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@@ -0,0 +1,536 @@
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+/*
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+ * (C) Copyright 2002
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+ * MAZeT GmbH <www.mazet.de>
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+ * Stephan Linz <linz@mazet.de>, <linz@li-pro.net>
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+ *
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+ * The most stuff comes from PPCBoot and Linux.
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+ *
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+ * IMMS gGmbH <www.imms.de>
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+ * Thomas Elste <info@elste.org>
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+ *
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+ * Modifications for ModNET50 Board
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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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+#include <asm/arch/netarm_registers.h>
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+
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+#define SCR (*(volatile unsigned int *)(NETARM_GEN_MODULE_BASE + NETARM_GEN_SYSTEM_CONTROL))
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+
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+#define ALIGN_ABORT_OFF SCR = SCR & ~NETARM_GEN_SYS_CFG_ALIGN_ABORT
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+#define ALIGN_ABORT_ON SCR = SCR | NETARM_GEN_SYS_CFG_ALIGN_ABORT
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+
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+#define PROG_ADDR (0x555*2)
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+#define SETUP_ADDR (0x555*2)
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+#define ID_ADDR (0x555*2)
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+#define UNLOCK_ADDR1 (0x555*2)
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+#define UNLOCK_ADDR2 (0x2AA*2)
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+
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+#define UNLOCK_CMD1 (0xAA)
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+#define UNLOCK_CMD2 (0x55)
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+#define ERASE_SUSPEND_CMD (0xB0)
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+#define ERASE_RESUME_CMD (0x30)
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+#define RESET_CMD (0xF0)
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+#define ID_CMD (0x90)
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+#define SECERASE_CMD (0x30)
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+#define CHIPERASE_CMD (0x10)
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+#define PROG_CMD (0xa0)
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+#define SETUP_CMD (0x80)
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+
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+#define DQ2 (0x04)
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+#define DQ3 (DQ2*2)
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+#define DQ5 (DQ3*4)
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+#define DQ6 (DQ5*2)
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+
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+#define WRITE_UNLOCK(addr) { \
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+ *(volatile __u16*)(addr + UNLOCK_ADDR1) = (__u16)UNLOCK_CMD1; \
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+ *(volatile __u16*)(addr + UNLOCK_ADDR2) = (__u16)UNLOCK_CMD2; \
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+}
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+
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+#define CONFIG_AM29_RESERVED (0)
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+#define K (1024)
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+#define MB (4)
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+
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+#define CELL_SIZE (64*K)
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+#define DEVICE_SIZE (MB*K*K)
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+#define CELLS_PER_DEVICE (DEVICE_SIZE/CELL_SIZE)
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+#define RESERVED_CELLS (CONFIG_AM29_RESERVED*K)/CELL_SIZE
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+#define MAX_FLASH_DEVICES (1)
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+#define AVAIL_SIZE (DEVICE_SIZE*MAX_FLASH_DEVICES - RESERVED_CELLS*CELL_SIZE)
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+
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+
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+flash_info_t flash_info[CFG_MAX_FLASH_BANKS];
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+static __u16 toggling_bits;
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+
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+
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+/*-----------------------------------------------------------------------
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+ */
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+ulong flash_get_size (ulong baseaddr, flash_info_t * info)
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+{
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+ short i;
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+ __u16 flashtest;
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+
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+ /* Write auto select command sequence and test FLASH answer */
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+ WRITE_UNLOCK (baseaddr);
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+ *(volatile __u16 *) (baseaddr + ID_ADDR) = (__u16) ID_CMD;
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+ flashtest /* manufacturer ID */ = *(volatile __u16 *) (baseaddr);
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+ *(volatile __u16 *) (baseaddr + ID_ADDR) = (__u16) RESET_CMD;
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+
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+ switch ((__u32) ((flashtest << 16) + flashtest)) {
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+ case AMD_MANUFACT:
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+ info->flash_id = FLASH_MAN_AMD & FLASH_VENDMASK;
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+ break;
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+ case FUJ_MANUFACT:
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+ info->flash_id = FLASH_MAN_FUJ & FLASH_VENDMASK;
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+ break;
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+ default:
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+ info->flash_id = FLASH_UNKNOWN;
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+ info->sector_count = 0;
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+ info->size = 0;
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+ return (0); /* no or unknown flash */
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+ }
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+
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+ /* Write auto select command sequence and test FLASH answer */
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+ WRITE_UNLOCK (baseaddr);
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+ *(volatile __u16 *) (baseaddr + ID_ADDR) = (__u16) ID_CMD;
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+ flashtest /* device ID */ = *(volatile __u16 *) (baseaddr + 2);
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+ *(volatile __u16 *) (baseaddr + ID_ADDR) = (__u16) RESET_CMD;
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+
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+ /* toggling_bits = (flashtest == TOSHIBA)?(DQ6):(DQ2|DQ6); */
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+ toggling_bits = (DQ2 | DQ6);
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+
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+ switch ((__u32) ((flashtest << 16) + flashtest)) {
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+ case AMD_ID_LV160B:
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+ info->flash_id +=
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+ (FLASH_AM160LV | FLASH_AM160B) & FLASH_TYPEMASK;
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+ info->sector_count = CFG_MAX_FLASH_SECT;
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+ info->size = CFG_FLASH_SIZE;
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+ /* 1*16K Boot Block
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+ 2*8K Parameter Block
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+ 1*32K Small Main Block */
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+ info->start[0] = baseaddr;
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+ info->start[1] = baseaddr + 0x4000;
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+ info->start[2] = baseaddr + 0x6000;
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+ info->start[3] = baseaddr + 0x8000;
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+ for (i = 1; i < info->sector_count; i++)
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+ info->start[3 + i] = baseaddr + i * CFG_MAIN_SECT_SIZE;
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+ break;
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+ default:
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+ info->flash_id = FLASH_UNKNOWN;
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+ return (0); /* no or unknown flash */
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+ }
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+
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+ for (i = 0; i < info->sector_count; i++) {
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+ /* Write auto select command sequence and test FLASH answer */
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+ WRITE_UNLOCK (info->start[i]);
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+ *(volatile __u16 *) (info->start[i] + ID_ADDR) = (__u16) ID_CMD;
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+ flashtest /* protected verify */ = *(volatile __u16 *) (info->start[i] + 4);
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+ *(volatile __u16 *) (info->start[i] + ID_ADDR) = (__u16) RESET_CMD;
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+ if (flashtest & 0x0001) {
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+ info->protect[i] = 1; /* D0 = 1 if protected */
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+ } else {
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+ info->protect[i] = 0;
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+ }
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+ }
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+ return (info->size);
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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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+ ulong size = 0;
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+ int i;
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+
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+ /* Init: no FLASHes known */
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+ for (i = 0; i < CFG_MAX_FLASH_BANKS; ++i) {
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+ flash_info[i].flash_id = FLASH_UNKNOWN;
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+ }
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+
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+ /* Static FLASH Bank configuration here (only one bank) */
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+ size = flash_get_size (CFG_FLASH_BASE, &flash_info[0]);
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+
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+ if (flash_info[0].flash_id == FLASH_UNKNOWN || size == 0) {
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+ printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
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+ size, size >> 20);
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+ }
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+
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+ /*
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+ * protect monitor and environment sectors
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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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+ if (info->flash_id == FLASH_UNKNOWN) {
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+ printf ("missing or unknown FLASH type\n");
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+ return;
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+ }
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+
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+ switch (info->flash_id & FLASH_VENDMASK) {
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+ case FLASH_MAN_AMD:
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+ printf ("AMD ");
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+ break;
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+ case FLASH_MAN_FUJ:
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+ printf ("Fujitsu ");
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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 FLASH_AMDL323B:
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+ printf ("29DL323B (32 M, bottom sector)\n");
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+ break;
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+ case (FLASH_AM160LV | FLASH_AM160B):
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+ printf ("29LV160BE (1M x 16, bottom sector)\n");
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+ break;
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+ default:
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+ printf ("Unknown Chip Type\n");
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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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+ printf (" Sector Start Addresses:");
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+ for (i = 0; i < info->sector_count; i++) {
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+ if ((i % 4) == 0)
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+ printf ("\n ");
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+ printf (" S%02d @ 0x%08lX%s", i,
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+ info->start[i], info->protect[i] ? " !" : " ");
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+ }
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+ printf ("\n");
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+ return;
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+}
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+
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+/*-----------------------------------------------------------------------
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+ */
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+int flash_check_protection (flash_info_t * info, int s_first, int s_last)
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+{
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+ int sect, prot = 0;
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+
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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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+ if (prot)
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+ printf ("- can't erase %d protected sectors\n", prot);
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+ return prot;
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+}
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+
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+/*-----------------------------------------------------------------------
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+ */
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+int flash_check_erase_amd (ulong start)
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+{
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+ __u16 v1, v2;
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+
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+ v1 = *(volatile __u16 *) (start);
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+ v2 = *(volatile __u16 *) (start);
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+
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+ if (((v1 ^ v2) & toggling_bits) == toggling_bits) {
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+ if (((v1 | v2) & DQ5) == DQ5) {
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+ printf ("[DQ5] ");
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+ /* OOPS: exceeded timing limits */
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+
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+ v1 = *(volatile __u16 *) (start);
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+ v2 = *(volatile __u16 *) (start);
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+
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+ if (((v1 ^ v2) & toggling_bits) == toggling_bits) {
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+
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+ printf ("[%s] ",
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+ ((toggling_bits & (DQ2 | DQ6)) ==
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+ (DQ2 | DQ6)) ? "DQ2,DQ6" : "DQ6");
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+
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+ /* OOPS: there is an erasure in progress,
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+ * try to reset chip */
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+ *(volatile __u16 *) (start) =
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+ (__u16) RESET_CMD;
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+
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+ return 1; /* still busy */
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+ }
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+ }
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+ return 1; /* still busy */
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+ }
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+ return 0; /* be free */
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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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+ int flag, sect, setup_offset = 0;
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+ int rc = ERR_OK;
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+
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+ if (info->flash_id == FLASH_UNKNOWN) {
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+ printf ("- missing\n");
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+ return ERR_UNKNOWN_FLASH_TYPE;
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+ }
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+
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+ if ((s_first < 0) || (s_first > s_last)) {
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+ printf ("- no sectors to erase\n");
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+ return ERR_INVAL;
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+ }
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+
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+ if (flash_check_protection (info, s_first, s_last))
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+ return ERR_PROTECTED;
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+
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+ switch (info->flash_id & FLASH_VENDMASK) {
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+ case FLASH_MAN_FUJ:
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+ case FLASH_MAN_AMD:
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+ switch (info->flash_id & FLASH_TYPEMASK) {
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+ case (FLASH_AM160LV | FLASH_AM160B):
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+ setup_offset = UNLOCK_ADDR1; /* just the adress for setup_cmd differs */
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+ case FLASH_AMDL323B:
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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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+ flag = disable_interrupts ();
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+ /* Start erase on unprotected sectors */
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+ for (sect = s_first; sect <= s_last && !ctrlc ();
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+ sect++) {
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+ printf ("Erasing sector %2d ... ", sect);
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+
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+ if (info->protect[sect] == 0) {
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+ /* not protected */
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+ /* Write sector erase command sequence */
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+ WRITE_UNLOCK (info->start[0]);
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+ *(volatile __u16 *) (info->start[0] +
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+ setup_offset) =
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+ (__u16) SETUP_CMD;
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+ WRITE_UNLOCK (info->start[0]);
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+ *(volatile __u16 *) (info->
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+ start[sect]) =
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+ (__u16) SECERASE_CMD;
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+
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+ /* wait some time */
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+ reset_timer_masked ();
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+ while (get_timer_masked () < 1000) {
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+ }
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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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+ while (flash_check_erase_amd (info->start[sect])) {
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+ if (get_timer_masked () > CFG_FLASH_ERASE_TOUT) {
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+ printf ("timeout!\n");
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+ /* OOPS: reach timeout,
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+ * try to reset chip
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+ */
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+ *(volatile __u16 *) (info-> start[sect]) = (__u16) RESET_CMD;
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+ rc = ERR_TIMOUT;
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+ goto outahere_323B;
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+ }
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+ }
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+ printf ("ok.\n");
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+ } else {
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+ printf ("protected!\n");
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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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+outahere_323B:
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+ /* allow flash to settle - wait 10 ms */
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+ udelay_masked (10000);
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+ if (flag)
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+ enable_interrupts ();
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+ return rc;
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+ default:
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+ printf ("- unknown chip type\n");
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+ return ERR_UNKNOWN_FLASH_TYPE;
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+ }
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+ break;
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+ default:
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+ printf ("- unknown vendor ");
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+ return ERR_UNKNOWN_FLASH_VENDOR;
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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_check_write_amd (ulong dest)
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+{
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+ __u16 v1, v2;
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+
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+ v1 = *(volatile __u16 *) (dest);
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+ v2 = *(volatile __u16 *) (dest);
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+
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+ /* DQ6 toggles during write */
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+ if (((v1 ^ v2) & DQ6) == DQ6) {
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+ if (((v1 | v2) & DQ5) == DQ5) {
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+ printf ("[DQ5] @ %08lX\n", dest);
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+
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+ /* OOPS: exceeded timing limits,
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+ * try to reset chip */
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+ *(volatile __u16 *) (dest) = (__u16) RESET_CMD;
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+ return 0; /* be free */
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+ }
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+ return 1; /* still busy */
|
|
|
+ }
|
|
|
+
|
|
|
+ return 0; /* be free */
|
|
|
+}
|
|
|
+
|
|
|
+/*-----------------------------------------------------------------------
|
|
|
+ * Copy memory to flash
|
|
|
+ */
|
|
|
+static int write_word (flash_info_t * info, ulong dest, ushort data)
|
|
|
+{
|
|
|
+ int rc = ERR_OK;
|
|
|
+ int flag;
|
|
|
+
|
|
|
+ /* Check if Flash is (sufficiently) erased */
|
|
|
+ if ((*(__u16 *) (dest) & data) != data)
|
|
|
+ return ERR_NOT_ERASED;
|
|
|
+
|
|
|
+ /*
|
|
|
+ * Disable interrupts which might cause a timeout
|
|
|
+ * here. Remember that our exception vectors are
|
|
|
+ * at address 0 in the flash, and we don't want a
|
|
|
+ * (ticker) exception to happen while the flash
|
|
|
+ * chip is in programming mode.
|
|
|
+ */
|
|
|
+ flag = disable_interrupts ();
|
|
|
+
|
|
|
+ /* Write program command sequence */
|
|
|
+ WRITE_UNLOCK (info->start[0]);
|
|
|
+
|
|
|
+ /* Flash dependend program seqence */
|
|
|
+ switch (info->flash_id & FLASH_VENDMASK) {
|
|
|
+ case FLASH_MAN_FUJ:
|
|
|
+ case FLASH_MAN_AMD:
|
|
|
+ switch (info->flash_id & FLASH_TYPEMASK) {
|
|
|
+ case (FLASH_AM160LV | FLASH_AM160B):
|
|
|
+ *(volatile __u16 *) (info->start[0] + UNLOCK_ADDR1) =
|
|
|
+ (__u16) PROG_CMD;
|
|
|
+ *(volatile __u16 *) (dest) = (__u16) data;
|
|
|
+ break;
|
|
|
+ case FLASH_AMDL323B:
|
|
|
+ *(volatile __u16 *) (dest) = (__u16) PROG_CMD;
|
|
|
+ *(volatile __u16 *) (dest) = (__u16) data;
|
|
|
+ break;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ /* arm simple, non interrupt dependent timer */
|
|
|
+ reset_timer_masked ();
|
|
|
+
|
|
|
+ while (flash_check_write_amd (dest)) {
|
|
|
+ if (get_timer_masked () > CFG_FLASH_WRITE_TOUT) {
|
|
|
+ printf ("timeout! @ %08lX\n", dest);
|
|
|
+ /* OOPS: reach timeout,
|
|
|
+ * try to reset chip */
|
|
|
+ *(volatile __u16 *) (dest) = (__u16) RESET_CMD;
|
|
|
+
|
|
|
+ rc = ERR_TIMOUT;
|
|
|
+ goto outahere_323B;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ /* Check if Flash was (accurately) written */
|
|
|
+ if (*(__u16 *) (dest) != data)
|
|
|
+ rc = ERR_PROG_ERROR;
|
|
|
+
|
|
|
+outahere_323B:
|
|
|
+ if (flag)
|
|
|
+ enable_interrupts ();
|
|
|
+ return rc;
|
|
|
+}
|
|
|
+
|
|
|
+/*-----------------------------------------------------------------------
|
|
|
+ * Copy memory to flash.
|
|
|
+ */
|
|
|
+int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
|
|
|
+{
|
|
|
+ ulong cp, wp;
|
|
|
+ ushort data;
|
|
|
+ int l;
|
|
|
+ int i, rc;
|
|
|
+
|
|
|
+ wp = (addr & ~1); /* 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 << 8);
|
|
|
+ }
|
|
|
+ for (; i < 2 && cnt > 0; ++i) {
|
|
|
+ data = (data >> 8) | (*src++ << 8);
|
|
|
+ --cnt;
|
|
|
+ ++cp;
|
|
|
+ }
|
|
|
+ for (; cnt == 0 && i < 2; ++i, ++cp) {
|
|
|
+ data = (data >> 8) | (*(uchar *) cp << 8);
|
|
|
+ }
|
|
|
+
|
|
|
+ if ((rc = write_word (info, wp, data)) != 0) {
|
|
|
+ return (rc);
|
|
|
+ }
|
|
|
+ wp += 2;
|
|
|
+ }
|
|
|
+
|
|
|
+ /*
|
|
|
+ * handle word aligned part
|
|
|
+ */
|
|
|
+ while (cnt >= 2) {
|
|
|
+ data = *((ushort *) src);
|
|
|
+ if ((rc = write_word (info, wp, data)) != 0)
|
|
|
+ return (rc);
|
|
|
+ src += 2;
|
|
|
+ wp += 2;
|
|
|
+ cnt -= 2;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (cnt == 0)
|
|
|
+ return ERR_OK;
|
|
|
+
|
|
|
+ /*
|
|
|
+ * handle unaligned tail bytes
|
|
|
+ */
|
|
|
+ data = 0;
|
|
|
+ for (i = 0, cp = wp; i < 2 && cnt > 0; ++i, ++cp) {
|
|
|
+ data = (data >> 8) | (*src++ << 8);
|
|
|
+ --cnt;
|
|
|
+ }
|
|
|
+ for (; i < 2; ++i, ++cp) {
|
|
|
+ data = (data >> 8) | (*(uchar *) cp << 8);
|
|
|
+ }
|
|
|
+
|
|
|
+ return write_word (info, wp, data);
|
|
|
+}
|