/* * (C) Copyright 2000, 2001 * Wolfgang Denk, DENX Software Engineering, wd@denx.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 <armboot.h>#include <config.h>#include <command.h>#if (CONFIG_COMMANDS & CFG_CMD_EEPROM) || defined(CFG_ENV_IS_IN_EEPROM)extern void eeprom_init  (void);extern void eeprom_read  (unsigned offset, uchar *buffer, unsigned cnt);extern void eeprom_write (unsigned offset, uchar *buffer, unsigned cnt);#endif/* ------------------------------------------------------------------------- */#if (CONFIG_COMMANDS & CFG_CMD_EEPROM)int do_eeprom (cmd_tbl_t *cmdtp, bd_t *bd, int flag, int argc, char *argv[]){    switch (argc) {    case 5:	/* 4 args */	if (strcmp(argv[1],"read") == 0) {		ulong addr = simple_strtoul(argv[2], NULL, 16);		ulong off  = simple_strtoul(argv[3], NULL, 16);		ulong cnt  = simple_strtoul(argv[4], NULL, 16);		printf ("\nEEPROM read: addr %08lx  off %04lx  count %ld ... ",			addr, off, cnt);#ifndef CONFIG_SPI		eeprom_init ();#endif		eeprom_read (off, (uchar *)addr, cnt);		printf ("done\n");		return 0;	} else if (strcmp(argv[1],"write") == 0) {		ulong addr = simple_strtoul(argv[2], NULL, 16);		ulong off  = simple_strtoul(argv[3], NULL, 16);		ulong cnt  = simple_strtoul(argv[4], NULL, 16);		printf ("\nEEPROM write: addr %08lx  off %04lx  count %ld ... ",			addr, off, cnt);#ifndef CONFIG_SPI		eeprom_init ();#endif		eeprom_write(off, (uchar *)addr, cnt);		printf ("done\n");		return 0;	}    }    printf ("Usage:\n%s\n", cmdtp->usage);    return 1;}#endif	/* CFG_CMD_EEPROM *//*----------------------------------------------------------------------- * * for CONFIG_I2C_X defined (16-bit EEPROM address) offset is *   0x000nxxxx for EEPROM address selectors at n, offset xxxx in EEPROM. * * for CONFIG_I2C_X not defined (8-bit EEPROM page address) offset is *   0x00000nxx for EEPROM address selectors and page number at n. */#if (CONFIG_COMMANDS & CFG_CMD_EEPROM) || defined(CFG_ENV_IS_IN_EEPROM)void eeprom_read (unsigned offset, uchar *buffer, unsigned cnt){	unsigned end = offset + cnt;	unsigned blk_off;	/* Read data until done or would cross a page boundary.	 * We must write the address again when changing pages	 * because the next page may be in a different device.	 */	while (offset < end) {		unsigned alen, len, maxlen;#if !defined(CONFIG_I2C_X) && !defined(CONFIG_SPI_X)		uchar addr[2];		blk_off = offset & 0xFF;	/* block offset */		addr[0] = offset >> 8;		/* block number */		addr[1] = blk_off;		/* block offset */		alen	= 2;#else		uchar addr[3];		blk_off = offset & 0xFF;	/* block offset */		addr[0] = offset >> 16;		/* block number */		addr[1] = offset >>  8;		/* upper address octet */		addr[2] = blk_off;		/* lower address octet */		alen	= 3;#endif	/* CONFIG_I2C_X, CONFIG_SPI_X */#ifdef CFG_I2C_EEPROM_ADDR		addr[0] |= CFG_I2C_EEPROM_ADDR;	/* insert device address */#endif		maxlen = 0x100 - blk_off;		if (maxlen > I2C_RXTX_LEN)			maxlen = I2C_RXTX_LEN;		len    = end - offset;		if (len > maxlen)			len = maxlen;#ifdef CONFIG_SPI		spi_read (addr, alen, buffer, len);#else		i2c_read (addr, alen, buffer, len);#endif		buffer += len;		offset += len;	}}/*----------------------------------------------------------------------- * * for CONFIG_I2C_X defined (16-bit EEPROM address) offset is *   0x000nxxxx for EEPROM address selectors at n, offset xxxx in EEPROM. * * for CONFIG_I2C_X not defined (8-bit EEPROM page address) offset is *   0x00000nxx for EEPROM address selectors and page number at n. */void eeprom_write (unsigned offset, uchar *buffer, unsigned cnt){	unsigned end = offset + cnt;	unsigned blk_off;	/* Write data until done or would cross a write page boundary.	 * We must write the address again when changing pages	 * because the address counter only increments within a page.	 */	while (offset < end) {		unsigned alen, len, maxlen;#if !defined(CONFIG_I2C_X) && !defined(CONFIG_SPI_X)		uchar addr[2];		blk_off = offset & 0xFF;	/* block offset */		addr[0] = offset >> 8;		/* block number */		addr[1] = blk_off;		/* block offset */		alen	= 2;#else		uchar addr[3];		blk_off = offset & 0xFF;	/* block offset */		addr[0] = offset >> 16;		/* block number */		addr[1] = offset >>  8;		/* upper address octet */		addr[2] = blk_off;		/* lower address octet */		alen	= 3;#endif	/* CONFIG_I2C_X, CONFIG_SPI_X */#ifdef CFG_I2C_EEPROM_ADDR		addr[0] |= CFG_I2C_EEPROM_ADDR;	/* insert device address */#endif#if defined(CFG_EEPROM_PAGE_WRITE_BITS)#define	EEPROM_PAGE_SIZE	(1 << CFG_EEPROM_PAGE_WRITE_BITS)#define	EEPROM_PAGE_OFFSET(x)	((x) & (EEPROM_PAGE_SIZE - 1))		maxlen = EEPROM_PAGE_SIZE - EEPROM_PAGE_OFFSET(blk_off);#else		maxlen = 0x100 - blk_off;#endif		if (maxlen > I2C_RXTX_LEN)			maxlen = I2C_RXTX_LEN;		len = end - offset;		if (len > maxlen)			len = maxlen;#ifdef CONFIG_SPI		spi_write (addr, alen, buffer, len);#else		i2c_write (addr, alen, buffer, len);#endif		buffer += len;		offset += len;#if defined(CFG_EEPROM_PAGE_WRITE_DELAY_MS)		udelay(CFG_EEPROM_PAGE_WRITE_DELAY_MS * 1000);#endif	}}/*----------------------------------------------------------------------- * Set default values */#ifndef	CFG_I2C_SPEED#define	CFG_I2C_SPEED	50000#endif#ifndef	CFG_I2C_SLAVE#define	CFG_I2C_SLAVE	0xFE#endifvoid eeprom_init  (void){#if defined(CONFIG_8xx) || defined(CONFIG_8260)# if defined(CONFIG_SPI)	spi_init_f ();# else	i2c_init (CFG_I2C_SPEED, CFG_I2C_SLAVE);# endif#endif}/*----------------------------------------------------------------------- */#endif	/* CFG_CMD_EEPROM */