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path: root/drivers/platform/x86/toshiba_acpi.c
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Diffstat (limited to 'drivers/platform/x86/toshiba_acpi.c')
-rw-r--r--drivers/platform/x86/toshiba_acpi.c259
1 files changed, 147 insertions, 112 deletions
diff --git a/drivers/platform/x86/toshiba_acpi.c b/drivers/platform/x86/toshiba_acpi.c
index 51c0a8bee414..77bf5d8f893a 100644
--- a/drivers/platform/x86/toshiba_acpi.c
+++ b/drivers/platform/x86/toshiba_acpi.c
@@ -42,6 +42,7 @@
42#include <linux/init.h> 42#include <linux/init.h>
43#include <linux/types.h> 43#include <linux/types.h>
44#include <linux/proc_fs.h> 44#include <linux/proc_fs.h>
45#include <linux/seq_file.h>
45#include <linux/backlight.h> 46#include <linux/backlight.h>
46#include <linux/platform_device.h> 47#include <linux/platform_device.h>
47#include <linux/rfkill.h> 48#include <linux/rfkill.h>
@@ -357,63 +358,6 @@ static int force_fan;
357static int last_key_event; 358static int last_key_event;
358static int key_event_valid; 359static int key_event_valid;
359 360
360typedef struct _ProcItem {
361 const char *name;
362 char *(*read_func) (char *);
363 unsigned long (*write_func) (const char *, unsigned long);
364} ProcItem;
365
366/* proc file handlers
367 */
368
369static int
370dispatch_read(char *page, char **start, off_t off, int count, int *eof,
371 ProcItem * item)
372{
373 char *p = page;
374 int len;
375
376 if (off == 0)
377 p = item->read_func(p);
378
379 /* ISSUE: I don't understand this code */
380 len = (p - page);
381 if (len <= off + count)
382 *eof = 1;
383 *start = page + off;
384 len -= off;
385 if (len > count)
386 len = count;
387 if (len < 0)
388 len = 0;
389 return len;
390}
391
392static int
393dispatch_write(struct file *file, const char __user * buffer,
394 unsigned long count, ProcItem * item)
395{
396 int result;
397 char *tmp_buffer;
398
399 /* Arg buffer points to userspace memory, which can't be accessed
400 * directly. Since we're making a copy, zero-terminate the
401 * destination so that sscanf can be used on it safely.
402 */
403 tmp_buffer = kmalloc(count + 1, GFP_KERNEL);
404 if (!tmp_buffer)
405 return -ENOMEM;
406
407 if (copy_from_user(tmp_buffer, buffer, count)) {
408 result = -EFAULT;
409 } else {
410 tmp_buffer[count] = 0;
411 result = item->write_func(tmp_buffer, count);
412 }
413 kfree(tmp_buffer);
414 return result;
415}
416
417static int get_lcd(struct backlight_device *bd) 361static int get_lcd(struct backlight_device *bd)
418{ 362{
419 u32 hci_result; 363 u32 hci_result;
@@ -426,19 +370,24 @@ static int get_lcd(struct backlight_device *bd)
426 return -EFAULT; 370 return -EFAULT;
427} 371}
428 372
429static char *read_lcd(char *p) 373static int lcd_proc_show(struct seq_file *m, void *v)
430{ 374{
431 int value = get_lcd(NULL); 375 int value = get_lcd(NULL);
432 376
433 if (value >= 0) { 377 if (value >= 0) {
434 p += sprintf(p, "brightness: %d\n", value); 378 seq_printf(m, "brightness: %d\n", value);
435 p += sprintf(p, "brightness_levels: %d\n", 379 seq_printf(m, "brightness_levels: %d\n",
436 HCI_LCD_BRIGHTNESS_LEVELS); 380 HCI_LCD_BRIGHTNESS_LEVELS);
437 } else { 381 } else {
438 printk(MY_ERR "Error reading LCD brightness\n"); 382 printk(MY_ERR "Error reading LCD brightness\n");
439 } 383 }
440 384
441 return p; 385 return 0;
386}
387
388static int lcd_proc_open(struct inode *inode, struct file *file)
389{
390 return single_open(file, lcd_proc_show, NULL);
442} 391}
443 392
444static int set_lcd(int value) 393static int set_lcd(int value)
@@ -458,12 +407,20 @@ static int set_lcd_status(struct backlight_device *bd)
458 return set_lcd(bd->props.brightness); 407 return set_lcd(bd->props.brightness);
459} 408}
460 409
461static unsigned long write_lcd(const char *buffer, unsigned long count) 410static ssize_t lcd_proc_write(struct file *file, const char __user *buf,
411 size_t count, loff_t *pos)
462{ 412{
413 char cmd[42];
414 size_t len;
463 int value; 415 int value;
464 int ret; 416 int ret;
465 417
466 if (sscanf(buffer, " brightness : %i", &value) == 1 && 418 len = min(count, sizeof(cmd) - 1);
419 if (copy_from_user(cmd, buf, len))
420 return -EFAULT;
421 cmd[len] = '\0';
422
423 if (sscanf(cmd, " brightness : %i", &value) == 1 &&
467 value >= 0 && value < HCI_LCD_BRIGHTNESS_LEVELS) { 424 value >= 0 && value < HCI_LCD_BRIGHTNESS_LEVELS) {
468 ret = set_lcd(value); 425 ret = set_lcd(value);
469 if (ret == 0) 426 if (ret == 0)
@@ -474,7 +431,16 @@ static unsigned long write_lcd(const char *buffer, unsigned long count)
474 return ret; 431 return ret;
475} 432}
476 433
477static char *read_video(char *p) 434static const struct file_operations lcd_proc_fops = {
435 .owner = THIS_MODULE,
436 .open = lcd_proc_open,
437 .read = seq_read,
438 .llseek = seq_lseek,
439 .release = single_release,
440 .write = lcd_proc_write,
441};
442
443static int video_proc_show(struct seq_file *m, void *v)
478{ 444{
479 u32 hci_result; 445 u32 hci_result;
480 u32 value; 446 u32 value;
@@ -484,18 +450,25 @@ static char *read_video(char *p)
484 int is_lcd = (value & HCI_VIDEO_OUT_LCD) ? 1 : 0; 450 int is_lcd = (value & HCI_VIDEO_OUT_LCD) ? 1 : 0;
485 int is_crt = (value & HCI_VIDEO_OUT_CRT) ? 1 : 0; 451 int is_crt = (value & HCI_VIDEO_OUT_CRT) ? 1 : 0;
486 int is_tv = (value & HCI_VIDEO_OUT_TV) ? 1 : 0; 452 int is_tv = (value & HCI_VIDEO_OUT_TV) ? 1 : 0;
487 p += sprintf(p, "lcd_out: %d\n", is_lcd); 453 seq_printf(m, "lcd_out: %d\n", is_lcd);
488 p += sprintf(p, "crt_out: %d\n", is_crt); 454 seq_printf(m, "crt_out: %d\n", is_crt);
489 p += sprintf(p, "tv_out: %d\n", is_tv); 455 seq_printf(m, "tv_out: %d\n", is_tv);
490 } else { 456 } else {
491 printk(MY_ERR "Error reading video out status\n"); 457 printk(MY_ERR "Error reading video out status\n");
492 } 458 }
493 459
494 return p; 460 return 0;
495} 461}
496 462
497static unsigned long write_video(const char *buffer, unsigned long count) 463static int video_proc_open(struct inode *inode, struct file *file)
498{ 464{
465 return single_open(file, video_proc_show, NULL);
466}
467
468static ssize_t video_proc_write(struct file *file, const char __user *buf,
469 size_t count, loff_t *pos)
470{
471 char *cmd, *buffer;
499 int value; 472 int value;
500 int remain = count; 473 int remain = count;
501 int lcd_out = -1; 474 int lcd_out = -1;
@@ -504,6 +477,17 @@ static unsigned long write_video(const char *buffer, unsigned long count)
504 u32 hci_result; 477 u32 hci_result;
505 u32 video_out; 478 u32 video_out;
506 479
480 cmd = kmalloc(count + 1, GFP_KERNEL);
481 if (!cmd)
482 return -ENOMEM;
483 if (copy_from_user(cmd, buf, count)) {
484 kfree(cmd);
485 return -EFAULT;
486 }
487 cmd[count] = '\0';
488
489 buffer = cmd;
490
507 /* scan expression. Multiple expressions may be delimited with ; 491 /* scan expression. Multiple expressions may be delimited with ;
508 * 492 *
509 * NOTE: to keep scanning simple, invalid fields are ignored 493 * NOTE: to keep scanning simple, invalid fields are ignored
@@ -523,6 +507,8 @@ static unsigned long write_video(const char *buffer, unsigned long count)
523 while (remain && *(buffer - 1) != ';'); 507 while (remain && *(buffer - 1) != ';');
524 } 508 }
525 509
510 kfree(cmd);
511
526 hci_read1(HCI_VIDEO_OUT, &video_out, &hci_result); 512 hci_read1(HCI_VIDEO_OUT, &video_out, &hci_result);
527 if (hci_result == HCI_SUCCESS) { 513 if (hci_result == HCI_SUCCESS) {
528 unsigned int new_video_out = video_out; 514 unsigned int new_video_out = video_out;
@@ -543,28 +529,50 @@ static unsigned long write_video(const char *buffer, unsigned long count)
543 return count; 529 return count;
544} 530}
545 531
546static char *read_fan(char *p) 532static const struct file_operations video_proc_fops = {
533 .owner = THIS_MODULE,
534 .open = video_proc_open,
535 .read = seq_read,
536 .llseek = seq_lseek,
537 .release = single_release,
538 .write = video_proc_write,
539};
540
541static int fan_proc_show(struct seq_file *m, void *v)
547{ 542{
548 u32 hci_result; 543 u32 hci_result;
549 u32 value; 544 u32 value;
550 545
551 hci_read1(HCI_FAN, &value, &hci_result); 546 hci_read1(HCI_FAN, &value, &hci_result);
552 if (hci_result == HCI_SUCCESS) { 547 if (hci_result == HCI_SUCCESS) {
553 p += sprintf(p, "running: %d\n", (value > 0)); 548 seq_printf(m, "running: %d\n", (value > 0));
554 p += sprintf(p, "force_on: %d\n", force_fan); 549 seq_printf(m, "force_on: %d\n", force_fan);
555 } else { 550 } else {
556 printk(MY_ERR "Error reading fan status\n"); 551 printk(MY_ERR "Error reading fan status\n");
557 } 552 }
558 553
559 return p; 554 return 0;
555}
556
557static int fan_proc_open(struct inode *inode, struct file *file)
558{
559 return single_open(file, fan_proc_show, NULL);
560} 560}
561 561
562static unsigned long write_fan(const char *buffer, unsigned long count) 562static ssize_t fan_proc_write(struct file *file, const char __user *buf,
563 size_t count, loff_t *pos)
563{ 564{
565 char cmd[42];
566 size_t len;
564 int value; 567 int value;
565 u32 hci_result; 568 u32 hci_result;
566 569
567 if (sscanf(buffer, " force_on : %i", &value) == 1 && 570 len = min(count, sizeof(cmd) - 1);
571 if (copy_from_user(cmd, buf, len))
572 return -EFAULT;
573 cmd[len] = '\0';
574
575 if (sscanf(cmd, " force_on : %i", &value) == 1 &&
568 value >= 0 && value <= 1) { 576 value >= 0 && value <= 1) {
569 hci_write1(HCI_FAN, value, &hci_result); 577 hci_write1(HCI_FAN, value, &hci_result);
570 if (hci_result != HCI_SUCCESS) 578 if (hci_result != HCI_SUCCESS)
@@ -578,7 +586,16 @@ static unsigned long write_fan(const char *buffer, unsigned long count)
578 return count; 586 return count;
579} 587}
580 588
581static char *read_keys(char *p) 589static const struct file_operations fan_proc_fops = {
590 .owner = THIS_MODULE,
591 .open = fan_proc_open,
592 .read = seq_read,
593 .llseek = seq_lseek,
594 .release = single_release,
595 .write = fan_proc_write,
596};
597
598static int keys_proc_show(struct seq_file *m, void *v)
582{ 599{
583 u32 hci_result; 600 u32 hci_result;
584 u32 value; 601 u32 value;
@@ -602,18 +619,30 @@ static char *read_keys(char *p)
602 } 619 }
603 } 620 }
604 621
605 p += sprintf(p, "hotkey_ready: %d\n", key_event_valid); 622 seq_printf(m, "hotkey_ready: %d\n", key_event_valid);
606 p += sprintf(p, "hotkey: 0x%04x\n", last_key_event); 623 seq_printf(m, "hotkey: 0x%04x\n", last_key_event);
624end:
625 return 0;
626}
607 627
608 end: 628static int keys_proc_open(struct inode *inode, struct file *file)
609 return p; 629{
630 return single_open(file, keys_proc_show, NULL);
610} 631}
611 632
612static unsigned long write_keys(const char *buffer, unsigned long count) 633static ssize_t keys_proc_write(struct file *file, const char __user *buf,
634 size_t count, loff_t *pos)
613{ 635{
636 char cmd[42];
637 size_t len;
614 int value; 638 int value;
615 639
616 if (sscanf(buffer, " hotkey_ready : %i", &value) == 1 && value == 0) { 640 len = min(count, sizeof(cmd) - 1);
641 if (copy_from_user(cmd, buf, len))
642 return -EFAULT;
643 cmd[len] = '\0';
644
645 if (sscanf(cmd, " hotkey_ready : %i", &value) == 1 && value == 0) {
617 key_event_valid = 0; 646 key_event_valid = 0;
618 } else { 647 } else {
619 return -EINVAL; 648 return -EINVAL;
@@ -622,52 +651,58 @@ static unsigned long write_keys(const char *buffer, unsigned long count)
622 return count; 651 return count;
623} 652}
624 653
625static char *read_version(char *p) 654static const struct file_operations keys_proc_fops = {
655 .owner = THIS_MODULE,
656 .open = keys_proc_open,
657 .read = seq_read,
658 .llseek = seq_lseek,
659 .release = single_release,
660 .write = keys_proc_write,
661};
662
663static int version_proc_show(struct seq_file *m, void *v)
626{ 664{
627 p += sprintf(p, "driver: %s\n", TOSHIBA_ACPI_VERSION); 665 seq_printf(m, "driver: %s\n", TOSHIBA_ACPI_VERSION);
628 p += sprintf(p, "proc_interface: %d\n", 666 seq_printf(m, "proc_interface: %d\n", PROC_INTERFACE_VERSION);
629 PROC_INTERFACE_VERSION); 667 return 0;
630 return p;
631} 668}
632 669
670static int version_proc_open(struct inode *inode, struct file *file)
671{
672 return single_open(file, version_proc_show, PDE(inode)->data);
673}
674
675static const struct file_operations version_proc_fops = {
676 .owner = THIS_MODULE,
677 .open = version_proc_open,
678 .read = seq_read,
679 .llseek = seq_lseek,
680 .release = single_release,
681};
682
633/* proc and module init 683/* proc and module init
634 */ 684 */
635 685
636#define PROC_TOSHIBA "toshiba" 686#define PROC_TOSHIBA "toshiba"
637 687
638static ProcItem proc_items[] = {
639 {"lcd", read_lcd, write_lcd},
640 {"video", read_video, write_video},
641 {"fan", read_fan, write_fan},
642 {"keys", read_keys, write_keys},
643 {"version", read_version, NULL},
644 {NULL}
645};
646
647static acpi_status __init add_device(void) 688static acpi_status __init add_device(void)
648{ 689{
649 struct proc_dir_entry *proc; 690 proc_create("lcd", S_IRUGO | S_IWUSR, toshiba_proc_dir, &lcd_proc_fops);
650 ProcItem *item; 691 proc_create("video", S_IRUGO | S_IWUSR, toshiba_proc_dir, &video_proc_fops);
651 692 proc_create("fan", S_IRUGO | S_IWUSR, toshiba_proc_dir, &fan_proc_fops);
652 for (item = proc_items; item->name; ++item) { 693 proc_create("keys", S_IRUGO | S_IWUSR, toshiba_proc_dir, &keys_proc_fops);
653 proc = create_proc_read_entry(item->name, 694 proc_create("version", S_IRUGO, toshiba_proc_dir, &version_proc_fops);
654 S_IFREG | S_IRUGO | S_IWUSR,
655 toshiba_proc_dir,
656 (read_proc_t *) dispatch_read,
657 item);
658 if (proc && item->write_func)
659 proc->write_proc = (write_proc_t *) dispatch_write;
660 }
661 695
662 return AE_OK; 696 return AE_OK;
663} 697}
664 698
665static acpi_status remove_device(void) 699static acpi_status remove_device(void)
666{ 700{
667 ProcItem *item; 701 remove_proc_entry("lcd", toshiba_proc_dir);
668 702 remove_proc_entry("video", toshiba_proc_dir);
669 for (item = proc_items; item->name; ++item) 703 remove_proc_entry("fan", toshiba_proc_dir);
670 remove_proc_entry(item->name, toshiba_proc_dir); 704 remove_proc_entry("keys", toshiba_proc_dir);
705 remove_proc_entry("version", toshiba_proc_dir);
671 return AE_OK; 706 return AE_OK;
672} 707}
673 708