1 files changed, 157 insertions, 0 deletions
diff --git a/drivers/video/backlight/locomolcd.c b/drivers/video/backlight/locomolcd.c
new file mode 100644
index 00000000000..ada6e75eb04
--- /dev/null
+++ b/drivers/video/backlight/locomolcd.c
@@ -0,0 +1,157 @@
+/*
+ * Backlight control code for Sharp Zaurus SL-5500
+ *
+ * Copyright 2005 John Lenz <lenz@cs.wisc.edu>
+ * Maintainer: Pavel Machek <pavel@suse.cz> (unless John wants to :-)
+ * GPL v2
+ *
+ * This driver assumes single CPU. That's okay, because collie is
+ * slightly old hardware, and noone is going to retrofit second CPU to
+ * old PDA.
+ */
+
+/* LCD power functions */
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/interrupt.h>
+
+#include <asm/hardware/locomo.h>
+#include <asm/irq.h>
+
+#ifdef CONFIG_SA1100_COLLIE
+#include <asm/arch/collie.h>
+#else
+#include <asm/arch/poodle.h>
+#endif
+
+extern void (*sa1100fb_lcd_power)(int on);
+
+static struct locomo_dev *locomolcd_dev;
+
+static void locomolcd_on(int comadj)
+{
+	locomo_gpio_set_dir(locomolcd_dev, LOCOMO_GPIO_LCD_VSHA_ON, 0);
+	locomo_gpio_write(locomolcd_dev, LOCOMO_GPIO_LCD_VSHA_ON, 1);
+	mdelay(2);
+
+	locomo_gpio_set_dir(locomolcd_dev, LOCOMO_GPIO_LCD_VSHD_ON, 0);
+	locomo_gpio_write(locomolcd_dev, LOCOMO_GPIO_LCD_VSHD_ON, 1);
+	mdelay(2);
+
+	locomo_m62332_senddata(locomolcd_dev, comadj, 0);
+	mdelay(5);
+
+	locomo_gpio_set_dir(locomolcd_dev, LOCOMO_GPIO_LCD_VEE_ON, 0);
+	locomo_gpio_write(locomolcd_dev, LOCOMO_GPIO_LCD_VEE_ON, 1);
+	mdelay(10);
+
+	/* TFTCRST | CPSOUT=0 | CPSEN */
+	locomo_writel(0x01, locomolcd_dev->mapbase + LOCOMO_TC);
+
+	/* Set CPSD */
+	locomo_writel(6, locomolcd_dev->mapbase + LOCOMO_CPSD);
+
+	/* TFTCRST | CPSOUT=0 | CPSEN */
+	locomo_writel((0x04 | 0x01), locomolcd_dev->mapbase + LOCOMO_TC);
+	mdelay(10);
+
+	locomo_gpio_set_dir(locomolcd_dev, LOCOMO_GPIO_LCD_MOD, 0);
+	locomo_gpio_write(locomolcd_dev, LOCOMO_GPIO_LCD_MOD, 1);
+}
+
+static void locomolcd_off(int comadj)
+{
+	/* TFTCRST=1 | CPSOUT=1 | CPSEN = 0 */
+	locomo_writel(0x06, locomolcd_dev->mapbase + LOCOMO_TC);
+	mdelay(1);
+
+	locomo_gpio_write(locomolcd_dev, LOCOMO_GPIO_LCD_VSHA_ON, 0);
+	mdelay(110);
+
+	locomo_gpio_write(locomolcd_dev, LOCOMO_GPIO_LCD_VEE_ON, 0);
+	mdelay(700);
+
+	/* TFTCRST=0 | CPSOUT=0 | CPSEN = 0 */
+	locomo_writel(0, locomolcd_dev->mapbase + LOCOMO_TC);
+	locomo_gpio_write(locomolcd_dev, LOCOMO_GPIO_LCD_MOD, 0);
+	locomo_gpio_write(locomolcd_dev, LOCOMO_GPIO_LCD_VSHD_ON, 0);
+}
+
+void locomolcd_power(int on)
+{
+	int comadj = 118;
+	unsigned long flags;
+
+	local_irq_save(flags);
+
+	if (!locomolcd_dev) {
+		local_irq_restore(flags);
+		return;
+	}
+
+	/* read comadj */
+#ifdef CONFIG_MACH_POODLE
+	comadj = 118;
+#else
+	comadj = 128;
+#endif
+
+	if (on)
+		locomolcd_on(comadj);
+	else
+		locomolcd_off(comadj);
+
+	local_irq_restore(flags);
+}
+EXPORT_SYMBOL(locomolcd_power);
+
+static int poodle_lcd_probe(struct locomo_dev *dev)
+{
+	unsigned long flags;
+
+	local_irq_save(flags);
+	locomolcd_dev = dev;
+
+	/* the poodle_lcd_power function is called for the first time
+	 * from fs_initcall, which is before locomo is activated.
+	 * We need to recall poodle_lcd_power here*/
+#ifdef CONFIG_MACH_POODLE
+	locomolcd_power(1);
+#endif
+	local_irq_restore(flags);
+	return 0;
+}
+
+static int poodle_lcd_remove(struct locomo_dev *dev)
+{
+	unsigned long flags;
+	local_irq_save(flags);
+	locomolcd_dev = NULL;
+	local_irq_restore(flags);
+	return 0;
+}
+
+static struct locomo_driver poodle_lcd_driver = {
+	.drv = {
+		.name = "locomo-backlight",
+	},
+	.devid	= LOCOMO_DEVID_BACKLIGHT,
+	.probe	= poodle_lcd_probe,
+	.remove	= poodle_lcd_remove,
+};
+
+static int __init poodle_lcd_init(void)
+{
+	int ret = locomo_driver_register(&poodle_lcd_driver);
+	if (ret) return ret;
+
+#ifdef CONFIG_SA1100_COLLIE
+	sa1100fb_lcd_power = locomolcd_power;
+#endif
+	return 0;
+}
+device_initcall(poodle_lcd_init);
+