backlight: Add HP Jornada 700 series LCD driver (9e124435) · Commits · 方亚芬 / linux

drivers/video/backlight/Kconfig

+9 −0

Original line number	Diff line number	Diff line
		@@ -84,6 +84,15 @@ config LCD_TOSA
		If you have an Sharp SL-6000 Zaurus say Y to enable a driver
		for its LCD.

		config LCD_HP700
		tristate "HP Jornada 700 series LCD Driver"
		depends on LCD_CLASS_DEVICE
		depends on SA1100_JORNADA720_SSP && !PREEMPT
		default y
		help
		If you have an HP Jornada 700 series handheld (710/720/728)
		say Y to enable LCD control driver.

		#
		# Backlight
		#

drivers/video/backlight/Makefile

+1 −0

Original line number	Diff line number	Diff line
		@@ -2,6 +2,7 @@

		obj-$(CONFIG_LCD_CLASS_DEVICE) += lcd.o
		obj-$(CONFIG_LCD_CORGI) += corgi_lcd.o
		obj-$(CONFIG_LCD_HP700) += jornada720_lcd.o
		obj-$(CONFIG_LCD_LTV350QV) += ltv350qv.o
		obj-$(CONFIG_LCD_ILI9320) += ili9320.o
		obj-$(CONFIG_LCD_PLATFORM) += platform_lcd.o

drivers/video/backlight/jornada720_lcd.c

0 → 100644

+153 −0

Original line number	Diff line number	Diff line
		/*
		*
		* LCD driver for HP Jornada 700 series (710/720/728)
		* Copyright (C) 2006-2009 Kristoffer Ericson <kristoffer.ericson@gmail.com>
		*
		* This program is free software; you can redistribute it and/or
		* modify it under the terms of the GNU General Public License version
		* 2 or any later version as published by the Free Software Foundation.
		*
		*/

		#include <linux/device.h>
		#include <linux/fb.h>
		#include <linux/kernel.h>
		#include <linux/lcd.h>
		#include <linux/module.h>
		#include <linux/platform_device.h>
		#include <linux/delay.h>

		#include <mach/jornada720.h>
		#include <mach/hardware.h>

		#include <video/s1d13xxxfb.h>

		#define LCD_MAX_CONTRAST 0xff
		#define LCD_DEF_CONTRAST 0x80

		static int jornada_lcd_get_power(struct lcd_device *dev)
		{
		/* LDD2 in PPC = LCD POWER */
		if (PPSR & PPC_LDD2)
		return FB_BLANK_UNBLANK; /* PW ON */
		else
		return FB_BLANK_POWERDOWN; /* PW OFF */
		}

		static int jornada_lcd_get_contrast(struct lcd_device *dev)
		{
		int ret;

		if (jornada_lcd_get_power(dev) != FB_BLANK_UNBLANK)
		return 0;

		jornada_ssp_start();

		if (jornada_ssp_byte(GETCONTRAST) != TXDUMMY) {
		printk(KERN_ERR "lcd: get contrast failed\n");
		jornada_ssp_end();
		return -ETIMEDOUT;
		} else {
		ret = jornada_ssp_byte(TXDUMMY);
		jornada_ssp_end();
		return ret;
		}
		}

		static int jornada_lcd_set_contrast(struct lcd_device *dev, int value)
		{
		int ret;

		jornada_ssp_start();

		/* start by sending our set contrast cmd to mcu */
		ret = jornada_ssp_byte(SETCONTRAST);

		/* push the new value */
		if (jornada_ssp_byte(value) != TXDUMMY) {
		printk(KERN_ERR "lcd : set contrast failed\n");
		jornada_ssp_end();
		return -ETIMEDOUT;
		}

		/* if we get here we can assume everything went well */
		jornada_ssp_end();

		return 0;
		}

		static int jornada_lcd_set_power(struct lcd_device *dev, int power)
		{
		if (power != FB_BLANK_UNBLANK) {
		PPSR &= ~PPC_LDD2;
		PPDR \|= PPC_LDD2;
		} else
		PPSR \|= PPC_LDD2;

		return 0;
		}

		static struct lcd_ops jornada_lcd_props = {
		.get_contrast = jornada_lcd_get_contrast,
		.set_contrast = jornada_lcd_set_contrast,
		.get_power = jornada_lcd_get_power,
		.set_power = jornada_lcd_set_power,
		};

		static int jornada_lcd_probe(struct platform_device *pdev)
		{
		struct lcd_device *lcd_device;
		int ret;

		lcd_device = lcd_device_register(S1D_DEVICENAME, &pdev->dev, NULL, &jornada_lcd_props);

		if (IS_ERR(lcd_device)) {
		ret = PTR_ERR(lcd_device);
		printk(KERN_ERR "lcd : failed to register device\n");
		return ret;
		}

		platform_set_drvdata(pdev, lcd_device);

		/* lets set our default values */
		jornada_lcd_set_contrast(lcd_device, LCD_DEF_CONTRAST);
		jornada_lcd_set_power(lcd_device, FB_BLANK_UNBLANK);
		/* give it some time to startup */
		msleep(100);

		return 0;
		}

		static int jornada_lcd_remove(struct platform_device *pdev)
		{
		struct lcd_device *lcd_device = platform_get_drvdata(pdev);

		lcd_device_unregister(lcd_device);

		return 0;
		}

		static struct platform_driver jornada_lcd_driver = {
		.probe = jornada_lcd_probe,
		.remove = jornada_lcd_remove,
		.driver = {
		.name = "jornada_lcd",
		},
		};

		int __init jornada_lcd_init(void)
		{
		return platform_driver_register(&jornada_lcd_driver);
		}

		void __exit jornada_lcd_exit(void)
		{
		platform_driver_unregister(&jornada_lcd_driver);
		}

		MODULE_AUTHOR("Kristoffer Ericson <kristoffer.ericson@gmail.com>");
		MODULE_DESCRIPTION("HP Jornada 710/720/728 LCD driver");
		MODULE_LICENSE("GPL");

		module_init(jornada_lcd_init);
		module_exit(jornada_lcd_exit);