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-rw-r--r--board/ivm/flash.c598
1 files changed, 598 insertions, 0 deletions
diff --git a/board/ivm/flash.c b/board/ivm/flash.c
new file mode 100644
index 0000000..b5453df
--- /dev/null
+++ b/board/ivm/flash.c
@@ -0,0 +1,598 @@
+/*
+ * (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_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;
+ 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 */
+
+ 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);
+ }
+
+ /* Remap FLASH according to real size */
+ memctl->memc_or0 = CFG_OR_TIMING_FLASH | (-size_b0 & 0xFFFF8000);
+ memctl->memc_br0 = (CFG_FLASH_BASE & BR_BA_MSK) | \
+ BR_MS_GPCM | BR_PS_16 | BR_V;
+
+ /* 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
+
+ return (size_b0);
+}
+
+/*-----------------------------------------------------------------------
+ */
+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_MT:
+ if (info->flash_id & FLASH_BTYPE) {
+ /* set sector offsets for bottom boot block type */
+ info->start[0] = base + 0x00000000;
+ info->start[1] = base + 0x00004000;
+ info->start[2] = base + 0x00006000;
+ info->start[3] = base + 0x00008000;
+ for (i = 4; i < info->sector_count; i++) {
+ info->start[i] = base + ((i-3) * 0x00020000);
+ }
+ } else {
+ /* set sector offsets for top boot block type */
+ i = info->sector_count - 1;
+ info->start[i--] = base + info->size - 0x00004000;
+ info->start[i--] = base + info->size - 0x00006000;
+ info->start[i--] = base + info->size - 0x00008000;
+ for (; i >= 0; i--) {
+ info->start[i] = base + i * 0x00020000;
+ }
+ }
+ return;
+
+ case FLASH_MAN_SST:
+ for (i = 0; i < info->sector_count; i++) {
+ info->start[i] = base + (i * 0x00002000);
+ }
+ return;
+
+ case FLASH_MAN_AMD:
+ case FLASH_MAN_FUJ:
+
+ /* 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;
+ }
+ }
+ 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_MT: printf ("MT "); break;
+ case FLASH_MAN_INTEL: printf ("Intel "); break;
+ default: printf ("Unknown Vendor "); break;
+ }
+
+ switch (info->flash_id & FLASH_TYPEMASK) {
+ 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;
+ case FLASH_SST200A: printf ("39xF200A (2M = 128K x 16)\n");
+ break;
+ case FLASH_SST400A: printf ("39xF400A (4M = 256K x 16)\n");
+ break;
+ case FLASH_SST800A: printf ("39xF800A (8M = 512K x 16)\n");
+ break;
+ case FLASH_STM800AB: printf ("M29W800AB (8M = 512K x 16)\n");
+ break;
+ case FLASH_28F008S5: printf ("28F008S5 (1M = 64K x 16)\n");
+ break;
+ case FLASH_28F400_T: printf ("28F400B3 (4Mbit, top boot sector)\n");
+ break;
+ case FLASH_28F400_B: printf ("28F400B3 (4Mbit, bottom boot sector)\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)
+{
+ ushort value;
+ vu_short *saddr = (vu_short *)addr;
+
+ /* Read Manufacturer ID */
+ saddr[0] = 0x0090;
+ value = saddr[0];
+
+ switch (value) {
+ case (AMD_MANUFACT & 0xFFFF):
+ info->flash_id = FLASH_MAN_AMD;
+ break;
+ case (FUJ_MANUFACT & 0xFFFF):
+ info->flash_id = FLASH_MAN_FUJ;
+ break;
+ case (SST_MANUFACT & 0xFFFF):
+ info->flash_id = FLASH_MAN_SST;
+ break;
+ case (STM_MANUFACT & 0xFFFF):
+ info->flash_id = FLASH_MAN_STM;
+ break;
+ case (MT_MANUFACT & 0xFFFF):
+ info->flash_id = FLASH_MAN_MT;
+ break;
+ default:
+ info->flash_id = FLASH_UNKNOWN;
+ info->sector_count = 0;
+ info->size = 0;
+ saddr[0] = 0x00FF; /* restore read mode */
+ return (0); /* no or unknown flash */
+ }
+
+ value = saddr[1]; /* device ID */
+
+ switch (value) {
+ case (AMD_ID_LV400T & 0xFFFF):
+ info->flash_id += FLASH_AM400T;
+ info->sector_count = 11;
+ info->size = 0x00100000;
+ break; /* => 1 MB */
+
+ case (AMD_ID_LV400B & 0xFFFF):
+ info->flash_id += FLASH_AM400B;
+ info->sector_count = 11;
+ info->size = 0x00100000;
+ break; /* => 1 MB */
+
+ case (AMD_ID_LV800T & 0xFFFF):
+ info->flash_id += FLASH_AM800T;
+ info->sector_count = 19;
+ info->size = 0x00200000;
+ break; /* => 2 MB */
+
+ case (AMD_ID_LV800B & 0xFFFF):
+ info->flash_id += FLASH_AM800B;
+ info->sector_count = 19;
+ info->size = 0x00200000;
+ break; /* => 2 MB */
+
+ case (AMD_ID_LV160T & 0xFFFF):
+ info->flash_id += FLASH_AM160T;
+ info->sector_count = 35;
+ info->size = 0x00400000;
+ break; /* => 4 MB */
+
+ case (AMD_ID_LV160B & 0xFFFF):
+ 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 & 0xFFFF):
+ info->flash_id += FLASH_AM320T;
+ info->sector_count = 67;
+ info->size = 0x00800000;
+ break; /* => 8 MB */
+
+ case (AMD_ID_LV320B & 0xFFFF):
+ info->flash_id += FLASH_AM320B;
+ info->sector_count = 67;
+ info->size = 0x00800000;
+ break; /* => 8 MB */
+#endif
+ case (SST_ID_xF200A & 0xFFFF):
+ info->flash_id += FLASH_SST200A;
+ info->sector_count = 64; /* 39xF200A ID ( 2M = 128K x 16 ) */
+ info->size = 0x00080000;
+ break;
+ case (SST_ID_xF400A & 0xFFFF):
+ info->flash_id += FLASH_SST400A;
+ info->sector_count = 128; /* 39xF400A ID ( 4M = 256K x 16 ) */
+ info->size = 0x00100000;
+ break;
+ case (SST_ID_xF800A & 0xFFFF):
+ info->flash_id += FLASH_SST800A;
+ info->sector_count = 256; /* 39xF800A ID ( 8M = 512K x 16 ) */
+ info->size = 0x00200000;
+ break; /* => 2 MB */
+ case (STM_ID_x800AB & 0xFFFF):
+ info->flash_id += FLASH_STM800AB;
+ info->sector_count = 19;
+ info->size = 0x00200000;
+ break; /* => 2 MB */
+ case (MT_ID_28F400_T & 0xFFFF):
+ info->flash_id += FLASH_28F400_T;
+ info->sector_count = 7;
+ info->size = 0x00080000;
+ break; /* => 512 kB */
+ case (MT_ID_28F400_B & 0xFFFF):
+ info->flash_id += FLASH_28F400_B;
+ info->sector_count = 7;
+ info->size = 0x00080000;
+ break; /* => 512 kB */
+ default:
+ info->flash_id = FLASH_UNKNOWN;
+ saddr[0] = 0x00FF; /* 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;
+ }
+
+ saddr[0] = 0x00FF; /* 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_MT) {
+ printf ("Can erase only MT 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_short *addr = (vu_short *)(info->start[sect]);
+ unsigned short status;
+
+ /* Disable interrupts which might cause a timeout here */
+ flag = disable_interrupts();
+
+ *addr = 0x0050; /* clear status register */
+ *addr = 0x0020; /* erase setup */
+ *addr = 0x00D0; /* 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) & 0x0080) != 0x0080) {
+ if ((now=get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
+ printf ("Timeout\n");
+ *addr = 0x00FF; /* reset to read mode */
+ return 1;
+ }
+
+ /* show that we're waiting */
+ if ((now - last) > 1000) { /* every second */
+ putc ('.');
+ last = now;
+ }
+ }
+
+ *addr = 0x00FF; /* 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 2 /* 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_short *addr = (vu_short *)dest;
+ ushort sdata = (ushort)data;
+ ushort status;
+ ulong start;
+ int flag;
+
+ /* Check if Flash is (sufficiently) erased */
+ if ((*addr & sdata) != sdata) {
+ return (2);
+ }
+ /* Disable interrupts which might cause a timeout here */
+ flag = disable_interrupts();
+
+ *addr = 0x0040; /* write setup */
+ *addr = sdata;
+
+ /* re-enable interrupts if necessary */
+ if (flag)
+ enable_interrupts();
+
+ start = get_timer (0);
+
+ while (((status = *addr) & 0x0080) != 0x0080) {
+ if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
+ *addr = 0x00FF; /* restore read mode */
+ return (1);
+ }
+ }
+
+ *addr = 0x00FF; /* restore read mode */
+
+ return (0);
+}
+
+/*-----------------------------------------------------------------------
+ */
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