1/* 2 * hp_accel.c - Interface between LIS3LV02DL driver and HP ACPI BIOS 3 * 4 * Copyright (C) 2007-2008 Yan Burman 5 * Copyright (C) 2008 Eric Piel 6 * Copyright (C) 2008-2009 Pavel Machek 7 * 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. 12 * 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. 17 * 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 21 */ 22 23#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 24 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" 41 42#define DRIVER_NAME "hp_accel" 43#define ACPI_MDPS_CLASS "accelerometer" 44 45/* Delayed LEDs infrastructure ------------------------------------ */ 46 47/* Special LED class that can defer work */ 48struct delayed_led_classdev { 49 struct led_classdev led_classdev; 50 struct work_struct work; 51 enum led_brightness new_brightness; 52 53 unsigned int led; /* For driver */ 54 void (*set_brightness)(struct delayed_led_classdev *data, enum led_brightness value); 55}; 56 57static inline void delayed_set_status_worker(struct work_struct *work) 58{ 59 struct delayed_led_classdev *data = 60 container_of(work, struct delayed_led_classdev, work); 61 62 data->set_brightness(data, data->new_brightness); 63} 64 65static inline void delayed_sysfs_set(struct led_classdev *led_cdev, 66 enum led_brightness brightness) 67{ 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); 72} 73 74/* HP-specific accelerometer driver ------------------------------------ */ 75 76/* For automatic insertion of the module */ 77static 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 {"", 0}, 81}; 82MODULE_DEVICE_TABLE(acpi, lis3lv02d_device_ids); 83 84 85/** 86 * lis3lv02d_acpi_init - ACPI _INI method: initialize the device. 87 * @lis3: pointer to the device struct 88 * 89 * Returns 0 on success. 90 */ 91int lis3lv02d_acpi_init(struct lis3lv02d *lis3) 92{ 93 struct acpi_device *dev = lis3->bus_priv; 94 if (acpi_evaluate_object(dev->handle, METHOD_NAME__INI, 95 NULL, NULL) != AE_OK) 96 return -EINVAL; 97 98 return 0; 99} 100 101/** 102 * lis3lv02d_acpi_read - ACPI ALRD method: read a register 103 * @lis3: pointer to the device struct 104 * @reg: the register to read 105 * @ret: result of the operation 106 * 107 * Returns 0 on success. 108 */ 109int lis3lv02d_acpi_read(struct lis3lv02d *lis3, int reg, u8 *ret) 110{ 111 struct acpi_device *dev = lis3->bus_priv; 112 union acpi_object arg0 = { ACPI_TYPE_INTEGER }; 113 struct acpi_object_list args = { 1, &arg0 }; 114 unsigned long long lret; 115 acpi_status status; 116 117 arg0.integer.value = reg; 118 119 status = acpi_evaluate_integer(dev->handle, "ALRD", &args, &lret); 120 *ret = lret; 121 return (status != AE_OK) ? -EINVAL : 0; 122} 123 124/** 125 * lis3lv02d_acpi_write - ACPI ALWR method: write to a register 126 * @lis3: pointer to the device struct 127 * @reg: the register to write to 128 * @val: the value to write 129 * 130 * Returns 0 on success. 131 */ 132int lis3lv02d_acpi_write(struct lis3lv02d *lis3, int reg, u8 val) 133{ 134 struct acpi_device *dev = lis3->bus_priv; 135 unsigned long long ret; /* Not used when writting */ 136 union acpi_object in_obj[2]; 137 struct acpi_object_list args = { 2, in_obj }; 138 139 in_obj[0].type = ACPI_TYPE_INTEGER; 140 in_obj[0].integer.value = reg; 141 in_obj[1].type = ACPI_TYPE_INTEGER; 142 in_obj[1].integer.value = val; 143 144 if (acpi_evaluate_integer(dev->handle, "ALWR", &args, &ret) != AE_OK) 145 return -EINVAL; 146 147 return 0; 148} 149 150static int lis3lv02d_dmi_matched(const struct dmi_system_id *dmi) 151{ 152 lis3_dev.ac = *((union axis_conversion *)dmi->driver_data); 153 pr_info("hardware type %s found\n", dmi->ident); 154 155 return 1; 156} 157 158/* Represents, for each axis seen by userspace, the corresponding hw axis (+1). 159 * If the value is negative, the opposite of the hw value is used. */ 160#define DEFINE_CONV(name, x, y, z) \ 161 static union axis_conversion lis3lv02d_axis_##name = \ 162 { .as_array = { x, y, z } } 163DEFINE_CONV(normal, 1, 2, 3); 164DEFINE_CONV(y_inverted, 1, -2, 3); 165DEFINE_CONV(x_inverted, -1, 2, 3); 166DEFINE_CONV(z_inverted, 1, 2, -3); 167DEFINE_CONV(xy_swap, 2, 1, 3); 168DEFINE_CONV(xy_rotated_left, -2, 1, 3); 169DEFINE_CONV(xy_rotated_left_usd, -2, 1, -3); 170DEFINE_CONV(xy_swap_inverted, -2, -1, 3); 171DEFINE_CONV(xy_rotated_right, 2, -1, 3); 172DEFINE_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} 194static 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("HPB442x", "HP ProBook 442", xy_rotated_left), 230 AXIS_DMI_MATCH("HPB452x", "HP ProBook 452", y_inverted), 231 AXIS_DMI_MATCH("HPB522x", "HP ProBook 522", xy_swap), 232 AXIS_DMI_MATCH("HPB532x", "HP ProBook 532", y_inverted), 233 AXIS_DMI_MATCH("HPB655x", "HP ProBook 655", xy_swap_inverted), 234 AXIS_DMI_MATCH("Mini510x", "HP Mini 510", xy_rotated_left_usd), 235 AXIS_DMI_MATCH("HPB63xx", "HP ProBook 63", xy_swap), 236 AXIS_DMI_MATCH("HPB64xx", "HP ProBook 64", xy_swap), 237 AXIS_DMI_MATCH("HPB64xx", "HP EliteBook 84", xy_swap), 238 AXIS_DMI_MATCH("HPB65xx", "HP ProBook 65", x_inverted), 239 { NULL, } 240/* Laptop models without axis info (yet): 241 * "NC6910" "HP Compaq 6910" 242 * "NC2400" "HP Compaq nc2400" 243 * "NX74x0" "HP Compaq nx74" 244 * "NX6325" "HP Compaq nx6325" 245 * "NC4400" "HP Compaq nc4400" 246 */ 247}; 248 249static void hpled_set(struct delayed_led_classdev *led_cdev, enum led_brightness value) 250{ 251 struct acpi_device *dev = lis3_dev.bus_priv; 252 unsigned long long ret; /* Not used when writing */ 253 union acpi_object in_obj[1]; 254 struct acpi_object_list args = { 1, in_obj }; 255 256 in_obj[0].type = ACPI_TYPE_INTEGER; 257 in_obj[0].integer.value = !!value; 258 259 acpi_evaluate_integer(dev->handle, "ALED", &args, &ret); 260} 261 262static struct delayed_led_classdev hpled_led = { 263 .led_classdev = { 264 .name = "hp::hddprotect", 265 .default_trigger = "none", 266 .brightness_set = delayed_sysfs_set, 267 .flags = LED_CORE_SUSPENDRESUME, 268 }, 269 .set_brightness = hpled_set, 270}; 271 272static acpi_status 273lis3lv02d_get_resource(struct acpi_resource *resource, void *context) 274{ 275 if (resource->type == ACPI_RESOURCE_TYPE_EXTENDED_IRQ) { 276 struct acpi_resource_extended_irq *irq; 277 u32 *device_irq = context; 278 279 irq = &resource->data.extended_irq; 280 *device_irq = irq->interrupts[0]; 281 } 282 283 return AE_OK; 284} 285 286static void lis3lv02d_enum_resources(struct acpi_device *device) 287{ 288 acpi_status status; 289 290 status = acpi_walk_resources(device->handle, METHOD_NAME__CRS, 291 lis3lv02d_get_resource, &lis3_dev.irq); 292 if (ACPI_FAILURE(status)) 293 printk(KERN_DEBUG DRIVER_NAME ": Error getting resources\n"); 294} 295 296static int lis3lv02d_add(struct acpi_device *device) 297{ 298 int ret; 299 300 if (!device) 301 return -EINVAL; 302 303 lis3_dev.bus_priv = device; 304 lis3_dev.init = lis3lv02d_acpi_init; 305 lis3_dev.read = lis3lv02d_acpi_read; 306 lis3_dev.write = lis3lv02d_acpi_write; 307 strcpy(acpi_device_name(device), DRIVER_NAME); 308 strcpy(acpi_device_class(device), ACPI_MDPS_CLASS); 309 device->driver_data = &lis3_dev; 310 311 /* obtain IRQ number of our device from ACPI */ 312 lis3lv02d_enum_resources(device); 313 314 /* If possible use a "standard" axes order */ 315 if (lis3_dev.ac.x && lis3_dev.ac.y && lis3_dev.ac.z) { 316 pr_info("Using custom axes %d,%d,%d\n", 317 lis3_dev.ac.x, lis3_dev.ac.y, lis3_dev.ac.z); 318 } else if (dmi_check_system(lis3lv02d_dmi_ids) == 0) { 319 pr_info("laptop model unknown, using default axes configuration\n"); 320 lis3_dev.ac = lis3lv02d_axis_normal; 321 } 322 323 /* call the core layer do its init */ 324 ret = lis3lv02d_init_device(&lis3_dev); 325 if (ret) 326 return ret; 327 328 INIT_WORK(&hpled_led.work, delayed_set_status_worker); 329 ret = led_classdev_register(NULL, &hpled_led.led_classdev); 330 if (ret) { 331 lis3lv02d_joystick_disable(&lis3_dev); 332 lis3lv02d_poweroff(&lis3_dev); 333 flush_work(&hpled_led.work); 334 return ret; 335 } 336 337 return ret; 338} 339 340static int lis3lv02d_remove(struct acpi_device *device, int type) 341{ 342 if (!device) 343 return -EINVAL; 344 345 lis3lv02d_joystick_disable(&lis3_dev); 346 lis3lv02d_poweroff(&lis3_dev); 347 348 led_classdev_unregister(&hpled_led.led_classdev); 349 flush_work(&hpled_led.work); 350 351 return lis3lv02d_remove_fs(&lis3_dev); 352} 353 354 355#ifdef CONFIG_PM 356static int lis3lv02d_suspend(struct acpi_device *device, pm_message_t state) 357{ 358 /* make sure the device is off when we suspend */ 359 lis3lv02d_poweroff(&lis3_dev); 360 return 0; 361} 362 363static int lis3lv02d_resume(struct acpi_device *device) 364{ 365 return lis3lv02d_poweron(&lis3_dev); 366} 367#else 368#define lis3lv02d_suspend NULL 369#define lis3lv02d_resume NULL 370#endif 371 372/* For the HP MDPS aka 3D Driveguard */ 373static struct acpi_driver lis3lv02d_driver = { 374 .name = DRIVER_NAME, 375 .class = ACPI_MDPS_CLASS, 376 .ids = lis3lv02d_device_ids, 377 .ops = { 378 .add = lis3lv02d_add, 379 .remove = lis3lv02d_remove, 380 .suspend = lis3lv02d_suspend, 381 .resume = lis3lv02d_resume, 382 } 383}; 384 385static int __init lis3lv02d_init_module(void) 386{ 387 int ret; 388 389 if (acpi_disabled) 390 return -ENODEV; 391 392 ret = acpi_bus_register_driver(&lis3lv02d_driver); 393 if (ret < 0) 394 return ret; 395 396 pr_info("driver loaded\n"); 397 398 return 0; 399} 400 401static void __exit lis3lv02d_exit_module(void) 402{ 403 acpi_bus_unregister_driver(&lis3lv02d_driver); 404} 405 406MODULE_DESCRIPTION("Glue between LIS3LV02Dx and HP ACPI BIOS and support for disk protection LED."); 407MODULE_AUTHOR("Yan Burman, Eric Piel, Pavel Machek"); 408MODULE_LICENSE("GPL"); 409 410module_init(lis3lv02d_init_module); 411module_exit(lis3lv02d_exit_module); 412