161 lines
3.9 KiB
C
161 lines
3.9 KiB
C
/*
|
|
* 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>
|
|
|
|
#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 const struct backlight_ops progearbl_ops = {
|
|
.get_brightness = progearbl_get_intensity,
|
|
.update_status = progearbl_set_intensity,
|
|
};
|
|
|
|
static int progearbl_probe(struct platform_device *pdev)
|
|
{
|
|
struct backlight_properties props;
|
|
u8 temp;
|
|
struct backlight_device *progear_backlight_device;
|
|
int ret;
|
|
|
|
pmu_dev = pci_get_device(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M7101, NULL);
|
|
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, NULL);
|
|
if (!sb_dev) {
|
|
printk("ALI 1533 SB not found.\n");
|
|
ret = -ENODEV;
|
|
goto put_pmu;
|
|
}
|
|
|
|
/* 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);
|
|
|
|
memset(&props, 0, sizeof(struct backlight_properties));
|
|
props.type = BACKLIGHT_RAW;
|
|
props.max_brightness = HW_LEVEL_MAX - HW_LEVEL_MIN;
|
|
progear_backlight_device = backlight_device_register("progear-bl",
|
|
&pdev->dev, NULL,
|
|
&progearbl_ops,
|
|
&props);
|
|
if (IS_ERR(progear_backlight_device)) {
|
|
ret = PTR_ERR(progear_backlight_device);
|
|
goto put_sb;
|
|
}
|
|
|
|
platform_set_drvdata(pdev, progear_backlight_device);
|
|
|
|
progear_backlight_device->props.power = FB_BLANK_UNBLANK;
|
|
progear_backlight_device->props.brightness = HW_LEVEL_MAX - HW_LEVEL_MIN;
|
|
progearbl_set_intensity(progear_backlight_device);
|
|
|
|
return 0;
|
|
put_sb:
|
|
pci_dev_put(sb_dev);
|
|
put_pmu:
|
|
pci_dev_put(pmu_dev);
|
|
return ret;
|
|
}
|
|
|
|
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)
|
|
return ret;
|
|
progearbl_device = platform_device_register_simple("progear-bl", -1,
|
|
NULL, 0);
|
|
if (IS_ERR(progearbl_device)) {
|
|
platform_driver_unregister(&progearbl_driver);
|
|
return PTR_ERR(progearbl_device);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
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");
|