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| 1 | /* |
| 2 | * Copyright 2006 - Florian Fainelli <florian@openwrt.org> |
| 3 | * |
| 4 | * Control the Cobalt Qube/RaQ front LED |
| 5 | */ |
| 6 | #include <linux/init.h> |
| 7 | #include <linux/io.h> |
| 8 | #include <linux/ioport.h> |
| 9 | #include <linux/leds.h> |
| 10 | #include <linux/module.h> |
| 11 | #include <linux/platform_device.h> |
| 12 | #include <linux/types.h> |
| 13 | |
| 14 | #define LED_FRONT_LEFT 0x01 |
| 15 | #define LED_FRONT_RIGHT 0x02 |
| 16 | |
| 17 | static void __iomem *led_port; |
| 18 | static u8 led_value; |
| 19 | |
| 20 | static void qube_front_led_set(struct led_classdev *led_cdev, |
| 21 | enum led_brightness brightness) |
| 22 | { |
| 23 | if (brightness) |
| 24 | led_value = LED_FRONT_LEFT | LED_FRONT_RIGHT; |
| 25 | else |
| 26 | led_value = ~(LED_FRONT_LEFT | LED_FRONT_RIGHT); |
| 27 | writeb(led_value, led_port); |
| 28 | } |
| 29 | |
| 30 | static struct led_classdev qube_front_led = { |
| 31 | .name = "qube::front", |
| 32 | .brightness = LED_FULL, |
| 33 | .brightness_set = qube_front_led_set, |
| 34 | .default_trigger = "default-on", |
| 35 | }; |
| 36 | |
| 37 | static int __devinit cobalt_qube_led_probe(struct platform_device *pdev) |
| 38 | { |
| 39 | struct resource *res; |
| 40 | int retval; |
| 41 | |
| 42 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| 43 | if (!res) |
| 44 | return -EBUSY; |
| 45 | |
| 46 | led_port = ioremap(res->start, resource_size(res)); |
| 47 | if (!led_port) |
| 48 | return -ENOMEM; |
| 49 | |
| 50 | led_value = LED_FRONT_LEFT | LED_FRONT_RIGHT; |
| 51 | writeb(led_value, led_port); |
| 52 | |
| 53 | retval = led_classdev_register(&pdev->dev, &qube_front_led); |
| 54 | if (retval) |
| 55 | goto err_iounmap; |
| 56 | |
| 57 | return 0; |
| 58 | |
| 59 | err_iounmap: |
| 60 | iounmap(led_port); |
| 61 | led_port = NULL; |
| 62 | |
| 63 | return retval; |
| 64 | } |
| 65 | |
| 66 | static int __devexit cobalt_qube_led_remove(struct platform_device *pdev) |
| 67 | { |
| 68 | led_classdev_unregister(&qube_front_led); |
| 69 | |
| 70 | if (led_port) { |
| 71 | iounmap(led_port); |
| 72 | led_port = NULL; |
| 73 | } |
| 74 | |
| 75 | return 0; |
| 76 | } |
| 77 | |
| 78 | static struct platform_driver cobalt_qube_led_driver = { |
| 79 | .probe = cobalt_qube_led_probe, |
| 80 | .remove = __devexit_p(cobalt_qube_led_remove), |
| 81 | .driver = { |
| 82 | .name = "cobalt-qube-leds", |
| 83 | .owner = THIS_MODULE, |
| 84 | }, |
| 85 | }; |
| 86 | |
| 87 | module_platform_driver(cobalt_qube_led_driver); |
| 88 | |
| 89 | MODULE_LICENSE("GPL"); |
| 90 | MODULE_DESCRIPTION("Front LED support for Cobalt Server"); |
| 91 | MODULE_AUTHOR("Florian Fainelli <florian@openwrt.org>"); |
| 92 | MODULE_ALIAS("platform:cobalt-qube-leds"); |
| 93 |
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Tags:
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