return (0);}int epcs_write (ulong addr, ulong off, ulong cnt){	ulong wrcnt;	unsigned pgsz;	unsigned char buf[4];	struct epcs_devinfo_t *dev = epcs_dev_find ();	if (!dev)		return (-1);	pgsz = (1<<dev->sz_page);	while (cnt) {		if (off % pgsz)			wrcnt = pgsz - (off % pgsz);		else			wrcnt = pgsz;		wrcnt = (wrcnt > cnt) ? cnt : wrcnt;		buf[0] = EPCS_WRITE_BYTES;		buf[1] = off >> 16;		buf[2] = off >> 8;		buf[3] = off;		epcs_wr_enable ();		epcs_cs (1);		epcs_snd (buf,4);		epcs_rsnd ((unsigned char *)addr, wrcnt);		epcs_cs (0);		/* Wait for write to complete */		while (epcs_status_rd() & EPCS_STATUS_WIP)			;		cnt -= wrcnt;		off += wrcnt;		addr += wrcnt;	}	return (0);}int epcs_verify (ulong addr, ulong off, ulong cnt, ulong *err){	ulong rdcnt;	unsigned char buf[256];	unsigned char *start,*end;	int i;	start = end = (unsigned char *)addr;	while (cnt) {		rdcnt = (cnt>sizeof(buf)) ? sizeof(buf) : cnt;		epcs_read ((ulong)buf, off, rdcnt);		for (i=0; i<rdcnt; i++) {			if (*end != buf[i]) {				*err = end - start;				return(-1);			}			end++;		}		cnt -= rdcnt;		off += rdcnt;	}	return (0);}static int epcs_sect_erased (int sect, unsigned *offset,		struct epcs_devinfo_t *dev){	unsigned char buf[128];	unsigned off, end;	unsigned sectsz;	int i;	sectsz = (1 << dev->sz_sect);	off = sectsz * sect;	end = off + sectsz;	while (off < end) {		epcs_read ((ulong)buf, off, sizeof(buf));		for (i=0; i < sizeof(buf); i++) {			if (buf[i] != 0xff) {				*offset = off + i;				return (0);			}		}		off += sizeof(buf);	}	return (1);}/*********************************************************************** * Commands ***********************************************************************/staticvoid do_epcs_info (struct epcs_devinfo_t *dev, int argc, char *argv[]){	int i;	unsigned char stat;	unsigned tmp;	int erased;	/* Basic device info */	printf ("%s: %d kbytes (%d sectors x %d kbytes,"		" %d bytes/page)\n",		dev->name, 1 << (dev->size-10),		dev->num_sects, 1 << (dev->sz_sect-10),		1 << dev->sz_page );	/* Status -- for now protection is all-or-nothing */	stat = epcs_status_rd();	printf ("status: 0x%02x (WIP:%d, WEL:%d, PROT:%s)\n",		stat,		(stat & EPCS_STATUS_WIP) ? 1 : 0,	        (stat & EPCS_STATUS_WEL) ? 1 : 0,		(stat & dev->prot_mask) ? "on" : "off" );	/* Configuration  */	tmp = epcs_cfgsz ();	if (tmp) {		printf ("config: 0x%06x (%d) bytes\n", tmp, tmp );	} else {		printf ("config: unknown\n" );	}	/* Sector info */	for (i=0; i<dev->num_sects; i++) {		erased = epcs_sect_erased (i, &tmp, dev);		printf ("     %d: %06x ",			i, i*(1<<dev->sz_sect) );		if (erased)			printf ("erased\n");		else			printf ("data @ 0x%06x\n", tmp);	}	return;}staticvoid do_epcs_erase (struct epcs_devinfo_t *dev, int argc, char *argv[]){	unsigned start,end;	if ((argc < 3) || (argc > 4)) {		printf ("USAGE: epcs erase sect [end]\n");		return;	}	if ((epcs_status_rd() & dev->prot_mask) != 0) {		printf ( "epcs: device protected.\n");		return;	}	start = simple_strtoul (argv[2], NULL, 10);	if (argc > 3)		end = simple_strtoul (argv[3], NULL, 10);	else		end = start;	if ((start >= dev->num_sects) || (start > end)) {		printf ("epcs: invalid sector range: [%d:%d]\n",			start, end );		return;	}	epcs_erase (start, end);	return;}staticvoid do_epcs_protect (struct epcs_devinfo_t *dev, int argc, char *argv[]){	unsigned char stat;	/* For now protection is all-or-nothing to keep things	 * simple. The protection bits don't map in a linear	 * fashion ... and we would rather protect the bottom	 * of the device since it contains the config data and	 * leave the top unprotected for app use. But unfortunately	 * protection works from top-to-bottom so it does	 * really help very much from a software app point-of-view.	 */	if (argc < 3) {		printf ("USAGE: epcs protect on | off\n");		return;	}	if (!dev)		return;	/* Protection on/off is just a matter of setting/clearing	 * all protection bits in the status register.	 */	stat = epcs_status_rd ();	if (strcmp ("on", argv[2]) == 0) {		stat |= dev->prot_mask;	} else if (strcmp ("off", argv[2]) == 0 ) {		stat &= ~dev->prot_mask;	} else {		printf ("epcs: unknown protection: %s\n", argv[2]);		return;	}	epcs_status_wr (stat);	return;}staticvoid do_epcs_read (struct epcs_devinfo_t *dev, int argc, char *argv[]){	ulong addr,off,cnt;	ulong sz;	if (argc < 5) {		printf ("USAGE: epcs read addr offset count\n");		return;	}	sz = 1 << dev->size;	addr = simple_strtoul (argv[2], NULL, 16);	off  = simple_strtoul (argv[3], NULL, 16);	cnt  = simple_strtoul (argv[4], NULL, 16);	if (off > sz) {		printf ("offset is greater than device size"			"... aborting.\n");		return;	}	if ((off + cnt) > sz) {		printf ("request exceeds device size"			"... truncating.\n");		cnt = sz - off;	}	printf ("epcs: read %08lx <- %06lx (0x%lx bytes)\n",			addr, off, cnt);	epcs_read (addr, off, cnt);	return;}staticvoid do_epcs_write (struct epcs_devinfo_t *dev, int argc, char *argv[]){	ulong addr,off,cnt;	ulong sz;	ulong err;	if (argc < 5) {		printf ("USAGE: epcs write addr offset count\n");		return;	}	if ((epcs_status_rd() & dev->prot_mask) != 0) {		printf ( "epcs: device protected.\n");		return;	}	sz = 1 << dev->size;	addr = simple_strtoul (argv[2], NULL, 16);	off  = simple_strtoul (argv[3], NULL, 16);	cnt  = simple_strtoul (argv[4], NULL, 16);	if (off > sz) {		printf ("offset is greater than device size"			"... aborting.\n");		return;	}	if ((off + cnt) > sz) {		printf ("request exceeds device size"			"... truncating.\n");		cnt = sz - off;	}	printf ("epcs: write %08lx -> %06lx (0x%lx bytes)\n",			addr, off, cnt);	epcs_write (addr, off, cnt);	if (epcs_verify (addr, off, cnt, &err) != 0)		printf ("epcs: write error at offset %06lx\n", err);	return;}staticvoid do_epcs_verify (struct epcs_devinfo_t *dev, int argc, char *argv[]){	ulong addr,off,cnt;	ulong sz;	ulong err;	if (argc < 5) {		printf ("USAGE: epcs verify addr offset count\n");		return;	}	sz = 1 << dev->size;	addr = simple_strtoul (argv[2], NULL, 16);	off  = simple_strtoul (argv[3], NULL, 16);	cnt  = simple_strtoul (argv[4], NULL, 16);	if (off > sz) {		printf ("offset is greater than device size"			"... aborting.\n");		return;	}	if ((off + cnt) > sz) {		printf ("request exceeds device size"			"... truncating.\n");		cnt = sz - off;	}	printf ("epcs: verify %08lx -> %06lx (0x%lx bytes)\n",			addr, off, cnt);	if (epcs_verify (addr, off, cnt, &err) != 0)		printf ("epcs: verify error at offset %06lx\n", err);	return;}/*-----------------------------------------------------------------------*/int do_epcs (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]){	int len;	struct epcs_devinfo_t *dev = epcs_dev_find ();	if (!dev) {		printf ("epcs: device not found.\n");		return (-1);	}	if (argc < 2) {		do_epcs_info (dev, argc, argv);		return (0);	}	len = strlen (argv[1]);	if (strncmp ("info", argv[1], len) == 0) {		do_epcs_info (dev, argc, argv);	} else if (strncmp ("erase", argv[1], len) == 0) {		do_epcs_erase (dev, argc, argv);	} else if (strncmp ("protect", argv[1], len) == 0) {		do_epcs_protect (dev, argc, argv);	} else if (strncmp ("read", argv[1], len) == 0) {		do_epcs_read (dev, argc, argv);	} else if (strncmp ("write", argv[1], len) == 0) {		do_epcs_write (dev, argc, argv);	} else if (strncmp ("verify", argv[1], len) == 0) {		do_epcs_verify (dev, argc, argv);	} else {		printf ("epcs: unknown operation: %s\n", argv[1]);	}	return (0);}/*-----------------------------------------------------------------------*/U_BOOT_CMD( epcs, 5, 0, do_epcs, SHORT_HELP, LONG_HELP );#endif /* CONFIG_NIOS_EPCS */