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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> | |
cfce41a6 EP |
30 | #include <linux/delay.h> |
31 | #include <linux/wait.h> | |
32 | #include <linux/poll.h> | |
33 | #include <linux/freezer.h> | |
cfce41a6 | 34 | #include <linux/uaccess.h> |
9e0c7978 | 35 | #include <linux/leds.h> |
cfce41a6 EP |
36 | #include <acpi/acpi_drivers.h> |
37 | #include <asm/atomic.h> | |
38 | #include "lis3lv02d.h" | |
39 | ||
40 | #define DRIVER_NAME "lis3lv02d" | |
41 | #define ACPI_MDPS_CLASS "accelerometer" | |
42 | ||
9e1c9d86 PM |
43 | /* Delayed LEDs infrastructure ------------------------------------ */ |
44 | ||
45 | /* Special LED class that can defer work */ | |
46 | struct delayed_led_classdev { | |
47 | struct led_classdev led_classdev; | |
48 | struct work_struct work; | |
49 | enum led_brightness new_brightness; | |
50 | ||
51 | unsigned int led; /* For driver */ | |
52 | void (*set_brightness)(struct delayed_led_classdev *data, enum led_brightness value); | |
53 | }; | |
54 | ||
55 | static inline void delayed_set_status_worker(struct work_struct *work) | |
56 | { | |
57 | struct delayed_led_classdev *data = | |
58 | container_of(work, struct delayed_led_classdev, work); | |
59 | ||
60 | data->set_brightness(data, data->new_brightness); | |
61 | } | |
62 | ||
63 | static inline void delayed_sysfs_set(struct led_classdev *led_cdev, | |
64 | enum led_brightness brightness) | |
65 | { | |
66 | struct delayed_led_classdev *data = container_of(led_cdev, | |
67 | struct delayed_led_classdev, led_classdev); | |
68 | data->new_brightness = brightness; | |
69 | schedule_work(&data->work); | |
70 | } | |
71 | ||
72 | /* HP-specific accelerometer driver ------------------------------------ */ | |
cfce41a6 EP |
73 | |
74 | /* For automatic insertion of the module */ | |
75 | static struct acpi_device_id lis3lv02d_device_ids[] = { | |
76 | {"HPQ0004", 0}, /* HP Mobile Data Protection System PNP */ | |
77 | {"", 0}, | |
78 | }; | |
79 | MODULE_DEVICE_TABLE(acpi, lis3lv02d_device_ids); | |
80 | ||
81 | ||
82 | /** | |
83 | * lis3lv02d_acpi_init - ACPI _INI method: initialize the device. | |
a38da2ed | 84 | * @lis3: pointer to the device struct |
cfce41a6 | 85 | * |
a38da2ed | 86 | * Returns 0 on success. |
cfce41a6 | 87 | */ |
a38da2ed | 88 | int lis3lv02d_acpi_init(struct lis3lv02d *lis3) |
cfce41a6 | 89 | { |
a38da2ed DM |
90 | struct acpi_device *dev = lis3->bus_priv; |
91 | if (acpi_evaluate_object(dev->handle, METHOD_NAME__INI, | |
92 | NULL, NULL) != AE_OK) | |
93 | return -EINVAL; | |
94 | ||
95 | return 0; | |
cfce41a6 EP |
96 | } |
97 | ||
98 | /** | |
99 | * lis3lv02d_acpi_read - ACPI ALRD method: read a register | |
a38da2ed | 100 | * @lis3: pointer to the device struct |
cfce41a6 EP |
101 | * @reg: the register to read |
102 | * @ret: result of the operation | |
103 | * | |
a38da2ed | 104 | * Returns 0 on success. |
cfce41a6 | 105 | */ |
a38da2ed | 106 | int lis3lv02d_acpi_read(struct lis3lv02d *lis3, int reg, u8 *ret) |
cfce41a6 | 107 | { |
a38da2ed | 108 | struct acpi_device *dev = lis3->bus_priv; |
cfce41a6 EP |
109 | union acpi_object arg0 = { ACPI_TYPE_INTEGER }; |
110 | struct acpi_object_list args = { 1, &arg0 }; | |
111 | unsigned long long lret; | |
112 | acpi_status status; | |
113 | ||
114 | arg0.integer.value = reg; | |
115 | ||
a38da2ed | 116 | status = acpi_evaluate_integer(dev->handle, "ALRD", &args, &lret); |
cfce41a6 | 117 | *ret = lret; |
a38da2ed | 118 | return (status != AE_OK) ? -EINVAL : 0; |
cfce41a6 EP |
119 | } |
120 | ||
121 | /** | |
122 | * lis3lv02d_acpi_write - ACPI ALWR method: write to a register | |
a38da2ed | 123 | * @lis3: pointer to the device struct |
cfce41a6 EP |
124 | * @reg: the register to write to |
125 | * @val: the value to write | |
126 | * | |
a38da2ed | 127 | * Returns 0 on success. |
cfce41a6 | 128 | */ |
a38da2ed | 129 | int lis3lv02d_acpi_write(struct lis3lv02d *lis3, int reg, u8 val) |
cfce41a6 | 130 | { |
a38da2ed | 131 | struct acpi_device *dev = lis3->bus_priv; |
cfce41a6 EP |
132 | unsigned long long ret; /* Not used when writting */ |
133 | union acpi_object in_obj[2]; | |
134 | struct acpi_object_list args = { 2, in_obj }; | |
135 | ||
136 | in_obj[0].type = ACPI_TYPE_INTEGER; | |
137 | in_obj[0].integer.value = reg; | |
138 | in_obj[1].type = ACPI_TYPE_INTEGER; | |
139 | in_obj[1].integer.value = val; | |
140 | ||
a38da2ed DM |
141 | if (acpi_evaluate_integer(dev->handle, "ALWR", &args, &ret) != AE_OK) |
142 | return -EINVAL; | |
143 | ||
144 | return 0; | |
cfce41a6 EP |
145 | } |
146 | ||
147 | static int lis3lv02d_dmi_matched(const struct dmi_system_id *dmi) | |
148 | { | |
be84cfc5 | 149 | lis3_dev.ac = *((struct axis_conversion *)dmi->driver_data); |
cfce41a6 EP |
150 | printk(KERN_INFO DRIVER_NAME ": hardware type %s found.\n", dmi->ident); |
151 | ||
152 | return 1; | |
153 | } | |
154 | ||
155 | /* Represents, for each axis seen by userspace, the corresponding hw axis (+1). | |
156 | * If the value is negative, the opposite of the hw value is used. */ | |
157 | static struct axis_conversion lis3lv02d_axis_normal = {1, 2, 3}; | |
158 | static struct axis_conversion lis3lv02d_axis_y_inverted = {1, -2, 3}; | |
159 | static struct axis_conversion lis3lv02d_axis_x_inverted = {-1, 2, 3}; | |
160 | static struct axis_conversion lis3lv02d_axis_z_inverted = {1, 2, -3}; | |
0093716e | 161 | static struct axis_conversion lis3lv02d_axis_xy_swap = {2, 1, 3}; |
cfce41a6 | 162 | static struct axis_conversion lis3lv02d_axis_xy_rotated_left = {-2, 1, 3}; |
80eda5fb | 163 | static struct axis_conversion lis3lv02d_axis_xy_rotated_left_usd = {-2, 1, -3}; |
cfce41a6 | 164 | static struct axis_conversion lis3lv02d_axis_xy_swap_inverted = {-2, -1, 3}; |
6bfef2b3 | 165 | static struct axis_conversion lis3lv02d_axis_xy_rotated_right = {2, -1, 3}; |
87357d27 | 166 | static struct axis_conversion lis3lv02d_axis_xy_swap_yz_inverted = {2, -1, -3}; |
cfce41a6 EP |
167 | |
168 | #define AXIS_DMI_MATCH(_ident, _name, _axis) { \ | |
169 | .ident = _ident, \ | |
170 | .callback = lis3lv02d_dmi_matched, \ | |
171 | .matches = { \ | |
172 | DMI_MATCH(DMI_PRODUCT_NAME, _name) \ | |
173 | }, \ | |
174 | .driver_data = &lis3lv02d_axis_##_axis \ | |
175 | } | |
9ccf3b5e GB |
176 | |
177 | #define AXIS_DMI_MATCH2(_ident, _class1, _name1, \ | |
178 | _class2, _name2, \ | |
179 | _axis) { \ | |
180 | .ident = _ident, \ | |
181 | .callback = lis3lv02d_dmi_matched, \ | |
182 | .matches = { \ | |
183 | DMI_MATCH(DMI_##_class1, _name1), \ | |
184 | DMI_MATCH(DMI_##_class2, _name2), \ | |
185 | }, \ | |
186 | .driver_data = &lis3lv02d_axis_##_axis \ | |
187 | } | |
cfce41a6 EP |
188 | static struct dmi_system_id lis3lv02d_dmi_ids[] = { |
189 | /* product names are truncated to match all kinds of a same model */ | |
190 | AXIS_DMI_MATCH("NC64x0", "HP Compaq nc64", x_inverted), | |
191 | AXIS_DMI_MATCH("NC84x0", "HP Compaq nc84", z_inverted), | |
192 | AXIS_DMI_MATCH("NX9420", "HP Compaq nx9420", x_inverted), | |
193 | AXIS_DMI_MATCH("NW9440", "HP Compaq nw9440", x_inverted), | |
194 | AXIS_DMI_MATCH("NC2510", "HP Compaq 2510", y_inverted), | |
0093716e | 195 | AXIS_DMI_MATCH("NC2710", "HP Compaq 2710", xy_swap), |
cfce41a6 EP |
196 | AXIS_DMI_MATCH("NC8510", "HP Compaq 8510", xy_swap_inverted), |
197 | AXIS_DMI_MATCH("HP2133", "HP 2133", xy_rotated_left), | |
9d7639d3 | 198 | AXIS_DMI_MATCH("HP2140", "HP 2140", xy_swap_inverted), |
80eda5fb | 199 | AXIS_DMI_MATCH("NC653x", "HP Compaq 653", xy_rotated_left_usd), |
c77a022d | 200 | AXIS_DMI_MATCH("NC673x", "HP Compaq 673", xy_rotated_left_usd), |
6bfef2b3 | 201 | AXIS_DMI_MATCH("NC651xx", "HP Compaq 651", xy_rotated_right), |
0093716e EP |
202 | AXIS_DMI_MATCH("NC6710x", "HP Compaq 6710", xy_swap_yz_inverted), |
203 | AXIS_DMI_MATCH("NC6715x", "HP Compaq 6715", y_inverted), | |
204 | AXIS_DMI_MATCH("NC693xx", "HP EliteBook 693", xy_rotated_right), | |
9ccf3b5e GB |
205 | /* Intel-based HP Pavilion dv5 */ |
206 | AXIS_DMI_MATCH2("HPDV5_I", | |
207 | PRODUCT_NAME, "HP Pavilion dv5", | |
208 | BOARD_NAME, "3603", | |
209 | x_inverted), | |
210 | /* AMD-based HP Pavilion dv5 */ | |
211 | AXIS_DMI_MATCH2("HPDV5_A", | |
212 | PRODUCT_NAME, "HP Pavilion dv5", | |
213 | BOARD_NAME, "3600", | |
214 | y_inverted), | |
9d7639d3 | 215 | AXIS_DMI_MATCH("DV7", "HP Pavilion dv7", x_inverted), |
12a324b6 | 216 | AXIS_DMI_MATCH("HP8710", "HP Compaq 8710", y_inverted), |
cfce41a6 EP |
217 | { NULL, } |
218 | /* Laptop models without axis info (yet): | |
cfce41a6 | 219 | * "NC6910" "HP Compaq 6910" |
cfce41a6 EP |
220 | * "NC2400" "HP Compaq nc2400" |
221 | * "NX74x0" "HP Compaq nx74" | |
222 | * "NX6325" "HP Compaq nx6325" | |
223 | * "NC4400" "HP Compaq nc4400" | |
224 | */ | |
225 | }; | |
226 | ||
9e1c9d86 | 227 | static void hpled_set(struct delayed_led_classdev *led_cdev, enum led_brightness value) |
9e0c7978 | 228 | { |
a38da2ed | 229 | struct acpi_device *dev = lis3_dev.bus_priv; |
9e0c7978 EP |
230 | unsigned long long ret; /* Not used when writing */ |
231 | union acpi_object in_obj[1]; | |
232 | struct acpi_object_list args = { 1, in_obj }; | |
233 | ||
234 | in_obj[0].type = ACPI_TYPE_INTEGER; | |
9e1c9d86 | 235 | in_obj[0].integer.value = !!value; |
9e0c7978 | 236 | |
a38da2ed | 237 | acpi_evaluate_integer(dev->handle, "ALED", &args, &ret); |
9e0c7978 EP |
238 | } |
239 | ||
9e1c9d86 PM |
240 | static struct delayed_led_classdev hpled_led = { |
241 | .led_classdev = { | |
242 | .name = "hp::hddprotect", | |
243 | .default_trigger = "none", | |
244 | .brightness_set = delayed_sysfs_set, | |
245 | .flags = LED_CORE_SUSPENDRESUME, | |
246 | }, | |
247 | .set_brightness = hpled_set, | |
9e0c7978 | 248 | }; |
cfce41a6 | 249 | |
ef2cfc79 PM |
250 | static acpi_status |
251 | lis3lv02d_get_resource(struct acpi_resource *resource, void *context) | |
252 | { | |
253 | if (resource->type == ACPI_RESOURCE_TYPE_EXTENDED_IRQ) { | |
254 | struct acpi_resource_extended_irq *irq; | |
255 | u32 *device_irq = context; | |
256 | ||
257 | irq = &resource->data.extended_irq; | |
258 | *device_irq = irq->interrupts[0]; | |
259 | } | |
260 | ||
261 | return AE_OK; | |
262 | } | |
263 | ||
264 | static void lis3lv02d_enum_resources(struct acpi_device *device) | |
265 | { | |
266 | acpi_status status; | |
267 | ||
268 | status = acpi_walk_resources(device->handle, METHOD_NAME__CRS, | |
be84cfc5 | 269 | lis3lv02d_get_resource, &lis3_dev.irq); |
ef2cfc79 PM |
270 | if (ACPI_FAILURE(status)) |
271 | printk(KERN_DEBUG DRIVER_NAME ": Error getting resources\n"); | |
272 | } | |
273 | ||
cfce41a6 EP |
274 | static int lis3lv02d_add(struct acpi_device *device) |
275 | { | |
9e0c7978 | 276 | int ret; |
cfce41a6 EP |
277 | |
278 | if (!device) | |
279 | return -EINVAL; | |
280 | ||
a38da2ed | 281 | lis3_dev.bus_priv = device; |
be84cfc5 PM |
282 | lis3_dev.init = lis3lv02d_acpi_init; |
283 | lis3_dev.read = lis3lv02d_acpi_read; | |
284 | lis3_dev.write = lis3lv02d_acpi_write; | |
cfce41a6 EP |
285 | strcpy(acpi_device_name(device), DRIVER_NAME); |
286 | strcpy(acpi_device_class(device), ACPI_MDPS_CLASS); | |
be84cfc5 | 287 | device->driver_data = &lis3_dev; |
cfce41a6 | 288 | |
a38da2ed DM |
289 | /* obtain IRQ number of our device from ACPI */ |
290 | lis3lv02d_enum_resources(device); | |
cfce41a6 EP |
291 | |
292 | /* If possible use a "standard" axes order */ | |
293 | if (dmi_check_system(lis3lv02d_dmi_ids) == 0) { | |
294 | printk(KERN_INFO DRIVER_NAME ": laptop model unknown, " | |
295 | "using default axes configuration\n"); | |
be84cfc5 | 296 | lis3_dev.ac = lis3lv02d_axis_normal; |
cfce41a6 EP |
297 | } |
298 | ||
a38da2ed DM |
299 | /* call the core layer do its init */ |
300 | ret = lis3lv02d_init_device(&lis3_dev); | |
9e0c7978 EP |
301 | if (ret) |
302 | return ret; | |
303 | ||
a38da2ed DM |
304 | INIT_WORK(&hpled_led.work, delayed_set_status_worker); |
305 | ret = led_classdev_register(NULL, &hpled_led.led_classdev); | |
9e0c7978 | 306 | if (ret) { |
a38da2ed DM |
307 | lis3lv02d_joystick_disable(); |
308 | lis3lv02d_poweroff(&lis3_dev); | |
9e1c9d86 | 309 | flush_work(&hpled_led.work); |
9e0c7978 EP |
310 | return ret; |
311 | } | |
312 | ||
313 | return ret; | |
cfce41a6 EP |
314 | } |
315 | ||
316 | static int lis3lv02d_remove(struct acpi_device *device, int type) | |
317 | { | |
318 | if (!device) | |
319 | return -EINVAL; | |
320 | ||
321 | lis3lv02d_joystick_disable(); | |
a38da2ed | 322 | lis3lv02d_poweroff(&lis3_dev); |
cfce41a6 | 323 | |
9e1c9d86 PM |
324 | flush_work(&hpled_led.work); |
325 | led_classdev_unregister(&hpled_led.led_classdev); | |
9e0c7978 | 326 | |
a002ee89 | 327 | return lis3lv02d_remove_fs(&lis3_dev); |
cfce41a6 EP |
328 | } |
329 | ||
330 | ||
331 | #ifdef CONFIG_PM | |
332 | static int lis3lv02d_suspend(struct acpi_device *device, pm_message_t state) | |
333 | { | |
334 | /* make sure the device is off when we suspend */ | |
a38da2ed | 335 | lis3lv02d_poweroff(&lis3_dev); |
cfce41a6 EP |
336 | return 0; |
337 | } | |
338 | ||
339 | static int lis3lv02d_resume(struct acpi_device *device) | |
340 | { | |
a002ee89 | 341 | lis3lv02d_poweron(&lis3_dev); |
cfce41a6 EP |
342 | return 0; |
343 | } | |
344 | #else | |
345 | #define lis3lv02d_suspend NULL | |
346 | #define lis3lv02d_resume NULL | |
347 | #endif | |
348 | ||
349 | /* For the HP MDPS aka 3D Driveguard */ | |
350 | static struct acpi_driver lis3lv02d_driver = { | |
351 | .name = DRIVER_NAME, | |
352 | .class = ACPI_MDPS_CLASS, | |
353 | .ids = lis3lv02d_device_ids, | |
354 | .ops = { | |
355 | .add = lis3lv02d_add, | |
356 | .remove = lis3lv02d_remove, | |
357 | .suspend = lis3lv02d_suspend, | |
358 | .resume = lis3lv02d_resume, | |
359 | } | |
360 | }; | |
361 | ||
362 | static int __init lis3lv02d_init_module(void) | |
363 | { | |
364 | int ret; | |
365 | ||
366 | if (acpi_disabled) | |
367 | return -ENODEV; | |
368 | ||
369 | ret = acpi_bus_register_driver(&lis3lv02d_driver); | |
370 | if (ret < 0) | |
371 | return ret; | |
372 | ||
373 | printk(KERN_INFO DRIVER_NAME " driver loaded.\n"); | |
374 | ||
375 | return 0; | |
376 | } | |
377 | ||
378 | static void __exit lis3lv02d_exit_module(void) | |
379 | { | |
380 | acpi_bus_unregister_driver(&lis3lv02d_driver); | |
381 | } | |
382 | ||
9e0c7978 | 383 | MODULE_DESCRIPTION("Glue between LIS3LV02Dx and HP ACPI BIOS and support for disk protection LED."); |
cfce41a6 EP |
384 | MODULE_AUTHOR("Yan Burman, Eric Piel, Pavel Machek"); |
385 | MODULE_LICENSE("GPL"); | |
386 | ||
387 | module_init(lis3lv02d_init_module); | |
388 | module_exit(lis3lv02d_exit_module); | |
389 |