Harald Welte | 709ee53 | 2008-09-23 17:46:57 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Panasonic HotKey and LCD brightness control driver |
| 3 | * (C) 2004 Hiroshi Miura <miura@da-cha.org> |
| 4 | * (C) 2004 NTT DATA Intellilink Co. http://www.intellilink.co.jp/ |
| 5 | * (C) YOKOTA Hiroshi <yokota (at) netlab. is. tsukuba. ac. jp> |
| 6 | * (C) 2004 David Bronaugh <dbronaugh> |
| 7 | * (C) 2006-2008 Harald Welte <laforge@gnumonks.org> |
| 8 | * |
| 9 | * derived from toshiba_acpi.c, Copyright (C) 2002-2004 John Belmonte |
| 10 | * |
| 11 | * This program is free software; you can redistribute it and/or modify |
| 12 | * it under the terms of the GNU General Public License version 2 as |
| 13 | * publicshed by the Free Software Foundation. |
| 14 | * |
| 15 | * This program is distributed in the hope that it will be useful, |
| 16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 18 | * GNU General Public License for more details. |
| 19 | * |
| 20 | * You should have received a copy of the GNU General Public License |
| 21 | * along with this program; if not, write to the Free Software |
| 22 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 23 | * |
| 24 | *--------------------------------------------------------------------------- |
| 25 | * |
| 26 | * ChangeLog: |
| 27 | * Sep.23, 2008 Harald Welte <laforge@gnumonks.org> |
| 28 | * -v0.95 rename driver from drivers/acpi/pcc_acpi.c to |
| 29 | * drivers/misc/panasonic-laptop.c |
| 30 | * |
| 31 | * Jul.04, 2008 Harald Welte <laforge@gnumonks.org> |
| 32 | * -v0.94 replace /proc interface with device attributes |
| 33 | * support {set,get}keycode on th input device |
| 34 | * |
| 35 | * Jun.27, 2008 Harald Welte <laforge@gnumonks.org> |
| 36 | * -v0.92 merge with 2.6.26-rc6 input API changes |
| 37 | * remove broken <= 2.6.15 kernel support |
| 38 | * resolve all compiler warnings |
| 39 | * various coding style fixes (checkpatch.pl) |
| 40 | * add support for backlight api |
| 41 | * major code restructuring |
| 42 | * |
| 43 | * Dac.28, 2007 Harald Welte <laforge@gnumonks.org> |
| 44 | * -v0.91 merge with 2.6.24-rc6 ACPI changes |
| 45 | * |
| 46 | * Nov.04, 2006 Hiroshi Miura <miura@da-cha.org> |
| 47 | * -v0.9 remove warning about section reference. |
| 48 | * remove acpi_os_free |
| 49 | * add /proc/acpi/pcc/brightness interface for HAL access |
| 50 | * merge dbronaugh's enhancement |
| 51 | * Aug.17, 2004 David Bronaugh (dbronaugh) |
| 52 | * - Added screen brightness setting interface |
| 53 | * Thanks to FreeBSD crew (acpi_panasonic.c) |
| 54 | * for the ideas I needed to accomplish it |
| 55 | * |
| 56 | * May.29, 2006 Hiroshi Miura <miura@da-cha.org> |
| 57 | * -v0.8.4 follow to change keyinput structure |
| 58 | * thanks Fabian Yamaguchi <fabs@cs.tu-berlin.de>, |
| 59 | * Jacob Bower <jacob.bower@ic.ac.uk> and |
| 60 | * Hiroshi Yokota for providing solutions. |
| 61 | * |
| 62 | * Oct.02, 2004 Hiroshi Miura <miura@da-cha.org> |
| 63 | * -v0.8.2 merge code of YOKOTA Hiroshi |
| 64 | * <yokota@netlab.is.tsukuba.ac.jp>. |
| 65 | * Add sticky key mode interface. |
| 66 | * Refactoring acpi_pcc_generate_keyinput(). |
| 67 | * |
| 68 | * Sep.15, 2004 Hiroshi Miura <miura@da-cha.org> |
| 69 | * -v0.8 Generate key input event on input subsystem. |
| 70 | * This is based on yet another driver written by |
| 71 | * Ryuta Nakanishi. |
| 72 | * |
| 73 | * Sep.10, 2004 Hiroshi Miura <miura@da-cha.org> |
| 74 | * -v0.7 Change proc interface functions using seq_file |
| 75 | * facility as same as other ACPI drivers. |
| 76 | * |
| 77 | * Aug.28, 2004 Hiroshi Miura <miura@da-cha.org> |
| 78 | * -v0.6.4 Fix a silly error with status checking |
| 79 | * |
| 80 | * Aug.25, 2004 Hiroshi Miura <miura@da-cha.org> |
| 81 | * -v0.6.3 replace read_acpi_int by standard function |
| 82 | * acpi_evaluate_integer |
| 83 | * some clean up and make smart copyright notice. |
| 84 | * fix return value of pcc_acpi_get_key() |
| 85 | * fix checking return value of acpi_bus_register_driver() |
| 86 | * |
| 87 | * Aug.22, 2004 David Bronaugh <dbronaugh@linuxboxen.org> |
| 88 | * -v0.6.2 Add check on ACPI data (num_sifr) |
| 89 | * Coding style cleanups, better error messages/handling |
| 90 | * Fixed an off-by-one error in memory allocation |
| 91 | * |
| 92 | * Aug.21, 2004 David Bronaugh <dbronaugh@linuxboxen.org> |
| 93 | * -v0.6.1 Fix a silly error with status checking |
| 94 | * |
| 95 | * Aug.20, 2004 David Bronaugh <dbronaugh@linuxboxen.org> |
| 96 | * - v0.6 Correct brightness controls to reflect reality |
| 97 | * based on information gleaned by Hiroshi Miura |
| 98 | * and discussions with Hiroshi Miura |
| 99 | * |
| 100 | * Aug.10, 2004 Hiroshi Miura <miura@da-cha.org> |
| 101 | * - v0.5 support LCD brightness control |
| 102 | * based on the disclosed information by MEI. |
| 103 | * |
| 104 | * Jul.25, 2004 Hiroshi Miura <miura@da-cha.org> |
| 105 | * - v0.4 first post version |
| 106 | * add function to retrive SIFR |
| 107 | * |
| 108 | * Jul.24, 2004 Hiroshi Miura <miura@da-cha.org> |
| 109 | * - v0.3 get proper status of hotkey |
| 110 | * |
| 111 | * Jul.22, 2004 Hiroshi Miura <miura@da-cha.org> |
| 112 | * - v0.2 add HotKey handler |
| 113 | * |
| 114 | * Jul.17, 2004 Hiroshi Miura <miura@da-cha.org> |
| 115 | * - v0.1 start from toshiba_acpi driver written by John Belmonte |
| 116 | * |
| 117 | */ |
| 118 | |
| 119 | #include <linux/version.h> |
| 120 | #include <linux/kernel.h> |
| 121 | #include <linux/module.h> |
| 122 | #include <linux/init.h> |
| 123 | #include <linux/types.h> |
| 124 | #include <linux/backlight.h> |
| 125 | #include <linux/ctype.h> |
| 126 | #include <linux/seq_file.h> |
| 127 | #include <linux/uaccess.h> |
| 128 | #include <acpi/acpi_bus.h> |
| 129 | #include <acpi/acpi_drivers.h> |
| 130 | #include <linux/input.h> |
| 131 | |
| 132 | |
| 133 | #ifndef ACPI_HOTKEY_COMPONENT |
| 134 | #define ACPI_HOTKEY_COMPONENT 0x10000000 |
| 135 | #endif |
| 136 | |
| 137 | #define _COMPONENT ACPI_HOTKEY_COMPONENT |
| 138 | |
| 139 | MODULE_AUTHOR("Hiroshi Miura, David Bronaugh and Harald Welte"); |
| 140 | MODULE_DESCRIPTION("ACPI HotKey driver for Panasonic Let's Note laptops"); |
| 141 | MODULE_LICENSE("GPL"); |
| 142 | |
| 143 | #define LOGPREFIX "pcc_acpi: " |
| 144 | |
| 145 | /* Define ACPI PATHs */ |
| 146 | /* Lets note hotkeys */ |
| 147 | #define METHOD_HKEY_QUERY "HINF" |
| 148 | #define METHOD_HKEY_SQTY "SQTY" |
| 149 | #define METHOD_HKEY_SINF "SINF" |
| 150 | #define METHOD_HKEY_SSET "SSET" |
| 151 | #define HKEY_NOTIFY 0x80 |
| 152 | |
| 153 | #define ACPI_PCC_DRIVER_NAME "Panasonic Laptop Support" |
| 154 | #define ACPI_PCC_DEVICE_NAME "Hotkey" |
| 155 | #define ACPI_PCC_CLASS "pcc" |
| 156 | |
| 157 | #define ACPI_PCC_INPUT_PHYS "panasonic/hkey0" |
| 158 | |
| 159 | /* LCD_TYPEs: 0 = Normal, 1 = Semi-transparent |
| 160 | ENV_STATEs: Normal temp=0x01, High temp=0x81, N/A=0x00 |
| 161 | */ |
| 162 | enum SINF_BITS { SINF_NUM_BATTERIES = 0, |
| 163 | SINF_LCD_TYPE, |
| 164 | SINF_AC_MAX_BRIGHT, |
| 165 | SINF_AC_MIN_BRIGHT, |
| 166 | SINF_AC_CUR_BRIGHT, |
| 167 | SINF_DC_MAX_BRIGHT, |
| 168 | SINF_DC_MIN_BRIGHT, |
| 169 | SINF_DC_CUR_BRIGHT, |
| 170 | SINF_MUTE, |
| 171 | SINF_RESERVED, |
| 172 | SINF_ENV_STATE, |
| 173 | SINF_STICKY_KEY = 0x80, |
| 174 | }; |
| 175 | /* R1 handles SINF_AC_CUR_BRIGHT as SINF_CUR_BRIGHT, doesn't know AC state */ |
| 176 | |
| 177 | static int acpi_pcc_hotkey_add(struct acpi_device *device); |
| 178 | static int acpi_pcc_hotkey_remove(struct acpi_device *device, int type); |
| 179 | static int acpi_pcc_hotkey_resume(struct acpi_device *device); |
| 180 | |
| 181 | static const struct acpi_device_id pcc_device_ids[] = { |
| 182 | { "MAT0012", 0}, |
| 183 | { "MAT0013", 0}, |
| 184 | { "MAT0018", 0}, |
| 185 | { "MAT0019", 0}, |
| 186 | { "", 0}, |
| 187 | }; |
| 188 | |
| 189 | static struct acpi_driver acpi_pcc_driver = { |
| 190 | .name = ACPI_PCC_DRIVER_NAME, |
| 191 | .class = ACPI_PCC_CLASS, |
| 192 | .ids = pcc_device_ids, |
| 193 | .ops = { |
| 194 | .add = acpi_pcc_hotkey_add, |
| 195 | .remove = acpi_pcc_hotkey_remove, |
| 196 | .resume = acpi_pcc_hotkey_resume, |
| 197 | }, |
| 198 | }; |
| 199 | |
| 200 | #define KEYMAP_SIZE 11 |
| 201 | static const int initial_keymap[KEYMAP_SIZE] = { |
| 202 | /* 0 */ KEY_RESERVED, |
| 203 | /* 1 */ KEY_BRIGHTNESSDOWN, |
| 204 | /* 2 */ KEY_BRIGHTNESSUP, |
| 205 | /* 3 */ KEY_DISPLAYTOGGLE, |
| 206 | /* 4 */ KEY_MUTE, |
| 207 | /* 5 */ KEY_VOLUMEDOWN, |
| 208 | /* 6 */ KEY_VOLUMEUP, |
| 209 | /* 7 */ KEY_SLEEP, |
| 210 | /* 8 */ KEY_PROG1, /* Change CPU boost */ |
| 211 | /* 9 */ KEY_BATTERY, |
| 212 | /* 10 */ KEY_SUSPEND, |
| 213 | }; |
| 214 | |
| 215 | struct pcc_acpi { |
| 216 | acpi_handle handle; |
| 217 | unsigned long num_sifr; |
| 218 | int sticky_mode; |
| 219 | u32 *sinf; |
| 220 | struct acpi_device *device; |
| 221 | struct input_dev *input_dev; |
| 222 | struct backlight_device *backlight; |
| 223 | int keymap[KEYMAP_SIZE]; |
| 224 | }; |
| 225 | |
| 226 | struct pcc_keyinput { |
| 227 | struct acpi_hotkey *hotkey; |
| 228 | }; |
| 229 | |
| 230 | /* method access functions */ |
| 231 | static int acpi_pcc_write_sset(struct pcc_acpi *pcc, int func, int val) |
| 232 | { |
| 233 | union acpi_object in_objs[] = { |
| 234 | { .integer.type = ACPI_TYPE_INTEGER, |
| 235 | .integer.value = func, }, |
| 236 | { .integer.type = ACPI_TYPE_INTEGER, |
| 237 | .integer.value = val, }, |
| 238 | }; |
| 239 | struct acpi_object_list params = { |
| 240 | .count = ARRAY_SIZE(in_objs), |
| 241 | .pointer = in_objs, |
| 242 | }; |
| 243 | acpi_status status = AE_OK; |
| 244 | |
| 245 | ACPI_FUNCTION_TRACE("acpi_pcc_write_sset"); |
| 246 | |
| 247 | status = acpi_evaluate_object(pcc->handle, METHOD_HKEY_SSET, |
| 248 | ¶ms, NULL); |
| 249 | |
| 250 | return status == AE_OK; |
| 251 | } |
| 252 | |
| 253 | static inline int acpi_pcc_get_sqty(struct acpi_device *device) |
| 254 | { |
Len Brown | 3e2dab9 | 2008-10-11 02:30:14 -0400 | [diff] [blame] | 255 | unsigned long long s; |
Harald Welte | 709ee53 | 2008-09-23 17:46:57 +0200 | [diff] [blame] | 256 | acpi_status status; |
| 257 | |
| 258 | ACPI_FUNCTION_TRACE("acpi_pcc_get_sqty"); |
| 259 | |
| 260 | status = acpi_evaluate_integer(device->handle, METHOD_HKEY_SQTY, |
| 261 | NULL, &s); |
| 262 | if (ACPI_SUCCESS(status)) |
| 263 | return s; |
| 264 | else { |
| 265 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
| 266 | "evaluation error HKEY.SQTY\n")); |
| 267 | return -EINVAL; |
| 268 | } |
| 269 | } |
| 270 | |
| 271 | static int acpi_pcc_retrieve_biosdata(struct pcc_acpi *pcc, u32 *sinf) |
| 272 | { |
| 273 | acpi_status status; |
| 274 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; |
| 275 | union acpi_object *hkey = NULL; |
| 276 | int i; |
| 277 | |
| 278 | ACPI_FUNCTION_TRACE("acpi_pcc_retrieve_biosdata"); |
| 279 | |
| 280 | status = acpi_evaluate_object(pcc->handle, METHOD_HKEY_SINF, 0, |
| 281 | &buffer); |
| 282 | if (ACPI_FAILURE(status)) { |
| 283 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
| 284 | "evaluation error HKEY.SINF\n")); |
| 285 | return 0; |
| 286 | } |
| 287 | |
| 288 | hkey = buffer.pointer; |
| 289 | if (!hkey || (hkey->type != ACPI_TYPE_PACKAGE)) { |
| 290 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid HKEY.SINF\n")); |
| 291 | goto end; |
| 292 | } |
| 293 | |
| 294 | if (pcc->num_sifr < hkey->package.count) { |
| 295 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
| 296 | "SQTY reports bad SINF length\n")); |
| 297 | status = AE_ERROR; |
| 298 | goto end; |
| 299 | } |
| 300 | |
| 301 | for (i = 0; i < hkey->package.count; i++) { |
| 302 | union acpi_object *element = &(hkey->package.elements[i]); |
| 303 | if (likely(element->type == ACPI_TYPE_INTEGER)) { |
| 304 | sinf[i] = element->integer.value; |
| 305 | } else |
| 306 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
| 307 | "Invalid HKEY.SINF data\n")); |
| 308 | } |
| 309 | sinf[hkey->package.count] = -1; |
| 310 | |
| 311 | end: |
| 312 | kfree(buffer.pointer); |
| 313 | return status == AE_OK; |
| 314 | } |
| 315 | |
| 316 | /* backlight API interface functions */ |
| 317 | |
| 318 | /* This driver currently treats AC and DC brightness identical, |
| 319 | * since we don't need to invent an interface to the core ACPI |
| 320 | * logic to receive events in case a power supply is plugged in |
| 321 | * or removed */ |
| 322 | |
| 323 | static int bl_get(struct backlight_device *bd) |
| 324 | { |
| 325 | struct pcc_acpi *pcc = bl_get_data(bd); |
| 326 | |
| 327 | if (!acpi_pcc_retrieve_biosdata(pcc, pcc->sinf)) |
| 328 | return -EIO; |
| 329 | |
| 330 | return pcc->sinf[SINF_AC_CUR_BRIGHT]; |
| 331 | } |
| 332 | |
| 333 | static int bl_set_status(struct backlight_device *bd) |
| 334 | { |
| 335 | struct pcc_acpi *pcc = bl_get_data(bd); |
| 336 | int bright = bd->props.brightness; |
| 337 | int rc; |
| 338 | |
| 339 | if (!acpi_pcc_retrieve_biosdata(pcc, pcc->sinf)) |
| 340 | return -EIO; |
| 341 | |
| 342 | if (bright < pcc->sinf[SINF_AC_MIN_BRIGHT]) |
| 343 | bright = pcc->sinf[SINF_AC_MIN_BRIGHT]; |
| 344 | |
| 345 | if (bright < pcc->sinf[SINF_DC_MIN_BRIGHT]) |
| 346 | bright = pcc->sinf[SINF_DC_MIN_BRIGHT]; |
| 347 | |
| 348 | if (bright < pcc->sinf[SINF_AC_MIN_BRIGHT] || |
| 349 | bright > pcc->sinf[SINF_AC_MAX_BRIGHT]) |
| 350 | return -EINVAL; |
| 351 | |
| 352 | rc = acpi_pcc_write_sset(pcc, SINF_AC_CUR_BRIGHT, bright); |
| 353 | if (rc < 0) |
| 354 | return rc; |
| 355 | |
| 356 | return acpi_pcc_write_sset(pcc, SINF_DC_CUR_BRIGHT, bright); |
| 357 | } |
| 358 | |
| 359 | static struct backlight_ops pcc_backlight_ops = { |
| 360 | .get_brightness = bl_get, |
| 361 | .update_status = bl_set_status, |
| 362 | }; |
| 363 | |
| 364 | |
| 365 | /* sysfs user interface functions */ |
| 366 | |
| 367 | static ssize_t show_numbatt(struct device *dev, struct device_attribute *attr, |
| 368 | char *buf) |
| 369 | { |
| 370 | struct acpi_device *acpi = to_acpi_device(dev); |
| 371 | struct pcc_acpi *pcc = acpi_driver_data(acpi); |
| 372 | |
| 373 | if (!acpi_pcc_retrieve_biosdata(pcc, pcc->sinf)) |
| 374 | return -EIO; |
| 375 | |
| 376 | return sprintf(buf, "%u\n", pcc->sinf[SINF_NUM_BATTERIES]); |
| 377 | } |
| 378 | |
| 379 | static ssize_t show_lcdtype(struct device *dev, struct device_attribute *attr, |
| 380 | char *buf) |
| 381 | { |
| 382 | struct acpi_device *acpi = to_acpi_device(dev); |
| 383 | struct pcc_acpi *pcc = acpi_driver_data(acpi); |
| 384 | |
| 385 | if (!acpi_pcc_retrieve_biosdata(pcc, pcc->sinf)) |
| 386 | return -EIO; |
| 387 | |
| 388 | return sprintf(buf, "%u\n", pcc->sinf[SINF_LCD_TYPE]); |
| 389 | } |
| 390 | |
| 391 | static ssize_t show_mute(struct device *dev, struct device_attribute *attr, |
| 392 | char *buf) |
| 393 | { |
| 394 | struct acpi_device *acpi = to_acpi_device(dev); |
| 395 | struct pcc_acpi *pcc = acpi_driver_data(acpi); |
| 396 | |
| 397 | if (!acpi_pcc_retrieve_biosdata(pcc, pcc->sinf)) |
| 398 | return -EIO; |
| 399 | |
| 400 | return sprintf(buf, "%u\n", pcc->sinf[SINF_MUTE]); |
| 401 | } |
| 402 | |
| 403 | static ssize_t show_sticky(struct device *dev, struct device_attribute *attr, |
| 404 | char *buf) |
| 405 | { |
| 406 | struct acpi_device *acpi = to_acpi_device(dev); |
| 407 | struct pcc_acpi *pcc = acpi_driver_data(acpi); |
| 408 | |
| 409 | if (!acpi_pcc_retrieve_biosdata(pcc, pcc->sinf)) |
| 410 | return -EIO; |
| 411 | |
| 412 | return sprintf(buf, "%u\n", pcc->sinf[SINF_STICKY_KEY]); |
| 413 | } |
| 414 | |
| 415 | static ssize_t set_sticky(struct device *dev, struct device_attribute *attr, |
| 416 | const char *buf, size_t count) |
| 417 | { |
| 418 | struct acpi_device *acpi = to_acpi_device(dev); |
| 419 | struct pcc_acpi *pcc = acpi_driver_data(acpi); |
| 420 | int val; |
| 421 | |
| 422 | if (count && sscanf(buf, "%i", &val) == 1 && |
| 423 | (val == 0 || val == 1)) { |
| 424 | acpi_pcc_write_sset(pcc, SINF_STICKY_KEY, val); |
| 425 | pcc->sticky_mode = val; |
| 426 | } |
| 427 | |
| 428 | return count; |
| 429 | } |
| 430 | |
| 431 | static DEVICE_ATTR(numbatt, S_IRUGO, show_numbatt, NULL); |
| 432 | static DEVICE_ATTR(lcdtype, S_IRUGO, show_lcdtype, NULL); |
| 433 | static DEVICE_ATTR(mute, S_IRUGO, show_mute, NULL); |
| 434 | static DEVICE_ATTR(sticky_key, S_IRUGO | S_IWUSR, show_sticky, set_sticky); |
| 435 | |
| 436 | static struct attribute *pcc_sysfs_entries[] = { |
| 437 | &dev_attr_numbatt.attr, |
| 438 | &dev_attr_lcdtype.attr, |
| 439 | &dev_attr_mute.attr, |
| 440 | &dev_attr_sticky_key.attr, |
| 441 | NULL, |
| 442 | }; |
| 443 | |
| 444 | static struct attribute_group pcc_attr_group = { |
| 445 | .name = NULL, /* put in device directory */ |
| 446 | .attrs = pcc_sysfs_entries, |
| 447 | }; |
| 448 | |
| 449 | |
| 450 | /* hotkey input device driver */ |
| 451 | |
| 452 | static int pcc_getkeycode(struct input_dev *dev, int scancode, int *keycode) |
| 453 | { |
| 454 | struct pcc_acpi *pcc = input_get_drvdata(dev); |
| 455 | |
| 456 | if (scancode >= ARRAY_SIZE(pcc->keymap)) |
| 457 | return -EINVAL; |
| 458 | |
| 459 | *keycode = pcc->keymap[scancode]; |
| 460 | |
| 461 | return 0; |
| 462 | } |
| 463 | |
| 464 | static int keymap_get_by_keycode(struct pcc_acpi *pcc, int keycode) |
| 465 | { |
| 466 | int i; |
| 467 | |
| 468 | for (i = 0; i < ARRAY_SIZE(pcc->keymap); i++) { |
| 469 | if (pcc->keymap[i] == keycode) |
| 470 | return i+1; |
| 471 | } |
| 472 | |
| 473 | return 0; |
| 474 | } |
| 475 | |
| 476 | static int pcc_setkeycode(struct input_dev *dev, int scancode, int keycode) |
| 477 | { |
| 478 | struct pcc_acpi *pcc = input_get_drvdata(dev); |
| 479 | int oldkeycode; |
| 480 | |
| 481 | if (scancode >= ARRAY_SIZE(pcc->keymap)) |
| 482 | return -EINVAL; |
| 483 | |
| 484 | if (keycode < 0 || keycode > KEY_MAX) |
| 485 | return -EINVAL; |
| 486 | |
| 487 | oldkeycode = pcc->keymap[scancode]; |
| 488 | pcc->keymap[scancode] = keycode; |
| 489 | |
| 490 | set_bit(keycode, dev->keybit); |
| 491 | |
| 492 | if (!keymap_get_by_keycode(pcc, oldkeycode)) |
| 493 | clear_bit(oldkeycode, dev->keybit); |
| 494 | |
| 495 | return 0; |
| 496 | } |
| 497 | |
| 498 | static void acpi_pcc_generate_keyinput(struct pcc_acpi *pcc) |
| 499 | { |
| 500 | struct input_dev *hotk_input_dev = pcc->input_dev; |
| 501 | int rc; |
| 502 | int key_code, hkey_num; |
Len Brown | 3e2dab9 | 2008-10-11 02:30:14 -0400 | [diff] [blame] | 503 | unsigned long long result; |
Harald Welte | 709ee53 | 2008-09-23 17:46:57 +0200 | [diff] [blame] | 504 | |
| 505 | ACPI_FUNCTION_TRACE("acpi_pcc_generate_keyinput"); |
| 506 | |
| 507 | rc = acpi_evaluate_integer(pcc->handle, METHOD_HKEY_QUERY, |
| 508 | NULL, &result); |
| 509 | if (!ACPI_SUCCESS(rc)) { |
| 510 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
| 511 | "error getting hotkey status\n")); |
| 512 | return; |
| 513 | } |
| 514 | |
| 515 | acpi_bus_generate_proc_event(pcc->device, HKEY_NOTIFY, result); |
| 516 | |
| 517 | hkey_num = result & 0xf; |
| 518 | |
| 519 | if (hkey_num < 0 || hkey_num > ARRAY_SIZE(pcc->keymap)) { |
| 520 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
| 521 | "hotkey number out of range: %d\n", |
| 522 | hkey_num)); |
| 523 | return; |
| 524 | } |
| 525 | |
| 526 | key_code = pcc->keymap[hkey_num]; |
| 527 | |
| 528 | if (key_code != KEY_RESERVED) { |
| 529 | int pushed = (result & 0x80) ? TRUE : FALSE; |
| 530 | |
| 531 | input_report_key(hotk_input_dev, key_code, pushed); |
| 532 | input_sync(hotk_input_dev); |
| 533 | } |
| 534 | |
| 535 | return; |
| 536 | } |
| 537 | |
| 538 | static void acpi_pcc_hotkey_notify(acpi_handle handle, u32 event, void *data) |
| 539 | { |
| 540 | struct pcc_acpi *pcc = (struct pcc_acpi *) data; |
| 541 | |
| 542 | ACPI_FUNCTION_TRACE("acpi_pcc_hotkey_notify"); |
| 543 | |
| 544 | switch (event) { |
| 545 | case HKEY_NOTIFY: |
| 546 | acpi_pcc_generate_keyinput(pcc); |
| 547 | break; |
| 548 | default: |
| 549 | /* nothing to do */ |
| 550 | break; |
| 551 | } |
| 552 | } |
| 553 | |
| 554 | static int acpi_pcc_init_input(struct pcc_acpi *pcc) |
| 555 | { |
| 556 | int i, rc; |
| 557 | |
| 558 | ACPI_FUNCTION_TRACE("acpi_pcc_init_input"); |
| 559 | |
| 560 | pcc->input_dev = input_allocate_device(); |
| 561 | if (!pcc->input_dev) { |
| 562 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
| 563 | "Couldn't allocate input device for hotkey")); |
| 564 | return -ENOMEM; |
| 565 | } |
| 566 | |
| 567 | pcc->input_dev->evbit[0] = BIT(EV_KEY); |
| 568 | |
| 569 | pcc->input_dev->name = ACPI_PCC_DRIVER_NAME; |
| 570 | pcc->input_dev->phys = ACPI_PCC_INPUT_PHYS; |
| 571 | pcc->input_dev->id.bustype = BUS_HOST; |
| 572 | pcc->input_dev->id.vendor = 0x0001; |
| 573 | pcc->input_dev->id.product = 0x0001; |
| 574 | pcc->input_dev->id.version = 0x0100; |
| 575 | pcc->input_dev->getkeycode = pcc_getkeycode; |
| 576 | pcc->input_dev->setkeycode = pcc_setkeycode; |
| 577 | |
| 578 | /* load initial keymap */ |
| 579 | memcpy(pcc->keymap, initial_keymap, sizeof(pcc->keymap)); |
| 580 | |
| 581 | for (i = 0; i < ARRAY_SIZE(pcc->keymap); i++) |
| 582 | __set_bit(pcc->keymap[i], pcc->input_dev->keybit); |
| 583 | __clear_bit(KEY_RESERVED, pcc->input_dev->keybit); |
| 584 | |
| 585 | input_set_drvdata(pcc->input_dev, pcc); |
| 586 | |
| 587 | rc = input_register_device(pcc->input_dev); |
| 588 | if (rc < 0) |
| 589 | input_free_device(pcc->input_dev); |
| 590 | |
| 591 | return rc; |
| 592 | } |
| 593 | |
| 594 | /* kernel module interface */ |
| 595 | |
| 596 | static int acpi_pcc_hotkey_resume(struct acpi_device *device) |
| 597 | { |
| 598 | struct pcc_acpi *pcc = acpi_driver_data(device); |
| 599 | acpi_status status = AE_OK; |
| 600 | |
| 601 | ACPI_FUNCTION_TRACE("acpi_pcc_hotkey_resume"); |
| 602 | |
| 603 | if (device == NULL || pcc == NULL) |
| 604 | return -EINVAL; |
| 605 | |
| 606 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Sticky mode restore: %d\n", |
| 607 | pcc->sticky_mode)); |
| 608 | |
| 609 | status = acpi_pcc_write_sset(pcc, SINF_STICKY_KEY, pcc->sticky_mode); |
| 610 | |
| 611 | return status == AE_OK ? 0 : -EINVAL; |
| 612 | } |
| 613 | |
| 614 | static int acpi_pcc_hotkey_add(struct acpi_device *device) |
| 615 | { |
| 616 | acpi_status status; |
| 617 | struct pcc_acpi *pcc; |
| 618 | int num_sifr, result; |
| 619 | |
| 620 | ACPI_FUNCTION_TRACE("acpi_pcc_hotkey_add"); |
| 621 | |
| 622 | if (!device) |
| 623 | return -EINVAL; |
| 624 | |
| 625 | num_sifr = acpi_pcc_get_sqty(device); |
| 626 | |
| 627 | if (num_sifr > 255) { |
| 628 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "num_sifr too large")); |
| 629 | return -ENODEV; |
| 630 | } |
| 631 | |
| 632 | pcc = kzalloc(sizeof(struct pcc_acpi), GFP_KERNEL); |
| 633 | if (!pcc) { |
| 634 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
| 635 | "Couldn't allocate mem for pcc")); |
| 636 | return -ENOMEM; |
| 637 | } |
| 638 | |
| 639 | pcc->sinf = kzalloc(sizeof(u32) * (num_sifr + 1), GFP_KERNEL); |
| 640 | if (!pcc->sinf) { |
| 641 | result = -ENOMEM; |
| 642 | goto out_hotkey; |
| 643 | } |
| 644 | |
| 645 | pcc->device = device; |
| 646 | pcc->handle = device->handle; |
| 647 | pcc->num_sifr = num_sifr; |
Len Brown | 3e2dab9 | 2008-10-11 02:30:14 -0400 | [diff] [blame] | 648 | device->driver_data = pcc; |
Harald Welte | 709ee53 | 2008-09-23 17:46:57 +0200 | [diff] [blame] | 649 | strcpy(acpi_device_name(device), ACPI_PCC_DEVICE_NAME); |
| 650 | strcpy(acpi_device_class(device), ACPI_PCC_CLASS); |
| 651 | |
| 652 | result = acpi_pcc_init_input(pcc); |
| 653 | if (result) { |
| 654 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
| 655 | "Error installing keyinput handler\n")); |
| 656 | goto out_sinf; |
| 657 | } |
| 658 | |
| 659 | /* initialize hotkey input device */ |
| 660 | status = acpi_install_notify_handler(pcc->handle, ACPI_DEVICE_NOTIFY, |
| 661 | acpi_pcc_hotkey_notify, pcc); |
| 662 | |
| 663 | if (ACPI_FAILURE(status)) { |
| 664 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
| 665 | "Error installing notify handler\n")); |
| 666 | result = -ENODEV; |
| 667 | goto out_input; |
| 668 | } |
| 669 | |
| 670 | /* initialize backlight */ |
| 671 | pcc->backlight = backlight_device_register("panasonic", NULL, pcc, |
| 672 | &pcc_backlight_ops); |
| 673 | if (IS_ERR(pcc->backlight)) |
| 674 | goto out_notify; |
| 675 | |
| 676 | if (!acpi_pcc_retrieve_biosdata(pcc, pcc->sinf)) { |
| 677 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
| 678 | "Couldn't retrieve BIOS data\n")); |
| 679 | goto out_backlight; |
| 680 | } |
| 681 | |
| 682 | /* read the initial brightness setting from the hardware */ |
| 683 | pcc->backlight->props.max_brightness = |
| 684 | pcc->sinf[SINF_AC_MAX_BRIGHT]; |
| 685 | pcc->backlight->props.brightness = pcc->sinf[SINF_AC_CUR_BRIGHT]; |
| 686 | |
| 687 | /* read the initial sticky key mode from the hardware */ |
| 688 | pcc->sticky_mode = pcc->sinf[SINF_STICKY_KEY]; |
| 689 | |
| 690 | /* add sysfs attributes */ |
| 691 | result = sysfs_create_group(&device->dev.kobj, &pcc_attr_group); |
| 692 | if (result) |
| 693 | goto out_backlight; |
| 694 | |
| 695 | return 0; |
| 696 | |
| 697 | out_backlight: |
| 698 | backlight_device_unregister(pcc->backlight); |
| 699 | out_notify: |
| 700 | acpi_remove_notify_handler(pcc->handle, ACPI_DEVICE_NOTIFY, |
| 701 | acpi_pcc_hotkey_notify); |
| 702 | out_input: |
| 703 | input_unregister_device(pcc->input_dev); |
| 704 | /* no need to input_free_device() since core input API refcount and |
| 705 | * free()s the device */ |
| 706 | out_sinf: |
| 707 | kfree(pcc->sinf); |
| 708 | out_hotkey: |
| 709 | kfree(pcc); |
| 710 | |
| 711 | return result; |
| 712 | } |
| 713 | |
| 714 | static int __init acpi_pcc_init(void) |
| 715 | { |
| 716 | int result = 0; |
| 717 | |
| 718 | ACPI_FUNCTION_TRACE("acpi_pcc_init"); |
| 719 | |
| 720 | if (acpi_disabled) |
| 721 | return -ENODEV; |
| 722 | |
| 723 | result = acpi_bus_register_driver(&acpi_pcc_driver); |
| 724 | if (result < 0) { |
| 725 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
| 726 | "Error registering hotkey driver\n")); |
| 727 | return -ENODEV; |
| 728 | } |
| 729 | |
| 730 | return 0; |
| 731 | } |
| 732 | |
| 733 | static int acpi_pcc_hotkey_remove(struct acpi_device *device, int type) |
| 734 | { |
| 735 | struct pcc_acpi *pcc = acpi_driver_data(device); |
| 736 | |
| 737 | ACPI_FUNCTION_TRACE("acpi_pcc_hotkey_remove"); |
| 738 | |
| 739 | if (!device || !pcc) |
| 740 | return -EINVAL; |
| 741 | |
| 742 | sysfs_remove_group(&device->dev.kobj, &pcc_attr_group); |
| 743 | |
| 744 | backlight_device_unregister(pcc->backlight); |
| 745 | |
| 746 | acpi_remove_notify_handler(pcc->handle, ACPI_DEVICE_NOTIFY, |
| 747 | acpi_pcc_hotkey_notify); |
| 748 | |
| 749 | input_unregister_device(pcc->input_dev); |
| 750 | /* no need to input_free_device() since core input API refcount and |
| 751 | * free()s the device */ |
| 752 | |
| 753 | kfree(pcc->sinf); |
| 754 | kfree(pcc); |
| 755 | |
| 756 | return 0; |
| 757 | } |
| 758 | |
| 759 | static void __exit acpi_pcc_exit(void) |
| 760 | { |
| 761 | ACPI_FUNCTION_TRACE("acpi_pcc_exit"); |
| 762 | |
| 763 | acpi_bus_unregister_driver(&acpi_pcc_driver); |
| 764 | } |
| 765 | |
| 766 | module_init(acpi_pcc_init); |
| 767 | module_exit(acpi_pcc_exit); |