Merge xburst target.

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@19098 3c298f89-4303-0410-b956-a3cf2f4a3e73

2 files changed, 830 insertions, 0 deletions

diff --git a/target/linux/xburst/files-2.6.32/drivers/video/backlight/gpm940b0.c b/target/linux/xburst/files-2.6.32/drivers/video/backlight/gpm940b0.c
new file mode 100644
index 0000000000..5cfb12f0e8
--- /dev/null
+++ b/target/linux/xburst/files-2.6.32/drivers/video/backlight/gpm940b0.c
@@ -0,0 +1,255 @@
+/*
+ *  Copyright (C) 2009, Lars-Peter Clausen <lars@metafoo.de>
+ *  	JZ4720/JZ4740 SoC 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.
+ *
+ *  You should have received a copy of the  GNU General Public License along
+ *  with this program; if not, write  to the Free Software Foundation, Inc.,
+ *  675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/spi/spi.h>
+#include <linux/lcd.h>
+#include <linux/backlight.h>
+#include <linux/delay.h>
+
+struct gpm940b0 {
+	struct spi_device *spi;
+	struct lcd_device *lcd;
+	struct backlight_device *bl;
+	unsigned enabled:1;
+};
+
+static int gpm940b0_write_reg(struct spi_device *spi, uint8_t reg,
+				uint8_t data)
+{
+	uint8_t buf[2];
+	buf[0] = ((reg & 0x40) << 1) | (reg & 0x3f);
+	buf[1] = data;
+
+	return spi_write(spi, buf, sizeof(buf));
+}
+
+static void gpm940b0_power_disable(struct gpm940b0 *gpm940b0)
+{
+	int ret = gpm940b0_write_reg(gpm940b0->spi, 0x5, 0xc6) ;
+	if (ret < 0)
+		printk("Failed to disable power: %d\n", ret);
+}
+
+static void gpm940b0_power_enable(struct gpm940b0 *gpm940b0)
+{
+	gpm940b0_write_reg(gpm940b0->spi, 0x5, 0xc7);
+}
+
+
+static int gpm940b0_set_power(struct lcd_device *lcd, int power)
+{
+	struct gpm940b0 *gpm940b0 = lcd_get_data(lcd);
+
+	switch (power) {
+	case FB_BLANK_UNBLANK:
+		mdelay(20);
+		gpm940b0->enabled = 1;
+		gpm940b0_power_enable(gpm940b0);
+		break;
+	default:
+		gpm940b0->enabled = 0;
+		gpm940b0_power_disable(gpm940b0);
+		mdelay(20);
+		break;
+	}
+	return 0;
+}
+
+static int gpm940b0_set_contrast(struct lcd_device *lcd, int contrast)
+{
+	struct gpm940b0 *gpm940b0 = lcd_get_data(lcd);
+	gpm940b0_write_reg(gpm940b0->spi, 0x0d, contrast);
+	return 0;
+}
+
+static int gpm940b0_set_mode(struct lcd_device *lcd, struct fb_videomode *mode)
+{
+	if (mode->xres != 320 && mode->yres != 240)
+		return -EINVAL;
+
+	return 0;
+}
+
+/*
+int gpm940b0_bl_update_status(struct backlight_device *bl)
+{
+	struct gpm940b0 *gpm940b0 = bl_get_data(bl);
+
+	gpm940b0->reg5 &= ~0x38;
+	gpm940b0->reg5 |= ((bl->props.brightness << 3) & 0x38);
+
+	gpm940b0_write_reg(gpm940b0->spi, 0x5, gpm940b0->reg5);
+
+	return 0;
+}*/
+
+static ssize_t reg_write(struct device *dev, struct device_attribute *attr,
+						const char *buf, size_t count)
+{
+	char *buf2;
+	uint32_t reg = simple_strtoul(buf, &buf2, 10);
+	uint32_t val = simple_strtoul(buf2 + 1, NULL, 10);
+	struct gpm940b0 *gpm940b0 = dev_get_drvdata(dev);
+
+	if (reg < 0 || val < 0)
+		return -EINVAL;
+
+	gpm940b0_write_reg(gpm940b0->spi, reg, val);
+	return count;
+}
+
+static DEVICE_ATTR(reg, 0644, NULL, reg_write);
+
+static struct lcd_ops gpm940b0_lcd_ops = {
+	.set_power = gpm940b0_set_power,
+	.set_contrast = gpm940b0_set_contrast,
+	.set_mode = gpm940b0_set_mode,
+};
+
+#if 0
+static struct backlight_ops gpm940b0_bl_ops = {
+/*	.get_brightness	= gpm940b0_bl_get_brightness,*/
+	.update_status	= gpm940b0_bl_update_status,
+};
+#endif
+
+static int __devinit gpm940b0_probe(struct spi_device *spi)
+{
+	int ret;
+	struct gpm940b0 *gpm940b0;
+
+	gpm940b0 = kmalloc(sizeof(*gpm940b0), GFP_KERNEL);
+
+	spi->bits_per_word = 8;
+
+	ret = spi_setup(spi);
+	if (ret) {
+		dev_err(&spi->dev, "Failed to setup spi\n");
+		goto err_free_gpm940b0;
+	}
+
+	gpm940b0->spi = spi;
+
+	gpm940b0->lcd = lcd_device_register("gpm940b0-lcd", &spi->dev, gpm940b0,
+						&gpm940b0_lcd_ops);
+
+	if (IS_ERR(gpm940b0->lcd)) {
+		ret = PTR_ERR(gpm940b0->lcd);
+		dev_err(&spi->dev, "Failed to register lcd device: %d\n", ret);
+		goto err_free_gpm940b0;
+	}
+
+	gpm940b0->lcd->props.max_contrast = 255;
+
+#if 0
+	gpm940b0->bl = backlight_device_register("gpm940b0-bl", &spi->dev, gpm940b0,
+						 &gpm940b0_bl_ops);
+
+	if (IS_ERR(gpm940b0->bl)) {
+		ret = PTR_ERR(gpm940b0->bl);
+		dev_err(&spi->dev, "Failed to register backlight device: %d\n", ret);
+		gpm940b0->bl = NULL;
+	} else {
+		gpm940b0->bl->props.max_brightness = 8;
+		gpm940b0->bl->props.brightness = 0;
+		gpm940b0->bl->props.power = FB_BLANK_UNBLANK;
+	}
+#endif
+
+	ret = device_create_file(&spi->dev, &dev_attr_reg);
+	if (ret)
+		goto err_unregister_lcd;
+
+	gpm940b0->enabled = 1;
+	dev_set_drvdata(&spi->dev, gpm940b0);
+
+	gpm940b0_write_reg(spi, 0x13, 0x01);
+	gpm940b0_write_reg(spi, 0x5, 0xc7);
+	return 0;
+err_unregister_lcd:
+	lcd_device_unregister(gpm940b0->lcd);
+err_free_gpm940b0:
+	kfree(gpm940b0);
+	return ret;
+}
+
+static int __devexit gpm940b0_remove(struct spi_device *spi)
+{
+	struct gpm940b0 *gpm940b0 = spi_get_drvdata(spi);
+#if 0
+	if (gpm940b0->bl)
+		backlight_device_unregister(gpm940b0->bl);
+#endif
+
+	lcd_device_unregister(gpm940b0->lcd);
+
+	spi_set_drvdata(spi, NULL);
+	kfree(gpm940b0);
+	return 0;
+}
+
+#ifdef CONFIG_PM
+
+static int gpm940b0_suspend(struct spi_device *spi, pm_message_t state)
+{
+	struct gpm940b0 *gpm940b0 = spi_get_drvdata(spi);
+	if (gpm940b0->enabled) {
+		gpm940b0_power_disable(gpm940b0);
+		mdelay(10);
+	}
+	return 0;
+}
+
+static int gpm940b0_resume(struct spi_device *spi)
+{
+	struct gpm940b0 *gpm940b0 = spi_get_drvdata(spi);
+	if (gpm940b0->enabled)
+		gpm940b0_power_enable(gpm940b0);
+	return 0;
+}
+
+#else
+#define gpm940b0_suspend NULL
+#define gpm940b0_resume NULL
+#endif
+
+static struct spi_driver gpm940b0_driver = {
+	.driver = {
+		.name = "gpm940b0",
+		.owner = THIS_MODULE,
+	},
+	.probe = gpm940b0_probe,
+	.remove = __devexit_p(gpm940b0_remove),
+	.suspend = gpm940b0_suspend,
+	.resume = gpm940b0_resume,
+};
+
+static int __init gpm940b0_init(void)
+{
+	return spi_register_driver(&gpm940b0_driver);
+}
+module_init(gpm940b0_init);
+
+static void __exit gpm940b0_exit(void)
+{
+	return spi_unregister_driver(&gpm940b0_driver);
+}
+module_exit(gpm940b0_exit)
+
+MODULE_AUTHOR("Lars-Peter Clausen");
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("LCD and backlight controll for Giantplus GPM940B0");
+MODULE_ALIAS("spi:gpm940b0");
diff --git a/target/linux/xburst/files-2.6.32/drivers/video/jz4740_fb.c b/target/linux/xburst/files-2.6.32/drivers/video/jz4740_fb.c
new file mode 100644
index 0000000000..7aac458a3b
--- /dev/null
+++ b/target/linux/xburst/files-2.6.32/drivers/video/jz4740_fb.c
@@ -0,0 +1,575 @@
+/*
+ *  Copyright (C) 2009, Lars-Peter Clausen <lars@metafoo.de>
+ *  	JZ4720/JZ4740 SoC 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.
+ *
+ *  You should have received a copy of the  GNU General Public License along
+ *  with this program; if not, write  to the Free Software Foundation, Inc.,
+ *  675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ */
+
+#include <linux/types.h>
+#include <linux/platform_device.h>
+#include <linux/fb.h>
+#include <linux/module.h>
+#include <linux/dma-mapping.h>
+#include <linux/jz4740_fb.h>
+
+#include <linux/delay.h>
+#include <linux/clk.h>
+
+#include <asm/mach-jz4740/gpio.h>
+
+#define JZ_REG_LCD_CFG		0x00
+#define JZ_REG_LCD_VSYNC	0x04
+#define JZ_REG_LCD_HSYNC	0x08
+#define JZ_REG_LCD_VAT		0x0C
+#define JZ_REG_LCD_DAH		0x10
+#define JZ_REG_LCD_DAV		0x14
+#define JZ_REG_LCD_PS		0x18
+#define JZ_REG_LCD_CLS		0x1C
+#define JZ_REG_LCD_SPL		0x20
+#define JZ_REG_LCD_REV		0x24
+#define JZ_REG_LCD_CTRL		0x30
+#define JZ_REG_LCD_STATE	0x34
+#define JZ_REG_LCD_IID		0x38
+#define JZ_REG_LCD_DA0		0x40
+#define JZ_REG_LCD_SA0		0x44
+#define JZ_REG_LCD_FID0		0x48
+#define JZ_REG_LCD_CMD0		0x4C
+#define JZ_REG_LCD_DA1		0x50
+#define JZ_REG_LCD_SA1		0x54
+#define JZ_REG_LCD_FID1		0x58
+#define JZ_REG_LCD_CMD1		0x5C
+
+#define JZ_LCD_CFG_SLCD BIT(31)
+#define JZ_LCD_CFG_PSM BIT(23)
+#define JZ_LCD_CFG_CLSM BIT(22)
+#define JZ_LCD_CFG_SPLM BIT(21)
+#define JZ_LCD_CFG_REVM BIT(20)
+#define JZ_LCD_CFG_HSYNCM BIT(19)
+#define JZ_LCD_CFG_PCLKM BIT(18)
+#define JZ_LCD_CFG_INV BIT(17)
+#define JZ_LCD_CFG_SYNC_DIR BIT(16)
+#define JZ_LCD_CFG_PSP BIT(15)
+#define JZ_LCD_CFG_CLSP BIT(14)
+#define JZ_LCD_CFG_SPLP BIT(13)
+#define JZ_LCD_CFG_REVP BIT(12)
+#define JZ_LCD_CFG_HSYNCP BIT(11)
+#define JZ_LCD_CFG_PCLKP BIT(10)
+#define JZ_LCD_CFG_DEP BIT(9)
+#define JZ_LCD_CFG_VSYNCP BIT(8)
+#define JZ_LCD_CFG_18_BIT BIT(7)
+#define JZ_LCD_CFG_PDW BIT(5) | BIT(4)
+#define JZ_LCD_CFG_MODE_MASK 0xf
+
+#define JZ_LCD_CTRL_BURST_4 (0x0 << 28)
+#define JZ_LCD_CTRL_BURST_8 (0x1 << 28)
+#define JZ_LCD_CTRL_BURST_16 (0x2 << 28)
+#define JZ_LCD_CTRL_RGB555 BIT(27)
+#define JZ_LCD_CTRL_OFUP BIT(26)
+#define JZ_LCD_CTRL_FRC_GRAYSCALE_16 (0x0 << 24)
+#define JZ_LCD_CTRL_FRC_GRAYSCALE_4 (0x1 << 24)
+#define JZ_LCD_CTRL_FRC_GRAYSCALE_2 (0x2 << 24)
+#define JZ_LCD_CTRL_PDD_MASK (0xff << 16)
+#define JZ_LCD_CTRL_EOF_IRQ BIT(13)
+#define JZ_LCD_CTRL_SOF_IRQ BIT(12)
+#define JZ_LCD_CTRL_OFU_IRQ BIT(11)
+#define JZ_LCD_CTRL_IFU0_IRQ BIT(10)
+#define JZ_LCD_CTRL_IFU1_IRQ BIT(9)
+#define JZ_LCD_CTRL_DD_IRQ BIT(8)
+#define JZ_LCD_CTRL_QDD_IRQ BIT(7)
+#define JZ_LCD_CTRL_REVERSE_ENDIAN BIT(6)
+#define JZ_LCD_CTRL_LSB_FISRT BIT(5)
+#define JZ_LCD_CTRL_DISABLE BIT(4)
+#define JZ_LCD_CTRL_ENABLE BIT(3)
+#define JZ_LCD_CTRL_BPP_1 0x0
+#define JZ_LCD_CTRL_BPP_2 0x1
+#define JZ_LCD_CTRL_BPP_4 0x2
+#define JZ_LCD_CTRL_BPP_8 0x3
+#define JZ_LCD_CTRL_BPP_15_16 0x4
+#define JZ_LCD_CTRL_BPP_18_24 0x5
+
+#define JZ_LCD_CMD_SOF_IRQ BIT(15)
+#define JZ_LCD_CMD_EOF_IRQ BIT(16)
+#define JZ_LCD_CMD_ENABLE_PAL BIT(12)
+
+#define JZ_LCD_SYNC_MASK 0x3ff
+
+#define JZ_LCD_STATE_DISABLED BIT(0)
+
+struct jzfb_framedesc {
+	uint32_t next;
+	uint32_t addr;
+	uint32_t id;
+	uint32_t cmd;
+} __attribute__((packed));
+
+struct jzfb {
+	struct fb_info *fb;
+	struct platform_device *pdev;
+	void __iomem *base;
+	struct resource *mem;
+	struct jz4740_fb_platform_data *pdata;
+
+	void *devmem;
+	size_t devmem_size;
+	dma_addr_t devmem_phys;
+	void *vidmem;
+	size_t vidmem_size;
+	dma_addr_t vidmem_phys;
+	struct jzfb_framedesc *framedesc;
+
+	struct clk *ldclk;
+	struct clk *lpclk;
+
+	uint32_t pseudo_palette[16];
+	unsigned is_enabled:1;
+};
+
+static struct fb_fix_screeninfo jzfb_fix __devinitdata = {
+	.id =		"JZ4740 FB",
+	.type =		FB_TYPE_PACKED_PIXELS,
+	.visual =	FB_VISUAL_TRUECOLOR,
+	.xpanstep =	0,
+	.ypanstep =	0,
+	.ywrapstep =	0,
+	.accel =	FB_ACCEL_NONE,
+};
+
+const static struct jz_gpio_bulk_request jz_lcd_pins[] = {
+	JZ_GPIO_BULK_PIN(LCD_PCLK),
+	JZ_GPIO_BULK_PIN(LCD_HSYNC),
+	JZ_GPIO_BULK_PIN(LCD_VSYNC),
+	JZ_GPIO_BULK_PIN(LCD_DATA0),
+	JZ_GPIO_BULK_PIN(LCD_DATA1),
+	JZ_GPIO_BULK_PIN(LCD_DATA2),
+	JZ_GPIO_BULK_PIN(LCD_DATA3),
+	JZ_GPIO_BULK_PIN(LCD_DATA4),
+	JZ_GPIO_BULK_PIN(LCD_DATA5),
+	JZ_GPIO_BULK_PIN(LCD_DATA6),
+	JZ_GPIO_BULK_PIN(LCD_DATA7),
+};
+
+
+int jzfb_setcolreg(unsigned regno, unsigned red, unsigned green, unsigned blue,
+			unsigned transp, struct fb_info *fb)
+{
+	((uint32_t*)fb->pseudo_palette)[regno] = red << 16 | green << 8 | blue;
+	return 0;
+}
+
+static int jzfb_get_controller_bpp(struct jzfb *jzfb)
+{
+	switch(jzfb->pdata->bpp) {
+		case 18:
+		case 24:
+			return 32;
+			break;
+		default:
+			return jzfb->pdata->bpp;
+	}
+}
+
+static int jzfb_check_var(struct fb_var_screeninfo *var, struct fb_info *fb)
+{
+	struct jzfb* jzfb = fb->par;
+	struct fb_videomode *mode = jzfb->pdata->modes;
+	int i;
+
+	if (fb->var.bits_per_pixel != jzfb_get_controller_bpp(jzfb) &&
+		fb->var.bits_per_pixel != jzfb->pdata->bpp)
+		return -EINVAL;
+
+	for (i = 0; i < jzfb->pdata->num_modes; ++i, ++mode) {
+		if (mode->xres == fb->var.xres && mode->yres == fb->var.yres)
+			break;
+	}
+
+	if (i == jzfb->pdata->num_modes)
+		return -EINVAL;
+
+	fb_videomode_to_var(&fb->var, fb->mode);
+
+	switch (jzfb->pdata->bpp) {
+	case 8:
+		break;
+	case 15:
+		var->red.offset = 10;
+		var->red.length = 5;
+		var->green.offset = 6;
+		var->green.length = 5;
+		var->blue.offset = 0;
+		var->blue.length = 5;
+		break;
+	case 16:
+		var->red.offset = 11;
+		var->red.length = 5;
+		var->green.offset = 6;
+		var->green.length = 6;
+		var->blue.offset = 0;
+		var->blue.length = 5;
+		break;
+	case 18:
+		var->red.offset = 16;
+		var->red.length = 6;
+		var->green.offset = 8;
+		var->green.length = 6;
+		var->blue.offset = 0;
+		var->blue.length = 6;
+		fb->var.bits_per_pixel = 32;
+		break;
+	case 32:
+	case 24:
+		var->transp.offset = 24;
+		var->transp.length = 8;
+		var->red.offset = 16;
+		var->red.length = 8;
+		var->green.offset = 8;
+		var->green.length = 8;
+		var->blue.offset = 0;
+		var->blue.length = 8;
+		fb->var.bits_per_pixel = 32;
+		break;
+	default:
+		break;
+	}
+
+	return 0;
+}
+
+static int jzfb_set_par(struct fb_info *info)
+{
+	struct jzfb* jzfb = info->par;
+	struct fb_var_screeninfo *var = &info->var;
+	uint16_t hds, vds;
+	uint16_t hde, vde;
+	uint16_t ht, vt;
+	uint32_t ctrl;
+
+	hds = var->hsync_len + var->left_margin;
+	hde = hds + var->xres;
+	ht = hde + var->right_margin;
+
+	vds = var->vsync_len + var->upper_margin;
+	vde = vds + var->yres;
+	vt = vde + var->lower_margin;
+
+	writel(var->hsync_len, jzfb->base + JZ_REG_LCD_HSYNC);
+	writel(var->vsync_len, jzfb->base + JZ_REG_LCD_VSYNC);
+
+	writel((ht << 16) | vt, jzfb->base + JZ_REG_LCD_VAT);
+
+	writel((hds << 16) | hde, jzfb->base + JZ_REG_LCD_DAH);
+	writel((vds << 16) | vde, jzfb->base + JZ_REG_LCD_DAV);
+
+	ctrl = JZ_LCD_CTRL_OFUP | JZ_LCD_CTRL_BURST_16;
+	ctrl |= JZ_LCD_CTRL_ENABLE;
+
+	switch (jzfb->pdata->bpp) {
+	case 1:
+		ctrl |= JZ_LCD_CTRL_BPP_1;
+		break;
+	case 2:
+		ctrl |= JZ_LCD_CTRL_BPP_2;
+		break;
+	case 4:
+		ctrl |= JZ_LCD_CTRL_BPP_4;
+		break;
+	case 8:
+		ctrl |= JZ_LCD_CTRL_BPP_8;
+	break;
+	case 15:
+		ctrl |= JZ_LCD_CTRL_RGB555; /* Falltrough */
+	case 16:
+		ctrl |= JZ_LCD_CTRL_BPP_15_16;
+		break;
+	case 18:
+	case 24:
+	case 32:
+		ctrl |= JZ_LCD_CTRL_BPP_18_24;
+		break;
+	default:
+		break;
+	}
+	writel(ctrl, jzfb->base + JZ_REG_LCD_CTRL);
+
+	return 0;
+}
+
+static int jzfb_blank(int blank_mode, struct fb_info *info)
+{
+	struct jzfb* jzfb = info->par;
+	uint32_t ctrl = readl(jzfb->base + JZ_REG_LCD_CTRL);
+
+	switch (blank_mode) {
+	case FB_BLANK_UNBLANK:
+		if (jzfb->is_enabled)
+			return 0;
+
+		jz_gpio_bulk_resume(jz_lcd_pins, ARRAY_SIZE(jz_lcd_pins));
+		clk_enable(jzfb->ldclk);
+		clk_enable(jzfb->lpclk);
+
+		writel(0, jzfb->base + JZ_REG_LCD_STATE);
+
+		writel(jzfb->framedesc->next, jzfb->base + JZ_REG_LCD_DA0);
+
+		ctrl |= JZ_LCD_CTRL_ENABLE;
+		ctrl &= ~JZ_LCD_CTRL_DISABLE;
+		writel(ctrl, jzfb->base + JZ_REG_LCD_CTRL);
+
+		jzfb->is_enabled = 1;
+		break;
+	default:
+		if (!jzfb->is_enabled)
+			return 0;
+
+		ctrl |= JZ_LCD_CTRL_DISABLE;
+		writel(ctrl, jzfb->base + JZ_REG_LCD_CTRL);
+		do {
+			ctrl = readl(jzfb->base + JZ_REG_LCD_STATE);
+		} while (!(ctrl & JZ_LCD_STATE_DISABLED));
+
+		clk_disable(jzfb->lpclk);
+		clk_disable(jzfb->ldclk);
+		jz_gpio_bulk_suspend(jz_lcd_pins, ARRAY_SIZE(jz_lcd_pins));
+		jzfb->is_enabled = 0;
+		break;
+	}
+
+	return 0;
+}
+
+
+static int jzfb_alloc_vidmem(struct jzfb *jzfb)
+{
+	size_t devmem_size;
+	int max_videosize = 0;
+	struct fb_videomode *mode = jzfb->pdata->modes;
+	struct jzfb_framedesc *framedesc;
+	void *page;
+	int i;
+
+	for (i = 0; i < jzfb->pdata->num_modes; ++mode, ++i) {
+		if (max_videosize < mode->xres * mode->yres)
+			max_videosize = mode->xres * mode->yres;
+	}
+
+	max_videosize *= jzfb_get_controller_bpp(jzfb) >> 3;
+
+	devmem_size = max_videosize + sizeof(struct jzfb_framedesc);
+
+	jzfb->devmem_size = devmem_size;
+	jzfb->devmem = dma_alloc_coherent(&jzfb->pdev->dev,
+						PAGE_ALIGN(devmem_size),
+						&jzfb->devmem_phys, GFP_KERNEL);
+
+	if (!jzfb->devmem) {
+		return -ENOMEM;
+	}
+
+	for (page = jzfb->vidmem;
+		 page < jzfb->vidmem + PAGE_ALIGN(jzfb->vidmem_size);
+		 page += PAGE_SIZE) {
+		SetPageReserved(virt_to_page(page));
+	}
+
+
+	framedesc = jzfb->devmem  + max_videosize;
+	jzfb->vidmem = jzfb->devmem;
+	jzfb->vidmem_phys = jzfb->devmem_phys;
+
+	framedesc->next = jzfb->devmem_phys + max_videosize;
+	framedesc->addr = jzfb->devmem_phys;
+	framedesc->id = 0;
+	framedesc->cmd = 0;
+	framedesc->cmd |= max_videosize / 4;
+
+	jzfb->framedesc = framedesc;
+
+
+	return 0;
+}
+
+static void jzfb_free_devmem(struct jzfb *jzfb)
+{
+	dma_free_coherent(&jzfb->pdev->dev, jzfb->devmem_size, jzfb->devmem,
+			  jzfb->devmem_phys);
+}
+
+static struct  fb_ops jzfb_ops = {
+	.owner = THIS_MODULE,
+	.fb_check_var = jzfb_check_var,
+	.fb_set_par = jzfb_set_par,
+	.fb_blank = jzfb_blank,
+	.fb_fillrect	= sys_fillrect,
+	.fb_copyarea	= sys_copyarea,
+	.fb_imageblit	= sys_imageblit,
+	.fb_setcolreg = jzfb_setcolreg,
+};
+
+static int __devinit jzfb_probe(struct platform_device *pdev)
+{
+	int ret;
+	struct jzfb *jzfb;
+	struct fb_info *fb;
+	struct jz4740_fb_platform_data *pdata = pdev->dev.platform_data;
+	struct resource *mem;
+
+	if (!pdata) {
+		dev_err(&pdev->dev, "Missing platform data\n");
+		return -ENOENT;
+	}
+
+	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+
+	if (!mem) {
+		dev_err(&pdev->dev, "Failed to get register memory resource\n");
+		return -ENOENT;
+	}
+
+	mem = request_mem_region(mem->start, resource_size(mem), pdev->name);
+
+	if (!mem) {
+		dev_err(&pdev->dev, "Failed to request register memory region\n");
+		return -EBUSY;
+	}
+
+
+	fb = framebuffer_alloc(sizeof(struct jzfb), &pdev->dev);
+
+	if (!fb) {
+		dev_err(&pdev->dev, "Failed to allocate framebuffer device\n");
+		ret = -ENOMEM;
+		goto err_release_mem_region;
+	}
+
+	fb->fbops = &jzfb_ops;
+	fb->flags = FBINFO_DEFAULT;
+
+	jzfb = fb->par;
+	jzfb->pdev = pdev;
+	jzfb->pdata = pdata;
+	jzfb->mem = mem;
+
+	jzfb->ldclk = clk_get(&pdev->dev, "lcd");
+	jzfb->lpclk = clk_get(&pdev->dev, "lcd_pclk");
+
+	jzfb->is_enabled = 1;
+
+	if (IS_ERR(jzfb->ldclk)) {
+		ret = PTR_ERR(jzfb->ldclk);
+		dev_err(&pdev->dev, "Faild to get device clock: %d\n", ret);
+		goto err_framebuffer_release;
+	}
+
+	if (IS_ERR(jzfb->lpclk)) {
+		ret = PTR_ERR(jzfb->ldclk);
+		dev_err(&pdev->dev, "Faild to get pixel clock: %d\n", ret);
+		goto err_framebuffer_release;
+	}
+
+
+	jzfb->base = ioremap(mem->start, resource_size(mem));
+
+	if (!jzfb->base) {
+		dev_err(&pdev->dev, "Failed to ioremap register memory region\n");
+		ret = -EBUSY;
+		goto err_framebuffer_release;
+	}
+
+	platform_set_drvdata(pdev, jzfb);
+
+	fb_videomode_to_modelist(pdata->modes, pdata->num_modes,
+				 &fb->modelist);
+	fb->mode = pdata->modes;
+
+	fb_videomode_to_var(&fb->var, fb->mode);
+	fb->var.bits_per_pixel = pdata->bpp;
+	jzfb_check_var(&fb->var, fb);
+
+	ret = jzfb_alloc_vidmem(jzfb);
+	if (ret) {
+		dev_err(&pdev->dev, "Failed to allocate video memory\n");
+		goto err_iounmap;
+	}
+
+	fb->fix = jzfb_fix;
+	fb->fix.line_length = fb->var.bits_per_pixel * fb->var.xres / 8;
+	fb->fix.mmio_start = mem->start;
+	fb->fix.mmio_len = resource_size(mem);
+	fb->fix.smem_start = jzfb->vidmem_phys;
+	fb->fix.smem_len =  fb->fix.line_length * fb->var.yres;
+	fb->screen_base = jzfb->vidmem;
+	fb->pseudo_palette = jzfb->pseudo_palette;
+
+	fb_alloc_cmap(&fb->cmap, 256, 0);
+
+	jzfb_set_par(fb);
+	writel(jzfb->framedesc->next, jzfb->base + JZ_REG_LCD_DA0);
+
+	jz_gpio_bulk_request(jz_lcd_pins, ARRAY_SIZE(jz_lcd_pins));
+
+	ret = register_framebuffer(fb);
+	if (ret) {
+		dev_err(&pdev->dev, "Failed to register framebuffer: %d\n", ret);
+		goto err_free_devmem;
+	}
+
+	return 0;
+err_free_devmem:
+	jzfb_free_devmem(jzfb);
+err_iounmap:
+	iounmap(jzfb->base);
+err_framebuffer_release:
+	framebuffer_release(fb);
+err_release_mem_region:
+	release_mem_region(mem->start, resource_size(mem));
+	return ret;
+}
+
+static int __devexit jzfb_remove(struct platform_device *pdev)
+{
+	struct jzfb *jzfb = platform_get_drvdata(pdev);
+
+	jz_gpio_bulk_free(jz_lcd_pins, ARRAY_SIZE(jz_lcd_pins));
+	iounmap(jzfb->base);
+	release_mem_region(jzfb->mem->start, resource_size(jzfb->mem));
+	jzfb_free_devmem(jzfb);
+	platform_set_drvdata(pdev, NULL);
+	framebuffer_release(jzfb->fb);
+	return 0;
+}
+
+static struct platform_driver jzfb_driver = {
+	.probe = jzfb_probe,
+	.remove = __devexit_p(jzfb_remove),
+
+	.driver = {
+		.name = "jz4740-fb",
+	},
+};
+
+int __init jzfb_init(void)
+{
+	return platform_driver_register(&jzfb_driver);
+}
+module_init(jzfb_init);
+
+void __exit jzfb_exit(void)
+{
+	platform_driver_unregister(&jzfb_driver);
+}
+module_exit(jzfb_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
+MODULE_DESCRIPTION("JZ4720/JZ4740 SoC LCD framebuffer driver");
+MODULE_ALIAS("platform:jz4740-fb");
+MODULE_ALIAS("platform:jz4720-fb");