/*
   * File:         drivers/video/bfin-t350mcqb-fb.c
   * Based on:
   * Author:       Michael Hennerich <hennerich@blackfin.uclinux.org>
   *
   * Created:

   * Description:  Blackfin LCD Framebuffer driver

   *
   *
   * Modified:
   *               Copyright 2004-2007 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/gfp.h>

  #include <linux/fb.h>
  #include <linux/init.h>
  #include <linux/types.h>
  #include <linux/interrupt.h>
  #include <linux/device.h>
  #include <linux/backlight.h>
  #include <linux/lcd.h>
  #include <linux/dma-mapping.h>
  #include <linux/platform_device.h>
  
  #include <asm/blackfin.h>
  #include <asm/irq.h>
  #include <asm/dma-mapping.h>
  #include <asm/dma.h>
  #include <asm/portmux.h>
  #include <asm/gptimers.h>
  
  #define NO_BL_SUPPORT
  
  #define LCD_X_RES		320	/* Horizontal Resolution */
  #define LCD_Y_RES		240	/* Vertical Resolution */
  #define LCD_BPP			24	/* Bit Per Pixel */
  
  #define	DMA_BUS_SIZE		16
  #define	LCD_CLK         	(12*1000*1000)	/* 12MHz */
  
  #define CLOCKS_PER_PIX		3
  
  	/*
  	 * HS and VS timing parameters (all in number of PPI clk ticks)
  	 */
  
  #define U_LINE		1				/* Blanking Lines */
  
  #define H_ACTPIX	(LCD_X_RES * CLOCKS_PER_PIX)	/* active horizontal pixel */
  #define H_PERIOD	(408 * CLOCKS_PER_PIX)		/* HS period */
  #define H_PULSE		90				/* HS pulse width */
  #define H_START		204				/* first valid pixel */
  
  #define	V_LINES		(LCD_Y_RES + U_LINE)		/* total vertical lines */
  #define V_PULSE		(3 * H_PERIOD)			/* VS pulse width (1-5 H_PERIODs) */
  #define V_PERIOD	(H_PERIOD * V_LINES)		/* VS period */
  
  #define ACTIVE_VIDEO_MEM_OFFSET	(U_LINE * H_ACTPIX)
  
  #define BFIN_LCD_NBR_PALETTE_ENTRIES	256
  
  #define DRIVER_NAME "bfin-t350mcqb"
  static char driver_name[] = DRIVER_NAME;
  
  struct bfin_t350mcqbfb_info {
  	struct fb_info *fb;
  	struct device *dev;
  	unsigned char *fb_buffer;	/* RGB Buffer */
  	dma_addr_t dma_handle;

  	int lq043_open_cnt;
  	int irq;
  	spinlock_t lock;	/* lock */

  	u32 pseudo_pal[16];

  };
  
  static int nocursor;
  module_param(nocursor, int, 0644);
  MODULE_PARM_DESC(nocursor, "cursor enable/disable");
  
  #define PPI_TX_MODE		0x2
  #define PPI_XFER_TYPE_11	0xC
  #define PPI_PORT_CFG_01		0x10
  #define PPI_PACK_EN		0x80
  #define PPI_POLS_1		0x8000
  
  static void bfin_t350mcqb_config_ppi(struct bfin_t350mcqbfb_info *fbi)
  {
  	bfin_write_PPI_DELAY(H_START);
  	bfin_write_PPI_COUNT(H_ACTPIX-1);
  	bfin_write_PPI_FRAME(V_LINES);
  
  	bfin_write_PPI_CONTROL(PPI_TX_MODE |	   /* output mode , PORT_DIR */
  				PPI_XFER_TYPE_11 | /* sync mode XFR_TYPE */
  				PPI_PORT_CFG_01 |  /* two frame sync PORT_CFG */
  				PPI_PACK_EN |	   /* packing enabled PACK_EN */
  				PPI_POLS_1);	   /* faling edge syncs POLS */
  }
  
  static inline void bfin_t350mcqb_disable_ppi(void)
  {
  	bfin_write_PPI_CONTROL(bfin_read_PPI_CONTROL() & ~PORT_EN);
  }
  
  static inline void bfin_t350mcqb_enable_ppi(void)
  {
  	bfin_write_PPI_CONTROL(bfin_read_PPI_CONTROL() | PORT_EN);
  }
  
  static void bfin_t350mcqb_start_timers(void)
  {
  	unsigned long flags;
  
  	local_irq_save(flags);
  		enable_gptimers(TIMER1bit);
  		enable_gptimers(TIMER0bit);
  	local_irq_restore(flags);
  }
  
  static void bfin_t350mcqb_stop_timers(void)
  {
  	disable_gptimers(TIMER0bit | TIMER1bit);
  
  	set_gptimer_status(0, TIMER_STATUS_TRUN0 | TIMER_STATUS_TRUN1 |
  				TIMER_STATUS_TIMIL0 | TIMER_STATUS_TIMIL1 |
  				 TIMER_STATUS_TOVF0 | TIMER_STATUS_TOVF1);
  
  }
  
  static void bfin_t350mcqb_init_timers(void)
  {
  
  	bfin_t350mcqb_stop_timers();
  
  	set_gptimer_period(TIMER0_id, H_PERIOD);
  	set_gptimer_pwidth(TIMER0_id, H_PULSE);
  	set_gptimer_config(TIMER0_id, TIMER_MODE_PWM | TIMER_PERIOD_CNT |
  				      TIMER_TIN_SEL | TIMER_CLK_SEL|
  				      TIMER_EMU_RUN);
  
  	set_gptimer_period(TIMER1_id, V_PERIOD);
  	set_gptimer_pwidth(TIMER1_id, V_PULSE);
  	set_gptimer_config(TIMER1_id, TIMER_MODE_PWM | TIMER_PERIOD_CNT |
  				      TIMER_TIN_SEL | TIMER_CLK_SEL |
  				      TIMER_EMU_RUN);
  
  }
  
  static void bfin_t350mcqb_config_dma(struct bfin_t350mcqbfb_info *fbi)
  {
  
  	set_dma_config(CH_PPI,
  		       set_bfin_dma_config(DIR_READ, DMA_FLOW_AUTO,
  					   INTR_DISABLE, DIMENSION_2D,
  					   DATA_SIZE_16,
  					   DMA_NOSYNC_KEEP_DMA_BUF));
  	set_dma_x_count(CH_PPI, (LCD_X_RES * LCD_BPP) / DMA_BUS_SIZE);
  	set_dma_x_modify(CH_PPI, DMA_BUS_SIZE / 8);
  	set_dma_y_count(CH_PPI, V_LINES);
  
  	set_dma_y_modify(CH_PPI, DMA_BUS_SIZE / 8);
  	set_dma_start_addr(CH_PPI, (unsigned long)fbi->fb_buffer);
  
  }

  static	u16 ppi0_req_8[] = {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, 0};

  static int bfin_t350mcqb_request_ports(int action)
  {

  	if (action) {
  		if (peripheral_request_list(ppi0_req_8, DRIVER_NAME)) {

  			printk(KERN_ERR "Requesting Peripherals failed
  ");

  			return -EFAULT;
  		}
  	} else
  		peripheral_free_list(ppi0_req_8);
  
  	return 0;
  }
  
  static int bfin_t350mcqb_fb_open(struct fb_info *info, int user)
  {
  	struct bfin_t350mcqbfb_info *fbi = info->par;
  
  	spin_lock(&fbi->lock);
  	fbi->lq043_open_cnt++;
  
  	if (fbi->lq043_open_cnt <= 1) {
  
  		bfin_t350mcqb_disable_ppi();
  		SSYNC();
  
  		bfin_t350mcqb_config_dma(fbi);
  		bfin_t350mcqb_config_ppi(fbi);
  		bfin_t350mcqb_init_timers();
  
  		/* start dma */
  		enable_dma(CH_PPI);
  		bfin_t350mcqb_enable_ppi();
  		bfin_t350mcqb_start_timers();
  	}
  
  	spin_unlock(&fbi->lock);
  
  	return 0;
  }
  
  static int bfin_t350mcqb_fb_release(struct fb_info *info, int user)
  {
  	struct bfin_t350mcqbfb_info *fbi = info->par;
  
  	spin_lock(&fbi->lock);
  
  	fbi->lq043_open_cnt--;

  
  	if (fbi->lq043_open_cnt <= 0) {
  		bfin_t350mcqb_disable_ppi();
  		SSYNC();
  		disable_dma(CH_PPI);
  		bfin_t350mcqb_stop_timers();

  	}
  
  	spin_unlock(&fbi->lock);
  
  	return 0;
  }
  
  static int bfin_t350mcqb_fb_check_var(struct fb_var_screeninfo *var,
  				   struct fb_info *info)
  {

  	switch (var->bits_per_pixel) {
  	case 24:/* TRUECOLOUR, 16m */
  		var->red.offset = 0;
  		var->green.offset = 8;
  		var->blue.offset = 16;
  		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_t350mcqb_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_t350mcqb_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_t350mcqb_fb_ops = {
  	.owner = THIS_MODULE,
  	.fb_open = bfin_t350mcqb_fb_open,
  	.fb_release = bfin_t350mcqb_fb_release,
  	.fb_check_var = bfin_t350mcqb_fb_check_var,
  	.fb_fillrect = cfb_fillrect,
  	.fb_copyarea = cfb_copyarea,
  	.fb_imageblit = cfb_imageblit,

  	.fb_cursor = bfin_t350mcqb_fb_cursor,
  	.fb_setcolreg = bfin_t350mcqb_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_t350mcqb_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_t350mcqb_irq_error(int irq, void *dev_id)
  {
  	/*struct bfin_t350mcqbfb_info *info = (struct bfin_t350mcqbfb_info *)dev_id;*/
  
  	u16 status = bfin_read_PPI_STATUS();
  	bfin_write_PPI_STATUS(0xFFFF);
  
  	if (status) {
  		bfin_t350mcqb_disable_ppi();
  		disable_dma(CH_PPI);
  
  		/* start dma */
  		enable_dma(CH_PPI);
  		bfin_t350mcqb_enable_ppi();
  		bfin_write_PPI_STATUS(0xFFFF);
  	}
  
  	return IRQ_HANDLED;
  }

  static int __devinit bfin_t350mcqb_probe(struct platform_device *pdev)

  {

  #ifndef NO_BL_SUPPORT

  	struct backlight_properties props;

  #endif

  	struct bfin_t350mcqbfb_info *info;
  	struct fb_info *fbinfo;
  	int ret;
  
  	printk(KERN_INFO DRIVER_NAME ": %dx%d %d-bit RGB FrameBuffer initializing...
  ",
  					 LCD_X_RES, LCD_Y_RES, LCD_BPP);
  
  	if (request_dma(CH_PPI, "CH_PPI") < 0) {
  		printk(KERN_ERR DRIVER_NAME
  		       ": couldn't request CH_PPI DMA
  ");
  		ret = -EFAULT;
  		goto out1;
  	}
  
  	fbinfo =
  	    framebuffer_alloc(sizeof(struct bfin_t350mcqbfb_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);
  
  	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 = 53;
  	fbinfo->var.width = 70;

  	fbinfo->var.accel_flags = 0;
  	fbinfo->var.vmode = FB_VMODE_NONINTERLACED;
  
  	fbinfo->var.xres = LCD_X_RES;
  	fbinfo->var.xres_virtual = LCD_X_RES;
  	fbinfo->var.yres = LCD_Y_RES;
  	fbinfo->var.yres_virtual = LCD_Y_RES;
  	fbinfo->var.bits_per_pixel = LCD_BPP;
  
  	fbinfo->var.red.offset = 0;
  	fbinfo->var.green.offset = 8;
  	fbinfo->var.blue.offset = 16;
  	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 = LCD_X_RES * LCD_Y_RES * LCD_BPP / 8;
  
  	fbinfo->fix.line_length = fbinfo->var.xres_virtual *
  	    fbinfo->var.bits_per_pixel / 8;
  
  
  	fbinfo->fbops = &bfin_t350mcqb_fb_ops;
  	fbinfo->flags = FBINFO_FLAG_DEFAULT;

  	info->fb_buffer = dma_alloc_coherent(NULL, fbinfo->fix.smem_len +
  				ACTIVE_VIDEO_MEM_OFFSET,
  				&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 + ACTIVE_VIDEO_MEM_OFFSET;
  	fbinfo->fix.smem_start = (int)info->fb_buffer + ACTIVE_VIDEO_MEM_OFFSET;
  
  	fbinfo->fbops = &bfin_t350mcqb_fb_ops;

  	fbinfo->pseudo_palette = &info->pseudo_pal;

  
  	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 out4;

  	}
  
  	if (bfin_t350mcqb_request_ports(1)) {
  		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;
  	}

  	ret = request_irq(info->irq, bfin_t350mcqb_irq_error, 0,

  			"PPI ERROR", info);
  	if (ret < 0) {

  		printk(KERN_ERR DRIVER_NAME
  		       ": unable to request PPI ERROR IRQ
  ");

  		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("bf52x-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, NULL, &bfin_lcd_ops);
  	lcd_dev->props.max_contrast = 255, printk(KERN_INFO "Done.
  ");
  #endif
  
  	return 0;
  
  out8:
  	free_irq(info->irq, info);
  out7:
  	bfin_t350mcqb_request_ports(0);
  out6:
  	fb_dealloc_cmap(&fbinfo->cmap);

  out4:

  	dma_free_coherent(NULL, fbinfo->fix.smem_len + ACTIVE_VIDEO_MEM_OFFSET,
  			 info->fb_buffer, info->dma_handle);

  out3:
  	framebuffer_release(fbinfo);
  out2:
  	free_dma(CH_PPI);
  out1:
  	platform_set_drvdata(pdev, NULL);
  
  	return ret;
  }

  static int __devexit bfin_t350mcqb_remove(struct platform_device *pdev)

  {
  
  	struct fb_info *fbinfo = platform_get_drvdata(pdev);
  	struct bfin_t350mcqbfb_info *info = fbinfo->par;

  	unregister_framebuffer(fbinfo);

  	free_dma(CH_PPI);
  	free_irq(info->irq, info);
  
  	if (info->fb_buffer != NULL)

  		dma_free_coherent(NULL, fbinfo->fix.smem_len +
  			ACTIVE_VIDEO_MEM_OFFSET, info->fb_buffer,
  			info->dma_handle);

  	fb_dealloc_cmap(&fbinfo->cmap);
  
  #ifndef NO_BL_SUPPORT
  	lcd_device_unregister(lcd_dev);
  	backlight_device_unregister(bl_dev);
  #endif

  	bfin_t350mcqb_request_ports(0);

  	platform_set_drvdata(pdev, NULL);
  	framebuffer_release(fbinfo);

  	printk(KERN_INFO DRIVER_NAME ": Unregister LCD driver.
  ");
  
  	return 0;
  }
  
  #ifdef CONFIG_PM
  static int bfin_t350mcqb_suspend(struct platform_device *pdev, pm_message_t state)
  {

  	struct fb_info *fbinfo = platform_get_drvdata(pdev);
  	struct bfin_t350mcqbfb_info *fbi = fbinfo->par;
  
  	if (fbi->lq043_open_cnt) {
  		bfin_t350mcqb_disable_ppi();
  		disable_dma(CH_PPI);
  		bfin_t350mcqb_stop_timers();
  		bfin_write_PPI_STATUS(-1);
  	}

  
  	return 0;
  }
  
  static int bfin_t350mcqb_resume(struct platform_device *pdev)
  {

  	struct fb_info *fbinfo = platform_get_drvdata(pdev);
  	struct bfin_t350mcqbfb_info *fbi = fbinfo->par;
  
  	if (fbi->lq043_open_cnt) {
  		bfin_t350mcqb_config_dma(fbi);
  		bfin_t350mcqb_config_ppi(fbi);
  		bfin_t350mcqb_init_timers();
  
  		/* start dma */
  		enable_dma(CH_PPI);
  		bfin_t350mcqb_enable_ppi();
  		bfin_t350mcqb_start_timers();
  	}

  
  	return 0;
  }
  #else
  #define bfin_t350mcqb_suspend	NULL
  #define bfin_t350mcqb_resume	NULL
  #endif
  
  static struct platform_driver bfin_t350mcqb_driver = {
  	.probe = bfin_t350mcqb_probe,

  	.remove = __devexit_p(bfin_t350mcqb_remove),

  	.suspend = bfin_t350mcqb_suspend,
  	.resume = bfin_t350mcqb_resume,
  	.driver = {
  		   .name = DRIVER_NAME,
  		   .owner = THIS_MODULE,
  		   },
  };

  static int __init bfin_t350mcqb_driver_init(void)

  {
  	return platform_driver_register(&bfin_t350mcqb_driver);
  }
  
  static void __exit bfin_t350mcqb_driver_cleanup(void)
  {
  	platform_driver_unregister(&bfin_t350mcqb_driver);
  }
  
  MODULE_DESCRIPTION("Blackfin TFT LCD Driver");
  MODULE_LICENSE("GPL");
  
  module_init(bfin_t350mcqb_driver_init);
  module_exit(bfin_t350mcqb_driver_cleanup);