au1200fb.c

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		| LCD_WINCTRL2_DBM
		| LCD_WINCTRL2_BX_N( fbdev->fb_info.fix.line_length)
		| LCD_WINCTRL2_SCX_1
		| LCD_WINCTRL2_SCY_1
		) ;
	lcd->winenable |= win->w[plane].mode_winenable;
	au_sync();
}


/* Inline helpers */

/*#define panel_is_dual(panel)  ((panel->mode_screen & LCD_SCREEN_PT) == LCD_SCREEN_PT_010)*/
/*#define panel_is_active(panel)((panel->mode_screen & LCD_SCREEN_PT) == LCD_SCREEN_PT_010)*/

#define panel_is_color(panel) ((panel->mode_screen & LCD_SCREEN_PT) <= LCD_SCREEN_PT_CDSTN)

/* Bitfields format supported by the controller. */
static struct fb_bitfield rgb_bitfields[][4] = {
  	/*     Red, 	   Green, 	 Blue, 	     Transp   */
	[LCD_WINCTRL1_FRM_16BPP655 >> 25] =
		{ { 10, 6, 0 }, { 5, 5, 0 }, { 0, 5, 0 }, { 0, 0, 0 } },

	[LCD_WINCTRL1_FRM_16BPP565 >> 25] =
		{ { 11, 5, 0 }, { 5, 6, 0 }, { 0, 5, 0 }, { 0, 0, 0 } },

	[LCD_WINCTRL1_FRM_16BPP556 >> 25] =
		{ { 11, 5, 0 }, { 6, 5, 0 }, { 0, 6, 0 }, { 0, 0, 0 } },

	[LCD_WINCTRL1_FRM_16BPPI1555 >> 25] =
		{ { 10, 5, 0 }, { 5, 5, 0 }, { 0, 5, 0 }, { 0, 0, 0 } },

	[LCD_WINCTRL1_FRM_16BPPI5551 >> 25] =
		{ { 11, 5, 0 }, { 6, 5, 0 }, { 1, 5, 0 }, { 0, 0, 0 } },

	[LCD_WINCTRL1_FRM_16BPPA1555 >> 25] =
		{ { 10, 5, 0 }, { 5, 5, 0 }, { 0, 5, 0 }, { 15, 1, 0 } },

	[LCD_WINCTRL1_FRM_16BPPA5551 >> 25] =
		{ { 11, 5, 0 }, { 6, 5, 0 }, { 1, 5, 0 }, { 0, 1, 0 } },

	[LCD_WINCTRL1_FRM_24BPP >> 25] =
		{ { 16, 8, 0 }, { 8, 8, 0 }, { 0, 8, 0 }, { 0, 0, 0 } },

	[LCD_WINCTRL1_FRM_32BPP >> 25] =
		{ { 16, 8, 0 }, { 8, 8, 0 }, { 0, 8, 0 }, { 24, 0, 0 } },
};

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

/* Helpers */

static void au1200fb_update_fbinfo(struct fb_info *fbi)
{
	/* FIX!!!! This also needs to take the window pixel format into account!!! */

	/* Update var-dependent FB info */
	if (panel_is_color(panel)) {
		if (fbi->var.bits_per_pixel <= 8) {
			/* palettized */
			fbi->fix.visual = FB_VISUAL_PSEUDOCOLOR;
			fbi->fix.line_length = fbi->var.xres_virtual /
				(8/fbi->var.bits_per_pixel);
		} else {
			/* non-palettized */
			fbi->fix.visual = FB_VISUAL_TRUECOLOR;
			fbi->fix.line_length = fbi->var.xres_virtual * (fbi->var.bits_per_pixel / 8);
		}
	} else {
		/* mono FIX!!! mono 8 and 4 bits */
		fbi->fix.visual = FB_VISUAL_MONO10;
		fbi->fix.line_length = fbi->var.xres_virtual / 8;
	}

	fbi->screen_size = fbi->fix.line_length * fbi->var.yres_virtual;
	print_dbg("line length: %d\n", fbi->fix.line_length);
	print_dbg("bits_per_pixel: %d\n", fbi->var.bits_per_pixel);
}

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

/* AU1200 framebuffer driver */

/* fb_check_var
 * Validate var settings with hardware restrictions and modify it if necessary
 */
static int au1200fb_fb_check_var(struct fb_var_screeninfo *var,
	struct fb_info *fbi)
{
	struct au1200fb_device *fbdev = (struct au1200fb_device *)fbi;
	u32 pixclock;
	int screen_size, plane;

	plane = fbdev->plane;

	/* Make sure that the mode respect all LCD controller and
	 * panel restrictions. */
	var->xres = win->w[plane].xres;
	var->yres = win->w[plane].yres;

	/* No need for virtual resolution support */
	var->xres_virtual = var->xres;
	var->yres_virtual = var->yres;

	var->bits_per_pixel = winbpp(win->w[plane].mode_winctrl1);

	screen_size = var->xres_virtual * var->yres_virtual;
	if (var->bits_per_pixel > 8) screen_size *= (var->bits_per_pixel / 8);
	else screen_size /= (8/var->bits_per_pixel);

	if (fbdev->fb_len < screen_size)
		return -EINVAL; /* Virtual screen is to big, abort */

	/* FIX!!!! what are the implicaitons of ignoring this for windows ??? */
	/* The max LCD clock is fixed to 48MHz (value of AUX_CLK). The pixel
	 * clock can only be obtain by dividing this value by an even integer.
	 * Fallback to a slower pixel clock if necessary. */
	pixclock = max((u32)(PICOS2KHZ(var->pixclock) * 1000), fbi->monspecs.dclkmin);
	pixclock = min(pixclock, min(fbi->monspecs.dclkmax, (u32)AU1200_LCD_MAX_CLK/2));

	if (AU1200_LCD_MAX_CLK % pixclock) {
		int diff = AU1200_LCD_MAX_CLK % pixclock;
		pixclock -= diff;
	}

	var->pixclock = KHZ2PICOS(pixclock/1000);
#if 0
	if (!panel_is_active(panel)) {
		int pcd = AU1200_LCD_MAX_CLK / (pixclock * 2) - 1;

		if (!panel_is_color(panel)
			&& (panel->control_base & LCD_CONTROL_MPI) && (pcd < 3)) {
			/* STN 8bit mono panel support is up to 6MHz pixclock */
			var->pixclock = KHZ2PICOS(6000);
		} else if (!pcd) {
			/* Other STN panel support is up to 12MHz  */
			var->pixclock = KHZ2PICOS(12000);
		}
	}
#endif
	/* Set bitfield accordingly */
	switch (var->bits_per_pixel) {
		case 16:
		{
			/* 16bpp True color.
			 * These must be set to MATCH WINCTRL[FORM] */
			int idx;
			idx = (win->w[0].mode_winctrl1 & LCD_WINCTRL1_FRM) >> 25;
			var->red    = rgb_bitfields[idx][0];
			var->green  = rgb_bitfields[idx][1];
			var->blue   = rgb_bitfields[idx][2];
			var->transp = rgb_bitfields[idx][3];
			break;
		}

		case 32:
		{
			/* 32bpp True color.
			 * These must be set to MATCH WINCTRL[FORM] */
			int idx;
			idx = (win->w[0].mode_winctrl1 & LCD_WINCTRL1_FRM) >> 25;
			var->red    = rgb_bitfields[idx][0];
			var->green  = rgb_bitfields[idx][1];
			var->blue   = rgb_bitfields[idx][2];
			var->transp = rgb_bitfields[idx][3];
			break;
		}
		default:
			print_dbg("Unsupported depth %dbpp", var->bits_per_pixel);
			return -EINVAL;
	}

	return 0;
}

/* fb_set_par
 * Set hardware with var settings. This will enable the controller with a
 * specific mode, normally validated with the fb_check_var method
 */
static int au1200fb_fb_set_par(struct fb_info *fbi)
{
	struct au1200fb_device *fbdev = (struct au1200fb_device *)fbi;

	au1200fb_update_fbinfo(fbi);
	au1200_setmode(fbdev);

	return 0;
}

/* fb_setcolreg
 * Set color in LCD palette.
 */
static int au1200fb_fb_setcolreg(unsigned regno, unsigned red, unsigned green,
	unsigned blue, unsigned transp, struct fb_info *fbi)
{
	volatile u32 *palette = lcd->palette;
	u32 value;

	if (regno > (AU1200_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 (1 /*FIX!!! panel_is_active(fbdev->panel)*/) {
		/* COLOR TFT PALLETTIZED (use RGB 565) */
		value = (red & 0xF800)|((green >> 5) &
				0x07E0)|((blue >> 11) & 0x001F);
		value &= 0xFFFF;

	} else if (0 /*panel_is_color(fbdev->panel)*/) {
		/* COLOR STN MODE */
		value = 0x1234;
		value &= 0xFFF;
	} else {
		/* MONOCHROME MODE */
		value = (green >> 12) & 0x000F;
		value &= 0xF;
	}

	palette[regno] = value;

	return 0;
}

/* fb_blank
 * Blank the screen. Depending on the mode, the screen will be
 * activated with the backlight color, or desactivated
 */
static int au1200fb_fb_blank(int blank_mode, struct fb_info *fbi)
{
	/* Short-circuit screen blanking */
	if (noblanking)
		return 0;

	switch (blank_mode) {

	case FB_BLANK_UNBLANK:
	case FB_BLANK_NORMAL:
		/* printk("turn on panel\n"); */
		au1200_setpanel(panel);
		break;
	case FB_BLANK_VSYNC_SUSPEND:
	case FB_BLANK_HSYNC_SUSPEND:
	case FB_BLANK_POWERDOWN:
		/* printk("turn off panel\n"); */
		au1200_setpanel(NULL);
		break;
	default:
		break;

	}

	/* FB_BLANK_NORMAL is a soft blank */
	return (blank_mode == FB_BLANK_NORMAL) ? -EINVAL : 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)
 */
static int au1200fb_fb_mmap(struct fb_info *info, struct vm_area_struct *vma)

{
	unsigned int len;
	unsigned long start=0, off;
	struct au1200fb_device *fbdev = (struct au1200fb_device *) info;

#ifdef CONFIG_PM
	au1xxx_pm_access(LCD_pm_dev);
#endif

	if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT)) {
		return -EINVAL;
	}

	start = fbdev->fb_phys & PAGE_MASK;
	len = PAGE_ALIGN((start & ~PAGE_MASK) + fbdev->fb_len);

	off = vma->vm_pgoff << PAGE_SHIFT;

	if ((vma->vm_end - vma->vm_start + off) > len) {
		return -EINVAL;
	}

	off += start;
	vma->vm_pgoff = off >> PAGE_SHIFT;

	vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
	pgprot_val(vma->vm_page_prot) |= _CACHE_MASK; /* CCA=7 */

	vma->vm_flags |= VM_IO;

	return io_remap_pfn_range(vma, vma->vm_start, off >> PAGE_SHIFT,
				  vma->vm_end - vma->vm_start,
				  vma->vm_page_prot);

	return 0;
}

static void set_global(u_int cmd, struct au1200_lcd_global_regs_t *pdata)
{

	unsigned int hi1, divider;

	/* SCREEN_SIZE: user cannot reset size, must switch panel choice */

	if (pdata->flags & SCREEN_BACKCOLOR)
		lcd->backcolor = pdata->backcolor;

	if (pdata->flags & SCREEN_BRIGHTNESS) {

		// limit brightness pwm duty to >= 30/1600
		if (pdata->brightness < 30) {
			pdata->brightness = 30;
		}
		divider = (lcd->pwmdiv & 0x3FFFF) + 1;
		hi1 = (lcd->pwmhi >> 16) + 1;
		hi1 = (((pdata->brightness & 0xFF)+1) * divider >> 8);
		lcd->pwmhi &= 0xFFFF;
		lcd->pwmhi |= (hi1 << 16);
	}

	if (pdata->flags & SCREEN_COLORKEY)
		lcd->colorkey = pdata->colorkey;

	if (pdata->flags & SCREEN_MASK)
		lcd->colorkeymsk = pdata->mask;
	au_sync();
}

static void get_global(u_int cmd, struct au1200_lcd_global_regs_t *pdata)
{
	unsigned int hi1, divider;

	pdata->xsize = ((lcd->screen & LCD_SCREEN_SX) >> 19) + 1;
	pdata->ysize = ((lcd->screen & LCD_SCREEN_SY) >> 8) + 1;

	pdata->backcolor = lcd->backcolor;
	pdata->colorkey = lcd->colorkey;
	pdata->mask = lcd->colorkeymsk;

	// brightness
	hi1 = (lcd->pwmhi >> 16) + 1;
	divider = (lcd->pwmdiv & 0x3FFFF) + 1;
	pdata->brightness = ((hi1 << 8) / divider) - 1;
	au_sync();
}

static void set_window(unsigned int plane,
	struct au1200_lcd_window_regs_t *pdata)
{
	unsigned int val, bpp;

	/* Window control register 0 */
	if (pdata->flags & WIN_POSITION) {
		val = lcd->window[plane].winctrl0 & ~(LCD_WINCTRL0_OX |
				LCD_WINCTRL0_OY);
		val |= ((pdata->xpos << 21) & LCD_WINCTRL0_OX);
		val |= ((pdata->ypos << 10) & LCD_WINCTRL0_OY);
		lcd->window[plane].winctrl0 = val;
	}
	if (pdata->flags & WIN_ALPHA_COLOR) {
		val = lcd->window[plane].winctrl0 & ~(LCD_WINCTRL0_A);
		val |= ((pdata->alpha_color << 2) & LCD_WINCTRL0_A);
		lcd->window[plane].winctrl0 = val;
	}
	if (pdata->flags & WIN_ALPHA_MODE) {
		val = lcd->window[plane].winctrl0 & ~(LCD_WINCTRL0_AEN);
		val |= ((pdata->alpha_mode << 1) & LCD_WINCTRL0_AEN);
		lcd->window[plane].winctrl0 = val;
	}

	/* Window control register 1 */
	if (pdata->flags & WIN_PRIORITY) {
		val = lcd->window[plane].winctrl1 & ~(LCD_WINCTRL1_PRI);
		val |= ((pdata->priority << 30) & LCD_WINCTRL1_PRI);
		lcd->window[plane].winctrl1 = val;
	}
	if (pdata->flags & WIN_CHANNEL) {
		val = lcd->window[plane].winctrl1 & ~(LCD_WINCTRL1_PIPE);
		val |= ((pdata->channel << 29) & LCD_WINCTRL1_PIPE);
		lcd->window[plane].winctrl1 = val;
	}
	if (pdata->flags & WIN_BUFFER_FORMAT) {
		val = lcd->window[plane].winctrl1 & ~(LCD_WINCTRL1_FRM);
		val |= ((pdata->buffer_format << 25) & LCD_WINCTRL1_FRM);
		lcd->window[plane].winctrl1 = val;
	}
	if (pdata->flags & WIN_COLOR_ORDER) {
		val = lcd->window[plane].winctrl1 & ~(LCD_WINCTRL1_CCO);
		val |= ((pdata->color_order << 24) & LCD_WINCTRL1_CCO);
		lcd->window[plane].winctrl1 = val;
	}
	if (pdata->flags & WIN_PIXEL_ORDER) {
		val = lcd->window[plane].winctrl1 & ~(LCD_WINCTRL1_PO);
		val |= ((pdata->pixel_order << 22) & LCD_WINCTRL1_PO);
		lcd->window[plane].winctrl1 = val;
	}
	if (pdata->flags & WIN_SIZE) {
		val = lcd->window[plane].winctrl1 & ~(LCD_WINCTRL1_SZX |
				LCD_WINCTRL1_SZY);
		val |= (((pdata->xsize << 11) - 1) & LCD_WINCTRL1_SZX);
		val |= (((pdata->ysize) - 1) & LCD_WINCTRL1_SZY);
		lcd->window[plane].winctrl1 = val;
		/* program buffer line width */
		bpp = winbpp(val) / 8;
		val = lcd->window[plane].winctrl2 & ~(LCD_WINCTRL2_BX);
		val |= (((pdata->xsize * bpp) << 8) & LCD_WINCTRL2_BX);
		lcd->window[plane].winctrl2 = val;
	}

	/* Window control register 2 */
	if (pdata->flags & WIN_COLORKEY_MODE) {
		val = lcd->window[plane].winctrl2 & ~(LCD_WINCTRL2_CKMODE);
		val |= ((pdata->colorkey_mode << 24) & LCD_WINCTRL2_CKMODE);
		lcd->window[plane].winctrl2 = val;
	}
	if (pdata->flags & WIN_DOUBLE_BUFFER_MODE) {
		val = lcd->window[plane].winctrl2 & ~(LCD_WINCTRL2_DBM);
		val |= ((pdata->double_buffer_mode << 23) & LCD_WINCTRL2_DBM);
		lcd->window[plane].winctrl2 = val;
	}
	if (pdata->flags & WIN_RAM_ARRAY_MODE) {
		val = lcd->window[plane].winctrl2 & ~(LCD_WINCTRL2_RAM);
		val |= ((pdata->ram_array_mode << 21) & LCD_WINCTRL2_RAM);
		lcd->window[plane].winctrl2 = val;
	}

	/* Buffer line width programmed with WIN_SIZE */

	if (pdata->flags & WIN_BUFFER_SCALE) {
		val = lcd->window[plane].winctrl2 & ~(LCD_WINCTRL2_SCX |
				LCD_WINCTRL2_SCY);
		val |= ((pdata->xsize << 11) & LCD_WINCTRL2_SCX);
		val |= ((pdata->ysize) & LCD_WINCTRL2_SCY);
		lcd->window[plane].winctrl2 = val;
	}

	if (pdata->flags & WIN_ENABLE) {
		val = lcd->winenable;
		val &= ~(1<<plane);
		val |= (pdata->enable & 1) << plane;
		lcd->winenable = val;
	}
	au_sync();
}

static void get_window(unsigned int plane,
	struct au1200_lcd_window_regs_t *pdata)
{
	/* Window control register 0 */
	pdata->xpos = (lcd->window[plane].winctrl0 & LCD_WINCTRL0_OX) >> 21;
	pdata->ypos = (lcd->window[plane].winctrl0 & LCD_WINCTRL0_OY) >> 10;
	pdata->alpha_color = (lcd->window[plane].winctrl0 & LCD_WINCTRL0_A) >> 2;
	pdata->alpha_mode = (lcd->window[plane].winctrl0 & LCD_WINCTRL0_AEN) >> 1;

	/* Window control register 1 */
	pdata->priority = (lcd->window[plane].winctrl1& LCD_WINCTRL1_PRI) >> 30;
	pdata->channel = (lcd->window[plane].winctrl1 & LCD_WINCTRL1_PIPE) >> 29;
	pdata->buffer_format = (lcd->window[plane].winctrl1 & LCD_WINCTRL1_FRM) >> 25;
	pdata->color_order = (lcd->window[plane].winctrl1 & LCD_WINCTRL1_CCO) >> 24;