* Patch by Scott McNutt, 04 Oct 2003:
- add support for Altera Nios-32 CPU
- add support for Nios Cyclone Development Kit (DK-1C20)
* Patch by Steven Scholz, 29 Sep 2003:
- A second parameter for bootm overwrites the load address for
"Standalone Application" images.
- bootm sets environment variable "filesize" to the resulting
(uncompressed) data length for "Standalone Application" images
when autostart is set to "no". Now you can do something like
if bootm $fpgadata $some_free_ram ; then
fpga load 0 $some_free_ram $filesize
fi
* Patch by Denis Peter, 25 Sept 2003:
add support for the MIP405 Rev. C board
diff --git a/board/dk1c20/flash.c b/board/dk1c20/flash.c
new file mode 100644
index 0000000..c64f7dc
--- /dev/null
+++ b/board/dk1c20/flash.c
@@ -0,0 +1,226 @@
+/*
+ * (C) Copyright 2000
+ * Wolfgang Denk, DENX Software Engineering, wd@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
+ */
+
+
+#include <common.h>
+#include <nios.h>
+
+/*---------------------------------------------------------------------*/
+#define BANKSZ (8 * 1024 * 1024)
+#define SECTSZ (64 * 1024)
+#define USERFLASH (2 * 1024 * 1024) /* bottom 2 MB for user */
+
+flash_info_t flash_info[CFG_MAX_FLASH_BANKS];
+
+#define FLASH_WORD_SIZE unsigned char
+
+/*---------------------------------------------------------------------*/
+
+unsigned long flash_init (void)
+{
+ int i;
+ unsigned long addr;
+ flash_info_t *fli = &flash_info[0];
+
+ fli->size = BANKSZ;
+ fli->sector_count = CFG_MAX_FLASH_SECT;
+ fli->flash_id = FLASH_MAN_AMD;
+
+ addr = CFG_FLASH_BASE;
+ for (i = 0; i < fli->sector_count; ++i) {
+ fli->start[i] = addr;
+ addr += SECTSZ;
+
+ /* Protect all but 2 MByte user area */
+ if (addr < (CFG_FLASH_BASE + USERFLASH))
+ fli->protect[i] = 0;
+ else
+ fli->protect[i] = 1;
+ }
+
+ return (BANKSZ);
+}
+
+/*--------------------------------------------------------------------*/
+void flash_print_info (flash_info_t * info)
+{
+ int i, k;
+ unsigned long size;
+ int erased;
+ volatile unsigned char *flash;
+
+ printf (" Size: %ld KB in %d Sectors\n",
+ info->size >> 10, info->sector_count);
+ printf (" Sector Start Addresses:");
+ for (i = 0; i < info->sector_count; ++i) {
+
+ /* Check if whole sector is erased */
+ if (i != (info->sector_count - 1))
+ size = info->start[i + 1] - info->start[i];
+ else
+ size = info->start[0] + info->size - info->start[i];
+ erased = 1;
+ flash = (volatile unsigned char *) info->start[i];
+ for (k = 0; k < size; k++) {
+ if (*flash++ != 0xff) {
+ erased = 0;
+ break;
+ }
+ }
+
+ /* Print the info */
+ if ((i % 5) == 0)
+ printf ("\n ");
+ printf (" %08lX%s%s", info->start[i], erased ? " E" : " ",
+ info->protect[i] ? "RO " : " ");
+ }
+ printf ("\n");
+}
+
+/*-------------------------------------------------------------------*/
+
+
+int flash_erase (flash_info_t * info, int s_first, int s_last)
+{
+ volatile FLASH_WORD_SIZE *addr = (FLASH_WORD_SIZE *) (info->start[0]);
+ volatile FLASH_WORD_SIZE *addr2;
+ int prot, sect;
+ int any = 0;
+ unsigned oldpri;
+ ulong start;
+
+ /* Some sanity checking */
+ if ((s_first < 0) || (s_first > s_last)) {
+ printf ("- no sectors to erase\n");
+ return 1;
+ }
+
+ 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");
+ }
+
+ /* NOTE: disabling interrupts on Nios can be very bad since it
+ * also disables the LO_LIMIT exception. It's better here to
+ * set the interrupt priority to 3 & restore it when we're done.
+ */
+ oldpri = ipri (3);
+
+ /* It's ok to erase multiple sectors provided we don't delay more
+ * than 50 usec between cmds ... at which point the erase time-out
+ * occurs. So don't go and put printf() calls in the loop ... it
+ * won't be very helpful ;-)
+ */
+ for (sect = s_first; sect <= s_last; sect++) {
+ if (info->protect[sect] == 0) { /* not protected */
+ addr2 = (FLASH_WORD_SIZE *) (info->start[sect]);
+ *addr = 0xaa;
+ *addr = 0x55;
+ *addr = 0x80;
+ *addr = 0xaa;
+ *addr = 0x55;
+ *addr2 = 0x30;
+ any = 1;
+ }
+ }
+
+ /* Now just wait for 0xff & provide some user feedback while
+ * we wait.
+ */
+ if (any) {
+ addr2 = (FLASH_WORD_SIZE *) (info->start[sect]);
+ start = get_timer (0);
+ while (*addr2 != 0xff) {
+ udelay (1000 * 1000);
+ putc ('.');
+ if (get_timer (start) > CFG_FLASH_ERASE_TOUT) {
+ printf ("timeout\n");
+ return 1;
+ }
+ }
+ printf ("\n");
+ }
+
+ /* Restore interrupt priority */
+ ipri (oldpri);
+
+ return 0;
+}
+
+/*-----------------------------------------------------------------------
+ * Copy memory to flash, returns:
+ * 0 - OK
+ * 1 - write timeout
+ * 2 - Flash not erased
+ */
+
+int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
+{
+
+ vu_char *cmd = (vu_char *) info->start[0];
+ vu_char *dst = (vu_char *) addr;
+ unsigned char b;
+ unsigned oldpri;
+ ulong start;
+
+ while (cnt) {
+ /* Check for sufficient erase */
+ b = *src;
+ if ((*dst & b) != b) {
+ printf ("%02x : %02x\n", *dst, b);
+ return (2);
+ }
+
+ /* Disable interrupts other than window underflow
+ * (interrupt priority 2)
+ */
+ oldpri = ipri (3);
+ *cmd = 0xaa;
+ *cmd = 0x55;
+ *cmd = 0xa0;
+ *dst = b;
+
+ /* Verify write */
+ start = get_timer (0);
+ while (*dst != b) {
+ if (get_timer (start) > CFG_FLASH_WRITE_TOUT) {
+ ipri (oldpri);
+ return 1;
+ }
+ }
+ dst++;
+ src++;
+ cnt--;
+ ipri (oldpri);
+ }
+
+ return (0);
+}