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-rw-r--r--board/armadillo/flash.c338
1 files changed, 338 insertions, 0 deletions
diff --git a/board/armadillo/flash.c b/board/armadillo/flash.c
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+/*
+ * (C) Copyright 2002
+ * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
+ * Marius Groeger <mgroeger@sysgo.de>
+ *
+ * (C) Copyright 2005 Rowel Atienza <rowel@diwalabs.com>
+ * Flash driver for armadillo board HT1070
+ *
+ * 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>
+
+#define FLASH_BANK_SIZE 0x400000
+
+/*value used by hermit is 0x200*/
+/*document says sector size is either 64k in low mem reg and 8k in high mem reg*/
+#define MAIN_SECT_SIZE 0x10000
+
+#define UNALIGNED_MASK (3)
+#define FL_WORD(addr) (*(volatile unsigned short*)(addr))
+#define FLASH_TIMEOUT 20000000
+
+flash_info_t flash_info[CFG_MAX_FLASH_BANKS];
+
+/*-----------------------------------------------------------------------
+ */
+
+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 = (FUJ_MANUFACT & FLASH_VENDMASK);
+ /*(INTEL_ID_28F128J3 & 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 + j * MAIN_SECT_SIZE;
+ }
+ size += flash_info[i].size;
+ }
+
+ /* Protect monitor and environment sectors
+ */
+ 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 (FUJ_MANUFACT & FLASH_VENDMASK):
+ printf ("Fujitsu: ");
+ break;
+ default:
+ printf ("Unknown Vendor ");
+ break;
+ }
+/*
+ switch (info->flash_id & FLASH_TYPEMASK) {
+ case (INTEL_ID_28F128J3 & FLASH_TYPEMASK):
+ printf ("28F128J3 (128Mbit)\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: ;
+*/
+}
+
+/*
+ * * Loop until both write state machines complete.
+ * */
+static unsigned short flash_status_wait (unsigned long addr,
+ unsigned short value)
+{
+ unsigned short status;
+ long timeout = FLASH_TIMEOUT;
+
+ while (((status = (FL_WORD (addr))) != value) && timeout > 0) {
+ timeout--;
+ }
+ return status;
+}
+
+/*
+ * Loop until the Write State machine is ready, then do a full error
+ * check. Clear status and leave the flash in Read Array mode; return
+ * 0 for no error, -1 for error.
+ */
+static int flash_status_full_check (unsigned long addr, unsigned short value1,
+ unsigned short value2)
+{
+ unsigned short status1, status2;
+
+ status1 = flash_status_wait (addr, value1);
+ status2 = flash_status_wait (addr + 2, value2);
+ return (status1 != value1 || status2 != value2) ? -1 : 0;
+}
+
+/*-----------------------------------------------------------------------
+ */
+
+int flash_erase (flash_info_t * info, int s_first, int s_last)
+{
+ int flag, prot, sect;
+ int rc = ERR_OK;
+ unsigned long base;
+ unsigned long addr;
+
+ if ((info->flash_id & FLASH_VENDMASK) !=
+ (FUJ_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.
+ */
+ flag = disable_interrupts ();
+
+ printf ("Erasing %d sectors starting at sector %2d.\n"
+ "This make take some time ... ",
+ s_last - s_first, sect);
+ /* Start erase on unprotected sectors */
+ for (sect = s_first; sect <= s_last && !ctrlc (); sect++) {
+ /* ARM simple, non interrupt dependent timer */
+ reset_timer_masked ();
+
+ if (info->protect[sect] == 0) { /* not protected */
+
+ addr = sect * MAIN_SECT_SIZE;
+ addr &= ~(unsigned long) UNALIGNED_MASK; /* word align */
+ base = addr & 0xF0000000;
+
+ FL_WORD (base + (0x555 << 1)) = 0xAA;
+ FL_WORD (base + (0x2AA << 1)) = 0x55;
+ FL_WORD (base + (0x555 << 1)) = 0x80;
+ FL_WORD (base + (0x555 << 1)) = 0xAA;
+ FL_WORD (base + (0x2AA << 1)) = 0x55;
+ FL_WORD (addr) = 0x30;
+ if (flash_status_full_check (addr, 0xFFFF, 0xFFFF))
+ return ERR_PROTECTED;
+ }
+ }
+ printf ("\nDone.\n");
+ if (ctrlc ())
+ printf ("User Interrupt!\n");
+
+ /* allow flash to settle - wait 10 ms */
+ udelay_masked (10000);
+
+ if (flag)
+ enable_interrupts ();
+
+ return rc;
+}
+
+
+/*-----------------------------------------------------------------------
+ * Copy memory to flash
+ */
+
+static int write_word (flash_info_t * info, ulong dest, ushort data)
+{
+ int flag;
+ unsigned long base;
+
+ /* Check if Flash is (sufficiently) erased
+ */
+ if ((FL_WORD (dest) & data) != data)
+ return ERR_NOT_ERASED;
+
+ /*if(dest & UNALIGNED_MASK) return ERR_ALIGN; */
+
+ /*
+ * 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 ();
+
+ /* arm simple, non interrupt dependent timer */
+ reset_timer_masked ();
+
+ base = dest & 0xF0000000;
+ FL_WORD (base + (0x555 << 1)) = 0xAA;
+ FL_WORD (base + (0x2AA << 1)) = 0x55;
+ FL_WORD (base + (0x555 << 1)) = 0xA0;
+ FL_WORD (dest) = data;
+ /*printf("writing 0x%p = 0x%x\n",dest,data); */
+ if (flash_status_wait (dest, data) != data)
+ return ERR_PROG_ERROR;
+
+ if (flag)
+ enable_interrupts ();
+
+ return ERR_OK;
+}
+
+/*-----------------------------------------------------------------------
+ * 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 */
+ printf ("Writing %d short data to 0x%p from 0x%p.\n ", cnt, wp, src);
+
+ /*
+ * 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 = *((vu_short *) src);
+ if ((rc = write_word (info, wp, data)) != 0) {
+ return (rc);
+ }
+ src += 2;
+ wp += 2;
+ cnt -= 2;
+ }
+
+ if (cnt == 0) {
+ printf ("\nDone.\n");
+ 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);
+}
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