/*
   * File:         drivers/video/bf54x-lq043.c
   * Based on:
   * Author:       Michael Hennerich <hennerich@blackfin.uclinux.org>
   *
   * Created:

   * Description:  ADSP-BF54x Framebuffer driver

   *
   *
   * Modified:

   *               Copyright 2007-2008 Analog Devices Inc.

   *
   * Bugs:         Enter bugs at http://blackfin.uclinux.org/
   *
   * 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.
   *
   * This program is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU General Public License for more details.
   *
   * You should have received a copy of the GNU General Public License
   * along with this program; if not, see the file COPYING, or write
   * to the Free Software Foundation, Inc.,
   * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
   */
  
  #include <linux/module.h>
  #include <linux/kernel.h>
  #include <linux/errno.h>
  #include <linux/string.h>
  #include <linux/mm.h>
  #include <linux/tty.h>
  #include <linux/slab.h>
  #include <linux/delay.h>
  #include <linux/fb.h>
  #include <linux/ioport.h>
  #include <linux/init.h>
  #include <linux/types.h>
  #include <linux/interrupt.h>
  #include <linux/sched.h>
  #include <linux/timer.h>
  #include <linux/device.h>
  #include <linux/backlight.h>
  #include <linux/lcd.h>
  #include <linux/spinlock.h>
  #include <linux/dma-mapping.h>
  #include <linux/platform_device.h>
  
  #include <asm/blackfin.h>
  #include <asm/irq.h>
  #include <asm/dpmc.h>
  #include <asm/dma-mapping.h>
  #include <asm/dma.h>
  #include <asm/gpio.h>
  #include <asm/portmux.h>

  #include <mach/bf54x-lq043.h>

  
  #define NO_BL_SUPPORT
  
  #define DRIVER_NAME "bf54x-lq043"
  static char driver_name[] = DRIVER_NAME;
  
  #define BFIN_LCD_NBR_PALETTE_ENTRIES	256
  
  #define EPPI0_18 {P_PPI0_CLK, P_PPI0_FS1, P_PPI0_FS2, P_PPI0_D0, P_PPI0_D1, P_PPI0_D2, P_PPI0_D3, \
   P_PPI0_D4, P_PPI0_D5, P_PPI0_D6, P_PPI0_D7, P_PPI0_D8, P_PPI0_D9, P_PPI0_D10, \
   P_PPI0_D11, P_PPI0_D12, P_PPI0_D13, P_PPI0_D14, P_PPI0_D15, P_PPI0_D16, P_PPI0_D17, 0}
  
  #define EPPI0_24 {P_PPI0_D18, P_PPI0_D19, P_PPI0_D20, P_PPI0_D21, P_PPI0_D22, P_PPI0_D23, 0}
  
  struct bfin_bf54xfb_info {
  	struct fb_info *fb;
  	struct device *dev;
  
  	struct bfin_bf54xfb_mach_info *mach_info;
  
  	unsigned char *fb_buffer;	/* RGB Buffer */
  
  	dma_addr_t dma_handle;

  	int lq043_open_cnt;
  	int irq;
  	spinlock_t lock;	/* lock */
  };
  
  static int nocursor;
  module_param(nocursor, int, 0644);
  MODULE_PARM_DESC(nocursor, "cursor enable/disable");
  
  static int outp_rgb666;
  module_param(outp_rgb666, int, 0);
  MODULE_PARM_DESC(outp_rgb666, "Output 18-bit RGB666");
  
  #define LCD_X_RES		480	/*Horizontal Resolution */
  #define LCD_Y_RES		272	/* Vertical Resolution */
  
  #define LCD_BPP			24	/* Bit Per Pixel */
  #define	DMA_BUS_SIZE		32
  
  /* 	-- Horizontal synchronizing --
   *
   * Timing characteristics taken from the SHARP LQ043T1DG01 datasheet
   * (LCY-W-06602A Page 9 of 22)
   *
   * Clock Frequency 	1/Tc Min 7.83 Typ 9.00 Max 9.26 MHz
   *
   * Period 		TH - 525 - Clock
   * Pulse width 		THp - 41 - Clock
   * Horizontal period 	THd - 480 - Clock
   * Back porch 		THb - 2 - Clock
   * Front porch 		THf - 2 - Clock
   *
   * -- Vertical synchronizing --
   * Period 		TV - 286 - Line
   * Pulse width 		TVp - 10 - Line
   * Vertical period 	TVd - 272 - Line
   * Back porch 		TVb - 2 - Line
   * Front porch 		TVf - 2 - Line
   */
  
  #define	LCD_CLK         	(8*1000*1000)	/* 8MHz */
  
  /* # active data to transfer after Horizontal Delay clock */
  #define EPPI_HCOUNT		LCD_X_RES
  
  /* # active lines to transfer after Vertical Delay clock */
  #define EPPI_VCOUNT		LCD_Y_RES
  
  /* Samples per Line = 480 (active data) + 45 (padding) */
  #define EPPI_LINE		525
  
  /* Lines per Frame = 272 (active data) + 14 (padding) */
  #define EPPI_FRAME		286
  
  /* FS1 (Hsync) Width (Typical)*/
  #define EPPI_FS1W_HBL		41
  
  /* FS1 (Hsync) Period (Typical) */
  #define EPPI_FS1P_AVPL		EPPI_LINE
  
  /* Horizontal Delay clock after assertion of Hsync (Typical) */
  #define EPPI_HDELAY		43
  
  /* FS2 (Vsync) Width    = FS1 (Hsync) Period * 10 */
  #define EPPI_FS2W_LVB		(EPPI_LINE * 10)
  
   /* FS2 (Vsync) Period   = FS1 (Hsync) Period * Lines per Frame */
  #define EPPI_FS2P_LAVF		(EPPI_LINE * EPPI_FRAME)
  
  /* Vertical Delay after assertion of Vsync (2 Lines) */
  #define EPPI_VDELAY		12
  
  #define EPPI_CLIP		0xFF00FF00
  
  /* EPPI Control register configuration value for RGB out
   * - EPPI as Output
   * GP 2 frame sync mode,
   * Internal Clock generation disabled, Internal FS generation enabled,
   * Receives samples on EPPI_CLK raising edge, Transmits samples on EPPI_CLK falling edge,
   * FS1 & FS2 are active high,
   * DLEN = 6 (24 bits for RGB888 out) or 5 (18 bits for RGB666 out)
   * DMA Unpacking disabled when RGB Formating is enabled, otherwise DMA unpacking enabled
   * Swapping Enabled,
   * One (DMA) Channel Mode,
   * RGB Formatting Enabled for RGB666 output, disabled for RGB888 output
   * Regular watermark - when FIFO is 100% full,
   * Urgent watermark - when FIFO is 75% full
   */
  
  #define EPPI_CONTROL		(0x20136E2E | SWAPEN)
  
  static inline u16 get_eppi_clkdiv(u32 target_ppi_clk)
  {
  	u32 sclk = get_sclk();
  
  	/* EPPI_CLK = (SCLK) / (2 * (EPPI_CLKDIV[15:0] + 1)) */
  
  	return (((sclk / target_ppi_clk) / 2) - 1);
  }
  
  static void config_ppi(struct bfin_bf54xfb_info *fbi)
  {
  
  	u16 eppi_clkdiv = get_eppi_clkdiv(LCD_CLK);
  
  	bfin_write_EPPI0_FS1W_HBL(EPPI_FS1W_HBL);
  	bfin_write_EPPI0_FS1P_AVPL(EPPI_FS1P_AVPL);
  	bfin_write_EPPI0_FS2W_LVB(EPPI_FS2W_LVB);
  	bfin_write_EPPI0_FS2P_LAVF(EPPI_FS2P_LAVF);
  	bfin_write_EPPI0_CLIP(EPPI_CLIP);
  
  	bfin_write_EPPI0_FRAME(EPPI_FRAME);
  	bfin_write_EPPI0_LINE(EPPI_LINE);
  
  	bfin_write_EPPI0_HCOUNT(EPPI_HCOUNT);
  	bfin_write_EPPI0_HDELAY(EPPI_HDELAY);
  	bfin_write_EPPI0_VCOUNT(EPPI_VCOUNT);
  	bfin_write_EPPI0_VDELAY(EPPI_VDELAY);
  
  	bfin_write_EPPI0_CLKDIV(eppi_clkdiv);
  
  /*
   * DLEN = 6 (24 bits for RGB888 out) or 5 (18 bits for RGB666 out)
   * RGB Formatting Enabled for RGB666 output, disabled for RGB888 output
   */
  	if (outp_rgb666)
  		bfin_write_EPPI0_CONTROL((EPPI_CONTROL & ~DLENGTH) | DLEN_18 |
  					 RGB_FMT_EN);
  	else
  		bfin_write_EPPI0_CONTROL(((EPPI_CONTROL & ~DLENGTH) | DLEN_24) &
  					 ~RGB_FMT_EN);
  
  
  }
  
  static int config_dma(struct bfin_bf54xfb_info *fbi)
  {
  
  	set_dma_config(CH_EPPI0,
  		       set_bfin_dma_config(DIR_READ, DMA_FLOW_AUTO,
  					   INTR_DISABLE, DIMENSION_2D,

  					   DATA_SIZE_32,
  					   DMA_NOSYNC_KEEP_DMA_BUF));

  	set_dma_x_count(CH_EPPI0, (LCD_X_RES * LCD_BPP) / DMA_BUS_SIZE);
  	set_dma_x_modify(CH_EPPI0, DMA_BUS_SIZE / 8);
  	set_dma_y_count(CH_EPPI0, LCD_Y_RES);
  	set_dma_y_modify(CH_EPPI0, DMA_BUS_SIZE / 8);
  	set_dma_start_addr(CH_EPPI0, (unsigned long)fbi->fb_buffer);
  
  	return 0;
  }
  
  static int request_ports(struct bfin_bf54xfb_info *fbi)
  {
  
  	u16 eppi_req_18[] = EPPI0_18;
  	u16 disp = fbi->mach_info->disp;

  	if (gpio_request(disp, DRIVER_NAME)) {

  		printk(KERN_ERR "Requesting GPIO %d failed
  ", disp);

  		return -EFAULT;
  	}
  
  	if (peripheral_request_list(eppi_req_18, DRIVER_NAME)) {

  		printk(KERN_ERR "Requesting Peripherals failed
  ");

  		gpio_free(disp);
  		return -EFAULT;
  	}
  
  	if (!outp_rgb666) {
  
  		u16 eppi_req_24[] = EPPI0_24;
  
  		if (peripheral_request_list(eppi_req_24, DRIVER_NAME)) {

  			printk(KERN_ERR "Requesting Peripherals failed
  ");

  			peripheral_free_list(eppi_req_18);
  			gpio_free(disp);
  			return -EFAULT;
  		}
  	}

  	gpio_direction_output(disp, 1);

  
  	return 0;
  }
  
  static void free_ports(struct bfin_bf54xfb_info *fbi)
  {
  
  	u16 eppi_req_18[] = EPPI0_18;
  
  	gpio_free(fbi->mach_info->disp);
  
  	peripheral_free_list(eppi_req_18);
  
  	if (!outp_rgb666) {
  		u16 eppi_req_24[] = EPPI0_24;
  		peripheral_free_list(eppi_req_24);
  	}
  }
  
  static int bfin_bf54x_fb_open(struct fb_info *info, int user)
  {
  	struct bfin_bf54xfb_info *fbi = info->par;
  
  	spin_lock(&fbi->lock);
  	fbi->lq043_open_cnt++;
  
  	if (fbi->lq043_open_cnt <= 1) {
  
  		bfin_write_EPPI0_CONTROL(0);
  		SSYNC();
  
  		config_dma(fbi);
  		config_ppi(fbi);
  
  		/* start dma */
  		enable_dma(CH_EPPI0);
  		bfin_write_EPPI0_CONTROL(bfin_read_EPPI0_CONTROL() | EPPI_EN);
  	}
  
  	spin_unlock(&fbi->lock);
  
  	return 0;
  }
  
  static int bfin_bf54x_fb_release(struct fb_info *info, int user)
  {
  	struct bfin_bf54xfb_info *fbi = info->par;
  
  	spin_lock(&fbi->lock);
  
  	fbi->lq043_open_cnt--;

  
  	if (fbi->lq043_open_cnt <= 0) {
  
  		bfin_write_EPPI0_CONTROL(0);
  		SSYNC();
  		disable_dma(CH_EPPI0);

  	}
  
  	spin_unlock(&fbi->lock);
  
  	return 0;
  }
  
  static int bfin_bf54x_fb_check_var(struct fb_var_screeninfo *var,
  				   struct fb_info *info)
  {

  	switch (var->bits_per_pixel) {
  	case 24:/* TRUECOLOUR, 16m */
  		var->red.offset = 16;
  		var->green.offset = 8;
  		var->blue.offset = 0;
  		var->red.length = var->green.length = var->blue.length = 8;
  		var->transp.offset = 0;
  		var->transp.length = 0;
  		var->transp.msb_right = 0;
  		var->red.msb_right = 0;
  		var->green.msb_right = 0;
  		var->blue.msb_right = 0;
  		break;
  	default:

  		pr_debug("%s: depth not supported: %u BPP
  ", __func__,

  			 var->bits_per_pixel);
  		return -EINVAL;
  	}
  
  	if (info->var.xres != var->xres || info->var.yres != var->yres ||
  	    info->var.xres_virtual != var->xres_virtual ||
  	    info->var.yres_virtual != var->yres_virtual) {
  		pr_debug("%s: Resolution not supported: X%u x Y%u 
  ",

  			 __func__, var->xres, var->yres);

  		return -EINVAL;
  	}
  
  	/*
  	 *  Memory limit
  	 */
  
  	if ((info->fix.line_length * var->yres_virtual) > info->fix.smem_len) {
  		pr_debug("%s: Memory Limit requested yres_virtual = %u
  ",

  			 __func__, var->yres_virtual);

  		return -ENOMEM;
  	}
  
  	return 0;
  }

  int bfin_bf54x_fb_cursor(struct fb_info *info, struct fb_cursor *cursor)
  {
  	if (nocursor)
  		return 0;
  	else
  		return -EINVAL;	/* just to force soft_cursor() call */
  }
  
  static int bfin_bf54x_fb_setcolreg(u_int regno, u_int red, u_int green,
  				   u_int blue, u_int transp,
  				   struct fb_info *info)
  {
  	if (regno >= BFIN_LCD_NBR_PALETTE_ENTRIES)
  		return -EINVAL;
  
  	if (info->var.grayscale) {
  		/* grayscale = 0.30*R + 0.59*G + 0.11*B */
  		red = green = blue = (red * 77 + green * 151 + blue * 28) >> 8;
  	}
  
  	if (info->fix.visual == FB_VISUAL_TRUECOLOR) {
  
  		u32 value;
  		/* Place color in the pseudopalette */
  		if (regno > 16)
  			return -EINVAL;
  
  		red >>= (16 - info->var.red.length);
  		green >>= (16 - info->var.green.length);
  		blue >>= (16 - info->var.blue.length);
  
  		value = (red << info->var.red.offset) |
  		    (green << info->var.green.offset) |
  		    (blue << info->var.blue.offset);
  		value &= 0xFFFFFF;
  
  		((u32 *) (info->pseudo_palette))[regno] = value;
  
  	}
  
  	return 0;
  }
  
  static struct fb_ops bfin_bf54x_fb_ops = {
  	.owner = THIS_MODULE,
  	.fb_open = bfin_bf54x_fb_open,
  	.fb_release = bfin_bf54x_fb_release,
  	.fb_check_var = bfin_bf54x_fb_check_var,
  	.fb_fillrect = cfb_fillrect,
  	.fb_copyarea = cfb_copyarea,
  	.fb_imageblit = cfb_imageblit,

  	.fb_cursor = bfin_bf54x_fb_cursor,
  	.fb_setcolreg = bfin_bf54x_fb_setcolreg,
  };
  
  #ifndef NO_BL_SUPPORT
  static int bl_get_brightness(struct backlight_device *bd)
  {
  	return 0;
  }

  static const struct backlight_ops bfin_lq043fb_bl_ops = {

  	.get_brightness = bl_get_brightness,
  };
  
  static struct backlight_device *bl_dev;
  
  static int bfin_lcd_get_power(struct lcd_device *dev)
  {
  	return 0;
  }
  
  static int bfin_lcd_set_power(struct lcd_device *dev, int power)
  {
  	return 0;
  }
  
  static int bfin_lcd_get_contrast(struct lcd_device *dev)
  {
  	return 0;
  }
  
  static int bfin_lcd_set_contrast(struct lcd_device *dev, int contrast)
  {
  
  	return 0;
  }

  static int bfin_lcd_check_fb(struct lcd_device *dev, struct fb_info *fi)

  {
  	if (!fi || (fi == &bfin_bf54x_fb))
  		return 1;
  	return 0;
  }
  
  static struct lcd_ops bfin_lcd_ops = {
  	.get_power = bfin_lcd_get_power,
  	.set_power = bfin_lcd_set_power,
  	.get_contrast = bfin_lcd_get_contrast,
  	.set_contrast = bfin_lcd_set_contrast,
  	.check_fb = bfin_lcd_check_fb,
  };
  
  static struct lcd_device *lcd_dev;
  #endif
  
  static irqreturn_t bfin_bf54x_irq_error(int irq, void *dev_id)
  {

  	/*struct bfin_bf54xfb_info *info = dev_id;*/

  
  	u16 status = bfin_read_EPPI0_STATUS();
  
  	bfin_write_EPPI0_STATUS(0xFFFF);
  
  	if (status) {
  		bfin_write_EPPI0_CONTROL(bfin_read_EPPI0_CONTROL() & ~EPPI_EN);
  		disable_dma(CH_EPPI0);
  
  		/* start dma */
  		enable_dma(CH_EPPI0);
  		bfin_write_EPPI0_CONTROL(bfin_read_EPPI0_CONTROL() | EPPI_EN);
  		bfin_write_EPPI0_STATUS(0xFFFF);
  	}
  
  	return IRQ_HANDLED;
  }

  static int __devinit bfin_bf54x_probe(struct platform_device *pdev)

  {

  #ifndef NO_BL_SUPPORT

  	struct backlight_properties props;

  #endif

  	struct bfin_bf54xfb_info *info;
  	struct fb_info *fbinfo;
  	int ret;
  
  	printk(KERN_INFO DRIVER_NAME ": FrameBuffer initializing...
  ");
  
  	if (request_dma(CH_EPPI0, "CH_EPPI0") < 0) {
  		printk(KERN_ERR DRIVER_NAME
  		       ": couldn't request CH_EPPI0 DMA
  ");
  		ret = -EFAULT;
  		goto out1;
  	}
  
  	fbinfo =
  	    framebuffer_alloc(sizeof(struct bfin_bf54xfb_info), &pdev->dev);
  	if (!fbinfo) {
  		ret = -ENOMEM;
  		goto out2;
  	}
  
  	info = fbinfo->par;
  	info->fb = fbinfo;
  	info->dev = &pdev->dev;
  
  	platform_set_drvdata(pdev, fbinfo);
  
  	strcpy(fbinfo->fix.id, driver_name);
  
  	info->mach_info = pdev->dev.platform_data;
  
  	if (info->mach_info == NULL) {
  		dev_err(&pdev->dev,
  			"no platform data for lcd, cannot attach
  ");
  		ret = -EINVAL;
  		goto out3;
  	}
  
  	fbinfo->fix.type = FB_TYPE_PACKED_PIXELS;
  	fbinfo->fix.type_aux = 0;
  	fbinfo->fix.xpanstep = 0;
  	fbinfo->fix.ypanstep = 0;
  	fbinfo->fix.ywrapstep = 0;
  	fbinfo->fix.accel = FB_ACCEL_NONE;
  	fbinfo->fix.visual = FB_VISUAL_TRUECOLOR;
  
  	fbinfo->var.nonstd = 0;
  	fbinfo->var.activate = FB_ACTIVATE_NOW;
  	fbinfo->var.height = info->mach_info->height;
  	fbinfo->var.width = info->mach_info->width;
  	fbinfo->var.accel_flags = 0;
  	fbinfo->var.vmode = FB_VMODE_NONINTERLACED;
  
  	fbinfo->fbops = &bfin_bf54x_fb_ops;
  	fbinfo->flags = FBINFO_FLAG_DEFAULT;
  
  	fbinfo->var.xres = info->mach_info->xres.defval;
  	fbinfo->var.xres_virtual = info->mach_info->xres.defval;
  	fbinfo->var.yres = info->mach_info->yres.defval;
  	fbinfo->var.yres_virtual = info->mach_info->yres.defval;
  	fbinfo->var.bits_per_pixel = info->mach_info->bpp.defval;
  
  	fbinfo->var.upper_margin = 0;
  	fbinfo->var.lower_margin = 0;
  	fbinfo->var.vsync_len = 0;
  
  	fbinfo->var.left_margin = 0;
  	fbinfo->var.right_margin = 0;
  	fbinfo->var.hsync_len = 0;
  
  	fbinfo->var.red.offset = 16;
  	fbinfo->var.green.offset = 8;
  	fbinfo->var.blue.offset = 0;
  	fbinfo->var.transp.offset = 0;
  	fbinfo->var.red.length = 8;
  	fbinfo->var.green.length = 8;
  	fbinfo->var.blue.length = 8;
  	fbinfo->var.transp.length = 0;
  	fbinfo->fix.smem_len = info->mach_info->xres.max *
  	    info->mach_info->yres.max * info->mach_info->bpp.max / 8;
  
  	fbinfo->fix.line_length = fbinfo->var.xres_virtual *
  	    fbinfo->var.bits_per_pixel / 8;
  
  	info->fb_buffer =
  	    dma_alloc_coherent(NULL, fbinfo->fix.smem_len, &info->dma_handle,
  			       GFP_KERNEL);
  
  	if (NULL == info->fb_buffer) {
  		printk(KERN_ERR DRIVER_NAME
  		       ": couldn't allocate dma buffer.
  ");
  		ret = -ENOMEM;
  		goto out3;
  	}

  	fbinfo->screen_base = (void *)info->fb_buffer;
  	fbinfo->fix.smem_start = (int)info->fb_buffer;
  
  	fbinfo->fbops = &bfin_bf54x_fb_ops;

  	fbinfo->pseudo_palette = kzalloc(sizeof(u32) * 16, GFP_KERNEL);

  	if (!fbinfo->pseudo_palette) {
  		printk(KERN_ERR DRIVER_NAME
  		       "Fail to allocate pseudo_palette
  ");
  
  		ret = -ENOMEM;
  		goto out4;
  	}

  	if (fb_alloc_cmap(&fbinfo->cmap, BFIN_LCD_NBR_PALETTE_ENTRIES, 0)
  	    < 0) {
  		printk(KERN_ERR DRIVER_NAME
  		       "Fail to allocate colormap (%d entries)
  ",
  		       BFIN_LCD_NBR_PALETTE_ENTRIES);
  		ret = -EFAULT;
  		goto out5;
  	}
  
  	if (request_ports(info)) {
  		printk(KERN_ERR DRIVER_NAME ": couldn't request gpio port.
  ");
  		ret = -EFAULT;
  		goto out6;
  	}
  
  	info->irq = platform_get_irq(pdev, 0);
  	if (info->irq < 0) {
  		ret = -EINVAL;
  		goto out7;
  	}

  	if (request_irq(info->irq, bfin_bf54x_irq_error, 0,

  			"PPI ERROR", info) < 0) {
  		printk(KERN_ERR DRIVER_NAME
  		       ": unable to request PPI ERROR IRQ
  ");
  		ret = -EFAULT;
  		goto out7;
  	}
  
  	if (register_framebuffer(fbinfo) < 0) {
  		printk(KERN_ERR DRIVER_NAME
  		       ": unable to register framebuffer.
  ");
  		ret = -EINVAL;
  		goto out8;
  	}
  #ifndef NO_BL_SUPPORT

  	memset(&props, 0, sizeof(struct backlight_properties));

  	props.type = BACKLIGHT_RAW;

  	props.max_brightness = 255;
  	bl_dev = backlight_device_register("bf54x-bl", NULL, NULL,
  					   &bfin_lq043fb_bl_ops, &props);

  	if (IS_ERR(bl_dev)) {
  		printk(KERN_ERR DRIVER_NAME
  			": unable to register backlight.
  ");
  		ret = -EINVAL;

  		unregister_framebuffer(fbinfo);
  		goto out8;

  	}

  	lcd_dev = lcd_device_register(DRIVER_NAME, &pdev->dev, NULL, &bfin_lcd_ops);

  	lcd_dev->props.max_contrast = 255, printk(KERN_INFO "Done.
  ");
  #endif
  
  	return 0;
  
  out8:
  	free_irq(info->irq, info);
  out7:
  	free_ports(info);
  out6:
  	fb_dealloc_cmap(&fbinfo->cmap);
  out5:
  	kfree(fbinfo->pseudo_palette);
  out4:
  	dma_free_coherent(NULL, fbinfo->fix.smem_len, info->fb_buffer,
  			  info->dma_handle);
  out3:
  	framebuffer_release(fbinfo);
  out2:
  	free_dma(CH_EPPI0);
  out1:
  	platform_set_drvdata(pdev, NULL);
  
  	return ret;
  }

  static int __devexit bfin_bf54x_remove(struct platform_device *pdev)

  {
  
  	struct fb_info *fbinfo = platform_get_drvdata(pdev);
  	struct bfin_bf54xfb_info *info = fbinfo->par;
  
  	free_dma(CH_EPPI0);
  	free_irq(info->irq, info);
  
  	if (info->fb_buffer != NULL)
  		dma_free_coherent(NULL, fbinfo->fix.smem_len, info->fb_buffer,
  				  info->dma_handle);
  
  	kfree(fbinfo->pseudo_palette);
  	fb_dealloc_cmap(&fbinfo->cmap);
  
  #ifndef NO_BL_SUPPORT
  	lcd_device_unregister(lcd_dev);
  	backlight_device_unregister(bl_dev);
  #endif
  
  	unregister_framebuffer(fbinfo);
  
  	free_ports(info);
  
  	printk(KERN_INFO DRIVER_NAME ": Unregister LCD driver.
  ");
  
  	return 0;
  }
  
  #ifdef CONFIG_PM
  static int bfin_bf54x_suspend(struct platform_device *pdev, pm_message_t state)
  {
  	struct fb_info *fbinfo = platform_get_drvdata(pdev);

  
  	bfin_write_EPPI0_CONTROL(bfin_read_EPPI0_CONTROL() & ~EPPI_EN);
  	disable_dma(CH_EPPI0);
  	bfin_write_EPPI0_STATUS(0xFFFF);
  
  	return 0;
  }
  
  static int bfin_bf54x_resume(struct platform_device *pdev)
  {
  	struct fb_info *fbinfo = platform_get_drvdata(pdev);
  	struct bfin_bf54xfb_info *info = fbinfo->par;

  	if (info->lq043_open_cnt) {
  
  		bfin_write_EPPI0_CONTROL(0);
  		SSYNC();
  
  		config_dma(info);
  		config_ppi(info);
  
  		/* start dma */
  		enable_dma(CH_EPPI0);
  		bfin_write_EPPI0_CONTROL(bfin_read_EPPI0_CONTROL() | EPPI_EN);
  	}

  
  	return 0;
  }
  #else
  #define bfin_bf54x_suspend	NULL
  #define bfin_bf54x_resume	NULL
  #endif
  
  static struct platform_driver bfin_bf54x_driver = {
  	.probe = bfin_bf54x_probe,

  	.remove = __devexit_p(bfin_bf54x_remove),

  	.suspend = bfin_bf54x_suspend,
  	.resume = bfin_bf54x_resume,
  	.driver = {
  		   .name = DRIVER_NAME,
  		   .owner = THIS_MODULE,
  		   },
  };

  static int __init bfin_bf54x_driver_init(void)

  {
  	return platform_driver_register(&bfin_bf54x_driver);
  }
  
  static void __exit bfin_bf54x_driver_cleanup(void)
  {
  	platform_driver_unregister(&bfin_bf54x_driver);
  }
  
  MODULE_DESCRIPTION("Blackfin BF54x TFT LCD Driver");
  MODULE_LICENSE("GPL");
  
  module_init(bfin_bf54x_driver_init);
  module_exit(bfin_bf54x_driver_cleanup);