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-rw-r--r--board/incaip/flash.c671
1 files changed, 671 insertions, 0 deletions
diff --git a/board/incaip/flash.c b/board/incaip/flash.c
new file mode 100644
index 0000000..427f14a
--- /dev/null
+++ b/board/incaip/flash.c
@@ -0,0 +1,671 @@
+/*
+ * (C) Copyright 2003
+ * 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 <asm/inca-ip.h>
+
+flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */
+
+/* NOTE - CONFIG_FLASH_16BIT means the CPU interface is 16-bit, it
+ * has nothing to do with the flash chip being 8-bit or 16-bit.
+ */
+#ifdef CONFIG_FLASH_16BIT
+typedef unsigned short FLASH_PORT_WIDTH;
+typedef volatile unsigned short FLASH_PORT_WIDTHV;
+#define FLASH_ID_MASK 0xFFFF
+#else
+typedef unsigned long FLASH_PORT_WIDTH;
+typedef volatile unsigned long FLASH_PORT_WIDTHV;
+#define FLASH_ID_MASK 0xFFFFFFFF
+#endif
+
+#define FPW FLASH_PORT_WIDTH
+#define FPWV FLASH_PORT_WIDTHV
+
+#define ORMASK(size) ((-size) & OR_AM_MSK)
+
+#if 0
+#define FLASH_CYCLE1 0x0555
+#define FLASH_CYCLE2 0x02aa
+#else
+#define FLASH_CYCLE1 0x0554
+#define FLASH_CYCLE2 0x02ab
+#endif
+
+/*-----------------------------------------------------------------------
+ * Functions
+ */
+static ulong flash_get_size(FPWV *addr, flash_info_t *info);
+static void flash_reset(flash_info_t *info);
+static int write_word_intel(flash_info_t *info, FPWV *dest, FPW data);
+static int write_word_amd(flash_info_t *info, FPWV *dest, FPW data);
+static void flash_get_offsets(ulong base, flash_info_t *info);
+static flash_info_t *flash_get_info(ulong base);
+
+/*-----------------------------------------------------------------------
+ * flash_init()
+ *
+ * sets up flash_info and returns size of FLASH (bytes)
+ */
+unsigned long flash_init (void)
+{
+ unsigned long size = 0;
+ int i;
+
+ /* Init: no FLASHes known */
+ for (i=0; i < CFG_MAX_FLASH_BANKS; ++i) {
+ ulong flashbase = (i == 0) ? PHYS_FLASH_1 : PHYS_FLASH_2;
+ ulong * buscon = (ulong *)
+ ((i == 0) ? INCA_IP_EBU_EBU_BUSCON0 : INCA_IP_EBU_EBU_BUSCON2);
+
+ /* Disable write protection */
+ *buscon &= ~INCA_IP_EBU_EBU_BUSCON1_WRDIS;
+
+#if 1
+ memset(&flash_info[i], 0, sizeof(flash_info_t));
+#endif
+
+ flash_info[i].size =
+ flash_get_size((FPW *)flashbase, &flash_info[i]);
+
+ if (flash_info[i].flash_id == FLASH_UNKNOWN) {
+ printf ("## Unknown FLASH on Bank %d - Size = 0x%08lx\n",
+ i, flash_info[i].size);
+ }
+
+ size += flash_info[i].size;
+ }
+
+#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_get_info(CFG_MONITOR_BASE));
+#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_get_info(CFG_ENV_ADDR));
+#endif
+
+
+ return size;
+}
+
+/*-----------------------------------------------------------------------
+ */
+static void flash_reset(flash_info_t *info)
+{
+ FPWV *base = (FPWV *)(info->start[0]);
+
+ /* Put FLASH back in read mode */
+ if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL)
+ *base = (FPW)0x00FF00FF; /* Intel Read Mode */
+ else if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_AMD)
+ *base = (FPW)0x00F000F0; /* AMD Read Mode */
+}
+
+/*-----------------------------------------------------------------------
+ */
+static void flash_get_offsets (ulong base, flash_info_t *info)
+{
+ int i;
+
+ /* set up sector start address table */
+ if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL
+ && (info->flash_id & FLASH_BTYPE)) {
+ int bootsect_size; /* number of bytes/boot sector */
+ int sect_size; /* number of bytes/regular sector */
+
+ bootsect_size = 0x00002000 * (sizeof(FPW)/2);
+ sect_size = 0x00010000 * (sizeof(FPW)/2);
+
+ /* set sector offsets for bottom boot block type */
+ for (i = 0; i < 8; ++i) {
+ info->start[i] = base + (i * bootsect_size);
+ }
+ for (i = 8; i < info->sector_count; i++) {
+ info->start[i] = base + ((i - 7) * sect_size);
+ }
+ }
+ else if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_AMD
+ && (info->flash_id & FLASH_TYPEMASK) == FLASH_AM640U) {
+
+ int sect_size; /* number of bytes/sector */
+
+ sect_size = 0x00010000 * (sizeof(FPW)/2);
+
+ /* set up sector start address table (uniform sector type) */
+ for( i = 0; i < info->sector_count; i++ )
+ info->start[i] = base + (i * sect_size);
+ }
+}
+
+/*-----------------------------------------------------------------------
+ */
+
+static flash_info_t *flash_get_info(ulong base)
+{
+ int i;
+ flash_info_t * info;
+
+ for (i = 0; i < CFG_MAX_FLASH_BANKS; i ++) {
+ info = & flash_info[i];
+ if (info->start[0] <= base && base < info->start[0] + info->size)
+ break;
+ }
+
+ return i == CFG_MAX_FLASH_BANKS ? 0 : info;
+}
+
+/*-----------------------------------------------------------------------
+ */
+
+void flash_print_info (flash_info_t *info)
+{
+ int i;
+ uchar *boottype;
+ uchar *bootletter;
+ uchar *fmt;
+ uchar botbootletter[] = "B";
+ uchar topbootletter[] = "T";
+ uchar botboottype[] = "bottom boot sector";
+ uchar topboottype[] = "top boot sector";
+
+ 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_BM: printf ("BRIGHT MICRO "); 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;
+ default: printf ("Unknown Vendor "); break;
+ }
+
+ /* check for top or bottom boot, if it applies */
+ if (info->flash_id & FLASH_BTYPE) {
+ boottype = botboottype;
+ bootletter = botbootletter;
+ }
+ else {
+ boottype = topboottype;
+ bootletter = topbootletter;
+ }
+
+ switch (info->flash_id & FLASH_TYPEMASK) {
+ case FLASH_AM640U:
+ fmt = "29LV641D (64 Mbit, uniform sectors)\n";
+ break;
+ case FLASH_28F800C3B:
+ case FLASH_28F800C3T:
+ fmt = "28F800C3%s (8 Mbit, %s)\n";
+ break;
+ case FLASH_INTEL800B:
+ case FLASH_INTEL800T:
+ fmt = "28F800B3%s (8 Mbit, %s)\n";
+ break;
+ case FLASH_28F160C3B:
+ case FLASH_28F160C3T:
+ fmt = "28F160C3%s (16 Mbit, %s)\n";
+ break;
+ case FLASH_INTEL160B:
+ case FLASH_INTEL160T:
+ fmt = "28F160B3%s (16 Mbit, %s)\n";
+ break;
+ case FLASH_28F320C3B:
+ case FLASH_28F320C3T:
+ fmt = "28F320C3%s (32 Mbit, %s)\n";
+ break;
+ case FLASH_INTEL320B:
+ case FLASH_INTEL320T:
+ fmt = "28F320B3%s (32 Mbit, %s)\n";
+ break;
+ case FLASH_28F640C3B:
+ case FLASH_28F640C3T:
+ fmt = "28F640C3%s (64 Mbit, %s)\n";
+ break;
+ case FLASH_INTEL640B:
+ case FLASH_INTEL640T:
+ fmt = "28F640B3%s (64 Mbit, %s)\n";
+ break;
+ default:
+ fmt = "Unknown Chip Type\n";
+ break;
+ }
+
+ printf (fmt, bootletter, boottype);
+
+ 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");
+}
+
+/*-----------------------------------------------------------------------
+ */
+
+/*
+ * The following code cannot be run from FLASH!
+ */
+
+ulong flash_get_size (FPWV *addr, flash_info_t *info)
+{
+ /* Write auto select command: read Manufacturer ID */
+
+ /* Write auto select command sequence and test FLASH answer */
+ addr[FLASH_CYCLE1] = (FPW)0x00AA00AA; /* for AMD, Intel ignores this */
+ addr[FLASH_CYCLE2] = (FPW)0x00550055; /* for AMD, Intel ignores this */
+ addr[FLASH_CYCLE1] = (FPW)0x00900090; /* selects Intel or AMD */
+
+ /* The manufacturer codes are only 1 byte, so just use 1 byte.
+ * This works for any bus width and any FLASH device width.
+ */
+ switch (addr[1] & 0xff) {
+
+ case (uchar)AMD_MANUFACT:
+ info->flash_id = FLASH_MAN_AMD;
+ break;
+
+ case (uchar)INTEL_MANUFACT:
+ info->flash_id = FLASH_MAN_INTEL;
+ break;
+
+ default:
+ info->flash_id = FLASH_UNKNOWN;
+ info->sector_count = 0;
+ info->size = 0;
+ break;
+ }
+
+ /* Check 16 bits or 32 bits of ID so work on 32 or 16 bit bus. */
+ if (info->flash_id != FLASH_UNKNOWN) switch (addr[0]) {
+
+ case (FPW)AMD_ID_LV640U: /* 29LV640 and 29LV641 have same ID */
+ info->flash_id += FLASH_AM640U;
+ info->sector_count = 128;
+ info->size = 0x00800000 * (sizeof(FPW)/2);
+ break; /* => 8 or 16 MB */
+
+ case (FPW)INTEL_ID_28F800C3B:
+ info->flash_id += FLASH_28F800C3B;
+ info->sector_count = 23;
+ info->size = 0x00100000 * (sizeof(FPW)/2);
+ break; /* => 1 or 2 MB */
+
+ case (FPW)INTEL_ID_28F800B3B:
+ info->flash_id += FLASH_INTEL800B;
+ info->sector_count = 23;
+ info->size = 0x00100000 * (sizeof(FPW)/2);
+ break; /* => 1 or 2 MB */
+
+ case (FPW)INTEL_ID_28F160C3B:
+ info->flash_id += FLASH_28F160C3B;
+ info->sector_count = 39;
+ info->size = 0x00200000 * (sizeof(FPW)/2);
+ break; /* => 2 or 4 MB */
+
+ case (FPW)INTEL_ID_28F160B3B:
+ info->flash_id += FLASH_INTEL160B;
+ info->sector_count = 39;
+ info->size = 0x00200000 * (sizeof(FPW)/2);
+ break; /* => 2 or 4 MB */
+
+ case (FPW)INTEL_ID_28F320C3B:
+ info->flash_id += FLASH_28F320C3B;
+ info->sector_count = 71;
+ info->size = 0x00400000 * (sizeof(FPW)/2);
+ break; /* => 4 or 8 MB */
+
+ case (FPW)INTEL_ID_28F320B3B:
+ info->flash_id += FLASH_INTEL320B;
+ info->sector_count = 71;
+ info->size = 0x00400000 * (sizeof(FPW)/2);
+ break; /* => 4 or 8 MB */
+
+ case (FPW)INTEL_ID_28F640C3B:
+ info->flash_id += FLASH_28F640C3B;
+ info->sector_count = 135;
+ info->size = 0x00800000 * (sizeof(FPW)/2);
+ break; /* => 8 or 16 MB */
+
+ case (FPW)INTEL_ID_28F640B3B:
+ info->flash_id += FLASH_INTEL640B;
+ info->sector_count = 135;
+ info->size = 0x00800000 * (sizeof(FPW)/2);
+ break; /* => 8 or 16 MB */
+
+ default:
+ info->flash_id = FLASH_UNKNOWN;
+ info->sector_count = 0;
+ info->size = 0;
+ return (0); /* => no or unknown flash */
+ }
+
+ flash_get_offsets((ulong)addr, info);
+
+ /* Put FLASH back in read mode */
+ flash_reset(info);
+
+ return (info->size);
+}
+
+/*-----------------------------------------------------------------------
+ */
+
+int flash_erase (flash_info_t *info, int s_first, int s_last)
+{
+ FPWV *addr;
+ int flag, prot, sect;
+ int intel = (info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL;
+ ulong start, now, last;
+ int rcode = 0;
+
+ 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;
+ }
+
+ switch (info->flash_id & FLASH_TYPEMASK) {
+ case FLASH_INTEL800B:
+ case FLASH_INTEL160B:
+ case FLASH_INTEL320B:
+ case FLASH_INTEL640B:
+ case FLASH_28F800C3B:
+ case FLASH_28F160C3B:
+ case FLASH_28F320C3B:
+ case FLASH_28F640C3B:
+ case FLASH_AM640U:
+ break;
+ case FLASH_UNKNOWN:
+ default:
+ printf ("Can't erase unknown flash type %08lx - aborted\n",
+ info->flash_id);
+ 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");
+ }
+
+ last = get_timer(0);
+
+ /* Start erase on unprotected sectors */
+ for (sect = s_first; sect<=s_last && rcode == 0; sect++) {
+
+ if (info->protect[sect] != 0) /* protected, skip it */
+ continue;
+
+ /* Disable interrupts which might cause a timeout here */
+ flag = disable_interrupts();
+
+ addr = (FPWV *)(info->start[sect]);
+ if (intel) {
+ *addr = (FPW)0x00500050; /* clear status register */
+ *addr = (FPW)0x00200020; /* erase setup */
+ *addr = (FPW)0x00D000D0; /* erase confirm */
+ }
+ else {
+ /* must be AMD style if not Intel */
+ FPWV *base; /* first address in bank */
+
+ base = (FPWV *)(info->start[0]);
+ base[FLASH_CYCLE1] = (FPW)0x00AA00AA; /* unlock */
+ base[FLASH_CYCLE2] = (FPW)0x00550055; /* unlock */
+ base[FLASH_CYCLE1] = (FPW)0x00800080; /* erase mode */
+ base[FLASH_CYCLE1] = (FPW)0x00AA00AA; /* unlock */
+ base[FLASH_CYCLE2] = (FPW)0x00550055; /* unlock */
+ *addr = (FPW)0x00300030; /* erase sector */
+ }
+
+ /* re-enable interrupts if necessary */
+ if (flag)
+ enable_interrupts();
+
+ start = get_timer(0);
+
+ /* wait at least 50us for AMD, 80us for Intel.
+ * Let's wait 1 ms.
+ */
+ udelay (1000);
+
+ while ((*addr & (FPW)0x00800080) != (FPW)0x00800080) {
+ if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
+ printf ("Timeout\n");
+
+ if (intel) {
+ /* suspend erase */
+ *addr = (FPW)0x00B000B0;
+ }
+
+ flash_reset(info); /* reset to read mode */
+ rcode = 1; /* failed */
+ break;
+ }
+
+ /* show that we're waiting */
+ if ((get_timer(last)) > CFG_HZ) {/* every second */
+ putc ('.');
+ last = get_timer(0);
+ }
+ }
+
+ /* show that we're waiting */
+ if ((get_timer(last)) > CFG_HZ) { /* every second */
+ putc ('.');
+ last = get_timer(0);
+ }
+
+ flash_reset(info); /* reset to read mode */
+ }
+
+ printf (" done\n");
+ return rcode;
+}
+
+/*-----------------------------------------------------------------------
+ * 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)
+{
+ FPW data = 0; /* 16 or 32 bit word, matches flash bus width on MPC8XX */
+ int bytes; /* number of bytes to program in current word */
+ int left; /* number of bytes left to program */
+ int i, res;
+
+ for (left = cnt, res = 0;
+ left > 0 && res == 0;
+ addr += sizeof(data), left -= sizeof(data) - bytes) {
+
+ bytes = addr & (sizeof(data) - 1);
+ addr &= ~(sizeof(data) - 1);
+
+ /* combine source and destination data so can program
+ * an entire word of 16 or 32 bits
+ */
+ for (i = 0; i < sizeof(data); i++) {
+ data <<= 8;
+ if (i < bytes || i - bytes >= left )
+ data += *((uchar *)addr + i);
+ else
+ data += *src++;
+ }
+
+ /* write one word to the flash */
+ switch (info->flash_id & FLASH_VENDMASK) {
+ case FLASH_MAN_AMD:
+ res = write_word_amd(info, (FPWV *)addr, data);
+ break;
+ case FLASH_MAN_INTEL:
+ res = write_word_intel(info, (FPWV *)addr, data);
+ break;
+ default:
+ /* unknown flash type, error! */
+ printf ("missing or unknown FLASH type\n");
+ res = 1; /* not really a timeout, but gives error */
+ break;
+ }
+ }
+
+ return (res);
+}
+
+/*-----------------------------------------------------------------------
+ * Write a word to Flash for AMD FLASH
+ * A word is 16 or 32 bits, whichever the bus width of the flash bank
+ * (not an individual chip) is.
+ *
+ * returns:
+ * 0 - OK
+ * 1 - write timeout
+ * 2 - Flash not erased
+ */
+static int write_word_amd (flash_info_t *info, FPWV *dest, FPW data)
+{
+ ulong start;
+ int flag;
+ int res = 0; /* result, assume success */
+ FPWV *base; /* first address in flash bank */
+
+ /* Check if Flash is (sufficiently) erased */
+ if ((*dest & data) != data) {
+ return (2);
+ }
+
+
+ base = (FPWV *)(info->start[0]);
+
+ /* Disable interrupts which might cause a timeout here */
+ flag = disable_interrupts();
+
+ base[FLASH_CYCLE1] = (FPW)0x00AA00AA; /* unlock */
+ base[FLASH_CYCLE2] = (FPW)0x00550055; /* unlock */
+ base[FLASH_CYCLE1] = (FPW)0x00A000A0; /* selects program mode */
+
+ *dest = data; /* start programming the data */
+
+ /* re-enable interrupts if necessary */
+ if (flag)
+ enable_interrupts();
+
+ start = get_timer (0);
+
+ /* data polling for D7 */
+ while (res == 0 && (*dest & (FPW)0x00800080) != (data & (FPW)0x00800080)) {
+ if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
+ *dest = (FPW)0x00F000F0; /* reset bank */
+ res = 1;
+ }
+ }
+
+ return (res);
+}
+
+/*-----------------------------------------------------------------------
+ * Write a word to Flash for Intel FLASH
+ * A word is 16 or 32 bits, whichever the bus width of the flash bank
+ * (not an individual chip) is.
+ *
+ * returns:
+ * 0 - OK
+ * 1 - write timeout
+ * 2 - Flash not erased
+ */
+static int write_word_intel (flash_info_t *info, FPWV *dest, FPW data)
+{
+ ulong start;
+ int flag;
+ int res = 0; /* result, assume success */
+
+ /* Check if Flash is (sufficiently) erased */
+ if ((*dest & data) != data) {
+ return (2);
+ }
+
+ /* Disable interrupts which might cause a timeout here */
+ flag = disable_interrupts();
+
+ *dest = (FPW)0x00500050; /* clear status register */
+ *dest = (FPW)0x00FF00FF; /* make sure in read mode */
+ *dest = (FPW)0x00400040; /* program setup */
+
+ *dest = data; /* start programming the data */
+
+ /* re-enable interrupts if necessary */
+ if (flag)
+ enable_interrupts();
+
+ start = get_timer (0);
+
+ while (res == 0 && (*dest & (FPW)0x00800080) != (FPW)0x00800080) {
+ if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
+ *dest = (FPW)0x00B000B0; /* Suspend program */
+ res = 1;
+ }
+ }
+
+ if (res == 0 && (*dest & (FPW)0x00100010))
+ res = 1; /* write failed, time out error is close enough */
+
+ *dest = (FPW)0x00500050; /* clear status register */
+ *dest = (FPW)0x00FF00FF; /* make sure in read mode */
+
+ return (res);
+}
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