[linux-2.6-block.git] / drivers / video / fbdev / au1100fb.c

/*
 * BRIEF MODULE DESCRIPTION
 *	Au1100 LCD Driver.
 *
 * Rewritten for 2.6 by Embedded Alley Solutions
 * 	<source@embeddedalley.com>, based on submissions by
 *  	Karl Lessard <klessard@sunrisetelecom.com>
 *  	<c.pellegrin@exadron.com>
 *
 * PM support added by Rodolfo Giometti <giometti@linux.it>
 * Cursor enable/disable by Rodolfo Giometti <giometti@linux.it>
 *
 * Copyright 2002 MontaVista Software
 * Author: MontaVista Software, Inc.
 *		ppopov@mvista.com or source@mvista.com
 *
 * Copyright 2002 Alchemy Semiconductor
 * Author: Alchemy Semiconductor
 *
 * Based on:
 * linux/drivers/video/skeletonfb.c -- Skeleton for a frame buffer device
 *  Created 28 Dec 1997 by Geert Uytterhoeven
 *
 *  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  SOFTWARE  IS PROVIDED	  ``AS	IS'' AND   ANY	EXPRESS OR IMPLIED
 *  WARRANTIES,	  INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
 *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
 *  NO	EVENT  SHALL   THE AUTHOR  BE	 LIABLE FOR ANY	  DIRECT, INDIRECT,
 *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 *  NOT LIMITED	  TO, PROCUREMENT OF  SUBSTITUTE GOODS	OR SERVICES; LOSS OF
 *  USE, DATA,	OR PROFITS; OR	BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 *  ANY THEORY OF LIABILITY, WHETHER IN	 CONTRACT, STRICT LIABILITY, OR TORT
 *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 *  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/clk.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/mm.h>
#include <linux/fb.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/ctype.h>
#include <linux/dma-mapping.h>
#include <linux/platform_device.h>
#include <linux/slab.h>

#include <asm/mach-au1x00/au1000.h>

#define DEBUG 0

#include "au1100fb.h"

#define DRIVER_NAME "au1100fb"
#define DRIVER_DESC "LCD controller driver for AU1100 processors"

#define to_au1100fb_device(_info) \
	  (_info ? container_of(_info, struct au1100fb_device, info) : NULL);

/* Bitfields format supported by the controller. Note that the order of formats
 * SHOULD be the same as in the LCD_CONTROL_SBPPF field, so we can retrieve the
 * right pixel format by doing rgb_bitfields[LCD_CONTROL_SBPPF_XXX >> LCD_CONTROL_SBPPF]
 */
struct fb_bitfield rgb_bitfields[][4] =
{
  	/*     Red, 	   Green, 	 Blue, 	     Transp   */
	{ { 10, 6, 0 }, { 5, 5, 0 }, { 0, 5, 0 }, { 0, 0, 0 } },
	{ { 11, 5, 0 }, { 5, 6, 0 }, { 0, 5, 0 }, { 0, 0, 0 } },
	{ { 11, 5, 0 }, { 6, 5, 0 }, { 0, 6, 0 }, { 0, 0, 0 } },
	{ { 10, 5, 0 }, { 5, 5, 0 }, { 0, 5, 0 }, { 15, 1, 0 } },
	{ { 11, 5, 0 }, { 6, 5, 0 }, { 1, 5, 0 }, { 0, 1, 0 } },

	/* The last is used to describe 12bpp format */
	{ { 8, 4, 0 },  { 4, 4, 0 }, { 0, 4, 0 }, { 0, 0, 0 } },
};

static struct fb_fix_screeninfo au1100fb_fix = {
	.id		= "AU1100 FB",
	.xpanstep 	= 1,
	.ypanstep 	= 1,
	.type		= FB_TYPE_PACKED_PIXELS,
	.accel		= FB_ACCEL_NONE,
};

static struct fb_var_screeninfo au1100fb_var = {
	.activate	= FB_ACTIVATE_NOW,
	.height		= -1,
	.width		= -1,
	.vmode		= FB_VMODE_NONINTERLACED,
};

/* fb_blank
 * Blank the screen. Depending on the mode, the screen will be
 * activated with the backlight color, or desactivated
 */
static int au1100fb_fb_blank(int blank_mode, struct fb_info *fbi)
{
	struct au1100fb_device *fbdev = to_au1100fb_device(fbi);

	print_dbg("fb_blank %d %p", blank_mode, fbi);

	switch (blank_mode) {

	case VESA_NO_BLANKING:
		/* Turn on panel */
		fbdev->regs->lcd_control |= LCD_CONTROL_GO;
		wmb(); /* drain writebuffer */
		break;

	case VESA_VSYNC_SUSPEND:
	case VESA_HSYNC_SUSPEND:
	case VESA_POWERDOWN:
		/* Turn off panel */
		fbdev->regs->lcd_control &= ~LCD_CONTROL_GO;
		wmb(); /* drain writebuffer */
		break;
	default:
		break;

	}
	return 0;
}

/*
 * Set hardware with var settings. This will enable the controller with a specific
 * mode, normally validated with the fb_check_var method
	 */
int au1100fb_setmode(struct au1100fb_device *fbdev)
{
	struct fb_info *info = &fbdev->info;
	u32 words;
	int index;

	if (!fbdev)
		return -EINVAL;

	/* Update var-dependent FB info */
	if (panel_is_active(fbdev->panel) || panel_is_color(fbdev->panel)) {
		if (info->var.bits_per_pixel <= 8) {
			/* palettized */
			info->var.red.offset    = 0;
			info->var.red.length    = info->var.bits_per_pixel;
			info->var.red.msb_right = 0;

			info->var.green.offset  = 0;
			info->var.green.length  = info->var.bits_per_pixel;
			info->var.green.msb_right = 0;

			info->var.blue.offset   = 0;
			info->var.blue.length   = info->var.bits_per_pixel;
			info->var.blue.msb_right = 0;

			info->var.transp.offset = 0;
			info->var.transp.length = 0;
			info->var.transp.msb_right = 0;

			info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
			info->fix.line_length = info->var.xres_virtual /
							(8/info->var.bits_per_pixel);
		} else {
			/* non-palettized */
			index = (fbdev->panel->control_base & LCD_CONTROL_SBPPF_MASK) >> LCD_CONTROL_SBPPF_BIT;
			info->var.red = rgb_bitfields[index][0];
			info->var.green = rgb_bitfields[index][1];
			info->var.blue = rgb_bitfields[index][2];
			info->var.transp = rgb_bitfields[index][3];

			info->fix.visual = FB_VISUAL_TRUECOLOR;
			info->fix.line_length = info->var.xres_virtual << 1; /* depth=16 */
		}
	} else {
		/* mono */
		info->fix.visual = FB_VISUAL_MONO10;
		info->fix.line_length = info->var.xres_virtual / 8;
	}

	info->screen_size = info->fix.line_length * info->var.yres_virtual;
	info->var.rotate = ((fbdev->panel->control_base&LCD_CONTROL_SM_MASK) \
				>> LCD_CONTROL_SM_BIT) * 90;

	/* Determine BPP mode and format */
	fbdev->regs->lcd_control = fbdev->panel->control_base;
	fbdev->regs->lcd_horztiming = fbdev->panel->horztiming;
	fbdev->regs->lcd_verttiming = fbdev->panel->verttiming;
	fbdev->regs->lcd_clkcontrol = fbdev->panel->clkcontrol_base;
	fbdev->regs->lcd_intenable = 0;
	fbdev->regs->lcd_intstatus = 0;
	fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(fbdev->fb_phys);

	if (panel_is_dual(fbdev->panel)) {
		/* Second panel display seconf half of screen if possible,
		 * otherwise display the same as the first panel */
		if (info->var.yres_virtual >= (info->var.yres << 1)) {
			fbdev->regs->lcd_dmaaddr1 = LCD_DMA_SA_N(fbdev->fb_phys +
							  (info->fix.line_length *
						          (info->var.yres_virtual >> 1)));
		} else {
			fbdev->regs->lcd_dmaaddr1 = LCD_DMA_SA_N(fbdev->fb_phys);
		}
	}

	words = info->fix.line_length / sizeof(u32);
	if (!info->var.rotate || (info->var.rotate == 180)) {
		words *= info->var.yres_virtual;
		if (info->var.rotate /* 180 */) {
			words -= (words % 8); /* should be divisable by 8 */
		}
	}
	fbdev->regs->lcd_words = LCD_WRD_WRDS_N(words);

	fbdev->regs->lcd_pwmdiv = 0;
	fbdev->regs->lcd_pwmhi = 0;

	/* Resume controller */
	fbdev->regs->lcd_control |= LCD_CONTROL_GO;
	mdelay(10);
	au1100fb_fb_blank(VESA_NO_BLANKING, info);

	return 0;
}

/* fb_setcolreg
 * Set color in LCD palette.
 */
int au1100fb_fb_setcolreg(unsigned regno, unsigned red, unsigned green, unsigned blue, unsigned transp, struct fb_info *fbi)
{
	struct au1100fb_device *fbdev;
	u32 *palette;
	u32 value;

	fbdev = to_au1100fb_device(fbi);
	palette = fbdev->regs->lcd_palettebase;

	if (regno > (AU1100_LCD_NBR_PALETTE_ENTRIES - 1))
		return -EINVAL;

	if (fbi->var.grayscale) {
		/* Convert color to grayscale */
		red = green = blue =
			(19595 * red + 38470 * green + 7471 * blue) >> 16;
	}

	if (fbi->fix.visual == FB_VISUAL_TRUECOLOR) {
		/* Place color in the pseudopalette */
		if (regno > 16)
			return -EINVAL;

		palette = (u32*)fbi->pseudo_palette;

		red   >>= (16 - fbi->var.red.length);
		green >>= (16 - fbi->var.green.length);
		blue  >>= (16 - fbi->var.blue.length);

		value = (red   << fbi->var.red.offset) 	|
			(green << fbi->var.green.offset)|
			(blue  << fbi->var.blue.offset);
		value &= 0xFFFF;

	} else if (panel_is_active(fbdev->panel)) {
		/* COLOR TFT PALLETTIZED (use RGB 565) */
		value = (red & 0xF800)|((green >> 5) & 0x07E0)|((blue >> 11) & 0x001F);
		value &= 0xFFFF;

	} else if (panel_is_color(fbdev->panel)) {
		/* COLOR STN MODE */
		value = (((panel_swap_rgb(fbdev->panel) ? blue : red) >> 12) & 0x000F) |
			((green >> 8) & 0x00F0) |
			(((panel_swap_rgb(fbdev->panel) ? red : blue) >> 4) & 0x0F00);
		value &= 0xFFF;
	} else {
		/* MONOCHROME MODE */
		value = (green >> 12) & 0x000F;
		value &= 0xF;
	}

	palette[regno] = value;

	return 0;
}

/* fb_pan_display
 * Pan display in x and/or y as specified
 */
int au1100fb_fb_pan_display(struct fb_var_screeninfo *var, struct fb_info *fbi)
{
	struct au1100fb_device *fbdev;
	int dy;

	fbdev = to_au1100fb_device(fbi);

	print_dbg("fb_pan_display %p %p", var, fbi);

	if (!var || !fbdev) {
		return -EINVAL;
	}

	if (var->xoffset - fbi->var.xoffset) {
		/* No support for X panning for now! */
		return -EINVAL;
	}

	print_dbg("fb_pan_display 2 %p %p", var, fbi);
	dy = var->yoffset - fbi->var.yoffset;
	if (dy) {

		u32 dmaaddr;

		print_dbg("Panning screen of %d lines", dy);

		dmaaddr = fbdev->regs->lcd_dmaaddr0;
		dmaaddr += (fbi->fix.line_length * dy);

		/* TODO: Wait for current frame to finished */
		fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(dmaaddr);

		if (panel_is_dual(fbdev->panel)) {
			dmaaddr = fbdev->regs->lcd_dmaaddr1;
			dmaaddr += (fbi->fix.line_length * dy);
			fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(dmaaddr);
	}
	}
	print_dbg("fb_pan_display 3 %p %p", var, fbi);

	return 0;
}

/* fb_mmap
 * Map video memory in user space. We don't use the generic fb_mmap method mainly
 * to allow the use of the TLB streaming flag (CCA=6)
 */
int au1100fb_fb_mmap(struct fb_info *fbi, struct vm_area_struct *vma)
{
	struct au1100fb_device *fbdev = to_au1100fb_device(fbi);

	pgprot_val(vma->vm_page_prot) |= (6 << 9); //CCA=6

	return dma_mmap_coherent(fbdev->dev, vma, fbdev->fb_mem, fbdev->fb_phys,
			fbdev->fb_len);
}

static const struct fb_ops au1100fb_ops =
{
	.owner			= THIS_MODULE,
	.fb_setcolreg		= au1100fb_fb_setcolreg,
	.fb_blank		= au1100fb_fb_blank,
	.fb_pan_display		= au1100fb_fb_pan_display,
	.fb_fillrect		= cfb_fillrect,
	.fb_copyarea		= cfb_copyarea,
	.fb_imageblit		= cfb_imageblit,
	.fb_mmap		= au1100fb_fb_mmap,
};


/*-------------------------------------------------------------------------*/

static int au1100fb_setup(struct au1100fb_device *fbdev)
{
	char *this_opt, *options;
	int num_panels = ARRAY_SIZE(known_lcd_panels);

	if (num_panels <= 0) {
		print_err("No LCD panels supported by driver!");
		return -ENODEV;
	}

	if (fb_get_options(DRIVER_NAME, &options))
		return -ENODEV;
	if (!options)
		return -ENODEV;

	while ((this_opt = strsep(&options, ",")) != NULL) {
		/* Panel option */
		if (!strncmp(this_opt, "panel:", 6)) {
			int i;
			this_opt += 6;
			for (i = 0; i < num_panels; i++) {
				if (!strncmp(this_opt, known_lcd_panels[i].name,
					     strlen(this_opt))) {
					fbdev->panel = &known_lcd_panels[i];
					fbdev->panel_idx = i;
					break;
				}
			}
			if (i >= num_panels) {
				print_warn("Panel '%s' not supported!", this_opt);
				return -ENODEV;
			}
		}
		/* Unsupported option */
		else
			print_warn("Unsupported option \"%s\"", this_opt);
	}

	print_info("Panel=%s", fbdev->panel->name);

	return 0;
}

static int au1100fb_drv_probe(struct platform_device *dev)
{
	struct au1100fb_device *fbdev;
	struct resource *regs_res;
	struct clk *c;

	/* Allocate new device private */
	fbdev = devm_kzalloc(&dev->dev, sizeof(*fbdev), GFP_KERNEL);
	if (!fbdev)
		return -ENOMEM;

	if (au1100fb_setup(fbdev))
		goto failed;

	platform_set_drvdata(dev, (void *)fbdev);
	fbdev->dev = &dev->dev;

	/* Allocate region for our registers and map them */
	regs_res = platform_get_resource(dev, IORESOURCE_MEM, 0);
	if (!regs_res) {
		print_err("fail to retrieve registers resource");
		return -EFAULT;
	}

	au1100fb_fix.mmio_start = regs_res->start;
	au1100fb_fix.mmio_len = resource_size(regs_res);

	if (!devm_request_mem_region(&dev->dev,
				     au1100fb_fix.mmio_start,
				     au1100fb_fix.mmio_len,
				     DRIVER_NAME)) {
		print_err("fail to lock memory region at 0x%08lx",
				au1100fb_fix.mmio_start);
		return -EBUSY;
	}

	fbdev->regs = (struct au1100fb_regs*)KSEG1ADDR(au1100fb_fix.mmio_start);

	print_dbg("Register memory map at %p", fbdev->regs);
	print_dbg("phys=0x%08x, size=%d", fbdev->regs_phys, fbdev->regs_len);

	c = clk_get(NULL, "lcd_intclk");
	if (!IS_ERR(c)) {
		fbdev->lcdclk = c;
		clk_set_rate(c, 48000000);
		clk_prepare_enable(c);
	}

	/* Allocate the framebuffer to the maximum screen size * nbr of video buffers */
	fbdev->fb_len = fbdev->panel->xres * fbdev->panel->yres *
		  	(fbdev->panel->bpp >> 3) * AU1100FB_NBR_VIDEO_BUFFERS;

	fbdev->fb_mem = dmam_alloc_coherent(&dev->dev,
					    PAGE_ALIGN(fbdev->fb_len),
					    &fbdev->fb_phys, GFP_KERNEL);
	if (!fbdev->fb_mem) {
		print_err("fail to allocate framebuffer (size: %dK))",
			  fbdev->fb_len / 1024);
		return -ENOMEM;
	}

	au1100fb_fix.smem_start = fbdev->fb_phys;
	au1100fb_fix.smem_len = fbdev->fb_len;

	print_dbg("Framebuffer memory map at %p", fbdev->fb_mem);
	print_dbg("phys=0x%08x, size=%dK", fbdev->fb_phys, fbdev->fb_len / 1024);

	/* load the panel info into the var struct */
	au1100fb_var.bits_per_pixel = fbdev->panel->bpp;
	au1100fb_var.xres = fbdev->panel->xres;
	au1100fb_var.xres_virtual = au1100fb_var.xres;
	au1100fb_var.yres = fbdev->panel->yres;
	au1100fb_var.yres_virtual = au1100fb_var.yres;

	fbdev->info.screen_base = fbdev->fb_mem;
	fbdev->info.fbops = &au1100fb_ops;
	fbdev->info.fix = au1100fb_fix;

	fbdev->info.pseudo_palette =
		devm_kcalloc(&dev->dev, 16, sizeof(u32), GFP_KERNEL);
	if (!fbdev->info.pseudo_palette)
		return -ENOMEM;

	if (fb_alloc_cmap(&fbdev->info.cmap, AU1100_LCD_NBR_PALETTE_ENTRIES, 0) < 0) {
		print_err("Fail to allocate colormap (%d entries)",
			   AU1100_LCD_NBR_PALETTE_ENTRIES);
		return -EFAULT;
	}

	fbdev->info.var = au1100fb_var;

	/* Set h/w registers */
	au1100fb_setmode(fbdev);

	/* Register new framebuffer */
	if (register_framebuffer(&fbdev->info) < 0) {
		print_err("cannot register new framebuffer");
		goto failed;
	}

	return 0;

failed:
	if (fbdev->lcdclk) {
		clk_disable_unprepare(fbdev->lcdclk);
		clk_put(fbdev->lcdclk);
	}
	if (fbdev->info.cmap.len != 0) {
		fb_dealloc_cmap(&fbdev->info.cmap);
	}

	return -ENODEV;
}

int au1100fb_drv_remove(struct platform_device *dev)
{
	struct au1100fb_device *fbdev = NULL;

	if (!dev)
		return -ENODEV;

	fbdev = platform_get_drvdata(dev);

#if !defined(CONFIG_FRAMEBUFFER_CONSOLE) && defined(CONFIG_LOGO)
	au1100fb_fb_blank(VESA_POWERDOWN, &fbdev->info);
#endif
	fbdev->regs->lcd_control &= ~LCD_CONTROL_GO;

	/* Clean up all probe data */
	unregister_framebuffer(&fbdev->info);

	fb_dealloc_cmap(&fbdev->info.cmap);

	if (fbdev->lcdclk) {
		clk_disable_unprepare(fbdev->lcdclk);
		clk_put(fbdev->lcdclk);
	}

	return 0;
}

#ifdef CONFIG_PM
static struct au1100fb_regs fbregs;

int au1100fb_drv_suspend(struct platform_device *dev, pm_message_t state)
{
	struct au1100fb_device *fbdev = platform_get_drvdata(dev);

	if (!fbdev)
		return 0;

	/* Blank the LCD */
	au1100fb_fb_blank(VESA_POWERDOWN, &fbdev->info);

	clk_disable(fbdev->lcdclk);

	memcpy(&fbregs, fbdev->regs, sizeof(struct au1100fb_regs));

	return 0;
}

int au1100fb_drv_resume(struct platform_device *dev)
{
	struct au1100fb_device *fbdev = platform_get_drvdata(dev);

	if (!fbdev)
		return 0;

	memcpy(fbdev->regs, &fbregs, sizeof(struct au1100fb_regs));

	clk_enable(fbdev->lcdclk);

	/* Unblank the LCD */
	au1100fb_fb_blank(VESA_NO_BLANKING, &fbdev->info);

	return 0;
}
#else
#define au1100fb_drv_suspend NULL
#define au1100fb_drv_resume NULL
#endif

static struct platform_driver au1100fb_driver = {
	.driver = {
		.name		= "au1100-lcd",
	},
	.probe		= au1100fb_drv_probe,
        .remove		= au1100fb_drv_remove,
	.suspend	= au1100fb_drv_suspend,
        .resume		= au1100fb_drv_resume,
};
module_platform_driver(au1100fb_driver);

MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");
Commit	Line	Data
1da177e4 LT	1	/*
	2	* BRIEF MODULE DESCRIPTION
	3	* Au1100 LCD Driver.
	4	*
3b495f2b PP	5	* Rewritten for 2.6 by Embedded Alley Solutions
	6	* <source@embeddedalley.com>, based on submissions by
	7	* Karl Lessard <klessard@sunrisetelecom.com>
	8	* <c.pellegrin@exadron.com>
	9	*
f77f50ca	10	* PM support added by Rodolfo Giometti <giometti@linux.it>
ca27ac4c	11	* Cursor enable/disable by Rodolfo Giometti <giometti@linux.it>
f77f50ca	12	*
1da177e4 LT	13	* Copyright 2002 MontaVista Software
	14	* Author: MontaVista Software, Inc.
	15	* ppopov@mvista.com or source@mvista.com
	16	*
	17	* Copyright 2002 Alchemy Semiconductor
	18	* Author: Alchemy Semiconductor
	19	*
	20	* Based on:
	21	* linux/drivers/video/skeletonfb.c -- Skeleton for a frame buffer device
	22	* Created 28 Dec 1997 by Geert Uytterhoeven
	23	*
	24	* This program is free software; you can redistribute it and/or modify it
	25	* under the terms of the GNU General Public License as published by the
	26	* Free Software Foundation; either version 2 of the License, or (at your
	27	* option) any later version.
	28	*
	29	* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
	30	* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
	31	* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
	32	* NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
	33	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
	34	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
	35	* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
	36	* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	37	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
	38	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	39	*
	40	* You should have received a copy of the GNU General Public License along
	41	* with this program; if not, write to the Free Software Foundation, Inc.,
	42	* 675 Mass Ave, Cambridge, MA 02139, USA.
	43	*/
6b1889c1	44	#include <linux/clk.h>
1da177e4 LT	45	#include <linux/module.h>
	46	#include <linux/kernel.h>
	47	#include <linux/errno.h>
	48	#include <linux/string.h>
	49	#include <linux/mm.h>
1da177e4 LT	50	#include <linux/fb.h>
1da177e4 LT	51	#include <linux/init.h>
3b495f2b PP	52	#include <linux/interrupt.h>
	53	#include <linux/ctype.h>
	54	#include <linux/dma-mapping.h>
cacfc8cf	55	#include <linux/platform_device.h>
5a0e3ad6	56	#include <linux/slab.h>
1da177e4	57
3b495f2b	58	#include <asm/mach-au1x00/au1000.h>
1da177e4	59
3b495f2b PP	60	#define DEBUG 0
	61
	62	#include "au1100fb.h"
1da177e4	63
3b495f2b PP	64	#define DRIVER_NAME "au1100fb"
3b495f2b PP	65	#define DRIVER_DESC "LCD controller driver for AU1100 processors"
1da177e4	66
3b495f2b PP	67	#define to_au1100fb_device(_info) \
3b495f2b PP	68	(_info ? container_of(_info, struct au1100fb_device, info) : NULL);
1da177e4	69
3b495f2b PP	70	/* Bitfields format supported by the controller. Note that the order of formats
	71	* SHOULD be the same as in the LCD_CONTROL_SBPPF field, so we can retrieve the
	72	* right pixel format by doing rgb_bitfields[LCD_CONTROL_SBPPF_XXX >> LCD_CONTROL_SBPPF]
	73	*/
	74	struct fb_bitfield rgb_bitfields[][4] =
	75	{
	76	/* Red, Green, Blue, Transp */
	77	{ { 10, 6, 0 }, { 5, 5, 0 }, { 0, 5, 0 }, { 0, 0, 0 } },
	78	{ { 11, 5, 0 }, { 5, 6, 0 }, { 0, 5, 0 }, { 0, 0, 0 } },
	79	{ { 11, 5, 0 }, { 6, 5, 0 }, { 0, 6, 0 }, { 0, 0, 0 } },
	80	{ { 10, 5, 0 }, { 5, 5, 0 }, { 0, 5, 0 }, { 15, 1, 0 } },
	81	{ { 11, 5, 0 }, { 6, 5, 0 }, { 1, 5, 0 }, { 0, 1, 0 } },
	82
	83	/* The last is used to describe 12bpp format */
	84	{ { 8, 4, 0 }, { 4, 4, 0 }, { 0, 4, 0 }, { 0, 0, 0 } },
1da177e4 LT	85	};
1da177e4 LT	86
48c68c4f	87	static struct fb_fix_screeninfo au1100fb_fix = {
3b495f2b PP	88	.id = "AU1100 FB",
	89	.xpanstep = 1,
	90	.ypanstep = 1,
	91	.type = FB_TYPE_PACKED_PIXELS,
	92	.accel = FB_ACCEL_NONE,
1da177e4 LT	93	};
1da177e4 LT	94
48c68c4f	95	static struct fb_var_screeninfo au1100fb_var = {
3b495f2b PP	96	.activate = FB_ACTIVATE_NOW,
	97	.height = -1,
	98	.width = -1,
	99	.vmode = FB_VMODE_NONINTERLACED,
1da177e4 LT	100	};
1da177e4 LT	101
8e92f21b YY	102	/* fb_blank
	103	* Blank the screen. Depending on the mode, the screen will be
	104	* activated with the backlight color, or desactivated
	105	*/
	106	static int au1100fb_fb_blank(int blank_mode, struct fb_info *fbi)
	107	{
	108	struct au1100fb_device *fbdev = to_au1100fb_device(fbi);
	109
	110	print_dbg("fb_blank %d %p", blank_mode, fbi);
	111
	112	switch (blank_mode) {
	113
	114	case VESA_NO_BLANKING:
88564dda PB	115	/* Turn on panel */
88564dda PB	116	fbdev->regs->lcd_control \|= LCD_CONTROL_GO;
2f73bfbe	117	wmb(); /* drain writebuffer */
8e92f21b YY	118	break;
	119
	120	case VESA_VSYNC_SUSPEND:
	121	case VESA_HSYNC_SUSPEND:
	122	case VESA_POWERDOWN:
88564dda PB	123	/* Turn off panel */
88564dda PB	124	fbdev->regs->lcd_control &= ~LCD_CONTROL_GO;
2f73bfbe	125	wmb(); /* drain writebuffer */
8e92f21b YY	126	break;
	127	default:
	128	break;
	129
	130	}
	131	return 0;
	132	}
	133
3b495f2b PP	134	/*
	135	* Set hardware with var settings. This will enable the controller with a specific
	136	* mode, normally validated with the fb_check_var method
1da177e4	137	*/
3b495f2b	138	int au1100fb_setmode(struct au1100fb_device *fbdev)
1da177e4	139	{
3b495f2b PP	140	struct fb_info *info = &fbdev->info;
	141	u32 words;
	142	int index;
1da177e4	143
3b495f2b PP	144	if (!fbdev)
	145	return -EINVAL;
	146
	147	/* Update var-dependent FB info */
	148	if (panel_is_active(fbdev->panel) \|\| panel_is_color(fbdev->panel)) {
	149	if (info->var.bits_per_pixel <= 8) {
	150	/* palettized */
	151	info->var.red.offset = 0;
	152	info->var.red.length = info->var.bits_per_pixel;
	153	info->var.red.msb_right = 0;
	154
	155	info->var.green.offset = 0;
	156	info->var.green.length = info->var.bits_per_pixel;
	157	info->var.green.msb_right = 0;
	158
	159	info->var.blue.offset = 0;
	160	info->var.blue.length = info->var.bits_per_pixel;
	161	info->var.blue.msb_right = 0;
	162
	163	info->var.transp.offset = 0;
	164	info->var.transp.length = 0;
	165	info->var.transp.msb_right = 0;
	166
	167	info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
	168	info->fix.line_length = info->var.xres_virtual /
	169	(8/info->var.bits_per_pixel);
	170	} else {
	171	/* non-palettized */
	172	index = (fbdev->panel->control_base & LCD_CONTROL_SBPPF_MASK) >> LCD_CONTROL_SBPPF_BIT;
	173	info->var.red = rgb_bitfields[index][0];
	174	info->var.green = rgb_bitfields[index][1];
	175	info->var.blue = rgb_bitfields[index][2];
	176	info->var.transp = rgb_bitfields[index][3];
	177
	178	info->fix.visual = FB_VISUAL_TRUECOLOR;
	179	info->fix.line_length = info->var.xres_virtual << 1; /* depth=16 */
bb39e419	180	}
3b495f2b PP	181	} else {
	182	/* mono */
	183	info->fix.visual = FB_VISUAL_MONO10;
	184	info->fix.line_length = info->var.xres_virtual / 8;
1da177e4 LT	185	}
1da177e4 LT	186
3b495f2b	187	info->screen_size = info->fix.line_length * info->var.yres_virtual;
fd2d5430 RG	188	info->var.rotate = ((fbdev->panel->control_base&LCD_CONTROL_SM_MASK) \
fd2d5430 RG	189	>> LCD_CONTROL_SM_BIT) * 90;
1da177e4	190
3b495f2b	191	/* Determine BPP mode and format */
fd2d5430	192	fbdev->regs->lcd_control = fbdev->panel->control_base;
3b495f2b	193	fbdev->regs->lcd_horztiming = fbdev->panel->horztiming;
3b495f2b	194	fbdev->regs->lcd_verttiming = fbdev->panel->verttiming;
3b495f2b	195	fbdev->regs->lcd_clkcontrol = fbdev->panel->clkcontrol_base;
bb39e419 RG	196	fbdev->regs->lcd_intenable = 0;
bb39e419 RG	197	fbdev->regs->lcd_intstatus = 0;
3b495f2b PP	198	fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(fbdev->fb_phys);
	199
	200	if (panel_is_dual(fbdev->panel)) {
	201	/* Second panel display seconf half of screen if possible,
	202	* otherwise display the same as the first panel */
	203	if (info->var.yres_virtual >= (info->var.yres << 1)) {
	204	fbdev->regs->lcd_dmaaddr1 = LCD_DMA_SA_N(fbdev->fb_phys +
	205	(info->fix.line_length *
	206	(info->var.yres_virtual >> 1)));
	207	} else {
	208	fbdev->regs->lcd_dmaaddr1 = LCD_DMA_SA_N(fbdev->fb_phys);
	209	}
1da177e4	210	}
1da177e4	211
3b495f2b PP	212	words = info->fix.line_length / sizeof(u32);
	213	if (!info->var.rotate \|\| (info->var.rotate == 180)) {
	214	words *= info->var.yres_virtual;
	215	if (info->var.rotate /* 180 */) {
	216	words -= (words % 8); /* should be divisable by 8 */
	217	}
	218	}
	219	fbdev->regs->lcd_words = LCD_WRD_WRDS_N(words);
1da177e4	220
3b495f2b PP	221	fbdev->regs->lcd_pwmdiv = 0;
3b495f2b PP	222	fbdev->regs->lcd_pwmhi = 0;
1da177e4	223
3b495f2b PP	224	/* Resume controller */
3b495f2b PP	225	fbdev->regs->lcd_control \|= LCD_CONTROL_GO;
bb39e419 RG	226	mdelay(10);
bb39e419 RG	227	au1100fb_fb_blank(VESA_NO_BLANKING, info);
1da177e4	228
3b495f2b	229	return 0;
1da177e4 LT	230	}
1da177e4 LT	231
3b495f2b PP	232	/* fb_setcolreg
	233	* Set color in LCD palette.
	234	*/
	235	int au1100fb_fb_setcolreg(unsigned regno, unsigned red, unsigned green, unsigned blue, unsigned transp, struct fb_info *fbi)
1da177e4	236	{
c05b7f3d RG	237	struct au1100fb_device *fbdev;
c05b7f3d RG	238	u32 *palette;
3b495f2b	239	u32 value;
1da177e4	240
c05b7f3d	241	fbdev = to_au1100fb_device(fbi);
0714ea33	242	palette = fbdev->regs->lcd_palettebase;
c05b7f3d	243
3b495f2b PP	244	if (regno > (AU1100_LCD_NBR_PALETTE_ENTRIES - 1))
3b495f2b PP	245	return -EINVAL;
1da177e4	246
3b495f2b PP	247	if (fbi->var.grayscale) {
	248	/* Convert color to grayscale */
	249	red = green = blue =
	250	(19595 * red + 38470 * green + 7471 * blue) >> 16;
	251	}
1da177e4	252
3b495f2b PP	253	if (fbi->fix.visual == FB_VISUAL_TRUECOLOR) {
	254	/* Place color in the pseudopalette */
	255	if (regno > 16)
	256	return -EINVAL;
1da177e4	257
3b495f2b PP	258	palette = (u32*)fbi->pseudo_palette;
	259
	260	red >>= (16 - fbi->var.red.length);
	261	green >>= (16 - fbi->var.green.length);
	262	blue >>= (16 - fbi->var.blue.length);
	263
	264	value = (red << fbi->var.red.offset) \|
	265	(green << fbi->var.green.offset)\|
	266	(blue << fbi->var.blue.offset);
	267	value &= 0xFFFF;
	268
	269	} else if (panel_is_active(fbdev->panel)) {
	270	/* COLOR TFT PALLETTIZED (use RGB 565) */
	271	value = (red & 0xF800)\|((green >> 5) & 0x07E0)\|((blue >> 11) & 0x001F);
	272	value &= 0xFFFF;
	273
	274	} else if (panel_is_color(fbdev->panel)) {
	275	/* COLOR STN MODE */
	276	value = (((panel_swap_rgb(fbdev->panel) ? blue : red) >> 12) & 0x000F) \|
	277	((green >> 8) & 0x00F0) \|
	278	(((panel_swap_rgb(fbdev->panel) ? red : blue) >> 4) & 0x0F00);
	279	value &= 0xFFF;
	280	} else {
	281	/* MONOCHROME MODE */
	282	value = (green >> 12) & 0x000F;
	283	value &= 0xF;
1da177e4 LT	284	}
1da177e4 LT	285
3b495f2b PP	286	palette[regno] = value;
3b495f2b PP	287
1da177e4 LT	288	return 0;
	289	}
	290
3b495f2b PP	291	/* fb_pan_display
	292	* Pan display in x and/or y as specified
	293	*/
	294	int au1100fb_fb_pan_display(struct fb_var_screeninfo var, struct fb_info fbi)
1da177e4	295	{
c05b7f3d	296	struct au1100fb_device *fbdev;
3b495f2b PP	297	int dy;
3b495f2b PP	298
c05b7f3d RG	299	fbdev = to_au1100fb_device(fbi);
c05b7f3d RG	300
3b495f2b PP	301	print_dbg("fb_pan_display %p %p", var, fbi);
	302
	303	if (!var \|\| !fbdev) {
	304	return -EINVAL;
	305	}
	306
	307	if (var->xoffset - fbi->var.xoffset) {
	308	/* No support for X panning for now! */
	309	return -EINVAL;
	310	}
	311
	312	print_dbg("fb_pan_display 2 %p %p", var, fbi);
	313	dy = var->yoffset - fbi->var.yoffset;
	314	if (dy) {
	315
	316	u32 dmaaddr;
	317
	318	print_dbg("Panning screen of %d lines", dy);
	319
	320	dmaaddr = fbdev->regs->lcd_dmaaddr0;
	321	dmaaddr += (fbi->fix.line_length * dy);
	322
	323	/* TODO: Wait for current frame to finished */
	324	fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(dmaaddr);
	325
	326	if (panel_is_dual(fbdev->panel)) {
	327	dmaaddr = fbdev->regs->lcd_dmaaddr1;
	328	dmaaddr += (fbi->fix.line_length * dy);
	329	fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(dmaaddr);
	330	}
	331	}
	332	print_dbg("fb_pan_display 3 %p %p", var, fbi);
	333
	334	return 0;
	335	}
	336
3b495f2b PP	337	/* fb_mmap
	338	* Map video memory in user space. We don't use the generic fb_mmap method mainly
	339	* to allow the use of the TLB streaming flag (CCA=6)
	340	*/
216d526c	341	int au1100fb_fb_mmap(struct fb_info fbi, struct vm_area_struct vma)
1da177e4	342	{
67f30ad1	343	struct au1100fb_device *fbdev = to_au1100fb_device(fbi);
c05b7f3d	344
1da177e4 LT	345	pgprot_val(vma->vm_page_prot) \|= (6 << 9); //CCA=6
1da177e4 LT	346
67f30ad1 CH	347	return dma_mmap_coherent(fbdev->dev, vma, fbdev->fb_mem, fbdev->fb_phys,
67f30ad1 CH	348	fbdev->fb_len);
1da177e4 LT	349	}
1da177e4 LT	350
8a48ac33	351	static const struct fb_ops au1100fb_ops =
1da177e4	352	{
3b495f2b PP	353	.owner = THIS_MODULE,
	354	.fb_setcolreg = au1100fb_fb_setcolreg,
	355	.fb_blank = au1100fb_fb_blank,
	356	.fb_pan_display = au1100fb_fb_pan_display,
	357	.fb_fillrect = cfb_fillrect,
	358	.fb_copyarea = cfb_copyarea,
	359	.fb_imageblit = cfb_imageblit,
3b495f2b PP	360	.fb_mmap = au1100fb_fb_mmap,
3b495f2b PP	361	};
1da177e4	362
1da177e4	363
3b495f2b	364	/-------------------------------------------------------------------------/
1da177e4	365
d121c3f3 ML	366	static int au1100fb_setup(struct au1100fb_device *fbdev)
	367	{
	368	char this_opt, options;
	369	int num_panels = ARRAY_SIZE(known_lcd_panels);
	370
	371	if (num_panels <= 0) {
	372	print_err("No LCD panels supported by driver!");
	373	return -ENODEV;
	374	}
	375
	376	if (fb_get_options(DRIVER_NAME, &options))
	377	return -ENODEV;
	378	if (!options)
	379	return -ENODEV;
	380
	381	while ((this_opt = strsep(&options, ",")) != NULL) {
	382	/* Panel option */
	383	if (!strncmp(this_opt, "panel:", 6)) {
	384	int i;
	385	this_opt += 6;
	386	for (i = 0; i < num_panels; i++) {
	387	if (!strncmp(this_opt, known_lcd_panels[i].name,
	388	strlen(this_opt))) {
	389	fbdev->panel = &known_lcd_panels[i];
	390	fbdev->panel_idx = i;
	391	break;
	392	}
	393	}
	394	if (i >= num_panels) {
	395	print_warn("Panel '%s' not supported!", this_opt);
	396	return -ENODEV;
	397	}
	398	}
	399	/* Unsupported option */
	400	else
	401	print_warn("Unsupported option \"%s\"", this_opt);
	402	}
	403
	404	print_info("Panel=%s", fbdev->panel->name);
	405
	406	return 0;
	407	}
1da177e4	408
48c68c4f	409	static int au1100fb_drv_probe(struct platform_device *dev)
1da177e4	410	{
46953e6a	411	struct au1100fb_device *fbdev;
3b495f2b	412	struct resource *regs_res;
6b1889c1	413	struct clk *c;
3b495f2b	414
3b495f2b	415	/* Allocate new device private */
db66f025	416	fbdev = devm_kzalloc(&dev->dev, sizeof(*fbdev), GFP_KERNEL);
29914bad	417	if (!fbdev)
3b495f2b	418	return -ENOMEM;
1da177e4	419
d121c3f3 ML	420	if (au1100fb_setup(fbdev))
d121c3f3 ML	421	goto failed;
1da177e4	422
7a192ec3	423	platform_set_drvdata(dev, (void *)fbdev);
67f30ad1	424	fbdev->dev = &dev->dev;
1da177e4	425
3b495f2b	426	/* Allocate region for our registers and map them */
d121c3f3 ML	427	regs_res = platform_get_resource(dev, IORESOURCE_MEM, 0);
d121c3f3 ML	428	if (!regs_res) {
3b495f2b PP	429	print_err("fail to retrieve registers resource");
	430	return -EFAULT;
	431	}
1da177e4	432
3b495f2b	433	au1100fb_fix.mmio_start = regs_res->start;
28f65c11	434	au1100fb_fix.mmio_len = resource_size(regs_res);
1da177e4	435
93019734 ML	436	if (!devm_request_mem_region(&dev->dev,
93019734 ML	437	au1100fb_fix.mmio_start,
1c16697b JL	438	au1100fb_fix.mmio_len,
1c16697b JL	439	DRIVER_NAME)) {
c05b7f3d	440	print_err("fail to lock memory region at 0x%08lx",
3b495f2b PP	441	au1100fb_fix.mmio_start);
	442	return -EBUSY;
	443	}
1da177e4	444
3b495f2b	445	fbdev->regs = (struct au1100fb_regs*)KSEG1ADDR(au1100fb_fix.mmio_start);
1da177e4	446
3b495f2b PP	447	print_dbg("Register memory map at %p", fbdev->regs);
3b495f2b PP	448	print_dbg("phys=0x%08x, size=%d", fbdev->regs_phys, fbdev->regs_len);
1da177e4	449
6b1889c1 ML	450	c = clk_get(NULL, "lcd_intclk");
	451	if (!IS_ERR(c)) {
	452	fbdev->lcdclk = c;
	453	clk_set_rate(c, 48000000);
	454	clk_prepare_enable(c);
	455	}
	456
3b495f2b PP	457	/* Allocate the framebuffer to the maximum screen size * nbr of video buffers */
	458	fbdev->fb_len = fbdev->panel->xres * fbdev->panel->yres *
	459	(fbdev->panel->bpp >> 3) * AU1100FB_NBR_VIDEO_BUFFERS;
	460
93019734	461	fbdev->fb_mem = dmam_alloc_coherent(&dev->dev,
1c16697b JL	462	PAGE_ALIGN(fbdev->fb_len),
1c16697b JL	463	&fbdev->fb_phys, GFP_KERNEL);
3b495f2b	464	if (!fbdev->fb_mem) {
3879490f	465	print_err("fail to allocate framebuffer (size: %dK))",
3b495f2b	466	fbdev->fb_len / 1024);
1da177e4 LT	467	return -ENOMEM;
1da177e4 LT	468	}
3b495f2b PP	469
	470	au1100fb_fix.smem_start = fbdev->fb_phys;
	471	au1100fb_fix.smem_len = fbdev->fb_len;
1da177e4	472
3b495f2b PP	473	print_dbg("Framebuffer memory map at %p", fbdev->fb_mem);
	474	print_dbg("phys=0x%08x, size=%dK", fbdev->fb_phys, fbdev->fb_len / 1024);
	475
3b495f2b PP	476	/* load the panel info into the var struct */
	477	au1100fb_var.bits_per_pixel = fbdev->panel->bpp;
	478	au1100fb_var.xres = fbdev->panel->xres;
	479	au1100fb_var.xres_virtual = au1100fb_var.xres;
	480	au1100fb_var.yres = fbdev->panel->yres;
	481	au1100fb_var.yres_virtual = au1100fb_var.yres;
	482
	483	fbdev->info.screen_base = fbdev->fb_mem;
	484	fbdev->info.fbops = &au1100fb_ops;
	485	fbdev->info.fix = au1100fb_fix;
	486
1c16697b	487	fbdev->info.pseudo_palette =
a86854d0	488	devm_kcalloc(&dev->dev, 16, sizeof(u32), GFP_KERNEL);
1c16697b	489	if (!fbdev->info.pseudo_palette)
3b495f2b	490	return -ENOMEM;
3b495f2b PP	491
	492	if (fb_alloc_cmap(&fbdev->info.cmap, AU1100_LCD_NBR_PALETTE_ENTRIES, 0) < 0) {
	493	print_err("Fail to allocate colormap (%d entries)",
	494	AU1100_LCD_NBR_PALETTE_ENTRIES);
3b495f2b PP	495	return -EFAULT;
	496	}
	497
	498	fbdev->info.var = au1100fb_var;
	499
	500	/* Set h/w registers */
	501	au1100fb_setmode(fbdev);
	502
	503	/* Register new framebuffer */
	504	if (register_framebuffer(&fbdev->info) < 0) {
	505	print_err("cannot register new framebuffer");
	506	goto failed;
	507	}
	508
	509	return 0;
	510
	511	failed:
6b1889c1 ML	512	if (fbdev->lcdclk) {
	513	clk_disable_unprepare(fbdev->lcdclk);
	514	clk_put(fbdev->lcdclk);
	515	}
3b495f2b PP	516	if (fbdev->info.cmap.len != 0) {
	517	fb_dealloc_cmap(&fbdev->info.cmap);
	518	}
1da177e4	519
1c16697b	520	return -ENODEV;
1da177e4 LT	521	}
1da177e4 LT	522
7a192ec3	523	int au1100fb_drv_remove(struct platform_device *dev)
3b495f2b PP	524	{
	525	struct au1100fb_device *fbdev = NULL;
	526
	527	if (!dev)
	528	return -ENODEV;
	529
5a7bbe86	530	fbdev = platform_get_drvdata(dev);
3b495f2b PP	531
	532	#if !defined(CONFIG_FRAMEBUFFER_CONSOLE) && defined(CONFIG_LOGO)
	533	au1100fb_fb_blank(VESA_POWERDOWN, &fbdev->info);
	534	#endif
	535	fbdev->regs->lcd_control &= ~LCD_CONTROL_GO;
1da177e4	536
3b495f2b PP	537	/* Clean up all probe data */
	538	unregister_framebuffer(&fbdev->info);
	539
3b495f2b	540	fb_dealloc_cmap(&fbdev->info.cmap);
3b495f2b	541
6b1889c1 ML	542	if (fbdev->lcdclk) {
	543	clk_disable_unprepare(fbdev->lcdclk);
	544	clk_put(fbdev->lcdclk);
	545	}
	546
3b495f2b PP	547	return 0;
	548	}
	549
f77f50ca	550	#ifdef CONFIG_PM
f77f50ca RG	551	static struct au1100fb_regs fbregs;
f77f50ca RG	552
7a192ec3	553	int au1100fb_drv_suspend(struct platform_device *dev, pm_message_t state)
3b495f2b	554	{
7a192ec3	555	struct au1100fb_device *fbdev = platform_get_drvdata(dev);
f77f50ca RG	556
	557	if (!fbdev)
	558	return 0;
	559
f77f50ca RG	560	/* Blank the LCD */
	561	au1100fb_fb_blank(VESA_POWERDOWN, &fbdev->info);
	562
b5c525ab	563	clk_disable(fbdev->lcdclk);
f77f50ca RG	564
	565	memcpy(&fbregs, fbdev->regs, sizeof(struct au1100fb_regs));
	566
3b495f2b PP	567	return 0;
	568	}
	569
7a192ec3	570	int au1100fb_drv_resume(struct platform_device *dev)
1da177e4	571	{
7a192ec3	572	struct au1100fb_device *fbdev = platform_get_drvdata(dev);
f77f50ca RG	573
	574	if (!fbdev)
	575	return 0;
	576
	577	memcpy(fbdev->regs, &fbregs, sizeof(struct au1100fb_regs));
	578
b5c525ab	579	clk_enable(fbdev->lcdclk);
f77f50ca RG	580
	581	/* Unblank the LCD */
	582	au1100fb_fb_blank(VESA_NO_BLANKING, &fbdev->info);
	583
3b495f2b	584	return 0;
1da177e4	585	}
f77f50ca RG	586	#else
	587	#define au1100fb_drv_suspend NULL
	588	#define au1100fb_drv_resume NULL
	589	#endif
1da177e4	590
7a192ec3 ML	591	static struct platform_driver au1100fb_driver = {
	592	.driver = {
	593	.name = "au1100-lcd",
7a192ec3	594	},
3b495f2b PP	595	.probe = au1100fb_drv_probe,
	596	.remove = au1100fb_drv_remove,
	597	.suspend = au1100fb_drv_suspend,
	598	.resume = au1100fb_drv_resume,
	599	};
55be3108	600	module_platform_driver(au1100fb_driver);
3b495f2b PP	601
	602	MODULE_DESCRIPTION(DRIVER_DESC);
	603	MODULE_LICENSE("GPL");