LXR linux/drivers/leds/leds-hp6xx.c

   1/*
   2 * LED Triggers Core
   3 * For the HP Jornada 620/660/680/690 handhelds
   4 *
   5 * Copyright 2008 Kristoffer Ericson <kristoffer.ericson@gmail.com>
   6 *     this driver is based on leds-spitz.c by Richard Purdie.
   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 version 2 as
  10 * published by the Free Software Foundation.
  11 */
  12
  13#include <linux/module.h>
  14#include <linux/kernel.h>
  15#include <linux/init.h>
  16#include <linux/platform_device.h>
  17#include <linux/leds.h>
  18#include <asm/hd64461.h>
  19#include <mach/hp6xx.h>
  20
  21static void hp6xxled_green_set(struct led_classdev *led_cdev,
  22                               enum led_brightness value)
  23{
  24        u8 v8;
  25
  26        v8 = inb(PKDR);
  27        if (value)
  28                outb(v8 & (~PKDR_LED_GREEN), PKDR);
  29        else
  30                outb(v8 | PKDR_LED_GREEN, PKDR);
  31}
  32
  33static void hp6xxled_red_set(struct led_classdev *led_cdev,
  34                             enum led_brightness value)
  35{
  36        u16 v16;
  37
  38        v16 = inw(HD64461_GPBDR);
  39        if (value)
  40                outw(v16 & (~HD64461_GPBDR_LED_RED), HD64461_GPBDR);
  41        else
  42                outw(v16 | HD64461_GPBDR_LED_RED, HD64461_GPBDR);
  43}
  44
  45static struct led_classdev hp6xx_red_led = {
  46        .name                   = "hp6xx:red",
  47        .default_trigger        = "hp6xx-charge",
  48        .brightness_set         = hp6xxled_red_set,
  49        .flags                  = LED_CORE_SUSPENDRESUME,
  50};
  51
  52static struct led_classdev hp6xx_green_led = {
  53        .name                   = "hp6xx:green",
  54        .default_trigger        = "ide-disk",
  55        .brightness_set         = hp6xxled_green_set,
  56        .flags                  = LED_CORE_SUSPENDRESUME,
  57};
  58
  59static int hp6xxled_probe(struct platform_device *pdev)
  60{
  61        int ret;
  62
  63        ret = led_classdev_register(&pdev->dev, &hp6xx_red_led);
  64        if (ret < 0)
  65                return ret;
  66
  67        ret = led_classdev_register(&pdev->dev, &hp6xx_green_led);
  68        if (ret < 0)
  69                led_classdev_unregister(&hp6xx_red_led);
  70
  71        return ret;
  72}
  73
  74static int hp6xxled_remove(struct platform_device *pdev)
  75{
  76        led_classdev_unregister(&hp6xx_red_led);
  77        led_classdev_unregister(&hp6xx_green_led);
  78
  79        return 0;
  80}
  81
  82/* work with hotplug and coldplug */
  83MODULE_ALIAS("platform:hp6xx-led");
  84
  85static struct platform_driver hp6xxled_driver = {
  86        .probe          = hp6xxled_probe,
  87        .remove         = hp6xxled_remove,
  88        .driver         = {
  89                .name           = "hp6xx-led",
  90                .owner          = THIS_MODULE,
  91        },
  92};
  93
  94static int __init hp6xxled_init(void)
  95{
  96        return platform_driver_register(&hp6xxled_driver);
  97}
  98
  99static void __exit hp6xxled_exit(void)
 100{
 101        platform_driver_unregister(&hp6xxled_driver);
 102}
 103
 104module_init(hp6xxled_init);
 105module_exit(hp6xxled_exit);
 106
 107MODULE_AUTHOR("Kristoffer Ericson <kristoffer.ericson@gmail.com>");
 108MODULE_DESCRIPTION("HP Jornada 6xx LED driver");
 109MODULE_LICENSE("GPL");
 110