1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * hp_accel.c - Interface between LIS3LV02DL driver and HP ACPI BIOS
5 * Copyright (C) 2007-2008 Yan Burman
6 * Copyright (C) 2008 Eric Piel
7 * Copyright (C) 2008-2009 Pavel Machek
10 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
12 #include <linux/kernel.h>
13 #include <linux/init.h>
14 #include <linux/dmi.h>
15 #include <linux/module.h>
16 #include <linux/types.h>
17 #include <linux/platform_device.h>
18 #include <linux/interrupt.h>
19 #include <linux/delay.h>
20 #include <linux/wait.h>
21 #include <linux/poll.h>
22 #include <linux/freezer.h>
23 #include <linux/uaccess.h>
24 #include <linux/leds.h>
25 #include <linux/atomic.h>
26 #include <linux/acpi.h>
27 #include <linux/i8042.h>
28 #include <linux/serio.h>
29 #include "../../misc/lis3lv02d/lis3lv02d.h"
31 #define DRIVER_NAME "hp_accel"
32 #define ACPI_MDPS_CLASS "accelerometer"
34 /* Delayed LEDs infrastructure ------------------------------------ */
36 /* Special LED class that can defer work */
37 struct delayed_led_classdev {
38 struct led_classdev led_classdev;
39 struct work_struct work;
40 enum led_brightness new_brightness;
42 unsigned int led; /* For driver */
43 void (*set_brightness)(struct delayed_led_classdev *data, enum led_brightness value);
46 static inline void delayed_set_status_worker(struct work_struct *work)
48 struct delayed_led_classdev *data =
49 container_of(work, struct delayed_led_classdev, work);
51 data->set_brightness(data, data->new_brightness);
54 static inline void delayed_sysfs_set(struct led_classdev *led_cdev,
55 enum led_brightness brightness)
57 struct delayed_led_classdev *data = container_of(led_cdev,
58 struct delayed_led_classdev, led_classdev);
59 data->new_brightness = brightness;
60 schedule_work(&data->work);
63 /* HP-specific accelerometer driver ------------------------------------ */
65 /* e0 25, e0 26, e0 27, e0 28 are scan codes that the accelerometer with acpi id
66 * HPQ6000 sends through the keyboard bus */
72 /* For automatic insertion of the module */
73 static const struct acpi_device_id lis3lv02d_device_ids[] = {
74 {"HPQ0004", 0}, /* HP Mobile Data Protection System PNP */
75 {"HPQ6000", 0}, /* HP Mobile Data Protection System PNP */
76 {"HPQ6007", 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 static 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 static 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);
117 if (ACPI_FAILURE(status))
124 * lis3lv02d_acpi_write - ACPI ALWR method: write to a register
125 * @lis3: pointer to the device struct
126 * @reg: the register to write to
127 * @val: the value to write
129 * Returns 0 on success.
131 static int lis3lv02d_acpi_write(struct lis3lv02d *lis3, int reg, u8 val)
133 struct acpi_device *dev = lis3->bus_priv;
134 unsigned long long ret; /* Not used when writting */
135 union acpi_object in_obj[2];
136 struct acpi_object_list args = { 2, in_obj };
138 in_obj[0].type = ACPI_TYPE_INTEGER;
139 in_obj[0].integer.value = reg;
140 in_obj[1].type = ACPI_TYPE_INTEGER;
141 in_obj[1].integer.value = val;
143 if (acpi_evaluate_integer(dev->handle, "ALWR", &args, &ret) != AE_OK)
149 static int lis3lv02d_dmi_matched(const struct dmi_system_id *dmi)
151 lis3_dev.ac = *((union axis_conversion *)dmi->driver_data);
152 pr_info("hardware type %s found\n", dmi->ident);
157 /* Represents, for each axis seen by userspace, the corresponding hw axis (+1).
158 * If the value is negative, the opposite of the hw value is used. */
159 #define DEFINE_CONV(name, x, y, z) \
160 static union axis_conversion lis3lv02d_axis_##name = \
161 { .as_array = { x, y, z } }
162 DEFINE_CONV(normal, 1, 2, 3);
163 DEFINE_CONV(y_inverted, 1, -2, 3);
164 DEFINE_CONV(x_inverted, -1, 2, 3);
165 DEFINE_CONV(x_inverted_usd, -1, 2, -3);
166 DEFINE_CONV(z_inverted, 1, 2, -3);
167 DEFINE_CONV(xy_swap, 2, 1, 3);
168 DEFINE_CONV(xy_rotated_left, -2, 1, 3);
169 DEFINE_CONV(xy_rotated_left_usd, -2, 1, -3);
170 DEFINE_CONV(xy_swap_inverted, -2, -1, 3);
171 DEFINE_CONV(xy_rotated_right, 2, -1, 3);
172 DEFINE_CONV(xy_swap_yz_inverted, 2, -1, -3);
174 #define AXIS_DMI_MATCH(_ident, _name, _axis) { \
176 .callback = lis3lv02d_dmi_matched, \
178 DMI_MATCH(DMI_PRODUCT_NAME, _name) \
180 .driver_data = &lis3lv02d_axis_##_axis \
183 #define AXIS_DMI_MATCH2(_ident, _class1, _name1, \
187 .callback = lis3lv02d_dmi_matched, \
189 DMI_MATCH(DMI_##_class1, _name1), \
190 DMI_MATCH(DMI_##_class2, _name2), \
192 .driver_data = &lis3lv02d_axis_##_axis \
194 static const struct dmi_system_id lis3lv02d_dmi_ids[] = {
195 /* product names are truncated to match all kinds of a same model */
196 AXIS_DMI_MATCH("NC64x0", "HP Compaq nc64", x_inverted),
197 AXIS_DMI_MATCH("NC84x0", "HP Compaq nc84", z_inverted),
198 AXIS_DMI_MATCH("NX9420", "HP Compaq nx9420", x_inverted),
199 AXIS_DMI_MATCH("NW9440", "HP Compaq nw9440", x_inverted),
200 AXIS_DMI_MATCH("NC2510", "HP Compaq 2510", y_inverted),
201 AXIS_DMI_MATCH("NC2710", "HP Compaq 2710", xy_swap),
202 AXIS_DMI_MATCH("NC8510", "HP Compaq 8510", xy_swap_inverted),
203 AXIS_DMI_MATCH("HP2133", "HP 2133", xy_rotated_left),
204 AXIS_DMI_MATCH("HP2140", "HP 2140", xy_swap_inverted),
205 AXIS_DMI_MATCH("NC653x", "HP Compaq 653", xy_rotated_left_usd),
206 AXIS_DMI_MATCH("NC6730b", "HP Compaq 6730b", xy_rotated_left_usd),
207 AXIS_DMI_MATCH("NC6730s", "HP Compaq 6730s", xy_swap),
208 AXIS_DMI_MATCH("NC651xx", "HP Compaq 651", xy_rotated_right),
209 AXIS_DMI_MATCH("NC6710x", "HP Compaq 6710", xy_swap_yz_inverted),
210 AXIS_DMI_MATCH("NC6715x", "HP Compaq 6715", y_inverted),
211 AXIS_DMI_MATCH("NC693xx", "HP EliteBook 693", xy_rotated_right),
212 AXIS_DMI_MATCH("NC693xx", "HP EliteBook 853", xy_swap),
213 AXIS_DMI_MATCH("NC854xx", "HP EliteBook 854", y_inverted),
214 AXIS_DMI_MATCH("NC273xx", "HP EliteBook 273", y_inverted),
215 /* Intel-based HP Pavilion dv5 */
216 AXIS_DMI_MATCH2("HPDV5_I",
217 PRODUCT_NAME, "HP Pavilion dv5",
220 /* AMD-based HP Pavilion dv5 */
221 AXIS_DMI_MATCH2("HPDV5_A",
222 PRODUCT_NAME, "HP Pavilion dv5",
225 AXIS_DMI_MATCH("DV7", "HP Pavilion dv7", x_inverted),
226 AXIS_DMI_MATCH("HP8710", "HP Compaq 8710", y_inverted),
227 AXIS_DMI_MATCH("HDX18", "HP HDX 18", x_inverted),
228 AXIS_DMI_MATCH("HPB432x", "HP ProBook 432", xy_rotated_left),
229 AXIS_DMI_MATCH("HPB440G3", "HP ProBook 440 G3", x_inverted_usd),
230 AXIS_DMI_MATCH("HPB440G4", "HP ProBook 440 G4", x_inverted),
231 AXIS_DMI_MATCH("HPB442x", "HP ProBook 442", xy_rotated_left),
232 AXIS_DMI_MATCH("HPB452x", "HP ProBook 452", y_inverted),
233 AXIS_DMI_MATCH("HPB522x", "HP ProBook 522", xy_swap),
234 AXIS_DMI_MATCH("HPB532x", "HP ProBook 532", y_inverted),
235 AXIS_DMI_MATCH("HPB655x", "HP ProBook 655", xy_swap_inverted),
236 AXIS_DMI_MATCH("Mini510x", "HP Mini 510", xy_rotated_left_usd),
237 AXIS_DMI_MATCH("HPB63xx", "HP ProBook 63", xy_swap),
238 AXIS_DMI_MATCH("HPB64xx", "HP ProBook 64", xy_swap),
239 AXIS_DMI_MATCH("HPB64xx", "HP EliteBook 84", xy_swap),
240 AXIS_DMI_MATCH("HPB65xx", "HP ProBook 65", x_inverted),
241 AXIS_DMI_MATCH("HPZBook15", "HP ZBook 15", x_inverted),
242 AXIS_DMI_MATCH("HPZBook17", "HP ZBook 17", xy_swap_yz_inverted),
244 /* Laptop models without axis info (yet):
245 * "NC6910" "HP Compaq 6910"
246 * "NC2400" "HP Compaq nc2400"
247 * "NX74x0" "HP Compaq nx74"
248 * "NX6325" "HP Compaq nx6325"
249 * "NC4400" "HP Compaq nc4400"
253 static void hpled_set(struct delayed_led_classdev *led_cdev, enum led_brightness value)
255 struct acpi_device *dev = lis3_dev.bus_priv;
256 unsigned long long ret; /* Not used when writing */
257 union acpi_object in_obj[1];
258 struct acpi_object_list args = { 1, in_obj };
260 in_obj[0].type = ACPI_TYPE_INTEGER;
261 in_obj[0].integer.value = !!value;
263 acpi_evaluate_integer(dev->handle, "ALED", &args, &ret);
266 static struct delayed_led_classdev hpled_led = {
268 .name = "hp::hddprotect",
269 .default_trigger = "none",
270 .brightness_set = delayed_sysfs_set,
271 .flags = LED_CORE_SUSPENDRESUME,
273 .set_brightness = hpled_set,
277 lis3lv02d_get_resource(struct acpi_resource *resource, void *context)
279 if (resource->type == ACPI_RESOURCE_TYPE_EXTENDED_IRQ) {
280 struct acpi_resource_extended_irq *irq;
281 u32 *device_irq = context;
283 irq = &resource->data.extended_irq;
284 *device_irq = irq->interrupts[0];
290 static void lis3lv02d_enum_resources(struct acpi_device *device)
294 status = acpi_walk_resources(device->handle, METHOD_NAME__CRS,
295 lis3lv02d_get_resource, &lis3_dev.irq);
296 if (ACPI_FAILURE(status))
297 printk(KERN_DEBUG DRIVER_NAME ": Error getting resources\n");
300 static bool hp_accel_i8042_filter(unsigned char data, unsigned char str,
303 static bool extended;
305 if (str & I8042_STR_AUXDATA)
311 } else if (unlikely(extended)) {
321 serio_interrupt(port, 0xe0, 0);
329 static int lis3lv02d_add(struct acpi_device *device)
336 lis3_dev.bus_priv = device;
337 lis3_dev.init = lis3lv02d_acpi_init;
338 lis3_dev.read = lis3lv02d_acpi_read;
339 lis3_dev.write = lis3lv02d_acpi_write;
340 strcpy(acpi_device_name(device), DRIVER_NAME);
341 strcpy(acpi_device_class(device), ACPI_MDPS_CLASS);
342 device->driver_data = &lis3_dev;
344 /* obtain IRQ number of our device from ACPI */
345 lis3lv02d_enum_resources(device);
347 /* If possible use a "standard" axes order */
348 if (lis3_dev.ac.x && lis3_dev.ac.y && lis3_dev.ac.z) {
349 pr_info("Using custom axes %d,%d,%d\n",
350 lis3_dev.ac.x, lis3_dev.ac.y, lis3_dev.ac.z);
351 } else if (dmi_check_system(lis3lv02d_dmi_ids) == 0) {
352 pr_info("laptop model unknown, using default axes configuration\n");
353 lis3_dev.ac = lis3lv02d_axis_normal;
356 /* call the core layer do its init */
357 ret = lis3lv02d_init_device(&lis3_dev);
361 /* filter to remove HPQ6000 accelerometer data
362 * from keyboard bus stream */
363 if (strstr(dev_name(&device->dev), "HPQ6000"))
364 i8042_install_filter(hp_accel_i8042_filter);
366 INIT_WORK(&hpled_led.work, delayed_set_status_worker);
367 ret = led_classdev_register(NULL, &hpled_led.led_classdev);
369 lis3lv02d_joystick_disable(&lis3_dev);
370 lis3lv02d_poweroff(&lis3_dev);
371 flush_work(&hpled_led.work);
378 static int lis3lv02d_remove(struct acpi_device *device)
383 i8042_remove_filter(hp_accel_i8042_filter);
384 lis3lv02d_joystick_disable(&lis3_dev);
385 lis3lv02d_poweroff(&lis3_dev);
387 led_classdev_unregister(&hpled_led.led_classdev);
388 flush_work(&hpled_led.work);
390 return lis3lv02d_remove_fs(&lis3_dev);
394 #ifdef CONFIG_PM_SLEEP
395 static int lis3lv02d_suspend(struct device *dev)
397 /* make sure the device is off when we suspend */
398 lis3lv02d_poweroff(&lis3_dev);
402 static int lis3lv02d_resume(struct device *dev)
404 lis3lv02d_poweron(&lis3_dev);
408 static SIMPLE_DEV_PM_OPS(hp_accel_pm, lis3lv02d_suspend, lis3lv02d_resume);
409 #define HP_ACCEL_PM (&hp_accel_pm)
411 #define HP_ACCEL_PM NULL
414 /* For the HP MDPS aka 3D Driveguard */
415 static struct acpi_driver lis3lv02d_driver = {
417 .class = ACPI_MDPS_CLASS,
418 .ids = lis3lv02d_device_ids,
420 .add = lis3lv02d_add,
421 .remove = lis3lv02d_remove,
423 .drv.pm = HP_ACCEL_PM,
425 module_acpi_driver(lis3lv02d_driver);
427 MODULE_DESCRIPTION("Glue between LIS3LV02Dx and HP ACPI BIOS and support for disk protection LED.");
428 MODULE_AUTHOR("Yan Burman, Eric Piel, Pavel Machek");
429 MODULE_LICENSE("GPL");