matroxfb_crtc2.c

linux-2.6.15.6

/*
 *
 * Hardware accelerated Matrox Millennium I, II, Mystique, G100, G200, G400 and G450.
 *
 * (c) 1998-2002 Petr Vandrovec <[e-mail]>
 *
 * Portions Copyright (c) 2001 Matrox Graphics Inc.
 *
 * Version: 1.65 2002/08/14
 *
 */

#include "matroxfb_maven.h"
#include "matroxfb_crtc2.h"
#include "matroxfb_misc.h"
#include "matroxfb_DAC1064.h"
#include <linux/matroxfb.h>
#include <asm/uaccess.h>

/* **************************************************** */

static int mem = 8192;

module_param(mem, int, 0);
MODULE_PARM_DESC(mem, "Memory size reserved for dualhead (default=8MB)");

/* **************************************************** */

static int matroxfb_dh_setcolreg(unsigned regno, unsigned red, unsigned green,
		unsigned blue, unsigned transp, struct fb_info* info) {
	u_int32_t col;
#define m2info (container_of(info, struct matroxfb_dh_fb_info, fbcon))

	if (regno >= 16)
		return 1;
	if (m2info->fbcon.var.grayscale) {
		/* gray = 0.30*R + 0.59*G + 0.11*B */
		red = green = blue = (red * 77 + green * 151 + blue * 28) >> 8;
	}
	red = CNVT_TOHW(red, m2info->fbcon.var.red.length);
	green = CNVT_TOHW(green, m2info->fbcon.var.green.length);
	blue = CNVT_TOHW(blue, m2info->fbcon.var.blue.length);
	transp = CNVT_TOHW(transp, m2info->fbcon.var.transp.length);

	col = (red << m2info->fbcon.var.red.offset)     |
	      (green << m2info->fbcon.var.green.offset) |
	      (blue << m2info->fbcon.var.blue.offset)   |
	      (transp << m2info->fbcon.var.transp.offset);

	switch (m2info->fbcon.var.bits_per_pixel) {
		case 16:
			m2info->cmap[regno] = col | (col << 16);
			break;
		case 32:
			m2info->cmap[regno] = col;
			break;
	}
	return 0;
#undef m2info
}

static void matroxfb_dh_restore(struct matroxfb_dh_fb_info* m2info,
		struct my_timming* mt,
		int mode,
		unsigned int pos) {
	u_int32_t tmp;
	u_int32_t datactl;
	MINFO_FROM(m2info->primary_dev);

	switch (mode) {
		case 15:
			tmp = 0x00200000;
			break;
		case 16:
			tmp = 0x00400000;
			break;
/*		case 32: */
		default:
			tmp = 0x00800000;
			break;
	}
	tmp |= 0x00000001;	/* enable CRTC2 */
	datactl = 0;
	if (ACCESS_FBINFO(outputs[1]).src == MATROXFB_SRC_CRTC2) {
		if (ACCESS_FBINFO(devflags.g450dac)) {
			tmp |= 0x00000006; /* source from secondary pixel PLL */
			/* no vidrst when in monitor mode */
			if (ACCESS_FBINFO(outputs[1]).mode != MATROXFB_OUTPUT_MODE_MONITOR) {
				tmp |=  0xC0001000; /* Enable H/V vidrst */
			}
		} else {
			tmp |= 0x00000002; /* source from VDOCLK */
			tmp |= 0xC0000000; /* enable vvidrst & hvidrst */
			/* MGA TVO is our clock source */
		}
	} else if (ACCESS_FBINFO(outputs[0]).src == MATROXFB_SRC_CRTC2) {
		tmp |= 0x00000004; /* source from pixclock */
		/* PIXPLL is our clock source */
	}
	if (ACCESS_FBINFO(outputs[0]).src == MATROXFB_SRC_CRTC2) {
		tmp |= 0x00100000;	/* connect CRTC2 to DAC */
	}
	if (mt->interlaced) {
		tmp |= 0x02000000;	/* interlaced, second field is bigger, as G450 apparently ignores it */
		mt->VDisplay >>= 1;
		mt->VSyncStart >>= 1;
		mt->VSyncEnd >>= 1;
		mt->VTotal >>= 1;
	}
	if ((mt->HTotal & 7) == 2) {
		datactl |= 0x00000010;
		mt->HTotal &= ~7;
	}
	tmp |= 0x10000000;	/* 0x10000000 is VIDRST polarity */
	mga_outl(0x3C14, ((mt->HDisplay - 8) << 16) | (mt->HTotal - 8));
	mga_outl(0x3C18, ((mt->HSyncEnd - 8) << 16) | (mt->HSyncStart - 8));
	mga_outl(0x3C1C, ((mt->VDisplay - 1) << 16) | (mt->VTotal - 1));
	mga_outl(0x3C20, ((mt->VSyncEnd - 1) << 16) | (mt->VSyncStart - 1));
	mga_outl(0x3C24, ((mt->VSyncStart) << 16) | (mt->HSyncStart));	/* preload */
	{
		u_int32_t linelen = m2info->fbcon.var.xres_virtual * (m2info->fbcon.var.bits_per_pixel >> 3);
		if (tmp & 0x02000000) {
			/* field #0 is smaller, so... */
			mga_outl(0x3C2C, pos);			/* field #1 vmemory start */
			mga_outl(0x3C28, pos + linelen);	/* field #0 vmemory start */
			linelen <<= 1;
			m2info->interlaced = 1;
		} else {
			mga_outl(0x3C28, pos);		/* vmemory start */
			m2info->interlaced = 0;
		}
		mga_outl(0x3C40, linelen);
	}
	mga_outl(0x3C4C, datactl);	/* data control */
	if (tmp & 0x02000000) {
		int i;

		mga_outl(0x3C10, tmp & ~0x02000000);
		for (i = 0; i < 2; i++) {
			unsigned int nl;
			unsigned int lastl = 0;

			while ((nl = mga_inl(0x3C48) & 0xFFF) >= lastl) {
				lastl = nl;
			}
		}
	}
	mga_outl(0x3C10, tmp);
	ACCESS_FBINFO(hw).crtc2.ctl = tmp;

	tmp = mt->VDisplay << 16;	/* line compare */
	if (mt->sync & FB_SYNC_HOR_HIGH_ACT)
		tmp |= 0x00000100;
	if (mt->sync & FB_SYNC_VERT_HIGH_ACT)
		tmp |= 0x00000200;
	mga_outl(0x3C44, tmp);
}

static void matroxfb_dh_disable(struct matroxfb_dh_fb_info* m2info) {
	MINFO_FROM(m2info->primary_dev);

	mga_outl(0x3C10, 0x00000004);	/* disable CRTC2, CRTC1->DAC1, PLL as clock source */
	ACCESS_FBINFO(hw).crtc2.ctl = 0x00000004;
}

static void matroxfb_dh_cfbX_init(struct matroxfb_dh_fb_info* m2info) {
	/* no acceleration for secondary head... */
	m2info->cmap[16] = 0xFFFFFFFF;
}

static void matroxfb_dh_pan_var(struct matroxfb_dh_fb_info* m2info,
		struct fb_var_screeninfo* var) {
	unsigned int pos;
	unsigned int linelen;
	unsigned int pixelsize;
	MINFO_FROM(m2info->primary_dev);

	m2info->fbcon.var.xoffset = var->xoffset;
	m2info->fbcon.var.yoffset = var->yoffset;
	pixelsize = m2info->fbcon.var.bits_per_pixel >> 3;
	linelen = m2info->fbcon.var.xres_virtual * pixelsize;
	pos = m2info->fbcon.var.yoffset * linelen + m2info->fbcon.var.xoffset * pixelsize;
	pos += m2info->video.offbase;
	if (m2info->interlaced) {
		mga_outl(0x3C2C, pos);
		mga_outl(0x3C28, pos + linelen);
	} else {
		mga_outl(0x3C28, pos);
	}
}

static int matroxfb_dh_decode_var(struct matroxfb_dh_fb_info* m2info,
		struct fb_var_screeninfo* var,
		int *visual,
		int *video_cmap_len,
		int *mode) {
	unsigned int mask;
	unsigned int memlen;
	unsigned int vramlen;

	switch (var->bits_per_pixel) {
		case 16:	mask = 0x1F;
				break;
		case 32:	mask = 0x0F;
				break;
		default:	return -EINVAL;
	}
	vramlen = m2info->video.len_usable;
	if (var->yres_virtual < var->yres)
		var->yres_virtual = var->yres;
	if (var->xres_virtual < var->xres)
		var->xres_virtual = var->xres;
	var->xres_virtual = (var->xres_virtual + mask) & ~mask;
	if (var->yres_virtual > 32767)
		return -EINVAL;
	memlen = var->xres_virtual * var->yres_virtual * (var->bits_per_pixel >> 3);
	if (memlen > vramlen)
		return -EINVAL;
	if (var->xoffset + var->xres > var->xres_virtual)
		var->xoffset = var->xres_virtual - var->xres;
	if (var->yoffset + var->yres > var->yres_virtual)
		var->yoffset = var->yres_virtual - var->yres;

	var->xres &= ~7;
	var->left_margin &= ~7;
	var->right_margin &= ~7;
	var->hsync_len &= ~7;

	*mode = var->bits_per_pixel;
	if (var->bits_per_pixel == 16) {
		if (var->green.length == 5) {
			var->red.offset = 10;
			var->red.length = 5;
			var->green.offset = 5;
			var->green.length = 5;
			var->blue.offset = 0;
			var->blue.length = 5;
			var->transp.offset = 15;
			var->transp.length = 1;
			*mode = 15;
		} else {
			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;
		}
	} else {
			var->red.offset = 16;
			var->red.length = 8;
			var->green.offset = 8;
			var->green.length = 8;
			var->blue.offset = 0;
			var->blue.length = 8;
			var->transp.offset = 24;
			var->transp.length = 8;
	}
	*visual = FB_VISUAL_TRUECOLOR;
	*video_cmap_len = 16;
	return 0;
}

static int matroxfb_dh_open(struct fb_info* info, int user) {
#define m2info (container_of(info, struct matroxfb_dh_fb_info, fbcon))
	MINFO_FROM(m2info->primary_dev);

	if (MINFO) {
		int err;

		if (ACCESS_FBINFO(dead)) {
			return -ENXIO;
		}
		err = ACCESS_FBINFO(fbops).fb_open(&ACCESS_FBINFO(fbcon), user);
		if (err) {
			return err;
		}
	}
	return 0;
#undef m2info
}

static int matroxfb_dh_release(struct fb_info* info, int user) {
#define m2info (container_of(info, struct matroxfb_dh_fb_info, fbcon))
	int err = 0;
	MINFO_FROM(m2info->primary_dev);

	if (MINFO) {
		err = ACCESS_FBINFO(fbops).fb_release(&ACCESS_FBINFO(fbcon), user);
	}
	return err;
#undef m2info
}

static void matroxfb_dh_init_fix(struct matroxfb_dh_fb_info *m2info) {
	struct fb_fix_screeninfo *fix = &m2info->fbcon.fix;

	strcpy(fix->id, "MATROX DH");

	fix->smem_start = m2info->video.base;
	fix->smem_len = m2info->video.len_usable;
	fix->ypanstep = 1;
	fix->ywrapstep = 0;
	fix->xpanstep = 8;	/* TBD */
	fix->mmio_start = m2info->mmio.base;
	fix->mmio_len = m2info->mmio.len;
	fix->accel = 0;		/* no accel... */
}

static int matroxfb_dh_check_var(struct fb_var_screeninfo* var, struct fb_info* info) {
#define m2info (container_of(info, struct matroxfb_dh_fb_info, fbcon))
	int visual;
	int cmap_len;
	int mode;

	return matroxfb_dh_decode_var(m2info, var, &visual, &cmap_len, &mode);
#undef m2info
}

static int matroxfb_dh_set_par(struct fb_info* info) {
#define m2info (container_of(info, struct matroxfb_dh_fb_info, fbcon))
	int visual;
	int cmap_len;
	int mode;
	int err;
	struct fb_var_screeninfo* var = &info->var;
	MINFO_FROM(m2info->primary_dev);

	if ((err = matroxfb_dh_decode_var(m2info, var, &visual, &cmap_len, &mode)) != 0)
		return err;
	/* cmap */
	{
		m2info->fbcon.screen_base = vaddr_va(m2info->video.vbase);
		m2info->fbcon.fix.visual = visual;
		m2info->fbcon.fix.type = FB_TYPE_PACKED_PIXELS;
		m2info->fbcon.fix.type_aux = 0;
		m2info->fbcon.fix.line_length = (var->xres_virtual * var->bits_per_pixel) >> 3;
	}
	{
		struct my_timming mt;
		unsigned int pos;
		int out;
		int cnt;

		matroxfb_var2my(&m2info->fbcon.var, &mt);
		mt.crtc = MATROXFB_SRC_CRTC2;
		/* CRTC2 delay */
		mt.delay = 34;

		pos = (m2info->fbcon.var.yoffset * m2info->fbcon.var.xres_virtual + m2info->fbcon.var.xoffset) * m2info->fbcon.var.bits_per_pixel >> 3;
		pos += m2info->video.offbase;
		cnt = 0;
		down_read(&ACCESS_FBINFO(altout).lock);
		for (out = 0; out < MATROXFB_MAX_OUTPUTS; out++) {
			if (ACCESS_FBINFO(outputs[out]).src == MATROXFB_SRC_CRTC2) {
				cnt++;
				if (ACCESS_FBINFO(outputs[out]).output->compute) {
					ACCESS_FBINFO(outputs[out]).output->compute(ACCESS_FBINFO(outputs[out]).data, &mt);
				}
			}
		}
		ACCESS_FBINFO(crtc2).pixclock = mt.pixclock;
		ACCESS_FBINFO(crtc2).mnp = mt.mnp;
		up_read(&ACCESS_FBINFO(altout).lock);
		if (cnt) {
			matroxfb_dh_restore(m2info, &mt, mode, pos);
		} else {
			matroxfb_dh_disable(m2info);
		}