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/delay.h>
31 #include <linux/wait.h>
32 #include <linux/poll.h>
33 #include <linux/freezer.h>
34 #include <linux/uaccess.h>
35 #include <linux/leds.h>
36 #include <acpi/acpi_drivers.h>
37 #include <asm/atomic.h>
38 #include "lis3lv02d.h"
40 #define DRIVER_NAME "lis3lv02d"
41 #define ACPI_MDPS_CLASS "accelerometer"
43 /* Delayed LEDs infrastructure ------------------------------------ */
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;
51 unsigned int led; /* For driver */
52 void (*set_brightness)(struct delayed_led_classdev *data, enum led_brightness value);
55 static inline void delayed_set_status_worker(struct work_struct *work)
57 struct delayed_led_classdev *data =
58 container_of(work, struct delayed_led_classdev, work);
60 data->set_brightness(data, data->new_brightness);
63 static inline void delayed_sysfs_set(struct led_classdev *led_cdev,
64 enum led_brightness brightness)
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);
72 /* HP-specific accelerometer driver ------------------------------------ */
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 */
79 MODULE_DEVICE_TABLE(acpi, lis3lv02d_device_ids);
83 * lis3lv02d_acpi_init - ACPI _INI method: initialize the device.
84 * @lis3: pointer to the device struct
86 * Returns 0 on success.
88 int lis3lv02d_acpi_init(struct lis3lv02d *lis3)
90 struct acpi_device *dev = lis3->bus_priv;
91 if (acpi_evaluate_object(dev->handle, METHOD_NAME__INI,
99 * lis3lv02d_acpi_read - ACPI ALRD method: read a register
100 * @lis3: pointer to the device struct
101 * @reg: the register to read
102 * @ret: result of the operation
104 * Returns 0 on success.
106 int lis3lv02d_acpi_read(struct lis3lv02d *lis3, int reg, u8 *ret)
108 struct acpi_device *dev = lis3->bus_priv;
109 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
110 struct acpi_object_list args = { 1, &arg0 };
111 unsigned long long lret;
114 arg0.integer.value = reg;
116 status = acpi_evaluate_integer(dev->handle, "ALRD", &args, &lret);
118 return (status != AE_OK) ? -EINVAL : 0;
122 * lis3lv02d_acpi_write - ACPI ALWR method: write to a register
123 * @lis3: pointer to the device struct
124 * @reg: the register to write to
125 * @val: the value to write
127 * Returns 0 on success.
129 int lis3lv02d_acpi_write(struct lis3lv02d *lis3, int reg, u8 val)
131 struct acpi_device *dev = lis3->bus_priv;
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 };
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;
141 if (acpi_evaluate_integer(dev->handle, "ALWR", &args, &ret) != AE_OK)
147 static int lis3lv02d_dmi_matched(const struct dmi_system_id *dmi)
149 lis3_dev.ac = *((struct axis_conversion *)dmi->driver_data);
150 printk(KERN_INFO DRIVER_NAME ": hardware type %s found.\n", dmi->ident);
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};
161 static struct axis_conversion lis3lv02d_axis_xy_swap = {2, 1, 3};
162 static struct axis_conversion lis3lv02d_axis_xy_rotated_left = {-2, 1, 3};
163 static struct axis_conversion lis3lv02d_axis_xy_rotated_left_usd = {-2, 1, -3};
164 static struct axis_conversion lis3lv02d_axis_xy_swap_inverted = {-2, -1, 3};
165 static struct axis_conversion lis3lv02d_axis_xy_rotated_right = {2, -1, 3};
166 static struct axis_conversion lis3lv02d_axis_xy_swap_yz_inverted = {2, -1, -3};
168 #define AXIS_DMI_MATCH(_ident, _name, _axis) { \
170 .callback = lis3lv02d_dmi_matched, \
172 DMI_MATCH(DMI_PRODUCT_NAME, _name) \
174 .driver_data = &lis3lv02d_axis_##_axis \
177 #define AXIS_DMI_MATCH2(_ident, _class1, _name1, \
181 .callback = lis3lv02d_dmi_matched, \
183 DMI_MATCH(DMI_##_class1, _name1), \
184 DMI_MATCH(DMI_##_class2, _name2), \
186 .driver_data = &lis3lv02d_axis_##_axis \
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),
195 AXIS_DMI_MATCH("NC2710", "HP Compaq 2710", xy_swap),
196 AXIS_DMI_MATCH("NC8510", "HP Compaq 8510", xy_swap_inverted),
197 AXIS_DMI_MATCH("HP2133", "HP 2133", xy_rotated_left),
198 AXIS_DMI_MATCH("HP2140", "HP 2140", xy_swap_inverted),
199 AXIS_DMI_MATCH("NC653x", "HP Compaq 653", xy_rotated_left_usd),
200 AXIS_DMI_MATCH("NC673x", "HP Compaq 673", xy_rotated_left_usd),
201 AXIS_DMI_MATCH("NC651xx", "HP Compaq 651", xy_rotated_right),
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),
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 * "NC2400" "HP Compaq nc2400"
221 * "NX74x0" "HP Compaq nx74"
222 * "NX6325" "HP Compaq nx6325"
223 * "NC4400" "HP Compaq nc4400"
227 static void hpled_set(struct delayed_led_classdev *led_cdev, enum led_brightness value)
229 struct acpi_device *dev = lis3_dev.bus_priv;
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 };
234 in_obj[0].type = ACPI_TYPE_INTEGER;
235 in_obj[0].integer.value = !!value;
237 acpi_evaluate_integer(dev->handle, "ALED", &args, &ret);
240 static struct delayed_led_classdev hpled_led = {
242 .name = "hp::hddprotect",
243 .default_trigger = "none",
244 .brightness_set = delayed_sysfs_set,
245 .flags = LED_CORE_SUSPENDRESUME,
247 .set_brightness = hpled_set,
251 lis3lv02d_get_resource(struct acpi_resource *resource, void *context)
253 if (resource->type == ACPI_RESOURCE_TYPE_EXTENDED_IRQ) {
254 struct acpi_resource_extended_irq *irq;
255 u32 *device_irq = context;
257 irq = &resource->data.extended_irq;
258 *device_irq = irq->interrupts[0];
264 static void lis3lv02d_enum_resources(struct acpi_device *device)
268 status = acpi_walk_resources(device->handle, METHOD_NAME__CRS,
269 lis3lv02d_get_resource, &lis3_dev.irq);
270 if (ACPI_FAILURE(status))
271 printk(KERN_DEBUG DRIVER_NAME ": Error getting resources\n");
274 static int lis3lv02d_add(struct acpi_device *device)
281 lis3_dev.bus_priv = device;
282 lis3_dev.init = lis3lv02d_acpi_init;
283 lis3_dev.read = lis3lv02d_acpi_read;
284 lis3_dev.write = lis3lv02d_acpi_write;
285 strcpy(acpi_device_name(device), DRIVER_NAME);
286 strcpy(acpi_device_class(device), ACPI_MDPS_CLASS);
287 device->driver_data = &lis3_dev;
289 /* obtain IRQ number of our device from ACPI */
290 lis3lv02d_enum_resources(device);
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");
296 lis3_dev.ac = lis3lv02d_axis_normal;
299 /* call the core layer do its init */
300 ret = lis3lv02d_init_device(&lis3_dev);
304 INIT_WORK(&hpled_led.work, delayed_set_status_worker);
305 ret = led_classdev_register(NULL, &hpled_led.led_classdev);
307 lis3lv02d_joystick_disable();
308 lis3lv02d_poweroff(&lis3_dev);
309 flush_work(&hpled_led.work);
316 static int lis3lv02d_remove(struct acpi_device *device, int type)
321 lis3lv02d_joystick_disable();
322 lis3lv02d_poweroff(&lis3_dev);
324 flush_work(&hpled_led.work);
325 led_classdev_unregister(&hpled_led.led_classdev);
327 return lis3lv02d_remove_fs(&lis3_dev);
332 static int lis3lv02d_suspend(struct acpi_device *device, pm_message_t state)
334 /* make sure the device is off when we suspend */
335 lis3lv02d_poweroff(&lis3_dev);
339 static int lis3lv02d_resume(struct acpi_device *device)
341 lis3lv02d_poweron(&lis3_dev);
345 #define lis3lv02d_suspend NULL
346 #define lis3lv02d_resume NULL
349 /* For the HP MDPS aka 3D Driveguard */
350 static struct acpi_driver lis3lv02d_driver = {
352 .class = ACPI_MDPS_CLASS,
353 .ids = lis3lv02d_device_ids,
355 .add = lis3lv02d_add,
356 .remove = lis3lv02d_remove,
357 .suspend = lis3lv02d_suspend,
358 .resume = lis3lv02d_resume,
362 static int __init lis3lv02d_init_module(void)
369 ret = acpi_bus_register_driver(&lis3lv02d_driver);
373 printk(KERN_INFO DRIVER_NAME " driver loaded.\n");
378 static void __exit lis3lv02d_exit_module(void)
380 acpi_bus_unregister_driver(&lis3lv02d_driver);
383 MODULE_DESCRIPTION("Glue between LIS3LV02Dx and HP ACPI BIOS and support for disk protection LED.");
384 MODULE_AUTHOR("Yan Burman, Eric Piel, Pavel Machek");
385 MODULE_LICENSE("GPL");
387 module_init(lis3lv02d_init_module);
388 module_exit(lis3lv02d_exit_module);