From 57f0f512b273f60d52568b8c6b77e17f5636edc0 Mon Sep 17 00:00:00 2001
From: André Fabian Silva Delgado <emulatorman@parabola.nu>
Date: Wed, 5 Aug 2015 17:04:01 -0300
Subject: Initial import

---
 drivers/video/backlight/jornada720_lcd.c | 131 +++++++++++++++++++++++++++++++
 1 file changed, 131 insertions(+)
 create mode 100644 drivers/video/backlight/jornada720_lcd.c

(limited to 'drivers/video/backlight/jornada720_lcd.c')

diff --git a/drivers/video/backlight/jornada720_lcd.c b/drivers/video/backlight/jornada720_lcd.c
new file mode 100644
index 000000000..dfa0fa0d5
--- /dev/null
+++ b/drivers/video/backlight/jornada720_lcd.c
@@ -0,0 +1,131 @@
+/*
+ *
+ * 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 *ld)
+{
+	return PPSR & PPC_LDD2 ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN;
+}
+
+static int jornada_lcd_get_contrast(struct lcd_device *ld)
+{
+	int ret;
+
+	if (jornada_lcd_get_power(ld) != FB_BLANK_UNBLANK)
+		return 0;
+
+	jornada_ssp_start();
+
+	if (jornada_ssp_byte(GETCONTRAST) == TXDUMMY) {
+		ret = jornada_ssp_byte(TXDUMMY);
+		goto success;
+	}
+
+	dev_err(&ld->dev, "failed to set contrast\n");
+	ret = -ETIMEDOUT;
+
+success:
+	jornada_ssp_end();
+	return ret;
+}
+
+static int jornada_lcd_set_contrast(struct lcd_device *ld, int value)
+{
+	int ret = 0;
+
+	jornada_ssp_start();
+
+	/* start by sending our set contrast cmd to mcu */
+	if (jornada_ssp_byte(SETCONTRAST) == TXDUMMY) {
+		/* if successful push the new value */
+		if (jornada_ssp_byte(value) == TXDUMMY)
+			goto success;
+	}
+
+	dev_err(&ld->dev, "failed to set contrast\n");
+	ret = -ETIMEDOUT;
+
+success:
+	jornada_ssp_end();
+	return ret;
+}
+
+static int jornada_lcd_set_power(struct lcd_device *ld, 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 = devm_lcd_device_register(&pdev->dev, S1D_DEVICENAME,
+					&pdev->dev, NULL, &jornada_lcd_props);
+
+	if (IS_ERR(lcd_device)) {
+		ret = PTR_ERR(lcd_device);
+		dev_err(&pdev->dev, "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 struct platform_driver jornada_lcd_driver = {
+	.probe	= jornada_lcd_probe,
+	.driver	= {
+		.name	= "jornada_lcd",
+	},
+};
+
+module_platform_driver(jornada_lcd_driver);
+
+MODULE_AUTHOR("Kristoffer Ericson <kristoffer.ericson@gmail.com>");
+MODULE_DESCRIPTION("HP Jornada 710/720/728 LCD driver");
+MODULE_LICENSE("GPL");
-- 
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