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@@ -0,0 +1,431 @@
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+/*
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+ * (C) Copyright 2002
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+ * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
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+ * Alex Zuepke <azu@sysgo.de>
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+ *
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+ * See file CREDITS for list of people who contributed to this
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+ * project.
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+ *
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+ * This program is free software; you can redistribute it and/or
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+ * modify it under the terms of the GNU General Public License as
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+ * published by the Free Software Foundation; either version 2 of
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+ * the License, or (at your option) any later version.
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+ *
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+ * This program is distributed in the hope that it will be useful,
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+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+ * GNU General Public License for more details.
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+ *
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+ * You should have received a copy of the GNU General Public License
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+ * along with this program; if not, write to the Free Software
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+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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+ * MA 02111-1307 USA
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+ */
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+
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+#include <common.h>
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+
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+ulong myflush (void);
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+
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+#define FLASH_BANK_SIZE PHYS_FLASH_SIZE
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+#define MAIN_SECT_SIZE 0x10000 /* 64 KB */
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+
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+flash_info_t flash_info[CFG_MAX_FLASH_BANKS];
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+
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+#define CMD_READ_ARRAY 0x000000F0
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+#define CMD_UNLOCK1 0x000000AA
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+#define CMD_UNLOCK2 0x00000055
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+#define CMD_ERASE_SETUP 0x00000080
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+#define CMD_ERASE_CONFIRM 0x00000030
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+#define CMD_PROGRAM 0x000000A0
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+#define CMD_UNLOCK_BYPASS 0x00000020
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+
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+#define MEM_FLASH_ADDR1 (*(volatile u16 *)(CFG_FLASH_BASE + (0x00000555 << 1)))
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+#define MEM_FLASH_ADDR2 (*(volatile u16 *)(CFG_FLASH_BASE + (0x000002AA << 1)))
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+
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+#define BIT_ERASE_DONE 0x00000080
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+#define BIT_RDY_MASK 0x00000080
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+#define BIT_PROGRAM_ERROR 0x00000020
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+#define BIT_TIMEOUT 0x80000000 /* our flag */
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+
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+#define READY 1
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+#define ERR 2
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+#define TMO 4
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+
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+/*-----------------------------------------------------------------------
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+ */
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+
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+ulong flash_init (void)
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+{
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+ int i, j;
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+ ulong size = 0;
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+
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+ for (i = 0; i < CFG_MAX_FLASH_BANKS; i++) {
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+ ulong flashbase = 0;
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+
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+ flash_info[i].flash_id =
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+#if defined(CONFIG_AMD_LV400)
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+ (AMD_MANUFACT & FLASH_VENDMASK) |
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+ (AMD_ID_LV400B & FLASH_TYPEMASK);
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+#elif defined(CONFIG_AMD_LV800)
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+ (AMD_MANUFACT & FLASH_VENDMASK) |
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+ (AMD_ID_LV800B & FLASH_TYPEMASK);
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+#else
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+#error "Unknown flash configured"
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+#endif
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+ flash_info[i].size = FLASH_BANK_SIZE;
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+ flash_info[i].sector_count = CFG_MAX_FLASH_SECT;
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+ memset (flash_info[i].protect, 0, CFG_MAX_FLASH_SECT);
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+ if (i == 0)
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+ flashbase = PHYS_FLASH_1;
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+ else
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+ panic ("configured too many flash banks!\n");
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+ for (j = 0; j < flash_info[i].sector_count; j++) {
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+ if (j <= 3) {
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+ /* 1st one is 16 KB */
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+ if (j == 0) {
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+ flash_info[i].start[j] =
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+ flashbase + 0;
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+ }
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+
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+ /* 2nd and 3rd are both 8 KB */
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+ if ((j == 1) || (j == 2)) {
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+ flash_info[i].start[j] =
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+ flashbase + 0x4000 + (j -
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+ 1) *
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+ 0x2000;
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+ }
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+
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+ /* 4th 32 KB */
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+ if (j == 3) {
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+ flash_info[i].start[j] =
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+ flashbase + 0x8000;
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+ }
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+ } else {
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+ flash_info[i].start[j] =
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+ flashbase + (j - 3) * MAIN_SECT_SIZE;
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+ }
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+ }
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+ size += flash_info[i].size;
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+ }
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+
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+ flash_protect (FLAG_PROTECT_SET,
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+ CFG_FLASH_BASE,
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+ CFG_FLASH_BASE + monitor_flash_len - 1,
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+ &flash_info[0]);
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+
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+ flash_protect (FLAG_PROTECT_SET,
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+ CFG_ENV_ADDR,
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+ CFG_ENV_ADDR + CFG_ENV_SIZE - 1, &flash_info[0]);
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+
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+ return size;
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+}
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+
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+/*-----------------------------------------------------------------------
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+ */
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+void flash_print_info (flash_info_t * info)
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+{
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+ int i;
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+
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+ switch (info->flash_id & FLASH_VENDMASK) {
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+ case (AMD_MANUFACT & FLASH_VENDMASK):
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+ printf ("AMD: ");
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+ break;
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+ default:
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+ printf ("Unknown Vendor ");
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+ break;
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+ }
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+
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+ switch (info->flash_id & FLASH_TYPEMASK) {
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+ case (AMD_ID_LV400B & FLASH_TYPEMASK):
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+ printf ("1x Amd29LV400BB (4Mbit)\n");
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+ break;
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+ case (AMD_ID_LV800B & FLASH_TYPEMASK):
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+ printf ("1x Amd29LV800BB (8Mbit)\n");
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+ break;
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+ default:
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+ printf ("Unknown Chip Type\n");
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+ goto Done;
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+ break;
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+ }
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+
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+ printf (" Size: %ld MB in %d Sectors\n",
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+ info->size >> 20, info->sector_count);
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+
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+ printf (" Sector Start Addresses:");
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+ for (i = 0; i < info->sector_count; i++) {
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+ if ((i % 5) == 0) {
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+ printf ("\n ");
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+ }
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+ printf (" %08lX%s", info->start[i],
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+ info->protect[i] ? " (RO)" : " ");
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+ }
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+ printf ("\n");
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+
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+ Done:;
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+}
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+
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+/*-----------------------------------------------------------------------
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+ */
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+
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+int flash_erase (flash_info_t * info, int s_first, int s_last)
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+{
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+ ushort result;
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+ int iflag, cflag, prot, sect;
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+ int rc = ERR_OK;
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+ int chip;
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+
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+ /* first look for protection bits */
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+
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+ if (info->flash_id == FLASH_UNKNOWN)
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+ return ERR_UNKNOWN_FLASH_TYPE;
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+
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+ if ((s_first < 0) || (s_first > s_last)) {
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+ return ERR_INVAL;
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+ }
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+
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+ if ((info->flash_id & FLASH_VENDMASK) !=
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+ (AMD_MANUFACT & FLASH_VENDMASK)) {
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+ return ERR_UNKNOWN_FLASH_VENDOR;
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+ }
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+
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+ prot = 0;
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+ for (sect = s_first; sect <= s_last; ++sect) {
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+ if (info->protect[sect]) {
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+ prot++;
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+ }
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+ }
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+ if (prot)
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+ return ERR_PROTECTED;
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+
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+ /*
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+ * Disable interrupts which might cause a timeout
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+ * here. Remember that our exception vectors are
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+ * at address 0 in the flash, and we don't want a
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+ * (ticker) exception to happen while the flash
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+ * chip is in programming mode.
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+ */
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+ cflag = icache_status ();
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+ icache_disable ();
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+ iflag = disable_interrupts ();
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+
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+ /* Start erase on unprotected sectors */
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+ for (sect = s_first; sect <= s_last && !ctrlc (); sect++) {
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+ printf ("Erasing sector %2d ... ", sect);
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+
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+ /* arm simple, non interrupt dependent timer */
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+ reset_timer_masked ();
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+
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+ if (info->protect[sect] == 0) { /* not protected */
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+ vu_short *addr = (vu_short *) (info->start[sect]);
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+
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+ MEM_FLASH_ADDR1 = CMD_UNLOCK1;
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+ MEM_FLASH_ADDR2 = CMD_UNLOCK2;
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+ MEM_FLASH_ADDR1 = CMD_ERASE_SETUP;
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+
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+ MEM_FLASH_ADDR1 = CMD_UNLOCK1;
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+ MEM_FLASH_ADDR2 = CMD_UNLOCK2;
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+ *addr = CMD_ERASE_CONFIRM;
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+
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+ /* wait until flash is ready */
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+ chip = 0;
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+
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+ do {
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+ result = *addr;
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+
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+ /* check timeout */
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+ if (get_timer_masked () >
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+ CFG_FLASH_ERASE_TOUT) {
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+ MEM_FLASH_ADDR1 = CMD_READ_ARRAY;
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+ chip = TMO;
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+ break;
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+ }
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+
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+ if (!chip
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+ && (result & 0xFFFF) & BIT_ERASE_DONE)
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+ chip = READY;
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+
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+ if (!chip
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+ && (result & 0xFFFF) & BIT_PROGRAM_ERROR)
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+ chip = ERR;
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+
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+ } while (!chip);
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+
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+ MEM_FLASH_ADDR1 = CMD_READ_ARRAY;
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+
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+ if (chip == ERR) {
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+ rc = ERR_PROG_ERROR;
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+ goto outahere;
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+ }
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+ if (chip == TMO) {
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+ rc = ERR_TIMOUT;
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+ goto outahere;
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+ }
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+
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+ printf ("ok.\n");
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+ } else { /* it was protected */
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+
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+ printf ("protected!\n");
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+ }
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+ }
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+
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+ if (ctrlc ())
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+ printf ("User Interrupt!\n");
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+
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+ outahere:
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+ /* allow flash to settle - wait 10 ms */
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+ udelay_masked (10000);
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+
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+ if (iflag)
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+ enable_interrupts ();
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+
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+ if (cflag)
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+ icache_enable ();
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+
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+ return rc;
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+}
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+
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+/*-----------------------------------------------------------------------
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+ * Copy memory to flash
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+ */
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+
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+volatile static int write_hword (flash_info_t * info, ulong dest, ushort data)
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+{
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+ vu_short *addr = (vu_short *) dest;
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+ ushort result;
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+ int rc = ERR_OK;
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+ int cflag, iflag;
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+ int chip;
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+
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+ /*
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+ * Check if Flash is (sufficiently) erased
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+ */
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+ result = *addr;
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+ if ((result & data) != data)
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+ return ERR_NOT_ERASED;
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+
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+
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+ /*
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+ * Disable interrupts which might cause a timeout
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+ * here. Remember that our exception vectors are
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+ * at address 0 in the flash, and we don't want a
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+ * (ticker) exception to happen while the flash
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+ * chip is in programming mode.
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+ */
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+ cflag = icache_status ();
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+ icache_disable ();
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+ iflag = disable_interrupts ();
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+
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+ MEM_FLASH_ADDR1 = CMD_UNLOCK1;
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+ MEM_FLASH_ADDR2 = CMD_UNLOCK2;
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+ MEM_FLASH_ADDR1 = CMD_UNLOCK_BYPASS;
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+ *addr = CMD_PROGRAM;
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+ *addr = data;
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+
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+ /* arm simple, non interrupt dependent timer */
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+ reset_timer_masked ();
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+
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+ /* wait until flash is ready */
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+ chip = 0;
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+ do {
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+ result = *addr;
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+
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+ /* check timeout */
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+ if (get_timer_masked () > CFG_FLASH_ERASE_TOUT) {
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+ chip = ERR | TMO;
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+ break;
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+ }
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+ if (!chip && ((result & 0x80) == (data & 0x80)))
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+ chip = READY;
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+
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+ if (!chip && ((result & 0xFFFF) & BIT_PROGRAM_ERROR)) {
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+ result = *addr;
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+
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+ if ((result & 0x80) == (data & 0x80))
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+ chip = READY;
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+ else
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+ chip = ERR;
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+ }
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+
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+ } while (!chip);
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+
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+ *addr = CMD_READ_ARRAY;
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+
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+ if (chip == ERR || *addr != data)
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+ rc = ERR_PROG_ERROR;
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+
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+ if (iflag)
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+ enable_interrupts ();
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+
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+ if (cflag)
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+ icache_enable ();
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+
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+ return rc;
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+}
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+
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+/*-----------------------------------------------------------------------
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+ * Copy memory to flash.
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+ */
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+
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+int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
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+{
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+ ulong cp, wp;
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+ int l;
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+ int i, rc;
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+ ushort data;
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+
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+ wp = (addr & ~1); /* get lower word aligned address */
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+
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+ /*
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+ * handle unaligned start bytes
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+ */
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+ if ((l = addr - wp) != 0) {
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+ data = 0;
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+ for (i = 0, cp = wp; i < l; ++i, ++cp) {
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+ data = (data >> 8) | (*(uchar *) cp << 8);
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+ }
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+ for (; i < 2 && cnt > 0; ++i) {
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+ data = (data >> 8) | (*src++ << 8);
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+ --cnt;
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+ ++cp;
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+ }
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+ for (; cnt == 0 && i < 2; ++i, ++cp) {
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+ data = (data >> 8) | (*(uchar *) cp << 8);
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+ }
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+
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+ if ((rc = write_hword (info, wp, data)) != 0) {
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+ return (rc);
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+ }
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+ wp += 2;
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+ }
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+
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+ /*
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+ * handle word aligned part
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+ */
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+ while (cnt >= 2) {
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+ data = *((vu_short *) src);
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+ if ((rc = write_hword (info, wp, data)) != 0) {
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+ return (rc);
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+ }
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+ src += 2;
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+ wp += 2;
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+ cnt -= 2;
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+ }
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+
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+ if (cnt == 0) {
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+ return ERR_OK;
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+ }
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+
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+ /*
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+ * handle unaligned tail bytes
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+ */
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+ data = 0;
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+ for (i = 0, cp = wp; i < 2 && cnt > 0; ++i, ++cp) {
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+ data = (data >> 8) | (*src++ << 8);
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+ --cnt;
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+ }
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+ for (; i < 2; ++i, ++cp) {
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+ data = (data >> 8) | (*(uchar *) cp << 8);
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+ }
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+
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+ return write_hword (info, wp, data);
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+}
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Wolfgang Denk