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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * hp_accel.c - Interface between LIS3LV02DL driver and HP ACPI BIOS4 *5 * Copyright (C) 2007-2008 Yan Burman6 * Copyright (C) 2008 Eric Piel7 * Copyright (C) 2008-2009 Pavel Machek8 */9 10#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt11 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"30 31/* Delayed LEDs infrastructure ------------------------------------ */32 33/* Special LED class that can defer work */34struct delayed_led_classdev {35 struct led_classdev led_classdev;36 struct work_struct work;37 enum led_brightness new_brightness;38 39 unsigned int led; /* For driver */40 void (*set_brightness)(struct delayed_led_classdev *data, enum led_brightness value);41};42 43static inline void delayed_set_status_worker(struct work_struct *work)44{45 struct delayed_led_classdev *data =46 container_of(work, struct delayed_led_classdev, work);47 48 data->set_brightness(data, data->new_brightness);49}50 51static inline void delayed_sysfs_set(struct led_classdev *led_cdev,52 enum led_brightness brightness)53{54 struct delayed_led_classdev *data = container_of(led_cdev,55 struct delayed_led_classdev, led_classdev);56 data->new_brightness = brightness;57 schedule_work(&data->work);58}59 60/* HP-specific accelerometer driver ------------------------------------ */61 62/* e0 25, e0 26, e0 27, e0 28 are scan codes that the accelerometer with acpi id63 * HPQ6000 sends through the keyboard bus */64#define ACCEL_1 0x2565#define ACCEL_2 0x2666#define ACCEL_3 0x2767#define ACCEL_4 0x2868 69/* For automatic insertion of the module */70static const struct acpi_device_id lis3lv02d_device_ids[] = {71 {"HPQ0004", 0}, /* HP Mobile Data Protection System PNP */72 {"HPQ6000", 0}, /* HP Mobile Data Protection System PNP */73 {"HPQ6007", 0}, /* HP Mobile Data Protection System PNP */74 {"", 0},75};76MODULE_DEVICE_TABLE(acpi, lis3lv02d_device_ids);77 78/**79 * lis3lv02d_acpi_init - initialize the device for ACPI80 * @lis3: pointer to the device struct81 *82 * Returns 0 on success.83 */84static int lis3lv02d_acpi_init(struct lis3lv02d *lis3)85{86 return 0;87}88 89/**90 * lis3lv02d_acpi_read - ACPI ALRD method: read a register91 * @lis3: pointer to the device struct92 * @reg: the register to read93 * @ret: result of the operation94 *95 * Returns 0 on success.96 */97static int lis3lv02d_acpi_read(struct lis3lv02d *lis3, int reg, u8 *ret)98{99 struct acpi_device *dev = lis3->bus_priv;100 union acpi_object arg0 = { ACPI_TYPE_INTEGER };101 struct acpi_object_list args = { 1, &arg0 };102 unsigned long long lret;103 acpi_status status;104 105 arg0.integer.value = reg;106 107 status = acpi_evaluate_integer(dev->handle, "ALRD", &args, &lret);108 if (ACPI_FAILURE(status))109 return -EINVAL;110 *ret = lret;111 return 0;112}113 114/**115 * lis3lv02d_acpi_write - ACPI ALWR method: write to a register116 * @lis3: pointer to the device struct117 * @reg: the register to write to118 * @val: the value to write119 *120 * Returns 0 on success.121 */122static int lis3lv02d_acpi_write(struct lis3lv02d *lis3, int reg, u8 val)123{124 struct acpi_device *dev = lis3->bus_priv;125 unsigned long long ret; /* Not used when writting */126 union acpi_object in_obj[2];127 struct acpi_object_list args = { 2, in_obj };128 129 in_obj[0].type = ACPI_TYPE_INTEGER;130 in_obj[0].integer.value = reg;131 in_obj[1].type = ACPI_TYPE_INTEGER;132 in_obj[1].integer.value = val;133 134 if (acpi_evaluate_integer(dev->handle, "ALWR", &args, &ret) != AE_OK)135 return -EINVAL;136 137 return 0;138}139 140static int lis3lv02d_dmi_matched(const struct dmi_system_id *dmi)141{142 lis3_dev.ac = *((union axis_conversion *)dmi->driver_data);143 pr_info("hardware type %s found\n", dmi->ident);144 145 return 1;146}147 148/* Represents, for each axis seen by userspace, the corresponding hw axis (+1).149 * If the value is negative, the opposite of the hw value is used. */150#define DEFINE_CONV(name, x, y, z) \151 static union axis_conversion lis3lv02d_axis_##name = \152 { .as_array = { x, y, z } }153DEFINE_CONV(normal, 1, 2, 3);154DEFINE_CONV(y_inverted, 1, -2, 3);155DEFINE_CONV(x_inverted, -1, 2, 3);156DEFINE_CONV(x_inverted_usd, -1, 2, -3);157DEFINE_CONV(z_inverted, 1, 2, -3);158DEFINE_CONV(xy_swap, 2, 1, 3);159DEFINE_CONV(xy_rotated_left, -2, 1, 3);160DEFINE_CONV(xy_rotated_left_usd, -2, 1, -3);161DEFINE_CONV(xy_swap_inverted, -2, -1, 3);162DEFINE_CONV(xy_rotated_right, 2, -1, 3);163DEFINE_CONV(xy_swap_yz_inverted, 2, -1, -3);164 165#define AXIS_DMI_MATCH(_ident, _name, _axis) { \166 .ident = _ident, \167 .callback = lis3lv02d_dmi_matched, \168 .matches = { \169 DMI_MATCH(DMI_PRODUCT_NAME, _name) \170 }, \171 .driver_data = &lis3lv02d_axis_##_axis \172}173 174#define AXIS_DMI_MATCH2(_ident, _class1, _name1, \175 _class2, _name2, \176 _axis) { \177 .ident = _ident, \178 .callback = lis3lv02d_dmi_matched, \179 .matches = { \180 DMI_MATCH(DMI_##_class1, _name1), \181 DMI_MATCH(DMI_##_class2, _name2), \182 }, \183 .driver_data = &lis3lv02d_axis_##_axis \184}185static const struct dmi_system_id lis3lv02d_dmi_ids[] = {186 /* product names are truncated to match all kinds of a same model */187 AXIS_DMI_MATCH("NC64x0", "HP Compaq nc64", x_inverted),188 AXIS_DMI_MATCH("NC84x0", "HP Compaq nc84", z_inverted),189 AXIS_DMI_MATCH("NX9420", "HP Compaq nx9420", x_inverted),190 AXIS_DMI_MATCH("NW9440", "HP Compaq nw9440", x_inverted),191 AXIS_DMI_MATCH("NC2510", "HP Compaq 2510", y_inverted),192 AXIS_DMI_MATCH("NC2710", "HP Compaq 2710", xy_swap),193 AXIS_DMI_MATCH("NC8510", "HP Compaq 8510", xy_swap_inverted),194 AXIS_DMI_MATCH("HP2133", "HP 2133", xy_rotated_left),195 AXIS_DMI_MATCH("HP2140", "HP 2140", xy_swap_inverted),196 AXIS_DMI_MATCH("NC653x", "HP Compaq 653", xy_rotated_left_usd),197 AXIS_DMI_MATCH("NC6730b", "HP Compaq 6730b", xy_rotated_left_usd),198 AXIS_DMI_MATCH("NC6730s", "HP Compaq 6730s", xy_swap),199 AXIS_DMI_MATCH("NC651xx", "HP Compaq 651", xy_rotated_right),200 AXIS_DMI_MATCH("NC6710x", "HP Compaq 6710", xy_swap_yz_inverted),201 AXIS_DMI_MATCH("NC6715x", "HP Compaq 6715", y_inverted),202 AXIS_DMI_MATCH("NC693xx", "HP EliteBook 693", xy_rotated_right),203 AXIS_DMI_MATCH("NC693xx", "HP EliteBook 853", xy_swap),204 AXIS_DMI_MATCH("NC854xx", "HP EliteBook 854", y_inverted),205 AXIS_DMI_MATCH("NC273xx", "HP EliteBook 273", y_inverted),206 /* Intel-based HP Pavilion dv5 */207 AXIS_DMI_MATCH2("HPDV5_I",208 PRODUCT_NAME, "HP Pavilion dv5",209 BOARD_NAME, "3603",210 x_inverted),211 /* AMD-based HP Pavilion dv5 */212 AXIS_DMI_MATCH2("HPDV5_A",213 PRODUCT_NAME, "HP Pavilion dv5",214 BOARD_NAME, "3600",215 y_inverted),216 AXIS_DMI_MATCH("DV7", "HP Pavilion dv7", x_inverted),217 AXIS_DMI_MATCH("HP8710", "HP Compaq 8710", y_inverted),218 AXIS_DMI_MATCH("HDX18", "HP HDX 18", x_inverted),219 AXIS_DMI_MATCH("HPB432x", "HP ProBook 432", xy_rotated_left),220 AXIS_DMI_MATCH("HPB440G3", "HP ProBook 440 G3", x_inverted_usd),221 AXIS_DMI_MATCH("HPB440G4", "HP ProBook 440 G4", x_inverted),222 AXIS_DMI_MATCH("HPB442x", "HP ProBook 442", xy_rotated_left),223 AXIS_DMI_MATCH("HPB450G0", "HP ProBook 450 G0", x_inverted),224 AXIS_DMI_MATCH("HPB452x", "HP ProBook 452", y_inverted),225 AXIS_DMI_MATCH("HPB522x", "HP ProBook 522", xy_swap),226 AXIS_DMI_MATCH("HPB532x", "HP ProBook 532", y_inverted),227 AXIS_DMI_MATCH("HPB655x", "HP ProBook 655", xy_swap_inverted),228 AXIS_DMI_MATCH("Mini510x", "HP Mini 510", xy_rotated_left_usd),229 AXIS_DMI_MATCH("HPB63xx", "HP ProBook 63", xy_swap),230 AXIS_DMI_MATCH("HPB64xx", "HP ProBook 64", xy_swap),231 AXIS_DMI_MATCH("HPB64xx", "HP EliteBook 84", xy_swap),232 AXIS_DMI_MATCH("HPB65xx", "HP ProBook 65", x_inverted),233 AXIS_DMI_MATCH("HPZBook15", "HP ZBook 15", x_inverted),234 AXIS_DMI_MATCH("HPZBook17G5", "HP ZBook 17 G5", x_inverted),235 AXIS_DMI_MATCH("HPZBook17", "HP ZBook 17", xy_swap_yz_inverted),236 { NULL, }237/* Laptop models without axis info (yet):238 * "NC6910" "HP Compaq 6910"239 * "NC2400" "HP Compaq nc2400"240 * "NX74x0" "HP Compaq nx74"241 * "NX6325" "HP Compaq nx6325"242 * "NC4400" "HP Compaq nc4400"243 */244};245 246static void hpled_set(struct delayed_led_classdev *led_cdev, enum led_brightness value)247{248 struct acpi_device *dev = lis3_dev.bus_priv;249 unsigned long long ret; /* Not used when writing */250 union acpi_object in_obj[1];251 struct acpi_object_list args = { 1, in_obj };252 253 in_obj[0].type = ACPI_TYPE_INTEGER;254 in_obj[0].integer.value = !!value;255 256 acpi_evaluate_integer(dev->handle, "ALED", &args, &ret);257}258 259static struct delayed_led_classdev hpled_led = {260 .led_classdev = {261 .name = "hp::hddprotect",262 .default_trigger = "none",263 .brightness_set = delayed_sysfs_set,264 .flags = LED_CORE_SUSPENDRESUME,265 },266 .set_brightness = hpled_set,267};268 269static bool hp_accel_i8042_filter(unsigned char data, unsigned char str,270 struct serio *port)271{272 static bool extended;273 274 if (str & I8042_STR_AUXDATA)275 return false;276 277 if (data == 0xe0) {278 extended = true;279 return true;280 } else if (unlikely(extended)) {281 extended = false;282 283 switch (data) {284 case ACCEL_1:285 case ACCEL_2:286 case ACCEL_3:287 case ACCEL_4:288 return true;289 default:290 serio_interrupt(port, 0xe0, 0);291 return false;292 }293 }294 295 return false;296}297 298static int lis3lv02d_probe(struct platform_device *device)299{300 int ret;301 302 lis3_dev.bus_priv = ACPI_COMPANION(&device->dev);303 lis3_dev.init = lis3lv02d_acpi_init;304 lis3_dev.read = lis3lv02d_acpi_read;305 lis3_dev.write = lis3lv02d_acpi_write;306 307 /* obtain IRQ number of our device from ACPI */308 ret = platform_get_irq_optional(device, 0);309 if (ret > 0)310 lis3_dev.irq = ret;311 312 /* If possible use a "standard" axes order */313 if (lis3_dev.ac.x && lis3_dev.ac.y && lis3_dev.ac.z) {314 pr_info("Using custom axes %d,%d,%d\n",315 lis3_dev.ac.x, lis3_dev.ac.y, lis3_dev.ac.z);316 } else if (dmi_check_system(lis3lv02d_dmi_ids) == 0) {317 pr_info("laptop model unknown, using default axes configuration\n");318 lis3_dev.ac = lis3lv02d_axis_normal;319 }320 321 /* call the core layer do its init */322 ret = lis3lv02d_init_device(&lis3_dev);323 if (ret)324 return ret;325 326 /* filter to remove HPQ6000 accelerometer data327 * from keyboard bus stream */328 if (strstr(dev_name(&device->dev), "HPQ6000"))329 i8042_install_filter(hp_accel_i8042_filter);330 331 INIT_WORK(&hpled_led.work, delayed_set_status_worker);332 ret = led_classdev_register(NULL, &hpled_led.led_classdev);333 if (ret) {334 i8042_remove_filter(hp_accel_i8042_filter);335 lis3lv02d_joystick_disable(&lis3_dev);336 lis3lv02d_poweroff(&lis3_dev);337 flush_work(&hpled_led.work);338 lis3lv02d_remove_fs(&lis3_dev);339 return ret;340 }341 342 return ret;343}344 345static void lis3lv02d_remove(struct platform_device *device)346{347 i8042_remove_filter(hp_accel_i8042_filter);348 lis3lv02d_joystick_disable(&lis3_dev);349 lis3lv02d_poweroff(&lis3_dev);350 351 led_classdev_unregister(&hpled_led.led_classdev);352 flush_work(&hpled_led.work);353 354 lis3lv02d_remove_fs(&lis3_dev);355}356 357static int __maybe_unused lis3lv02d_suspend(struct device *dev)358{359 /* make sure the device is off when we suspend */360 lis3lv02d_poweroff(&lis3_dev);361 return 0;362}363 364static int __maybe_unused lis3lv02d_resume(struct device *dev)365{366 lis3lv02d_poweron(&lis3_dev);367 return 0;368}369 370static SIMPLE_DEV_PM_OPS(hp_accel_pm, lis3lv02d_suspend, lis3lv02d_resume);371 372/* For the HP MDPS aka 3D Driveguard */373static struct platform_driver lis3lv02d_driver = {374 .probe = lis3lv02d_probe,375 .remove_new = lis3lv02d_remove,376 .driver = {377 .name = "hp_accel",378 .pm = &hp_accel_pm,379 .acpi_match_table = lis3lv02d_device_ids,380 },381};382module_platform_driver(lis3lv02d_driver);383 384MODULE_DESCRIPTION("Glue between LIS3LV02Dx and HP ACPI BIOS and support for disk protection LED.");385MODULE_AUTHOR("Yan Burman, Eric Piel, Pavel Machek");386MODULE_LICENSE("GPL");387