path: root/drivers/video/fb-puv3.c

/*
 * Frame Buffer Driver for PKUnity-v3 Unigfx
 * Code specific to PKUnity SoC and UniCore ISA
 *
 *	Maintained by GUAN Xue-tao <gxt@mprc.pku.edu.cn>
 *	Copyright (C) 2001-2010 Guan Xuetao
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/platform_device.h>
#include <linux/clk.h>
#include <linux/fb.h>
#include <linux/init.h>
#include <linux/console.h>

#include <asm/sizes.h>
#include <mach/hardware.h>

/* Platform_data reserved for unifb registers. */
#define UNIFB_REGS_NUM		10
/* RAM reserved for the frame buffer. */
#define UNIFB_MEMSIZE		(SZ_4M)		/* 4 MB for 1024*768*32b */

/*
 * cause UNIGFX don not have EDID
 * all the modes are organized as follow
 */
static const struct fb_videomode unifb_modes[] = {
	/* 0 640x480-60 VESA */
	{ "640x480@60",  60,  640, 480,  25175000,  48, 16, 34, 10,  96, 1,
	  0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
	/* 1 640x480-75 VESA */
	{ "640x480@75",  75,  640, 480,  31500000, 120, 16, 18,  1,  64, 1,
	  0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
	/* 2 800x600-60 VESA */
	{ "800x600@60",  60,  800, 600,  40000000,  88, 40, 26,  1, 128, 1,
	  0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
	/* 3 800x600-75 VESA */
	{ "800x600@75",  75,  800, 600,  49500000, 160, 16, 23,  1,  80, 1,
	  0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
	/* 4 1024x768-60 VESA */
	{ "1024x768@60", 60, 1024, 768,  65000000, 160, 24, 34,  3, 136, 1,
	  0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
	/* 5 1024x768-75 VESA */
	{ "1024x768@75", 75, 1024, 768,  78750000, 176, 16, 30,  1,  96, 1,
	  0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
	/* 6 1280x960-60 VESA */
	{ "1280x960@60", 60, 1280, 960, 108000000, 312, 96, 38,  1, 112, 1,
	  0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
	/* 7 1440x900-60 VESA */
	{ "1440x900@60", 60, 1440, 900, 106500000, 232, 80, 30,  3, 152, 1,
	  0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
	/* 8 FIXME 9 1024x600-60 VESA UNTESTED */
	{ "1024x600@60", 60, 1024, 600,  50650000, 160, 24, 26,  1, 136, 1,
	  0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
	/* 9 FIXME 10 1024x600-75 VESA UNTESTED */
	{ "1024x600@75", 75, 1024, 600,  61500000, 176, 16, 23,  1,  96, 1,
	  0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
	/* 10 FIXME 11 1366x768-60 VESA UNTESTED */
	{ "1366x768@60", 60, 1366, 768,  85500000, 256, 58, 18,  1,  112, 3,
	  0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
};

static struct fb_var_screeninfo unifb_default = {
	.xres =		640,
	.yres =		480,
	.xres_virtual =	640,
	.yres_virtual =	480,
	.bits_per_pixel = 16,
	.red =		{ 11, 5, 0 },
	.green =	{ 5,  6, 0 },
	.blue =		{ 0,  5, 0 },
	.activate =	FB_ACTIVATE_NOW,
	.height =	-1,
	.width =	-1,
	.pixclock =	25175000,
	.left_margin =	48,
	.right_margin =	16,
	.upper_margin =	33,
	.lower_margin =	10,
	.hsync_len =	96,
	.vsync_len =	2,
	.vmode =	FB_VMODE_NONINTERLACED,
};

static struct fb_fix_screeninfo unifb_fix = {
	.id =		"UNIGFX FB",
	.type =		FB_TYPE_PACKED_PIXELS,
	.visual =	FB_VISUAL_TRUECOLOR,
	.xpanstep =	1,
	.ypanstep =	1,
	.ywrapstep =	1,
	.accel =	FB_ACCEL_NONE,
};

static void unifb_sync(struct fb_info *info)
{
	/* TODO: may, this can be replaced by interrupt */
	int cnt;

	for (cnt = 0; cnt < 0x10000000; cnt++) {
		if (readl(UGE_COMMAND) & 0x1000000)
			return;
	}

	if (cnt > 0x8000000)
		dev_warn(info->device, "Warning: UniGFX GE time out ...\n");
}

static void unifb_prim_fillrect(struct fb_info *info,
				const struct fb_fillrect *region)
{
	int awidth = region->width;
	int aheight = region->height;
	int m_iBpp = info->var.bits_per_pixel;
	int screen_width = info->var.xres;
	int src_sel = 1;	/* from fg_color */
	int pat_sel = 1;
	int src_x0 = 0;
	int dst_x0 = region->dx;