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173 lines
3.5 KiB
C
173 lines
3.5 KiB
C
/*
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* LEDs driver for PCEngines ALIX 2/3 series
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*
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* Copyright (C) 2007 Petr Liebman
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*
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* Based on leds-wrap.c
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/platform_device.h>
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#include <linux/leds.h>
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#include <linux/err.h>
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#include <asm/io.h>
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#define DRVNAME "alix-led"
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#define ALIX_LED1_PORT (0x6100)
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#define ALIX_LED1_ON (1<<22)
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#define ALIX_LED1_OFF (1<<6)
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#define ALIX_LED2_PORT (0x6180)
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#define ALIX_LED2_ON (1<<25)
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#define ALIX_LED2_OFF (1<<9)
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#define ALIX_LED3_PORT (0x6180)
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#define ALIX_LED3_ON (1<<27)
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#define ALIX_LED3_OFF (1<<11)
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static struct platform_device *pdev;
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static void alix_led_set_1(struct led_classdev *led_cdev,
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enum led_brightness value)
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{
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if (value)
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outl(ALIX_LED1_ON, ALIX_LED1_PORT);
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else
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outl(ALIX_LED1_OFF, ALIX_LED1_PORT);
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}
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static void alix_led_set_2(struct led_classdev *led_cdev,
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enum led_brightness value)
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{
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if (value)
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outl(ALIX_LED2_ON, ALIX_LED2_PORT);
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else
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outl(ALIX_LED2_OFF, ALIX_LED2_PORT);
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}
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static void alix_led_set_3(struct led_classdev *led_cdev,
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enum led_brightness value)
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{
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if (value)
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outl(ALIX_LED3_ON, ALIX_LED3_PORT);
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else
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outl(ALIX_LED3_OFF, ALIX_LED3_PORT);
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}
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static struct led_classdev alix_led_1 = {
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.name = "alix:1",
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.brightness_set = alix_led_set_1,
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};
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static struct led_classdev alix_led_2 = {
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.name = "alix:2",
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.brightness_set = alix_led_set_2,
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};
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static struct led_classdev alix_led_3 = {
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.name = "alix:3",
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.brightness_set = alix_led_set_3,
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};
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#ifdef CONFIG_PM
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static int alix_led_suspend(struct platform_device *dev,
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pm_message_t state)
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{
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led_classdev_suspend(&alix_led_1);
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led_classdev_suspend(&alix_led_2);
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led_classdev_suspend(&alix_led_3);
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return 0;
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}
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static int alix_led_resume(struct platform_device *dev)
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{
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led_classdev_resume(&alix_led_1);
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led_classdev_resume(&alix_led_2);
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led_classdev_resume(&alix_led_3);
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return 0;
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}
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#else
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#define alix_led_suspend NULL
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#define alix_led_resume NULL
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#endif
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static int alix_led_probe(struct platform_device *pdev)
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{
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int ret;
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ret = led_classdev_register(&pdev->dev, &alix_led_1);
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if (ret >= 0)
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{
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ret = led_classdev_register(&pdev->dev, &alix_led_2);
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if (ret >= 0)
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{
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ret = led_classdev_register(&pdev->dev, &alix_led_3);
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if (ret < 0)
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led_classdev_unregister(&alix_led_2);
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}
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if (ret < 0)
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led_classdev_unregister(&alix_led_1);
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}
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return ret;
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}
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static int alix_led_remove(struct platform_device *pdev)
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{
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led_classdev_unregister(&alix_led_1);
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led_classdev_unregister(&alix_led_2);
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led_classdev_unregister(&alix_led_3);
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return 0;
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}
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static struct platform_driver alix_led_driver = {
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.probe = alix_led_probe,
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.remove = alix_led_remove,
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.suspend = alix_led_suspend,
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.resume = alix_led_resume,
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.driver = {
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.name = DRVNAME,
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.owner = THIS_MODULE,
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},
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};
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static int __init alix_led_init(void)
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{
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int ret;
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ret = platform_driver_register(&alix_led_driver);
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if (ret < 0)
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goto out;
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pdev = platform_device_register_simple(DRVNAME, -1, NULL, 0);
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if (IS_ERR(pdev)) {
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ret = PTR_ERR(pdev);
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platform_driver_unregister(&alix_led_driver);
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goto out;
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}
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out:
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return ret;
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}
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static void __exit alix_led_exit(void)
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{
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platform_device_unregister(pdev);
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platform_driver_unregister(&alix_led_driver);
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}
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module_init(alix_led_init);
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module_exit(alix_led_exit);
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MODULE_AUTHOR("Petr Liebman");
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MODULE_DESCRIPTION("PCEngines ALIX LED driver");
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MODULE_LICENSE("GPL");
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