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-rw-r--r--board/a3000/flash.c454
1 files changed, 454 insertions, 0 deletions
diff --git a/board/a3000/flash.c b/board/a3000/flash.c
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+++ b/board/a3000/flash.c
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+/*
+ * (C) Copyright 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 <common.h>
+#include <mpc824x.h>
+
+#if defined(CFG_ENV_IS_IN_FLASH)
+# ifndef CFG_ENV_ADDR
+# define CFG_ENV_ADDR (CFG_FLASH_BASE + CFG_ENV_OFFSET)
+# endif
+# ifndef CFG_ENV_SIZE
+# define CFG_ENV_SIZE CFG_ENV_SECT_SIZE
+# endif
+# ifndef CFG_ENV_SECT_SIZE
+# define CFG_ENV_SECT_SIZE CFG_ENV_SIZE
+# endif
+#endif
+
+
+/*---------------------------------------------------------------------*/
+#define DEBUG_FLASH
+
+#ifdef DEBUG_FLASH
+#define DEBUGF(fmt,args...) printf(fmt ,##args)
+#else
+#define DEBUGF(fmt,args...)
+#endif
+/*---------------------------------------------------------------------*/
+
+flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */
+
+/*-----------------------------------------------------------------------
+ * Functions
+ */
+static ulong flash_get_size (vu_char *addr, flash_info_t *info);
+static int write_data (flash_info_t *info, uchar *dest, uchar data);
+static void flash_get_offsets (ulong base, flash_info_t *info);
+
+#define BS(b) (b)
+#define BYTEME(x) ((x) & 0xFF)
+
+/*-----------------------------------------------------------------------
+ */
+
+unsigned long flash_init (void)
+{
+ unsigned long flash_banks[CFG_MAX_FLASH_BANKS] = CFG_FLASH_BANKS;
+ unsigned long size, size_b[CFG_MAX_FLASH_BANKS];
+
+ int i;
+
+ /* Init: no FLASHes known */
+ for (i=0; i<CFG_MAX_FLASH_BANKS; ++i)
+ {
+ flash_info[i].flash_id = FLASH_UNKNOWN;
+
+ DEBUGF("Get flash bank %d @ 0x%08lx\n", i, flash_banks[i]);
+/*
+ size_b[i] = flash_get_size((vu_char *)flash_banks[i], &flash_info[i]);
+*/
+ size_b[i] = flash_get_size((vu_char *) 0xff800000 , &flash_info[i]);
+
+ if (flash_info[i].flash_id == FLASH_UNKNOWN)
+ {
+ printf ("## Unknown FLASH on Bank %d: "
+ "ID 0x%lx, Size = 0x%08lx = %ld MB\n",
+ i, flash_info[i].flash_id,
+ size_b[i], size_b[i]<<20);
+ }
+ else
+ {
+ DEBUGF("## Flash bank %d at 0x%08lx sizes: 0x%08lx \n",
+ i, flash_banks[i], size_b[i]);
+
+ flash_get_offsets (flash_banks[i], &flash_info[i]);
+ flash_info[i].size = size_b[i];
+ }
+ }
+
+
+#if CFG_MONITOR_BASE >= CFG_FLASH_BASE
+ DEBUGF("protect monitor %x @ %x\n", CFG_MONITOR_BASE, CFG_MONITOR_LEN);
+ /* monitor protection ON by default */
+ flash_protect(FLAG_PROTECT_SET,
+ CFG_MONITOR_BASE,
+ CFG_MONITOR_BASE+CFG_MONITOR_LEN-1,
+ &flash_info[0]);
+#endif
+
+#ifdef CFG_ENV_IS_IN_FLASH
+ /* ENV protection ON by default */
+ DEBUGF("protect environtment %x @ %x\n", CFG_ENV_ADDR, CFG_ENV_SECT_SIZE);
+ flash_protect(FLAG_PROTECT_SET,
+ CFG_ENV_ADDR,
+ CFG_ENV_ADDR+CFG_ENV_SECT_SIZE-1,
+ &flash_info[0]);
+#endif
+
+ size = 0;
+ DEBUGF("## Final Flash bank sizes: ");
+ for (i=0; i<CFG_MAX_FLASH_BANKS; ++i)
+ {
+ DEBUGF("%08lx ", size_b[i]);
+ size += size_b[i];
+ }
+ DEBUGF("\n");
+ return (size);
+}
+
+/*-----------------------------------------------------------------------
+ */
+static void flash_get_offsets (ulong base, flash_info_t *info)
+{
+ int i;
+
+ if (info->flash_id == FLASH_UNKNOWN) {
+ return;
+ }
+
+ switch (info->flash_id & FLASH_VENDMASK) {
+ case FLASH_MAN_INTEL:
+ for (i = 0; i < info->sector_count; i++) {
+ info->start[i] = base;
+ base += 0x00020000; /* 128k per bank */
+ }
+ return;
+
+ default:
+ printf ("Don't know sector ofsets for flash type 0x%lx\n", info->flash_id);
+ return;
+ }
+}
+
+/*-----------------------------------------------------------------------
+ */
+void flash_print_info (flash_info_t *info)
+{
+ int i;
+
+ if (info->flash_id == FLASH_UNKNOWN) {
+ printf ("missing or unknown FLASH type\n");
+ return;
+ }
+
+ switch (info->flash_id & FLASH_VENDMASK) {
+ case FLASH_MAN_AMD: printf ("AMD "); break;
+ case FLASH_MAN_FUJ: printf ("Fujitsu "); break;
+ case FLASH_MAN_SST: printf ("SST "); break;
+ case FLASH_MAN_STM: printf ("STM "); break;
+ case FLASH_MAN_INTEL: printf ("Intel "); break;
+ case FLASH_MAN_MT: printf ("MT "); break;
+ default: printf ("Unknown Vendor "); break;
+ }
+
+ switch (info->flash_id & FLASH_TYPEMASK) {
+ case FLASH_28F320J3A:
+ printf ("28F320J3A (32Mbit = 128K x 32)\n");
+ break;
+ case FLASH_28F640J3A:
+ printf ("28F640J3A (64Mbit = 128K x 64)\n");
+ break;
+ case FLASH_28F128J3A:
+ printf ("28F128J3A (128Mbit = 128K x 128)\n");
+ break;
+ default:
+ printf ("Unknown Chip Type\n");
+ break;
+ }
+
+#if 1
+ if (info->size >= (1 << 20)) {
+ i = 20;
+ } else {
+ i = 10;
+ }
+ printf (" Size: %ld %cB in %d Sectors\n",
+ info->size >> i,
+ (i == 20) ? 'M' : 'k',
+ info->sector_count);
+
+ printf (" Sector Start Addresses:");
+ for (i=0; i<info->sector_count; ++i) {
+ if ((i % 5) == 0)
+ printf ("\n ");
+ printf (" %08lX%s",
+ info->start[i],
+ info->protect[i] ? " (RO)" : " "
+ );
+ }
+ printf ("\n");
+#endif
+ return;
+}
+
+/*-----------------------------------------------------------------------
+ */
+
+
+/*-----------------------------------------------------------------------
+ */
+
+/*
+ * The following code cannot be run from FLASH!
+ */
+static ulong flash_get_size (vu_char *addr, flash_info_t *info)
+{
+ vu_char manuf, device;
+
+ addr[0] = BS(0x90);
+ manuf = BS(addr[0]);
+ DEBUGF("Manuf. ID @ 0x%08lx: 0x%08x\n", (ulong)addr, manuf);
+
+ switch (manuf) {
+ case BYTEME(AMD_MANUFACT):
+ info->flash_id = FLASH_MAN_AMD;
+ break;
+ case BYTEME(FUJ_MANUFACT):
+ info->flash_id = FLASH_MAN_FUJ;
+ break;
+ case BYTEME(SST_MANUFACT):
+ info->flash_id = FLASH_MAN_SST;
+ break;
+ case BYTEME(STM_MANUFACT):
+ info->flash_id = FLASH_MAN_STM;
+ break;
+ case BYTEME(INTEL_MANUFACT):
+ info->flash_id = FLASH_MAN_INTEL;
+ break;
+ default:
+ info->flash_id = FLASH_UNKNOWN;
+ info->sector_count = 0;
+ info->size = 0;
+ addr[0] = BS(0xFF); /* restore read mode, (yes, BS is a NOP) */
+ return 0; /* no or unknown flash */
+ }
+
+ device = BS(addr[2]); /* device ID */
+
+ DEBUGF("Device ID @ 0x%08lx: 0x%08x\n", (ulong)(&addr[1]), device);
+
+ switch (device) {
+ case BYTEME(INTEL_ID_28F320J3A):
+ info->flash_id += FLASH_28F320J3A;
+ info->sector_count = 32;
+ info->size = 0x00400000;
+ break; /* => 4 MB */
+
+ case BYTEME(INTEL_ID_28F640J3A):
+ info->flash_id += FLASH_28F640J3A;
+ info->sector_count = 64;
+ info->size = 0x00800000;
+ break; /* => 8 MB */
+
+ case BYTEME(INTEL_ID_28F128J3A):
+ info->flash_id += FLASH_28F128J3A;
+ info->sector_count = 128;
+ info->size = 0x01000000;
+ break; /* => 16 MB */
+
+ default:
+ info->flash_id = FLASH_UNKNOWN;
+ addr[0] = BS(0xFF); /* restore read mode (yes, a NOP) */
+ return 0; /* => no or unknown flash */
+
+ }
+
+ if (info->sector_count > CFG_MAX_FLASH_SECT) {
+ printf ("** ERROR: sector count %d > max (%d) **\n",
+ info->sector_count, CFG_MAX_FLASH_SECT);
+ info->sector_count = CFG_MAX_FLASH_SECT;
+ }
+
+ addr[0] = BS(0xFF); /* restore read mode */
+
+ return (info->size);
+}
+
+
+/*-----------------------------------------------------------------------
+ */
+
+int flash_erase (flash_info_t *info, int s_first, int s_last)
+{
+ int flag, prot, sect;
+ ulong start, now, last;
+
+ if ((s_first < 0) || (s_first > s_last)) {
+ if (info->flash_id == FLASH_UNKNOWN) {
+ printf ("- missing\n");
+ } else {
+ printf ("- no sectors to erase\n");
+ }
+ return 1;
+ }
+
+ if ((info->flash_id & FLASH_VENDMASK) != FLASH_MAN_INTEL) {
+ printf ("Can erase only Intel flash types - aborted\n");
+ return 1;
+ }
+
+ prot = 0;
+ for (sect=s_first; sect<=s_last; ++sect) {
+ if (info->protect[sect]) {
+ prot++;
+ }
+ }
+
+ if (prot) {
+ printf ("- Warning: %d protected sectors will not be erased!\n", prot);
+ } else {
+ printf ("\n");
+ }
+
+ start = get_timer (0);
+ last = start;
+ /* Start erase on unprotected sectors */
+ for (sect = s_first; sect<=s_last; sect++) {
+ if (info->protect[sect] == 0) { /* not protected */
+ vu_char *addr = (vu_char *)(info->start[sect]);
+ unsigned long status;
+
+ /* Disable interrupts which might cause a timeout here */
+ flag = disable_interrupts();
+
+ *addr = BS(0x50); /* clear status register */
+ *addr = BS(0x20); /* erase setup */
+ *addr = BS(0xD0); /* erase confirm */
+
+ /* re-enable interrupts if necessary */
+ if (flag) {
+ enable_interrupts();
+ }
+
+ /* wait at least 80us - let's wait 1 ms */
+ udelay (1000);
+
+ while (((status = BS(*addr)) & BYTEME(0x00800080)) != BYTEME(0x00800080)) {
+ if ((now=get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
+ printf ("Timeout\n");
+ *addr = BS(0xB0); /* suspend erase */
+ *addr = BS(0xFF); /* reset to read mode */
+ return 1;
+ }
+
+ /* show that we're waiting */
+ if ((now - last) > 1000) { /* every second */
+ putc ('.');
+ last = now;
+ }
+ }
+
+ *addr = BS(0xFF); /* reset to read mode */
+ }
+ }
+ printf (" done\n");
+ return 0;
+}
+
+/*-----------------------------------------------------------------------
+ * Copy memory to flash, returns:
+ * 0 - OK
+ * 1 - write timeout
+ * 2 - Flash not erased
+ * 4 - Flash not identified
+ */
+
+#define FLASH_WIDTH 1 /* flash bus width in bytes */
+
+int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
+{
+ uchar *wp = (uchar *)addr;
+ int rc;
+
+ if (info->flash_id == FLASH_UNKNOWN) {
+ return 4;
+ }
+
+ while (cnt > 0) {
+ if ((rc = write_data(info, wp, *src)) != 0) {
+ return rc;
+ }
+ wp++;
+ src++;
+ cnt--;
+ }
+
+ return cnt;
+}
+
+/*-----------------------------------------------------------------------
+ * Write a word to Flash, returns:
+ * 0 - OK
+ * 1 - write timeout
+ * 2 - Flash not erased
+ */
+static int write_data (flash_info_t *info, uchar *dest, uchar data)
+{
+ vu_char *addr = (vu_char *)dest;
+ ulong status;
+ ulong start;
+ int flag;
+
+ /* Check if Flash is (sufficiently) erased */
+ if ((BS(*addr) & data) != data) {
+ return 2;
+ }
+ /* Disable interrupts which might cause a timeout here */
+ flag = disable_interrupts();
+
+ *addr = BS(0x40); /* write setup */
+ *addr = data;
+
+ /* re-enable interrupts if necessary */
+ if (flag) {
+ enable_interrupts();
+ }
+
+ start = get_timer (0);
+
+ while (((status = BS(*addr)) & BYTEME(0x00800080)) != BYTEME(0x00800080)) {
+ if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
+ *addr = BS(0xFF); /* restore read mode */
+ return 1;
+ }
+ }
+
+ *addr = BS(0xFF); /* restore read mode */
+
+ return 0;
+}
+
+/*-----------------------------------------------------------------------
+ */
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