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+/*
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+ * (C) Copyright 2004
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+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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+ *
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+ * (C) Copyright 2001
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+ * Kyle Harris, Nexus Technologies, Inc. kharris@nexus-tech.net
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+ *
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+ * (C) Copyright 2001
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+ * Wolfgang Denk, DENX Software Engineering, wd@denx.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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+#undef DEBUG
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+
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+#include <common.h>
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+#include <mpc8xx.h>
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+
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+#ifndef CFG_OR_TIMING_FLASH_AT_50MHZ
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+#define CFG_OR_TIMING_FLASH_AT_50MHZ (OR_ACS_DIV1 | OR_TRLX | OR_CSNT_SAM | \
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+ OR_SCY_2_CLK | OR_EHTR | OR_BI)
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+#endif
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+
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+flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */
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+
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+#if defined(CFG_ENV_IS_IN_FLASH)
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+# ifndef CFG_ENV_ADDR
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+# define CFG_ENV_ADDR (CFG_FLASH_BASE + CFG_ENV_OFFSET)
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+# endif
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+# ifndef CFG_ENV_SIZE
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+# define CFG_ENV_SIZE CFG_ENV_SECT_SIZE
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+# endif
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+# ifndef CFG_ENV_SECT_SIZE
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+# define CFG_ENV_SECT_SIZE CFG_ENV_SIZE
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+# endif
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+#endif
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+
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+/*-----------------------------------------------------------------------
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+ * Protection Flags:
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+ */
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+#define FLAG_PROTECT_SET 0x01
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+#define FLAG_PROTECT_CLEAR 0x02
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+
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+/* Board support for 1 or 2 flash devices */
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+#undef FLASH_PORT_WIDTH32
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+#undef FLASH_PORT_WIDTH16
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+#define FLASH_PORT_WIDTH8
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+
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+#ifdef FLASH_PORT_WIDTH16
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+#define FLASH_PORT_WIDTH ushort
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+#define FLASH_PORT_WIDTHV vu_short
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+#elif FLASH_PORT_WIDTH32
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+#define FLASH_PORT_WIDTH ulong
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+#define FLASH_PORT_WIDTHV vu_long
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+#else /* FLASH_PORT_WIDTH8 */
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+#define FLASH_PORT_WIDTH uchar
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+#define FLASH_PORT_WIDTHV vu_char
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+#endif
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+
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+#define FPW FLASH_PORT_WIDTH
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+#define FPWV FLASH_PORT_WIDTHV
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+
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+/*-----------------------------------------------------------------------
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+ * Functions
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+ */
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+static ulong flash_get_size (FPWV * addr, flash_info_t * info);
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+static int write_data (flash_info_t * info, ulong dest, FPW data);
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+static void flash_get_offsets (ulong base, flash_info_t * info);
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+
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+/*-----------------------------------------------------------------------
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+ */
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+
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+unsigned long flash_init (void)
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+{
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+ volatile immap_t *immap = (immap_t *) CFG_IMMR;
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+ volatile memctl8xx_t *memctl = &immap->im_memctl;
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+ unsigned long size_b0;
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+ int i;
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+#ifdef CFG_OR_TIMING_FLASH_AT_50MHZ
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+ int scy, trlx, flash_or_timing, clk_diff;
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+
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+ DECLARE_GLOBAL_DATA_PTR;
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+
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+ scy = (CFG_OR_TIMING_FLASH_AT_50MHZ & OR_SCY_MSK) >> 4;
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+ if (CFG_OR_TIMING_FLASH_AT_50MHZ & OR_TRLX) {
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+ trlx = OR_TRLX;
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+ scy *= 2;
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+ } else
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+ trlx = 0;
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+
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+ /* We assume that each 10MHz of bus clock require 1-clk SCY
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+ * adjustment.
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+ */
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+ clk_diff = (gd->bus_clk / 1000000) - 50;
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+
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+ /* We need proper rounding here. This is what the "+5" and "-5"
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+ * are here for.
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+ */
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+ if (clk_diff >= 0)
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+ scy += (clk_diff + 5) / 10;
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+ else
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+ scy += (clk_diff - 5) / 10;
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+
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+ /* For bus frequencies above 50MHz, we want to use relaxed
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+ * timing (OR_TRLX).
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+ */
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+ if (gd->bus_clk >= 50000000)
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+ trlx = OR_TRLX;
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+ else
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+ trlx = 0;
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+
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+ if (trlx)
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+ scy /= 2;
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+
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+ if (scy > 0xf)
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+ scy = 0xf;
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+ if (scy < 1)
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+ scy = 1;
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+
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+ flash_or_timing = (scy << 4) | trlx |
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+ (CFG_OR_TIMING_FLASH_AT_50MHZ & ~(OR_TRLX | OR_SCY_MSK));
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+#endif
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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 - FIXME XXX */
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+ size_b0 = flash_get_size ((FPW *) FLASH_BASE0_PRELIM, &flash_info[0]);
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+
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+ if (flash_info[0].flash_id == FLASH_UNKNOWN) {
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+ printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
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+ size_b0, size_b0 << 20);
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+ }
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+
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+ /* Remap FLASH according to real size */
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+#ifndef CFG_OR_TIMING_FLASH_AT_50MHZ
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+ memctl->memc_or0 = CFG_OR_TIMING_FLASH | (-size_b0 & OR_AM_MSK);
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+#else
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+ memctl->memc_or0 = flash_or_timing | (-size_b0 & OR_AM_MSK);
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+#endif
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+ memctl->memc_br0 = (CFG_FLASH_BASE & BR_BA_MSK) | BR_PS_8 | BR_MS_GPCM | BR_V;
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+
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+ /* Re-do sizing to get full correct info */
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+ size_b0 = flash_get_size ((FPW *) CFG_FLASH_BASE, &flash_info[0]);
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+
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+ flash_get_offsets (CFG_FLASH_BASE, &flash_info[0]);
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+
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+#if CFG_MONITOR_BASE >= CFG_FLASH_BASE
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+ /* monitor protection ON by default */
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+ (void) flash_protect (FLAG_PROTECT_SET,
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+ CFG_MONITOR_BASE,
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+ CFG_MONITOR_BASE + monitor_flash_len - 1,
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+ &flash_info[0]);
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+#endif
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+
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+#ifdef CFG_ENV_IS_IN_FLASH
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+ /* ENV protection ON by default */
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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,
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+ &flash_info[0]);
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+#endif
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+
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+ flash_info[0].size = size_b0;
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+
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+ return (size_b0);
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+}
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+
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+/*-----------------------------------------------------------------------
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+ */
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+static void flash_get_offsets (ulong base, 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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+ return;
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+ }
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+
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+ if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) {
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+ for (i = 0; i < info->sector_count; i++) {
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+ info->start[i] = base + (i * 0x00020000);
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+ }
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+ }
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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_INTEL:
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+ printf ("INTEL ");
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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_28F320J3A:
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+ printf ("28F320J3A\n");
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+ break;
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+ case FLASH_28F640J3A:
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+ printf ("28F640J3A\n");
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+ break;
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+ case FLASH_28F128J3A:
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+ printf ("28F128J3A\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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+
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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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+ printf (" %08lX%s",
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+ 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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+ return;
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+}
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+
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+/*-----------------------------------------------------------------------
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+ */
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+
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+
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+/*-----------------------------------------------------------------------
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+ */
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+
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+/*
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+ * The following code cannot be run from FLASH!
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+ */
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+
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+static ulong flash_get_size (FPWV * addr, flash_info_t * info)
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+{
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+ FPW value;
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+
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+ addr[0] = (FPW) 0x00900090;
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+
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+ value = addr[0];
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+
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+ debug ("Manuf. ID @ 0x%08lx: 0x%08lx\n", (ulong)addr, value);
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+
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+ switch (value) {
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+ case (FPW) INTEL_MANUFACT:
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+ info->flash_id = FLASH_MAN_INTEL;
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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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+ addr[0] = (FPW) 0x00FF00FF; /* restore read mode */
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+ return (0); /* no or unknown flash */
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+ }
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+
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+#ifdef FLASH_PORT_WIDTH8
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+ value = addr[2]; /* device ID */
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+#else
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+ value = addr[1]; /* device ID */
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+#endif
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+
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+ debug ("Device ID @ 0x%08lx: 0x%08lx\n", (ulong)(&addr[1]), value);
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+
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+ switch (value) {
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+ case (FPW) INTEL_ID_28F320J3A:
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+ info->flash_id += FLASH_28F320J3A;
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+ info->sector_count = 32;
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+ info->size = 0x00400000;
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+ break; /* => 4 MB */
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+
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+ case (FPW) INTEL_ID_28F640J3A:
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+ info->flash_id += FLASH_28F640J3A;
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+ info->sector_count = 64;
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+ info->size = 0x00800000;
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+ break; /* => 8 MB */
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+
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+ case (FPW) INTEL_ID_28F128J3A:
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+ info->flash_id += FLASH_28F128J3A;
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+ info->sector_count = 128;
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+ info->size = 0x01000000;
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+ break; /* => 16 MB */
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+
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+ default:
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+ info->flash_id = FLASH_UNKNOWN;
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+ break;
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+ }
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+
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+ if (info->sector_count > CFG_MAX_FLASH_SECT) {
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+ printf ("** ERROR: sector count %d > max (%d) **\n",
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+ info->sector_count, CFG_MAX_FLASH_SECT);
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+ info->sector_count = CFG_MAX_FLASH_SECT;
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+ }
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+
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+ addr[0] = (FPW) 0x00FF00FF; /* restore read mode */
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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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+ */
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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, prot, sect;
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+ ulong type, start, now, last;
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+ int rcode = 0;
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+
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+ if ((s_first < 0) || (s_first > s_last)) {
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+ if (info->flash_id == FLASH_UNKNOWN) {
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+ printf ("- missing\n");
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+ } else {
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+ printf ("- no sectors to erase\n");
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+ }
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+ return 1;
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+ }
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+
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+ type = (info->flash_id & FLASH_VENDMASK);
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+ if ((type != FLASH_MAN_INTEL)) {
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+ printf ("Can't erase unknown flash type %08lx - aborted\n",
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+ info->flash_id);
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+ return 1;
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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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+
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+ if (prot) {
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+ printf ("- Warning: %d protected sectors will not be erased!\n",
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+ prot);
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+ } else {
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+ printf ("\n");
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+ }
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+
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+ start = get_timer (0);
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+ last = start;
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+ /* Start erase on unprotected sectors */
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+ for (sect = s_first; sect <= s_last; sect++) {
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+ if (info->protect[sect] == 0) { /* not protected */
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+ FPWV *addr = (FPWV *) (info->start[sect]);
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+ FPW status;
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+
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+ /* Disable interrupts which might cause a timeout here */
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+ flag = disable_interrupts ();
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+
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+ *addr = (FPW) 0x00500050; /* clear status register */
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+ *addr = (FPW) 0x00200020; /* erase setup */
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+ *addr = (FPW) 0x00D000D0; /* erase confirm */
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+
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+ /* re-enable interrupts if necessary */
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+ if (flag)
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+ enable_interrupts ();
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+
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+ /* wait at least 80us - let's wait 1 ms */
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+ udelay (1000);
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+
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+ while (((status = *addr) & (FPW) 0x00800080) != (FPW) 0x00800080) {
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+ if ((now = get_timer (start)) > CFG_FLASH_ERASE_TOUT) {
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+ printf ("Timeout\n");
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+ *addr = (FPW) 0x00B000B0; /* suspend erase */
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+ *addr = (FPW) 0x00FF00FF; /* reset to read mode */
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+ rcode = 1;
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+ break;
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+ }
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+
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+ /* show that we're waiting */
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+ if ((now - last) > 1000) { /* every second */
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+ putc ('.');
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+ last = now;
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+ }
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+ }
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+
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+ *addr = (FPW) 0x00FF00FF; /* reset to read mode */
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+ }
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+ }
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+ printf (" done\n");
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+ return rcode;
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+}
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|
+
|
|
|
+/*-----------------------------------------------------------------------
|
|
|
+ * Copy memory to flash, returns:
|
|
|
+ * 0 - OK
|
|
|
+ * 1 - write timeout
|
|
|
+ * 2 - Flash not erased
|
|
|
+ * 4 - Flash not identified
|
|
|
+ */
|
|
|
+
|
|
|
+int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
|
|
|
+{
|
|
|
+ ulong cp, wp;
|
|
|
+ FPW data;
|
|
|
+
|
|
|
+ int i, l, rc, port_width;
|
|
|
+
|
|
|
+ if (info->flash_id == FLASH_UNKNOWN) {
|
|
|
+ return 4;
|
|
|
+ }
|
|
|
+/* get lower word aligned address */
|
|
|
+#ifdef FLASH_PORT_WIDTH16
|
|
|
+ wp = (addr & ~1);
|
|
|
+ port_width = 2;
|
|
|
+#elif defined(FLASH_PORT_WIDTH32)
|
|
|
+ wp = (addr & ~3);
|
|
|
+ port_width = 4;
|
|
|
+#else
|
|
|
+ wp = addr;
|
|
|
+ port_width = 1;
|
|
|
+#endif
|
|
|
+
|
|
|
+ /*
|
|
|
+ * 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 < port_width && cnt > 0; ++i) {
|
|
|
+ data = (data << 8) | *src++;
|
|
|
+ --cnt;
|
|
|
+ ++cp;
|
|
|
+ }
|
|
|
+ for (; cnt == 0 && i < port_width; ++i, ++cp) {
|
|
|
+ data = (data << 8) | (*(uchar *) cp);
|
|
|
+ }
|
|
|
+
|
|
|
+ if ((rc = write_data (info, wp, data)) != 0) {
|
|
|
+ return (rc);
|
|
|
+ }
|
|
|
+ wp += port_width;
|
|
|
+ }
|
|
|
+
|
|
|
+ /*
|
|
|
+ * handle word aligned part
|
|
|
+ */
|
|
|
+ while (cnt >= port_width) {
|
|
|
+ data = 0;
|
|
|
+ for (i = 0; i < port_width; ++i) {
|
|
|
+ data = (data << 8) | *src++;
|
|
|
+ }
|
|
|
+ if ((rc = write_data (info, wp, data)) != 0) {
|
|
|
+ return (rc);
|
|
|
+ }
|
|
|
+ wp += port_width;
|
|
|
+ cnt -= port_width;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (cnt == 0) {
|
|
|
+ return (0);
|
|
|
+ }
|
|
|
+
|
|
|
+ /*
|
|
|
+ * handle unaligned tail bytes
|
|
|
+ */
|
|
|
+ data = 0;
|
|
|
+ for (i = 0, cp = wp; i < port_width && cnt > 0; ++i, ++cp) {
|
|
|
+ data = (data << 8) | *src++;
|
|
|
+ --cnt;
|
|
|
+ }
|
|
|
+ for (; i < port_width; ++i, ++cp) {
|
|
|
+ data = (data << 8) | (*(uchar *) cp);
|
|
|
+ }
|
|
|
+
|
|
|
+ return (write_data (info, wp, data));
|
|
|
+}
|
|
|
+
|
|
|
+/*-----------------------------------------------------------------------
|
|
|
+ * Write a word or halfword to Flash, returns:
|
|
|
+ * 0 - OK
|
|
|
+ * 1 - write timeout
|
|
|
+ * 2 - Flash not erased
|
|
|
+ */
|
|
|
+static int write_data (flash_info_t * info, ulong dest, FPW data)
|
|
|
+{
|
|
|
+ FPWV *addr = (FPWV *) dest;
|
|
|
+ ulong status;
|
|
|
+ ulong start;
|
|
|
+ int flag;
|
|
|
+
|
|
|
+ /* Check if Flash is (sufficiently) erased */
|
|
|
+ if ((*addr & data) != data) {
|
|
|
+ printf ("not erased at %08lx (%x)\n", (ulong) addr, *addr);
|
|
|
+ return (2);
|
|
|
+ }
|
|
|
+ /* Disable interrupts which might cause a timeout here */
|
|
|
+ flag = disable_interrupts ();
|
|
|
+
|
|
|
+ *addr = (FPW) 0x00400040; /* write setup */
|
|
|
+ *addr = data;
|
|
|
+
|
|
|
+ /* re-enable interrupts if necessary */
|
|
|
+ if (flag)
|
|
|
+ enable_interrupts ();
|
|
|
+
|
|
|
+ start = get_timer (0);
|
|
|
+
|
|
|
+ while (((status = *addr) & (FPW) 0x00800080) != (FPW) 0x00800080) {
|
|
|
+ if (get_timer (start) > CFG_FLASH_WRITE_TOUT) {
|
|
|
+ *addr = (FPW) 0x00FF00FF; /* restore read mode */
|
|
|
+ return (1);
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ *addr = (FPW) 0x00FF00FF; /* restore read mode */
|
|
|
+
|
|
|
+ return (0);
|
|
|
+}
|