summaryrefslogtreecommitdiff
path: root/board/netta2/flash.c
diff options
context:
space:
mode:
Diffstat (limited to 'board/netta2/flash.c')
-rw-r--r--board/netta2/flash.c506
1 files changed, 506 insertions, 0 deletions
diff --git a/board/netta2/flash.c b/board/netta2/flash.c
new file mode 100644
index 0000000..a1c87f5
--- /dev/null
+++ b/board/netta2/flash.c
@@ -0,0 +1,506 @@
+/*
+ * (C) Copyright 2000-2004
+ * 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 <mpc8xx.h>
+
+flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */
+
+/*-----------------------------------------------------------------------
+ * Functions
+ */
+static ulong flash_get_size(vu_long * addr, flash_info_t * info);
+static int write_byte(flash_info_t * info, ulong dest, uchar data);
+static void flash_get_offsets(ulong base, flash_info_t * info);
+
+/*-----------------------------------------------------------------------
+ */
+
+unsigned long flash_init(void)
+{
+ volatile immap_t *immap = (immap_t *) CFG_IMMR;
+ volatile memctl8xx_t *memctl = &immap->im_memctl;
+ unsigned long size;
+ int i;
+
+ /* Init: no FLASHes known */
+ for (i = 0; i < CFG_MAX_FLASH_BANKS; ++i)
+ flash_info[i].flash_id = FLASH_UNKNOWN;
+
+ size = flash_get_size((vu_long *) FLASH_BASE0_PRELIM, &flash_info[0]);
+
+ if (flash_info[0].flash_id == FLASH_UNKNOWN) {
+ printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
+ size, size << 20);
+ }
+
+ /* Remap FLASH according to real size */
+ memctl->memc_or0 = CFG_OR_TIMING_FLASH | (-size & 0xFFFF8000);
+ memctl->memc_br0 = (CFG_FLASH_BASE & BR_BA_MSK) | (memctl->memc_br0 & ~(BR_BA_MSK));
+
+ /* Re-do sizing to get full correct info */
+ size = flash_get_size((vu_long *) CFG_FLASH_BASE, &flash_info[0]);
+
+ flash_get_offsets(CFG_FLASH_BASE, &flash_info[0]);
+
+ /* monitor protection ON by default */
+ 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]);
+
+#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
+
+ flash_info[0].size = size;
+
+ return (size);
+}
+
+/*-----------------------------------------------------------------------
+ */
+static void flash_get_offsets(ulong base, flash_info_t * info)
+{
+ int i;
+
+ /* set up sector start address table */
+ if ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM040) {
+ for (i = 0; i < info->sector_count; i++) {
+ info->start[i] = base + (i * 0x00010000);
+ }
+ } else if (info->flash_id & FLASH_BTYPE) {
+ /* set sector offsets for bottom boot block type */
+ info->start[0] = base + 0x00000000;
+ info->start[1] = base + 0x00004000;
+ info->start[2] = base + 0x00006000;
+ info->start[3] = base + 0x00008000;
+ for (i = 4; i < info->sector_count; i++) {
+ info->start[i] = base + (i * 0x00010000) - 0x00030000;
+ }
+ } else {
+ /* set sector offsets for top boot block type */
+ i = info->sector_count - 1;
+ info->start[i--] = base + info->size - 0x00004000;
+ info->start[i--] = base + info->size - 0x00006000;
+ info->start[i--] = base + info->size - 0x00008000;
+ for (; i >= 0; i--) {
+ info->start[i] = base + i * 0x00010000;
+ }
+ }
+}
+
+/*-----------------------------------------------------------------------
+ */
+void flash_print_info(flash_info_t * info)
+{
+ int i;
+
+ if (info->flash_id == FLASH_UNKNOWN) {
+ printf("missing or unknown FLASH type\n");
+ return;
+ }
+
+ switch (info->flash_id & FLASH_VENDMASK) {
+ case FLASH_MAN_AMD:
+ printf("AMD ");
+ break;
+ case FLASH_MAN_FUJ:
+ printf("FUJITSU ");
+ break;
+ case FLASH_MAN_MX:
+ printf("MXIC ");
+ break;
+ default:
+ printf("Unknown Vendor ");
+ break;
+ }
+
+ switch (info->flash_id & FLASH_TYPEMASK) {
+ case FLASH_AM040:
+ printf("AM29LV040B (4 Mbit, bottom boot sect)\n");
+ break;
+ case FLASH_AM400B:
+ printf("AM29LV400B (4 Mbit, bottom boot sect)\n");
+ break;
+ case FLASH_AM400T:
+ printf("AM29LV400T (4 Mbit, top boot sector)\n");
+ break;
+ case FLASH_AM800B:
+ printf("AM29LV800B (8 Mbit, bottom boot sect)\n");
+ break;
+ case FLASH_AM800T:
+ printf("AM29LV800T (8 Mbit, top boot sector)\n");
+ break;
+ case FLASH_AM160B:
+ printf("AM29LV160B (16 Mbit, bottom boot sect)\n");
+ break;
+ case FLASH_AM160T:
+ printf("AM29LV160T (16 Mbit, top boot sector)\n");
+ break;
+ case FLASH_AM320B:
+ printf("AM29LV320B (32 Mbit, bottom boot sect)\n");
+ break;
+ case FLASH_AM320T:
+ printf("AM29LV320T (32 Mbit, top boot sector)\n");
+ break;
+ default:
+ printf("Unknown Chip Type\n");
+ 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");
+}
+
+/*-----------------------------------------------------------------------
+ */
+
+
+/*-----------------------------------------------------------------------
+ */
+
+/*
+ * The following code cannot be run from FLASH!
+ */
+
+static ulong flash_get_size(vu_long * addr, flash_info_t * info)
+{
+ short i;
+ uchar mid;
+ uchar pid;
+ vu_char *caddr = (vu_char *) addr;
+ ulong base = (ulong) addr;
+
+ /* Write auto select command: read Manufacturer ID */
+ caddr[0x0555] = 0xAA;
+ caddr[0x02AA] = 0x55;
+ caddr[0x0555] = 0x90;
+
+ mid = caddr[0];
+ switch (mid) {
+ case (AMD_MANUFACT & 0xFF):
+ info->flash_id = FLASH_MAN_AMD;
+ break;
+ case (FUJ_MANUFACT & 0xFF):
+ info->flash_id = FLASH_MAN_FUJ;
+ break;
+ case (MX_MANUFACT & 0xFF):
+ info->flash_id = FLASH_MAN_MX;
+ break;
+ case (STM_MANUFACT & 0xFF):
+ info->flash_id = FLASH_MAN_STM;
+ break;
+ default:
+ info->flash_id = FLASH_UNKNOWN;
+ info->sector_count = 0;
+ info->size = 0;
+ return (0); /* no or unknown flash */
+ }
+
+ pid = caddr[1]; /* device ID */
+ switch (pid) {
+ case (AMD_ID_LV400T & 0xFF):
+ info->flash_id += FLASH_AM400T;
+ info->sector_count = 11;
+ info->size = 0x00080000;
+ break; /* => 512 kB */
+
+ case (AMD_ID_LV400B & 0xFF):
+ info->flash_id += FLASH_AM400B;
+ info->sector_count = 11;
+ info->size = 0x00080000;
+ break; /* => 512 kB */
+
+ case (AMD_ID_LV800T & 0xFF):
+ info->flash_id += FLASH_AM800T;
+ info->sector_count = 19;
+ info->size = 0x00100000;
+ break; /* => 1 MB */
+
+ case (AMD_ID_LV800B & 0xFF):
+ info->flash_id += FLASH_AM800B;
+ info->sector_count = 19;
+ info->size = 0x00100000;
+ break; /* => 1 MB */
+
+ case (AMD_ID_LV160T & 0xFF):
+ info->flash_id += FLASH_AM160T;
+ info->sector_count = 35;
+ info->size = 0x00200000;
+ break; /* => 2 MB */
+
+ case (AMD_ID_LV160B & 0xFF):
+ info->flash_id += FLASH_AM160B;
+ info->sector_count = 35;
+ info->size = 0x00200000;
+ break; /* => 2 MB */
+
+ case (AMD_ID_LV040B & 0xFF):
+ info->flash_id += FLASH_AM040;
+ info->sector_count = 8;
+ info->size = 0x00080000;
+ break;
+
+ case (STM_ID_M29W040B & 0xFF):
+ info->flash_id += FLASH_AM040;
+ info->sector_count = 8;
+ info->size = 0x00080000;
+ break;
+
+#if 0 /* enable when device IDs are available */
+ case (AMD_ID_LV320T & 0xFF):
+ info->flash_id += FLASH_AM320T;
+ info->sector_count = 67;
+ info->size = 0x00400000;
+ break; /* => 4 MB */
+
+ case (AMD_ID_LV320B & 0xFF):
+ info->flash_id += FLASH_AM320B;
+ info->sector_count = 67;
+ info->size = 0x00400000;
+ break; /* => 4 MB */
+#endif
+ default:
+ info->flash_id = FLASH_UNKNOWN;
+ return (0); /* => no or unknown flash */
+
+ }
+
+ printf(" ");
+ /* set up sector start address table */
+ if ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM040) {
+ for (i = 0; i < info->sector_count; i++) {
+ info->start[i] = base + (i * 0x00010000);
+ }
+ } else if (info->flash_id & FLASH_BTYPE) {
+ /* set sector offsets for bottom boot block type */
+ info->start[0] = base + 0x00000000;
+ info->start[1] = base + 0x00004000;
+ info->start[2] = base + 0x00006000;
+ info->start[3] = base + 0x00008000;
+ for (i = 4; i < info->sector_count; i++) {
+ info->start[i] = base + (i * 0x00010000) - 0x00030000;
+ }
+ } else {
+ /* set sector offsets for top boot block type */
+ i = info->sector_count - 1;
+ info->start[i--] = base + info->size - 0x00004000;
+ info->start[i--] = base + info->size - 0x00006000;
+ info->start[i--] = base + info->size - 0x00008000;
+ for (; i >= 0; i--) {
+ info->start[i] = base + i * 0x00010000;
+ }
+ }
+
+ /* check for protected sectors */
+ for (i = 0; i < info->sector_count; i++) {
+ /* read sector protection: D0 = 1 if protected */
+ caddr = (volatile unsigned char *)(info->start[i]);
+ info->protect[i] = caddr[2] & 1;
+ }
+
+ /*
+ * Prevent writes to uninitialized FLASH.
+ */
+ if (info->flash_id != FLASH_UNKNOWN) {
+ caddr = (vu_char *) info->start[0];
+
+ caddr[0x0555] = 0xAA;
+ caddr[0x02AA] = 0x55;
+ caddr[0x0555] = 0xF0;
+
+ udelay(20000);
+ }
+
+ return (info->size);
+}
+
+
+/*-----------------------------------------------------------------------
+ */
+
+int flash_erase(flash_info_t * info, int s_first, int s_last)
+{
+ vu_char *addr = (vu_char *) (info->start[0]);
+ int flag, prot, sect, l_sect;
+ ulong start, now, last;
+
+ if ((s_first < 0) || (s_first > s_last)) {
+ if (info->flash_id == FLASH_UNKNOWN) {
+ printf("- missing\n");
+ } else {
+ printf("- no sectors to erase\n");
+ }
+ return 1;
+ }
+
+ if ((info->flash_id == FLASH_UNKNOWN) ||
+ (info->flash_id > FLASH_AMD_COMP)) {
+ printf("Can't erase unknown flash type %08lx - aborted\n", info->flash_id);
+ 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");
+ }
+
+ l_sect = -1;
+
+ /* Disable interrupts which might cause a timeout here */
+ flag = disable_interrupts();
+
+ addr[0x0555] = 0xAA;
+ addr[0x02AA] = 0x55;
+ addr[0x0555] = 0x80;
+ addr[0x0555] = 0xAA;
+ addr[0x02AA] = 0x55;
+
+ /* Start erase on unprotected sectors */
+ for (sect = s_first; sect <= s_last; sect++) {
+ if (info->protect[sect] == 0) { /* not protected */
+ addr = (vu_char *) (info->start[sect]);
+ addr[0] = 0x30;
+ l_sect = sect;
+ }
+ }
+
+ /* re-enable interrupts if necessary */
+ if (flag)
+ enable_interrupts();
+
+ /* wait at least 80us - let's wait 1 ms */
+ udelay(1000);
+
+ /*
+ * We wait for the last triggered sector
+ */
+ if (l_sect < 0)
+ goto DONE;
+
+ start = get_timer(0);
+ last = start;
+ addr = (vu_char *) (info->start[l_sect]);
+ while ((addr[0] & 0x80) != 0x80) {
+ if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
+ printf("Timeout\n");
+ return 1;
+ }
+ /* show that we're waiting */
+ if ((now - last) > 1000) { /* every second */
+ putc('.');
+ last = now;
+ }
+ }
+
+DONE:
+ /* reset to read mode */
+ addr = (vu_char *) info->start[0];
+ addr[0] = 0xF0; /* reset bank */
+
+ printf(" done\n");
+ 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)
+{
+ int rc;
+
+ while (cnt > 0) {
+ if ((rc = write_byte(info, addr++, *src++)) != 0) {
+ return (rc);
+ }
+ --cnt;
+ }
+
+ return (0);
+}
+
+/*-----------------------------------------------------------------------
+ * Write a word to Flash, returns:
+ * 0 - OK
+ * 1 - write timeout
+ * 2 - Flash not erased
+ */
+static int write_byte(flash_info_t * info, ulong dest, uchar data)
+{
+ vu_char *addr = (vu_char *) (info->start[0]);
+ ulong start;
+ int flag;
+
+ /* Check if Flash is (sufficiently) erased */
+ if ((*((vu_char *) dest) & data) != data) {
+ return (2);
+ }
+ /* Disable interrupts which might cause a timeout here */
+ flag = disable_interrupts();
+
+ addr[0x0555] = 0xAA;
+ addr[0x02AA] = 0x55;
+ addr[0x0555] = 0xA0;
+
+ *((vu_char *) dest) = data;
+
+ /* re-enable interrupts if necessary */
+ if (flag)
+ enable_interrupts();
+
+ /* data polling for D7 */
+ start = get_timer(0);
+ while ((*((vu_char *) dest) & 0x80) != (data & 0x80)) {
+ if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
+ return (1);
+ }
+ }
+ return (0);
+}
generated by cgit v1.1 at 2024-11-22 15:41:19 +0000