drivers/platform/x86/hp_accel.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *  hp_accel.c - Interface between LIS3LV02DL driver and HP ACPI BIOS
   4  *
   5  *  Copyright (C) 2007-2008 Yan Burman
   6  *  Copyright (C) 2008 Eric Piel
   7  *  Copyright (C) 2008-2009 Pavel Machek
   8  */
   9
  10 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  11
  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 #define DRIVER_NAME     "hp_accel"
  32 #define ACPI_MDPS_CLASS "accelerometer"
  33
  34 /* Delayed LEDs infrastructure ------------------------------------ */
  35
  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;
  41
  42         unsigned int led;               /* For driver */
  43         void (*set_brightness)(struct delayed_led_classdev *data, enum led_brightness value);
  44 };
  45
  46 static inline void delayed_set_status_worker(struct work_struct *work)
  47 {
  48         struct delayed_led_classdev *data =
  49                         container_of(work, struct delayed_led_classdev, work);
  50
  51         data->set_brightness(data, data->new_brightness);
  52 }
  53
  54 static inline void delayed_sysfs_set(struct led_classdev *led_cdev,
  55                               enum led_brightness brightness)
  56 {
  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);
  61 }
  62
  63 /* HP-specific accelerometer driver ------------------------------------ */
  64
  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 */
  67 #define ACCEL_1 0x25
  68 #define ACCEL_2 0x26
  69 #define ACCEL_3 0x27
  70 #define ACCEL_4 0x28
  71
  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 */
  77         {"", 0},
  78 };
  79 MODULE_DEVICE_TABLE(acpi, lis3lv02d_device_ids);
  80
  81
  82 /**
  83  * lis3lv02d_acpi_init - ACPI _INI method: initialize the device.
  84  * @lis3: pointer to the device struct
  85  *
  86  * Returns 0 on success.
  87  */
  88 static int lis3lv02d_acpi_init(struct lis3lv02d *lis3)
  89 {
  90         struct acpi_device *dev = lis3->bus_priv;
  91         if (acpi_evaluate_object(dev->handle, METHOD_NAME__INI,
  92                                  NULL, NULL) != AE_OK)
  93                 return -EINVAL;
  94
  95         return 0;
  96 }
  97
  98 /**
  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
 103  *
 104  * Returns 0 on success.
 105  */
 106 static int lis3lv02d_acpi_read(struct lis3lv02d *lis3, int reg, u8 *ret)
 107 {
 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;
 112         acpi_status status;
 113
 114         arg0.integer.value = reg;
 115
 116         status = acpi_evaluate_integer(dev->handle, "ALRD", &args, &lret);
 117         if (ACPI_FAILURE(status))
 118                 return -EINVAL;
 119         *ret = lret;
 120         return 0;
 121 }
 122
 123 /**
 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
 128  *
 129  * Returns 0 on success.
 130  */
 131 static int lis3lv02d_acpi_write(struct lis3lv02d *lis3, int reg, u8 val)
 132 {
 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 };
 137
 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;
 142
 143         if (acpi_evaluate_integer(dev->handle, "ALWR", &args, &ret) != AE_OK)
 144                 return -EINVAL;
 145
 146         return 0;
 147 }
 148
 149 static int lis3lv02d_dmi_matched(const struct dmi_system_id *dmi)
 150 {
 151         lis3_dev.ac = *((union axis_conversion *)dmi->driver_data);
 152         pr_info("hardware type %s found\n", dmi->ident);
 153
 154         return 1;
 155 }
 156
 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);
 173
 174 #define AXIS_DMI_MATCH(_ident, _name, _axis) {          \
 175         .ident = _ident,                                \
 176         .callback = lis3lv02d_dmi_matched,              \
 177         .matches = {                                    \
 178                 DMI_MATCH(DMI_PRODUCT_NAME, _name)      \
 179         },                                              \
 180         .driver_data = &lis3lv02d_axis_##_axis          \
 181 }
 182
 183 #define AXIS_DMI_MATCH2(_ident, _class1, _name1,        \
 184                                 _class2, _name2,        \
 185                                 _axis) {                \
 186         .ident = _ident,                                \
 187         .callback = lis3lv02d_dmi_matched,              \
 188         .matches = {                                    \
 189                 DMI_MATCH(DMI_##_class1, _name1),       \
 190                 DMI_MATCH(DMI_##_class2, _name2),       \
 191         },                                              \
 192         .driver_data = &lis3lv02d_axis_##_axis          \
 193 }
 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",
 218                         BOARD_NAME, "3603",
 219                         x_inverted),
 220         /* AMD-based HP Pavilion dv5 */
 221         AXIS_DMI_MATCH2("HPDV5_A",
 222                         PRODUCT_NAME, "HP Pavilion dv5",
 223                         BOARD_NAME, "3600",
 224                         y_inverted),
 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("HPB450G0", "HP ProBook 450 G0", x_inverted),
 233         AXIS_DMI_MATCH("HPB452x", "HP ProBook 452", y_inverted),
 234         AXIS_DMI_MATCH("HPB522x", "HP ProBook 522", xy_swap),
 235         AXIS_DMI_MATCH("HPB532x", "HP ProBook 532", y_inverted),
 236         AXIS_DMI_MATCH("HPB655x", "HP ProBook 655", xy_swap_inverted),
 237         AXIS_DMI_MATCH("Mini510x", "HP Mini 510", xy_rotated_left_usd),
 238         AXIS_DMI_MATCH("HPB63xx", "HP ProBook 63", xy_swap),
 239         AXIS_DMI_MATCH("HPB64xx", "HP ProBook 64", xy_swap),
 240         AXIS_DMI_MATCH("HPB64xx", "HP EliteBook 84", xy_swap),
 241         AXIS_DMI_MATCH("HPB65xx", "HP ProBook 65", x_inverted),
 242         AXIS_DMI_MATCH("HPZBook15", "HP ZBook 15", x_inverted),
 243         AXIS_DMI_MATCH("HPZBook17G5", "HP ZBook 17 G5", x_inverted),
 244         AXIS_DMI_MATCH("HPZBook17", "HP ZBook 17", xy_swap_yz_inverted),
 245         { NULL, }
 246 /* Laptop models without axis info (yet):
 247  * "NC6910" "HP Compaq 6910"
 248  * "NC2400" "HP Compaq nc2400"
 249  * "NX74x0" "HP Compaq nx74"
 250  * "NX6325" "HP Compaq nx6325"
 251  * "NC4400" "HP Compaq nc4400"
 252  */
 253 };
 254
 255 static void hpled_set(struct delayed_led_classdev *led_cdev, enum led_brightness value)
 256 {
 257         struct acpi_device *dev = lis3_dev.bus_priv;
 258         unsigned long long ret; /* Not used when writing */
 259         union acpi_object in_obj[1];
 260         struct acpi_object_list args = { 1, in_obj };
 261
 262         in_obj[0].type          = ACPI_TYPE_INTEGER;
 263         in_obj[0].integer.value = !!value;
 264
 265         acpi_evaluate_integer(dev->handle, "ALED", &args, &ret);
 266 }
 267
 268 static struct delayed_led_classdev hpled_led = {
 269         .led_classdev = {
 270                 .name                   = "hp::hddprotect",
 271                 .default_trigger        = "none",
 272                 .brightness_set         = delayed_sysfs_set,
 273                 .flags                  = LED_CORE_SUSPENDRESUME,
 274         },
 275         .set_brightness = hpled_set,
 276 };
 277
 278 static acpi_status
 279 lis3lv02d_get_resource(struct acpi_resource *resource, void *context)
 280 {
 281         if (resource->type == ACPI_RESOURCE_TYPE_EXTENDED_IRQ) {
 282                 struct acpi_resource_extended_irq *irq;
 283                 u32 *device_irq = context;
 284
 285                 irq = &resource->data.extended_irq;
 286                 *device_irq = irq->interrupts[0];
 287         }
 288
 289         return AE_OK;
 290 }
 291
 292 static void lis3lv02d_enum_resources(struct acpi_device *device)
 293 {
 294         acpi_status status;
 295
 296         status = acpi_walk_resources(device->handle, METHOD_NAME__CRS,
 297                                         lis3lv02d_get_resource, &lis3_dev.irq);
 298         if (ACPI_FAILURE(status))
 299                 printk(KERN_DEBUG DRIVER_NAME ": Error getting resources\n");
 300 }
 301
 302 static bool hp_accel_i8042_filter(unsigned char data, unsigned char str,
 303                                   struct serio *port)
 304 {
 305         static bool extended;
 306
 307         if (str & I8042_STR_AUXDATA)
 308                 return false;
 309
 310         if (data == 0xe0) {
 311                 extended = true;
 312                 return true;
 313         } else if (unlikely(extended)) {
 314                 extended = false;
 315
 316                 switch (data) {
 317                 case ACCEL_1:
 318                 case ACCEL_2:
 319                 case ACCEL_3:
 320                 case ACCEL_4:
 321                         return true;
 322                 default:
 323                         serio_interrupt(port, 0xe0, 0);
 324                         return false;
 325                 }
 326         }
 327
 328         return false;
 329 }
 330
 331 static int lis3lv02d_add(struct acpi_device *device)
 332 {
 333         int ret;
 334
 335         if (!device)
 336                 return -EINVAL;
 337
 338         lis3_dev.bus_priv = device;
 339         lis3_dev.init = lis3lv02d_acpi_init;
 340         lis3_dev.read = lis3lv02d_acpi_read;
 341         lis3_dev.write = lis3lv02d_acpi_write;
 342         strcpy(acpi_device_name(device), DRIVER_NAME);
 343         strcpy(acpi_device_class(device), ACPI_MDPS_CLASS);
 344         device->driver_data = &lis3_dev;
 345
 346         /* obtain IRQ number of our device from ACPI */
 347         lis3lv02d_enum_resources(device);
 348
 349         /* If possible use a "standard" axes order */
 350         if (lis3_dev.ac.x && lis3_dev.ac.y && lis3_dev.ac.z) {
 351                 pr_info("Using custom axes %d,%d,%d\n",
 352                         lis3_dev.ac.x, lis3_dev.ac.y, lis3_dev.ac.z);
 353         } else if (dmi_check_system(lis3lv02d_dmi_ids) == 0) {
 354                 pr_info("laptop model unknown, using default axes configuration\n");
 355                 lis3_dev.ac = lis3lv02d_axis_normal;
 356         }
 357
 358         /* call the core layer do its init */
 359         ret = lis3lv02d_init_device(&lis3_dev);
 360         if (ret)
 361                 return ret;
 362
 363         /* filter to remove HPQ6000 accelerometer data
 364          * from keyboard bus stream */
 365         if (strstr(dev_name(&device->dev), "HPQ6000"))
 366                 i8042_install_filter(hp_accel_i8042_filter);
 367
 368         INIT_WORK(&hpled_led.work, delayed_set_status_worker);
 369         ret = led_classdev_register(NULL, &hpled_led.led_classdev);
 370         if (ret) {
 371                 lis3lv02d_joystick_disable(&lis3_dev);
 372                 lis3lv02d_poweroff(&lis3_dev);
 373                 flush_work(&hpled_led.work);
 374                 return ret;
 375         }
 376
 377         return ret;
 378 }
 379
 380 static int lis3lv02d_remove(struct acpi_device *device)
 381 {
 382         if (!device)
 383                 return -EINVAL;
 384
 385         i8042_remove_filter(hp_accel_i8042_filter);
 386         lis3lv02d_joystick_disable(&lis3_dev);
 387         lis3lv02d_poweroff(&lis3_dev);
 388
 389         led_classdev_unregister(&hpled_led.led_classdev);
 390         flush_work(&hpled_led.work);
 391
 392         return lis3lv02d_remove_fs(&lis3_dev);
 393 }
 394
 395
 396 #ifdef CONFIG_PM_SLEEP
 397 static int lis3lv02d_suspend(struct device *dev)
 398 {
 399         /* make sure the device is off when we suspend */
 400         lis3lv02d_poweroff(&lis3_dev);
 401         return 0;
 402 }
 403
 404 static int lis3lv02d_resume(struct device *dev)
 405 {
 406         lis3lv02d_poweron(&lis3_dev);
 407         return 0;
 408 }
 409
 410 static SIMPLE_DEV_PM_OPS(hp_accel_pm, lis3lv02d_suspend, lis3lv02d_resume);
 411 #define HP_ACCEL_PM (&hp_accel_pm)
 412 #else
 413 #define HP_ACCEL_PM NULL
 414 #endif
 415
 416 /* For the HP MDPS aka 3D Driveguard */
 417 static struct acpi_driver lis3lv02d_driver = {
 418         .name  = DRIVER_NAME,
 419         .class = ACPI_MDPS_CLASS,
 420         .ids   = lis3lv02d_device_ids,
 421         .ops = {
 422                 .add     = lis3lv02d_add,
 423                 .remove  = lis3lv02d_remove,
 424         },
 425         .drv.pm = HP_ACCEL_PM,
 426 };
 427 module_acpi_driver(lis3lv02d_driver);
 428
 429 MODULE_DESCRIPTION("Glue between LIS3LV02Dx and HP ACPI BIOS and support for disk protection LED.");
 430 MODULE_AUTHOR("Yan Burman, Eric Piel, Pavel Machek");
 431 MODULE_LICENSE("GPL");