From a66e34fefb3f8142d7f16808563eb610225f6e77 Mon Sep 17 00:00:00 2001 From: Rod Whitby Date: Tue, 29 Jan 2008 23:17:42 +1030 Subject: [PATCH] leds: Add new driver for the LEDs on the Freecom FSG-3 The LEDs on the Freecom FSG-3 are connected to an external memory-mapped latch on the ixp4xx expansion bus, and therefore cannot be supported by any of the existing LEDs drivers. Signed-off-by: Rod Whitby -- PATCH FOLLOWS KernelVersion: v2.6.25-rc6-117-g457fb60 --- drivers/leds/Kconfig | 6 + drivers/leds/Makefile | 1 + drivers/leds/leds-fsg.c | 261 +++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 268 insertions(+), 0 deletions(-) create mode 100644 drivers/leds/leds-fsg.c Index: linux-2.6.25.1/drivers/leds/Kconfig =================================================================== --- linux-2.6.25.1.orig/drivers/leds/Kconfig +++ linux-2.6.25.1/drivers/leds/Kconfig @@ -46,6 +46,12 @@ config LEDS_SPITZ This option enables support for the LEDs on Sharp Zaurus SL-Cxx00 series (C1000, C3000, C3100). +config LEDS_FSG + tristate "LED Support for the Freecom FSG-3" + depends on LEDS_CLASS && MACH_FSG + help + This option enables support for the LEDs on the Freecom FSG-3. + config LEDS_TOSA tristate "LED Support for the Sharp SL-6000 series" depends on LEDS_CLASS && PXA_SHARPSL Index: linux-2.6.25.1/drivers/leds/Makefile =================================================================== --- linux-2.6.25.1.orig/drivers/leds/Makefile +++ linux-2.6.25.1/drivers/leds/Makefile @@ -22,6 +22,7 @@ obj-$(CONFIG_LEDS_GPIO) += leds-gpio.o obj-$(CONFIG_LEDS_CM_X270) += leds-cm-x270.o obj-$(CONFIG_LEDS_CLEVO_MAIL) += leds-clevo-mail.o obj-$(CONFIG_LEDS_HP6XX) += leds-hp6xx.o +obj-$(CONFIG_LEDS_FSG) += leds-fsg.o # LED Triggers obj-$(CONFIG_LEDS_TRIGGER_TIMER) += ledtrig-timer.o Index: linux-2.6.25.1/drivers/leds/leds-fsg.c =================================================================== --- /dev/null +++ linux-2.6.25.1/drivers/leds/leds-fsg.c @@ -0,0 +1,261 @@ +/* + * LED Driver for the Freecom FSG-3 + * + * Copyright (c) 2008 Rod Whitby + * + * Author: Rod Whitby + * + * Based on leds-spitz.c + * Copyright 2005-2006 Openedhand Ltd. + * Author: Richard Purdie + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + */ + +#include +#include +#include +#include +#include +#include + +static short __iomem *latch_address; +static unsigned short latch_value; + + +static void fsg_led_wlan_set(struct led_classdev *led_cdev, + enum led_brightness value) +{ + if (value) { + latch_value &= ~(1 << FSG_LED_WLAN_BIT); + *latch_address = latch_value; + } else { + latch_value |= (1 << FSG_LED_WLAN_BIT); + *latch_address = latch_value; + } +} + +static void fsg_led_wan_set(struct led_classdev *led_cdev, + enum led_brightness value) +{ + if (value) { + latch_value &= ~(1 << FSG_LED_WAN_BIT); + *latch_address = latch_value; + } else { + latch_value |= (1 << FSG_LED_WAN_BIT); + *latch_address = latch_value; + } +} + +static void fsg_led_sata_set(struct led_classdev *led_cdev, + enum led_brightness value) +{ + if (value) { + latch_value &= ~(1 << FSG_LED_SATA_BIT); + *latch_address = latch_value; + } else { + latch_value |= (1 << FSG_LED_SATA_BIT); + *latch_address = latch_value; + } +} + +static void fsg_led_usb_set(struct led_classdev *led_cdev, + enum led_brightness value) +{ + if (value) { + latch_value &= ~(1 << FSG_LED_USB_BIT); + *latch_address = latch_value; + } else { + latch_value |= (1 << FSG_LED_USB_BIT); + *latch_address = latch_value; + } +} + +static void fsg_led_sync_set(struct led_classdev *led_cdev, + enum led_brightness value) +{ + if (value) { + latch_value &= ~(1 << FSG_LED_SYNC_BIT); + *latch_address = latch_value; + } else { + latch_value |= (1 << FSG_LED_SYNC_BIT); + *latch_address = latch_value; + } +} + +static void fsg_led_ring_set(struct led_classdev *led_cdev, + enum led_brightness value) +{ + if (value) { + latch_value &= ~(1 << FSG_LED_RING_BIT); + *latch_address = latch_value; + } else { + latch_value |= (1 << FSG_LED_RING_BIT); + *latch_address = latch_value; + } +} + + + +static struct led_classdev fsg_wlan_led = { + .name = "fsg:blue:wlan", + .brightness_set = fsg_led_wlan_set, +}; + +static struct led_classdev fsg_wan_led = { + .name = "fsg:blue:wan", + .brightness_set = fsg_led_wan_set, +}; + +static struct led_classdev fsg_sata_led = { + .name = "fsg:blue:sata", + .brightness_set = fsg_led_sata_set, +}; + +static struct led_classdev fsg_usb_led = { + .name = "fsg:blue:usb", + .brightness_set = fsg_led_usb_set, +}; + +static struct led_classdev fsg_sync_led = { + .name = "fsg:blue:sync", + .brightness_set = fsg_led_sync_set, +}; + +static struct led_classdev fsg_ring_led = { + .name = "fsg:blue:ring", + .brightness_set = fsg_led_ring_set, +}; + + + +#ifdef CONFIG_PM +static int fsg_led_suspend(struct platform_device *dev, pm_message_t state) +{ + led_classdev_suspend(&fsg_wlan_led); + led_classdev_suspend(&fsg_wan_led); + led_classdev_suspend(&fsg_sata_led); + led_classdev_suspend(&fsg_usb_led); + led_classdev_suspend(&fsg_sync_led); + led_classdev_suspend(&fsg_ring_led); + return 0; +} + +static int fsg_led_resume(struct platform_device *dev) +{ + led_classdev_resume(&fsg_wlan_led); + led_classdev_resume(&fsg_wan_led); + led_classdev_resume(&fsg_sata_led); + led_classdev_resume(&fsg_usb_led); + led_classdev_resume(&fsg_sync_led); + led_classdev_resume(&fsg_ring_led); + return 0; +} +#endif + + +static int fsg_led_probe(struct platform_device *pdev) +{ + int ret; + + ret = led_classdev_register(&pdev->dev, &fsg_wlan_led); + if (ret < 0) + goto failwlan; + + ret = led_classdev_register(&pdev->dev, &fsg_wan_led); + if (ret < 0) + goto failwan; + + ret = led_classdev_register(&pdev->dev, &fsg_sata_led); + if (ret < 0) + goto failsata; + + ret = led_classdev_register(&pdev->dev, &fsg_usb_led); + if (ret < 0) + goto failusb; + + ret = led_classdev_register(&pdev->dev, &fsg_sync_led); + if (ret < 0) + goto failsync; + + ret = led_classdev_register(&pdev->dev, &fsg_ring_led); + if (ret < 0) + goto failring; + + /* Map the LED chip select address space */ + latch_address = (unsigned short *) ioremap(IXP4XX_EXP_BUS_BASE(2), 512); + if (!latch_address) { + ret = -ENOMEM; + goto failremap; + } + + latch_value = 0xffff; + *latch_address = latch_value; + + return ret; + + failremap: + led_classdev_unregister(&fsg_ring_led); + failring: + led_classdev_unregister(&fsg_sync_led); + failsync: + led_classdev_unregister(&fsg_usb_led); + failusb: + led_classdev_unregister(&fsg_sata_led); + failsata: + led_classdev_unregister(&fsg_wan_led); + failwan: + led_classdev_unregister(&fsg_wlan_led); + failwlan: + + return ret; +} + +static int fsg_led_remove(struct platform_device *pdev) +{ + iounmap(latch_address); + + led_classdev_unregister(&fsg_wlan_led); + led_classdev_unregister(&fsg_wan_led); + led_classdev_unregister(&fsg_sata_led); + led_classdev_unregister(&fsg_usb_led); + led_classdev_unregister(&fsg_sync_led); + led_classdev_unregister(&fsg_ring_led); + + return 0; +} + + +static struct platform_driver fsg_led_driver = { + .probe = fsg_led_probe, + .remove = fsg_led_remove, +#ifdef CONFIG_PM + .suspend = fsg_led_suspend, + .resume = fsg_led_resume, +#endif + .driver = { + .name = "fsg-led", + }, +}; + + +static int __init fsg_led_init(void) +{ + return platform_driver_register(&fsg_led_driver); +} + +static void __exit fsg_led_exit(void) +{ + platform_driver_unregister(&fsg_led_driver); +} + + +module_init(fsg_led_init); +module_exit(fsg_led_exit); + +MODULE_AUTHOR("Rod Whitby "); +MODULE_DESCRIPTION("Freecom FSG-3 LED driver"); +MODULE_LICENSE("GPL");