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 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
25 #include <linux/kernel.h>
26 #include <linux/init.h>
27 #include <linux/dmi.h>
28 #include <linux/module.h>
29 #include <linux/types.h>
30 #include <linux/platform_device.h>
31 #include <linux/interrupt.h>
32 #include <linux/delay.h>
33 #include <linux/wait.h>
34 #include <linux/poll.h>
35 #include <linux/freezer.h>
36 #include <linux/uaccess.h>
37 #include <linux/leds.h>
38 #include <linux/atomic.h>
39 #include <acpi/acpi_drivers.h>
40 #include "../../misc/lis3lv02d/lis3lv02d.h"
42 #define DRIVER_NAME "hp_accel"
43 #define ACPI_MDPS_CLASS "accelerometer"
45 /* Delayed LEDs infrastructure ------------------------------------ */
47 /* Special LED class that can defer work */
48 struct delayed_led_classdev {
49 struct led_classdev led_classdev;
50 struct work_struct work;
51 enum led_brightness new_brightness;
53 unsigned int led; /* For driver */
54 void (*set_brightness)(struct delayed_led_classdev *data, enum led_brightness value);
57 static inline void delayed_set_status_worker(struct work_struct *work)
59 struct delayed_led_classdev *data =
60 container_of(work, struct delayed_led_classdev, work);
62 data->set_brightness(data, data->new_brightness);
65 static inline void delayed_sysfs_set(struct led_classdev *led_cdev,
66 enum led_brightness brightness)
68 struct delayed_led_classdev *data = container_of(led_cdev,
69 struct delayed_led_classdev, led_classdev);
70 data->new_brightness = brightness;
71 schedule_work(&data->work);
74 /* HP-specific accelerometer driver ------------------------------------ */
76 /* For automatic insertion of the module */
77 static struct acpi_device_id lis3lv02d_device_ids[] = {
78 {"HPQ0004", 0}, /* HP Mobile Data Protection System PNP */
79 {"HPQ6000", 0}, /* HP Mobile Data Protection System PNP */
80 {"HPQ6007", 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 = *((union axis_conversion *)dmi->driver_data);
154 pr_info("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 #define DEFINE_CONV(name, x, y, z) \
162 static union axis_conversion lis3lv02d_axis_##name = \
163 { .as_array = { x, y, z } }
164 DEFINE_CONV(normal, 1, 2, 3);
165 DEFINE_CONV(y_inverted, 1, -2, 3);
166 DEFINE_CONV(x_inverted, -1, 2, 3);
167 DEFINE_CONV(z_inverted, 1, 2, -3);
168 DEFINE_CONV(xy_swap, 2, 1, 3);
169 DEFINE_CONV(xy_rotated_left, -2, 1, 3);
170 DEFINE_CONV(xy_rotated_left_usd, -2, 1, -3);
171 DEFINE_CONV(xy_swap_inverted, -2, -1, 3);
172 DEFINE_CONV(xy_rotated_right, 2, -1, 3);
173 DEFINE_CONV(xy_swap_yz_inverted, 2, -1, -3);
175 #define AXIS_DMI_MATCH(_ident, _name, _axis) { \
177 .callback = lis3lv02d_dmi_matched, \
179 DMI_MATCH(DMI_PRODUCT_NAME, _name) \
181 .driver_data = &lis3lv02d_axis_##_axis \
184 #define AXIS_DMI_MATCH2(_ident, _class1, _name1, \
188 .callback = lis3lv02d_dmi_matched, \
190 DMI_MATCH(DMI_##_class1, _name1), \
191 DMI_MATCH(DMI_##_class2, _name2), \
193 .driver_data = &lis3lv02d_axis_##_axis \
195 static struct dmi_system_id lis3lv02d_dmi_ids[] = {
196 /* product names are truncated to match all kinds of a same model */
197 AXIS_DMI_MATCH("NC64x0", "HP Compaq nc64", x_inverted),
198 AXIS_DMI_MATCH("NC84x0", "HP Compaq nc84", z_inverted),
199 AXIS_DMI_MATCH("NX9420", "HP Compaq nx9420", x_inverted),
200 AXIS_DMI_MATCH("NW9440", "HP Compaq nw9440", x_inverted),
201 AXIS_DMI_MATCH("NC2510", "HP Compaq 2510", y_inverted),
202 AXIS_DMI_MATCH("NC2710", "HP Compaq 2710", xy_swap),
203 AXIS_DMI_MATCH("NC8510", "HP Compaq 8510", xy_swap_inverted),
204 AXIS_DMI_MATCH("HP2133", "HP 2133", xy_rotated_left),
205 AXIS_DMI_MATCH("HP2140", "HP 2140", xy_swap_inverted),
206 AXIS_DMI_MATCH("NC653x", "HP Compaq 653", xy_rotated_left_usd),
207 AXIS_DMI_MATCH("NC6730b", "HP Compaq 6730b", xy_rotated_left_usd),
208 AXIS_DMI_MATCH("NC6730s", "HP Compaq 6730s", xy_swap),
209 AXIS_DMI_MATCH("NC651xx", "HP Compaq 651", xy_rotated_right),
210 AXIS_DMI_MATCH("NC6710x", "HP Compaq 6710", xy_swap_yz_inverted),
211 AXIS_DMI_MATCH("NC6715x", "HP Compaq 6715", y_inverted),
212 AXIS_DMI_MATCH("NC693xx", "HP EliteBook 693", xy_rotated_right),
213 AXIS_DMI_MATCH("NC693xx", "HP EliteBook 853", xy_swap),
214 AXIS_DMI_MATCH("NC854xx", "HP EliteBook 854", y_inverted),
215 AXIS_DMI_MATCH("NC273xx", "HP EliteBook 273", y_inverted),
216 /* Intel-based HP Pavilion dv5 */
217 AXIS_DMI_MATCH2("HPDV5_I",
218 PRODUCT_NAME, "HP Pavilion dv5",
221 /* AMD-based HP Pavilion dv5 */
222 AXIS_DMI_MATCH2("HPDV5_A",
223 PRODUCT_NAME, "HP Pavilion dv5",
226 AXIS_DMI_MATCH("DV7", "HP Pavilion dv7", x_inverted),
227 AXIS_DMI_MATCH("HP8710", "HP Compaq 8710", y_inverted),
228 AXIS_DMI_MATCH("HDX18", "HP HDX 18", x_inverted),
229 AXIS_DMI_MATCH("HPB432x", "HP ProBook 432", xy_rotated_left),
230 AXIS_DMI_MATCH("HPB442x", "HP ProBook 442", xy_rotated_left),
231 AXIS_DMI_MATCH("HPB452x", "HP ProBook 452", y_inverted),
232 AXIS_DMI_MATCH("HPB522x", "HP ProBook 522", xy_swap),
233 AXIS_DMI_MATCH("HPB532x", "HP ProBook 532", y_inverted),
234 AXIS_DMI_MATCH("HPB655x", "HP ProBook 655", xy_swap_inverted),
235 AXIS_DMI_MATCH("Mini510x", "HP Mini 510", xy_rotated_left_usd),
236 AXIS_DMI_MATCH("HPB63xx", "HP ProBook 63", xy_swap),
237 AXIS_DMI_MATCH("HPB64xx", "HP ProBook 64", xy_swap),
238 AXIS_DMI_MATCH("HPB64xx", "HP EliteBook 84", xy_swap),
239 AXIS_DMI_MATCH("HPB65xx", "HP ProBook 65", x_inverted),
240 AXIS_DMI_MATCH("HPZBook15", "HP ZBook 15", x_inverted),
242 /* Laptop models without axis info (yet):
243 * "NC6910" "HP Compaq 6910"
244 * "NC2400" "HP Compaq nc2400"
245 * "NX74x0" "HP Compaq nx74"
246 * "NX6325" "HP Compaq nx6325"
247 * "NC4400" "HP Compaq nc4400"
251 static void hpled_set(struct delayed_led_classdev *led_cdev, enum led_brightness value)
253 struct acpi_device *dev = lis3_dev.bus_priv;
254 unsigned long long ret; /* Not used when writing */
255 union acpi_object in_obj[1];
256 struct acpi_object_list args = { 1, in_obj };
258 in_obj[0].type = ACPI_TYPE_INTEGER;
259 in_obj[0].integer.value = !!value;
261 acpi_evaluate_integer(dev->handle, "ALED", &args, &ret);
264 static struct delayed_led_classdev hpled_led = {
266 .name = "hp::hddprotect",
267 .default_trigger = "none",
268 .brightness_set = delayed_sysfs_set,
269 .flags = LED_CORE_SUSPENDRESUME,
271 .set_brightness = hpled_set,
275 lis3lv02d_get_resource(struct acpi_resource *resource, void *context)
277 if (resource->type == ACPI_RESOURCE_TYPE_EXTENDED_IRQ) {
278 struct acpi_resource_extended_irq *irq;
279 u32 *device_irq = context;
281 irq = &resource->data.extended_irq;
282 *device_irq = irq->interrupts[0];
288 static void lis3lv02d_enum_resources(struct acpi_device *device)
292 status = acpi_walk_resources(device->handle, METHOD_NAME__CRS,
293 lis3lv02d_get_resource, &lis3_dev.irq);
294 if (ACPI_FAILURE(status))
295 printk(KERN_DEBUG DRIVER_NAME ": Error getting resources\n");
298 static int lis3lv02d_add(struct acpi_device *device)
305 lis3_dev.bus_priv = device;
306 lis3_dev.init = lis3lv02d_acpi_init;
307 lis3_dev.read = lis3lv02d_acpi_read;
308 lis3_dev.write = lis3lv02d_acpi_write;
309 strcpy(acpi_device_name(device), DRIVER_NAME);
310 strcpy(acpi_device_class(device), ACPI_MDPS_CLASS);
311 device->driver_data = &lis3_dev;
313 /* obtain IRQ number of our device from ACPI */
314 lis3lv02d_enum_resources(device);
316 /* If possible use a "standard" axes order */
317 if (lis3_dev.ac.x && lis3_dev.ac.y && lis3_dev.ac.z) {
318 pr_info("Using custom axes %d,%d,%d\n",
319 lis3_dev.ac.x, lis3_dev.ac.y, lis3_dev.ac.z);
320 } else if (dmi_check_system(lis3lv02d_dmi_ids) == 0) {
321 pr_info("laptop model unknown, using default axes configuration\n");
322 lis3_dev.ac = lis3lv02d_axis_normal;
325 /* call the core layer do its init */
326 ret = lis3lv02d_init_device(&lis3_dev);
330 INIT_WORK(&hpled_led.work, delayed_set_status_worker);
331 ret = led_classdev_register(NULL, &hpled_led.led_classdev);
333 lis3lv02d_joystick_disable(&lis3_dev);
334 lis3lv02d_poweroff(&lis3_dev);
335 flush_work(&hpled_led.work);
342 static int lis3lv02d_remove(struct acpi_device *device, int type)
347 lis3lv02d_joystick_disable(&lis3_dev);
348 lis3lv02d_poweroff(&lis3_dev);
350 led_classdev_unregister(&hpled_led.led_classdev);
351 flush_work(&hpled_led.work);
353 return lis3lv02d_remove_fs(&lis3_dev);
358 static int lis3lv02d_suspend(struct acpi_device *device, pm_message_t state)
360 /* make sure the device is off when we suspend */
361 lis3lv02d_poweroff(&lis3_dev);
365 static int lis3lv02d_resume(struct acpi_device *device)
367 lis3lv02d_poweron(&lis3_dev);
371 #define lis3lv02d_suspend NULL
372 #define lis3lv02d_resume NULL
375 /* For the HP MDPS aka 3D Driveguard */
376 static struct acpi_driver lis3lv02d_driver = {
378 .class = ACPI_MDPS_CLASS,
379 .ids = lis3lv02d_device_ids,
381 .add = lis3lv02d_add,
382 .remove = lis3lv02d_remove,
383 .suspend = lis3lv02d_suspend,
384 .resume = lis3lv02d_resume,
388 static int __init lis3lv02d_init_module(void)
395 ret = acpi_bus_register_driver(&lis3lv02d_driver);
399 pr_info("driver loaded\n");
404 static void __exit lis3lv02d_exit_module(void)
406 acpi_bus_unregister_driver(&lis3lv02d_driver);
409 MODULE_DESCRIPTION("Glue between LIS3LV02Dx and HP ACPI BIOS and support for disk protection LED.");
410 MODULE_AUTHOR("Yan Burman, Eric Piel, Pavel Machek");
411 MODULE_LICENSE("GPL");
413 module_init(lis3lv02d_init_module);
414 module_exit(lis3lv02d_exit_module);