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 <linux/acpi.h>
40 #include <linux/i8042.h>
41 #include <linux/serio.h>
42 #include "../../misc/lis3lv02d/lis3lv02d.h"
44 #define DRIVER_NAME "hp_accel"
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 /* e0 25, e0 26, e0 27, e0 28 are scan codes that the accelerometer with acpi id
79 * HPQ6000 sends through the keyboard bus */
85 /* For automatic insertion of the module */
86 static const struct acpi_device_id lis3lv02d_device_ids[] = {
87 {"HPQ0004", 0}, /* HP Mobile Data Protection System PNP */
88 {"HPQ6000", 0}, /* HP Mobile Data Protection System PNP */
89 {"HPQ6007", 0}, /* HP Mobile Data Protection System PNP */
92 MODULE_DEVICE_TABLE(acpi, lis3lv02d_device_ids);
96 * lis3lv02d_acpi_init - ACPI _INI method: initialize the device.
97 * @lis3: pointer to the device struct
99 * Returns 0 on success.
101 static int lis3lv02d_acpi_init(struct lis3lv02d *lis3)
103 struct acpi_device *dev = lis3->bus_priv;
104 if (!lis3->init_required)
107 if (acpi_evaluate_object(dev->handle, METHOD_NAME__INI,
108 NULL, NULL) != AE_OK)
115 * lis3lv02d_acpi_read - ACPI ALRD method: read a register
116 * @lis3: pointer to the device struct
117 * @reg: the register to read
118 * @ret: result of the operation
120 * Returns 0 on success.
122 static int lis3lv02d_acpi_read(struct lis3lv02d *lis3, int reg, u8 *ret)
124 struct acpi_device *dev = lis3->bus_priv;
125 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
126 struct acpi_object_list args = { 1, &arg0 };
127 unsigned long long lret;
130 arg0.integer.value = reg;
132 status = acpi_evaluate_integer(dev->handle, "ALRD", &args, &lret);
133 if (ACPI_FAILURE(status))
140 * lis3lv02d_acpi_write - ACPI ALWR method: write to a register
141 * @lis3: pointer to the device struct
142 * @reg: the register to write to
143 * @val: the value to write
145 * Returns 0 on success.
147 static int lis3lv02d_acpi_write(struct lis3lv02d *lis3, int reg, u8 val)
149 struct acpi_device *dev = lis3->bus_priv;
150 unsigned long long ret; /* Not used when writting */
151 union acpi_object in_obj[2];
152 struct acpi_object_list args = { 2, in_obj };
154 in_obj[0].type = ACPI_TYPE_INTEGER;
155 in_obj[0].integer.value = reg;
156 in_obj[1].type = ACPI_TYPE_INTEGER;
157 in_obj[1].integer.value = val;
159 if (acpi_evaluate_integer(dev->handle, "ALWR", &args, &ret) != AE_OK)
165 static int lis3lv02d_dmi_matched(const struct dmi_system_id *dmi)
167 lis3_dev.ac = *((union axis_conversion *)dmi->driver_data);
168 pr_info("hardware type %s found\n", dmi->ident);
173 /* Represents, for each axis seen by userspace, the corresponding hw axis (+1).
174 * If the value is negative, the opposite of the hw value is used. */
175 #define DEFINE_CONV(name, x, y, z) \
176 static union axis_conversion lis3lv02d_axis_##name = \
177 { .as_array = { x, y, z } }
178 DEFINE_CONV(normal, 1, 2, 3);
179 DEFINE_CONV(y_inverted, 1, -2, 3);
180 DEFINE_CONV(x_inverted, -1, 2, 3);
181 DEFINE_CONV(x_inverted_usd, -1, 2, -3);
182 DEFINE_CONV(z_inverted, 1, 2, -3);
183 DEFINE_CONV(xy_swap, 2, 1, 3);
184 DEFINE_CONV(xy_rotated_left, -2, 1, 3);
185 DEFINE_CONV(xy_rotated_left_usd, -2, 1, -3);
186 DEFINE_CONV(xy_swap_inverted, -2, -1, 3);
187 DEFINE_CONV(xy_rotated_right, 2, -1, 3);
188 DEFINE_CONV(xy_swap_yz_inverted, 2, -1, -3);
190 #define AXIS_DMI_MATCH(_ident, _name, _axis) { \
192 .callback = lis3lv02d_dmi_matched, \
194 DMI_MATCH(DMI_PRODUCT_NAME, _name) \
196 .driver_data = &lis3lv02d_axis_##_axis \
199 #define AXIS_DMI_MATCH2(_ident, _class1, _name1, \
203 .callback = lis3lv02d_dmi_matched, \
205 DMI_MATCH(DMI_##_class1, _name1), \
206 DMI_MATCH(DMI_##_class2, _name2), \
208 .driver_data = &lis3lv02d_axis_##_axis \
210 static const struct dmi_system_id lis3lv02d_dmi_ids[] = {
211 /* product names are truncated to match all kinds of a same model */
212 AXIS_DMI_MATCH("NC64x0", "HP Compaq nc64", x_inverted),
213 AXIS_DMI_MATCH("NC84x0", "HP Compaq nc84", z_inverted),
214 AXIS_DMI_MATCH("NX9420", "HP Compaq nx9420", x_inverted),
215 AXIS_DMI_MATCH("NW9440", "HP Compaq nw9440", x_inverted),
216 AXIS_DMI_MATCH("NC2510", "HP Compaq 2510", y_inverted),
217 AXIS_DMI_MATCH("NC2710", "HP Compaq 2710", xy_swap),
218 AXIS_DMI_MATCH("NC8510", "HP Compaq 8510", xy_swap_inverted),
219 AXIS_DMI_MATCH("HP2133", "HP 2133", xy_rotated_left),
220 AXIS_DMI_MATCH("HP2140", "HP 2140", xy_swap_inverted),
221 AXIS_DMI_MATCH("NC653x", "HP Compaq 653", xy_rotated_left_usd),
222 AXIS_DMI_MATCH("NC6730b", "HP Compaq 6730b", xy_rotated_left_usd),
223 AXIS_DMI_MATCH("NC6730s", "HP Compaq 6730s", xy_swap),
224 AXIS_DMI_MATCH("NC651xx", "HP Compaq 651", xy_rotated_right),
225 AXIS_DMI_MATCH("NC6710x", "HP Compaq 6710", xy_swap_yz_inverted),
226 AXIS_DMI_MATCH("NC6715x", "HP Compaq 6715", y_inverted),
227 AXIS_DMI_MATCH("NC693xx", "HP EliteBook 693", xy_rotated_right),
228 AXIS_DMI_MATCH("NC693xx", "HP EliteBook 853", xy_swap),
229 AXIS_DMI_MATCH("NC854xx", "HP EliteBook 854", y_inverted),
230 AXIS_DMI_MATCH("NC273xx", "HP EliteBook 273", y_inverted),
231 /* Intel-based HP Pavilion dv5 */
232 AXIS_DMI_MATCH2("HPDV5_I",
233 PRODUCT_NAME, "HP Pavilion dv5",
236 /* AMD-based HP Pavilion dv5 */
237 AXIS_DMI_MATCH2("HPDV5_A",
238 PRODUCT_NAME, "HP Pavilion dv5",
241 AXIS_DMI_MATCH("DV7", "HP Pavilion dv7", x_inverted),
242 AXIS_DMI_MATCH("HP8710", "HP Compaq 8710", y_inverted),
243 AXIS_DMI_MATCH("HDX18", "HP HDX 18", x_inverted),
244 AXIS_DMI_MATCH("HPB432x", "HP ProBook 432", xy_rotated_left),
245 AXIS_DMI_MATCH("HPB440G3", "HP ProBook 440 G3", x_inverted_usd),
246 AXIS_DMI_MATCH("HPB440G4", "HP ProBook 440 G4", x_inverted),
247 AXIS_DMI_MATCH("HPB442x", "HP ProBook 442", xy_rotated_left),
248 AXIS_DMI_MATCH("HPB452x", "HP ProBook 452", y_inverted),
249 AXIS_DMI_MATCH("HPB522x", "HP ProBook 522", xy_swap),
250 AXIS_DMI_MATCH("HPB532x", "HP ProBook 532", y_inverted),
251 AXIS_DMI_MATCH("HPB655x", "HP ProBook 655", xy_swap_inverted),
252 AXIS_DMI_MATCH("Mini510x", "HP Mini 510", xy_rotated_left_usd),
253 AXIS_DMI_MATCH("HPB63xx", "HP ProBook 63", xy_swap),
254 AXIS_DMI_MATCH("HPB64xx", "HP ProBook 64", xy_swap),
255 AXIS_DMI_MATCH("HPB64xx", "HP EliteBook 84", xy_swap),
256 AXIS_DMI_MATCH("HPB65xx", "HP ProBook 65", x_inverted),
257 AXIS_DMI_MATCH("HPZBook15", "HP ZBook 15", x_inverted),
259 /* Laptop models without axis info (yet):
260 * "NC6910" "HP Compaq 6910"
261 * "NC2400" "HP Compaq nc2400"
262 * "NX74x0" "HP Compaq nx74"
263 * "NX6325" "HP Compaq nx6325"
264 * "NC4400" "HP Compaq nc4400"
268 static void hpled_set(struct delayed_led_classdev *led_cdev, enum led_brightness value)
270 struct acpi_device *dev = lis3_dev.bus_priv;
271 unsigned long long ret; /* Not used when writing */
272 union acpi_object in_obj[1];
273 struct acpi_object_list args = { 1, in_obj };
275 in_obj[0].type = ACPI_TYPE_INTEGER;
276 in_obj[0].integer.value = !!value;
278 acpi_evaluate_integer(dev->handle, "ALED", &args, &ret);
281 static struct delayed_led_classdev hpled_led = {
283 .name = "hp::hddprotect",
284 .default_trigger = "none",
285 .brightness_set = delayed_sysfs_set,
286 .flags = LED_CORE_SUSPENDRESUME,
288 .set_brightness = hpled_set,
292 lis3lv02d_get_resource(struct acpi_resource *resource, void *context)
294 if (resource->type == ACPI_RESOURCE_TYPE_EXTENDED_IRQ) {
295 struct acpi_resource_extended_irq *irq;
296 u32 *device_irq = context;
298 irq = &resource->data.extended_irq;
299 *device_irq = irq->interrupts[0];
305 static void lis3lv02d_enum_resources(struct acpi_device *device)
309 status = acpi_walk_resources(device->handle, METHOD_NAME__CRS,
310 lis3lv02d_get_resource, &lis3_dev.irq);
311 if (ACPI_FAILURE(status))
312 printk(KERN_DEBUG DRIVER_NAME ": Error getting resources\n");
315 static bool hp_accel_i8042_filter(unsigned char data, unsigned char str,
318 static bool extended;
320 if (str & I8042_STR_AUXDATA)
326 } else if (unlikely(extended)) {
336 serio_interrupt(port, 0xe0, 0);
344 static int lis3lv02d_add(struct acpi_device *device)
351 lis3_dev.bus_priv = device;
352 lis3_dev.init = lis3lv02d_acpi_init;
353 lis3_dev.read = lis3lv02d_acpi_read;
354 lis3_dev.write = lis3lv02d_acpi_write;
355 strcpy(acpi_device_name(device), DRIVER_NAME);
356 strcpy(acpi_device_class(device), ACPI_MDPS_CLASS);
357 device->driver_data = &lis3_dev;
359 /* obtain IRQ number of our device from ACPI */
360 lis3lv02d_enum_resources(device);
362 /* If possible use a "standard" axes order */
363 if (lis3_dev.ac.x && lis3_dev.ac.y && lis3_dev.ac.z) {
364 pr_info("Using custom axes %d,%d,%d\n",
365 lis3_dev.ac.x, lis3_dev.ac.y, lis3_dev.ac.z);
366 } else if (dmi_check_system(lis3lv02d_dmi_ids) == 0) {
367 pr_info("laptop model unknown, using default axes configuration\n");
368 lis3_dev.ac = lis3lv02d_axis_normal;
371 /* call the core layer do its init */
372 lis3_dev.init_required = true;
373 ret = lis3lv02d_init_device(&lis3_dev);
377 /* filter to remove HPQ6000 accelerometer data
378 * from keyboard bus stream */
379 if (strstr(dev_name(&device->dev), "HPQ6000"))
380 i8042_install_filter(hp_accel_i8042_filter);
382 INIT_WORK(&hpled_led.work, delayed_set_status_worker);
383 ret = led_classdev_register(NULL, &hpled_led.led_classdev);
385 i8042_remove_filter(hp_accel_i8042_filter);
386 lis3lv02d_joystick_disable(&lis3_dev);
387 lis3lv02d_poweroff(&lis3_dev);
388 flush_work(&hpled_led.work);
389 lis3lv02d_remove_fs(&lis3_dev);
396 static int lis3lv02d_remove(struct acpi_device *device)
401 i8042_remove_filter(hp_accel_i8042_filter);
402 lis3lv02d_joystick_disable(&lis3_dev);
403 lis3lv02d_poweroff(&lis3_dev);
405 led_classdev_unregister(&hpled_led.led_classdev);
406 flush_work(&hpled_led.work);
408 return lis3lv02d_remove_fs(&lis3_dev);
412 #ifdef CONFIG_PM_SLEEP
413 static int lis3lv02d_suspend(struct device *dev)
415 /* make sure the device is off when we suspend */
416 lis3lv02d_poweroff(&lis3_dev);
420 static int lis3lv02d_resume(struct device *dev)
422 lis3_dev.init_required = false;
423 lis3lv02d_poweron(&lis3_dev);
427 static int lis3lv02d_restore(struct device *dev)
429 lis3_dev.init_required = true;
430 lis3lv02d_poweron(&lis3_dev);
434 static const struct dev_pm_ops hp_accel_pm = {
435 .suspend = lis3lv02d_suspend,
436 .resume = lis3lv02d_resume,
437 .freeze = lis3lv02d_suspend,
438 .thaw = lis3lv02d_resume,
439 .poweroff = lis3lv02d_suspend,
440 .restore = lis3lv02d_restore,
443 #define HP_ACCEL_PM (&hp_accel_pm)
445 #define HP_ACCEL_PM NULL
448 /* For the HP MDPS aka 3D Driveguard */
449 static struct acpi_driver lis3lv02d_driver = {
451 .class = ACPI_MDPS_CLASS,
452 .ids = lis3lv02d_device_ids,
454 .add = lis3lv02d_add,
455 .remove = lis3lv02d_remove,
457 .drv.pm = HP_ACCEL_PM,
459 module_acpi_driver(lis3lv02d_driver);
461 MODULE_DESCRIPTION("Glue between LIS3LV02Dx and HP ACPI BIOS and support for disk protection LED.");
462 MODULE_AUTHOR("Yan Burman, Eric Piel, Pavel Machek");
463 MODULE_LICENSE("GPL");