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/* |
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* Backlight Driver for Frontpath ProGear HX1050+ |
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* |
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* Copyright (c) 2006 Marcin Juszkiewicz |
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* |
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* Based on Progear LCD driver by M Schacht |
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* <mschacht at alumni dot washington dot edu> |
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* |
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* Based on Sharp's Corgi Backlight Driver |
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* Based on Backlight Driver for HP Jornada 680 |
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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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*/ |
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|
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#include <linux/module.h> |
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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/mutex.h> |
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#include <linux/fb.h> |
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#include <linux/backlight.h> |
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#include <linux/pci.h> |
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|
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#define PMU_LPCR 0xB0 |
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#define SB_MPS1 0x61 |
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#define HW_LEVEL_MAX 0x77 |
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#define HW_LEVEL_MIN 0x4f |
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|
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static struct pci_dev *pmu_dev = NULL; |
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static struct pci_dev *sb_dev = NULL; |
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|
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static int progearbl_set_intensity(struct backlight_device *bd) |
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{ |
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int intensity = bd->props.brightness; |
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|
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if (bd->props.power != FB_BLANK_UNBLANK) |
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intensity = 0; |
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if (bd->props.fb_blank != FB_BLANK_UNBLANK) |
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intensity = 0; |
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|
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pci_write_config_byte(pmu_dev, PMU_LPCR, intensity + HW_LEVEL_MIN); |
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|
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return 0; |
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} |
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|
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static int progearbl_get_intensity(struct backlight_device *bd) |
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{ |
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u8 intensity; |
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pci_read_config_byte(pmu_dev, PMU_LPCR, &intensity); |
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|
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return intensity - HW_LEVEL_MIN; |
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} |
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|
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static struct backlight_ops progearbl_ops = { |
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.get_brightness = progearbl_get_intensity, |
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.update_status = progearbl_set_intensity, |
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}; |
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|
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static int progearbl_probe(struct platform_device *pdev) |
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{ |
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u8 temp; |
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struct backlight_device *progear_backlight_device; |
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|
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pmu_dev = pci_get_device(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M7101, NULL); |
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if (!pmu_dev) { |
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printk("ALI M7101 PMU not found.\n"); |
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return -ENODEV; |
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} |
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|
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sb_dev = pci_get_device(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M1533, NULL); |
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if (!sb_dev) { |
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printk("ALI 1533 SB not found.\n"); |
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pci_dev_put(pmu_dev); |
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return -ENODEV; |
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} |
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|
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/* Set SB_MPS1 to enable brightness control. */ |
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pci_read_config_byte(sb_dev, SB_MPS1, &temp); |
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pci_write_config_byte(sb_dev, SB_MPS1, temp | 0x20); |
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|
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progear_backlight_device = backlight_device_register("progear-bl", |
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&pdev->dev, NULL, |
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&progearbl_ops); |
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if (IS_ERR(progear_backlight_device)) |
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return PTR_ERR(progear_backlight_device); |
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|
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platform_set_drvdata(pdev, progear_backlight_device); |
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|
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progear_backlight_device->props.power = FB_BLANK_UNBLANK; |
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progear_backlight_device->props.brightness = HW_LEVEL_MAX - HW_LEVEL_MIN; |
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progear_backlight_device->props.max_brightness = HW_LEVEL_MAX - HW_LEVEL_MIN; |
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progearbl_set_intensity(progear_backlight_device); |
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|
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return 0; |
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} |
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|
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static int progearbl_remove(struct platform_device *pdev) |
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{ |
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struct backlight_device *bd = platform_get_drvdata(pdev); |
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backlight_device_unregister(bd); |
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|
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return 0; |
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} |
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|
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static struct platform_driver progearbl_driver = { |
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.probe = progearbl_probe, |
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.remove = progearbl_remove, |
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.driver = { |
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.name = "progear-bl", |
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}, |
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}; |
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|
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static struct platform_device *progearbl_device; |
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|
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static int __init progearbl_init(void) |
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{ |
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int ret = platform_driver_register(&progearbl_driver); |
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|
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if (ret) |
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return ret; |
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progearbl_device = platform_device_register_simple("progear-bl", -1, |
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NULL, 0); |
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if (IS_ERR(progearbl_device)) { |
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platform_driver_unregister(&progearbl_driver); |
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return PTR_ERR(progearbl_device); |
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} |
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|
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return 0; |
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} |
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|
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static void __exit progearbl_exit(void) |
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{ |
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pci_dev_put(pmu_dev); |
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pci_dev_put(sb_dev); |
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|
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platform_device_unregister(progearbl_device); |
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platform_driver_unregister(&progearbl_driver); |
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} |
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|
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module_init(progearbl_init); |
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module_exit(progearbl_exit); |
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|
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MODULE_AUTHOR("Marcin Juszkiewicz <linux@hrw.one.pl>"); |
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MODULE_DESCRIPTION("ProGear Backlight Driver"); |
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MODULE_LICENSE("GPL"); |
