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-rw-r--r--board/trab/flash.c455
1 files changed, 455 insertions, 0 deletions
diff --git a/board/trab/flash.c b/board/trab/flash.c
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--- /dev/null
+++ b/board/trab/flash.c
@@ -0,0 +1,455 @@
+/*
+ * (C) Copyright 2002
+ * Gary Jennejohn, DENX Software Engineering, <gj@denx.de>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+/* #define DEBUG */
+
+#include <common.h>
+#include <environment.h>
+
+ulong myflush (void);
+
+
+#define FLASH_BANK_SIZE 0x800000 /* 8 MB */
+/* this varies depending on the sector */
+#define MAIN_SECT_SIZE 0x20000 /* 2 x 64 kB */
+
+flash_info_t flash_info[CFG_MAX_FLASH_BANKS];
+
+
+#define CMD_READ_ARRAY 0x00F000F0
+#define CMD_UNLOCK1 0x00AA00AA
+#define CMD_UNLOCK2 0x00550055
+#define CMD_ERASE_SETUP 0x00800080
+#define CMD_ERASE_CONFIRM 0x00300030
+#define CMD_PROGRAM 0x00A000A0
+#define CMD_UNLOCK_BYPASS 0x00200020
+
+#define MEM_FLASH_ADDR1 (*(volatile u32 *)(CFG_FLASH_BASE + (0x00000555 << 2)))
+#define MEM_FLASH_ADDR2 (*(volatile u32 *)(CFG_FLASH_BASE + (0x000002AA << 2)))
+
+#define BIT_ERASE_DONE 0x00800080
+#define BIT_RDY_MASK 0x00800080
+#define BIT_PROGRAM_ERROR 0x00200020
+#define BIT_TIMEOUT 0x80000000 /* our flag */
+
+#define READY 1
+#define ERR 2
+#define TMO 4
+
+/*-----------------------------------------------------------------------
+ */
+
+ulong flash_init (void)
+{
+ int i, j;
+ ulong size = 0;
+
+ for (i = 0; i < CFG_MAX_FLASH_BANKS; i++) {
+ ulong flashbase = 0;
+
+ flash_info[i].flash_id =
+ (AMD_MANUFACT & FLASH_VENDMASK) |
+ (AMD_ID_LV320B & FLASH_TYPEMASK);
+ flash_info[i].size = FLASH_BANK_SIZE;
+ flash_info[i].sector_count = CFG_MAX_FLASH_SECT;
+ memset (flash_info[i].protect, 0, CFG_MAX_FLASH_SECT);
+ if (i == 0)
+ flashbase = PHYS_FLASH_1;
+ else
+ panic ("configured too many flash banks!\n");
+ for (j = 0; j < flash_info[i].sector_count; j++) {
+
+ flash_info[i].start[j] = flashbase;
+
+ /* the first 8 sectors are 8 kB */
+ flashbase += (j < 8) ? 0x4000 : MAIN_SECT_SIZE;
+ }
+ size += flash_info[i].size;
+ }
+
+ /*
+ * Protect monitor and environment sectors
+ */
+ flash_protect ( FLAG_PROTECT_SET,
+ CFG_FLASH_BASE,
+ CFG_FLASH_BASE + _armboot_end_data - _armboot_start,
+ &flash_info[0]);
+
+ flash_protect ( FLAG_PROTECT_SET,
+ CFG_ENV_ADDR,
+ CFG_ENV_ADDR + CFG_ENV_SIZE - 1, &flash_info[0]);
+
+#ifdef CFG_ENV_ADDR_REDUND
+ flash_protect ( FLAG_PROTECT_SET,
+ CFG_ENV_ADDR_REDUND,
+ CFG_ENV_ADDR_REDUND + CFG_ENV_SIZE_REDUND - 1,
+ &flash_info[0]);
+#endif
+
+ return size;
+}
+
+/*-----------------------------------------------------------------------
+ */
+void flash_print_info (flash_info_t * info)
+{
+ int i;
+
+ switch (info->flash_id & FLASH_VENDMASK) {
+ case (AMD_MANUFACT & FLASH_VENDMASK):
+ printf ("AMD: ");
+ break;
+ default:
+ printf ("Unknown Vendor ");
+ break;
+ }
+
+ switch (info->flash_id & FLASH_TYPEMASK) {
+ case (AMD_ID_LV320B & FLASH_TYPEMASK):
+ printf ("2x Am29LV320DB (32Mbit)\n");
+ break;
+ default:
+ printf ("Unknown Chip Type\n");
+ goto Done;
+ break;
+ }
+
+ printf (" Size: %ld MB in %d Sectors\n",
+ info->size >> 20, info->sector_count);
+
+ printf (" Sector Start Addresses:");
+ for (i = 0; i < info->sector_count; i++) {
+ if ((i % 5) == 0) {
+ printf ("\n ");
+ }
+ printf (" %08lX%s",
+ info->start[i],
+ info->protect[i] ? " (RO)" : " ");
+ }
+ printf ("\n");
+
+ Done:
+}
+
+/*-----------------------------------------------------------------------
+ */
+
+int flash_erase (flash_info_t * info, int s_first, int s_last)
+{
+ ulong result;
+
+#if 0
+ int cflag;
+#endif
+ int iflag, prot, sect;
+ int rc = ERR_OK;
+ int chip1, chip2;
+
+ debug ("flash_erase: s_first %d s_last %d\n", s_first, s_last);
+
+ /* first look for protection bits */
+
+ if (info->flash_id == FLASH_UNKNOWN)
+ return ERR_UNKNOWN_FLASH_TYPE;
+
+ if ((s_first < 0) || (s_first > s_last)) {
+ return ERR_INVAL;
+ }
+
+ if ((info->flash_id & FLASH_VENDMASK) !=
+ (AMD_MANUFACT & FLASH_VENDMASK)) {
+ return ERR_UNKNOWN_FLASH_VENDOR;
+ }
+
+ prot = 0;
+ for (sect = s_first; sect <= s_last; ++sect) {
+ if (info->protect[sect]) {
+ prot++;
+ }
+ }
+
+ if (prot) {
+ printf ("- Warning: %d protected sectors will not be erased!\n",
+ prot);
+ } else {
+ printf ("\n");
+ }
+
+ /*
+ * 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.
+ */
+#if 0
+ cflag = icache_status ();
+ icache_disable ();
+#endif
+ iflag = disable_interrupts ();
+
+ /* Start erase on unprotected sectors */
+ for (sect = s_first; sect <= s_last && !ctrlc (); sect++) {
+
+ debug ("Erasing sector %2d @ %08lX... ",
+ sect, info->start[sect]);
+
+ /* arm simple, non interrupt dependent timer */
+ reset_timer_masked ();
+
+ if (info->protect[sect] == 0) { /* not protected */
+ vu_long *addr = (vu_long *) (info->start[sect]);
+
+ MEM_FLASH_ADDR1 = CMD_UNLOCK1;
+ MEM_FLASH_ADDR2 = CMD_UNLOCK2;
+ MEM_FLASH_ADDR1 = CMD_ERASE_SETUP;
+
+ MEM_FLASH_ADDR1 = CMD_UNLOCK1;
+ MEM_FLASH_ADDR2 = CMD_UNLOCK2;
+ *addr = CMD_ERASE_CONFIRM;
+
+ /* wait until flash is ready */
+ chip1 = chip2 = 0;
+
+ do {
+ result = *addr;
+
+ /* check timeout */
+ if (get_timer_masked () > CFG_FLASH_ERASE_TOUT) {
+ MEM_FLASH_ADDR1 = CMD_READ_ARRAY;
+ chip1 = TMO;
+ break;
+ }
+
+ if (!chip1 && (result & 0xFFFF) & BIT_ERASE_DONE)
+ chip1 = READY;
+
+ if (!chip1 && (result & 0xFFFF) & BIT_PROGRAM_ERROR)
+ chip1 = ERR;
+
+ if (!chip2 && (result >> 16) & BIT_ERASE_DONE)
+ chip2 = READY;
+
+ if (!chip2 && (result >> 16) & BIT_PROGRAM_ERROR)
+ chip2 = ERR;
+
+ } while (!chip1 || !chip2);
+
+ MEM_FLASH_ADDR1 = CMD_READ_ARRAY;
+
+ if (chip1 == ERR || chip2 == ERR) {
+ rc = ERR_PROG_ERROR;
+ goto outahere;
+ }
+ if (chip1 == TMO) {
+ rc = ERR_TIMOUT;
+ goto outahere;
+ }
+
+#if 0
+ printf ("ok.\n");
+ } else { /* it was protected */
+
+ printf ("protected!\n");
+#endif
+ }
+ }
+
+outahere:
+ /* allow flash to settle - wait 10 ms */
+ udelay_masked (10000);
+
+ if (iflag)
+ enable_interrupts ();
+
+#if 0
+ if (cflag)
+ icache_enable ();
+#endif
+ return rc;
+}
+
+/*-----------------------------------------------------------------------
+ * Copy memory to flash
+ */
+
+volatile static int write_word (flash_info_t * info, ulong dest,
+ ulong data)
+{
+ vu_long *addr = (vu_long *) dest;
+ ulong result;
+ int rc = ERR_OK;
+
+#if 0
+ int cflag;
+#endif
+ int iflag;
+ int chip1, chip2;
+
+ /*
+ * Check if Flash is (sufficiently) erased
+ */
+ result = *addr;
+ if ((result & 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.
+ */
+#if 0
+ cflag = icache_status ();
+ icache_disable ();
+#endif
+ iflag = disable_interrupts ();
+
+ MEM_FLASH_ADDR1 = CMD_UNLOCK1;
+ MEM_FLASH_ADDR2 = CMD_UNLOCK2;
+ MEM_FLASH_ADDR1 = CMD_UNLOCK_BYPASS;
+ *addr = CMD_PROGRAM;
+ *addr = data;
+
+ /* arm simple, non interrupt dependent timer */
+ reset_timer_masked ();
+
+ /* wait until flash is ready */
+ chip1 = chip2 = 0;
+ do {
+ result = *addr;
+
+ /* check timeout */
+ if (get_timer_masked () > CFG_FLASH_ERASE_TOUT) {
+ chip1 = ERR | TMO;
+ break;
+ }
+ if (!chip1 && ((result & 0x80) == (data & 0x80)))
+ chip1 = READY;
+
+ if (!chip1 && ((result & 0xFFFF) & BIT_PROGRAM_ERROR)) {
+ result = *addr;
+
+ if ((result & 0x80) == (data & 0x80))
+ chip1 = READY;
+ else
+ chip1 = ERR;
+ }
+
+ if (!chip2 && ((result & (0x80 << 16)) == (data & (0x80 << 16))))
+ chip2 = READY;
+
+ if (!chip2 && ((result >> 16) & BIT_PROGRAM_ERROR)) {
+ result = *addr;
+
+ if ((result & (0x80 << 16)) == (data & (0x80 << 16)))
+ chip2 = READY;
+ else
+ chip2 = ERR;
+ }
+
+ } while (!chip1 || !chip2);
+
+ *addr = CMD_READ_ARRAY;
+
+ if (chip1 == ERR || chip2 == ERR || *addr != data)
+ rc = ERR_PROG_ERROR;
+
+ if (iflag)
+ enable_interrupts ();
+
+#if 0
+ if (cflag)
+ icache_enable ();
+#endif
+
+ return rc;
+}
+
+/*-----------------------------------------------------------------------
+ * Copy memory to flash.
+ */
+
+int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
+{
+ ulong cp, wp, data;
+ int l;
+ int i, rc;
+
+ wp = (addr & ~3); /* get lower word aligned address */
+
+ /*
+ * handle unaligned start bytes
+ */
+ if ((l = addr - wp) != 0) {
+ data = 0;
+ for (i = 0, cp = wp; i < l; ++i, ++cp) {
+ data = (data >> 8) | (*(uchar *) cp << 24);
+ }
+ for (; i < 4 && cnt > 0; ++i) {
+ data = (data >> 8) | (*src++ << 24);
+ --cnt;
+ ++cp;
+ }
+ for (; cnt == 0 && i < 4; ++i, ++cp) {
+ data = (data >> 8) | (*(uchar *) cp << 24);
+ }
+
+ if ((rc = write_word (info, wp, data)) != 0) {
+ return (rc);
+ }
+ wp += 4;
+ }
+
+ /*
+ * handle word aligned part
+ */
+ while (cnt >= 4) {
+ data = *((vu_long *) src);
+ if ((rc = write_word (info, wp, data)) != 0) {
+ return (rc);
+ }
+ src += 4;
+ wp += 4;
+ cnt -= 4;
+ }
+
+ if (cnt == 0) {
+ return ERR_OK;
+ }
+
+ /*
+ * handle unaligned tail bytes
+ */
+ data = 0;
+ for (i = 0, cp = wp; i < 4 && cnt > 0; ++i, ++cp) {
+ data = (data >> 8) | (*src++ << 24);
+ --cnt;
+ }
+ for (; i < 4; ++i, ++cp) {
+ data = (data >> 8) | (*(uchar *) cp << 24);
+ }
+
+ return write_word (info, wp, data);
+}
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