board/gdsys/common/osd.c - u-boot - Git at Google

 // SPDX-License-Identifier: GPL-2.0+
 /*
  * (C) Copyright 2010
  * Dirk Eibach,  Guntermann & Drunck GmbH, dirk.eibach@gdsys.cc
  */

 #include <common.h>
 #include <i2c.h>
 #include <malloc.h>

 #include "ch7301.h"
 #include "dp501.h"
 #include <gdsys_fpga.h>

 #define ICS8N3QV01_I2C_ADDR 0x6E
 #define ICS8N3QV01_FREF 114285000
 #define ICS8N3QV01_FREF_LL 114285000LL
 #define ICS8N3QV01_F_DEFAULT_0 156250000LL
 #define ICS8N3QV01_F_DEFAULT_1 125000000LL
 #define ICS8N3QV01_F_DEFAULT_2 100000000LL
 #define ICS8N3QV01_F_DEFAULT_3  25175000LL

 #define SIL1178_MASTER_I2C_ADDRESS 0x38
 #define SIL1178_SLAVE_I2C_ADDRESS 0x39

 #define PIXCLK_640_480_60 25180000
 #define MAX_X_CHARS 53
 #define MAX_Y_CHARS 26

 #ifdef CONFIG_SYS_OSD_DH
 #define MAX_OSD_SCREEN 8
 #define OSD_DH_BASE 4
 #else
 #define MAX_OSD_SCREEN 4
 #endif

 #ifdef CONFIG_SYS_OSD_DH
 #define OSD_SET_REG(screen, fld, val) \
 	do { \
 		if (screen >= OSD_DH_BASE) \
 			FPGA_SET_REG(screen - OSD_DH_BASE, osd1.fld, val); \
 		else \
 			FPGA_SET_REG(screen, osd0.fld, val); \
 	} while (0)
 #else
 #define OSD_SET_REG(screen, fld, val) \
 		FPGA_SET_REG(screen, osd0.fld, val)
 #endif

 #ifdef CONFIG_SYS_OSD_DH
 #define OSD_GET_REG(screen, fld, val) \
 	do {					\
 		if (screen >= OSD_DH_BASE) \
 			FPGA_GET_REG(screen - OSD_DH_BASE, osd1.fld, val); \
 		else \
 			FPGA_GET_REG(screen, osd0.fld, val); \
 	} while (0)
 #else
 #define OSD_GET_REG(screen, fld, val) \
 		FPGA_GET_REG(screen, osd0.fld, val)
 #endif

 unsigned int base_width;
 unsigned int base_height;
 size_t bufsize;
 u16 *buf;

 unsigned int osd_screen_mask = 0;

 #ifdef CONFIG_SYS_ICS8N3QV01_I2C
 int ics8n3qv01_i2c[] = CONFIG_SYS_ICS8N3QV01_I2C;
 #endif

 #ifdef CONFIG_SYS_SIL1178_I2C
 int sil1178_i2c[] = CONFIG_SYS_SIL1178_I2C;
 #endif

 #ifdef CONFIG_SYS_MPC92469AC
 static void mpc92469ac_calc_parameters(unsigned int fout,
 	unsigned int *post_div, unsigned int *feedback_div)
 {
 	unsigned int n = *post_div;
 	unsigned int m = *feedback_div;
 	unsigned int a;
 	unsigned int b = 14745600 / 16;

 	if (fout < 50169600)
 		n = 8;
 	else if (fout < 100339199)
 		n = 4;
 	else if (fout < 200678399)
 		n = 2;
 	else
 		n = 1;

 	a = fout * n + (b / 2); /* add b/2 for proper rounding */

 	m = a / b;

 	*post_div = n;
 	*feedback_div = m;
 }

 static void mpc92469ac_set(unsigned screen, unsigned int fout)
 {
 	unsigned int n;
 	unsigned int m;
 	unsigned int bitval = 0;
 	mpc92469ac_calc_parameters(fout, &n, &m);

 	switch (n) {
 	case 1:
 		bitval = 0x00;
 		break;
 	case 2:
 		bitval = 0x01;
 		break;
 	case 4:
 		bitval = 0x02;
 		break;
 	case 8:
 		bitval = 0x03;
 		break;
 	}

 	FPGA_SET_REG(screen, mpc3w_control, (bitval << 9) | m);
 }
 #endif

 #ifdef CONFIG_SYS_ICS8N3QV01_I2C

 static unsigned int ics8n3qv01_get_fout_calc(unsigned index)
 {
 	unsigned long long n;
 	unsigned long long mint;
 	unsigned long long mfrac;
 	u8 reg_a, reg_b, reg_c, reg_d, reg_f;
 	unsigned long long fout_calc;

 	if (index > 3)
 		return 0;

 	reg_a = i2c_reg_read(ICS8N3QV01_I2C_ADDR, 0 + index);
 	reg_b = i2c_reg_read(ICS8N3QV01_I2C_ADDR, 4 + index);
 	reg_c = i2c_reg_read(ICS8N3QV01_I2C_ADDR, 8 + index);
 	reg_d = i2c_reg_read(ICS8N3QV01_I2C_ADDR, 12 + index);
 	reg_f = i2c_reg_read(ICS8N3QV01_I2C_ADDR, 20 + index);

 	mint = ((reg_a >> 1) & 0x1f) | (reg_f & 0x20);
 	mfrac = ((reg_a & 0x01) << 17) | (reg_b << 9) | (reg_c << 1)
 		| (reg_d >> 7);
 	n = reg_d & 0x7f;

 	fout_calc = (mint * ICS8N3QV01_FREF_LL
 		     + mfrac * ICS8N3QV01_FREF_LL / 262144LL
 		     + ICS8N3QV01_FREF_LL / 524288LL
 		     + n / 2)
 		    / n
 		    * 1000000
 		    / (1000000 - 100);

 	return fout_calc;
 }


 static void ics8n3qv01_calc_parameters(unsigned int fout,
 	unsigned int *_mint, unsigned int *_mfrac,
 	unsigned int *_n)
 {
 	unsigned int n;
 	unsigned int foutiic;
 	unsigned int fvcoiic;
 	unsigned int mint;
 	unsigned long long mfrac;

 	n = (2215000000U + fout / 2) / fout;
 	if ((n & 1) && (n > 5))
 		n -= 1;

 	foutiic = fout - (fout / 10000);
 	fvcoiic = foutiic * n;

 	mint = fvcoiic / 114285000;
 	if ((mint < 17) || (mint > 63))
 		printf("ics8n3qv01_calc_parameters: cannot determine mint\n");

 	mfrac = ((unsigned long long)fvcoiic % 114285000LL) * 262144LL
 		/ 114285000LL;

 	*_mint = mint;
 	*_mfrac = mfrac;
 	*_n = n;
 }

 static void ics8n3qv01_set(unsigned int fout)
 {
 	unsigned int n;
 	unsigned int mint;
 	unsigned int mfrac;
 	unsigned int fout_calc;
 	unsigned long long fout_prog;
 	long long off_ppm;
 	u8 reg0, reg4, reg8, reg12, reg18, reg20;

 	fout_calc = ics8n3qv01_get_fout_calc(1);
 	off_ppm = (fout_calc - ICS8N3QV01_F_DEFAULT_1) * 1000000
 		  / ICS8N3QV01_F_DEFAULT_1;
 	printf("       PLL is off by %lld ppm\n", off_ppm);
 	fout_prog = (unsigned long long)fout * (unsigned long long)fout_calc
 		    / ICS8N3QV01_F_DEFAULT_1;
 	ics8n3qv01_calc_parameters(fout_prog, &mint, &mfrac, &n);

 	reg0 = i2c_reg_read(ICS8N3QV01_I2C_ADDR, 0) & 0xc0;
 	reg0 |= (mint & 0x1f) << 1;
 	reg0 |= (mfrac >> 17) & 0x01;
 	i2c_reg_write(ICS8N3QV01_I2C_ADDR, 0, reg0);

 	reg4 = mfrac >> 9;
 	i2c_reg_write(ICS8N3QV01_I2C_ADDR, 4, reg4);

 	reg8 = mfrac >> 1;
 	i2c_reg_write(ICS8N3QV01_I2C_ADDR, 8, reg8);

 	reg12 = mfrac << 7;
 	reg12 |= n & 0x7f;
 	i2c_reg_write(ICS8N3QV01_I2C_ADDR, 12, reg12);

 	reg18 = i2c_reg_read(ICS8N3QV01_I2C_ADDR, 18) & 0x03;
 	reg18 |= 0x20;
 	i2c_reg_write(ICS8N3QV01_I2C_ADDR, 18, reg18);

 	reg20 = i2c_reg_read(ICS8N3QV01_I2C_ADDR, 20) & 0x1f;
 	reg20 |= mint & (1 << 5);
 	i2c_reg_write(ICS8N3QV01_I2C_ADDR, 20, reg20);
 }
 #endif

 static int osd_write_videomem(unsigned screen, unsigned offset,
 	u16 *data, size_t charcount)
 {
 	unsigned int k;

 	for (k = 0; k < charcount; ++k) {
 		if (offset + k >= bufsize)
 			return -1;
 #ifdef CONFIG_SYS_OSD_DH
 		if (screen >= OSD_DH_BASE)
 			FPGA_SET_REG(screen - OSD_DH_BASE,
 				     videomem1[offset + k], data[k]);
 		else
 			FPGA_SET_REG(screen, videomem0[offset + k], data[k]);
 #else
 		FPGA_SET_REG(screen, videomem0[offset + k], data[k]);
 #endif
 	}

 	return charcount;
 }

 static int osd_print(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 {
 	unsigned screen;

 	if (argc < 5) {
 		cmd_usage(cmdtp);
 		return 1;
 	}

 	for (screen = 0; screen < MAX_OSD_SCREEN; ++screen) {
 		unsigned x;
 		unsigned y;
 		unsigned charcount;
 		unsigned len;
 		u8 color;
 		unsigned int k;
 		char *text;
 		int res;

 		if (!(osd_screen_mask & (1 << screen)))
 			continue;

 		x = simple_strtoul(argv[1], NULL, 16);
 		y = simple_strtoul(argv[2], NULL, 16);
 		color = simple_strtoul(argv[3], NULL, 16);
 		text = argv[4];
 		charcount = strlen(text);
 		len = (charcount > bufsize) ? bufsize : charcount;

 		for (k = 0; k < len; ++k)
 			buf[k] = (text[k] << 8) | color;

 		res = osd_write_videomem(screen, y * base_width + x, buf, len);
 		if (res < 0)
 			return res;

 		OSD_SET_REG(screen, control, 0x0049);
 	}

 	return 0;
 }

 int osd_probe(unsigned screen)
 {
 	u16 version;
 	u16 features;
 	int old_bus = i2c_get_bus_num();
 	bool pixclock_present = false;
 	bool output_driver_present = false;

 	OSD_GET_REG(0, version, &version);
 	OSD_GET_REG(0, features, &features);

 	base_width = ((features & 0x3f00) >> 8) + 1;
 	base_height = (features & 0x001f) + 1;
 	bufsize = base_width * base_height;
 	buf = malloc(sizeof(u16) * bufsize);
 	if (!buf)
 		return -1;

 #ifdef CONFIG_SYS_OSD_DH
 	printf("OSD%d-%d: Digital-OSD version %01d.%02d, %d" "x%d characters\n",
 	       (screen >= OSD_DH_BASE) ? (screen - OSD_DH_BASE) : screen,
 	       (screen > 3) ? 1 : 0, version/100, version%100, base_width,
 	       base_height);
 #else
 	printf("OSD%d:  Digital-OSD version %01d.%02d, %d" "x%d characters\n",
 	       screen, version/100, version%100, base_width, base_height);
 #endif
 	/* setup pixclock */

 #ifdef CONFIG_SYS_MPC92469AC
 	pixclock_present = true;
 	mpc92469ac_set(screen, PIXCLK_640_480_60);
 #endif

 #ifdef CONFIG_SYS_ICS8N3QV01_I2C
 	i2c_set_bus_num(ics8n3qv01_i2c[screen]);
 	if (!i2c_probe(ICS8N3QV01_I2C_ADDR)) {
 		ics8n3qv01_set(PIXCLK_640_480_60);
 		pixclock_present = true;
 	}
 #endif

 	if (!pixclock_present)
 		printf("       no pixelclock found\n");

 	/* setup output driver */

 #ifdef CONFIG_SYS_CH7301_I2C
 	if (!ch7301_probe(screen, true))
 		output_driver_present = true;
 #endif

 #ifdef CONFIG_SYS_SIL1178_I2C
 	i2c_set_bus_num(sil1178_i2c[screen]);
 	if (!i2c_probe(SIL1178_SLAVE_I2C_ADDRESS)) {
 		if (i2c_reg_read(SIL1178_SLAVE_I2C_ADDRESS, 0x02) == 0x06) {
 			/*
 			 * magic initialization sequence,
 			 * adapted from datasheet
 			 */
 			i2c_reg_write(SIL1178_SLAVE_I2C_ADDRESS, 0x08, 0x36);
 			i2c_reg_write(SIL1178_MASTER_I2C_ADDRESS, 0x0f, 0x44);
 			i2c_reg_write(SIL1178_MASTER_I2C_ADDRESS, 0x0f, 0x4c);
 			i2c_reg_write(SIL1178_MASTER_I2C_ADDRESS, 0x0e, 0x10);
 			i2c_reg_write(SIL1178_MASTER_I2C_ADDRESS, 0x0a, 0x80);
 			i2c_reg_write(SIL1178_MASTER_I2C_ADDRESS, 0x09, 0x30);
 			i2c_reg_write(SIL1178_MASTER_I2C_ADDRESS, 0x0c, 0x89);
 			i2c_reg_write(SIL1178_MASTER_I2C_ADDRESS, 0x0d, 0x60);
 			i2c_reg_write(SIL1178_MASTER_I2C_ADDRESS, 0x08, 0x36);
 			i2c_reg_write(SIL1178_MASTER_I2C_ADDRESS, 0x08, 0x37);
 			output_driver_present = true;
 		}
 	}
 #endif

 #ifdef CONFIG_SYS_DP501_I2C
 	if (!dp501_probe(screen, true))
 		output_driver_present = true;
 #endif

 	if (!output_driver_present)
 		printf("       no output driver found\n");

 	OSD_SET_REG(screen, xy_size, ((32 - 1) << 8) | (16 - 1));
 	OSD_SET_REG(screen, x_pos, 0x007f);
 	OSD_SET_REG(screen, y_pos, 0x005f);

 	if (pixclock_present && output_driver_present)
 		osd_screen_mask |= 1 << screen;

 	i2c_set_bus_num(old_bus);

 	return 0;
 }

 int osd_write(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 {
 	unsigned screen;

 	if ((argc < 4) || (strlen(argv[3]) % 4)) {
 		cmd_usage(cmdtp);
 		return 1;
 	}

 	for (screen = 0; screen < MAX_OSD_SCREEN; ++screen) {
 		unsigned x;
 		unsigned y;
 		unsigned k;
 		u16 buffer[base_width];
 		char *rp;
 		u16 *wp = buffer;
 		unsigned count = (argc > 4) ?
 			simple_strtoul(argv[4], NULL, 16) : 1;

 		if (!(osd_screen_mask & (1 << screen)))
 			continue;

 		x = simple_strtoul(argv[1], NULL, 16);
 		y = simple_strtoul(argv[2], NULL, 16);
 		rp = argv[3];


 		while (*rp) {
 			char substr[5];

 			memcpy(substr, rp, 4);
 			substr[4] = 0;
 			*wp = simple_strtoul(substr, NULL, 16);

 			rp += 4;
 			wp++;
 			if (wp - buffer > base_width)
 				break;
 		}

 		for (k = 0; k < count; ++k) {
 			unsigned offset =
 				y * base_width + x + k * (wp - buffer);
 			osd_write_videomem(screen, offset, buffer,
 				wp - buffer);
 		}

 		OSD_SET_REG(screen, control, 0x0049);
 	}

 	return 0;
 }

 int osd_size(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 {
 	unsigned screen;
 	unsigned x;
 	unsigned y;

 	if (argc < 3) {
 		cmd_usage(cmdtp);
 		return 1;
 	}

 	x = simple_strtoul(argv[1], NULL, 16);
 	y = simple_strtoul(argv[2], NULL, 16);

 	if (!x || (x > 64) || (x > MAX_X_CHARS) ||
 	    !y || (y > 32) || (y > MAX_Y_CHARS)) {
 		cmd_usage(cmdtp);
 		return 1;
 	}

 	for (screen = 0; screen < MAX_OSD_SCREEN; ++screen) {
 		if (!(osd_screen_mask & (1 << screen)))
 			continue;

 		OSD_SET_REG(screen, xy_size, ((x - 1) << 8) | (y - 1));
 		OSD_SET_REG(screen, x_pos, 32767 * (640 - 12 * x) / 65535);
 		OSD_SET_REG(screen, y_pos, 32767 * (480 - 18 * y) / 65535);
 	}

 	return 0;
 }

 U_BOOT_CMD(
 	osdw, 5, 0, osd_write,
 	"write 16-bit hex encoded buffer to osd memory",
 	"pos_x pos_y buffer count\n"
 );

 U_BOOT_CMD(
 	osdp, 5, 0, osd_print,
 	"write ASCII buffer to osd memory",
 	"pos_x pos_y color text\n"
 );

 U_BOOT_CMD(
 	osdsize, 3, 0, osd_size,
 	"set OSD XY size in characters",
 	"size_x(max. " __stringify(MAX_X_CHARS)
 	") size_y(max. " __stringify(MAX_Y_CHARS) ")\n"
 );
	// SPDX-License-Identifier: GPL-2.0+
	/*
	* (C) Copyright 2010
	* Dirk Eibach, Guntermann & Drunck GmbH, dirk.eibach@gdsys.cc
	*/

	#include <common.h>
	#include <i2c.h>
	#include <malloc.h>

	#include "ch7301.h"
	#include "dp501.h"
	#include <gdsys_fpga.h>

	#define ICS8N3QV01_I2C_ADDR 0x6E
	#define ICS8N3QV01_FREF 114285000
	#define ICS8N3QV01_FREF_LL 114285000LL
	#define ICS8N3QV01_F_DEFAULT_0 156250000LL
	#define ICS8N3QV01_F_DEFAULT_1 125000000LL
	#define ICS8N3QV01_F_DEFAULT_2 100000000LL
	#define ICS8N3QV01_F_DEFAULT_3 25175000LL

	#define SIL1178_MASTER_I2C_ADDRESS 0x38
	#define SIL1178_SLAVE_I2C_ADDRESS 0x39

	#define PIXCLK_640_480_60 25180000
	#define MAX_X_CHARS 53
	#define MAX_Y_CHARS 26

	#ifdef CONFIG_SYS_OSD_DH
	#define MAX_OSD_SCREEN 8
	#define OSD_DH_BASE 4
	#else
	#define MAX_OSD_SCREEN 4
	#endif

	#ifdef CONFIG_SYS_OSD_DH
	#define OSD_SET_REG(screen, fld, val) \
	do { \
	if (screen >= OSD_DH_BASE) \
	FPGA_SET_REG(screen - OSD_DH_BASE, osd1.fld, val); \
	else \
	FPGA_SET_REG(screen, osd0.fld, val); \
	} while (0)
	#else
	#define OSD_SET_REG(screen, fld, val) \
	FPGA_SET_REG(screen, osd0.fld, val)
	#endif

	#ifdef CONFIG_SYS_OSD_DH
	#define OSD_GET_REG(screen, fld, val) \
	do { \
	if (screen >= OSD_DH_BASE) \
	FPGA_GET_REG(screen - OSD_DH_BASE, osd1.fld, val); \
	else \
	FPGA_GET_REG(screen, osd0.fld, val); \
	} while (0)
	#else
	#define OSD_GET_REG(screen, fld, val) \
	FPGA_GET_REG(screen, osd0.fld, val)
	#endif

	unsigned int base_width;
	unsigned int base_height;
	size_t bufsize;
	u16 *buf;

	unsigned int osd_screen_mask = 0;

	#ifdef CONFIG_SYS_ICS8N3QV01_I2C
	int ics8n3qv01_i2c[] = CONFIG_SYS_ICS8N3QV01_I2C;
	#endif

	#ifdef CONFIG_SYS_SIL1178_I2C
	int sil1178_i2c[] = CONFIG_SYS_SIL1178_I2C;
	#endif

	#ifdef CONFIG_SYS_MPC92469AC
	static void mpc92469ac_calc_parameters(unsigned int fout,
	unsigned int post_div, unsigned int feedback_div)
	{
	unsigned int n = *post_div;
	unsigned int m = *feedback_div;
	unsigned int a;
	unsigned int b = 14745600 / 16;

	if (fout < 50169600)
	n = 8;
	else if (fout < 100339199)
	n = 4;
	else if (fout < 200678399)
	n = 2;
	else
	n = 1;

	a = fout * n + (b / 2); /* add b/2 for proper rounding */

	m = a / b;

	*post_div = n;
	*feedback_div = m;
	}

	static void mpc92469ac_set(unsigned screen, unsigned int fout)
	{
	unsigned int n;
	unsigned int m;
	unsigned int bitval = 0;
	mpc92469ac_calc_parameters(fout, &n, &m);

	switch (n) {
	case 1:
	bitval = 0x00;
	break;
	case 2:
	bitval = 0x01;
	break;
	case 4:
	bitval = 0x02;
	break;
	case 8:
	bitval = 0x03;
	break;
	}

	FPGA_SET_REG(screen, mpc3w_control, (bitval << 9) \| m);
	}
	#endif

	#ifdef CONFIG_SYS_ICS8N3QV01_I2C

	static unsigned int ics8n3qv01_get_fout_calc(unsigned index)
	{
	unsigned long long n;
	unsigned long long mint;
	unsigned long long mfrac;
	u8 reg_a, reg_b, reg_c, reg_d, reg_f;
	unsigned long long fout_calc;

	if (index > 3)
	return 0;

	reg_a = i2c_reg_read(ICS8N3QV01_I2C_ADDR, 0 + index);
	reg_b = i2c_reg_read(ICS8N3QV01_I2C_ADDR, 4 + index);
	reg_c = i2c_reg_read(ICS8N3QV01_I2C_ADDR, 8 + index);
	reg_d = i2c_reg_read(ICS8N3QV01_I2C_ADDR, 12 + index);
	reg_f = i2c_reg_read(ICS8N3QV01_I2C_ADDR, 20 + index);

	mint = ((reg_a >> 1) & 0x1f) \| (reg_f & 0x20);
	mfrac = ((reg_a & 0x01) << 17) \| (reg_b << 9) \| (reg_c << 1)
	\| (reg_d >> 7);
	n = reg_d & 0x7f;

	fout_calc = (mint * ICS8N3QV01_FREF_LL
	+ mfrac * ICS8N3QV01_FREF_LL / 262144LL
	+ ICS8N3QV01_FREF_LL / 524288LL
	+ n / 2)
	/ n
	* 1000000
	/ (1000000 - 100);

	return fout_calc;
	}


	static void ics8n3qv01_calc_parameters(unsigned int fout,
	unsigned int _mint, unsigned int _mfrac,
	unsigned int *_n)
	{
	unsigned int n;
	unsigned int foutiic;
	unsigned int fvcoiic;
	unsigned int mint;
	unsigned long long mfrac;

	n = (2215000000U + fout / 2) / fout;
	if ((n & 1) && (n > 5))
	n -= 1;

	foutiic = fout - (fout / 10000);
	fvcoiic = foutiic * n;

	mint = fvcoiic / 114285000;
	if ((mint < 17) \|\| (mint > 63))
	printf("ics8n3qv01_calc_parameters: cannot determine mint\n");

	mfrac = ((unsigned long long)fvcoiic % 114285000LL) * 262144LL
	/ 114285000LL;

	*_mint = mint;
	*_mfrac = mfrac;
	*_n = n;
	}

	static void ics8n3qv01_set(unsigned int fout)
	{
	unsigned int n;
	unsigned int mint;
	unsigned int mfrac;
	unsigned int fout_calc;
	unsigned long long fout_prog;
	long long off_ppm;
	u8 reg0, reg4, reg8, reg12, reg18, reg20;

	fout_calc = ics8n3qv01_get_fout_calc(1);
	off_ppm = (fout_calc - ICS8N3QV01_F_DEFAULT_1) * 1000000
	/ ICS8N3QV01_F_DEFAULT_1;
	printf(" PLL is off by %lld ppm\n", off_ppm);
	fout_prog = (unsigned long long)fout * (unsigned long long)fout_calc
	/ ICS8N3QV01_F_DEFAULT_1;
	ics8n3qv01_calc_parameters(fout_prog, &mint, &mfrac, &n);

	reg0 = i2c_reg_read(ICS8N3QV01_I2C_ADDR, 0) & 0xc0;
	reg0 \|= (mint & 0x1f) << 1;
	reg0 \|= (mfrac >> 17) & 0x01;
	i2c_reg_write(ICS8N3QV01_I2C_ADDR, 0, reg0);

	reg4 = mfrac >> 9;
	i2c_reg_write(ICS8N3QV01_I2C_ADDR, 4, reg4);

	reg8 = mfrac >> 1;
	i2c_reg_write(ICS8N3QV01_I2C_ADDR, 8, reg8);

	reg12 = mfrac << 7;
	reg12 \|= n & 0x7f;
	i2c_reg_write(ICS8N3QV01_I2C_ADDR, 12, reg12);

	reg18 = i2c_reg_read(ICS8N3QV01_I2C_ADDR, 18) & 0x03;
	reg18 \|= 0x20;
	i2c_reg_write(ICS8N3QV01_I2C_ADDR, 18, reg18);

	reg20 = i2c_reg_read(ICS8N3QV01_I2C_ADDR, 20) & 0x1f;
	reg20 \|= mint & (1 << 5);
	i2c_reg_write(ICS8N3QV01_I2C_ADDR, 20, reg20);
	}
	#endif

	static int osd_write_videomem(unsigned screen, unsigned offset,
	u16 *data, size_t charcount)
	{
	unsigned int k;

	for (k = 0; k < charcount; ++k) {
	if (offset + k >= bufsize)
	return -1;
	#ifdef CONFIG_SYS_OSD_DH
	if (screen >= OSD_DH_BASE)
	FPGA_SET_REG(screen - OSD_DH_BASE,
	videomem1[offset + k], data[k]);
	else
	FPGA_SET_REG(screen, videomem0[offset + k], data[k]);
	#else
	FPGA_SET_REG(screen, videomem0[offset + k], data[k]);
	#endif
	}

	return charcount;
	}

	static int osd_print(cmd_tbl_t cmdtp, int flag, int argc, char const argv[])
	{
	unsigned screen;

	if (argc < 5) {
	cmd_usage(cmdtp);
	return 1;
	}

	for (screen = 0; screen < MAX_OSD_SCREEN; ++screen) {
	unsigned x;
	unsigned y;
	unsigned charcount;
	unsigned len;
	u8 color;
	unsigned int k;
	char *text;
	int res;

	if (!(osd_screen_mask & (1 << screen)))
	continue;

	x = simple_strtoul(argv[1], NULL, 16);
	y = simple_strtoul(argv[2], NULL, 16);
	color = simple_strtoul(argv[3], NULL, 16);
	text = argv[4];
	charcount = strlen(text);
	len = (charcount > bufsize) ? bufsize : charcount;

	for (k = 0; k < len; ++k)
	buf[k] = (text[k] << 8) \| color;

	res = osd_write_videomem(screen, y * base_width + x, buf, len);
	if (res < 0)
	return res;

	OSD_SET_REG(screen, control, 0x0049);
	}

	return 0;
	}

	int osd_probe(unsigned screen)
	{
	u16 version;
	u16 features;
	int old_bus = i2c_get_bus_num();
	bool pixclock_present = false;
	bool output_driver_present = false;

	OSD_GET_REG(0, version, &version);
	OSD_GET_REG(0, features, &features);

	base_width = ((features & 0x3f00) >> 8) + 1;
	base_height = (features & 0x001f) + 1;
	bufsize = base_width * base_height;
	buf = malloc(sizeof(u16) * bufsize);
	if (!buf)
	return -1;

	#ifdef CONFIG_SYS_OSD_DH
	printf("OSD%d-%d: Digital-OSD version %01d.%02d, %d" "x%d characters\n",
	(screen >= OSD_DH_BASE) ? (screen - OSD_DH_BASE) : screen,
	(screen > 3) ? 1 : 0, version/100, version%100, base_width,
	base_height);
	#else
	printf("OSD%d: Digital-OSD version %01d.%02d, %d" "x%d characters\n",
	screen, version/100, version%100, base_width, base_height);
	#endif
	/* setup pixclock */

	#ifdef CONFIG_SYS_MPC92469AC
	pixclock_present = true;
	mpc92469ac_set(screen, PIXCLK_640_480_60);
	#endif

	#ifdef CONFIG_SYS_ICS8N3QV01_I2C
	i2c_set_bus_num(ics8n3qv01_i2c[screen]);
	if (!i2c_probe(ICS8N3QV01_I2C_ADDR)) {
	ics8n3qv01_set(PIXCLK_640_480_60);
	pixclock_present = true;
	}
	#endif

	if (!pixclock_present)
	printf(" no pixelclock found\n");

	/* setup output driver */

	#ifdef CONFIG_SYS_CH7301_I2C
	if (!ch7301_probe(screen, true))
	output_driver_present = true;
	#endif

	#ifdef CONFIG_SYS_SIL1178_I2C
	i2c_set_bus_num(sil1178_i2c[screen]);
	if (!i2c_probe(SIL1178_SLAVE_I2C_ADDRESS)) {
	if (i2c_reg_read(SIL1178_SLAVE_I2C_ADDRESS, 0x02) == 0x06) {
	/*
	* magic initialization sequence,
	* adapted from datasheet
	*/
	i2c_reg_write(SIL1178_SLAVE_I2C_ADDRESS, 0x08, 0x36);
	i2c_reg_write(SIL1178_MASTER_I2C_ADDRESS, 0x0f, 0x44);
	i2c_reg_write(SIL1178_MASTER_I2C_ADDRESS, 0x0f, 0x4c);
	i2c_reg_write(SIL1178_MASTER_I2C_ADDRESS, 0x0e, 0x10);
	i2c_reg_write(SIL1178_MASTER_I2C_ADDRESS, 0x0a, 0x80);
	i2c_reg_write(SIL1178_MASTER_I2C_ADDRESS, 0x09, 0x30);
	i2c_reg_write(SIL1178_MASTER_I2C_ADDRESS, 0x0c, 0x89);
	i2c_reg_write(SIL1178_MASTER_I2C_ADDRESS, 0x0d, 0x60);
	i2c_reg_write(SIL1178_MASTER_I2C_ADDRESS, 0x08, 0x36);
	i2c_reg_write(SIL1178_MASTER_I2C_ADDRESS, 0x08, 0x37);
	output_driver_present = true;
	}
	}
	#endif

	#ifdef CONFIG_SYS_DP501_I2C
	if (!dp501_probe(screen, true))
	output_driver_present = true;
	#endif

	if (!output_driver_present)
	printf(" no output driver found\n");

	OSD_SET_REG(screen, xy_size, ((32 - 1) << 8) \| (16 - 1));
	OSD_SET_REG(screen, x_pos, 0x007f);
	OSD_SET_REG(screen, y_pos, 0x005f);

	if (pixclock_present && output_driver_present)
	osd_screen_mask \|= 1 << screen;

	i2c_set_bus_num(old_bus);

	return 0;
	}

	int osd_write(cmd_tbl_t cmdtp, int flag, int argc, char const argv[])
	{
	unsigned screen;

	if ((argc < 4) \|\| (strlen(argv[3]) % 4)) {
	cmd_usage(cmdtp);
	return 1;
	}

	for (screen = 0; screen < MAX_OSD_SCREEN; ++screen) {
	unsigned x;
	unsigned y;
	unsigned k;
	u16 buffer[base_width];
	char *rp;
	u16 *wp = buffer;
	unsigned count = (argc > 4) ?
	simple_strtoul(argv[4], NULL, 16) : 1;

	if (!(osd_screen_mask & (1 << screen)))
	continue;

	x = simple_strtoul(argv[1], NULL, 16);
	y = simple_strtoul(argv[2], NULL, 16);
	rp = argv[3];


	while (*rp) {
	char substr[5];

	memcpy(substr, rp, 4);
	substr[4] = 0;
	*wp = simple_strtoul(substr, NULL, 16);

	rp += 4;
	wp++;
	if (wp - buffer > base_width)
	break;
	}

	for (k = 0; k < count; ++k) {
	unsigned offset =
	y * base_width + x + k * (wp - buffer);
	osd_write_videomem(screen, offset, buffer,
	wp - buffer);
	}

	OSD_SET_REG(screen, control, 0x0049);
	}

	return 0;
	}

	int osd_size(cmd_tbl_t cmdtp, int flag, int argc, char const argv[])
	{
	unsigned screen;
	unsigned x;
	unsigned y;

	if (argc < 3) {
	cmd_usage(cmdtp);
	return 1;
	}

	x = simple_strtoul(argv[1], NULL, 16);
	y = simple_strtoul(argv[2], NULL, 16);

	if (!x \|\| (x > 64) \|\| (x > MAX_X_CHARS) \|\|
	!y \|\| (y > 32) \|\| (y > MAX_Y_CHARS)) {
	cmd_usage(cmdtp);
	return 1;
	}

	for (screen = 0; screen < MAX_OSD_SCREEN; ++screen) {
	if (!(osd_screen_mask & (1 << screen)))
	continue;

	OSD_SET_REG(screen, xy_size, ((x - 1) << 8) \| (y - 1));
	OSD_SET_REG(screen, x_pos, 32767 * (640 - 12 * x) / 65535);
	OSD_SET_REG(screen, y_pos, 32767 * (480 - 18 * y) / 65535);
	}

	return 0;
	}

	U_BOOT_CMD(
	osdw, 5, 0, osd_write,
	"write 16-bit hex encoded buffer to osd memory",
	"pos_x pos_y buffer count\n"
	);

	U_BOOT_CMD(
	osdp, 5, 0, osd_print,
	"write ASCII buffer to osd memory",
	"pos_x pos_y color text\n"
	);

	U_BOOT_CMD(
	osdsize, 3, 0, osd_size,
	"set OSD XY size in characters",
	"size_x(max. " __stringify(MAX_X_CHARS)
	") size_y(max. " __stringify(MAX_Y_CHARS) ")\n"
	);