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openwrt-mirror/target/linux/coldfire/patches/018-Add-SSD1289-TFT-LCD-framebuffer-driver-on-TWR-MCF544.patch
Imre Kaloz 880de62f91 switch to 2.6.38 
SVN-Revision: 31546
2012-05-01 07:00:17 +00:00

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26 KiB
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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");
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