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Commit 7a208463 authored by Marcin Juszkiewicz's avatar Marcin Juszkiewicz Committed by Richard Purdie
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backlight: Add Frontpath ProGear HX1050+ driver 

Add control of LCD backlight for Frontpath ProGear HX1050+.
Patch is based on http://downloads.sf.net/progear/progear-lcd-0.2.tar.gz


driver by M Schacht.

Signed-off-by: default avatarMarcin Juszkiewicz <openembedded@hrw.one.pl>
Signed-off-by: default avatarRichard Purdie <rpurdie@rpsys.net>
parent 300abeb5

drivers/video/backlight/Kconfig

+8 −0
Original line number Diff line number Diff line
@@ -66,3 +66,11 @@ config BACKLIGHT_HP680 
	  If you have a HP Jornada 680, say y to enable the

	  backlight driver.



config BACKLIGHT_PROGEAR

	tristate "Frontpath ProGear Backlight Driver"

	depends on BACKLIGHT_DEVICE && PCI && X86

	default n

	help

	  If you have a Frontpath ProGear say Y to enable the

	  backlight driver.

drivers/video/backlight/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -5,3 +5,4 @@ obj-$(CONFIG_BACKLIGHT_CLASS_DEVICE) += backlight.o 
obj-$(CONFIG_BACKLIGHT_CORGI)	+= corgi_bl.o

obj-$(CONFIG_BACKLIGHT_HP680)	+= hp680_bl.o

obj-$(CONFIG_BACKLIGHT_LOCOMO)	+= locomolcd.o

obj-$(CONFIG_BACKLIGHT_PROGEAR) += progear_bl.o

drivers/video/backlight/progear_bl.c

0 → 100644
+154 −0
Original line number Diff line number Diff line 
/*

 *  Backlight Driver for Frontpath ProGear HX1050+

 *

 *  Copyright (c) 2006 Marcin Juszkiewicz

 *

 *  Based on Progear LCD driver by M Schacht

 *  <mschacht at alumni dot washington dot edu>

 *

 *  Based on Sharp's Corgi Backlight Driver

 *  Based on Backlight Driver for HP Jornada 680

 *

 *  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 <linux/module.h>

#include <linux/kernel.h>

#include <linux/init.h>

#include <linux/platform_device.h>

#include <linux/mutex.h>

#include <linux/fb.h>

#include <linux/backlight.h>

#include <linux/pci.h>

#include <asm/uaccess.h>



#define PMU_LPCR               0xB0

#define SB_MPS1                0x61

#define HW_LEVEL_MAX           0x77

#define HW_LEVEL_MIN           0x4f



static struct pci_dev *pmu_dev = NULL;

static struct pci_dev *sb_dev = NULL;



static int progearbl_set_intensity(struct backlight_device *bd)

{

	int intensity = bd->props->brightness;



	if (bd->props->power != FB_BLANK_UNBLANK)

		intensity = 0;

	if (bd->props->fb_blank != FB_BLANK_UNBLANK)

		intensity = 0;



	pci_write_config_byte(pmu_dev, PMU_LPCR, intensity + HW_LEVEL_MIN);



	return 0;

}



static int progearbl_get_intensity(struct backlight_device *bd)

{

	u8 intensity;

	pci_read_config_byte(pmu_dev, PMU_LPCR, &intensity);



	return intensity - HW_LEVEL_MIN;

}



static struct backlight_properties progearbl_data = {

	.owner = THIS_MODULE,

	.get_brightness = progearbl_get_intensity,

	.update_status = progearbl_set_intensity,

};



static int progearbl_probe(struct platform_device *pdev)

{

	u8 temp;

	struct backlight_device *progear_backlight_device;



	pmu_dev = pci_get_device(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M7101, 0);

	if (!pmu_dev) {

		printk("ALI M7101 PMU not found.\n");

		return -ENODEV;

	}



	sb_dev = pci_get_device(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M1533, 0);

	if (!sb_dev) {

		printk("ALI 1533 SB not found.\n");

		pci_dev_put(pmu_dev);

		return -ENODEV;

	}



	/*     Set SB_MPS1 to enable brightness control. */

	pci_read_config_byte(sb_dev, SB_MPS1, &temp);

	pci_write_config_byte(sb_dev, SB_MPS1, temp | 0x20);



	progear_backlight_device = backlight_device_register("progear-bl",

							     &pdev->dev, NULL,

							     &progearbl_data);

	if (IS_ERR(progear_backlight_device))

		return PTR_ERR(progear_backlight_device);



	platform_set_drvdata(pdev, progear_backlight_device);



	progearbl_data.power = FB_BLANK_UNBLANK;

	progearbl_data.brightness = HW_LEVEL_MAX - HW_LEVEL_MIN;

	progearbl_data.max_brightness = HW_LEVEL_MAX - HW_LEVEL_MIN;

	progearbl_set_intensity(progear_backlight_device);



	return 0;

}



static int progearbl_remove(struct platform_device *pdev)

{

	struct backlight_device *bd = platform_get_drvdata(pdev);

	backlight_device_unregister(bd);



	return 0;

}



static struct platform_driver progearbl_driver = {

	.probe = progearbl_probe,

	.remove = progearbl_remove,

	.driver = {

		   .name = "progear-bl",

		   },

};



static struct platform_device *progearbl_device;



static int __init progearbl_init(void)

{

	int ret = platform_driver_register(&progearbl_driver);



	if (!ret) {

		progearbl_device = platform_device_alloc("progear-bl", -1);

		if (!progearbl_device)

			return -ENOMEM;



		ret = platform_device_add(progearbl_device);



		if (ret) {

			platform_device_put(progearbl_device);

			platform_driver_unregister(&progearbl_driver);

		}

	}



	return ret;

}



static void __exit progearbl_exit(void)

{

	pci_dev_put(pmu_dev);

	pci_dev_put(sb_dev);



	platform_device_unregister(progearbl_device);

	platform_driver_unregister(&progearbl_driver);

}



module_init(progearbl_init);

module_exit(progearbl_exit);



MODULE_AUTHOR("Marcin Juszkiewicz <linux@hrw.one.pl>");

MODULE_DESCRIPTION("ProGear Backlight Driver");

MODULE_LICENSE("GPL");