From 3b495f2bb749b828499135743b9ddec46e34fda8 Mon Sep 17 00:00:00 2001
From: Pete Popov <ppopov@embeddedalley.com>
Date: Mon, 4 Apr 2005 01:06:19 +0000
Subject: Au1100 FB driver uplift for 2.6.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Acked-by: Antonino Daplas <adaplas@pol.net>
---
 drivers/video/au1100fb.c | 971 ++++++++++++++++++++++++-----------------------
 1 file changed, 502 insertions(+), 469 deletions(-)

(limited to 'drivers/video/au1100fb.c')

diff --git a/drivers/video/au1100fb.c b/drivers/video/au1100fb.c
index b6fe30c3ad6..a5129806172 100644
--- a/drivers/video/au1100fb.c
+++ b/drivers/video/au1100fb.c
@@ -2,6 +2,11 @@
  * 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>
+ *
  * Copyright 2002 MontaVista Software
  * Author: MontaVista Software, Inc.
  *		ppopov@mvista.com or source@mvista.com
@@ -33,298 +38,253 @@
  *  with this program; if not, write  to the Free Software Foundation, Inc.,
  *  675 Mass Ave, Cambridge, MA 02139, USA.
  */
-
+#include <linux/config.h>
 #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/init.h>
-#include <linux/pci.h>
+#include <linux/interrupt.h>
+#include <linux/ctype.h>
+#include <linux/dma-mapping.h>
 
-#include <asm/au1000.h>
-#include <asm/pb1100.h>
-#include "au1100fb.h"
+#include <asm/mach-au1x00/au1000.h>
 
-#include <video/fbcon.h>
-#include <video/fbcon-mfb.h>
-#include <video/fbcon-cfb2.h>
-#include <video/fbcon-cfb4.h>
-#include <video/fbcon-cfb8.h>
-#include <video/fbcon-cfb16.h>
+#define DEBUG 0
+
+#include "au1100fb.h"
 
 /*
  * Sanity check. If this is a new Au1100 based board, search for
  * the PB1100 ifdefs to make sure you modify the code accordingly.
  */
-#if defined(CONFIG_MIPS_PB1100) || defined(CONFIG_MIPS_DB1100) || defined(CONFIG_MIPS_HYDROGEN3)
+#if defined(CONFIG_MIPS_PB1100)
+  #include <asm/mach-pb1x00/pb1100.h>
+#elif defined(CONFIG_MIPS_DB1100)
+  #include <asm/mach-db1x00/db1x00.h>
 #else
-error Unknown Au1100 board
+  #error "Unknown Au1100 board, Au1100 FB driver not supported"
 #endif
 
-#define CMAPSIZE 16
-
-static int my_lcd_index; /* default is zero */
-struct known_lcd_panels *p_lcd;
-AU1100_LCD *p_lcd_reg = (AU1100_LCD *)AU1100_LCD_ADDR;
-
-struct au1100fb_info {
-	struct fb_info_gen gen;
-	unsigned long fb_virt_start;
-	unsigned long fb_size;
-	unsigned long fb_phys;
-	int mmaped;
-	int nohwcursor;
+#define DRIVER_NAME "au1100fb"
+#define DRIVER_DESC "LCD controller driver for AU1100 processors"
 
-	struct { unsigned red, green, blue, pad; } palette[256];
+#define to_au1100fb_device(_info) \
+	  (_info ? container_of(_info, struct au1100fb_device, info) : NULL);
 
-#if defined(FBCON_HAS_CFB16)
-	u16 fbcon_cmap16[16];
-#endif
+/* 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 } },
 };
 
-
-struct au1100fb_par {
-        struct fb_var_screeninfo var;
-
-	int line_length;  // in bytes
-	int cmap_len;     // color-map length
+static struct fb_fix_screeninfo au1100fb_fix __initdata = {
+	.id		= "AU1100 FB",
+	.xpanstep 	= 1,
+	.ypanstep 	= 1,
+	.type		= FB_TYPE_PACKED_PIXELS,
+	.accel		= FB_ACCEL_NONE,
 };
 
-
-static struct au1100fb_info fb_info;
-static struct au1100fb_par current_par;
-static struct display disp;
-
-int au1100fb_init(void);
-void au1100fb_setup(char *options, int *ints);
-static int au1100fb_mmap(struct fb_info *fb, struct file *file,
-		struct vm_area_struct *vma);
-static int au1100_blank(int blank_mode, struct fb_info_gen *info);
-static int au1100fb_ioctl(struct inode *inode, struct file *file, u_int cmd,
-			  u_long arg, int con, struct fb_info *info);
-
-void au1100_nocursor(struct display *p, int mode, int xx, int yy){};
-
-static struct fb_ops au1100fb_ops = {
-	.owner		= THIS_MODULE,
-	.fb_get_fix	= fbgen_get_fix,
-	.fb_get_var	= fbgen_get_var,
-	.fb_set_var	= fbgen_set_var,
-	.fb_get_cmap	= fbgen_get_cmap,
-	.fb_set_cmap	= fbgen_set_cmap,
-	.fb_pan_display	= fbgen_pan_display,
-        .fb_ioctl	= au1100fb_ioctl,
-	.fb_mmap	= au1100fb_mmap,
+static struct fb_var_screeninfo au1100fb_var __initdata = {
+	.activate	= FB_ACTIVATE_NOW,
+	.height		= -1,
+	.width		= -1,
+	.vmode		= FB_VMODE_NONINTERLACED,
 };
 
-static void au1100_detect(void)
-{
-	/*
-	 *  This function should detect the current video mode settings
-	 *  and store it as the default video mode
-	 */
+static struct au1100fb_drv_info drv_info;
 
-	/*
-	 * Yeh, well, we're not going to change any settings so we're
-	 * always stuck with the default ...
+/*
+ * Set hardware with var settings. This will enable the controller with a specific
+ * mode, normally validated with the fb_check_var method
 	 */
-
-}
-
-static int au1100_encode_fix(struct fb_fix_screeninfo *fix,
-		const void *_par, struct fb_info_gen *_info)
+int au1100fb_setmode(struct au1100fb_device *fbdev)
 {
-        struct au1100fb_info *info = (struct au1100fb_info *) _info;
-        struct au1100fb_par *par = (struct au1100fb_par *) _par;
-	struct fb_var_screeninfo *var = &par->var;
-
-	memset(fix, 0, sizeof(struct fb_fix_screeninfo));
-
-	fix->smem_start = info->fb_phys;
-	fix->smem_len = info->fb_size;
-	fix->type = FB_TYPE_PACKED_PIXELS;
-	fix->type_aux = 0;
-        fix->visual = (var->bits_per_pixel == 8) ?
-	       	FB_VISUAL_PSEUDOCOLOR	: FB_VISUAL_TRUECOLOR;
-	fix->ywrapstep = 0;
-	fix->xpanstep = 1;
-	fix->ypanstep = 1;
-	fix->line_length = current_par.line_length;
-	return 0;
-}
+	struct fb_info *info = &fbdev->info;
+	u32 words;
+	int index;
 
-static void set_color_bitfields(struct fb_var_screeninfo *var)
-{
-	switch (var->bits_per_pixel) {
-	case 8:
-		var->red.offset = 0;
-		var->red.length = 8;
-		var->green.offset = 0;
-		var->green.length = 8;
-		var->blue.offset = 0;
-		var->blue.length = 8;
-		var->transp.offset = 0;
-		var->transp.length = 0;
-		break;
-	case 16:	/* RGB 565 */
-		var->red.offset = 11;
-		var->red.length = 5;
-		var->green.offset = 5;
-		var->green.length = 6;
-		var->blue.offset = 0;
-		var->blue.length = 5;
-		var->transp.offset = 0;
-		var->transp.length = 0;
-		break;
+	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;
 	}
 
-	var->red.msb_right = 0;
-	var->green.msb_right = 0;
-	var->blue.msb_right = 0;
-	var->transp.msb_right = 0;
-}
+	info->screen_size = info->fix.line_length * info->var.yres_virtual;
 
-static int au1100_decode_var(const struct fb_var_screeninfo *var,
-		void *_par, struct fb_info_gen *_info)
-{
+	/* Determine BPP mode and format */
+	fbdev->regs->lcd_control = fbdev->panel->control_base |
+			    ((info->var.rotate/90) << LCD_CONTROL_SM_BIT);
 
-	struct au1100fb_par *par = (struct au1100fb_par *)_par;
+	fbdev->regs->lcd_intenable = 0;
+	fbdev->regs->lcd_intstatus = 0;
 
-	/*
-	 * Don't allow setting any of these yet: xres and yres don't
-	 * make sense for LCD panels.
-	 */
-	if (var->xres != p_lcd->xres ||
-	    var->yres != p_lcd->yres ||
-	    var->xres != p_lcd->xres ||
-	    var->yres != p_lcd->yres) {
-		return -EINVAL;
-	}
-	if(var->bits_per_pixel != p_lcd->bpp) {
-		return -EINVAL;
-	}
+	fbdev->regs->lcd_horztiming = fbdev->panel->horztiming;
 
-	memset(par, 0, sizeof(struct au1100fb_par));
-	par->var = *var;
-
-	/* FIXME */
-	switch (var->bits_per_pixel) {
-		case 8:
-			par->var.bits_per_pixel = 8;
-			break;
-		case 16:
-			par->var.bits_per_pixel = 16;
-			break;
-		default:
-			printk("color depth %d bpp not supported\n",
-					var->bits_per_pixel);
-			return -EINVAL;
+	fbdev->regs->lcd_verttiming = fbdev->panel->verttiming;
+
+	fbdev->regs->lcd_clkcontrol = fbdev->panel->clkcontrol_base;
 
+	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);
+		}
 	}
-	set_color_bitfields(&par->var);
-	par->cmap_len = (par->var.bits_per_pixel == 8) ? 256 : 16;
-	return 0;
-}
 
-static int au1100_encode_var(struct fb_var_screeninfo *var,
-		const void *par, struct fb_info_gen *_info)
-{
+	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);
 
-	*var = ((struct au1100fb_par *)par)->var;
-	return 0;
-}
+	fbdev->regs->lcd_pwmdiv = 0;
+	fbdev->regs->lcd_pwmhi = 0;
 
-static void
-au1100_get_par(void *_par, struct fb_info_gen *_info)
-{
-	*(struct au1100fb_par *)_par = current_par;
-}
+	/* Resume controller */
+	fbdev->regs->lcd_control |= LCD_CONTROL_GO;
 
-static void au1100_set_par(const void *par, struct fb_info_gen *info)
-{
-	/* nothing to do: we don't change any settings */
+	return 0;
 }
 
-static int au1100_getcolreg(unsigned regno, unsigned *red, unsigned *green,
-			 unsigned *blue, unsigned *transp,
-			 struct fb_info *info)
+/* 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 = to_au1100fb_device(fbi);
+	u32 *palette = fbdev->regs->lcd_pallettebase;
+	u32 value;
 
-	struct au1100fb_info* i = (struct au1100fb_info*)info;
-
-	if (regno > 255)
-		return 1;
+	if (regno > (AU1100_LCD_NBR_PALETTE_ENTRIES - 1))
+		return -EINVAL;
 
-	*red    = i->palette[regno].red;
-	*green  = i->palette[regno].green;
-	*blue   = i->palette[regno].blue;
-	*transp = 0;
+	if (fbi->var.grayscale) {
+		/* Convert color to grayscale */
+		red = green = blue =
+			(19595 * red + 38470 * green + 7471 * blue) >> 16;
+	}
 
-	return 0;
-}
+	if (fbi->fix.visual == FB_VISUAL_TRUECOLOR) {
+		/* Place color in the pseudopalette */
+		if (regno > 16)
+			return -EINVAL;
 
-static int au1100_setcolreg(unsigned regno, unsigned red, unsigned green,
-			 unsigned blue, unsigned transp,
-			 struct fb_info *info)
-{
-	struct au1100fb_info* i = (struct au1100fb_info *)info;
-	u32 rgbcol;
-
-	if (regno > 255)
-		return 1;
-
-	i->palette[regno].red    = red;
-	i->palette[regno].green  = green;
-	i->palette[regno].blue   = blue;
-
-	switch(p_lcd->bpp) {
-#ifdef FBCON_HAS_CFB8
-	case 8:
-		red >>= 10;
-		green >>= 10;
-		blue >>= 10;
-		p_lcd_reg->lcd_pallettebase[regno] = (blue&0x1f) |
-			((green&0x3f)<<5) | ((red&0x1f)<<11);
-		break;
-#endif
-#ifdef FBCON_HAS_CFB16
-	case 16:
-		i->fbcon_cmap16[regno] =
-			((red & 0xf800) >> 0) |
-			((green & 0xfc00) >> 5) |
-			((blue & 0xf800) >> 11);
-		break;
-#endif
-	default:
-		break;
+		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;
 }
 
-
-static int  au1100_blank(int blank_mode, struct fb_info_gen *_info)
+/* fb_blank
+ * Blank the screen. Depending on the mode, the screen will be
+ * activated with the backlight color, or desactivated
+ */
+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 */
-		//printk("turn on panel\n");
+			/* Turn on panel */
+			fbdev->regs->lcd_control |= LCD_CONTROL_GO;
 #ifdef CONFIG_MIPS_PB1100
-		p_lcd_reg->lcd_control |= LCD_CONTROL_GO;
-		au_writew(au_readw(PB1100_G_CONTROL) | p_lcd->mode_backlight,
+			if (drv_info.panel_idx == 1) {
+				au_writew(au_readw(PB1100_G_CONTROL)
+					  | (PB1100_G_CONTROL_BL | PB1100_G_CONTROL_VDD),
 			PB1100_G_CONTROL);
-#endif
-#ifdef CONFIG_MIPS_HYDROGEN3
-		/*  Turn controller & power supply on,  GPIO213 */
-		au_writel(0x20002000, 0xB1700008);
-		au_writel(0x00040000, 0xB1900108);
-		au_writel(0x01000100, 0xB1700008);
+			}
 #endif
 		au_sync();
 		break;
@@ -332,12 +292,14 @@ static int  au1100_blank(int blank_mode, struct fb_info_gen *_info)
 	case VESA_VSYNC_SUSPEND:
 	case VESA_HSYNC_SUSPEND:
 	case VESA_POWERDOWN:
-		/* turn off panel */
-		//printk("turn off panel\n");
+			/* Turn off panel */
+			fbdev->regs->lcd_control &= ~LCD_CONTROL_GO;
 #ifdef CONFIG_MIPS_PB1100
-		au_writew(au_readw(PB1100_G_CONTROL) & ~p_lcd->mode_backlight,
+			if (drv_info.panel_idx == 1) {
+				au_writew(au_readw(PB1100_G_CONTROL)
+				  	  & ~(PB1100_G_CONTROL_BL | PB1100_G_CONTROL_VDD),
 			PB1100_G_CONTROL);
-		p_lcd_reg->lcd_control &= ~LCD_CONTROL_GO;
+			}
 #endif
 		au_sync();
 		break;
@@ -348,49 +310,87 @@ static int  au1100_blank(int blank_mode, struct fb_info_gen *_info)
 	return 0;
 }
 
-static void au1100_set_disp(const void *unused, struct display *disp,
-			 struct fb_info_gen *info)
+/* 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)
 {
-	disp->screen_base = (char *)fb_info.fb_virt_start;
-
-	switch (disp->var.bits_per_pixel) {
-#ifdef FBCON_HAS_CFB8
-	case 8:
-		disp->dispsw = &fbcon_cfb8;
-		if (fb_info.nohwcursor)
-			fbcon_cfb8.cursor = au1100_nocursor;
-		break;
-#endif
-#ifdef FBCON_HAS_CFB16
-	case 16:
-		disp->dispsw = &fbcon_cfb16;
-		disp->dispsw_data = fb_info.fbcon_cmap16;
-		if (fb_info.nohwcursor)
-			fbcon_cfb16.cursor = au1100_nocursor;
-		break;
-#endif
-	default:
-		disp->dispsw = &fbcon_dummy;
-		disp->dispsw_data = NULL;
-		break;
+	struct au1100fb_device *fbdev = to_au1100fb_device(fbi);
+	int dy;
+
+	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_rotate
+ * Rotate the display of this angle. This doesn't seems to be used by the core,
+ * but as our hardware supports it, so why not implementing it...
+ */
+void au1100fb_fb_rotate(struct fb_info *fbi, int angle)
+{
+	struct au1100fb_device *fbdev = to_au1100fb_device(fbi);
+
+	print_dbg("fb_rotate %p %d", fbi, angle);
+
+	if (fbdev && (angle > 0) && !(angle % 90)) {
+
+		fbdev->regs->lcd_control &= ~LCD_CONTROL_GO;
+
+		fbdev->regs->lcd_control &= ~(LCD_CONTROL_SM_MASK);
+		fbdev->regs->lcd_control |= ((angle/90) << LCD_CONTROL_SM_BIT);
+
+		fbdev->regs->lcd_control |= LCD_CONTROL_GO;
 	}
 }
 
-static int
-au1100fb_mmap(struct fb_info *_fb,
-	     struct file *file,
-	     struct vm_area_struct *vma)
+/* 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 file *file, struct vm_area_struct *vma)
 {
+	struct au1100fb_device *fbdev = to_au1100fb_device(fbi);
 	unsigned int len;
 	unsigned long start=0, off;
-	struct au1100fb_info *fb = (struct au1100fb_info *)_fb;
 
 	if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT)) {
 		return -EINVAL;
 	}
 
-	start = fb_info.fb_phys & PAGE_MASK;
-	len = PAGE_ALIGN((start & ~PAGE_MASK) + fb_info.fb_size);
+	start = fbdev->fb_phys & PAGE_MASK;
+	len = PAGE_ALIGN((start & ~PAGE_MASK) + fbdev->fb_len);
 
 	off = vma->vm_pgoff << PAGE_SHIFT;
 
@@ -401,276 +401,309 @@ au1100fb_mmap(struct fb_info *_fb,
 	off += start;
 	vma->vm_pgoff = off >> PAGE_SHIFT;
 
-	pgprot_val(vma->vm_page_prot) &= ~_CACHE_MASK;
-	//pgprot_val(vma->vm_page_prot) |= _CACHE_CACHABLE_NONCOHERENT;
+	vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
 	pgprot_val(vma->vm_page_prot) |= (6 << 9); //CCA=6
 
-	/* This is an IO map - tell maydump to skip this VMA */
 	vma->vm_flags |= VM_IO;
 
-	if (io_remap_pfn_range(vma, vma->vm_start, off >> PAGE_SHIFT,
+	if (io_remap_page_range(vma, vma->vm_start, off,
 				vma->vm_end - vma->vm_start,
 				vma->vm_page_prot)) {
 		return -EAGAIN;
 	}
 
-	fb->mmaped = 1;
 	return 0;
 }
 
-int au1100_pan_display(const struct fb_var_screeninfo *var,
-		       struct fb_info_gen *info)
+static struct fb_ops au1100fb_ops =
 {
-	return 0;
-}
+	.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_rotate		= au1100fb_fb_rotate,
+	.fb_mmap		= au1100fb_fb_mmap,
+};
 
-static int au1100fb_ioctl(struct inode *inode, struct file *file, u_int cmd,
-			  u_long arg, int con, struct fb_info *info)
-{
-	/* nothing to do yet */
-	return -EINVAL;
-}
 
-static struct fbgen_hwswitch au1100_switch = {
-	au1100_detect,
-	au1100_encode_fix,
-	au1100_decode_var,
-	au1100_encode_var,
-	au1100_get_par,
-	au1100_set_par,
-	au1100_getcolreg,
-	au1100_setcolreg,
-	au1100_pan_display,
-	au1100_blank,
-	au1100_set_disp
-};
+/*-------------------------------------------------------------------------*/
 
+/* AU1100 LCD controller device driver */
 
-int au1100_setmode(void)
+int au1100fb_drv_probe(struct device *dev)
 {
-	int words;
-
-	/* FIXME Need to accomodate for swivel mode and 12bpp, <8bpp*/
-	switch (p_lcd->mode_control & LCD_CONTROL_SM)
-	{
-		case LCD_CONTROL_SM_0:
-		case LCD_CONTROL_SM_180:
-		words = (p_lcd->xres * p_lcd->yres * p_lcd->bpp) / 32;
-			break;
-		case LCD_CONTROL_SM_90:
-		case LCD_CONTROL_SM_270:
-			/* is this correct? */
-		words = (p_lcd->xres * p_lcd->bpp) / 8;
-			break;
-		default:
-			printk("mode_control reg not initialized\n");
+	struct au1100fb_device *fbdev = NULL;
+	struct resource *regs_res;
+	unsigned long page;
+	u32 sys_clksrc;
+
+	if (!dev)
 			return -EINVAL;
+
+	/* Allocate new device private */
+	if (!(fbdev = kmalloc(sizeof(struct au1100fb_device), GFP_KERNEL))) {
+		print_err("fail to allocate device private record");
+		return -ENOMEM;
 	}
+	memset((void*)fbdev, 0, sizeof(struct au1100fb_device));
 
-	/*
-	 * Setup LCD controller
-	 */
+	fbdev->panel = &known_lcd_panels[drv_info.panel_idx];
 
-	p_lcd_reg->lcd_control = p_lcd->mode_control;
-	p_lcd_reg->lcd_intstatus = 0;
-	p_lcd_reg->lcd_intenable = 0;
-	p_lcd_reg->lcd_horztiming = p_lcd->mode_horztiming;
-	p_lcd_reg->lcd_verttiming = p_lcd->mode_verttiming;
-	p_lcd_reg->lcd_clkcontrol = p_lcd->mode_clkcontrol;
-	p_lcd_reg->lcd_words = words - 1;
-	p_lcd_reg->lcd_dmaaddr0 = fb_info.fb_phys;
+	dev_set_drvdata(dev, (void*)fbdev);
 
-	/* turn on panel */
-#ifdef CONFIG_MIPS_PB1100
-	au_writew(au_readw(PB1100_G_CONTROL) | p_lcd->mode_backlight,
-			PB1100_G_CONTROL);
-#endif
-#ifdef CONFIG_MIPS_HYDROGEN3
-	/*  Turn controller & power supply on,  GPIO213 */
-	au_writel(0x20002000, 0xB1700008);
-	au_writel(0x00040000, 0xB1900108);
-	au_writel(0x01000100, 0xB1700008);
-#endif
+	/* Allocate region for our registers and map them */
+	if (!(regs_res = platform_get_resource(to_platform_device(dev),
+					IORESOURCE_MEM, 0))) {
+		print_err("fail to retrieve registers resource");
+		return -EFAULT;
+	}
 
-	p_lcd_reg->lcd_control |= LCD_CONTROL_GO;
+	au1100fb_fix.mmio_start = regs_res->start;
+	au1100fb_fix.mmio_len = regs_res->end - regs_res->start + 1;
 
-	return 0;
-}
+	if (!request_mem_region(au1100fb_fix.mmio_start, au1100fb_fix.mmio_len,
+				DRIVER_NAME)) {
+		print_err("fail to lock memory region at 0x%08x",
+				au1100fb_fix.mmio_start);
+		return -EBUSY;
+	}
 
+	fbdev->regs = (struct au1100fb_regs*)KSEG1ADDR(au1100fb_fix.mmio_start);
 
-int __init au1100fb_init(void)
-{
-	uint32 sys_clksrc;
-	unsigned long page;
+	print_dbg("Register memory map at %p", fbdev->regs);
+	print_dbg("phys=0x%08x, size=%d", fbdev->regs_phys, fbdev->regs_len);
 
-	/*
-	* Get the panel information/display mode and update the registry
-	*/
-	p_lcd = &panels[my_lcd_index];
-
-	switch (p_lcd->mode_control & LCD_CONTROL_SM)
-	{
-		case LCD_CONTROL_SM_0:
-		case LCD_CONTROL_SM_180:
-		p_lcd->xres =
-			(p_lcd->mode_horztiming & LCD_HORZTIMING_PPL) + 1;
-		p_lcd->yres =
-			(p_lcd->mode_verttiming & LCD_VERTTIMING_LPP) + 1;
-			break;
-		case LCD_CONTROL_SM_90:
-		case LCD_CONTROL_SM_270:
-		p_lcd->yres =
-			(p_lcd->mode_horztiming & LCD_HORZTIMING_PPL) + 1;
-		p_lcd->xres =
-			(p_lcd->mode_verttiming & LCD_VERTTIMING_LPP) + 1;
-			break;
-	}
 
-	/*
-	 * Panel dimensions x bpp must be divisible by 32
-	 */
-	if (((p_lcd->yres * p_lcd->bpp) % 32) != 0)
-		printk("VERT %% 32\n");
-	if (((p_lcd->xres * p_lcd->bpp) % 32) != 0)
-		printk("HORZ %% 32\n");
 
-	/*
-	 * Allocate LCD framebuffer from system memory
-	 */
-	fb_info.fb_size = (p_lcd->xres * p_lcd->yres * p_lcd->bpp) / 8;
-
-	current_par.var.xres = p_lcd->xres;
-	current_par.var.xres_virtual = p_lcd->xres;
-	current_par.var.yres = p_lcd->yres;
-	current_par.var.yres_virtual = p_lcd->yres;
-	current_par.var.bits_per_pixel = p_lcd->bpp;
-
-	/* FIX!!! only works for 8/16 bpp */
-	current_par.line_length = p_lcd->xres * p_lcd->bpp / 8; /* in bytes */
-	fb_info.fb_virt_start = (unsigned long )
-		__get_free_pages(GFP_ATOMIC | GFP_DMA,
-				get_order(fb_info.fb_size + 0x1000));
-	if (!fb_info.fb_virt_start) {
-		printk("Unable to allocate fb memory\n");
+	/* 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 = dma_alloc_coherent(dev, PAGE_ALIGN(fbdev->fb_len),
+					&fbdev->fb_phys, GFP_KERNEL);
+	if (!fbdev->fb_mem) {
+		print_err("fail to allocate frambuffer (size: %dK))",
+			  fbdev->fb_len / 1024);
 		return -ENOMEM;
 	}
-	fb_info.fb_phys = virt_to_bus((void *)fb_info.fb_virt_start);
+
+	au1100fb_fix.smem_start = fbdev->fb_phys;
+	au1100fb_fix.smem_len = fbdev->fb_len;
 
 	/*
 	 * Set page reserved so that mmap will work. This is necessary
 	 * since we'll be remapping normal memory.
 	 */
-	for (page = fb_info.fb_virt_start;
-	     page < PAGE_ALIGN(fb_info.fb_virt_start + fb_info.fb_size);
+	for (page = (unsigned long)fbdev->fb_mem;
+	     page < PAGE_ALIGN((unsigned long)fbdev->fb_mem + fbdev->fb_len);
 	     page += PAGE_SIZE) {
+#if CONFIG_DMA_NONCOHERENT
+		SetPageReserved(virt_to_page(CAC_ADDR(page)));
+#else
 		SetPageReserved(virt_to_page(page));
+#endif
 	}
 
-	memset((void *)fb_info.fb_virt_start, 0, fb_info.fb_size);
-
-	/* set freqctrl now to allow more time to stabilize */
-	/* zero-out out LCD bits */
-	sys_clksrc = au_readl(SYS_CLKSRC) & ~0x000003e0;
-	sys_clksrc |= p_lcd->mode_toyclksrc;
-	au_writel(sys_clksrc, SYS_CLKSRC);
-
-	/* FIXME add check to make sure auxpll is what is expected! */
-	au1100_setmode();
-
-	fb_info.gen.parsize = sizeof(struct au1100fb_par);
-	fb_info.gen.fbhw = &au1100_switch;
-
-	strcpy(fb_info.gen.info.modename, "Au1100 LCD");
-	fb_info.gen.info.changevar = NULL;
-	fb_info.gen.info.node = -1;
-
-	fb_info.gen.info.fbops = &au1100fb_ops;
-	fb_info.gen.info.disp = &disp;
-	fb_info.gen.info.switch_con = &fbgen_switch;
-	fb_info.gen.info.updatevar = &fbgen_update_var;
-	fb_info.gen.info.blank = &fbgen_blank;
-	fb_info.gen.info.flags = FBINFO_FLAG_DEFAULT;
-
-	/* This should give a reasonable default video mode */
-	fbgen_get_var(&disp.var, -1, &fb_info.gen.info);
-	fbgen_do_set_var(&disp.var, 1, &fb_info.gen);
-	fbgen_set_disp(-1, &fb_info.gen);
-	fbgen_install_cmap(0, &fb_info.gen);
-	if (register_framebuffer(&fb_info.gen.info) < 0)
-		return -EINVAL;
-	printk(KERN_INFO "fb%d: %s frame buffer device\n",
-			GET_FB_IDX(fb_info.gen.info.node),
-			fb_info.gen.info.modename);
+	print_dbg("Framebuffer memory map at %p", fbdev->fb_mem);
+	print_dbg("phys=0x%08x, size=%dK", fbdev->fb_phys, fbdev->fb_len / 1024);
+
+	/* Setup LCD clock to AUX (48 MHz) */
+	sys_clksrc = au_readl(SYS_CLKSRC) & ~(SYS_CS_ML_MASK | SYS_CS_DL | SYS_CS_CL);
+	au_writel((sys_clksrc | (1 << SYS_CS_ML_BIT)), SYS_CLKSRC);
+
+	/* 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;
+
+	if (!(fbdev->info.pseudo_palette = kmalloc(sizeof(u32) * 16, GFP_KERNEL))) {
+		return -ENOMEM;
+	}
+	memset(fbdev->info.pseudo_palette, 0, sizeof(u32) * 16);
+
+	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);
+		kfree(fbdev->info.pseudo_palette);
+		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->regs) {
+		release_mem_region(fbdev->regs_phys, fbdev->regs_len);
+	}
+	if (fbdev->fb_mem) {
+		dma_free_noncoherent(dev, fbdev->fb_len, fbdev->fb_mem, fbdev->fb_phys);
+	}
+	if (fbdev->info.cmap.len != 0) {
+		fb_dealloc_cmap(&fbdev->info.cmap);
+	}
+	kfree(fbdev);
+	dev_set_drvdata(dev, NULL);
 
 	return 0;
 }
 
+int au1100fb_drv_remove(struct device *dev)
+{
+	struct au1100fb_device *fbdev = NULL;
+
+	if (!dev)
+		return -ENODEV;
+
+	fbdev = (struct au1100fb_device*) dev_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;
 
-void au1100fb_cleanup(struct fb_info *info)
+	/* Clean up all probe data */
+	unregister_framebuffer(&fbdev->info);
+
+	release_mem_region(fbdev->regs_phys, fbdev->regs_len);
+
+	dma_free_coherent(dev, PAGE_ALIGN(fbdev->fb_len), fbdev->fb_mem, fbdev->fb_phys);
+
+	fb_dealloc_cmap(&fbdev->info.cmap);
+	kfree(fbdev->info.pseudo_palette);
+	kfree((void*)fbdev);
+
+	return 0;
+}
+
+int au1100fb_drv_suspend(struct device *dev, u32 state, u32 level)
+{
+	/* TODO */
+	return 0;
+}
+
+int au1100fb_drv_resume(struct device *dev, u32 level)
 {
-	unregister_framebuffer(info);
+	/* TODO */
+	return 0;
 }
 
+static struct device_driver au1100fb_driver = {
+	.name		= "au1100-lcd",
+	.bus		= &platform_bus_type,
 
-void au1100fb_setup(char *options, int *ints)
+	.probe		= au1100fb_drv_probe,
+        .remove		= au1100fb_drv_remove,
+	.suspend	= au1100fb_drv_suspend,
+        .resume		= au1100fb_drv_resume,
+};
+
+/*-------------------------------------------------------------------------*/
+
+/* Kernel driver */
+
+int au1100fb_setup(char *options)
 {
 	char* this_opt;
-	int i;
-	int num_panels = sizeof(panels)/sizeof(struct known_lcd_panels);
+	int num_panels = ARRAY_SIZE(known_lcd_panels);
+	char* mode = NULL;
+	int panel_idx = 0;
 
+	if (num_panels <= 0) {
+		print_err("No LCD panels supported by driver!");
+		return -EFAULT;
+			}
 
-	if (!options || !*options)
-		return;
-
-	for(this_opt=strtok(options, ","); this_opt;
-	    this_opt=strtok(NULL, ",")) {
+	if (options) {
+		while ((this_opt = strsep(&options,",")) != NULL) {
+			/* Panel option */
 		if (!strncmp(this_opt, "panel:", 6)) {
-#if defined(CONFIG_MIPS_PB1100) || defined(CONFIG_MIPS_DB1100)
-			/* Read Pb1100 Switch S10 ? */
-			if (!strncmp(this_opt+6, "s10", 3))
-			{
-				int panel;
-				panel = *(volatile int *)0xAE000008; /* BCSR SWITCHES */
-				panel >>= 8;
-				panel &= 0x0F;
-				if (panel >= num_panels) panel = 0;
-				my_lcd_index = panel;
-			}
-			else
-#endif
-			/* Get the panel name, everything else if fixed */
-			for (i=0; i<num_panels; i++) {
-				if (!strncmp(this_opt+6, panels[i].panel_name,
+				int i;
+				this_opt += 6;
+				for (i = 0; i < num_panels; i++) {
+					if (!strncmp(this_opt,
+					      	     known_lcd_panels[i].name,
 							strlen(this_opt))) {
-					my_lcd_index = i;
+						panel_idx = i;
 					break;
 				}
 			}
+				if (i >= num_panels) {
+ 					print_warn("Panel %s not supported!", this_opt);
+				}
+			}
+			/* Mode option (only option that start with digit) */
+			else if (isdigit(this_opt[0])) {
+				mode = kmalloc(strlen(this_opt) + 1, GFP_KERNEL);
+				strncpy(mode, this_opt, strlen(this_opt) + 1);
+			}
+			/* Unsupported option */
+			else {
+				print_warn("Unsupported option \"%s\"", this_opt);
 		}
-		else if (!strncmp(this_opt, "nohwcursor", 10)) {
-			printk("nohwcursor\n");
-			fb_info.nohwcursor = 1;
 		}
 	}
 
-	printk("au1100fb: Panel %d %s\n", my_lcd_index,
-		panels[my_lcd_index].panel_name);
-}
+	drv_info.panel_idx = panel_idx;
+	drv_info.opt_mode = mode;
 
+	print_info("Panel=%s Mode=%s",
+			known_lcd_panels[drv_info.panel_idx].name,
+		      	drv_info.opt_mode ? drv_info.opt_mode : "default");
 
+	return 0;
+}
 
-#ifdef MODULE
-MODULE_LICENSE("GPL");
-int init_module(void)
+int __init au1100fb_init(void)
 {
-	return au1100fb_init();
+	char* options;
+	int ret;
+
+	print_info("" DRIVER_DESC "");
+
+	memset(&drv_info, 0, sizeof(drv_info));
+
+	if (fb_get_options(DRIVER_NAME, &options))
+		return -ENODEV;
+
+	/* Setup driver with options */
+	ret = au1100fb_setup(options);
+	if (ret < 0) {
+		print_err("Fail to setup driver");
+		return ret;
+	}
+
+	return driver_register(&au1100fb_driver);
 }
 
-void cleanup_module(void)
+void __exit au1100fb_cleanup(void)
 {
-	au1100fb_cleanup(void);
+	driver_unregister(&au1100fb_driver);
+
+	if (drv_info.opt_mode)
+		kfree(drv_info.opt_mode);
 }
 
-MODULE_AUTHOR("Pete Popov <ppopov@mvista.com>");
-MODULE_DESCRIPTION("Au1100 LCD framebuffer device driver");
-#endif /* MODULE */
+module_init(au1100fb_init);
+module_exit(au1100fb_cleanup);
+
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE("GPL");
-- 
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