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#include <linux/kernel.h> 24#include <linux/init.h> 25#include <linux/dmi.h> 26#include <linux/module.h> 27#include <linux/types.h> 28#include <linux/platform_device.h> 29#include <linux/interrupt.h> 30#include <linux/delay.h> 31#include <linux/wait.h> 32#include <linux/poll.h> 33#include <linux/freezer.h> 34#include <linux/uaccess.h> 35#include <linux/leds.h> 36#include <acpi/acpi_drivers.h> 37#include <asm/atomic.h> 38#include "lis3lv02d.h" 39 40#define DRIVER_NAME "lis3lv02d" 41#define ACPI_MDPS_CLASS "accelerometer" 42 43/* Delayed LEDs infrastructure ------------------------------------ */ 44 45/* Special LED class that can defer work */ 46struct delayed_led_classdev { 47 struct led_classdev led_classdev; 48 struct work_struct work; 49 enum led_brightness new_brightness; 50 51 unsigned int led; /* For driver */ 52 void (*set_brightness)(struct delayed_led_classdev *data, enum led_brightness value); 53}; 54 55static inline void delayed_set_status_worker(struct work_struct *work) 56{ 57 struct delayed_led_classdev *data = 58 container_of(work, struct delayed_led_classdev, work); 59 60 data->set_brightness(data, data->new_brightness); 61} 62 63static inline void delayed_sysfs_set(struct led_classdev *led_cdev, 64 enum led_brightness brightness) 65{ 66 struct delayed_led_classdev *data = container_of(led_cdev, 67 struct delayed_led_classdev, led_classdev); 68 data->new_brightness = brightness; 69 schedule_work(&data->work); 70} 71 72/* HP-specific accelerometer driver ------------------------------------ */ 73 74/* For automatic insertion of the module */ 75static struct acpi_device_id lis3lv02d_device_ids[] = { 76 {"HPQ0004", 0}, /* HP Mobile Data Protection System PNP */ 77 {"", 0}, 78}; 79MODULE_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 */ 88int 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 */ 106int 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 *ret = lret; 118 return (status != AE_OK) ? -EINVAL : 0; 119} 120 121/** 122 * lis3lv02d_acpi_write - ACPI ALWR method: write to a register 123 * @lis3: pointer to the device struct 124 * @reg: the register to write to 125 * @val: the value to write 126 * 127 * Returns 0 on success. 128 */ 129int lis3lv02d_acpi_write(struct lis3lv02d *lis3, int reg, u8 val) 130{ 131 struct acpi_device *dev = lis3->bus_priv; 132 unsigned long long ret; /* Not used when writting */ 133 union acpi_object in_obj[2]; 134 struct acpi_object_list args = { 2, in_obj }; 135 136 in_obj[0].type = ACPI_TYPE_INTEGER; 137 in_obj[0].integer.value = reg; 138 in_obj[1].type = ACPI_TYPE_INTEGER; 139 in_obj[1].integer.value = val; 140 141 if (acpi_evaluate_integer(dev->handle, "ALWR", &args, &ret) != AE_OK) 142 return -EINVAL; 143 144 return 0; 145} 146 147static int lis3lv02d_dmi_matched(const struct dmi_system_id *dmi) 148{ 149 lis3_dev.ac = *((struct axis_conversion *)dmi->driver_data); 150 printk(KERN_INFO DRIVER_NAME ": hardware type %s found.\n", dmi->ident); 151 152 return 1; 153} 154 155/* Represents, for each axis seen by userspace, the corresponding hw axis (+1). 156 * If the value is negative, the opposite of the hw value is used. */ 157static struct axis_conversion lis3lv02d_axis_normal = {1, 2, 3}; 158static struct axis_conversion lis3lv02d_axis_y_inverted = {1, -2, 3}; 159static struct axis_conversion lis3lv02d_axis_x_inverted = {-1, 2, 3}; 160static struct axis_conversion lis3lv02d_axis_z_inverted = {1, 2, -3}; 161static struct axis_conversion lis3lv02d_axis_xy_swap = {2, 1, 3}; 162static struct axis_conversion lis3lv02d_axis_xy_rotated_left = {-2, 1, 3}; 163static struct axis_conversion lis3lv02d_axis_xy_rotated_left_usd = {-2, 1, -3}; 164static struct axis_conversion lis3lv02d_axis_xy_swap_inverted = {-2, -1, 3}; 165static struct axis_conversion lis3lv02d_axis_xy_rotated_right = {2, -1, 3}; 166static struct axis_conversion lis3lv02d_axis_xy_swap_yz_inverted = {2, -1, -3}; 167 168#define AXIS_DMI_MATCH(_ident, _name, _axis) { \ 169 .ident = _ident, \ 170 .callback = lis3lv02d_dmi_matched, \ 171 .matches = { \ 172 DMI_MATCH(DMI_PRODUCT_NAME, _name) \ 173 }, \ 174 .driver_data = &lis3lv02d_axis_##_axis \ 175} 176 177#define AXIS_DMI_MATCH2(_ident, _class1, _name1, \ 178 _class2, _name2, \ 179 _axis) { \ 180 .ident = _ident, \ 181 .callback = lis3lv02d_dmi_matched, \ 182 .matches = { \ 183 DMI_MATCH(DMI_##_class1, _name1), \ 184 DMI_MATCH(DMI_##_class2, _name2), \ 185 }, \ 186 .driver_data = &lis3lv02d_axis_##_axis \ 187} 188static struct dmi_system_id lis3lv02d_dmi_ids[] = { 189 /* product names are truncated to match all kinds of a same model */ 190 AXIS_DMI_MATCH("NC64x0", "HP Compaq nc64", x_inverted), 191 AXIS_DMI_MATCH("NC84x0", "HP Compaq nc84", z_inverted), 192 AXIS_DMI_MATCH("NX9420", "HP Compaq nx9420", x_inverted), 193 AXIS_DMI_MATCH("NW9440", "HP Compaq nw9440", x_inverted), 194 AXIS_DMI_MATCH("NC2510", "HP Compaq 2510", y_inverted), 195 AXIS_DMI_MATCH("NC2710", "HP Compaq 2710", xy_swap), 196 AXIS_DMI_MATCH("NC8510", "HP Compaq 8510", xy_swap_inverted), 197 AXIS_DMI_MATCH("HP2133", "HP 2133", xy_rotated_left), 198 AXIS_DMI_MATCH("HP2140", "HP 2140", xy_swap_inverted), 199 AXIS_DMI_MATCH("NC653x", "HP Compaq 653", xy_rotated_left_usd), 200 AXIS_DMI_MATCH("NC6730b", "HP Compaq 6730b", xy_rotated_left_usd), 201 AXIS_DMI_MATCH("NC6730s", "HP Compaq 6730s", xy_swap), 202 AXIS_DMI_MATCH("NC651xx", "HP Compaq 651", xy_rotated_right), 203 AXIS_DMI_MATCH("NC6710x", "HP Compaq 6710", xy_swap_yz_inverted), 204 AXIS_DMI_MATCH("NC6715x", "HP Compaq 6715", y_inverted), 205 AXIS_DMI_MATCH("NC693xx", "HP EliteBook 693", xy_rotated_right), 206 AXIS_DMI_MATCH("NC693xx", "HP EliteBook 853", xy_swap), 207 /* Intel-based HP Pavilion dv5 */ 208 AXIS_DMI_MATCH2("HPDV5_I", 209 PRODUCT_NAME, "HP Pavilion dv5", 210 BOARD_NAME, "3603", 211 x_inverted), 212 /* AMD-based HP Pavilion dv5 */ 213 AXIS_DMI_MATCH2("HPDV5_A", 214 PRODUCT_NAME, "HP Pavilion dv5", 215 BOARD_NAME, "3600", 216 y_inverted), 217 AXIS_DMI_MATCH("DV7", "HP Pavilion dv7", x_inverted), 218 AXIS_DMI_MATCH("HP8710", "HP Compaq 8710", y_inverted), 219 AXIS_DMI_MATCH("HDX18", "HP HDX 18", x_inverted), 220 AXIS_DMI_MATCH("HPB432x", "HP ProBook 432", xy_rotated_left), 221 AXIS_DMI_MATCH("HPB442x", "HP ProBook 442", xy_rotated_left), 222 AXIS_DMI_MATCH("HPB452x", "HP ProBook 452", y_inverted), 223 AXIS_DMI_MATCH("HPB522x", "HP ProBook 522", xy_swap), 224 AXIS_DMI_MATCH("HPB532x", "HP ProBook 532", y_inverted), 225 AXIS_DMI_MATCH("Mini5102", "HP Mini 5102", xy_rotated_left_usd), 226 { NULL, } 227/* Laptop models without axis info (yet): 228 * "NC6910" "HP Compaq 6910" 229 * "NC2400" "HP Compaq nc2400" 230 * "NX74x0" "HP Compaq nx74" 231 * "NX6325" "HP Compaq nx6325" 232 * "NC4400" "HP Compaq nc4400" 233 */ 234}; 235 236static void hpled_set(struct delayed_led_classdev *led_cdev, enum led_brightness value) 237{ 238 struct acpi_device *dev = lis3_dev.bus_priv; 239 unsigned long long ret; /* Not used when writing */ 240 union acpi_object in_obj[1]; 241 struct acpi_object_list args = { 1, in_obj }; 242 243 in_obj[0].type = ACPI_TYPE_INTEGER; 244 in_obj[0].integer.value = !!value; 245 246 acpi_evaluate_integer(dev->handle, "ALED", &args, &ret); 247} 248 249static struct delayed_led_classdev hpled_led = { 250 .led_classdev = { 251 .name = "hp::hddprotect", 252 .default_trigger = "none", 253 .brightness_set = delayed_sysfs_set, 254 .flags = LED_CORE_SUSPENDRESUME, 255 }, 256 .set_brightness = hpled_set, 257}; 258 259static acpi_status 260lis3lv02d_get_resource(struct acpi_resource *resource, void *context) 261{ 262 if (resource->type == ACPI_RESOURCE_TYPE_EXTENDED_IRQ) { 263 struct acpi_resource_extended_irq *irq; 264 u32 *device_irq = context; 265 266 irq = &resource->data.extended_irq; 267 *device_irq = irq->interrupts[0]; 268 } 269 270 return AE_OK; 271} 272 273static void lis3lv02d_enum_resources(struct acpi_device *device) 274{ 275 acpi_status status; 276 277 status = acpi_walk_resources(device->handle, METHOD_NAME__CRS, 278 lis3lv02d_get_resource, &lis3_dev.irq); 279 if (ACPI_FAILURE(status)) 280 printk(KERN_DEBUG DRIVER_NAME ": Error getting resources\n"); 281} 282 283static int lis3lv02d_add(struct acpi_device *device) 284{ 285 int ret; 286 287 if (!device) 288 return -EINVAL; 289 290 lis3_dev.bus_priv = device; 291 lis3_dev.init = lis3lv02d_acpi_init; 292 lis3_dev.read = lis3lv02d_acpi_read; 293 lis3_dev.write = lis3lv02d_acpi_write; 294 strcpy(acpi_device_name(device), DRIVER_NAME); 295 strcpy(acpi_device_class(device), ACPI_MDPS_CLASS); 296 device->driver_data = &lis3_dev; 297 298 /* obtain IRQ number of our device from ACPI */ 299 lis3lv02d_enum_resources(device); 300 301 /* If possible use a "standard" axes order */ 302 if (dmi_check_system(lis3lv02d_dmi_ids) == 0) { 303 printk(KERN_INFO DRIVER_NAME ": laptop model unknown, " 304 "using default axes configuration\n"); 305 lis3_dev.ac = lis3lv02d_axis_normal; 306 } 307 308 /* call the core layer do its init */ 309 ret = lis3lv02d_init_device(&lis3_dev); 310 if (ret) 311 return ret; 312 313 INIT_WORK(&hpled_led.work, delayed_set_status_worker); 314 ret = led_classdev_register(NULL, &hpled_led.led_classdev); 315 if (ret) { 316 lis3lv02d_joystick_disable(); 317 lis3lv02d_poweroff(&lis3_dev); 318 flush_work(&hpled_led.work); 319 return ret; 320 } 321 322 return ret; 323} 324 325static int lis3lv02d_remove(struct acpi_device *device, int type) 326{ 327 if (!device) 328 return -EINVAL; 329 330 lis3lv02d_joystick_disable(); 331 lis3lv02d_poweroff(&lis3_dev); 332 333 led_classdev_unregister(&hpled_led.led_classdev); 334 flush_work(&hpled_led.work); 335 336 return lis3lv02d_remove_fs(&lis3_dev); 337} 338 339 340#ifdef CONFIG_PM 341static int lis3lv02d_suspend(struct acpi_device *device, pm_message_t state) 342{ 343 /* make sure the device is off when we suspend */ 344 lis3lv02d_poweroff(&lis3_dev); 345 return 0; 346} 347 348static int lis3lv02d_resume(struct acpi_device *device) 349{ 350 lis3lv02d_poweron(&lis3_dev); 351 return 0; 352} 353#else 354#define lis3lv02d_suspend NULL 355#define lis3lv02d_resume NULL 356#endif 357 358/* For the HP MDPS aka 3D Driveguard */ 359static struct acpi_driver lis3lv02d_driver = { 360 .name = DRIVER_NAME, 361 .class = ACPI_MDPS_CLASS, 362 .ids = lis3lv02d_device_ids, 363 .ops = { 364 .add = lis3lv02d_add, 365 .remove = lis3lv02d_remove, 366 .suspend = lis3lv02d_suspend, 367 .resume = lis3lv02d_resume, 368 } 369}; 370 371static int __init lis3lv02d_init_module(void) 372{ 373 int ret; 374 375 if (acpi_disabled) 376 return -ENODEV; 377 378 ret = acpi_bus_register_driver(&lis3lv02d_driver); 379 if (ret < 0) 380 return ret; 381 382 printk(KERN_INFO DRIVER_NAME " driver loaded.\n"); 383 384 return 0; 385} 386 387static void __exit lis3lv02d_exit_module(void) 388{ 389 acpi_bus_unregister_driver(&lis3lv02d_driver); 390} 391 392MODULE_DESCRIPTION("Glue between LIS3LV02Dx and HP ACPI BIOS and support for disk protection LED."); 393MODULE_AUTHOR("Yan Burman, Eric Piel, Pavel Machek"); 394MODULE_LICENSE("GPL"); 395 396module_init(lis3lv02d_init_module); 397module_exit(lis3lv02d_exit_module); 398