+++ /dev/null
-/*
- * (C) Copyright 2004, Psyent Corporation <www.psyent.com>
- * Scott McNutt <smcnutt@psyent.com>
- *
- * SPDX-License-Identifier: GPL-2.0+
- */
-
-#include <common.h>
-
-#if defined(CONFIG_SYS_NIOS_EPCSBASE)
-#include <command.h>
-#include <asm/io.h>
-#include <nios2-io.h>
-#include <nios2-epcs.h>
-
-
-/*-----------------------------------------------------------------------*/
-#define SHORT_HELP\
- "epcs - read/write Cyclone EPCS configuration device.\n"
-
-#define LONG_HELP\
- "\n"\
- "epcs erase start [end]\n"\
- " - erase sector start or sectors start through end.\n"\
- "epcs info\n"\
- " - display EPCS device information.\n"\
- "epcs protect on | off\n"\
- " - turn device protection on or off.\n"\
- "epcs read addr offset count\n"\
- " - read count bytes from offset to addr.\n"\
- "epcs write addr offset count\n"\
- " - write count bytes to offset from addr.\n"\
- "epcs verify addr offset count\n"\
- " - verify count bytes at offset from addr."
-
-
-/*-----------------------------------------------------------------------*/
-/* Operation codes for serial configuration devices
- */
-#define EPCS_WRITE_ENA 0x06 /* Write enable */
-#define EPCS_WRITE_DIS 0x04 /* Write disable */
-#define EPCS_READ_STAT 0x05 /* Read status */
-#define EPCS_READ_BYTES 0x03 /* Read bytes */
-#define EPCS_READ_ID 0xab /* Read silicon id */
-#define EPCS_WRITE_STAT 0x01 /* Write status */
-#define EPCS_WRITE_BYTES 0x02 /* Write bytes */
-#define EPCS_ERASE_BULK 0xc7 /* Erase entire device */
-#define EPCS_ERASE_SECT 0xd8 /* Erase sector */
-
-/* Device status register bits
- */
-#define EPCS_STATUS_WIP (1<<0) /* Write in progress */
-#define EPCS_STATUS_WEL (1<<1) /* Write enable latch */
-
-/* Misc
- */
-#define EPCS_TIMEOUT 100 /* 100 msec timeout */
-
-static nios_spi_t *epcs = (nios_spi_t *)CONFIG_SYS_NIOS_EPCSBASE;
-
-/***********************************************************************
- * Device access
- ***********************************************************************/
-static int epcs_cs (int assert)
-{
- ulong start;
- unsigned tmp;
-
-
- if (assert) {
- tmp = readl (&epcs->control);
- writel (tmp | NIOS_SPI_SSO, &epcs->control);
- } else {
- /* Let all bits shift out */
- start = get_timer (0);
- while ((readl (&epcs->status) & NIOS_SPI_TMT) == 0)
- if (get_timer (start) > EPCS_TIMEOUT)
- return (-1);
- tmp = readl (&epcs->control);
- writel (tmp & ~NIOS_SPI_SSO, &epcs->control);
- }
- return (0);
-}
-
-static int epcs_tx (unsigned char c)
-{
- ulong start;
-
- start = get_timer (0);
- while ((readl (&epcs->status) & NIOS_SPI_TRDY) == 0)
- if (get_timer (start) > EPCS_TIMEOUT)
- return (-1);
- writel (c, &epcs->txdata);
- return (0);
-}
-
-static int epcs_rx (void)
-{
- ulong start;
-
- start = get_timer (0);
- while ((readl (&epcs->status) & NIOS_SPI_RRDY) == 0)
- if (get_timer (start) > EPCS_TIMEOUT)
- return (-1);
- return (readl (&epcs->rxdata));
-}
-
-static unsigned char bitrev[] = {
- 0x00, 0x08, 0x04, 0x0c, 0x02, 0x0a, 0x06, 0x0e,
- 0x01, 0x09, 0x05, 0x0d, 0x03, 0x0b, 0x07, 0x0f
-};
-
-static unsigned char epcs_bitrev (unsigned char c)
-{
- unsigned char val;
-
- val = bitrev[c>>4];
- val |= bitrev[c & 0x0f]<<4;
- return (val);
-}
-
-static void epcs_rcv (unsigned char *dst, int len)
-{
- while (len--) {
- epcs_tx (0);
- *dst++ = epcs_rx ();
- }
-}
-
-static void epcs_rrcv (unsigned char *dst, int len)
-{
- while (len--) {
- epcs_tx (0);
- *dst++ = epcs_bitrev (epcs_rx ());
- }
-}
-
-static void epcs_snd (unsigned char *src, int len)
-{
- while (len--) {
- epcs_tx (*src++);
- epcs_rx ();
- }
-}
-
-static void epcs_rsnd (unsigned char *src, int len)
-{
- while (len--) {
- epcs_tx (epcs_bitrev (*src++));
- epcs_rx ();
- }
-}
-
-static void epcs_wr_enable (void)
-{
- epcs_cs (1);
- epcs_tx (EPCS_WRITE_ENA);
- epcs_rx ();
- epcs_cs (0);
-}
-
-static unsigned char epcs_status_rd (void)
-{
- unsigned char status;
-
- epcs_cs (1);
- epcs_tx (EPCS_READ_STAT);
- epcs_rx ();
- epcs_tx (0);
- status = epcs_rx ();
- epcs_cs (0);
- return (status);
-}
-
-static void epcs_status_wr (unsigned char status)
-{
- epcs_wr_enable ();
- epcs_cs (1);
- epcs_tx (EPCS_WRITE_STAT);
- epcs_rx ();
- epcs_tx (status);
- epcs_rx ();
- epcs_cs (0);
- return;
-}
-
-/***********************************************************************
- * Device information
- ***********************************************************************/
-
-static struct epcs_devinfo_t devinfo[] = {
- { "EPCS1 ", 0x10, 17, 4, 15, 8, 0x0c },
- { "EPCS4 ", 0x12, 19, 8, 16, 8, 0x1c },
- { "EPCS16", 0x14, 21, 32, 16, 8, 0x1c },
- { "EPCS64", 0x16, 23,128, 16, 8, 0x1c },
- { 0, 0, 0, 0, 0, 0 }
-};
-
-int epcs_reset (void)
-{
- /* When booting from an epcs controller, the epcs bootrom
- * code may leave the slave select in an asserted state.
- * This causes two problems: (1) The initial epcs access
- * will fail -- not a big deal, and (2) a software reset
- * will cause the bootrom code to hang since it does not
- * ensure the select is negated prior to first access -- a
- * big deal. Here we just negate chip select and everything
- * gets better :-)
- */
- epcs_cs (0); /* Negate chip select */
- return (0);
-}
-
-epcs_devinfo_t *epcs_dev_find (void)
-{
- unsigned char buf[4];
- unsigned char id;
- int i;
- struct epcs_devinfo_t *dev = NULL;
-
- /* Read silicon id requires 3 "dummy bytes" before it's put
- * on the wire.
- */
- buf[0] = EPCS_READ_ID;
- buf[1] = 0;
- buf[2] = 0;
- buf[3] = 0;
-
- epcs_cs (1);
- epcs_snd (buf,4);
- epcs_rcv (buf,1);
- if (epcs_cs (0) == -1)
- return (NULL);
- 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
- ***********************************************************************/
-int epcs_cfgsz (void)
-{
- int sz = 0;
- unsigned char buf[128];
- unsigned char *p;
- struct epcs_devinfo_t *dev = epcs_dev_find ();
-
- if (!dev)
- return (-1);
-
- /* Read in the first 128 bytes of the device */
- buf[0] = EPCS_READ_BYTES;
- buf[1] = 0;
- buf[2] = 0;
- buf[3] = 0;
-
- epcs_cs (1);
- epcs_snd (buf,4);
- epcs_rrcv (buf, sizeof(buf));
- epcs_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);
-}
-
-int epcs_erase (unsigned start, unsigned end)
-{
- unsigned off, sectsz;
- unsigned char buf[4];
- struct epcs_devinfo_t *dev = epcs_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 ("epcs 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] = EPCS_ERASE_SECT;
- buf[1] = off >> 16;
- buf[2] = off >> 8;
- buf[3] = off;
-
- epcs_wr_enable ();
- epcs_cs (1);
- epcs_snd (buf,4);
- epcs_cs (0);
-
- printf ("."); /* Some user feedback */
-
- /* Wait for erase to complete */
- while (epcs_status_rd() & EPCS_STATUS_WIP)
- ;
- }
- printf (" done.\n");
- return (0);
-}
-
-int epcs_read (ulong addr, ulong off, ulong cnt)
-{
- unsigned char buf[4];
- struct epcs_devinfo_t *dev = epcs_dev_find ();
-
- if (!dev)
- return (-1);
-
- buf[0] = EPCS_READ_BYTES;
- buf[1] = off >> 16;
- buf[2] = off >> 8;
- buf[3] = off;
-
- epcs_cs (1);
- epcs_snd (buf,4);
- epcs_rrcv ((unsigned char *)addr, cnt);
- epcs_cs (0);
-
- 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
- ***********************************************************************/
-static
-void do_epcs_info (struct epcs_devinfo_t *dev, int argc, char * const 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) && (argc > 1); i++) {
- erased = epcs_sect_erased (i, &tmp, dev);
- if ((i & 0x03) == 0) printf ("\n");
- printf ("%4d: %07x ",
- i, i*(1<<dev->sz_sect) );
- if (erased)
- printf ("E ");
- else
- printf (" ");
- }
- printf ("\n");
-
- return;
-}
-
-static
-void do_epcs_erase (struct epcs_devinfo_t *dev, int argc, char * const 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;
-}
-
-static
-void do_epcs_protect (struct epcs_devinfo_t *dev, int argc, char * const 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;
-}
-
-static
-void do_epcs_read (struct epcs_devinfo_t *dev, int argc, char * const 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;
-}
-
-static
-void do_epcs_write (struct epcs_devinfo_t *dev, int argc, char * const 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;
-}
-
-static
-void do_epcs_verify (struct epcs_devinfo_t *dev, int argc, char * const 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 * const 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 */
projects / oweals / u-boot.git / commitdiff