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-rw-r--r--board/lwmon/flash.c556
1 files changed, 556 insertions, 0 deletions
diff --git a/board/lwmon/flash.c b/board/lwmon/flash.c
new file mode 100644
index 0000000..3d2a00f
--- /dev/null
+++ b/board/lwmon/flash.c
@@ -0,0 +1,556 @@
+/*
+ * (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
+ */
+
+/* #define DEBUG */
+
+#include <common.h>
+#include <mpc8xx.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
+
+/*---------------------------------------------------------------------*/
+
+flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */
+
+/*-----------------------------------------------------------------------
+ * Functions
+ */
+static ulong flash_get_size (vu_long *addr, flash_info_t *info);
+static int write_data (flash_info_t *info, ulong dest, ulong data);
+static void flash_get_offsets (ulong base, flash_info_t *info);
+
+/*-----------------------------------------------------------------------
+ */
+
+unsigned long flash_init (void)
+{
+ volatile immap_t *immap = (immap_t *)CFG_IMMR;
+ volatile memctl8xx_t *memctl = &immap->im_memctl;
+ unsigned long size_b0, size_b1;
+ int i;
+
+ /* Init: no FLASHes known */
+ for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) {
+ flash_info[i].flash_id = FLASH_UNKNOWN;
+ }
+
+ /* Static FLASH Bank configuration here - FIXME XXX */
+
+ debug ("\n## Get flash bank 1 size @ 0x%08x\n",FLASH_BASE0_PRELIM);
+
+ size_b0 = flash_get_size((vu_long *)FLASH_BASE0_PRELIM, &flash_info[0]);
+
+ if (flash_info[0].flash_id == FLASH_UNKNOWN) {
+ printf ("## Unknown FLASH on Bank 0: "
+ "ID 0x%lx, Size = 0x%08lx = %ld MB\n",
+ flash_info[0].flash_id,
+ size_b0, size_b0<<20);
+ }
+
+ debug ("## Get flash bank 2 size @ 0x%08x\n",FLASH_BASE1_PRELIM);
+
+ size_b1 = flash_get_size((vu_long *)FLASH_BASE1_PRELIM, &flash_info[1]);
+
+ debug ("## Prelim. Flash bank sizes: %08lx + 0x%08lx\n",size_b0,size_b1);
+
+ if (size_b1 > size_b0) {
+ printf ("## ERROR: "
+ "Bank 1 (0x%08lx = %ld MB) > Bank 0 (0x%08lx = %ld MB)\n",
+ size_b1, size_b1<<20,
+ size_b0, size_b0<<20
+ );
+ flash_info[0].flash_id = FLASH_UNKNOWN;
+ flash_info[1].flash_id = FLASH_UNKNOWN;
+ flash_info[0].sector_count = -1;
+ flash_info[1].sector_count = -1;
+ flash_info[0].size = 0;
+ flash_info[1].size = 0;
+ return (0);
+ }
+
+ debug ("## Before remap: "
+ "BR0: 0x%08x OR0: 0x%08x "
+ "BR1: 0x%08x OR1: 0x%08x\n",
+ memctl->memc_br0, memctl->memc_or0,
+ memctl->memc_br1, memctl->memc_or1);
+
+ /* Remap FLASH according to real size */
+ memctl->memc_or0 = (-size_b0 & 0xFFFF8000) | CFG_OR_TIMING_FLASH |
+ OR_CSNT_SAM | OR_ACS_DIV1;
+ memctl->memc_br0 = (CFG_FLASH_BASE & BR_BA_MSK) | BR_PS_32 | BR_V;
+
+ debug ("## BR0: 0x%08x OR0: 0x%08x\n",
+ memctl->memc_br0, memctl->memc_or0);
+
+ /* Re-do sizing to get full correct info */
+ size_b0 = flash_get_size((vu_long *)CFG_FLASH_BASE, &flash_info[0]);
+
+ flash_get_offsets (CFG_FLASH_BASE, &flash_info[0]);
+
+ flash_info[0].size = size_b0;
+
+#if CFG_MONITOR_BASE >= CFG_FLASH_BASE
+ /* 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 */
+ flash_protect(FLAG_PROTECT_SET,
+ CFG_ENV_ADDR,
+ CFG_ENV_ADDR+CFG_ENV_SECT_SIZE-1,
+ &flash_info[0]);
+#endif
+
+ if (size_b1) {
+ memctl->memc_or1 = (-size_b1 & 0xFFFF8000) | CFG_OR_TIMING_FLASH |
+ OR_CSNT_SAM | OR_ACS_DIV1;
+ memctl->memc_br1 = ((CFG_FLASH_BASE + size_b0) & BR_BA_MSK) |
+ BR_PS_32 | BR_V;
+
+ debug ("## BR1: 0x%08x OR1: 0x%08x\n",
+ memctl->memc_br1, memctl->memc_or1);
+
+ /* Re-do sizing to get full correct info */
+ size_b1 = flash_get_size((vu_long *)(CFG_FLASH_BASE + size_b0),
+ &flash_info[1]);
+
+ flash_info[1].size = size_b1;
+
+ flash_get_offsets (CFG_FLASH_BASE + size_b0, &flash_info[1]);
+
+#if CFG_MONITOR_BASE >= CFG_FLASH_BASE
+ /* monitor protection ON by default */
+ flash_protect(FLAG_PROTECT_SET,
+ CFG_MONITOR_BASE,
+ CFG_MONITOR_BASE+CFG_MONITOR_LEN-1,
+ &flash_info[1]);
+#endif
+
+#ifdef CFG_ENV_IS_IN_FLASH
+ /* ENV protection ON by default */
+ flash_protect(FLAG_PROTECT_SET,
+ CFG_ENV_ADDR,
+ CFG_ENV_ADDR+CFG_ENV_SECT_SIZE-1,
+ &flash_info[1]);
+#endif
+ } else {
+ memctl->memc_br1 = 0; /* invalidate bank */
+ memctl->memc_or1 = 0; /* invalidate bank */
+
+ debug ("## DISABLE BR1: 0x%08x OR1: 0x%08x\n",
+ memctl->memc_br1, memctl->memc_or1);
+
+ flash_info[1].flash_id = FLASH_UNKNOWN;
+ flash_info[1].sector_count = -1;
+ flash_info[1].size = 0;
+ }
+
+ debug ("## Final Flash bank sizes: %08lx + 0x%08lx\n",size_b0,size_b1);
+
+ return (size_b0 + size_b1);
+}
+
+/*-----------------------------------------------------------------------
+ */
+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 * 2; /* 128k * 2 chips 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 (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");
+ return;
+}
+
+/*-----------------------------------------------------------------------
+ */
+
+
+/*-----------------------------------------------------------------------
+ */
+
+/*
+ * The following code cannot be run from FLASH!
+ */
+
+static ulong flash_get_size (vu_long *addr, flash_info_t *info)
+{
+ ulong value;
+
+ /* Read Manufacturer ID */
+ addr[0] = 0x00900090;
+ value = addr[0];
+
+ debug ("Manuf. ID @ 0x%08lx: 0x%08lx\n", (ulong)addr, value);
+
+ switch (value) {
+ case AMD_MANUFACT:
+ info->flash_id = FLASH_MAN_AMD;
+ break;
+ case FUJ_MANUFACT:
+ info->flash_id = FLASH_MAN_FUJ;
+ break;
+ case SST_MANUFACT:
+ info->flash_id = FLASH_MAN_SST;
+ break;
+ case STM_MANUFACT:
+ info->flash_id = FLASH_MAN_STM;
+ break;
+ case INTEL_MANUFACT:
+ info->flash_id = FLASH_MAN_INTEL;
+ break;
+ default:
+ info->flash_id = FLASH_UNKNOWN;
+ info->sector_count = 0;
+ info->size = 0;
+ addr[0] = 0x00FF00FF; /* restore read mode */
+ return (0); /* no or unknown flash */
+ }
+
+ value = addr[1]; /* device ID */
+
+ debug ("Device ID @ 0x%08lx: 0x%08lx\n", (ulong)(&addr[1]), value);
+
+ switch (value) {
+ case INTEL_ID_28F320J3A:
+ info->flash_id += FLASH_28F320J3A;
+ info->sector_count = 32;
+ info->size = 0x00400000 * 2;
+ break; /* => 8 MB */
+
+ case INTEL_ID_28F640J3A:
+ info->flash_id += FLASH_28F640J3A;
+ info->sector_count = 64;
+ info->size = 0x00800000 * 2;
+ break; /* => 16 MB */
+
+ case INTEL_ID_28F128J3A:
+ info->flash_id += FLASH_28F128J3A;
+ info->sector_count = 128;
+ info->size = 0x01000000 * 2;
+ break; /* => 32 MB */
+
+ default:
+ info->flash_id = FLASH_UNKNOWN;
+ addr[0] = 0x00FF00FF; /* restore read mode */
+ 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] = 0x00FF00FF; /* 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;
+
+ debug ("flash_erase: first: %d last: %d\n", s_first, s_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_long *addr = (vu_long *)(info->start[sect]);
+ unsigned long status;
+
+ /* Disable interrupts which might cause a timeout here */
+ flag = disable_interrupts();
+
+ *addr = 0x00500050; /* clear status register */
+ *addr = 0x00200020; /* erase setup */
+ *addr = 0x00D000D0; /* erase confirm */
+
+ /* re-enable interrupts if necessary */
+ if (flag)
+ enable_interrupts();
+
+ /* wait at least 80us - let's wait 1 ms */
+ udelay (1000);
+
+ while (((status = *addr) & 0x00800080) != 0x00800080) {
+ if ((now=get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
+ printf ("Timeout\n");
+ *addr = 0x00B000B0; /* suspend erase */
+ *addr = 0x00FF00FF; /* reset to read mode */
+ return 1;
+ }
+
+ /* show that we're waiting */
+ if ((now - last) > 1000) { /* every second */
+ putc ('.');
+ last = now;
+ }
+ }
+
+ *addr = 0x00FF00FF; /* 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 4 /* flash bus width in bytes */
+
+int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
+{
+ ulong cp, wp, data;
+ int i, l, rc;
+
+ if (info->flash_id == FLASH_UNKNOWN) {
+ return 4;
+ }
+
+ wp = (addr & ~(FLASH_WIDTH-1)); /* get lower FLASH_WIDTH aligned address */
+
+ /*
+ * handle unaligned start bytes
+ */
+ if ((l = addr - wp) != 0) {
+ data = 0;
+ for (i=0, cp=wp; i<l; ++i, ++cp) {
+ data = (data << 8) | (*(uchar *)cp);
+ }
+ for (; i<FLASH_WIDTH && cnt>0; ++i) {
+ data = (data << 8) | *src++;
+ --cnt;
+ ++cp;
+ }
+ for (; cnt==0 && i<FLASH_WIDTH; ++i, ++cp) {
+ data = (data << 8) | (*(uchar *)cp);
+ }
+
+ if ((rc = write_data(info, wp, data)) != 0) {
+ return (rc);
+ }
+ wp += FLASH_WIDTH;
+ }
+
+ /*
+ * handle FLASH_WIDTH aligned part
+ */
+ while (cnt >= FLASH_WIDTH) {
+ data = 0;
+ for (i=0; i<FLASH_WIDTH; ++i) {
+ data = (data << 8) | *src++;
+ }
+ if ((rc = write_data(info, wp, data)) != 0) {
+ return (rc);
+ }
+ wp += FLASH_WIDTH;
+ cnt -= FLASH_WIDTH;
+ }
+
+ if (cnt == 0) {
+ return (0);
+ }
+
+ /*
+ * handle unaligned tail bytes
+ */
+ data = 0;
+ for (i=0, cp=wp; i<FLASH_WIDTH && cnt>0; ++i, ++cp) {
+ data = (data << 8) | *src++;
+ --cnt;
+ }
+ for (; i<FLASH_WIDTH; ++i, ++cp) {
+ data = (data << 8) | (*(uchar *)cp);
+ }
+
+ return (write_data(info, wp, data));
+}
+
+/*-----------------------------------------------------------------------
+ * Write a word to Flash, returns:
+ * 0 - OK
+ * 1 - write timeout
+ * 2 - Flash not erased
+ */
+static int write_data (flash_info_t *info, ulong dest, ulong data)
+{
+ vu_long *addr = (vu_long *)dest;
+ ulong status;
+ ulong start;
+ int flag;
+
+ /* Check if Flash is (sufficiently) erased */
+ if ((*addr & data) != data) {
+ return (2);
+ }
+ /* Disable interrupts which might cause a timeout here */
+ flag = disable_interrupts();
+
+ *addr = 0x00400040; /* write setup */
+ *addr = data;
+
+ /* re-enable interrupts if necessary */
+ if (flag)
+ enable_interrupts();
+
+ start = get_timer (0);
+
+ while (((status = *addr) & 0x00800080) != 0x00800080) {
+ if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
+ *addr = 0x00FF00FF; /* restore read mode */
+ return (1);
+ }
+ }
+
+ *addr = 0x00FF00FF; /* restore read mode */
+
+ return (0);
+}
+
+/*-----------------------------------------------------------------------
+ */
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