+++ /dev/null
-/*
- * (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 */
projects / u-boot / blobdiff