--- /dev/null
+/*
+ * (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
+ */
+
+/* #define DEBUG */
+
+#include <common.h>
+#include <flash.h>
+
+#if !defined(CFG_NO_FLASH)
+
+extern flash_info_t flash_info[]; /* info for FLASH chips */
+
+/*-----------------------------------------------------------------------
+ * Functions
+ */
+
+/*-----------------------------------------------------------------------
+ * Set protection status for monitor sectors
+ *
+ * The monitor is always located in the _first_ Flash bank.
+ * If necessary you have to map the second bank at lower addresses.
+ */
+void
+flash_protect (int flag, ulong from, ulong to, flash_info_t *info)
+{
+ ulong b_end = info->start[0] + info->size - 1; /* bank end address */
+ short s_end = info->sector_count - 1; /* index of last sector */
+ int i;
+
+ debug ("flash_protect %s: from 0x%08lX to 0x%08lX\n",
+ (flag & FLAG_PROTECT_SET) ? "ON" :
+ (flag & FLAG_PROTECT_CLEAR) ? "OFF" : "???",
+ from, to);
+
+ /* Do nothing if input data is bad. */
+ if (info->sector_count == 0 || info->size == 0 || to < from) {
+ return;
+ }
+
+ /* There is nothing to do if we have no data about the flash
+ * or the protect range and flash range don't overlap.
+ */
+ if (info->flash_id == FLASH_UNKNOWN ||
+ to < info->start[0] || from > b_end) {
+ return;
+ }
+
+ for (i=0; i<info->sector_count; ++i) {
+ ulong end; /* last address in current sect */
+
+ end = (i == s_end) ? b_end : info->start[i + 1] - 1;
+
+ /* Update protection if any part of the sector
+ * is in the specified range.
+ */
+ if (from <= end && to >= info->start[i]) {
+ if (flag & FLAG_PROTECT_CLEAR) {
+#if defined(CFG_FLASH_PROTECTION)
+ flash_real_protect(info, i, 0);
+#else
+ info->protect[i] = 0;
+#endif /* CFG_FLASH_PROTECTION */
+ debug ("protect off %d\n", i);
+ }
+ else if (flag & FLAG_PROTECT_SET) {
+#if defined(CFG_FLASH_PROTECTION)
+ flash_real_protect(info, i, 1);
+#else
+ info->protect[i] = 1;
+#endif /* CFG_FLASH_PROTECTION */
+ debug ("protect on %d\n", i);
+ }
+ }
+ }
+}
+
+/*-----------------------------------------------------------------------
+ */
+
+flash_info_t *
+addr2info (ulong addr)
+{
+#ifndef CONFIG_SPD823TS
+ flash_info_t *info;
+ int i;
+
+ for (i=0, info=&flash_info[0]; i<CFG_MAX_FLASH_BANKS; ++i, ++info) {
+ if (info->flash_id != FLASH_UNKNOWN &&
+ addr >= info->start[0] &&
+ /* WARNING - The '- 1' is needed if the flash
+ * is at the end of the address space, since
+ * info->start[0] + info->size wraps back to 0.
+ * Please don't change this unless you understand this.
+ */
+ addr <= info->start[0] + info->size - 1) {
+ return (info);
+ }
+ }
+#endif /* CONFIG_SPD823TS */
+
+ return (NULL);
+}
+
+/*-----------------------------------------------------------------------
+ * Copy memory to flash.
+ * Make sure all target addresses are within Flash bounds,
+ * and no protected sectors are hit.
+ * Returns:
+ * ERR_OK 0 - OK
+ * ERR_TIMOUT 1 - write timeout
+ * ERR_NOT_ERASED 2 - Flash not erased
+ * ERR_PROTECTED 4 - target range includes protected sectors
+ * ERR_INVAL 8 - target address not in Flash memory
+ * ERR_ALIGN 16 - target address not aligned on boundary
+ * (only some targets require alignment)
+ */
+int
+flash_write (char *src, ulong addr, ulong cnt)
+{
+#ifdef CONFIG_SPD823TS
+ return (ERR_TIMOUT); /* any other error codes are possible as well */
+#else
+ int i;
+ ulong end = addr + cnt - 1;
+ flash_info_t *info_first = addr2info (addr);
+ flash_info_t *info_last = addr2info (end );
+ flash_info_t *info;
+
+ if (cnt == 0) {
+ return (ERR_OK);
+ }
+
+ if (!info_first || !info_last) {
+ return (ERR_INVAL);
+ }
+
+ for (info = info_first; info <= info_last; ++info) {
+ ulong b_end = info->start[0] + info->size; /* bank end addr */
+ short s_end = info->sector_count - 1;
+ for (i=0; i<info->sector_count; ++i) {
+ ulong e_addr = (i == s_end) ? b_end : info->start[i + 1];
+
+ if ((end >= info->start[i]) && (addr < e_addr) &&
+ (info->protect[i] != 0) ) {
+ return (ERR_PROTECTED);
+ }
+ }
+ }
+
+ /* finally write data to flash */
+ for (info = info_first; info <= info_last && cnt>0; ++info) {
+ ulong len;
+
+ len = info->start[0] + info->size - addr;
+ if (len > cnt)
+ len = cnt;
+ if ((i = write_buff(info, (uchar *)src, addr, len)) != 0) {
+ return (i);
+ }
+ cnt -= len;
+ addr += len;
+ src += len;
+ }
+ return (ERR_OK);
+#endif /* CONFIG_SPD823TS */
+}
+
+/*-----------------------------------------------------------------------
+ */
+
+void flash_perror (int err)
+{
+ switch (err) {
+ case ERR_OK:
+ break;
+ case ERR_TIMOUT:
+ puts ("Timeout writing to Flash\n");
+ break;
+ case ERR_NOT_ERASED:
+ puts ("Flash not Erased\n");
+ break;
+ case ERR_PROTECTED:
+ puts ("Can't write to protected Flash sectors\n");
+ break;
+ case ERR_INVAL:
+ puts ("Outside available Flash\n");
+ break;
+ case ERR_ALIGN:
+ puts ("Start and/or end address not on sector boundary\n");
+ break;
+ case ERR_UNKNOWN_FLASH_VENDOR:
+ puts ("Unknown Vendor of Flash\n");
+ break;
+ case ERR_UNKNOWN_FLASH_TYPE:
+ puts ("Unknown Type of Flash\n");
+ break;
+ case ERR_PROG_ERROR:
+ puts ("General Flash Programming Error\n");
+ break;
+ default:
+ printf ("%s[%d] FIXME: rc=%d\n", __FILE__, __LINE__, err);
+ break;
+ }
+}
+
+/*-----------------------------------------------------------------------
+ */
+#endif /* !CFG_NO_FLASH */
projects / openwrt / openwrt.git / blobdiff