path: root/target/linux/coldfire/patches/018-Add-SSD1289-TFT-LCD-framebuffer-driver-on-TWR-MCF544.patch

From c1de95e3a608c48b5576e32181480930d9106ac4 Mon Sep 17 00:00:00 2001
From: Alison Wang <b18965@freescale.com>
Date: Thu, 4 Aug 2011 09:59:44 +0800
Subject: [PATCH 18/52] Add SSD1289 TFT LCD framebuffer driver on TWR-MCF5441X

Add SSD1289 TFT LCD framebuffer driver on TWR-MCF5441X. Flexbus and spi
interfaces are both supported.

Signed-off-by: Alison Wang <b18965@freescale.com>
---
 arch/m68k/coldfire/m5441x/config.c     |    1 +
 arch/m68k/coldfire/m5441x/devices.c    |    1 +
 arch/m68k/include/asm/fsl-ssd1289-fb.h |   93 ++++
 drivers/video/Kconfig                  |   24 +
 drivers/video/Makefile                 |    1 +
 drivers/video/fsl-ssd1289-fb.c         |  791 ++++++++++++++++++++++++++++++++
 6 files changed, 911 insertions(+), 0 deletions(-)
 create mode 100644 arch/m68k/include/asm/fsl-ssd1289-fb.h
 create mode 100644 drivers/video/fsl-ssd1289-fb.c

--- a/arch/m68k/coldfire/m5441x/config.c
+++ b/arch/m68k/coldfire/m5441x/config.c
@@ -45,6 +45,7 @@
 #include <asm/mcf5441x_fbcs.h>
 #include <asm/mcf5441x_dtim.h>
 #include <asm/mcf5441x_xbs.h>
+#include <asm/fsl-ssd1289-fb.h>
 
 extern int get_irq_list(struct seq_file *p, void *v);
 extern char _text, _end;
--- a/arch/m68k/coldfire/m5441x/devices.c
+++ b/arch/m68k/coldfire/m5441x/devices.c
@@ -33,6 +33,7 @@
 #include <asm/mcfqspi.h>
 #include <asm/mcfdspi.h>
 #include <asm/cf_io.h>
+#include <asm/fsl-ssd1289-fb.h>
 
 /*
  * I2C: only support i2c0 module on m5441x platform
--- /dev/null
+++ b/arch/m68k/include/asm/fsl-ssd1289-fb.h
@@ -0,0 +1,93 @@
+/*
+ * Copyright (C) 2010-2011 Freescale Semiconductor, Inc. All Rights Reserved.
+ *
+ * Freescale MCF54418 SSD1289 TFT LCD framebuffer driver
+ *
+ * This program is free software; you can redistribute  it and/or modify it
+ * under  the terms of  the GNU General  Public License as published by the
+ * Free Software Foundation;  either version 2 of the  License, or (at your
+ * option) any later version.
+ */
+
+#ifndef __FSL_SSD1289_FB_H__
+#define __FSL_SSD1289_FB_H__
+
+#define SSD1289_REG_OSCILLATION		0x00
+#define SSD1289_REG_DRIVER_OUT_CTRL	0x01
+#define SSD1289_REG_LCD_DRIVE_AC	0x02
+#define SSD1289_REG_POWER_CTRL_1	0x03
+#define SSD1289_REG_COMPARE_1		0x05
+#define SSD1289_REG_COMPARE_2		0x06
+#define SSD1289_REG_DISPLAY_CTRL	0x07
+#define SSD1289_REG_FRAME_CYCLE		0x0b
+#define SSD1289_REG_POWER_CTRL_2	0x0c
+#define SSD1289_REG_POWER_CTRL_3	0x0d
+#define SSD1289_REG_POWER_CTRL_4	0x0e
+#define SSD1289_REG_GATE_SCAN_START	0x0f
+#define SSD1289_REG_SLEEP_MODE		0x10
+#define SSD1289_REG_ENTRY_MODE		0x11
+#define SSD1289_REG_OPT_SPEED_3		0x12
+#define SSD1289_REG_H_PORCH		0x16
+#define SSD1289_REG_V_PORCH		0x17
+#define SSD1289_REG_POWER_CTRL_5	0x1e
+#define SSD1289_REG_GDDRAM_DATA		0x22
+#define SSD1289_REG_WR_DATA_MASK_1	0x23
+#define SSD1289_REG_WR_DATA_MASK_2	0x24
+#define SSD1289_REG_FRAME_FREQUENCY	0x25
+#define SSD1289_REG_OPT_SPEED_1		0x28
+#define SSD1289_REG_OPT_SPEED_2		0x2f
+#define SSD1289_REG_GAMMA_CTRL_1	0x30
+#define SSD1289_REG_GAMMA_CTRL_2	0x31
+#define SSD1289_REG_GAMMA_CTRL_3	0x32
+#define SSD1289_REG_GAMMA_CTRL_4	0x33
+#define SSD1289_REG_GAMMA_CTRL_5	0x34
+#define SSD1289_REG_GAMMA_CTRL_6	0x35
+#define SSD1289_REG_GAMMA_CTRL_7	0x36
+#define SSD1289_REG_GAMMA_CTRL_8	0x37
+#define SSD1289_REG_GAMMA_CTRL_9	0x3a
+#define SSD1289_REG_GAMMA_CTRL_10	0x3b
+#define SSD1289_REG_V_SCROLL_CTRL_1	0x41
+#define SSD1289_REG_V_SCROLL_CTRL_2	0x42
+#define SSD1289_REG_H_RAM_ADR_POS	0x44
+#define SSD1289_REG_V_RAM_ADR_START	0x45
+#define SSD1289_REG_V_RAM_ADR_END	0x46
+#define SSD1289_REG_FIRST_WIN_START	0x48
+#define SSD1289_REG_FIRST_WIN_END	0x49
+#define SSD1289_REG_SECND_WIN_START	0x4a
+#define SSD1289_REG_SECND_WIN_END	0x4b
+#define SSD1289_REG_GDDRAM_X_ADDR	0x4e
+#define SSD1289_REG_GDDRAM_Y_ADDR	0x4f
+
+struct ssd1289 {
+	void __iomem *cmd;
+	void __iomem *data;
+} __packed;
+
+struct fsl_ssd1289_fb_info {
+	struct device *dev;
+	struct ssd1289 ssd1289_reg;
+	int openflag;
+	struct spi_device *spidev;
+
+	struct task_struct *task;
+	unsigned long pseudo_palette[16];
+};
+
+/* LCD description */
+struct fsl_ssd1289_fb_display {
+	/* Screen size */
+	unsigned short width;
+	unsigned short height;
+
+	/* Screen info */
+	unsigned short xres;
+	unsigned short yres;
+	unsigned short bpp;
+};
+
+#define FLEXBUS_LCD_CMD_ADDRESS		0xc0000000
+#define FLEXBUS_LCD_DATA_ADDRESS	0xc0010000
+
+#define SPI_LCD_BLOCK_SIZE		4096
+#define SPI_LCD_BLOCK_HALF_SIZE		2048
+#endif
--- a/drivers/video/Kconfig
+++ b/drivers/video/Kconfig
@@ -1980,6 +1980,30 @@ config FB_FSL_DIU
 	---help---
 	  Framebuffer driver for the Freescale SoC DIU
 
+config FB_FSL_SSD1289
+	tristate "SSD1289 TFT LCD (Freescale MCF54418)"
+	depends on FB && M5441X
+	select FB_CFB_FILLRECT
+	select FB_CFB_COPYAREA
+	select FB_CFB_IMAGEBLIT
+	select FB_SYS_FOPS
+	---help---
+	  This is the framebuffer device driver for a Solomon Systech 240RGBx320
+	  TFT LCD SSD1289.
+
+choice
+	prompt "SSD1289 LCD Controller Interface mode"
+	depends on FB_FSL_SSD1289
+
+config SSD1289_FLEXBUS_MODE
+	bool "SSD1289 LCD Controller Flexbus Interface mode"
+
+config SSD1289_SPI_MODE
+	bool "SSD1289 LCD Controller SPI Interface mode"
+	depends on SPI_DSPI && DSPI0
+
+endchoice
+
 config FB_W100
 	tristate "W100 frame buffer support"
 	depends on FB && ARCH_PXA
--- a/drivers/video/Makefile
+++ b/drivers/video/Makefile
@@ -120,6 +120,7 @@ obj-$(CONFIG_FB_IMX)              += imx
 obj-$(CONFIG_FB_S3C)		  += s3c-fb.o
 obj-$(CONFIG_FB_S3C2410)	  += s3c2410fb.o
 obj-$(CONFIG_FB_FSL_DIU)	  += fsl-diu-fb.o
+obj-$(CONFIG_FB_FSL_SSD1289)      += fsl-ssd1289-fb.o
 obj-$(CONFIG_FB_COBALT)           += cobalt_lcdfb.o
 obj-$(CONFIG_FB_PNX4008_DUM)	  += pnx4008/
 obj-$(CONFIG_FB_PNX4008_DUM_RGB)  += pnx4008/
--- /dev/null
+++ b/drivers/video/fsl-ssd1289-fb.c
@@ -0,0 +1,791 @@
+/*
+ * Copyright (C) 2010-2011 Freescale Semiconductor, Inc. All Rights Reserved.
+ *
+ * Freescale MCF54418 SSD1289 TFT LCD framebuffer driver
+ *
+ * Author: Alison Wang <b18965@freescale.com>
+ *         Jason Jin <Jason.jin@freescale.com>
+ *
+ * This program is free software; you can redistribute  it and/or modify it
+ * under  the terms of  the GNU General  Public License as published by the
+ * Free Software Foundation;  either version 2 of the  License, or (at your
+ * option) any later version.
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/mm.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+#include <linux/fb.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/dma-mapping.h>
+#include <linux/clk.h>
+#include <linux/uaccess.h>
+#include <linux/timer.h>
+#include <linux/kthread.h>
+#include <linux/spi/spi.h>
+
+#include <asm/mcf5441x_fbcs.h>
+#include <asm/mcf5441x_dspi.h>
+#include <asm/fsl-ssd1289-fb.h>
+#include <asm/mcf5441x_gpio.h>
+#include <asm/mcf5441x_ccm.h>
+#include <asm/mcf_edma.h>
+
+#ifdef CONFIG_PM
+#include <linux/pm.h>
+#endif
+
+#if defined(CONFIG_SSD1289_SPI_MODE)
+unsigned char spi_block_buffer[SPI_LCD_BLOCK_SIZE];
+
+static int ssd1289_spi_writeblock(struct fb_info *info,
+		unsigned char *daddr, int flag)
+{
+	struct fsl_ssd1289_fb_info *fbinfo = info->par;
+	struct spi_device *devtmp;
+	int i;
+
+	for (i = 0; i < SPI_LCD_BLOCK_SIZE; i++) {
+		if (i % 2 == 0)
+			spi_block_buffer[i] = 0x01;
+		else if (flag == 1)
+			spi_block_buffer[i] = *(daddr + (i >> 1));
+		else if (flag == 0)
+			spi_block_buffer[i] = 0;
+	}
+
+	devtmp = fbinfo->spidev;
+	spi_write(devtmp, (const unsigned char *)spi_block_buffer,
+			SPI_LCD_BLOCK_SIZE);
+	return 0;
+}
+
+static int ssd1289_spi_write(struct fb_info *info,
+		unsigned short value, unsigned int flag)
+{
+	struct fsl_ssd1289_fb_info *fbinfo = info->par;
+	struct spi_device *devtmp;
+	unsigned short tmpl;
+	unsigned short tmph;
+
+	devtmp = fbinfo->spidev;
+	if (flag == 1) {
+		/* D/C = 1 */
+		tmph = ((value >> 8) & 0xff) + 0x0100;
+		tmpl = (value & 0xff) + 0x0100;
+		spi_write(devtmp, (const u8 *)&tmph, sizeof(tmph));
+		spi_write(devtmp, (const u8 *)&tmpl, sizeof(tmpl));
+	} else {
+		/* D/C = 0 */
+		tmpl = (value & 0xff);
+		spi_write(devtmp, (const u8 *)&tmpl, sizeof(tmpl));
+	}
+	return 0;
+}
+#elif defined(CONFIG_SSD1289_FLEXBUS_MODE)
+static int ssd1289_flexbus_write(struct fb_info *info, unsigned short value,
+			unsigned int flag)
+{
+	struct fsl_ssd1289_fb_info *fbinfo = info->par;
+	void __iomem *cmd_addr, *data_addr;
+
+	cmd_addr = fbinfo->ssd1289_reg.cmd;
+	data_addr = fbinfo->ssd1289_reg.data;
+
+	if (flag == 0)
+		out_be16(cmd_addr, value);
+	else
+		out_be16(data_addr, value);
+
+	return 0;
+}
+#endif
+
+static int ssd1289_write(struct fb_info *info, unsigned short value,
+		unsigned int flag)
+{
+#if defined(CONFIG_SSD1289_FLEXBUS_MODE)
+	ssd1289_flexbus_write(info, value, flag);
+#elif defined(CONFIG_SSD1289_SPI_MODE)
+	ssd1289_spi_write(info, value, flag);
+#endif
+	return 0;
+}
+
+static void fsl_ssd1289_enable_lcd(struct fb_info *info)
+{
+	int i;
+
+#if defined(CONFIG_SSD1289_SPI_MODE)
+	int count;
+#elif defined(CONFIG_SSD1289_FLEXBUS_MODE)
+	/* GPIO configuration */
+	MCF_GPIO_PAR_BE = MCF_GPIO_PAR_BE_BE3_FB_A1 | MCF_GPIO_PAR_BE_BE2_FB_A0
+		| MCF_GPIO_PAR_BE_BE1_BE1 | MCF_GPIO_PAR_BE_BE0_BE0;
+	MCF_GPIO_PAR_CS |= MCF_GPIO_PAR_CS_CS0_CS0;
+#endif
+
+	ssd1289_write(info, SSD1289_REG_DISPLAY_CTRL, 0);
+	ssd1289_write(info, 0x0200, 1);
+
+	ssd1289_write(info, SSD1289_REG_OSCILLATION, 0);
+	ssd1289_write(info, 0x0000, 1);
+
+	mdelay(100);
+
+	/* turn on the oscillator */
+	ssd1289_write(info, SSD1289_REG_OSCILLATION, 0);
+	ssd1289_write(info, 0x0001, 1);
+
+	mdelay(100);
+	/* power control 1 */
+	ssd1289_write(info, SSD1289_REG_POWER_CTRL_1, 0);
+	ssd1289_write(info, 0xaeac, 1);
+
+	/* power control 2 */
+	ssd1289_write(info, SSD1289_REG_POWER_CTRL_2, 0);
+	ssd1289_write(info, 0x0007, 1);
+
+	/* power control 3 */
+	ssd1289_write(info, SSD1289_REG_POWER_CTRL_3, 0);
+	ssd1289_write(info, 0x000f, 1);
+
+	/* power control 4 */
+	ssd1289_write(info, SSD1289_REG_POWER_CTRL_4, 0);
+	ssd1289_write(info, 0x2900, 1);
+
+	/* power control 5 */
+	ssd1289_write(info, SSD1289_REG_POWER_CTRL_5, 0);
+	ssd1289_write(info, 0x00b3, 1);
+
+	mdelay(15);
+	/* driver output control */
+	ssd1289_write(info, SSD1289_REG_DRIVER_OUT_CTRL, 0);
+	ssd1289_write(info, 0x2b3f, 1);
+
+	/* lcd-driving-waveform control */
+	ssd1289_write(info, SSD1289_REG_LCD_DRIVE_AC, 0);
+	ssd1289_write(info, 0x0600, 1);
+
+	/* sleep mode */
+	ssd1289_write(info, SSD1289_REG_SLEEP_MODE, 0);
+	ssd1289_write(info, 0x0000, 1);
+
+	/* entry mode */
+	ssd1289_write(info, SSD1289_REG_ENTRY_MODE, 0);
+	ssd1289_write(info, 0x60a8, 1);
+
+	mdelay(15);
+	/* compare register */
+	ssd1289_write(info, SSD1289_REG_COMPARE_1, 0);
+	ssd1289_write(info, 0x0000, 1);
+
+	ssd1289_write(info, SSD1289_REG_COMPARE_2, 0);
+	ssd1289_write(info, 0x0000, 1);
+
+	/* horizontal porch */
+	ssd1289_write(info, SSD1289_REG_H_PORCH, 0);
+	ssd1289_write(info, 0xef1c, 1);
+
+	/* vertical porch */
+	ssd1289_write(info, SSD1289_REG_V_PORCH, 0);
+	ssd1289_write(info, 0x0003, 1);
+
+	/* display control */
+	ssd1289_write(info, SSD1289_REG_DISPLAY_CTRL, 0);
+	ssd1289_write(info, 0x0233, 1);
+
+	/* frame cycle control */
+	ssd1289_write(info, SSD1289_REG_FRAME_CYCLE, 0);
+	ssd1289_write(info, 0x5312, 1);
+
+	/* gate scan position */
+	ssd1289_write(info, SSD1289_REG_GATE_SCAN_START, 0);
+	ssd1289_write(info, 0x0000, 1);
+
+	mdelay(20);
+	/* vertical scroll control */
+	ssd1289_write(info, SSD1289_REG_V_SCROLL_CTRL_1, 0);
+	ssd1289_write(info, 0x0000, 1);
+
+	ssd1289_write(info, SSD1289_REG_V_SCROLL_CTRL_2, 0);
+	ssd1289_write(info, 0x0000, 1);
+
+	/* 1st screen driving position */
+	ssd1289_write(info, SSD1289_REG_FIRST_WIN_START, 0);
+	ssd1289_write(info, 0x0000, 1);
+
+	ssd1289_write(info, SSD1289_REG_FIRST_WIN_END, 0);
+	ssd1289_write(info, 0x013F, 1);
+
+	/* 2nd screen driving position */
+	ssd1289_write(info, SSD1289_REG_SECND_WIN_START, 0);
+	ssd1289_write(info, 0x0000, 1);
+
+	ssd1289_write(info, SSD1289_REG_SECND_WIN_END, 0);
+	ssd1289_write(info, 0x0000, 1);
+
+	mdelay(20);
+	/* gamma control */
+	ssd1289_write(info, SSD1289_REG_GAMMA_CTRL_1, 0);
+	ssd1289_write(info, 0x0707, 1);
+
+	ssd1289_write(info, SSD1289_REG_GAMMA_CTRL_2, 0);
+	ssd1289_write(info, 0x0704, 1);
+
+	ssd1289_write(info, SSD1289_REG_GAMMA_CTRL_3, 0);
+	ssd1289_write(info, 0x0204, 1);
+
+	ssd1289_write(info, SSD1289_REG_GAMMA_CTRL_4, 0);
+	ssd1289_write(info, 0x0201, 1);
+
+	ssd1289_write(info, SSD1289_REG_GAMMA_CTRL_5, 0);
+	ssd1289_write(info, 0x0203, 1);
+
+	ssd1289_write(info, SSD1289_REG_GAMMA_CTRL_6, 0);
+	ssd1289_write(info, 0x0204, 1);
+
+	ssd1289_write(info, SSD1289_REG_GAMMA_CTRL_7, 0);
+	ssd1289_write(info, 0x0204, 1);
+
+	ssd1289_write(info, SSD1289_REG_GAMMA_CTRL_8, 0);
+	ssd1289_write(info, 0x0502, 1);
+
+	ssd1289_write(info, SSD1289_REG_GAMMA_CTRL_9, 0);
+	ssd1289_write(info, 0x0302, 1);
+
+	ssd1289_write(info, SSD1289_REG_GAMMA_CTRL_10, 0);
+	ssd1289_write(info, 0x0500, 1);
+
+	/* ram write data mask */
+	ssd1289_write(info, SSD1289_REG_WR_DATA_MASK_1, 0);
+	ssd1289_write(info, 0x0000, 1);
+
+	ssd1289_write(info, SSD1289_REG_WR_DATA_MASK_2, 0);
+	ssd1289_write(info, 0x0000, 1);
+
+	/* frame frequency control */
+	ssd1289_write(info, SSD1289_REG_FRAME_FREQUENCY, 0);
+	ssd1289_write(info, 0xe000, 1);
+
+	/* optimize data access speed */
+	ssd1289_write(info, SSD1289_REG_OPT_SPEED_1, 0);
+	ssd1289_write(info, 0x0006, 1);
+
+	ssd1289_write(info, SSD1289_REG_OPT_SPEED_2, 0);
+	ssd1289_write(info, 0x12ae, 1);
+
+	ssd1289_write(info, SSD1289_REG_OPT_SPEED_3, 0);
+	ssd1289_write(info, 0x6ceb, 1);
+
+	/* horizontal ram address position */
+	ssd1289_write(info, SSD1289_REG_H_RAM_ADR_POS, 0);
+	ssd1289_write(info, 0xef00, 1);
+
+	/* vertical ram address position */
+	ssd1289_write(info, SSD1289_REG_V_RAM_ADR_START, 0);
+	ssd1289_write(info, 0x0000, 1);
+
+	ssd1289_write(info, SSD1289_REG_V_RAM_ADR_END, 0);
+	ssd1289_write(info, 0x013f, 1);
+
+	mdelay(20);
+
+	/* set start address counter */
+	ssd1289_write(info, SSD1289_REG_GDDRAM_X_ADDR, 0);
+	ssd1289_write(info, 0x00ef, 1);
+
+	ssd1289_write(info, SSD1289_REG_GDDRAM_Y_ADDR, 0);
+	ssd1289_write(info, 0x0000, 1);
+
+	ssd1289_write(info, SSD1289_REG_GDDRAM_DATA, 0);
+
+#if defined(CONFIG_SSD1289_FLEXBUS_MODE)
+	for (i = 0; i < info->screen_size; i += 2)
+		ssd1289_write(info, 0, 1);
+#elif defined(CONFIG_SSD1289_SPI_MODE)
+	count = info->screen_size / SPI_LCD_BLOCK_HALF_SIZE;
+	for (i = 0; i < count; i++)
+		ssd1289_spi_writeblock(info, NULL, 0);
+#endif
+}
+
+static void fsl_ssd1289_disable_lcd(struct fb_info *info)
+{
+	ssd1289_write(info, SSD1289_REG_DISPLAY_CTRL, 0);
+	ssd1289_write(info, 0x0200, 1);
+
+	ssd1289_write(info, SSD1289_REG_OSCILLATION, 0);
+	ssd1289_write(info, 0x0000, 1);
+}
+
+static int ssd1289fbd(void *arg)
+{
+	struct fb_info *info = arg;
+	int i;
+	unsigned short *buf_p;
+	struct fsl_ssd1289_fb_info *fbinfo = info->par;
+#if defined(CONFIG_SSD1289_SPI_MODE)
+	unsigned char *bufspi_p;
+	int count;
+#endif
+
+	while (!kthread_should_stop()) {
+		set_current_state(TASK_INTERRUPTIBLE);
+
+		if (fbinfo->openflag == 1) {
+			buf_p = (unsigned short *)(info->screen_base);
+
+#if defined(CONFIG_SSD1289_FLEXBUS_MODE)
+			for (i = 0; i < info->screen_size; i += 2) {
+				ssd1289_write(info, *buf_p, 1);
+				buf_p++;
+			}
+#elif defined(CONFIG_SSD1289_SPI_MODE)
+			bufspi_p = (unsigned char *)buf_p;
+			count = info->screen_size / SPI_LCD_BLOCK_HALF_SIZE;
+			for (i = 0; i < count; i++)
+				ssd1289_spi_writeblock(info, (bufspi_p +
+					SPI_LCD_BLOCK_HALF_SIZE * i), 1);
+#endif
+		}
+		schedule_timeout(HZ/25);
+	}
+
+	return 0;
+}
+
+static int fsl_ssd1289_check_var(struct fb_var_screeninfo *var,
+				struct fb_info *info)
+{
+	if (var->xres_virtual < var->xres)
+		var->xres_virtual = var->xres;
+	if (var->yres_virtual < var->yres)
+		var->yres_virtual = var->yres;
+
+	if (var->xoffset < 0)
+		var->xoffset = 0;
+
+	if (var->yoffset < 0)
+		var->yoffset = 0;
+
+	if (var->xoffset + info->var.xres > info->var.xres_virtual)
+		var->xoffset = info->var.xres_virtual - info->var.xres;
+
+	if (var->yoffset + info->var.yres > info->var.yres_virtual)
+		var->yoffset = info->var.yres_virtual - info->var.yres;
+
+	switch (var->bits_per_pixel) {
+	case 8:
+		/* 8 bpp, 332 format */
+		var->red.length		= 3;
+		var->red.offset		= 5;
+		var->red.msb_right	= 0;
+
+		var->green.length	= 3;
+		var->green.offset	= 2;
+		var->green.msb_right	= 0;
+
+		var->blue.length	= 2;
+		var->blue.offset	= 0;
+		var->blue.msb_right	= 0;
+
+		var->transp.length	= 0;
+		var->transp.offset	= 0;
+		var->transp.msb_right	= 0;
+		break;
+	case 16:
+		/* 16 bpp, 565 format */
+		var->red.length		= 5;
+		var->red.offset		= 11;
+		var->red.msb_right	= 0;
+
+		var->green.length	= 6;
+		var->green.offset	= 5;
+		var->green.msb_right	= 0;
+
+		var->blue.length	= 5;
+		var->blue.offset	= 0;
+		var->blue.msb_right	= 0;
+
+		var->transp.length	= 0;
+		var->transp.offset	= 0;
+		var->transp.msb_right	= 0;
+		break;
+	default:
+		printk(KERN_ERR "Depth not supported: %u BPP\n",
+			var->bits_per_pixel);
+		return -EINVAL;
+	}
+	return 0;
+}
+
+static int fsl_ssd1289_set_par(struct fb_info *info)
+{
+	struct fb_var_screeninfo *var = &info->var;
+
+	switch (var->bits_per_pixel) {
+	case 16:
+		info->fix.visual = FB_VISUAL_TRUECOLOR;
+		break;
+	case 8:
+		info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
+		break;
+	default:
+		info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
+		break;
+	}
+
+	return 0;
+}
+
+static inline __u32 CNVT_TOHW(__u32 val, __u32 width)
+{
+	return ((val<<width) + 0x7FFF - val)>>16;
+}
+
+static int fsl_ssd1289_setcolreg(unsigned regno,
+			       unsigned red, unsigned green, unsigned blue,
+			       unsigned transp, struct fb_info *info)
+{
+	int ret = 1;
+
+	/*
+	 * If greyscale is true, then we convert the RGB value
+	 * to greyscale no matter what visual we are using.
+	 */
+	if (info->var.grayscale)
+		red = green = blue = (19595 * red + 38470 * green +
+				      7471 * blue) >> 16;
+	switch (info->fix.visual) {
+	case FB_VISUAL_TRUECOLOR:
+		if (regno < 16) {
+			u32 *pal = info->pseudo_palette;
+			u32 value;
+
+			red = CNVT_TOHW(red, info->var.red.length);
+			green = CNVT_TOHW(green, info->var.green.length);
+			blue = CNVT_TOHW(blue, info->var.blue.length);
+			transp = CNVT_TOHW(transp, info->var.transp.length);
+
+			value = (red << info->var.red.offset) |
+				(green << info->var.green.offset) |
+				(blue << info->var.blue.offset) |
+				(transp << info->var.transp.offset);
+
+			pal[regno] = value;
+			ret = 0;
+		}
+		break;
+	case FB_VISUAL_STATIC_PSEUDOCOLOR:
+	case FB_VISUAL_PSEUDOCOLOR:
+		break;
+	}
+	return ret;
+}
+
+static int fsl_ssd1289_blank(int blank_mode, struct fb_info *info)
+{
+	if (blank_mode == FB_BLANK_POWERDOWN)
+		fsl_ssd1289_disable_lcd(info);
+	else
+		fsl_ssd1289_enable_lcd(info);
+
+	return 0;
+}
+
+static int fsl_ssd1289_open(struct fb_info *info, int user)
+{
+	struct fsl_ssd1289_fb_info *fbinfo = info->par;
+	struct task_struct *task;
+	int ret;
+
+	if (fbinfo->openflag == 0) {
+		memset(info->screen_base, 0, info->screen_size);
+		fsl_ssd1289_enable_lcd(info);
+
+		task = kthread_run(ssd1289fbd, info, "SSD1289 LCD");
+		if (IS_ERR(task)) {
+			ret = PTR_ERR(task);
+			return ret;
+		}
+		fbinfo->task = task;
+	}
+
+	fbinfo->openflag = 1;
+	return 0;
+}
+
+static int fsl_ssd1289_release(struct fb_info *info, int user)
+{
+	struct fsl_ssd1289_fb_info *fbinfo = info->par;
+
+	fbinfo->openflag = 0;
+	if (fbinfo->task) {
+		struct task_struct *task = fbinfo->task;
+		fbinfo->task = NULL;
+		kthread_stop(task);
+	}
+
+	memset(info->screen_base, 0, info->screen_size);
+	fsl_ssd1289_disable_lcd(info);
+	return 0;
+}
+
+static struct fb_ops fsl_ssd1289_ops = {
+	.owner		= THIS_MODULE,
+	.fb_check_var	= fsl_ssd1289_check_var,
+	.fb_set_par	= fsl_ssd1289_set_par,
+	.fb_setcolreg	= fsl_ssd1289_setcolreg,
+	.fb_blank	= fsl_ssd1289_blank,
+	.fb_open	= fsl_ssd1289_open,
+	.fb_release	= fsl_ssd1289_release,
+	.fb_copyarea	= cfb_copyarea,
+	.fb_fillrect	= cfb_fillrect,
+	.fb_imageblit	= cfb_imageblit,
+};
+
+static int fsl_ssd1289_map_video_memory(struct fb_info *info)
+{
+	unsigned int map_size = info->fix.smem_len;
+
+#if defined(CONFIG_SSD1289_FLEXBUS_MODE)
+	struct fsl_ssd1289_fb_info *fbinfo = info->par;
+
+	fbinfo->ssd1289_reg.cmd =
+		ioremap_nocache(FLEXBUS_LCD_CMD_ADDRESS, 2);
+	fbinfo->ssd1289_reg.data =
+		ioremap_nocache(FLEXBUS_LCD_DATA_ADDRESS, 2);
+#endif
+
+	info->screen_base = kmalloc(map_size, GFP_KERNEL);
+	info->fix.smem_start = virt_to_phys(info->screen_base);
+	info->screen_size = info->fix.smem_len;
+
+	if (info->screen_base)
+		memset(info->screen_base, 0, map_size);
+
+	return info->screen_base ? 0 : -ENOMEM;
+}
+
+static inline void fsl_ssd1289_unmap_video_memory(struct fb_info *info)
+{
+#if defined(CONFIG_SSD1289_FLEXBUS_MODE)
+	struct fsl_ssd1289_fb_info *fbinfo = info->par;
+
+	iounmap(fbinfo->ssd1289_reg.cmd);
+	iounmap(fbinfo->ssd1289_reg.data);
+#endif
+	kfree(info->screen_base);
+}
+
+
+#if defined(CONFIG_SSD1289_FLEXBUS_MODE)
+static int fsl_ssd1289_probe(struct platform_device *pdev)
+#elif defined(CONFIG_SSD1289_SPI_MODE)
+static int fsl_ssd1289_probe(struct spi_device *spi)
+#endif
+{
+	struct fsl_ssd1289_fb_info *fbinfo;
+	struct fb_info *info;
+	struct fsl_ssd1289_fb_display *display;
+	int ret;
+	unsigned long smem_len;
+
+#if defined(CONFIG_SSD1289_FLEXBUS_MODE)
+	info = framebuffer_alloc(sizeof(struct fsl_ssd1289_fb_info),
+			&pdev->dev);
+	if (!info)
+		return -ENOMEM;
+
+	platform_set_drvdata(pdev, info);
+
+	fbinfo = info->par;
+	fbinfo->dev = &pdev->dev;
+	display = pdev->dev.platform_data;
+#elif defined(CONFIG_SSD1289_SPI_MODE)
+	info = framebuffer_alloc(sizeof(struct fsl_ssd1289_fb_info),
+			&spi->dev);
+	if (!info)
+		return -ENOMEM;
+
+	dev_set_drvdata(&spi->dev, info);
+
+	fbinfo = info->par;
+	fbinfo->dev = &spi->dev;
+	fbinfo->spidev = spi;
+	display = spi->dev.platform_data;
+#endif
+
+	fbinfo->openflag = 0;
+	info->fix.type = FB_TYPE_PACKED_PIXELS;
+	info->fix.type_aux = 0;
+	info->fix.xpanstep = 0;
+	info->fix.ypanstep = 0;
+	info->fix.ywrapstep = 0;
+	info->fix.accel = FB_ACCEL_NONE;
+
+	info->var.nonstd = 0;
+	info->var.activate = FB_ACTIVATE_NOW;
+	info->var.accel_flags = 0;
+	info->var.vmode = FB_VMODE_NONINTERLACED;
+
+	info->fbops = &fsl_ssd1289_ops;
+	info->flags = FBINFO_HWACCEL_IMAGEBLIT | FBINFO_HWACCEL_FILLRECT
+				| FBINFO_HWACCEL_COPYAREA;
+	info->pseudo_palette = &fbinfo->pseudo_palette;
+
+	/* find maximum required memory size for display */
+	smem_len = display->xres;
+	smem_len *= display->yres;
+	smem_len *= display->bpp;
+	smem_len >>= 3;
+	if (info->fix.smem_len < smem_len)
+		info->fix.smem_len = smem_len;
+
+	/* Intialize video memory */
+	ret = fsl_ssd1289_map_video_memory(info);
+	if (ret) {
+		printk(KERN_ERR "Failed to allocate video RAM: %d\n", ret);
+		ret = -ENOMEM;
+		goto dealloc_fb;
+	}
+
+	info->var.xres = display->xres;
+	info->var.yres = display->yres;
+	info->var.bits_per_pixel = display->bpp;
+	info->fix.line_length = (info->var.xres * info->var.bits_per_pixel) / 8;
+
+	fsl_ssd1289_check_var(&info->var, info);
+
+	ret = register_framebuffer(info);
+	if (ret < 0) {
+		printk(KERN_ERR "Failed to register framebuffer device: %d\n",
+			ret);
+		goto free_video_memory;
+	}
+
+	printk(KERN_INFO "fb: SSD1289 TFT LCD Framebuffer Driver\n");
+	return 0;
+
+free_video_memory:
+	fsl_ssd1289_unmap_video_memory(info);
+dealloc_fb:
+#if defined(CONFIG_SSD1289_FLEXBUS_MODE)
+	platform_set_drvdata(pdev, NULL);
+#elif defined(CONFIG_SSD1289_SPI_MODE)
+	dev_set_drvdata(&spi->dev, NULL);
+#endif
+	framebuffer_release(info);
+	return ret;
+}
+
+#if defined(CONFIG_SSD1289_FLEXBUS_MODE)
+static int fsl_ssd1289_remove(struct platform_device *pdev)
+{
+	struct fb_info *info = platform_get_drvdata(pdev);
+
+	platform_set_drvdata(pdev, NULL);
+#elif defined(CONFIG_SSD1289_SPI_MODE)
+static int fsl_ssd1289_remove(struct spi_device *spi)
+{
+	struct fb_info *info = dev_get_drvdata(&spi->dev);
+
+	dev_set_drvdata(&spi->dev, NULL);
+#endif
+	unregister_framebuffer(info);
+	fsl_ssd1289_unmap_video_memory(info);
+	framebuffer_release(info);
+	return 0;
+}
+
+#ifdef CONFIG_PM
+#if defined(CONFIG_SSD1289_FLEXBUS_MODE)
+static int fsl_ssd1289_suspend(struct platform_device *dev, pm_message_t state)
+{
+	struct fb_info *info = platform_get_drvdata(dev);
+#elif defined(CONFIG_SSD1289_SPI_MODE)
+static int fsl_ssd1289_suspend(struct spi_device *spi, pm_message_t state)
+{
+	struct fb_info *info = dev_get_drvdata(&spi->dev);
+#endif
+	/* enter into sleep mode */
+	ssd1289_write(info, SSD1289_REG_SLEEP_MODE, 0);
+	ssd1289_write(info, 0x0001, 1);
+	return 0;
+}
+
+#if defined(CONFIG_SSD1289_FLEXBUS_MODE)
+static int fsl_ssd1289_resume(struct platform_device *dev)
+{
+	struct fb_info *info = platform_get_drvdata(dev);
+#elif defined(CONFIG_SSD1289_SPI_MODE)
+static int fsl_ssd1289_resume(struct spi_device *spi)
+{
+	struct fb_info *info = dev_get_drvdata(&spi->dev);
+#endif
+	/* leave sleep mode */
+	ssd1289_write(info, SSD1289_REG_SLEEP_MODE, 0);
+	ssd1289_write(info, 0x0000, 1);
+	return 0;
+}
+#else
+#define fsl_ssd1289_suspend NULL
+#define fsl_ssd1289_resume NULL
+#endif
+
+#if defined(CONFIG_SSD1289_FLEXBUS_MODE)
+static struct platform_driver fsl_ssd1289_driver = {
+	.probe = fsl_ssd1289_probe,
+	.remove = fsl_ssd1289_remove,
+	.suspend = fsl_ssd1289_suspend,
+	.resume = fsl_ssd1289_resume,
+	.driver = {
+		.name = "fsl-ssd1289",
+		.owner = THIS_MODULE,
+	},
+};
+#elif defined(CONFIG_SSD1289_SPI_MODE)
+static struct spi_driver spi_ssd1289_driver = {
+	.driver = {
+		.name	= "spi-ssd1289",
+		.bus	= &spi_bus_type,
+		.owner	= THIS_MODULE,
+	},
+	.probe = fsl_ssd1289_probe,
+	.remove = fsl_ssd1289_remove,
+	.suspend = fsl_ssd1289_suspend,
+	.resume = fsl_ssd1289_resume,
+};
+#endif
+
+static int __devinit fsl_ssd1289_init(void)
+{
+#if defined(CONFIG_SSD1289_FLEXBUS_MODE)
+	return platform_driver_register(&fsl_ssd1289_driver);
+#elif defined(CONFIG_SSD1289_SPI_MODE)
+	return spi_register_driver(&spi_ssd1289_driver);
+#endif
+}
+
+static void __exit fsl_ssd1289_exit(void)
+{
+#if defined(CONFIG_SSD1289_FLEXBUS_MODE)
+	return platform_driver_unregister(&fsl_ssd1289_driver);
+#elif defined(CONFIG_SSD1289_SPI_MODE)
+	return spi_unregister_driver(&spi_ssd1289_driver);
+#endif
+}
+
+module_init(fsl_ssd1289_init);
+module_exit(fsl_ssd1289_exit);
+
+MODULE_AUTHOR("Alison Wang <b18965@freescale.com>");
+MODULE_DESCRIPTION("Freescale MCF54418 SSD1289 TFT LCD Framebuffer Driver");
+MODULE_LICENSE("GPL");