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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 | ||
cfce41a6 EP |
240 | static int lis3lv02d_add(struct acpi_device *device) |
241 | { | |
242 | u8 val; | |
9e0c7978 | 243 | int ret; |
cfce41a6 EP |
244 | |
245 | if (!device) | |
246 | return -EINVAL; | |
247 | ||
248 | adev.device = device; | |
249 | adev.init = lis3lv02d_acpi_init; | |
250 | adev.read = lis3lv02d_acpi_read; | |
251 | adev.write = lis3lv02d_acpi_write; | |
252 | strcpy(acpi_device_name(device), DRIVER_NAME); | |
253 | strcpy(acpi_device_class(device), ACPI_MDPS_CLASS); | |
254 | device->driver_data = &adev; | |
255 | ||
256 | lis3lv02d_acpi_read(device->handle, WHO_AM_I, &val); | |
257 | if ((val != LIS3LV02DL_ID) && (val != LIS302DL_ID)) { | |
258 | printk(KERN_ERR DRIVER_NAME | |
259 | ": Accelerometer chip not LIS3LV02D{L,Q}\n"); | |
260 | } | |
261 | ||
262 | /* If possible use a "standard" axes order */ | |
263 | if (dmi_check_system(lis3lv02d_dmi_ids) == 0) { | |
264 | printk(KERN_INFO DRIVER_NAME ": laptop model unknown, " | |
265 | "using default axes configuration\n"); | |
266 | adev.ac = lis3lv02d_axis_normal; | |
267 | } | |
268 | ||
9e1c9d86 PM |
269 | INIT_WORK(&hpled_led.work, delayed_set_status_worker); |
270 | ret = led_classdev_register(NULL, &hpled_led.led_classdev); | |
9e0c7978 EP |
271 | if (ret) |
272 | return ret; | |
273 | ||
ef2cfc79 PM |
274 | /* obtain IRQ number of our device from ACPI */ |
275 | lis3lv02d_enum_resources(adev.device); | |
276 | ||
9e0c7978 EP |
277 | ret = lis3lv02d_init_device(&adev); |
278 | if (ret) { | |
9e1c9d86 PM |
279 | flush_work(&hpled_led.work); |
280 | led_classdev_unregister(&hpled_led.led_classdev); | |
9e0c7978 EP |
281 | return ret; |
282 | } | |
283 | ||
284 | return ret; | |
cfce41a6 EP |
285 | } |
286 | ||
287 | static int lis3lv02d_remove(struct acpi_device *device, int type) | |
288 | { | |
289 | if (!device) | |
290 | return -EINVAL; | |
291 | ||
292 | lis3lv02d_joystick_disable(); | |
293 | lis3lv02d_poweroff(device->handle); | |
294 | ||
9e1c9d86 PM |
295 | flush_work(&hpled_led.work); |
296 | led_classdev_unregister(&hpled_led.led_classdev); | |
9e0c7978 | 297 | |
cfce41a6 EP |
298 | return lis3lv02d_remove_fs(); |
299 | } | |
300 | ||
301 | ||
302 | #ifdef CONFIG_PM | |
303 | static int lis3lv02d_suspend(struct acpi_device *device, pm_message_t state) | |
304 | { | |
305 | /* make sure the device is off when we suspend */ | |
306 | lis3lv02d_poweroff(device->handle); | |
307 | return 0; | |
308 | } | |
309 | ||
310 | static int lis3lv02d_resume(struct acpi_device *device) | |
311 | { | |
312 | /* put back the device in the right state (ACPI might turn it on) */ | |
313 | mutex_lock(&adev.lock); | |
314 | if (adev.usage > 0) | |
315 | lis3lv02d_poweron(device->handle); | |
316 | else | |
317 | lis3lv02d_poweroff(device->handle); | |
318 | mutex_unlock(&adev.lock); | |
319 | return 0; | |
320 | } | |
321 | #else | |
322 | #define lis3lv02d_suspend NULL | |
323 | #define lis3lv02d_resume NULL | |
324 | #endif | |
325 | ||
326 | /* For the HP MDPS aka 3D Driveguard */ | |
327 | static struct acpi_driver lis3lv02d_driver = { | |
328 | .name = DRIVER_NAME, | |
329 | .class = ACPI_MDPS_CLASS, | |
330 | .ids = lis3lv02d_device_ids, | |
331 | .ops = { | |
332 | .add = lis3lv02d_add, | |
333 | .remove = lis3lv02d_remove, | |
334 | .suspend = lis3lv02d_suspend, | |
335 | .resume = lis3lv02d_resume, | |
336 | } | |
337 | }; | |
338 | ||
339 | static int __init lis3lv02d_init_module(void) | |
340 | { | |
341 | int ret; | |
342 | ||
343 | if (acpi_disabled) | |
344 | return -ENODEV; | |
345 | ||
346 | ret = acpi_bus_register_driver(&lis3lv02d_driver); | |
347 | if (ret < 0) | |
348 | return ret; | |
349 | ||
350 | printk(KERN_INFO DRIVER_NAME " driver loaded.\n"); | |
351 | ||
352 | return 0; | |
353 | } | |
354 | ||
355 | static void __exit lis3lv02d_exit_module(void) | |
356 | { | |
357 | acpi_bus_unregister_driver(&lis3lv02d_driver); | |
358 | } | |
359 | ||
9e0c7978 | 360 | MODULE_DESCRIPTION("Glue between LIS3LV02Dx and HP ACPI BIOS and support for disk protection LED."); |
cfce41a6 EP |
361 | MODULE_AUTHOR("Yan Burman, Eric Piel, Pavel Machek"); |
362 | MODULE_LICENSE("GPL"); | |
363 | ||
364 | module_init(lis3lv02d_init_module); | |
365 | module_exit(lis3lv02d_exit_module); | |
366 |