matroxfb_maven.c

自己根据lkd和情境分析

/*
 *
 * Hardware accelerated Matrox Millennium I, II, Mystique, G100, G200, G400 and G450.
 *
 * (c) 1998-2001 Petr Vandrovec <[e-mail]>
 *
 * Version: 1.51 2001/01/19
 *
 * See matroxfb_base.c for contributors.
 *
 */

#include "matroxfb_maven.h"
#include "matroxfb_misc.h"
#include "matroxfb_DAC1064.h"
#include <linux/i2c.h>
#include <linux/matroxfb.h>
#include <asm/div64.h>
#include <asm/uaccess.h>

#define MAVEN_I2CID	(0x1B)

#define MODE_PAL	MATROXFB_OUTPUT_MODE_PAL
#define MODE_NTSC	MATROXFB_OUTPUT_MODE_NTSC
#define MODE_TV(x)	(((x) == MODE_PAL) || ((x) == MODE_NTSC))
#define MODE_MONITOR	MATROXFB_OUTPUT_MODE_MONITOR

struct maven_data {
	struct matrox_fb_info*		primary_head;
	struct i2c_client*		client;
	int				mode;
};

static int maven_get_reg(struct i2c_client* c, char reg) {
	char dst;
	struct i2c_msg msgs[] = {{ c->addr, I2C_M_REV_DIR_ADDR, sizeof(reg), &reg },
				 { c->addr, I2C_M_RD | I2C_M_NOSTART, sizeof(dst), &dst }};
	s32 err;

	err = i2c_transfer(c->adapter, msgs, 2);
	if (err < 0)
		printk(KERN_INFO "ReadReg(%d) failed\n", reg);
	return dst & 0xFF;
}

static int maven_set_reg(struct i2c_client* c, int reg, int val) {
	s32 err;

	err = i2c_smbus_write_byte_data(c, reg, val);
	if (err)
		printk(KERN_INFO "WriteReg(%d) failed\n", reg);
	return err;
}

static int maven_set_reg_pair(struct i2c_client* c, int reg, int val) {
	s32 err;

	err = i2c_smbus_write_word_data(c, reg, val);
	if (err)
		printk(KERN_INFO "WriteRegPair(%d) failed\n", reg);
	return err;
}

static const struct matrox_pll_features maven_pll = {
	50000,
	27000,
	4, 127,
	2, 31,
	3
};

struct matrox_pll_features2 {
	unsigned int	vco_freq_min;
	unsigned int	vco_freq_max;
	unsigned int	feed_div_min;
	unsigned int	feed_div_max;
	unsigned int	in_div_min;
	unsigned int	in_div_max;
	unsigned int	post_shift_max;
};

struct matrox_pll_ctl {
	unsigned int	ref_freq;
	unsigned int	den;
};

static const struct matrox_pll_features2 maven1000_pll = {
	 50000000,
	300000000,
	 5, 128,
	 3,  32,
	 3
};

static const struct matrox_pll_ctl maven_PAL = {
	540000,
	    50
};

static const struct matrox_pll_ctl maven_NTSC = {
	450450,	/* 27027000/60 == 27000000/59.94005994 */
	    60
};

static int matroxfb_PLL_mavenclock(const struct matrox_pll_features2* pll,
		const struct matrox_pll_ctl* ctl,
		unsigned int htotal, unsigned int vtotal,
		unsigned int* in, unsigned int* feed, unsigned int* post,
		unsigned int* h2) {
	unsigned int besth2 = 0;
	unsigned int fxtal = ctl->ref_freq;
	unsigned int fmin = pll->vco_freq_min / ctl->den;
	unsigned int fwant;
	unsigned int p;
	unsigned int scrlen;
	unsigned int fmax;

	DBG("PLL_calcclock")

	scrlen = htotal * (vtotal - 1);
	fwant = htotal * vtotal;
	fmax = pll->vco_freq_max / ctl->den;

	printk(KERN_DEBUG "want: %u, xtal: %u, h: %u, v: %u, fmax: %u\n",
		fwant, fxtal, htotal, vtotal, fmax);
	for (p = 1; p <= pll->post_shift_max; p++) {
		if (fwant * 2 > fmax)
			break;
		fwant *= 2;
	}
	if (fwant > fmax)
		return 0;
	for (; p-- > 0; fwant >>= 1) {
		unsigned int m;

		if (fwant < fmin) break;
		for (m = pll->in_div_min; m <= pll->in_div_max; m++) {
			unsigned int n;
			unsigned int dvd;
			unsigned int ln;

			n = (fwant * m) / fxtal;
			if (n < pll->feed_div_min)
				continue;
			if (n > pll->feed_div_max)
				break;

			ln = fxtal * n;
			dvd = m << p;

			if (ln % dvd)
				continue;
			ln = ln / dvd;

			if (ln < scrlen + 2)
				continue;
			ln = ln - scrlen;
			if (ln > htotal)
				continue;
			printk(KERN_DEBUG "Match: %u / %u / %u / %u\n", n, m, p, ln);
			if (ln > besth2) {
				printk(KERN_DEBUG "Better...\n");
				*h2 = besth2 = ln;
				*post = p;
				*in = m;
				*feed = n;
			}
		}
	}
	if (besth2 < 2)
		return 0;
	dprintk(KERN_ERR "clk: %02X %02X %02X %d %d\n", *in, *feed, *post, fxtal, fwant);
	return fxtal * (*feed) / (*in) * ctl->den;
}

static unsigned int matroxfb_mavenclock(const struct matrox_pll_ctl* ctl,
		unsigned int htotal, unsigned int vtotal,
		unsigned int* in, unsigned int* feed, unsigned int* post,
		unsigned int* htotal2) {
	unsigned int fvco;
	unsigned int p;

	fvco = matroxfb_PLL_mavenclock(&maven1000_pll, ctl, htotal, vtotal, in, feed, &p, htotal2);
	if (!fvco)
		return -EINVAL;
	p = (1 << p) - 1;
	if (fvco <= 100000000)
		;
	else if (fvco <= 140000000)
		p |= 0x08;
	else if (fvco <= 180000000)
		p |= 0x10;
	else
		p |= 0x18;
	*post = p;
	return 0;
}

static void DAC1064_calcclock(unsigned int freq, unsigned int fmax,
		unsigned int* in, unsigned int* feed, unsigned int* post) {
	unsigned int fvco;
	unsigned int p;

	fvco = matroxfb_PLL_calcclock(&maven_pll, freq, fmax, in, feed, &p);
	p = (1 << p) - 1;
	if (fvco <= 100000)
		;
	else if (fvco <= 140000)
		p |= 0x08;
	else if (fvco <= 180000)
		p |= 0x10;
	else
		p |= 0x18;
	*post = p;
	return;
}

static void maven_init_TVdata(const struct maven_data* md, struct mavenregs* data) {
	static struct mavenregs palregs = { {
		0x2A, 0x09, 0x8A, 0xCB,	/* 00: chroma subcarrier */
		0x00,
		0x00,	/* ? not written */
		0x00,	/* modified by code (F9 written...) */
		0x00,	/* ? not written */
		0x7E,	/* 08 */
		0x44,	/* 09 */
		0x9C,	/* 0A */
		0x2E,	/* 0B */
		0x21,	/* 0C */
		0x00,	/* ? not written */
		0x3F, 0x03, /* 0E-0F */
		0x3F, 0x03, /* 10-11 */
		0x1A,	/* 12 */
		0x2A,	/* 13 */
		0x1C, 0x3D, 0x14, /* 14-16 */
		0x9C, 0x01, /* 17-18 */
		0x00,	/* 19 */
		0xFE,	/* 1A */
		0x7E,	/* 1B */
		0x60,	/* 1C */
		0x05,	/* 1D */
		0x89, 0x03, /* 1E-1F */
		0x72,	/* 20 */
		0x07,	/* 21 */
		0x72,	/* 22 */
		0x00,	/* 23 */
		0x00,	/* 24 */
		0x00,	/* 25 */
		0x08,	/* 26 */
		0x04,	/* 27 */
		0x00,	/* 28 */
		0x1A,	/* 29 */
		0x55, 0x01, /* 2A-2B */
		0x26,	/* 2C */
		0x07, 0x7E, /* 2D-2E */
		0x02, 0x54, /* 2F-30 */
		0xB0, 0x00, /* 31-32 */
		0x14,	/* 33 */
		0x49,	/* 34 */
		0x00,	/* 35 written multiple times */
		0x00,	/* 36 not written */
		0xA3,	/* 37 */
		0xC8,	/* 38 */
		0x22,	/* 39 */
		0x02,	/* 3A */
		0x22,	/* 3B */
		0x3F, 0x03, /* 3C-3D */
		0x00,	/* 3E written multiple times */
		0x00,	/* 3F not written */
	}, MODE_PAL, 625, 50 };
	static struct mavenregs ntscregs = { {
		0x21, 0xF0, 0x7C, 0x1F,	/* 00: chroma subcarrier */
		0x00,
		0x00,	/* ? not written */
		0x00,	/* modified by code (F9 written...) */
		0x00,	/* ? not written */
		0x7E,	/* 08 */
		0x43,	/* 09 */
		0x7E,	/* 0A */
		0x3D,	/* 0B */
		0x00,	/* 0C */
		0x00,	/* ? not written */
		0x41, 0x00, /* 0E-0F */
		0x3C, 0x00, /* 10-11 */
		0x17,	/* 12 */
		0x21,	/* 13 */
		0x1B, 0x1B, 0x24, /* 14-16 */
		0x83, 0x01, /* 17-18 */
		0x00,	/* 19 */
		0x0F,	/* 1A */
		0x0F,	/* 1B */
		0x60,	/* 1C */
		0x05,	/* 1D */
		0x89, 0x02, /* 1E-1F */
		0x5F,	/* 20 */
		0x04,	/* 21 */
		0x5F,	/* 22 */
		0x01,	/* 23 */
		0x02,	/* 24 */
		0x00,	/* 25 */
		0x0A,	/* 26 */
		0x05,	/* 27 */
		0x00,	/* 28 */
		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 };

	if (md->mode & MODE_PAL)
		*data = palregs;
	else
		*data = ntscregs;

	data->regs[0x93] = 0xA2;

	/* gamma correction registers */
	data->regs[0x83] = 0x00;
	data->regs[0x84] = 0x00;
	data->regs[0x85] = 0x00;
	data->regs[0x86] = 0x1F;
	data->regs[0x87] = 0x10;
	data->regs[0x88] = 0x10;
	data->regs[0x89] = 0x10;
	data->regs[0x8A] = 0x64;	/* 100 */
	data->regs[0x8B] = 0xC8;	/* 200 */

	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, 0x00);

	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 &= 0x10;			/* 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);