matroxfb_maven.c

LINUX 2.6.17.4的源码

	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 == MATROXFB_OUTPUT_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 == MATROXFB_OUTPUT_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;
	MINFO_FROM(md->primary_head);

	m->mode = ACCESS_FBINFO(outputs[1]).mode;
	if (m->mode != MATROXFB_OUTPUT_MODE_MONITOR) {
		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--;
			m->regs[0x91] = vdec;
			m->regs[0x92] = vdec >> 8;
			m->regs[0xBE] = vlen;
		}
		m->regs[0xB0] = 0x08;	/* output: SVideo/Composite */
		return 0;
	}

	DAC1064_calcclock(mt->pixclock, 450000, &a, &bv, &c);
	m->regs[0x80] = a;
	m->regs[0x81] = bv;
	m->regs[0x82] = c | 0x80;

	m->regs[0xB3] = 0x01;
	m->regs[0x94] = 0xB2;

	/* htotal... */
	m->regs[0x96] = mt->HTotal;
	m->regs[0x97] = mt->HTotal >> 8;
	/* ?? */
	m->regs[0x98] = 0x00;
	m->regs[0x99] = 0x00;
	/* hsync len */
	tmpi = mt->HSyncEnd - mt->HSyncStart;
	m->regs[0x9A] = tmpi;
	m->regs[0x9B] = tmpi >> 8;
	/* hblank end */
	tmpi = mt->HTotal - mt->HSyncStart;
	m->regs[0x9C] = tmpi;
	m->regs[0x9D] = tmpi >> 8;
	/* hblank start */
	tmpi += mt->HDisplay;
	m->regs[0x9E] = tmpi;
	m->regs[0x9F] = tmpi >> 8;
	/* htotal + 1 */
	tmpi = mt->HTotal + 1;
	m->regs[0xA0] = tmpi;
	m->regs[0xA1] = tmpi >> 8;
	/* vsync?! */
	tmpi = mt->VSyncEnd - mt->VSyncStart - 1;
	m->regs[0xA2] = tmpi;
	m->regs[0xA3] = tmpi >> 8;
	/* ignored? */
	tmpi = mt->VTotal - mt->VSyncStart;
	m->regs[0xA4] = tmpi;
	m->regs[0xA5] = tmpi >> 8;
	/* ignored? */
	tmpi = mt->VTotal - 1;
	m->regs[0xA6] = tmpi;
	m->regs[0xA7] = tmpi >> 8;
	/* vtotal - 1 */
	m->regs[0xA8] = tmpi;
	m->regs[0xA9] = tmpi >> 8;
	/* hor vidrst */
	tmpi = mt->HTotal - mt->delay;
	m->regs[0xAA] = tmpi;
	m->regs[0xAB] = tmpi >> 8;
	/* vert vidrst */
	tmpi = mt->VTotal - 2;
	m->regs[0xAC] = tmpi;
	m->regs[0xAD] = tmpi >> 8;
	/* ignored? */
	m->regs[0xAE] = 0x00;
	m->regs[0xAF] = 0x00;

	m->regs[0xB0] = 0x03;	/* output: monitor */
	m->regs[0xB1] = 0xA0;	/* ??? */
	m->regs[0x8C] = 0x20;	/* must be set... */
	m->regs[0x8D] = 0x04;	/* defaults to 0x10: test signal */
	m->regs[0xB9] = 0x1A;	/* defaults to 0x2C: too bright */
	m->regs[0xBF] = 0x22;	/* makes picture stable */

	return 0;
}

static int maven_program_timming(struct maven_data* md,
		const struct mavenregs* m) {
	struct i2c_client* c = &md->client;

	if (m->mode == MATROXFB_OUTPUT_MODE_MONITOR) {
		LR(0x80);
		LR(0x81);
		LR(0x82);

		LR(0xB3);
		LR(0x94);

		LRP(0x96);
		LRP(0x98);
		LRP(0x9A);
		LRP(0x9C);
		LRP(0x9E);
		LRP(0xA0);
		LRP(0xA2);
		LRP(0xA4);
		LRP(0xA6);
		LRP(0xA8);
		LRP(0xAA);
		LRP(0xAC);
		LRP(0xAE);

		LR(0xB0);	/* output: monitor */
		LR(0xB1);	/* ??? */
		LR(0x8C);	/* must be set... */
		LR(0x8D);	/* defaults to 0x10: test signal */
		LR(0xB9);	/* defaults to 0x2C: too bright */
		LR(0xBF);	/* makes picture stable */
	} else {
		maven_init_TV(c, m);
	}
	return 0;
}

static inline int maven_resync(struct maven_data* md) {
	struct i2c_client* c = &md->client;
	maven_set_reg(c, 0x95, 0x20);	/* start whole thing */
	return 0;
}

static int maven_get_queryctrl (struct maven_data* md, 
				struct v4l2_queryctrl *p) {
	int i;
	
	i = get_ctrl_id(p->id);
	if (i >= 0) {
		*p = maven_controls[i].desc;
		return 0;
	}
	if (i == -ENOENT) {
		static const struct v4l2_queryctrl disctrl = 
			{ .flags = V4L2_CTRL_FLAG_DISABLED };
			
		i = p->id;
		*p = disctrl;
		p->id = i;
		sprintf(p->name, "Ctrl #%08X", i);
		return 0;
	}
	return -EINVAL;
}

static int maven_set_control (struct maven_data* md, 
			      struct v4l2_control *p) {
	int i;
	
	i = get_ctrl_id(p->id);
	if (i < 0) return -EINVAL;

	/*
	 * Check if changed.
	 */
	if (p->value == *get_ctrl_ptr(md, i)) return 0;

	/*
	 * Check limits.
	 */
	if (p->value > maven_controls[i].desc.maximum) return -EINVAL;
	if (p->value < maven_controls[i].desc.minimum) return -EINVAL;

	/*
	 * Store new value.
	 */
	*get_ctrl_ptr(md, i) = p->value;

	switch (p->id) {
		case V4L2_CID_BRIGHTNESS:
		case V4L2_CID_CONTRAST:
		{
		  int blacklevel, whitelevel;
		  maven_compute_bwlevel(md, &blacklevel, &whitelevel);
		  blacklevel = (blacklevel >> 2) | ((blacklevel & 3) << 8);
		  whitelevel = (whitelevel >> 2) | ((whitelevel & 3) << 8);
		  maven_set_reg_pair(&md->client, 0x0e, blacklevel);
		  maven_set_reg_pair(&md->client, 0x1e, whitelevel);
		}
		break;
		case V4L2_CID_SATURATION:
		{
		  maven_set_reg(&md->client, 0x20, p->value);
		  maven_set_reg(&md->client, 0x22, p->value);
		}
		break;
		case V4L2_CID_HUE:
		{
		  maven_set_reg(&md->client, 0x25, p->value);
		}
		break;
		case V4L2_CID_GAMMA:
		{
		  const struct maven_gamma* g;
		  g = maven_compute_gamma(md);
		  maven_set_reg(&md->client, 0x83, g->reg83);
		  maven_set_reg(&md->client, 0x84, g->reg84);
		  maven_set_reg(&md->client, 0x85, g->reg85);
		  maven_set_reg(&md->client, 0x86, g->reg86);
		  maven_set_reg(&md->client, 0x87, g->reg87);
		  maven_set_reg(&md->client, 0x88, g->reg88);
		  maven_set_reg(&md->client, 0x89, g->reg89);
		  maven_set_reg(&md->client, 0x8a, g->reg8a);
		  maven_set_reg(&md->client, 0x8b, g->reg8b);
		}
		break;
		case MATROXFB_CID_TESTOUT:
		{
			unsigned char val 
			  = maven_get_reg(&md->client,0x8d);
			if (p->value) val |= 0x10;
			else          val &= ~0x10;
			maven_set_reg(&md->client, 0x8d, val);
		}
		break;
		case MATROXFB_CID_DEFLICKER:
		{
		  maven_set_reg(&md->client, 0x93, maven_compute_deflicker(md));
		}
		break;
	}
	

	return 0;
}

static int maven_get_control (struct maven_data* md, 
			      struct v4l2_control *p) {
	int i;
	
	i = get_ctrl_id(p->id);
	if (i < 0) return -EINVAL;
	p->value = *get_ctrl_ptr(md, i);
	return 0;
}

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

static int maven_out_compute(void* md, struct my_timming* mt) {
#define mdinfo ((struct maven_data*)md)
#define minfo (mdinfo->primary_head)
	return maven_compute_timming(md, mt, &ACCESS_FBINFO(hw).maven);
#undef minfo
#undef mdinfo
}

static int maven_out_program(void* md) {
#define mdinfo ((struct maven_data*)md)
#define minfo (mdinfo->primary_head)
	return maven_program_timming(md, &ACCESS_FBINFO(hw).maven);
#undef minfo
#undef mdinfo
}

static int maven_out_start(void* md) {
	return maven_resync(md);
}

static int maven_out_verify_mode(void* md, u_int32_t arg) {
	switch (arg) {
		case MATROXFB_OUTPUT_MODE_PAL:
		case MATROXFB_OUTPUT_MODE_NTSC:
		case MATROXFB_OUTPUT_MODE_MONITOR:
			return 0;
	}
	return -EINVAL;
}

static int maven_out_get_queryctrl(void* md, struct v4l2_queryctrl* p) {
        return maven_get_queryctrl(md, p);
}

static int maven_out_get_ctrl(void* md, struct v4l2_control* p) {
	return maven_get_control(md, p);
}

static int maven_out_set_ctrl(void* md, struct v4l2_control* p) {
	return maven_set_control(md, p);
}

static struct matrox_altout maven_altout = {
	.name		= "Secondary output",
	.compute	= maven_out_compute,
	.program	= maven_out_program,
	.start		= maven_out_start,
	.verifymode	= maven_out_verify_mode,
	.getqueryctrl	= maven_out_get_queryctrl,
	.getctrl	= maven_out_get_ctrl,
	.setctrl	= maven_out_set_ctrl,
};

static int maven_init_client(struct i2c_client* clnt) {
	struct maven_data* md = i2c_get_clientdata(clnt);
	MINFO_FROM(container_of(clnt->adapter, struct i2c_bit_adapter, adapter)->minfo);

	md->primary_head = MINFO;
	down_write(&ACCESS_FBINFO(altout.lock));
	ACCESS_FBINFO(outputs[1]).output = &maven_altout;
	ACCESS_FBINFO(outputs[1]).src = ACCESS_FBINFO(outputs[1]).default_src;
	ACCESS_FBINFO(outputs[1]).data = md;
	ACCESS_FBINFO(outputs[1]).mode = MATROXFB_OUTPUT_MODE_MONITOR;
	up_write(&ACCESS_FBINFO(altout.lock));
	if (maven_get_reg(clnt, 0xB2) < 0x14) {
		md->version = MGATVO_B;
		/* Tweak some things for this old chip */
	} else {
		md->version = MGATVO_C;
	}
	/*
	 * Set all parameters to its initial values.
	 */
	{
		unsigned int i;

		for (i = 0; i < MAVCTRLS; ++i) {
			*get_ctrl_ptr(md, i) = maven_controls[i].desc.default_value;
		}
	}

	return 0;
}

static int maven_shutdown_client(struct i2c_client* clnt) {
	struct maven_data* md = i2c_get_clientdata(clnt);

	if (md->primary_head) {
		MINFO_FROM(md->primary_head);

		down_write(&ACCESS_FBINFO(altout.lock));
		ACCESS_FBINFO(outputs[1]).src = MATROXFB_SRC_NONE;
		ACCESS_FBINFO(outputs[1]).output = NULL;
		ACCESS_FBINFO(outputs[1]).data = NULL;
		ACCESS_FBINFO(outputs[1]).mode = MATROXFB_OUTPUT_MODE_MONITOR;
		up_write(&ACCESS_FBINFO(altout.lock));
		md->primary_head = NULL;
	}
	return 0;
}

static unsigned short normal_i2c[] = { MAVEN_I2CID, I2C_CLIENT_END };
I2C_CLIENT_INSMOD;

static struct i2c_driver maven_driver;

static int maven_detect_client(struct i2c_adapter* adapter, int address, int kind) {
	int err = 0;
	struct i2c_client* new_client;
	struct maven_data* data;

	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WRITE_WORD_DATA |
					      I2C_FUNC_SMBUS_BYTE_DATA |
					      I2C_FUNC_PROTOCOL_MANGLING))
		goto ERROR0;
	if (!(data = kzalloc(sizeof(*data), GFP_KERNEL))) {
		err = -ENOMEM;
		goto ERROR0;
	}
	new_client = &data->client;
	i2c_set_clientdata(new_client, data);
	new_client->addr = address;
	new_client->adapter = adapter;
	new_client->driver = &maven_driver;
	new_client->flags = 0;
	strlcpy(new_client->name, "maven", I2C_NAME_SIZE);
	if ((err = i2c_attach_client(new_client)))
		goto ERROR3;
	err = maven_init_client(new_client);
	if (err)
		goto ERROR4;
	return 0;
ERROR4:;
	i2c_detach_client(new_client);
ERROR3:;
	kfree(new_client);
ERROR0:;
	return err;
}

static int maven_attach_adapter(struct i2c_adapter* adapter) {
	if (adapter->id == I2C_HW_B_G400)
		return i2c_probe(adapter, &addr_data, &maven_detect_client);
	return 0;
}

static int maven_detach_client(struct i2c_client* client) {
	int err;

	if ((err = i2c_detach_client(client)))
		return err;
	maven_shutdown_client(client);
	kfree(i2c_get_clientdata(client));
	return 0;
}

static struct i2c_driver maven_driver={
	.driver = {
		.name	= "maven",
	},
	.id		= I2C_DRIVERID_MGATVO,
	.attach_adapter	= maven_attach_adapter,
	.detach_client	= maven_detach_client,
};

static int __init matroxfb_maven_init(void)
{
	return i2c_add_driver(&maven_driver);
}

static void __exit matroxfb_maven_exit(void)
{
	i2c_del_driver(&maven_driver);
}

MODULE_AUTHOR("(c) 1999-2002 Petr Vandrovec <[e-mail]>");
MODULE_DESCRIPTION("Matrox G200/G400 Matrox MGA-TVO driver");
MODULE_LICENSE("GPL");
module_init(matroxfb_maven_init);
module_exit(matroxfb_maven_exit);
/* we do not have __setup() yet */