nios: Move cpu/nios/* to arch/nios/cpu/*

Signed-off-by: Peter Tyser <ptyser@xes-inc.com>

1 files changed, 695 insertions, 0 deletions

diff --git a/arch/nios/cpu/asmi.c b/arch/nios/cpu/asmi.c
new file mode 100644
index 0000000..33553b7
--- /dev/null
+++ b/arch/nios/cpu/asmi.c
@@ -0,0 +1,695 @@
+/*
+ * (C) Copyright 2003, Psyent Corporation <www.psyent.com>
+ * Scott McNutt <smcnutt@psyent.com>
+ *
+ * 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>
+
+#if defined(CONFIG_NIOS_ASMI)
+#include <command.h>
+#include <nios-io.h>
+
+#if !defined(CONFIG_SYS_NIOS_ASMIBASE)
+#error "*** CONFIG_SYS_NIOS_ASMIBASE not defined ***"
+#endif
+
+/*-----------------------------------------------------------------------*/
+#define SHORT_HELP\
+	"asmi    - read/write Cyclone ASMI configuration device.\n"
+
+#define LONG_HELP\
+	"\n"\
+	"asmi erase start [end]\n"\
+	"    - erase sector start or sectors start through end.\n"\
+	"asmi info\n"\
+	"    - display ASMI device information.\n"\
+	"asmi protect on | off\n"\
+	"    - turn device protection on or off.\n"\
+	"asmi read addr offset count\n"\
+	"    - read count bytes from offset to addr.\n"\
+	"asmi write addr offset count\n"\
+	"    - write count bytes to offset from addr.\n"\
+	"asmi verify addr offset count\n"\
+	"    - verify count bytes at offset from addr."
+
+
+/*-----------------------------------------------------------------------*/
+/* Operation codes for serial configuration devices
+ */
+#define ASMI_WRITE_ENA		0x06	/* Write enable */
+#define ASMI_WRITE_DIS		0x04	/* Write disable */
+#define ASMI_READ_STAT		0x05	/* Read status */
+#define ASMI_READ_BYTES		0x03	/* Read bytes */
+#define ASMI_READ_ID		0xab	/* Read silicon id */
+#define ASMI_WRITE_STAT		0x01	/* Write status */
+#define ASMI_WRITE_BYTES	0x02	/* Write bytes */
+#define ASMI_ERASE_BULK		0xc7	/* Erase entire device */
+#define ASMI_ERASE_SECT		0xd8	/* Erase sector */
+
+/* Device status register bits
+ */
+#define ASMI_STATUS_WIP		(1<<0)	/* Write in progress */
+#define ASMI_STATUS_WEL		(1<<1)	/* Write enable latch */
+
+static nios_asmi_t *asmi = (nios_asmi_t *)CONFIG_SYS_NIOS_ASMIBASE;
+
+/***********************************************************************
+ * Device access
+ ***********************************************************************/
+static void asmi_cs (int assert)
+{
+	if (assert) {
+		asmi->control |= NIOS_ASMI_SSO;
+	} else {
+		/* Let all bits shift out */
+		while ((asmi->status & NIOS_ASMI_TMT) == 0)
+			;
+		asmi->control &= ~NIOS_ASMI_SSO;
+	}
+}
+
+static void asmi_tx (unsigned char c)
+{
+	while ((asmi->status & NIOS_ASMI_TRDY) == 0)
+		;
+	asmi->txdata = c;
+}
+
+static int asmi_rx (void)
+{
+	while ((asmi->status & NIOS_ASMI_RRDY) == 0)
+		;
+	return (asmi->rxdata);
+}
+
+static unsigned char bitrev[] = {
+	0x00, 0x08, 0x04, 0x0c, 0x02, 0x0a, 0x06, 0x0e,
+	0x01, 0x09, 0x05, 0x0d, 0x03, 0x0b, 0x07, 0x0f
+};
+
+static unsigned char asmi_bitrev( unsigned char c )
+{
+	unsigned char val;
+
+	val  = bitrev[c>>4];
+	val |= bitrev[c & 0x0f]<<4;
+	return (val);
+}
+
+static void asmi_rcv (unsigned char *dst, int len)
+{
+	while (len--) {
+		asmi_tx (0);
+		*dst++ = asmi_rx ();
+	}
+}
+
+static void asmi_rrcv (unsigned char *dst, int len)
+{
+	while (len--) {
+		asmi_tx (0);
+		*dst++ = asmi_bitrev (asmi_rx ());
+	}
+}
+
+static void asmi_snd (unsigned char *src, int len)
+{
+	while (len--) {
+		asmi_tx (*src++);
+		asmi_rx ();
+	}
+}
+
+static void asmi_rsnd (unsigned char *src, int len)
+{
+	while (len--) {
+		asmi_tx (asmi_bitrev (*src++));
+		asmi_rx ();
+	}
+}
+
+static void asmi_wr_enable (void)
+{
+	asmi_cs (1);
+	asmi_tx (ASMI_WRITE_ENA);
+	asmi_rx ();
+	asmi_cs (0);
+}
+
+static unsigned char asmi_status_rd (void)
+{
+	unsigned char status;
+
+	asmi_cs (1);
+	asmi_tx (ASMI_READ_STAT);
+	asmi_rx ();
+	asmi_tx (0);
+	status = asmi_rx ();
+	asmi_cs (0);
+	return (status);
+}
+
+static void asmi_status_wr (unsigned char status)
+{
+	asmi_wr_enable ();
+	asmi_cs (1);
+	asmi_tx (ASMI_WRITE_STAT);
+	asmi_rx ();
+	asmi_tx (status);
+	asmi_rx ();
+	asmi_cs (0);
+	return;
+}
+
+/***********************************************************************
+ * Device information
+ ***********************************************************************/
+typedef struct asmi_devinfo_t {
+	const char	*name;		/* Device name */
+	unsigned char	id;		/* Device silicon id */
+	unsigned char	size;		/* Total size log2(bytes)*/
+	unsigned char	num_sects;	/* Number of sectors */
+	unsigned char	sz_sect;	/* Sector size log2(bytes) */
+	unsigned char	sz_page;	/* Page size log2(bytes) */
+	unsigned char   prot_mask;	/* Protection mask */
+}asmi_devinfo_t;
+
+static struct asmi_devinfo_t devinfo[] = {
+	{ "EPCS1 ", 0x10, 17, 4, 15, 8, 0x0c },
+	{ "EPCS4 ", 0x12, 19, 8, 16, 8, 0x1c },
+	{ 0, 0, 0, 0, 0, 0 }
+};
+
+static asmi_devinfo_t *asmi_dev_find (void)
+{
+	unsigned char buf[4];
+	unsigned char id;
+	int i;
+	struct asmi_devinfo_t *dev = NULL;
+
+	/* Read silicon id requires 3 "dummy bytes" before it's put
+	 * on the wire.
+	 */
+	buf[0] = ASMI_READ_ID;
+	buf[1] = 0;
+	buf[2] = 0;
+	buf[3] = 0;
+
+	asmi_cs (1);
+	asmi_snd (buf,4);
+	asmi_rcv (buf,1);
+	asmi_cs (0);
+	id = buf[0];
+
+	/* Find the info struct */
+	i = 0;
+	while (devinfo[i].name) {
+		if (id == devinfo[i].id) {
+			dev = &devinfo[i];
+			break;
+		}
+		i++;
+	}
+
+	return (dev);
+}
+
+/***********************************************************************
+ * Misc Utilities
+ ***********************************************************************/
+static unsigned asmi_cfgsz (void)
+{
+	unsigned sz = 0;
+	unsigned char buf[128];
+	unsigned char *p;
+
+	/* Read in the first 128 bytes of the device */
+	buf[0] = ASMI_READ_BYTES;
+	buf[1] = 0;
+	buf[2] = 0;
+	buf[3] = 0;
+
+	asmi_cs (1);
+	asmi_snd (buf,4);
+	asmi_rrcv (buf, sizeof(buf));
+	asmi_cs (0);
+
+	/* Search for the starting 0x6a which is followed by the
+	 * 4-byte 'register' and 4-byte bit-count.
+	 */
+	p = buf;
+	while (p < buf + sizeof(buf)-8) {
+		if ( *p == 0x6a ) {
+			/* Point to bit count and extract */
+			p += 5;
+			sz = *p++;
+			sz |= *p++ << 8;
+			sz |= *p++ << 16;
+			sz |= *p++ << 24;
+			/* Convert to byte count */
+			sz += 7;
+			sz >>= 3;
+		} else if (*p == 0xff) {
+			/* 0xff is ok ... just skip */
+			p++;
+			continue;
+		} else {
+			/* Not 0xff or 0x6a ... something's not
+			 * right ... report 'unknown' (sz=0).
+			 */
+			break;
+		}
+	}
+	return (sz);
+}
+
+static int asmi_erase (unsigned start, unsigned end)
+{
+	unsigned off, sectsz;
+	unsigned char buf[4];
+	struct asmi_devinfo_t *dev = asmi_dev_find ();
+
+	if (!dev || (start>end))
+		return (-1);
+
+	/* Erase the requested sectors. An address is required
+	 * that lies within the requested sector -- we'll just
+	 * use the first address in the sector.
+	 */
+	printf ("asmi erasing sector %d ", start);
+	if (start != end)
+		printf ("to %d ", end);
+	sectsz = (1 << dev->sz_sect);
+	while (start <= end) {
+		off = start * sectsz;
+		start++;
+
+		buf[0] = ASMI_ERASE_SECT;
+		buf[1] = off >> 16;
+		buf[2] = off >> 8;
+		buf[3] = off;
+
+		asmi_wr_enable ();
+		asmi_cs (1);
+		asmi_snd (buf,4);
+		asmi_cs (0);
+
+		printf ("."); /* Some user feedback */
+
+		/* Wait for erase to complete */
+		while (asmi_status_rd() & ASMI_STATUS_WIP)
+			;
+	}
+	printf (" done.\n");
+	return (0);
+}
+
+static int asmi_read (ulong addr, ulong off, ulong cnt)
+{
+	unsigned char buf[4];
+
+	buf[0] = ASMI_READ_BYTES;
+	buf[1] = off >> 16;
+	buf[2] = off >> 8;
+	buf[3] = off;
+
+	asmi_cs (1);
+	asmi_snd (buf,4);
+	asmi_rrcv ((unsigned char *)addr, cnt);
+	asmi_cs (0);
+
+	return (0);
+}
+
+static
+int asmi_write (ulong addr, ulong off, ulong cnt)
+{
+	ulong wrcnt;
+	unsigned pgsz;
+	unsigned char buf[4];
+	struct asmi_devinfo_t *dev = asmi_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] = ASMI_WRITE_BYTES;
+		buf[1] = off >> 16;
+		buf[2] = off >> 8;
+		buf[3] = off;
+
+		asmi_wr_enable ();
+		asmi_cs (1);
+		asmi_snd (buf,4);
+		asmi_rsnd ((unsigned char *)addr, wrcnt);
+		asmi_cs (0);
+
+		/* Wait for write to complete */
+		while (asmi_status_rd() & ASMI_STATUS_WIP)
+			;
+
+		cnt -= wrcnt;
+		off += wrcnt;
+		addr += wrcnt;
+	}
+
+	return (0);
+}
+
+static
+int asmi_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;
+		asmi_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 asmi_sect_erased (int sect, unsigned *offset,
+		struct asmi_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) {
+		asmi_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
+ ***********************************************************************/
+static
+void do_asmi_info (struct asmi_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 = asmi_status_rd();
+	printf ("status: 0x%02x (WIP:%d, WEL:%d, PROT:%s)\n",
+		stat,
+		(stat & ASMI_STATUS_WIP) ? 1 : 0,
+	        (stat & ASMI_STATUS_WEL) ? 1 : 0,
+		(stat & dev->prot_mask) ? "on" : "off" );
+
+	/* Configuration  */
+	tmp = asmi_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 = asmi_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;
+}
+
+static
+void do_asmi_erase (struct asmi_devinfo_t *dev, int argc, char *argv[])
+{
+	unsigned start,end;
+
+	if ((argc < 3) || (argc > 4)) {
+		printf ("USAGE: asmi erase sect [end]\n");
+		return;
+	}
+	if ((asmi_status_rd() & dev->prot_mask) != 0) {
+		printf ( "asmi: 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 ("asmi: invalid sector range: [%d:%d]\n",
+			start, end );
+		return;
+	}
+
+	asmi_erase (start, end);
+
+	return;
+}
+
+static
+void do_asmi_protect (struct asmi_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: asmi 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 = asmi_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 ("asmi: unknown protection: %s\n", argv[2]);
+		return;
+	}
+	asmi_status_wr (stat);
+	return;
+}
+
+static
+void do_asmi_read (struct asmi_devinfo_t *dev, int argc, char *argv[])
+{
+	ulong addr,off,cnt;
+	ulong sz;
+
+	if (argc < 5) {
+		printf ("USAGE: asmi 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 ("asmi: read %08lx <- %06lx (0x%lx bytes)\n",
+			addr, off, cnt);
+	asmi_read (addr, off, cnt);
+
+	return;
+}
+
+static
+void do_asmi_write (struct asmi_devinfo_t *dev, int argc, char *argv[])
+{
+	ulong addr,off,cnt;
+	ulong sz;
+	ulong err;
+
+	if (argc < 5) {
+		printf ("USAGE: asmi write addr offset count\n");
+		return;
+	}
+	if ((asmi_status_rd() & dev->prot_mask) != 0) {
+		printf ( "asmi: 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 ("asmi: write %08lx -> %06lx (0x%lx bytes)\n",
+			addr, off, cnt);
+	asmi_write (addr, off, cnt);
+	if (asmi_verify (addr, off, cnt, &err) != 0)
+		printf ("asmi: write error at offset %06lx\n", err);
+
+	return;
+}
+
+static
+void do_asmi_verify (struct asmi_devinfo_t *dev, int argc, char *argv[])
+{
+	ulong addr,off,cnt;
+	ulong sz;
+	ulong err;
+
+	if (argc < 5) {
+		printf ("USAGE: asmi 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 ("asmi: verify %08lx -> %06lx (0x%lx bytes)\n",
+			addr, off, cnt);
+	if (asmi_verify (addr, off, cnt, &err) != 0)
+		printf ("asmi: verify error at offset %06lx\n", err);
+
+	return;
+}
+
+/*-----------------------------------------------------------------------*/
+int do_asmi (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
+{
+	int len;
+	struct asmi_devinfo_t *dev = asmi_dev_find ();
+
+	if (argc < 2) {
+		printf ("Usage:%s", LONG_HELP);
+		return (0);
+	}
+
+	if (!dev) {
+		printf ("asmi: device not found.\n");
+		return (0);
+	}
+
+	len = strlen (argv[1]);
+	if (strncmp ("info", argv[1], len) == 0) {
+		do_asmi_info ( dev, argc, argv);
+	} else if (strncmp ("erase", argv[1], len) == 0) {
+		do_asmi_erase (dev, argc, argv);
+	} else if (strncmp ("protect", argv[1], len) == 0) {
+		do_asmi_protect (dev, argc, argv);
+	} else if (strncmp ("read", argv[1], len) == 0) {
+		do_asmi_read (dev, argc, argv);
+	} else if (strncmp ("write", argv[1], len) == 0) {
+		do_asmi_write (dev, argc, argv);
+	} else if (strncmp ("verify", argv[1], len) == 0) {
+		do_asmi_verify (dev, argc, argv);
+	} else {
+		printf ("asmi: unknown operation: %s\n", argv[1]);
+	}
+
+	return (0);
+}
+
+/*-----------------------------------------------------------------------*/
+
+
+U_BOOT_CMD( asmi, 5, 0, do_asmi, SHORT_HELP, LONG_HELP );
+
+#endif /* CONFIG_NIOS_ASMI */