matroxfb_maven.c

linux-2.4.29操作系统的源码

		0x10,	/* 29 */
		0xFF, 0x03, /* 2A-2B */
		0x24,	/* 2C */
		0x0F, 0x78, /* 2D-2E */
		0x00, 0x00, /* 2F-30 */
		0xB2, 0x04, /* 31-32 */
		0x14,	/* 33 */
		0x02,	/* 34 */
		0x00,	/* 35 written multiple times */
		0x00,	/* 36 not written */
		0xA3,	/* 37 */
		0xC8,	/* 38 */
		0x15,	/* 39 */
		0x05,	/* 3A */
		0x3B,	/* 3B */
		0x3C, 0x00, /* 3C-3D */
		0x00,	/* 3E written multiple times */
		0x00,	/* never written */
	}, MODE_NTSC, 525, 60 };
	MINFO_FROM(md->primary_head);

	if (ACCESS_FBINFO(outputs[1].mode) == MODE_PAL)
		*data = palregs;
  	else
  		*data = ntscregs;
  
 	/* Set deflicker */
 	data->regs[0x93] = maven_compute_deflicker(md);
 
 	/* set gamma */
 	{
		const struct maven_gamma* g;
		g = maven_compute_gamma(md);
		data->regs[0x83] = g->reg83;
		data->regs[0x84] = g->reg84;
		data->regs[0x85] = g->reg85;
		data->regs[0x86] = g->reg86;
		data->regs[0x87] = g->reg87;
		data->regs[0x88] = g->reg88;
		data->regs[0x89] = g->reg89;
		data->regs[0x8A] = g->reg8a;
		data->regs[0x8B] = g->reg8b;
 	}
 
 	/* Set contrast / brightness */
 	{
		int bl, wl;
		maven_compute_bwlevel (md, &bl, &wl);
		data->regs[0x0e] = bl >> 2;
		data->regs[0x0f] = bl & 3;
		data->regs[0x1e] = wl >> 2;
		data->regs[0x1f] = wl & 3;
 	}

 	/* Set saturation */
 	{
		data->regs[0x20] =
		data->regs[0x22] = ACCESS_FBINFO(altout.tvo_params.saturation);
 	}
 
 	/* Set HUE */
	data->regs[0x25] = ACCESS_FBINFO(altout.tvo_params.hue);
 	return;
}

#define LR(x) maven_set_reg(c, (x), m->regs[(x)])
#define LRP(x) maven_set_reg_pair(c, (x), m->regs[(x)] | (m->regs[(x)+1] << 8))
static void maven_init_TV(struct i2c_client* c, const struct mavenregs* m) {
	int val;


	maven_set_reg(c, 0x3E, 0x01);
	maven_get_reg(c, 0x82);	/* fetch oscillator state? */
	maven_set_reg(c, 0x8C, 0x00);
	maven_get_reg(c, 0x94);	/* get 0x82 */
	maven_set_reg(c, 0x94, 0xA2);
	/* xmiscctrl */

	maven_set_reg_pair(c, 0x8E, 0x1EFF);
	maven_set_reg(c, 0xC6, 0x01);

	/* removed code... */

	maven_get_reg(c, 0x06);
	maven_set_reg(c, 0x06, 0xF9);	/* or read |= 0xF0 ? */

	/* removed code here... */

	/* real code begins here? */
	/* chroma subcarrier */
	LR(0x00); LR(0x01); LR(0x02); LR(0x03);

	LR(0x04);

	LR(0x2C);
	LR(0x08);
	LR(0x0A);
	LR(0x09);
	LR(0x29);
	LRP(0x31);
	LRP(0x17);
	LR(0x0B);
	LR(0x0C);
	if (m->mode == MODE_PAL) {
		maven_set_reg(c, 0x35, 0x10); /* ... */
	} else {
		maven_set_reg(c, 0x35, 0x0F); /* ... */
	}

	LRP(0x10);

	LRP(0x0E);
	LRP(0x1E);

	LR(0x20);	/* saturation #1 */
	LR(0x22);	/* saturation #2 */
	LR(0x25);	/* hue */
	LR(0x34);
	LR(0x33);
	LR(0x19);
	LR(0x12);
	LR(0x3B);
	LR(0x13);
	LR(0x39);
	LR(0x1D);
	LR(0x3A);
	LR(0x24);
	LR(0x14);
	LR(0x15);
	LR(0x16);
	LRP(0x2D);
	LRP(0x2F);
	LR(0x1A);
	LR(0x1B);
	LR(0x1C);
	LR(0x23);
	LR(0x26);
	LR(0x28);
	LR(0x27);
	LR(0x21);
	LRP(0x2A);
	if (m->mode == MODE_PAL)
		maven_set_reg(c, 0x35, 0x1D);	/* ... */
	else
		maven_set_reg(c, 0x35, 0x1C);

	LRP(0x3C);
	LR(0x37);
	LR(0x38);
	maven_set_reg(c, 0xB3, 0x01);

	maven_get_reg(c, 0xB0);	/* read 0x80 */
	maven_set_reg(c, 0xB0, 0x08);	/* ugh... */
	maven_get_reg(c, 0xB9);	/* read 0x7C */
	maven_set_reg(c, 0xB9, 0x78);
	maven_get_reg(c, 0xBF);	/* read 0x00 */
	maven_set_reg(c, 0xBF, 0x02);
	maven_get_reg(c, 0x94);	/* read 0x82 */
	maven_set_reg(c, 0x94, 0xB3);

	LR(0x80); /* 04 1A 91 or 05 21 91 */
	LR(0x81);
	LR(0x82);

	maven_set_reg(c, 0x8C, 0x20);
	maven_get_reg(c, 0x8D);
	maven_set_reg(c, 0x8D, 0x10);

	LR(0x90); /* 4D 50 52 or 4E 05 45 */
	LR(0x91);
	LR(0x92);

	LRP(0x9A); /* 0049 or 004F */
	LRP(0x9C); /* 0004 or 0004 */
	LRP(0x9E); /* 0458 or 045E */
	LRP(0xA0); /* 05DA or 051B */
	LRP(0xA2); /* 00CC or 00CF */
	LRP(0xA4); /* 007D or 007F */
	LRP(0xA6); /* 007C or 007E */
	LRP(0xA8); /* 03CB or 03CE */
	LRP(0x98); /* 0000 or 0000 */
	LRP(0xAE); /* 0044 or 003A */
	LRP(0x96); /* 05DA or 051B */
	LRP(0xAA); /* 04BC or 046A */
	LRP(0xAC); /* 004D or 004E */

	LR(0xBE);
	LR(0xC2);

	maven_get_reg(c, 0x8D);
	maven_set_reg(c, 0x8D, 0x04);

	LR(0x20);	/* saturation #1 */
	LR(0x22);	/* saturation #2 */
	LR(0x93);	/* whoops */
	LR(0x20);	/* oh, saturation #1 again */
	LR(0x22);	/* oh, saturation #2 again */
	LR(0x25);	/* hue */
	LRP(0x0E);
	LRP(0x1E);
	LRP(0x0E);	/* problems with memory? */
	LRP(0x1E);	/* yes, matrox must have problems in memory area... */

	/* load gamma correction stuff */
	LR(0x83);
	LR(0x84);
	LR(0x85);
	LR(0x86);
	LR(0x87);
	LR(0x88);
	LR(0x89);
	LR(0x8A);
	LR(0x8B);

	val = maven_get_reg(c, 0x8D);
	val &= 0x14;			/* 0x10 or anything ored with it */
	maven_set_reg(c, 0x8D, val);

	LR(0x33);
	LR(0x19);
	LR(0x12);
	LR(0x3B);
	LR(0x13);
	LR(0x39);
	LR(0x1D);
	LR(0x3A);
	LR(0x24);
	LR(0x14);
	LR(0x15);
	LR(0x16);
	LRP(0x2D);
	LRP(0x2F);
	LR(0x1A);
	LR(0x1B);
	LR(0x1C);
	LR(0x23);
	LR(0x26);
	LR(0x28);
	LR(0x27);
	LR(0x21);
	LRP(0x2A);
	if (m->mode == MODE_PAL)
		maven_set_reg(c, 0x35, 0x1D);
	else
		maven_set_reg(c, 0x35, 0x1C);
	LRP(0x3C);
	LR(0x37);
	LR(0x38);

	maven_get_reg(c, 0xB0);
	LR(0xB0);	/* output mode */
	LR(0x90);
	LR(0xBE);
	LR(0xC2);

	LRP(0x9A);
	LRP(0xA2);
	LRP(0x9E);
	LRP(0xA6);
	LRP(0xAA);
	LRP(0xAC);
	maven_set_reg(c, 0x3E, 0x00);
	maven_set_reg(c, 0x95, 0x20);
}

static int maven_find_exact_clocks(unsigned int ht, unsigned int vt,
		struct mavenregs* m) {
	unsigned int x;
	unsigned int err = ~0;

	/* 1:1 */
	m->regs[0x80] = 0x0F;
	m->regs[0x81] = 0x07;
	m->regs[0x82] = 0x81;

	for (x = 0; x < 8; x++) {
		unsigned int a, b, c, h2;
		unsigned int h = ht + 2 + x;

		if (!matroxfb_mavenclock((m->mode == MODE_PAL) ? &maven_PAL : &maven_NTSC, h, vt, &a, &b, &c, &h2)) {
			unsigned int diff = h - h2;

			if (diff < err) {
				err = diff;
				m->regs[0x80] = a - 1;
				m->regs[0x81] = b - 1;
				m->regs[0x82] = c | 0x80;
				m->hcorr = h2 - 2;
				m->htotal = h - 2;
			}
		}
	}
	return err != ~0U;
}

static inline int maven_compute_timming(struct maven_data* md,
		struct my_timming* mt,
		struct mavenregs* m) {
	unsigned int tmpi;
	unsigned int a, bv, c;

	m->mode = md->primary_head->outputs[1].mode;
	if (MODE_TV(m->mode)) {
		unsigned int lmargin;
		unsigned int umargin;
		unsigned int vslen;
		unsigned int hcrt;
		unsigned int slen;

		maven_init_TVdata(md, m);

		if (maven_find_exact_clocks(mt->HTotal, mt->VTotal, m) == 0)
			return -EINVAL;

		lmargin = mt->HTotal - mt->HSyncEnd;
		slen = mt->HSyncEnd - mt->HSyncStart;
		hcrt = mt->HTotal - slen - mt->delay;
		umargin = mt->VTotal - mt->VSyncEnd;
		vslen = mt->VSyncEnd - mt->VSyncStart;

		if (m->hcorr < mt->HTotal)
			hcrt += m->hcorr;
		if (hcrt > mt->HTotal)
			hcrt -= mt->HTotal;
		if (hcrt + 2 > mt->HTotal)
			hcrt = 0;	/* or issue warning? */

		/* last (first? middle?) line in picture can have different length */
		/* hlen - 2 */
		m->regs[0x96] = m->hcorr;
		m->regs[0x97] = m->hcorr >> 8;
		/* ... */
		m->regs[0x98] = 0x00; m->regs[0x99] = 0x00;
		/* hblanking end */
		m->regs[0x9A] = lmargin;	/* 100% */
		m->regs[0x9B] = lmargin >> 8;	/* 100% */
		/* who knows */
		m->regs[0x9C] = 0x04;
		m->regs[0x9D] = 0x00;
		/* htotal - 2 */
		m->regs[0xA0] = m->htotal;
		m->regs[0xA1] = m->htotal >> 8;
		/* vblanking end */
		m->regs[0xA2] = mt->VTotal - mt->VSyncStart - 1;	/* stop vblanking */
		m->regs[0xA3] = (mt->VTotal - mt->VSyncStart - 1) >> 8;
		/* something end... [A6]+1..[A8] */
		if (md->version == MGATVO_B) {
			m->regs[0xA4] = 0x04;
			m->regs[0xA5] = 0x00;
		} else {
			m->regs[0xA4] = 0x01;
			m->regs[0xA5] = 0x00;
		}
		/* something start... 0..[A4]-1 */
		m->regs[0xA6] = 0x00;
		m->regs[0xA7] = 0x00;
		/* vertical line count - 1 */
		m->regs[0xA8] = mt->VTotal - 1;
		m->regs[0xA9] = (mt->VTotal - 1) >> 8;
		/* horizontal vidrst pos */
		m->regs[0xAA] = hcrt;		/* 0 <= hcrt <= htotal - 2 */
		m->regs[0xAB] = hcrt >> 8;
		/* vertical vidrst pos */
		m->regs[0xAC] = mt->VTotal - 2;
		m->regs[0xAD] = (mt->VTotal - 2) >> 8;
		/* moves picture up/down and so on... */
		m->regs[0xAE] = 0x01; /* Fix this... 0..VTotal */
		m->regs[0xAF] = 0x00;
		{
			int hdec;
			int hlen;
			unsigned int ibmin = 4 + lmargin + mt->HDisplay;
			unsigned int ib;
			int i;

			/* Verify! */
			/* Where 94208 came from? */
			if (mt->HTotal)
				hdec = 94208 / (mt->HTotal);
			else
				hdec = 0x81;
			if (hdec > 0x81)
				hdec = 0x81;
			if (hdec < 0x41)
				hdec = 0x41;
			hdec--;
			hlen = 98304 - 128 - ((lmargin + mt->HDisplay - 8) * hdec);
			if (hlen < 0)
				hlen = 0;
			hlen = hlen >> 8;
			if (hlen > 0xFF)
				hlen = 0xFF;
			/* Now we have to compute input buffer length.
			   If you want any picture, it must be between
			     4 + lmargin + xres
			   and
			     94208 / hdec
			   If you want perfect picture even on the top
			   of screen, it must be also
			     0x3C0000 * i / hdec + Q - R / hdec
			   where
			        R      Qmin   Qmax
			     0x07000   0x5AE  0x5BF
			     0x08000   0x5CF  0x5FF
			     0x0C000   0x653  0x67F
			     0x10000   0x6F8  0x6FF
			 */
			i = 1;
			do {
				ib = ((0x3C0000 * i - 0x8000)/ hdec + 0x05E7) >> 8;
				i++;
			} while (ib < ibmin);
			if (ib >= m->htotal + 2) {
				ib = ibmin;
			}

			m->regs[0x90] = hdec;	/* < 0x40 || > 0x80 is bad... 0x80 is questionable */
			m->regs[0xC2] = hlen;
			/* 'valid' input line length */
			m->regs[0x9E] = ib;
			m->regs[0x9F] = ib >> 8;
		}
		{
			int vdec;
			int vlen;

#define MATROX_USE64BIT_DIVIDE
			if (mt->VTotal) {
#ifdef MATROX_USE64BIT_DIVIDE
				u64 f1;
				u32 a;
				u32 b;

				a = m->vlines * (m->htotal + 2);
				b = (mt->VTotal - 1) * (m->htotal + 2) + m->hcorr + 2;

				f1 = ((u64)a) << 15;	/* *32768 */
				do_div(f1, b);
				vdec = f1;
#else
				vdec = m->vlines * 32768 / mt->VTotal;
#endif
			} else
				vdec = 0x8000;
			if (vdec > 0x8000)
				vdec = 0x8000;
			vlen = (vslen + umargin + mt->VDisplay) * vdec;
			vlen = (vlen >> 16) - 146; /* FIXME: 146?! */
			if (vlen < 0)
				vlen = 0;
			if (vlen > 0xFF)
				vlen = 0xFF;
			vdec--;