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Diffstat (limited to 'board/amcc/yellowstone/flash.c')
-rw-r--r--board/amcc/yellowstone/flash.c572
1 files changed, 572 insertions, 0 deletions
diff --git a/board/amcc/yellowstone/flash.c b/board/amcc/yellowstone/flash.c
new file mode 100644
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+++ b/board/amcc/yellowstone/flash.c
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+/*
+ * (C) Copyright 2002-2004
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * (C) Copyright 2002 Jun Gu <jung@artesyncp.com>
+ * Add support for Am29F016D and dynamic switch setting.
+ *
+ * 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
+ */
+
+/*
+ * Modified 4/5/2001
+ * Wait for completion of each sector erase command issued
+ * 4/5/2001
+ * Chris Hallinan - DS4.COM, Inc. - clh@net1plus.com
+ */
+
+/*
+ * Ported to XPedite1000, 1/2 mb boot flash only
+ * Travis B. Sawyer, <travis.sawyer@sandburst.com>
+ */
+
+#include <common.h>
+#include <ppc4xx.h>
+#include <asm/processor.h>
+
+#undef DEBUG
+#ifdef DEBUG
+#define DEBUGF(x...) printf(x)
+#else
+#define DEBUGF(x...)
+#endif /* DEBUG */
+
+#define BOOT_SMALL_FLASH 32 /* 00100000 */
+#define FLASH_ONBD_N 2 /* 00000010 */
+#define FLASH_SRAM_SEL 1 /* 00000001 */
+
+#define BOOT_SMALL_FLASH_VAL 4
+#define FLASH_ONBD_N_VAL 2
+#define FLASH_SRAM_SEL_VAL 1
+
+flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */
+
+unsigned long flash_addr_table[512][CFG_MAX_FLASH_BANKS] = {
+ {0xfe000000}
+
+};
+
+/*-----------------------------------------------------------------------
+ * Functions
+ */
+static ulong flash_get_size(vu_long * addr, flash_info_t * info);
+static int write_word(flash_info_t * info, ulong dest, ulong data);
+
+#define ADDR0 0xaaaa
+#define ADDR1 0x5554
+#define FLASH_WORD_SIZE unsigned short
+
+/*-----------------------------------------------------------------------
+ */
+
+unsigned long flash_init(void)
+{
+ unsigned long total_b = 0;
+ unsigned long size_b[CFG_MAX_FLASH_BANKS];
+ unsigned short index = 0;
+ int i;
+
+ DEBUGF("\n");
+ DEBUGF("FLASH: Index: %d\n", index);
+
+ /* Init: no FLASHes known */
+ for (i = 0; i < CFG_MAX_FLASH_BANKS; ++i) {
+ flash_info[i].flash_id = FLASH_UNKNOWN;
+ flash_info[i].sector_count = -1;
+ flash_info[i].size = 0;
+
+ /* check whether the address is 0 */
+ if (flash_addr_table[index][i] == 0) {
+ continue;
+ }
+
+ /* call flash_get_size() to initialize sector address */
+ size_b[i] = flash_get_size((vu_long *)
+ flash_addr_table[index][i],
+ &flash_info[i]);
+ flash_info[i].size = size_b[i];
+ if (flash_info[i].flash_id == FLASH_UNKNOWN) {
+ printf
+ ("## Unknown FLASH on Bank %d - Size = 0x%08lx = %ld MB\n",
+ i, size_b[i], size_b[i] << 20);
+ flash_info[i].sector_count = -1;
+ flash_info[i].size = 0;
+ }
+
+ total_b += flash_info[i].size;
+ }
+
+ /* FLASH protect Monitor */
+ flash_protect(FLAG_PROTECT_SET,
+ CFG_MONITOR_BASE, 0xFFFFFFFF, &flash_info[0]);
+
+ return total_b;
+}
+
+/*-----------------------------------------------------------------------
+ */
+void flash_print_info(flash_info_t * info)
+{
+ int i;
+ int k;
+ int size;
+ int erased;
+ volatile unsigned long *flash;
+
+ 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_SST:
+ printf("SST ");
+ break;
+ default:
+ printf("Unknown Vendor ");
+ break;
+ }
+
+ switch (info->flash_id & FLASH_TYPEMASK) {
+ case FLASH_AMD016:
+ printf("AM29F016D (16 Mbit, uniform sector size)\n");
+ break;
+ case FLASH_AM040:
+ printf("AM29F040 (512 Kbit, uniform sector size)\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;
+ case FLASH_SST800A:
+ printf("SST39LF/VF800 (8 Mbit, uniform sector size)\n");
+ break;
+ case FLASH_SST160A:
+ printf("SST39LF/VF160 (16 Mbit, uniform sector size)\n");
+ break;
+ default:
+ printf("Unknown Chip Type\n");
+ break;
+ }
+
+ 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 long *)info->start[i];
+ size = size >> 2; /* divide by 4 for longword access */
+ for (k = 0; k < size; k++) {
+ if (*flash++ != 0xffffffff) {
+ erased = 0;
+ break;
+ }
+ }
+
+ if ((i % 5) == 0)
+ printf("\n ");
+ printf(" %08lX%s%s",
+ info->start[i],
+ erased ? " E" : " ", info->protect[i] ? "RO " : " ");
+ }
+ printf("\n");
+ return;
+}
+
+/*-----------------------------------------------------------------------
+ */
+
+/*-----------------------------------------------------------------------
+ */
+
+/*
+ * The following code cannot be run from FLASH!
+ */
+static ulong flash_get_size(vu_long * addr, flash_info_t * info)
+{
+ short i;
+ FLASH_WORD_SIZE value;
+ ulong base = (ulong) addr;
+ volatile FLASH_WORD_SIZE *addr2 = (FLASH_WORD_SIZE *) addr;
+
+ DEBUGF("FLASH ADDR: %08x\n", (unsigned)addr);
+
+ /* Write auto select command: read Manufacturer ID */
+ udelay(10000);
+ *(FLASH_WORD_SIZE *) ((int)addr + ADDR0) = (FLASH_WORD_SIZE) 0x00AA;
+ udelay(1000);
+ *(FLASH_WORD_SIZE *) ((int)addr + ADDR1) = (FLASH_WORD_SIZE) 0x0055;
+ udelay(1000);
+ *(FLASH_WORD_SIZE *) ((int)addr + ADDR0) = (FLASH_WORD_SIZE) 0x0090;
+ udelay(1000);
+
+ value = addr2[0];
+
+ DEBUGF("FLASH MANUFACT: %x\n", value);
+
+ switch (value) {
+ case (FLASH_WORD_SIZE) AMD_MANUFACT:
+ info->flash_id = FLASH_MAN_AMD;
+ break;
+ case (FLASH_WORD_SIZE) FUJ_MANUFACT:
+ info->flash_id = FLASH_MAN_FUJ;
+ break;
+ case (FLASH_WORD_SIZE) SST_MANUFACT:
+ info->flash_id = FLASH_MAN_SST;
+ break;
+ case (FLASH_WORD_SIZE) STM_MANUFACT:
+ 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 */
+ }
+
+#ifdef CONFIG_ADCIOP
+ value = addr2[0]; /* device ID */
+ debug("\ndev_code=%x\n", value);
+#else
+ value = addr2[1]; /* device ID */
+#endif
+
+ DEBUGF("\nFLASH DEVICEID: %x\n", value);
+
+ info->flash_id = 0;
+ info->sector_count = CFG_MAX_FLASH_SECT;
+ info->size = 0x02000000;
+
+ /* set up sector start address table */
+ for (i = 0; i < info->sector_count; i++) {
+ info->start[i] = (int)base + (i * 0x00020000);
+ info->protect[i] = 0;
+ }
+
+ *(FLASH_WORD_SIZE *) ((int)addr) = (FLASH_WORD_SIZE) 0x00F0; /* reset bank */
+
+ return (info->size);
+}
+
+int wait_for_DQ7(flash_info_t * info, int sect)
+{
+ ulong start, now, last;
+ volatile FLASH_WORD_SIZE *addr =
+ (FLASH_WORD_SIZE *) (info->start[sect]);
+
+ start = get_timer(0);
+ last = start;
+ while ((addr[0] & (FLASH_WORD_SIZE) 0x00800080) !=
+ (FLASH_WORD_SIZE) 0x00800080) {
+ 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;
+ }
+ }
+ return 0;
+}
+
+/*-----------------------------------------------------------------------
+ */
+
+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 flag, prot, sect, l_sect;
+ int i;
+
+ 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) {
+ printf("Can't erase unknown flash type - aborted\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");
+ }
+
+ l_sect = -1;
+
+ /* Disable interrupts which might cause a timeout here */
+ flag = disable_interrupts();
+
+ /* Start erase on unprotected sectors */
+ for (sect = s_first; sect <= s_last; sect++) {
+ if (info->protect[sect] == 0) { /* not protected */
+ addr2 = (FLASH_WORD_SIZE *) (info->start[sect]);
+ printf("Erasing sector %p\n", addr2);
+ *(FLASH_WORD_SIZE *) ((int)addr + ADDR0) =
+ (FLASH_WORD_SIZE) 0x00AA;
+ asm("sync");
+ asm("isync");
+ *(FLASH_WORD_SIZE *) ((int)addr + ADDR1) =
+ (FLASH_WORD_SIZE) 0x0055;
+ asm("sync");
+ asm("isync");
+ *(FLASH_WORD_SIZE *) ((int)addr + ADDR0) =
+ (FLASH_WORD_SIZE) 0x0080;
+ asm("sync");
+ asm("isync");
+ *(FLASH_WORD_SIZE *) ((int)addr + ADDR0) =
+ (FLASH_WORD_SIZE) 0x00AA;
+ asm("sync");
+ asm("isync");
+ *(FLASH_WORD_SIZE *) ((int)addr + ADDR1) =
+ (FLASH_WORD_SIZE) 0x0055;
+ asm("sync");
+ asm("isync");
+ addr2[0] = (FLASH_WORD_SIZE) 0x00300030; /* sector erase */
+ asm("sync");
+ asm("isync");
+
+ l_sect = sect;
+ /*
+ * Wait for each sector to complete, it's more
+ * reliable. According to AMD Spec, you must
+ * issue all erase commands within a specified
+ * timeout. This has been seen to fail, especially
+ * if printf()s are included (for debug)!!
+ */
+ wait_for_DQ7(info, sect);
+ }
+ }
+
+ /* re-enable interrupts if necessary */
+ if (flag)
+ enable_interrupts();
+
+ /* wait at least 80us - let's wait 1 ms */
+ udelay(1000);
+
+#if 0
+ /*
+ * We wait for the last triggered sector
+ */
+ if (l_sect < 0)
+ goto DONE;
+ wait_for_DQ7(info, l_sect);
+
+ DONE:
+#endif
+ /* reset to read mode */
+ addr = (FLASH_WORD_SIZE *) info->start[0];
+ addr[0] = (FLASH_WORD_SIZE) 0x00F000F0; /* 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)
+{
+ ulong cp, wp, data;
+ int i, l, rc;
+ ulong status_value = 0;
+
+ 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);
+ }
+ for (; i < 4 && cnt > 0; ++i) {
+ data = (data << 8) | *src++;
+ --cnt;
+ ++cp;
+ }
+ for (; cnt == 0 && i < 4; ++i, ++cp) {
+ data = (data << 8) | (*(uchar *) cp);
+ }
+
+ if ((rc = write_word(info, wp, data)) != 0) {
+ return (rc);
+ }
+ wp += 4;
+ }
+
+ /*
+ * handle word aligned part
+ */
+ while (cnt >= 4) {
+
+ /*print status if needed */
+ if ((wp >= (status_value + 0x20000))
+ && (status_value < 0xFFFE0000)) {
+ status_value = wp;
+ printf("writing to sector 0x%X\n", status_value);
+ }
+
+ data = 0;
+ for (i = 0; i < 4; ++i) {
+ data = (data << 8) | *src++;
+ }
+ if ((rc = write_word(info, wp, data)) != 0) {
+ return (rc);
+ }
+ wp += 4;
+ cnt -= 4;
+ }
+
+ if (cnt == 0) {
+ return (0);
+ }
+
+ /*
+ * handle unaligned tail bytes
+ */
+ data = 0;
+ for (i = 0, cp = wp; i < 4 && cnt > 0; ++i, ++cp) {
+ data = (data << 8) | *src++;
+ --cnt;
+ }
+ for (; i < 4; ++i, ++cp) {
+ data = (data << 8) | (*(uchar *) cp);
+ }
+
+ return (write_word(info, wp, data));
+}
+
+/*-----------------------------------------------------------------------
+ * Write a word to Flash, returns:
+ * 0 - OK
+ * 1 - write timeout
+ * 2 - Flash not erased
+ */
+static int write_word(flash_info_t * info, ulong dest, ulong data)
+{
+ volatile vu_long *addr2 = (vu_long *) (info->start[0]);
+ volatile FLASH_WORD_SIZE *dest2 = (FLASH_WORD_SIZE *) dest;
+ volatile FLASH_WORD_SIZE *data2 = (FLASH_WORD_SIZE *) & data;
+ ulong start;
+ int i;
+
+ /* Check if Flash is (sufficiently) erased */
+ if ((*((volatile FLASH_WORD_SIZE *)dest) &
+ (FLASH_WORD_SIZE) data) != (FLASH_WORD_SIZE) data) {
+ return (2);
+ }
+
+ for (i = 0; i < 4 / sizeof(FLASH_WORD_SIZE); i++) {
+ int flag;
+
+ /* Disable interrupts which might cause a timeout here */
+ flag = disable_interrupts();
+
+ *(FLASH_WORD_SIZE *) ((int)addr2 + ADDR0) =
+ (FLASH_WORD_SIZE) 0x00AA;
+ asm("sync");
+ asm("isync");
+ *(FLASH_WORD_SIZE *) ((int)addr2 + ADDR1) =
+ (FLASH_WORD_SIZE) 0x0055;
+ asm("sync");
+ asm("isync");
+ *(FLASH_WORD_SIZE *) ((int)addr2 + ADDR0) =
+ (FLASH_WORD_SIZE) 0x00A0;
+ asm("sync");
+ asm("isync");
+
+ dest2[i] = data2[i];
+
+ /* re-enable interrupts if necessary */
+ if (flag)
+ enable_interrupts();
+
+ /* data polling for D7 */
+ start = get_timer(0);
+ while ((dest2[i] & (FLASH_WORD_SIZE) 0x00800080) !=
+ (data2[i] & (FLASH_WORD_SIZE) 0x00800080)) {
+
+ if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
+ return (1);
+ }
+ }
+ }
+
+ return (0);
+}
+
+/*-----------------------------------------------------------------------
+ */
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