356 | .name = DRIVER_NAME, | |
357 | .class = ACPI_MDPS_CLASS, | |
358 | .ids = lis3lv02d_device_ids, | |
359 | .ops = { | |
360 | .add = lis3lv02d_add, | |
361 | .remove = lis3lv02d_remove, | |
362 | .suspend = lis3lv02d_suspend, | |
363 | .resume = lis3lv02d_resume, | |
364 | } | |
365 | }; | |
366 | ||
367 | static int __init lis3lv02d_init_module(void) | |
368 | { | |
369 | int ret; | |
370 | ||
371 | if (acpi_disabled) | |
372 | return -ENODEV; | |
373 | ||
374 | ret = acpi_bus_register_driver(&lis3lv02d_driver); | |
375 | if (ret < 0) | |
376 | return ret; | |
377 | ||
378 | printk(KERN_INFO DRIVER_NAME " driver loaded.\n"); | |
379 | ||
380 | return 0; | |
381 | } | |
382 | ||
383 | static void __exit lis3lv02d_exit_module(void) | |
384 | { | |
385 | acpi_bus_unregister_driver(&lis3lv02d_driver); | |
386 | } | |
387 | ||
9e0c7978 | 388 | MODULE_DESCRIPTION("Glue between LIS3LV02Dx and HP ACPI BIOS and support for disk protection LED."); |
cfce41a6 EP |
389 | MODULE_AUTHOR("Yan Burman, Eric Piel, Pavel Machek"); |
390 | MODULE_LICENSE("GPL"); | |
391 | ||
392 | module_init(lis3lv02d_init_module); | |
393 | module_exit(lis3lv02d_exit_module); | |
394 |