2 * hp_accel.c - Interface between LIS3LV02DL driver and HP ACPI BIOS
4 * Copyright (C) 2007-2008 Yan Burman
5 * Copyright (C) 2008 Eric Piel
6 * Copyright (C) 2008-2009 Pavel Machek
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.
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.
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
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>
39 #include <linux/leds.h>
40 #include <acpi/acpi_drivers.h>
41 #include <asm/atomic.h>
42 #include "lis3lv02d.h"
44 #define DRIVER_NAME "lis3lv02d"
45 #define ACPI_MDPS_CLASS "accelerometer"
47 /* Delayed LEDs infrastructure ------------------------------------ */
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;
55 unsigned int led; /* For driver */
56 void (*set_brightness)(struct delayed_led_classdev *data, enum led_brightness value);
59 static inline void delayed_set_status_worker(struct work_struct *work)
61 struct delayed_led_classdev *data =
62 container_of(work, struct delayed_led_classdev, work);
64 data->set_brightness(data, data->new_brightness);
67 static inline void delayed_sysfs_set(struct led_classdev *led_cdev,
68 enum led_brightness brightness)
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);
76 /* HP-specific accelerometer driver ------------------------------------ */
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 */
83 MODULE_DEVICE_TABLE(acpi, lis3lv02d_device_ids);
87 * lis3lv02d_acpi_init - ACPI _INI method: initialize the device.
88 * @lis3: pointer to the device struct
90 * Returns 0 on success.
92 int lis3lv02d_acpi_init(struct lis3lv02d *lis3)
94 struct acpi_device *dev = lis3->bus_priv;
95 if (acpi_evaluate_object(dev->handle, METHOD_NAME__INI,
103 * lis3lv02d_acpi_read - ACPI ALRD method: read a register
104 * @lis3: pointer to the device struct
105 * @reg: the register to read
106 * @ret: result of the operation
108 * Returns 0 on success.
110 int lis3lv02d_acpi_read(struct lis3lv02d *lis3, int reg, u8 *ret)
112 struct acpi_device *dev = lis3->bus_priv;
113 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
114 struct acpi_object_list args = { 1, &arg0 };
115 unsigned long long lret;
118 arg0.integer.value = reg;
120 status = acpi_evaluate_integer(dev->handle, "ALRD", &args, &lret);
122 return (status != AE_OK) ? -EINVAL : 0;
126 * lis3lv02d_acpi_write - ACPI ALWR method: write to a register
127 * @lis3: pointer to the device struct
128 * @reg: the register to write to
129 * @val: the value to write
131 * Returns 0 on success.
133 int lis3lv02d_acpi_write(struct lis3lv02d *lis3, int reg, u8 val)
135 struct acpi_device *dev = lis3->bus_priv;
136 unsigned long long ret; /* Not used when writting */
137 union acpi_object in_obj[2];
138 struct acpi_object_list args = { 2, in_obj };
140 in_obj[0].type = ACPI_TYPE_INTEGER;
141 in_obj[0].integer.value = reg;
142 in_obj[1].type = ACPI_TYPE_INTEGER;
143 in_obj[1].integer.value = val;
145 if (acpi_evaluate_integer(dev->handle, "ALWR", &args, &ret) != AE_OK)
151 static int lis3lv02d_dmi_matched(const struct dmi_system_id *dmi)
153 lis3_dev.ac = *((struct axis_conversion *)dmi->driver_data);
154 printk(KERN_INFO DRIVER_NAME ": hardware type %s found.\n", dmi->ident);
159 /* Represents, for each axis seen by userspace, the corresponding hw axis (+1).
160 * If the value is negative, the opposite of the hw value is used. */
161 static struct axis_conversion lis3lv02d_axis_normal = {1, 2, 3};
162 static struct axis_conversion lis3lv02d_axis_y_inverted = {1, -2, 3};
163 static struct axis_conversion lis3lv02d_axis_x_inverted = {-1, 2, 3};
164 static struct axis_conversion lis3lv02d_axis_z_inverted = {1, 2, -3};
165 static struct axis_conversion lis3lv02d_axis_xy_rotated_left = {-2, 1, 3};
166 static struct axis_conversion lis3lv02d_axis_xy_rotated_left_usd = {-2, 1, -3};
167 static struct axis_conversion lis3lv02d_axis_xy_swap_inverted = {-2, -1, 3};
168 static struct axis_conversion lis3lv02d_axis_xy_rotated_right = {2, -1, 3};
169 static struct axis_conversion lis3lv02d_axis_xy_swap_yz_inverted = {2, -1, -3};
171 #define AXIS_DMI_MATCH(_ident, _name, _axis) { \
173 .callback = lis3lv02d_dmi_matched, \
175 DMI_MATCH(DMI_PRODUCT_NAME, _name) \
177 .driver_data = &lis3lv02d_axis_##_axis \
180 #define AXIS_DMI_MATCH2(_ident, _class1, _name1, \
184 .callback = lis3lv02d_dmi_matched, \
186 DMI_MATCH(DMI_##_class1, _name1), \
187 DMI_MATCH(DMI_##_class2, _name2), \
189 .driver_data = &lis3lv02d_axis_##_axis \
191 static struct dmi_system_id lis3lv02d_dmi_ids[] = {
192 /* product names are truncated to match all kinds of a same model */
193 AXIS_DMI_MATCH("NC64x0", "HP Compaq nc64", x_inverted),
194 AXIS_DMI_MATCH("NC84x0", "HP Compaq nc84", z_inverted),
195 AXIS_DMI_MATCH("NX9420", "HP Compaq nx9420", x_inverted),
196 AXIS_DMI_MATCH("NW9440", "HP Compaq nw9440", x_inverted),
197 AXIS_DMI_MATCH("NC2510", "HP Compaq 2510", y_inverted),
198 AXIS_DMI_MATCH("NC8510", "HP Compaq 8510", xy_swap_inverted),
199 AXIS_DMI_MATCH("HP2133", "HP 2133", xy_rotated_left),
200 AXIS_DMI_MATCH("HP2140", "HP 2140", xy_swap_inverted),
201 AXIS_DMI_MATCH("NC653x", "HP Compaq 653", xy_rotated_left_usd),
202 AXIS_DMI_MATCH("NC673x", "HP Compaq 673", xy_rotated_left_usd),
203 AXIS_DMI_MATCH("NC651xx", "HP Compaq 651", xy_rotated_right),
204 AXIS_DMI_MATCH("NC671xx", "HP Compaq 671", xy_swap_yz_inverted),
205 /* Intel-based HP Pavilion dv5 */
206 AXIS_DMI_MATCH2("HPDV5_I",
207 PRODUCT_NAME, "HP Pavilion dv5",
210 /* AMD-based HP Pavilion dv5 */
211 AXIS_DMI_MATCH2("HPDV5_A",
212 PRODUCT_NAME, "HP Pavilion dv5",
215 AXIS_DMI_MATCH("DV7", "HP Pavilion dv7", x_inverted),
216 AXIS_DMI_MATCH("HP8710", "HP Compaq 8710", y_inverted),
218 /* Laptop models without axis info (yet):
219 * "NC6910" "HP Compaq 6910"
220 * HP Compaq 8710x Notebook PC / Mobile Workstation
221 * "NC2400" "HP Compaq nc2400"
222 * "NX74x0" "HP Compaq nx74"
223 * "NX6325" "HP Compaq nx6325"
224 * "NC4400" "HP Compaq nc4400"
228 static void hpled_set(struct delayed_led_classdev *led_cdev, enum led_brightness value)
230 struct acpi_device *dev = lis3_dev.bus_priv;
231 unsigned long long ret; /* Not used when writing */
232 union acpi_object in_obj[1];
233 struct acpi_object_list args = { 1, in_obj };
235 in_obj[0].type = ACPI_TYPE_INTEGER;
236 in_obj[0].integer.value = !!value;
238 acpi_evaluate_integer(dev->handle, "ALED", &args, &ret);
241 static struct delayed_led_classdev hpled_led = {
243 .name = "hp::hddprotect",
244 .default_trigger = "none",
245 .brightness_set = delayed_sysfs_set,
246 .flags = LED_CORE_SUSPENDRESUME,
248 .set_brightness = hpled_set,
252 lis3lv02d_get_resource(struct acpi_resource *resource, void *context)
254 if (resource->type == ACPI_RESOURCE_TYPE_EXTENDED_IRQ) {
255 struct acpi_resource_extended_irq *irq;
256 u32 *device_irq = context;
258 irq = &resource->data.extended_irq;
259 *device_irq = irq->interrupts[0];
265 static void lis3lv02d_enum_resources(struct acpi_device *device)
269 status = acpi_walk_resources(device->handle, METHOD_NAME__CRS,
270 lis3lv02d_get_resource, &lis3_dev.irq);
271 if (ACPI_FAILURE(status))
272 printk(KERN_DEBUG DRIVER_NAME ": Error getting resources\n");
275 static int lis3lv02d_add(struct acpi_device *device)
282 lis3_dev.bus_priv = device;
283 lis3_dev.init = lis3lv02d_acpi_init;
284 lis3_dev.read = lis3lv02d_acpi_read;
285 lis3_dev.write = lis3lv02d_acpi_write;
286 strcpy(acpi_device_name(device), DRIVER_NAME);
287 strcpy(acpi_device_class(device), ACPI_MDPS_CLASS);
288 device->driver_data = &lis3_dev;
290 /* obtain IRQ number of our device from ACPI */
291 lis3lv02d_enum_resources(device);
293 /* If possible use a "standard" axes order */
294 if (dmi_check_system(lis3lv02d_dmi_ids) == 0) {
295 printk(KERN_INFO DRIVER_NAME ": laptop model unknown, "
296 "using default axes configuration\n");
297 lis3_dev.ac = lis3lv02d_axis_normal;
300 /* call the core layer do its init */
301 ret = lis3lv02d_init_device(&lis3_dev);
305 INIT_WORK(&hpled_led.work, delayed_set_status_worker);
306 ret = led_classdev_register(NULL, &hpled_led.led_classdev);
308 lis3lv02d_joystick_disable();
309 lis3lv02d_poweroff(&lis3_dev);
310 flush_work(&hpled_led.work);
317 static int lis3lv02d_remove(struct acpi_device *device, int type)
322 lis3lv02d_joystick_disable();
323 lis3lv02d_poweroff(&lis3_dev);
325 flush_work(&hpled_led.work);
326 led_classdev_unregister(&hpled_led.led_classdev);
328 return lis3lv02d_remove_fs();
333 static int lis3lv02d_suspend(struct acpi_device *device, pm_message_t state)
335 /* make sure the device is off when we suspend */
336 lis3lv02d_poweroff(&lis3_dev);
340 static int lis3lv02d_resume(struct acpi_device *device)
342 /* put back the device in the right state (ACPI might turn it on) */
343 mutex_lock(&lis3_dev.lock);
344 if (lis3_dev.usage > 0)
345 lis3lv02d_poweron(&lis3_dev);
347 lis3lv02d_poweroff(&lis3_dev);
348 mutex_unlock(&lis3_dev.lock);
352 #define lis3lv02d_suspend NULL
353 #define lis3lv02d_resume NULL
356 /* For the HP MDPS aka 3D Driveguard */
357 static struct acpi_driver lis3lv02d_driver = {
359 .class = ACPI_MDPS_CLASS,
360 .ids = lis3lv02d_device_ids,
362 .add = lis3lv02d_add,
363 .remove = lis3lv02d_remove,
364 .suspend = lis3lv02d_suspend,
365 .resume = lis3lv02d_resume,
369 static int __init lis3lv02d_init_module(void)
376 ret = acpi_bus_register_driver(&lis3lv02d_driver);
380 printk(KERN_INFO DRIVER_NAME " driver loaded.\n");
385 static void __exit lis3lv02d_exit_module(void)
387 acpi_bus_unregister_driver(&lis3lv02d_driver);
390 MODULE_DESCRIPTION("Glue between LIS3LV02Dx and HP ACPI BIOS and support for disk protection LED.");
391 MODULE_AUTHOR("Yan Burman, Eric Piel, Pavel Machek");
392 MODULE_LICENSE("GPL");
394 module_init(lis3lv02d_init_module);
395 module_exit(lis3lv02d_exit_module);