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Diffstat (limited to 'board/freescale/m5253demo/flash.c')
-rw-r--r--board/freescale/m5253demo/flash.c467
1 files changed, 467 insertions, 0 deletions
diff --git a/board/freescale/m5253demo/flash.c b/board/freescale/m5253demo/flash.c
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+++ b/board/freescale/m5253demo/flash.c
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+/*
+ * (C) Copyright 2000-2003
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * Copyright (C) 2004-2007 Freescale Semiconductor, Inc.
+ * TsiChung Liew (Tsi-Chung.Liew@freescale.com)
+ *
+ * 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/immap.h>
+
+#ifndef CFG_FLASH_CFI
+typedef unsigned short FLASH_PORT_WIDTH;
+typedef volatile unsigned short FLASH_PORT_WIDTHV;
+
+#define FPW FLASH_PORT_WIDTH
+#define FPWV FLASH_PORT_WIDTHV
+
+#define FLASH_CYCLE1 0x5555
+#define FLASH_CYCLE2 0x2aaa
+
+#define SYNC __asm__("nop")
+
+/*-----------------------------------------------------------------------
+ * Functions
+ */
+
+ulong flash_get_size(FPWV * addr, flash_info_t * info);
+int flash_get_offsets(ulong base, flash_info_t * info);
+int write_word(flash_info_t * info, FPWV * dest, u16 data);
+void inline spin_wheel(void);
+
+flash_info_t flash_info[CFG_MAX_FLASH_BANKS];
+
+ulong flash_init(void)
+{
+ ulong size = 0;
+ ulong fbase = 0;
+
+ fbase = (ulong) CFG_FLASH_BASE;
+ flash_get_size((FPWV *) fbase, &flash_info[0]);
+ flash_get_offsets((ulong) fbase, &flash_info[0]);
+ fbase += flash_info[0].size;
+ size += flash_info[0].size;
+
+ /* Protect monitor and environment sectors */
+ flash_protect(FLAG_PROTECT_SET,
+ CFG_MONITOR_BASE,
+ CFG_MONITOR_BASE + monitor_flash_len - 1, &flash_info[0]);
+
+ return size;
+}
+
+int flash_get_offsets(ulong base, flash_info_t * info)
+{
+ int j, k;
+
+ if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) {
+
+ info->start[0] = base;
+ for (k = 0, j = 0; j < CFG_SST_SECT; j++, k++) {
+ info->start[k + 1] = info->start[k] + CFG_SST_SECTSZ;
+ info->protect[k] = 0;
+ }
+ }
+
+ return ERR_OK;
+}
+
+void flash_print_info(flash_info_t * info)
+{
+ int i;
+
+ switch (info->flash_id & FLASH_VENDMASK) {
+ case FLASH_MAN_SST:
+ printf("SST ");
+ break;
+ default:
+ printf("Unknown Vendor ");
+ break;
+ }
+
+ switch (info->flash_id & FLASH_TYPEMASK) {
+ case FLASH_SST6401B:
+ printf("SST39VF6401B\n");
+ break;
+ default:
+ printf("Unknown Chip Type\n");
+ return;
+ }
+
+ if (info->size > 0x100000) {
+ int remainder;
+
+ printf(" Size: %ld", info->size >> 20);
+
+ remainder = (info->size % 0x100000);
+ if (remainder) {
+ remainder >>= 10;
+ remainder = (int)((float)
+ (((float)remainder / (float)1024) *
+ 10000));
+ printf(".%d ", remainder);
+ }
+
+ printf("MB in %d Sectors\n", info->sector_count);
+ } else
+ printf(" Size: %ld KB in %d Sectors\n",
+ info->size >> 10, 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)
+{
+ u16 value;
+
+ addr[FLASH_CYCLE1] = (FPWV) 0x00AA00AA; /* for Atmel, Intel ignores this */
+ addr[FLASH_CYCLE2] = (FPWV) 0x00550055; /* for Atmel, Intel ignores this */
+ addr[FLASH_CYCLE1] = (FPWV) 0x00900090; /* selects Intel or Atmel */
+
+ switch (addr[0] & 0xffff) {
+ case (u8) SST_MANUFACT:
+ info->flash_id = FLASH_MAN_SST;
+ value = addr[1];
+ break;
+ default:
+ printf("Unknown Flash\n");
+ info->flash_id = FLASH_UNKNOWN;
+ info->sector_count = 0;
+ info->size = 0;
+
+ *addr = (FPW) 0x00F000F0;
+ return (0); /* no or unknown flash */
+ }
+
+ switch (value) {
+ case (u16) SST_ID_xF6401B:
+ info->flash_id += FLASH_SST6401B;
+ break;
+ default:
+ info->flash_id = FLASH_UNKNOWN;
+ break;
+ }
+
+ info->sector_count = 0;
+ info->size = 0;
+ info->sector_count = CFG_SST_SECT;
+ info->size = CFG_SST_SECT * CFG_SST_SECTSZ;
+
+ /* reset ID mode */
+ *addr = (FPWV) 0x00F000F0;
+
+ 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;
+ }
+
+ return (info->size);
+}
+
+int flash_erase(flash_info_t * info, int s_first, int s_last)
+{
+ FPWV *addr;
+ int flag, prot, sect, count;
+ ulong type, start, last;
+ int rcode = 0, flashtype = 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;
+ }
+
+ type = (info->flash_id & FLASH_VENDMASK);
+
+ switch (type) {
+ case FLASH_MAN_SST:
+ flashtype = 1;
+ break;
+ default:
+ type = (info->flash_id & FLASH_VENDMASK);
+ 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");
+
+ flag = disable_interrupts();
+
+ start = get_timer(0);
+ last = start;
+
+ if ((s_last - s_first) == (CFG_SST_SECT - 1)) {
+ if (prot == 0) {
+ addr = (FPWV *) info->start[0];
+
+ addr[FLASH_CYCLE1] = 0x00AA; /* unlock */
+ addr[FLASH_CYCLE2] = 0x0055; /* unlock */
+ addr[FLASH_CYCLE1] = 0x0080; /* erase mode */
+ addr[FLASH_CYCLE1] = 0x00AA; /* unlock */
+ addr[FLASH_CYCLE2] = 0x0055; /* unlock */
+ *addr = 0x0030; /* erase chip */
+
+ count = 0;
+ start = get_timer(0);
+
+ while ((*addr & 0x0080) != 0x0080) {
+ if (count++ > 0x10000) {
+ spin_wheel();
+ count = 0;
+ }
+
+ if (get_timer(start) > CFG_FLASH_ERASE_TOUT) {
+ printf("Timeout\n");
+ *addr = 0x00F0; /* reset to read mode */
+
+ return 1;
+ }
+ }
+
+ *addr = 0x00F0; /* reset to read mode */
+
+ printf("\b. done\n");
+
+ if (flag)
+ enable_interrupts();
+
+ return 0;
+ } else if (prot == CFG_SST_SECT) {
+ return 1;
+ }
+ }
+
+ /* Start erase on unprotected sectors */
+ for (sect = s_first; sect <= s_last; sect++) {
+ if (info->protect[sect] == 0) { /* not protected */
+
+ addr = (FPWV *) (info->start[sect]);
+
+ printf(".");
+
+ /* arm simple, non interrupt dependent timer */
+ start = get_timer(0);
+
+ switch (flashtype) {
+ case 1:
+ {
+ FPWV *base; /* first address in bank */
+
+ flag = disable_interrupts();
+
+ base = (FPWV *) (CFG_FLASH_BASE); /* First sector */
+
+ base[FLASH_CYCLE1] = 0x00AA; /* unlock */
+ base[FLASH_CYCLE2] = 0x0055; /* unlock */
+ base[FLASH_CYCLE1] = 0x0080; /* erase mode */
+ base[FLASH_CYCLE1] = 0x00AA; /* unlock */
+ base[FLASH_CYCLE2] = 0x0055; /* unlock */
+ *addr = 0x0050; /* erase sector */
+
+ if (flag)
+ enable_interrupts();
+
+ while ((*addr & 0x0080) != 0x0080) {
+ if (get_timer(start) >
+ CFG_FLASH_ERASE_TOUT) {
+ printf("Timeout\n");
+ *addr = 0x00F0; /* reset to read mode */
+
+ rcode = 1;
+ break;
+ }
+ }
+
+ *addr = 0x00F0; /* reset to read mode */
+ break;
+ }
+ } /* switch (flashtype) */
+ }
+ }
+ printf(" done\n");
+
+ if (flag)
+ enable_interrupts();
+
+ return rcode;
+}
+
+int write_buff(flash_info_t * info, uchar * src, ulong addr, ulong cnt)
+{
+ ulong wp, count;
+ u16 data;
+ int rc, port_width;
+
+ if (info->flash_id == FLASH_UNKNOWN)
+ return 4;
+
+ /* get lower word aligned address */
+ wp = addr;
+ port_width = sizeof(FPW);
+
+ /* handle unaligned start bytes */
+ if (wp & 1) {
+ data = *((FPWV *) wp);
+ data = (data << 8) | *src;
+
+ if ((rc = write_word(info, (FPWV *) wp, data)) != 0)
+ return (rc);
+
+ wp++;
+ cnt -= 1;
+ src++;
+ }
+
+ while (cnt >= 2) {
+ /*
+ * handle word aligned part
+ */
+ count = 0;
+ data = *((FPWV *) src);
+
+ if ((rc = write_word(info, (FPWV *) wp, data)) != 0)
+ return (rc);
+
+ wp += 2;
+ src += 2;
+ cnt -= 2;
+
+ if (count++ > 0x800) {
+ spin_wheel();
+ count = 0;
+ }
+ }
+ /* handle word aligned part */
+ if (cnt) {
+ /* handle word aligned part */
+ count = 0;
+ data = *((FPWV *) wp);
+
+ data = (data & 0x00FF) | (*src << 8);
+
+ if ((rc = write_word(info, (FPWV *) wp, data)) != 0)
+ return (rc);
+
+ wp++;
+ src++;
+ cnt -= 1;
+ if (count++ > 0x800) {
+ spin_wheel();
+ count = 0;
+ }
+ }
+
+ if (cnt == 0)
+ return ERR_OK;
+
+ return ERR_OK;
+}
+
+/*-----------------------------------------------------------------------
+ * Write a word to Flash
+ * A word is 16 bits, whichever the bus width of the flash bank
+ * (not an individual chip) is.
+ *
+ * returns:
+ * 0 - OK
+ * 1 - write timeout
+ * 2 - Flash not erased
+ */
+int write_word(flash_info_t * info, FPWV * dest, u16 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 & (u8) data) != (u8) data) {
+ return (2);
+ }
+
+ base = (FPWV *) (CFG_FLASH_BASE);
+
+ /* Disable interrupts which might cause a timeout here */
+ flag = disable_interrupts();
+
+ base[FLASH_CYCLE1] = (u8) 0x00AA00AA; /* unlock */
+ base[FLASH_CYCLE2] = (u8) 0x00550055; /* unlock */
+ base[FLASH_CYCLE1] = (u8) 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 & (u8) 0x00800080) != (data & (u8) 0x00800080)) {
+ if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
+ *dest = (u8) 0x00F000F0; /* reset bank */
+ res = 1;
+ }
+ }
+
+ *dest++ = (u8) 0x00F000F0; /* reset bank */
+
+ return (res);
+}
+
+void inline spin_wheel(void)
+{
+ static int p = 0;
+ static char w[] = "\\/-";
+
+ printf("\010%c", w[p]);
+ (++p == 3) ? (p = 0) : 0;
+}
+
+#endif
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