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-rw-r--r--board/gw8260/flash.c523
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diff --git a/board/gw8260/flash.c b/board/gw8260/flash.c
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+/*
+ * (C) Copyright 2000
+ * Marius Groeger <mgroeger@sysgo.de>
+ * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
+ *
+ * (C) Copyright 2000, 2001
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * (C) Copyright 2001
+ * Advent Networks, Inc. <http://www.adventnetworks.com>
+ * Oliver Brown <oliverb@alumni.utexas.net>
+ *
+ *--------------------------------------------------------------------
+ * 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
+ */
+
+/*********************************************************************/
+/* DESCRIPTION:
+ * This file contains the flash routines for the GW8260 board.
+ *
+ *
+ *
+ * MODULE DEPENDENCY:
+ * None
+ *
+ *
+ * RESTRICTIONS/LIMITATIONS:
+ *
+ * Only supports the following flash devices:
+ * AMD 29F080B
+ * AMD 29F016D
+ *
+ * Copyright (c) 2001, Advent Networks, Inc.
+ *
+ */
+/*********************************************************************/
+
+#include <common.h>
+#include <mpc8260.h>
+
+flash_info_t flash_info[CFG_MAX_FLASH_BANKS];
+
+static ulong flash_get_size (vu_long *addr, flash_info_t *info);
+static int write_word (flash_info_t *info, ulong dest, ulong data);
+
+/*********************************************************************/
+/* functions */
+/*********************************************************************/
+
+/*********************************************************************/
+/* NAME: flash_init() - initializes flash banks */
+/* */
+/* DESCRIPTION: */
+/* This function initializes the flash bank(s). */
+/* */
+/* RETURNS: */
+/* The size in bytes of the flash */
+/* */
+/* RESTRICTIONS/LIMITATIONS: */
+/* */
+/* */
+/*********************************************************************/
+unsigned long flash_init (void)
+{
+ unsigned long size;
+ int i;
+
+ /* Init: no FLASHes known */
+ for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) {
+ flash_info[i].flash_id = FLASH_UNKNOWN;
+ }
+
+ /* for now, only support the 4 MB Flash SIMM */
+ size = flash_get_size((vu_long *)CFG_FLASH0_BASE, &flash_info[0]);
+
+ /*
+ * protect monitor and environment sectors
+ */
+
+#if CFG_MONITOR_BASE >= CFG_FLASH0_BASE
+ flash_protect(FLAG_PROTECT_SET,
+ CFG_MONITOR_BASE,
+ CFG_MONITOR_BASE+CFG_MONITOR_LEN-1,
+ &flash_info[0]);
+#endif
+
+#if (CFG_ENV_IS_IN_FLASH == 1) && defined(CFG_ENV_ADDR)
+# ifndef CFG_ENV_SIZE
+# define CFG_ENV_SIZE CFG_ENV_SECT_SIZE
+# endif
+ flash_protect(FLAG_PROTECT_SET,
+ CFG_ENV_ADDR,
+ CFG_ENV_ADDR + CFG_ENV_SIZE - 1,
+ &flash_info[0]);
+#endif
+
+ return (CFG_FLASH0_SIZE * 1024 * 1024); /*size*/
+}
+
+/*********************************************************************/
+/* NAME: flash_print_info() - prints flash imformation */
+/* */
+/* DESCRIPTION: */
+/* This function prints the flash information. */
+/* */
+/* INPUTS: */
+/* flash_info_t *info - flash information structure */
+/* */
+/* OUTPUTS: */
+/* Displays flash information to console */
+/* */
+/* RETURNS: */
+/* None */
+/* */
+/* RESTRICTIONS/LIMITATIONS: */
+/* */
+/* */
+/*********************************************************************/
+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 >> 16) & 0xff) {
+ case 0x1:
+ printf ("AMD ");
+ break;
+ default:
+ printf ("Unknown Vendor ");
+ break;
+ }
+
+ switch (info->flash_id & FLASH_TYPEMASK) {
+ case AMD_ID_F040B:
+ printf ("AM29F040B (4 Mbit)\n");
+ break;
+ case AMD_ID_F080B:
+ printf ("AM29F080B (8 Mbit)\n");
+ break;
+ case AMD_ID_F016D:
+ printf ("AM29F016D (16 Mbit)\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! */
+/*********************************************************************/
+
+/*********************************************************************/
+/* NAME: flash_get_size() - detects the flash size */
+/* */
+/* DESCRIPTION: */
+/* 1) Reads vendor ID and devices ID from the flash devices. */
+/* 2) Initializes flash info struct. */
+/* 3) Return the flash size */
+/* */
+/* INPUTS: */
+/* vu_long *addr - pointer to start of flash */
+/* flash_info_t *info - flash information structure */
+/* */
+/* OUTPUTS: */
+/* None */
+/* */
+/* RETURNS: */
+/* Size of the flash in bytes, or 0 if device id is unknown. */
+/* */
+/* RESTRICTIONS/LIMITATIONS: */
+/* Only supports the following devices: */
+/* AM29F080D */
+/* AM29F016D */
+/* */
+/*********************************************************************/
+static ulong flash_get_size (vu_long *addr, flash_info_t *info)
+{
+ short i;
+ vu_long vendor, devid;
+ ulong base = (ulong)addr;
+
+ /*printf("addr = %08lx\n", (unsigned long)addr); */
+
+ /* Reset and Write auto select command: read Manufacturer ID */
+ addr[0x0000] = 0xf0f0f0f0;
+ addr[0x0555] = 0xAAAAAAAA;
+ addr[0x02AA] = 0x55555555;
+ addr[0x0555] = 0x90909090;
+ udelay (1000);
+
+ vendor = addr[0];
+ /*printf("vendor = %08lx\n", vendor); */
+ if (vendor != 0x01010101) {
+ info->size = 0;
+ goto out;
+ }
+
+ devid = addr[1];
+ /*printf("devid = %08lx\n", devid); */
+
+ if ((devid & 0xff) == AMD_ID_F080B) {
+ info->flash_id = (vendor & 0xff) << 16 | AMD_ID_F080B;
+ /* we have 16 sectors with 64KB each x 4 */
+ info->sector_count = 16;
+ info->size = 4 * info->sector_count * 64*1024;
+ } else if ((devid & 0xff) == AMD_ID_F016D){
+ info->flash_id = (vendor & 0xff) << 16 | AMD_ID_F016D;
+ /* we have 32 sectors with 64KB each x 4 */
+ info->sector_count = 32;
+ info->size = 4 * info->sector_count * 64*1024;
+ } else {
+ info->size = 0;
+ goto out;
+ }
+ /*printf("sector count = %08x\n", info->sector_count); */
+ /* check for protected sectors */
+ for (i = 0; i < info->sector_count; i++) {
+ /* sector base address */
+ info->start[i] = base + i * (info->size / info->sector_count);
+ /* 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;
+ }
+
+ /* reset command */
+ addr = (vu_long *)info->start[0];
+
+ out:
+ addr[0] = 0xf0f0f0f0;
+
+ /*printf("size = %08x\n", info->size); */
+ return info->size;
+}
+
+/*********************************************************************/
+/* NAME: flash_erase() - erases flash by sector */
+/* */
+/* DESCRIPTION: */
+/* This function erases flash sectors starting for s_first to */
+/* s_last. */
+/* */
+/* INPUTS: */
+/* flash_info_t *info - flash information structure */
+/* int s_first - first sector to erase */
+/* int s_last - last sector to erase */
+/* */
+/* OUTPUTS: */
+/* None */
+/* */
+/* RETURNS: */
+/* Returns 0 for success, 1 for failure. */
+/* */
+/* RESTRICTIONS/LIMITATIONS: */
+/* */
+/*********************************************************************/
+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;
+ }
+
+ 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();
+
+ addr[0x0555] = 0xAAAAAAAA;
+ addr[0x02AA] = 0x55555555;
+ addr[0x0555] = 0x80808080;
+ addr[0x0555] = 0xAAAAAAAA;
+ addr[0x02AA] = 0x55555555;
+ udelay (100);
+
+ /* 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]);
+ addr[0] = 0x30303030;
+ 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]);
+ while ((addr[0] & 0x80808080) != 0x80808080) {
+ 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 */
+ serial_putc ('.');
+ last = now;
+ }
+ }
+
+ DONE:
+ /* reset to read mode */
+ addr = (volatile unsigned long *)info->start[0];
+ addr[0] = 0xF0F0F0F0; /* reset bank */
+
+ printf (" done\n");
+ return 0;
+}
+
+/*********************************************************************/
+/* NAME: write_buff() - writes a buffer to flash */
+/* */
+/* DESCRIPTION: */
+/* This function copies a buffer, *src, to flash. */
+/* */
+/* INPUTS: */
+/* flash_info_t *info - flash information structure */
+/* uchar *src - pointer to buffer to write to flash */
+/* ulong addr - address to start write at */
+/* ulong cnt - number of bytes to write to flash */
+/* */
+/* OUTPUTS: */
+/* None */
+/* */
+/* RETURNS: */
+/* 0 - OK */
+/* 1 - write timeout */
+/* 2 - Flash not erased */
+/* */
+/* RESTRICTIONS/LIMITATIONS: */
+/* */
+/*********************************************************************/
+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));
+}
+
+/*********************************************************************/
+/* NAME: write_word() - writes a word to flash */
+/* */
+/* DESCRIPTION: */
+/* This writes a single word to flash. */
+/* */
+/* INPUTS: */
+/* flash_info_t *info - flash information structure */
+/* ulong dest - address to write */
+/* ulong data - data to write */
+/* */
+/* OUTPUTS: */
+/* None */
+/* */
+/* RETURNS: */
+/* 0 - OK */
+/* 1 - write timeout */
+/* 2 - Flash not erased */
+/* */
+/* RESTRICTIONS/LIMITATIONS: */
+/* */
+/*********************************************************************/
+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();
+
+ addr[0x0555] = 0xAAAAAAAA;
+ addr[0x02AA] = 0x55555555;
+ addr[0x0555] = 0xA0A0A0A0;
+
+ *((vu_long *)dest) = data;
+
+ /* re-enable interrupts if necessary */
+ if (flag)
+ enable_interrupts();
+
+ /* data polling for D7 */
+ start = get_timer (0);
+ while ((*((vu_long *)dest) & 0x80808080) != (data & 0x80808080)) {
+ if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
+ return (1);
+ }
+ }
+ return (0);
+}
+/*********************************************************************/
+/* End of flash.c */
+/*********************************************************************/
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