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-rw-r--r--board/sbc2410x/flash.c431
1 files changed, 431 insertions, 0 deletions
diff --git a/board/sbc2410x/flash.c b/board/sbc2410x/flash.c
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+++ b/board/sbc2410x/flash.c
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+/*
+ * (C) Copyright 2002
+ * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
+ * Alex Zuepke <azu@sysgo.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
+ */
+
+#include <common.h>
+
+ulong myflush (void);
+
+#define FLASH_BANK_SIZE PHYS_FLASH_SIZE
+#define MAIN_SECT_SIZE 0x10000 /* 64 KB */
+
+flash_info_t flash_info[CFG_MAX_FLASH_BANKS];
+
+#define CMD_READ_ARRAY 0x000000F0
+#define CMD_UNLOCK1 0x000000AA
+#define CMD_UNLOCK2 0x00000055
+#define CMD_ERASE_SETUP 0x00000080
+#define CMD_ERASE_CONFIRM 0x00000030
+#define CMD_PROGRAM 0x000000A0
+#define CMD_UNLOCK_BYPASS 0x00000020
+
+#define MEM_FLASH_ADDR1 (*(volatile u16 *)(CFG_FLASH_BASE + (0x00000555 << 1)))
+#define MEM_FLASH_ADDR2 (*(volatile u16 *)(CFG_FLASH_BASE + (0x000002AA << 1)))
+
+#define BIT_ERASE_DONE 0x00000080
+#define BIT_RDY_MASK 0x00000080
+#define BIT_PROGRAM_ERROR 0x00000020
+#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 =
+#if defined(CONFIG_AMD_LV400)
+ (AMD_MANUFACT & FLASH_VENDMASK) |
+ (AMD_ID_LV400B & FLASH_TYPEMASK);
+#elif defined(CONFIG_AMD_LV800)
+ (AMD_MANUFACT & FLASH_VENDMASK) |
+ (AMD_ID_LV800B & FLASH_TYPEMASK);
+#else
+#error "Unknown flash configured"
+#endif
+ 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++) {
+ if (j <= 3) {
+ /* 1st one is 16 KB */
+ if (j == 0) {
+ flash_info[i].start[j] =
+ flashbase + 0;
+ }
+
+ /* 2nd and 3rd are both 8 KB */
+ if ((j == 1) || (j == 2)) {
+ flash_info[i].start[j] =
+ flashbase + 0x4000 + (j -
+ 1) *
+ 0x2000;
+ }
+
+ /* 4th 32 KB */
+ if (j == 3) {
+ flash_info[i].start[j] =
+ flashbase + 0x8000;
+ }
+ } else {
+ flash_info[i].start[j] =
+ flashbase + (j - 3) * MAIN_SECT_SIZE;
+ }
+ }
+ size += flash_info[i].size;
+ }
+
+ flash_protect (FLAG_PROTECT_SET,
+ CFG_FLASH_BASE,
+ CFG_FLASH_BASE + monitor_flash_len - 1,
+ &flash_info[0]);
+
+ flash_protect (FLAG_PROTECT_SET,
+ CFG_ENV_ADDR,
+ CFG_ENV_ADDR + CFG_ENV_SIZE - 1, &flash_info[0]);
+
+ 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_LV400B & FLASH_TYPEMASK):
+ printf ("1x Amd29LV400BB (4Mbit)\n");
+ break;
+ case (AMD_ID_LV800B & FLASH_TYPEMASK):
+ printf ("1x Amd29LV800BB (8Mbit)\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)
+{
+ ushort result;
+ int iflag, cflag, prot, sect;
+ int rc = ERR_OK;
+ int chip;
+
+ /* 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)
+ return ERR_PROTECTED;
+
+ /*
+ * 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.
+ */
+ cflag = icache_status ();
+ icache_disable ();
+ iflag = disable_interrupts ();
+
+ /* Start erase on unprotected sectors */
+ for (sect = s_first; sect <= s_last && !ctrlc (); sect++) {
+ printf ("Erasing sector %2d ... ", sect);
+
+ /* arm simple, non interrupt dependent timer */
+ reset_timer_masked ();
+
+ if (info->protect[sect] == 0) { /* not protected */
+ vu_short *addr = (vu_short *) (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 */
+ chip = 0;
+
+ do {
+ result = *addr;
+
+ /* check timeout */
+ if (get_timer_masked () >
+ CFG_FLASH_ERASE_TOUT) {
+ MEM_FLASH_ADDR1 = CMD_READ_ARRAY;
+ chip = TMO;
+ break;
+ }
+
+ if (!chip
+ && (result & 0xFFFF) & BIT_ERASE_DONE)
+ chip = READY;
+
+ if (!chip
+ && (result & 0xFFFF) & BIT_PROGRAM_ERROR)
+ chip = ERR;
+
+ } while (!chip);
+
+ MEM_FLASH_ADDR1 = CMD_READ_ARRAY;
+
+ if (chip == ERR) {
+ rc = ERR_PROG_ERROR;
+ goto outahere;
+ }
+ if (chip == TMO) {
+ rc = ERR_TIMOUT;
+ goto outahere;
+ }
+
+ printf ("ok.\n");
+ } else { /* it was protected */
+
+ printf ("protected!\n");
+ }
+ }
+
+ if (ctrlc ())
+ printf ("User Interrupt!\n");
+
+ outahere:
+ /* allow flash to settle - wait 10 ms */
+ udelay_masked (10000);
+
+ if (iflag)
+ enable_interrupts ();
+
+ if (cflag)
+ icache_enable ();
+
+ return rc;
+}
+
+/*-----------------------------------------------------------------------
+ * Copy memory to flash
+ */
+
+volatile static int write_hword (flash_info_t * info, ulong dest, ushort data)
+{
+ vu_short *addr = (vu_short *) dest;
+ ushort result;
+ int rc = ERR_OK;
+ int cflag, iflag;
+ int chip;
+
+ /*
+ * 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.
+ */
+ cflag = icache_status ();
+ icache_disable ();
+ 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 */
+ chip = 0;
+ do {
+ result = *addr;
+
+ /* check timeout */
+ if (get_timer_masked () > CFG_FLASH_ERASE_TOUT) {
+ chip = ERR | TMO;
+ break;
+ }
+ if (!chip && ((result & 0x80) == (data & 0x80)))
+ chip = READY;
+
+ if (!chip && ((result & 0xFFFF) & BIT_PROGRAM_ERROR)) {
+ result = *addr;
+
+ if ((result & 0x80) == (data & 0x80))
+ chip = READY;
+ else
+ chip = ERR;
+ }
+
+ } while (!chip);
+
+ *addr = CMD_READ_ARRAY;
+
+ if (chip == ERR || *addr != data)
+ rc = ERR_PROG_ERROR;
+
+ if (iflag)
+ enable_interrupts ();
+
+ if (cflag)
+ icache_enable ();
+
+ return rc;
+}
+
+/*-----------------------------------------------------------------------
+ * Copy memory to flash.
+ */
+
+int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
+{
+ ulong cp, wp;
+ int l;
+ int i, rc;
+ ushort data;
+
+ 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_hword (info, wp, data)) != 0) {
+ return (rc);
+ }
+ wp += 2;
+ }
+
+ /*
+ * handle word aligned part
+ */
+ while (cnt >= 2) {
+ data = *((vu_short *) src);
+ if ((rc = write_hword (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_hword (info, wp, data);
+}
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