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: Marcin Juszkiewicz <openembedded@hrw.one.pl>
Signed-off-by: Richard Purdie <rpurdie@rpsys.net>

diff --git a/drivers/video/backlight/Kconfig b/drivers/video/backlight/Kconfig
index 02f15297a021b1c7902137ee09bed8355e62f412..cda32399c039903873dfafbb627dd81e31e67e9c 100644 (file)
--- a/drivers/video/backlight/Kconfig
+++ b/drivers/video/backlight/Kconfig
@@ -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.
+

diff --git a/drivers/video/backlight/Makefile b/drivers/video/backlight/Makefile
index 65e5553fc849fed5bcbadb287640313bdfa09b97..0c3ce46f50949d17971d91dfa8b92f8441aa92a3 100644 (file)
--- a/drivers/video/backlight/Makefile
+++ b/drivers/video/backlight/Makefile
@@ -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

diff --git a/drivers/video/backlight/progear_bl.c b/drivers/video/backlight/progear_bl.c
new file mode 100644 (file)
index 0000000..13d831d
--- /dev/null
+++ b/drivers/video/backlight/progear_bl.c
@@ -0,0 +1,154 @@
+/*
+ *  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");