summaryrefslogtreecommitdiff
path: root/board/fads/flash.c
diff options
context:
space:
mode:
Diffstat (limited to 'board/fads/flash.c')
-rw-r--r--board/fads/flash.c624
1 files changed, 624 insertions, 0 deletions
diff --git a/board/fads/flash.c b/board/fads/flash.c
new file mode 100644
index 0000000..50b496e
--- /dev/null
+++ b/board/fads/flash.c
@@ -0,0 +1,624 @@
+/*
+ * (C) Copyright 2000
+ * 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 <mpc8xx.h>
+
+flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */
+
+#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
+
+/*-----------------------------------------------------------------------
+ * Functions
+ */
+static ulong flash_get_size (vu_long *addr, flash_info_t *info);
+static int write_word (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 total_size;
+ 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;
+ }
+
+ total_size = 0;
+ size_b0 = 0xffffffff;
+
+ for (i=0; i < CFG_MAX_FLASH_BANKS; ++i)
+ {
+ size_b1 = flash_get_size((vu_long *)(CFG_FLASH_BASE + total_size), &flash_info[i]);
+
+ if (flash_info[i].flash_id == FLASH_UNKNOWN)
+ {
+ printf ("## Unknown FLASH on Bank %d - Size = 0x%08lx = %ld MB\n", i, size_b1, size_b1>>20);
+ }
+
+ /* Is this really needed ? - LP */
+ if (size_b1 > size_b0) {
+ printf ("## ERROR: Bank %d (0x%08lx = %ld MB) > Bank %d (0x%08lx = %ld MB)\n",
+ i, size_b1, size_b1>>20, i-1, size_b0, size_b0>>20);
+ goto out_error;
+ }
+ size_b0 = size_b1;
+ total_size += size_b1;
+ }
+
+ /* Compute the Address Mask */
+ for (i=0; (total_size >> i) != 0; ++i) {};
+ i--;
+
+ if (total_size != (1 << i)) {
+ printf ("## WARNING: Total FLASH size (0x%08lx = %ld MB) is not a power of 2\n",
+ total_size, total_size>>20);
+ }
+
+ /* Remap FLASH according to real size */
+ memctl->memc_or0 = ((((unsigned long)~1) << i) & OR_AM_MSK) | CFG_OR_TIMING_FLASH;
+ memctl->memc_br0 = CFG_BR0_PRELIM;
+
+ total_size = 0;
+
+ for (i=0; i < CFG_MAX_FLASH_BANKS && flash_info[i].size != 0; ++i)
+ {
+ /* Re-do sizing to get full correct info */
+ /* Why ? - LP */
+ size_b1 = flash_get_size((vu_long *)(CFG_FLASH_BASE + total_size), &flash_info[i]);
+
+ /* This is done by flash_get_size - LP */
+ /* flash_get_offsets (CFG_FLASH_BASE + total_size, &flash_info[i]); */
+
+#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[i]);
+#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_SIZE-1,
+ &flash_info[i]);
+#endif
+
+ total_size += size_b1;
+ }
+
+ return (total_size);
+
+out_error:
+ for (i=0; i < CFG_MAX_FLASH_BANKS; ++i)
+ {
+ flash_info[i].flash_id = FLASH_UNKNOWN;
+ flash_info[i].sector_count = -1;
+ flash_info[i].size = 0;
+ }
+
+ return (0);
+}
+
+/*-----------------------------------------------------------------------
+ */
+static void flash_get_offsets (ulong base, flash_info_t *info)
+{
+ int i;
+
+ /* set up sector start address table */
+ if ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM040) {
+ /* set sector offsets for uniform sector type */
+ for (i = 0; i < info->sector_count; i++) {
+ info->start[i] = base + (i * 0x00040000);
+ }
+ }
+}
+
+/*-----------------------------------------------------------------------
+ */
+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_BM: printf ("BRIGHT MICRO "); break;
+ default: printf ("Unknown Vendor "); break;
+ }
+
+ switch (info->flash_id & FLASH_TYPEMASK)
+ {
+ case FLASH_AM040: printf ("29F040 or 29LV040 (4 Mbit, uniform sectors)\n");
+ break;
+ case FLASH_AM400B: printf ("AM29LV400B (4 Mbit, bottom boot sect)\n");
+ break;
+ case FLASH_AM400T: printf ("AM29LV400T (4 Mbit, top boot sector)\n");
+ break;
+ case FLASH_AM800B: printf ("AM29LV800B (8 Mbit, bottom boot sect)\n");
+ break;
+ case FLASH_AM800T: printf ("AM29LV800T (8 Mbit, top boot sector)\n");
+ break;
+ case FLASH_AM160B: printf ("AM29LV160B (16 Mbit, bottom boot sect)\n");
+ break;
+ case FLASH_AM160T: printf ("AM29LV160T (16 Mbit, top boot sector)\n");
+ break;
+ case FLASH_AM320B: printf ("AM29LV320B (32 Mbit, bottom boot sect)\n");
+ break;
+ case FLASH_AM320T: printf ("AM29LV320T (32 Mbit, top boot sector)\n");
+ break;
+ default: printf ("Unknown Chip Type\n");
+ break;
+ }
+
+ printf (" Size: %ld MB in %d Sectors\n",info->size >> 20, 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)
+{
+ short i;
+#if 0
+ ulong base = (ulong)addr;
+#endif
+ uchar value;
+
+ /* Write auto select command: read Manufacturer ID */
+#if 0
+ addr[0x0555] = 0x00AA00AA;
+ addr[0x02AA] = 0x00550055;
+ addr[0x0555] = 0x00900090;
+#else
+ addr[0x0555] = 0xAAAAAAAA;
+ addr[0x02AA] = 0x55555555;
+ addr[0x0555] = 0x90909090;
+#endif
+
+ value = addr[0];
+
+ switch (value + (value << 16))
+ {
+ case AMD_MANUFACT:
+ info->flash_id = FLASH_MAN_AMD;
+ break;
+
+ case FUJ_MANUFACT:
+ info->flash_id = FLASH_MAN_FUJ;
+ break;
+
+ default:
+ info->flash_id = FLASH_UNKNOWN;
+ info->sector_count = 0;
+ info->size = 0;
+ break;
+ }
+
+ value = addr[1]; /* device ID */
+
+ switch (value)
+ {
+ case AMD_ID_F040B:
+ info->flash_id += FLASH_AM040;
+ info->sector_count = 8;
+ info->size = 0x00200000;
+ break; /* => 2 MB */
+
+ case AMD_ID_LV400T:
+ info->flash_id += FLASH_AM400T;
+ info->sector_count = 11;
+ info->size = 0x00100000;
+ break; /* => 1 MB */
+
+ case AMD_ID_LV400B:
+ info->flash_id += FLASH_AM400B;
+ info->sector_count = 11;
+ info->size = 0x00100000;
+ break; /* => 1 MB */
+
+ case AMD_ID_LV800T:
+ info->flash_id += FLASH_AM800T;
+ info->sector_count = 19;
+ info->size = 0x00200000;
+ break; /* => 2 MB */
+
+ case AMD_ID_LV800B:
+ info->flash_id += FLASH_AM800B;
+ info->sector_count = 19;
+ info->size = 0x00200000;
+ break; /* => 2 MB */
+
+ case AMD_ID_LV160T:
+ info->flash_id += FLASH_AM160T;
+ info->sector_count = 35;
+ info->size = 0x00400000;
+ break; /* => 4 MB */
+
+ case AMD_ID_LV160B:
+ info->flash_id += FLASH_AM160B;
+ info->sector_count = 35;
+ info->size = 0x00400000;
+ break; /* => 4 MB */
+#if 0 /* enable when device IDs are available */
+ case AMD_ID_LV320T:
+ info->flash_id += FLASH_AM320T;
+ info->sector_count = 67;
+ info->size = 0x00800000;
+ break; /* => 8 MB */
+
+ case AMD_ID_LV320B:
+ info->flash_id += FLASH_AM320B;
+ info->sector_count = 67;
+ info->size = 0x00800000;
+ break; /* => 8 MB */
+#endif
+ default:
+ info->flash_id = FLASH_UNKNOWN;
+ return (0); /* => no or unknown flash */
+
+ }
+
+#if 0
+ /* set up sector start address table */
+ if (info->flash_id & FLASH_BTYPE) {
+ /* set sector offsets for bottom boot block type */
+ info->start[0] = base + 0x00000000;
+ info->start[1] = base + 0x00008000;
+ info->start[2] = base + 0x0000C000;
+ info->start[3] = base + 0x00010000;
+ for (i = 4; i < info->sector_count; i++) {
+ info->start[i] = base + (i * 0x00020000) - 0x00060000;
+ }
+ } else {
+ /* set sector offsets for top boot block type */
+ i = info->sector_count - 1;
+ info->start[i--] = base + info->size - 0x00008000;
+ info->start[i--] = base + info->size - 0x0000C000;
+ info->start[i--] = base + info->size - 0x00010000;
+ for (; i >= 0; i--) {
+ info->start[i] = base + i * 0x00020000;
+ }
+ }
+#else
+ flash_get_offsets ((ulong)addr, info);
+#endif
+
+ /* check for protected sectors */
+ for (i = 0; i < info->sector_count; i++)
+ {
+ /* read sector protection at sector address, (A7 .. A0) = 0x02 */
+ /* D0 = 1 if protected */
+ addr = (volatile unsigned long *)(info->start[i]);
+ info->protect[i] = addr[2] & 1;
+ }
+
+ /*
+ * Prevent writes to uninitialized FLASH.
+ */
+ if (info->flash_id != FLASH_UNKNOWN)
+ {
+ addr = (volatile unsigned long *)info->start[0];
+#if 0
+ *addr = 0x00F000F0; /* reset bank */
+#else
+ *addr = 0xF0F0F0F0; /* reset bank */
+#endif
+ }
+
+ return (info->size);
+}
+
+
+/*-----------------------------------------------------------------------
+ */
+
+int flash_erase (flash_info_t *info, int s_first, int s_last)
+{
+ vu_long *addr = (vu_long*)(info->start[0]);
+ int flag, prot, sect, l_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_UNKNOWN) ||
+ (info->flash_id > FLASH_AMD_COMP)) {
+ printf ("Can't erase unknown flash type - 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");
+ }
+
+ l_sect = -1;
+
+ /* Disable interrupts which might cause a timeout here */
+ flag = disable_interrupts();
+
+#if 0
+ addr[0x0555] = 0x00AA00AA;
+ addr[0x02AA] = 0x00550055;
+ addr[0x0555] = 0x00800080;
+ addr[0x0555] = 0x00AA00AA;
+ addr[0x02AA] = 0x00550055;
+#else
+ addr[0x0555] = 0xAAAAAAAA;
+ addr[0x02AA] = 0x55555555;
+ addr[0x0555] = 0x80808080;
+ addr[0x0555] = 0xAAAAAAAA;
+ addr[0x02AA] = 0x55555555;
+#endif
+
+ /* Start erase on unprotected sectors */
+ for (sect = s_first; sect<=s_last; sect++) {
+ if (info->protect[sect] == 0) { /* not protected */
+ addr = (vu_long*)(info->start[sect]);
+#if 0
+ addr[0] = 0x00300030;
+#else
+ addr[0] = 0x30303030;
+#endif
+ l_sect = sect;
+ }
+ }
+
+ /* re-enable interrupts if necessary */
+ if (flag)
+ enable_interrupts();
+
+ /* wait at least 80us - let's wait 1 ms */
+ udelay (1000);
+
+ /*
+ * We wait for the last triggered sector
+ */
+ if (l_sect < 0)
+ goto DONE;
+
+ start = get_timer (0);
+ last = start;
+ addr = (vu_long*)(info->start[l_sect]);
+#if 0
+ while ((addr[0] & 0x00800080) != 0x00800080)
+#else
+ while ((addr[0] & 0xFFFFFFFF) != 0xFFFFFFFF)
+#endif
+ {
+ if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
+ printf ("Timeout\n");
+ return 1;
+ }
+ /* show that we're waiting */
+ if ((now - last) > 1000) { /* every second */
+ putc ('.');
+ last = now;
+ }
+ }
+
+DONE:
+ /* reset to read mode */
+ addr = (volatile unsigned long *)info->start[0];
+#if 0
+ addr[0] = 0x00F000F0; /* reset bank */
+#else
+ addr[0] = 0xF0F0F0F0; /* reset bank */
+#endif
+
+ printf (" done\n");
+ return 0;
+}
+
+/*-----------------------------------------------------------------------
+ * Copy memory to flash, returns:
+ * 0 - OK
+ * 1 - write timeout
+ * 2 - Flash not erased
+ */
+
+int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
+{
+ ulong cp, wp, data;
+ int i, l, rc;
+
+ wp = (addr & ~3); /* get lower word 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<4 && cnt>0; ++i) {
+ data = (data << 8) | *src++;
+ --cnt;
+ ++cp;
+ }
+ for (; cnt==0 && i<4; ++i, ++cp) {
+ data = (data << 8) | (*(uchar *)cp);
+ }
+
+ if ((rc = write_word(info, wp, data)) != 0) {
+ return (rc);
+ }
+ wp += 4;
+ }
+
+ /*
+ * handle word aligned part
+ */
+ while (cnt >= 4) {
+ data = 0;
+ for (i=0; i<4; ++i) {
+ data = (data << 8) | *src++;
+ }
+ if ((rc = write_word(info, wp, data)) != 0) {
+ return (rc);
+ }
+ wp += 4;
+ cnt -= 4;
+ }
+
+ if (cnt == 0) {
+ return (0);
+ }
+
+ /*
+ * handle unaligned tail bytes
+ */
+ data = 0;
+ for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
+ data = (data << 8) | *src++;
+ --cnt;
+ }
+ for (; i<4; ++i, ++cp) {
+ data = (data << 8) | (*(uchar *)cp);
+ }
+
+ return (write_word(info, wp, data));
+}
+
+/*-----------------------------------------------------------------------
+ * Write a word to Flash, returns:
+ * 0 - OK
+ * 1 - write timeout
+ * 2 - Flash not erased
+ */
+static int write_word (flash_info_t *info, ulong dest, ulong data)
+{
+ vu_long *addr = (vu_long*)(info->start[0]);
+ ulong start;
+ int flag;
+
+ /* Check if Flash is (sufficiently) erased */
+ if ((*((vu_long *)dest) & data) != data) {
+ return (2);
+ }
+ /* Disable interrupts which might cause a timeout here */
+ flag = disable_interrupts();
+
+#if 0
+ addr[0x0555] = 0x00AA00AA;
+ addr[0x02AA] = 0x00550055;
+ addr[0x0555] = 0x00A000A0;
+#else
+ addr[0x0555] = 0xAAAAAAAA;
+ addr[0x02AA] = 0x55555555;
+ addr[0x0555] = 0xA0A0A0A0;
+#endif
+
+ *((vu_long *)dest) = data;
+
+ /* re-enable interrupts if necessary */
+ if (flag)
+ enable_interrupts();
+
+ /* data polling for D7 */
+ start = get_timer (0);
+#if 0
+ while ((*((vu_long *)dest) & 0x00800080) != (data & 0x00800080))
+#else
+ while ((*((vu_long *)dest) & 0x80808080) != (data & 0x80808080))
+#endif
+ {
+ if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
+ return (1);
+ }
+ }
+ return (0);
+}
+
+/*-----------------------------------------------------------------------
+ */
generated by cgit v1.1 at 2024-11-22 07:51:04 +0000