board/gdsys/common/osd.c - github/trini/u-boot - Gitiles

 /*
  * (C) Copyright 2010
  * Dirk Eibach,  Guntermann & Drunck GmbH, eibach@gdsys.de
  *
  * See file CREDITS for list of people who contributed to this
  * project.
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License as
  * published by the Free Software Foundation; either version 2 of
  * the License, or (at your option) any later version.
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  * MA 02111-1307 USA
  */

 #include <common.h>
 #include <i2c.h>
 #include <asm/io.h>

 #include <gdsys_fpga.h>

 #define CH7301_I2C_ADDR 0x75

 #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 BASE_WIDTH 32
 #define BASE_HEIGHT 16
 #define BUFSIZE (BASE_WIDTH * BASE_HEIGHT)

 enum {
 	CH7301_CM = 0x1c,		/* Clock Mode Register */
 	CH7301_IC = 0x1d,		/* Input Clock Register */
 	CH7301_GPIO = 0x1e,		/* GPIO Control Register */
 	CH7301_IDF = 0x1f,		/* Input Data Format Register */
 	CH7301_CD = 0x20,		/* Connection Detect Register */
 	CH7301_DC = 0x21,		/* DAC Control Register */
 	CH7301_HPD = 0x23,		/* Hot Plug Detection Register */
 	CH7301_TCTL = 0x31,		/* DVI Control Input Register */
 	CH7301_TPCP = 0x33,		/* DVI PLL Charge Pump Ctrl Register */
 	CH7301_TPD = 0x34,		/* DVI PLL Divide Register */
 	CH7301_TPVT = 0x35,		/* DVI PLL Supply Control Register */
 	CH7301_TPF = 0x36,		/* DVI PLL Filter Register */
 	CH7301_TCT = 0x37,		/* DVI Clock Test Register */
 	CH7301_TSTP = 0x48,		/* Test Pattern Register */
 	CH7301_PM = 0x49,		/* Power Management register */
 	CH7301_VID = 0x4a,		/* Version ID Register */
 	CH7301_DID = 0x4b,		/* Device ID Register */
 	CH7301_DSP = 0x56,		/* DVI Sync polarity Register */
 };

 #if defined(CONFIG_SYS_ICS8N3QV01) || defined(CONFIG_SYS_SIL1178)
 static void fpga_iic_write(unsigned screen, u8 slave, u8 reg, u8 data)
 {
 	struct ihs_fpga *fpga = (struct ihs_fpga *)CONFIG_SYS_FPGA_BASE(screen);
 	struct ihs_i2c *i2c = &fpga->i2c;

 	while (in_le16(&fpga->extended_interrupt) & (1 << 12))
 		;
 	out_le16(&i2c->write_mailbox_ext, reg | (data << 8));
 	out_le16(&i2c->write_mailbox, 0xc400 | (slave << 1));
 }

 static u8 fpga_iic_read(unsigned screen, u8 slave, u8 reg)
 {
 	struct ihs_fpga *fpga = (struct ihs_fpga *)CONFIG_SYS_FPGA_BASE(screen);
 	struct ihs_i2c *i2c = &fpga->i2c;
 	unsigned int ctr = 0;

 	while (in_le16(&fpga->extended_interrupt) & (1 << 12))
 		;
 	out_le16(&fpga->extended_interrupt, 1 << 14);
 	out_le16(&i2c->write_mailbox_ext, reg);
 	out_le16(&i2c->write_mailbox, 0xc000 | (slave << 1));
 	while (!(in_le16(&fpga->extended_interrupt) & (1 << 14))) {
 		udelay(100000);
 		if (ctr++ > 5) {
 			printf("iic receive timeout\n");
 			break;
 		}
 	}
 	return in_le16(&i2c->read_mailbox_ext) >> 8;
 }
 #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)
 {
 	struct ihs_fpga *fpga = (struct ihs_fpga *)CONFIG_SYS_FPGA_BASE(screen);
 	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;
 	}

 	out_le16(&fpga->mpc3w_control, (bitval << 9) | m);
 }
 #endif

 #ifdef CONFIG_SYS_ICS8N3QV01

 static unsigned int ics8n3qv01_get_fout_calc(unsigned screen, 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 = fpga_iic_read(screen, ICS8N3QV01_I2C_ADDR, 0 + index);
 	reg_b = fpga_iic_read(screen, ICS8N3QV01_I2C_ADDR, 4 + index);
 	reg_c = fpga_iic_read(screen, ICS8N3QV01_I2C_ADDR, 8 + index);
 	reg_d = fpga_iic_read(screen, ICS8N3QV01_I2C_ADDR, 12 + index);
 	reg_f = fpga_iic_read(screen, 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 screen, 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(screen, 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 = fpga_iic_read(screen, ICS8N3QV01_I2C_ADDR, 0) & 0xc0;
 	reg0 |= (mint & 0x1f) << 1;
 	reg0 |= (mfrac >> 17) & 0x01;
 	fpga_iic_write(screen, ICS8N3QV01_I2C_ADDR, 0, reg0);

 	reg4 = mfrac >> 9;
 	fpga_iic_write(screen, ICS8N3QV01_I2C_ADDR, 4, reg4);

 	reg8 = mfrac >> 1;
 	fpga_iic_write(screen, ICS8N3QV01_I2C_ADDR, 8, reg8);

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

 	reg18 = fpga_iic_read(screen, ICS8N3QV01_I2C_ADDR, 18) & 0x03;
 	reg18 |= 0x20;
 	fpga_iic_write(screen, ICS8N3QV01_I2C_ADDR, 18, reg18);

 	reg20 = fpga_iic_read(screen, ICS8N3QV01_I2C_ADDR, 20) & 0x1f;
 	reg20 |= mint & (1 << 5);
 	fpga_iic_write(screen, ICS8N3QV01_I2C_ADDR, 20, reg20);
 }
 #endif

 static int osd_write_videomem(unsigned screen, unsigned offset,
 	u16 *data, size_t charcount)
 {
 	struct ihs_fpga *fpga =
 		(struct ihs_fpga *) CONFIG_SYS_FPGA_BASE(screen);
 	unsigned int k;

 	for (k = 0; k < charcount; ++k) {
 		if (offset + k >= BUFSIZE)
 			return -1;
 		out_le16(&fpga->videomem + offset + k, data[k]);
 	}

 	return charcount;
 }

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

 	for (screen = 0; screen < CONFIG_SYS_OSD_SCREENS; ++screen) {
 		unsigned x;
 		unsigned y;
 		unsigned charcount;
 		unsigned len;
 		u8 color;
 		unsigned int k;
 		u16 buf[BUFSIZE];
 		char *text;
 		int res;

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

 		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;
 	}

 	return 0;
 }

 int osd_probe(unsigned screen)
 {
 	struct ihs_fpga *fpga = (struct ihs_fpga *)CONFIG_SYS_FPGA_BASE(screen);
 	struct ihs_osd *osd = &fpga->osd;
 	u16 version = in_le16(&osd->version);
 	u16 features = in_le16(&osd->features);
 	unsigned width;
 	unsigned height;
 	u8 value;

 	width = ((features & 0x3f00) >> 8) + 1;
 	height = (features & 0x001f) + 1;

 	printf("OSD%d:  Digital-OSD version %01d.%02d, %d" "x%d characters\n",
 		screen, version/100, version%100, width, height);

 #ifdef CONFIG_SYS_CH7301
 	value = i2c_reg_read(CH7301_I2C_ADDR, CH7301_DID);
 	if (value != 0x17) {
 		printf("       Probing CH7301 failed, DID %02x\n", value);
 		return -1;
 	}
 	i2c_reg_write(CH7301_I2C_ADDR, CH7301_TPCP, 0x08);
 	i2c_reg_write(CH7301_I2C_ADDR, CH7301_TPD, 0x16);
 	i2c_reg_write(CH7301_I2C_ADDR, CH7301_TPF, 0x60);
 	i2c_reg_write(CH7301_I2C_ADDR, CH7301_DC, 0x09);
 	i2c_reg_write(CH7301_I2C_ADDR, CH7301_PM, 0xc0);
 #endif

 #ifdef CONFIG_SYS_MPC92469AC
 	mpc92469ac_set(screen, PIXCLK_640_480_60);
 #endif

 #ifdef CONFIG_SYS_ICS8N3QV01
 	ics8n3qv01_set(screen, PIXCLK_640_480_60);
 #endif

 #ifdef CONFIG_SYS_SIL1178
 	value = fpga_iic_read(screen, SIL1178_SLAVE_I2C_ADDRESS, 0x02);
 	if (value != 0x06) {
 		printf("       Probing CH7301 SIL1178, DEV_IDL %02x\n", value);
 		return -1;
 	}
 	/* magic initialization sequence adapted from datasheet */
 	fpga_iic_write(screen, SIL1178_SLAVE_I2C_ADDRESS, 0x08, 0x36);
 	fpga_iic_write(screen, SIL1178_MASTER_I2C_ADDRESS, 0x0f, 0x44);
 	fpga_iic_write(screen, SIL1178_MASTER_I2C_ADDRESS, 0x0f, 0x4c);
 	fpga_iic_write(screen, SIL1178_MASTER_I2C_ADDRESS, 0x0e, 0x10);
 	fpga_iic_write(screen, SIL1178_MASTER_I2C_ADDRESS, 0x0a, 0x80);
 	fpga_iic_write(screen, SIL1178_MASTER_I2C_ADDRESS, 0x09, 0x30);
 	fpga_iic_write(screen, SIL1178_MASTER_I2C_ADDRESS, 0x0c, 0x89);
 	fpga_iic_write(screen, SIL1178_MASTER_I2C_ADDRESS, 0x0d, 0x60);
 	fpga_iic_write(screen, SIL1178_MASTER_I2C_ADDRESS, 0x08, 0x36);
 	fpga_iic_write(screen, SIL1178_MASTER_I2C_ADDRESS, 0x08, 0x37);
 #endif

 	out_le16(&fpga->videocontrol, 0x0002);
 	out_le16(&osd->control, 0x0049);

 	out_le16(&osd->xy_size, ((32 - 1) << 8) | (16 - 1));
 	out_le16(&osd->x_pos, 0x007f);
 	out_le16(&osd->y_pos, 0x005f);

 	return 0;
 }

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

 	for (screen = 0; screen < CONFIG_SYS_OSD_SCREENS; ++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 ((argc < 4) || (strlen(argv[3]) % 4)) {
 			cmd_usage(cmdtp);
 			return 1;
 		}

 		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);
 		}
 	}

 	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"
 );
	/*
	* (C) Copyright 2010
	* Dirk Eibach, Guntermann & Drunck GmbH, eibach@gdsys.de
	*
	* See file CREDITS for list of people who contributed to this
	* project.
	*
	* This program is free software; you can redistribute it and/or
	* modify it under the terms of the GNU General Public License as
	* published by the Free Software Foundation; either version 2 of
	* the License, or (at your option) any later version.
	*
	* This program is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	* GNU General Public License for more details.
	*
	* You should have received a copy of the GNU General Public License
	* along with this program; if not, write to the Free Software
	* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
	* MA 02111-1307 USA
	*/

	#include <common.h>
	#include <i2c.h>
	#include <asm/io.h>

	#include <gdsys_fpga.h>

	#define CH7301_I2C_ADDR 0x75

	#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 BASE_WIDTH 32
	#define BASE_HEIGHT 16
	#define BUFSIZE (BASE_WIDTH * BASE_HEIGHT)

	enum {
	CH7301_CM = 0x1c, /* Clock Mode Register */
	CH7301_IC = 0x1d, /* Input Clock Register */
	CH7301_GPIO = 0x1e, /* GPIO Control Register */
	CH7301_IDF = 0x1f, /* Input Data Format Register */
	CH7301_CD = 0x20, /* Connection Detect Register */
	CH7301_DC = 0x21, /* DAC Control Register */
	CH7301_HPD = 0x23, /* Hot Plug Detection Register */
	CH7301_TCTL = 0x31, /* DVI Control Input Register */
	CH7301_TPCP = 0x33, /* DVI PLL Charge Pump Ctrl Register */
	CH7301_TPD = 0x34, /* DVI PLL Divide Register */
	CH7301_TPVT = 0x35, /* DVI PLL Supply Control Register */
	CH7301_TPF = 0x36, /* DVI PLL Filter Register */
	CH7301_TCT = 0x37, /* DVI Clock Test Register */
	CH7301_TSTP = 0x48, /* Test Pattern Register */
	CH7301_PM = 0x49, /* Power Management register */
	CH7301_VID = 0x4a, /* Version ID Register */
	CH7301_DID = 0x4b, /* Device ID Register */
	CH7301_DSP = 0x56, /* DVI Sync polarity Register */
	};

	#if defined(CONFIG_SYS_ICS8N3QV01) \|\| defined(CONFIG_SYS_SIL1178)
	static void fpga_iic_write(unsigned screen, u8 slave, u8 reg, u8 data)
	{
	struct ihs_fpga fpga = (struct ihs_fpga )CONFIG_SYS_FPGA_BASE(screen);
	struct ihs_i2c *i2c = &fpga->i2c;

	while (in_le16(&fpga->extended_interrupt) & (1 << 12))
	;
	out_le16(&i2c->write_mailbox_ext, reg \| (data << 8));
	out_le16(&i2c->write_mailbox, 0xc400 \| (slave << 1));
	}

	static u8 fpga_iic_read(unsigned screen, u8 slave, u8 reg)
	{
	struct ihs_fpga fpga = (struct ihs_fpga )CONFIG_SYS_FPGA_BASE(screen);
	struct ihs_i2c *i2c = &fpga->i2c;
	unsigned int ctr = 0;

	while (in_le16(&fpga->extended_interrupt) & (1 << 12))
	;
	out_le16(&fpga->extended_interrupt, 1 << 14);
	out_le16(&i2c->write_mailbox_ext, reg);
	out_le16(&i2c->write_mailbox, 0xc000 \| (slave << 1));
	while (!(in_le16(&fpga->extended_interrupt) & (1 << 14))) {
	udelay(100000);
	if (ctr++ > 5) {
	printf("iic receive timeout\n");
	break;
	}
	}
	return in_le16(&i2c->read_mailbox_ext) >> 8;
	}
	#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)
	{
	struct ihs_fpga fpga = (struct ihs_fpga )CONFIG_SYS_FPGA_BASE(screen);
	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;
	}

	out_le16(&fpga->mpc3w_control, (bitval << 9) \| m);
	}
	#endif

	#ifdef CONFIG_SYS_ICS8N3QV01

	static unsigned int ics8n3qv01_get_fout_calc(unsigned screen, 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 = fpga_iic_read(screen, ICS8N3QV01_I2C_ADDR, 0 + index);
	reg_b = fpga_iic_read(screen, ICS8N3QV01_I2C_ADDR, 4 + index);
	reg_c = fpga_iic_read(screen, ICS8N3QV01_I2C_ADDR, 8 + index);
	reg_d = fpga_iic_read(screen, ICS8N3QV01_I2C_ADDR, 12 + index);
	reg_f = fpga_iic_read(screen, 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 screen, 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(screen, 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 = fpga_iic_read(screen, ICS8N3QV01_I2C_ADDR, 0) & 0xc0;
	reg0 \|= (mint & 0x1f) << 1;
	reg0 \|= (mfrac >> 17) & 0x01;
	fpga_iic_write(screen, ICS8N3QV01_I2C_ADDR, 0, reg0);

	reg4 = mfrac >> 9;
	fpga_iic_write(screen, ICS8N3QV01_I2C_ADDR, 4, reg4);

	reg8 = mfrac >> 1;
	fpga_iic_write(screen, ICS8N3QV01_I2C_ADDR, 8, reg8);

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

	reg18 = fpga_iic_read(screen, ICS8N3QV01_I2C_ADDR, 18) & 0x03;
	reg18 \|= 0x20;
	fpga_iic_write(screen, ICS8N3QV01_I2C_ADDR, 18, reg18);

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

	static int osd_write_videomem(unsigned screen, unsigned offset,
	u16 *data, size_t charcount)
	{
	struct ihs_fpga *fpga =
	(struct ihs_fpga *) CONFIG_SYS_FPGA_BASE(screen);
	unsigned int k;

	for (k = 0; k < charcount; ++k) {
	if (offset + k >= BUFSIZE)
	return -1;
	out_le16(&fpga->videomem + offset + k, data[k]);
	}

	return charcount;
	}

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

	for (screen = 0; screen < CONFIG_SYS_OSD_SCREENS; ++screen) {
	unsigned x;
	unsigned y;
	unsigned charcount;
	unsigned len;
	u8 color;
	unsigned int k;
	u16 buf[BUFSIZE];
	char *text;
	int res;

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

	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;
	}

	return 0;
	}

	int osd_probe(unsigned screen)
	{
	struct ihs_fpga fpga = (struct ihs_fpga )CONFIG_SYS_FPGA_BASE(screen);
	struct ihs_osd *osd = &fpga->osd;
	u16 version = in_le16(&osd->version);
	u16 features = in_le16(&osd->features);
	unsigned width;
	unsigned height;
	u8 value;

	width = ((features & 0x3f00) >> 8) + 1;
	height = (features & 0x001f) + 1;

	printf("OSD%d: Digital-OSD version %01d.%02d, %d" "x%d characters\n",
	screen, version/100, version%100, width, height);

	#ifdef CONFIG_SYS_CH7301
	value = i2c_reg_read(CH7301_I2C_ADDR, CH7301_DID);
	if (value != 0x17) {
	printf(" Probing CH7301 failed, DID %02x\n", value);
	return -1;
	}
	i2c_reg_write(CH7301_I2C_ADDR, CH7301_TPCP, 0x08);
	i2c_reg_write(CH7301_I2C_ADDR, CH7301_TPD, 0x16);
	i2c_reg_write(CH7301_I2C_ADDR, CH7301_TPF, 0x60);
	i2c_reg_write(CH7301_I2C_ADDR, CH7301_DC, 0x09);
	i2c_reg_write(CH7301_I2C_ADDR, CH7301_PM, 0xc0);
	#endif

	#ifdef CONFIG_SYS_MPC92469AC
	mpc92469ac_set(screen, PIXCLK_640_480_60);
	#endif

	#ifdef CONFIG_SYS_ICS8N3QV01
	ics8n3qv01_set(screen, PIXCLK_640_480_60);
	#endif

	#ifdef CONFIG_SYS_SIL1178
	value = fpga_iic_read(screen, SIL1178_SLAVE_I2C_ADDRESS, 0x02);
	if (value != 0x06) {
	printf(" Probing CH7301 SIL1178, DEV_IDL %02x\n", value);
	return -1;
	}
	/* magic initialization sequence adapted from datasheet */
	fpga_iic_write(screen, SIL1178_SLAVE_I2C_ADDRESS, 0x08, 0x36);
	fpga_iic_write(screen, SIL1178_MASTER_I2C_ADDRESS, 0x0f, 0x44);
	fpga_iic_write(screen, SIL1178_MASTER_I2C_ADDRESS, 0x0f, 0x4c);
	fpga_iic_write(screen, SIL1178_MASTER_I2C_ADDRESS, 0x0e, 0x10);
	fpga_iic_write(screen, SIL1178_MASTER_I2C_ADDRESS, 0x0a, 0x80);
	fpga_iic_write(screen, SIL1178_MASTER_I2C_ADDRESS, 0x09, 0x30);
	fpga_iic_write(screen, SIL1178_MASTER_I2C_ADDRESS, 0x0c, 0x89);
	fpga_iic_write(screen, SIL1178_MASTER_I2C_ADDRESS, 0x0d, 0x60);
	fpga_iic_write(screen, SIL1178_MASTER_I2C_ADDRESS, 0x08, 0x36);
	fpga_iic_write(screen, SIL1178_MASTER_I2C_ADDRESS, 0x08, 0x37);
	#endif

	out_le16(&fpga->videocontrol, 0x0002);
	out_le16(&osd->control, 0x0049);

	out_le16(&osd->xy_size, ((32 - 1) << 8) \| (16 - 1));
	out_le16(&osd->x_pos, 0x007f);
	out_le16(&osd->y_pos, 0x005f);

	return 0;
	}

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

	for (screen = 0; screen < CONFIG_SYS_OSD_SCREENS; ++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 ((argc < 4) \|\| (strlen(argv[3]) % 4)) {
	cmd_usage(cmdtp);
	return 1;
	}

	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);
	}
	}

	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"
	);