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-rw-r--r--board/sacsng/flash.c523
1 files changed, 523 insertions, 0 deletions
diff --git a/board/sacsng/flash.c b/board/sacsng/flash.c
new file mode 100644
index 0000000..4fd04df
--- /dev/null
+++ b/board/sacsng/flash.c
@@ -0,0 +1,523 @@
+/*
+ * (C) Copyright 2001
+ * 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 <configs/sacsng.h>
+
+
+#undef DEBUG
+
+#ifndef CFG_ENV_ADDR
+#define CFG_ENV_ADDR (CFG_FLASH_BASE + CFG_ENV_OFFSET)
+#endif
+#ifndef CFG_ENV_SIZE
+#define CFG_ENV_SIZE CFG_ENV_SECT_SIZE
+#endif
+
+
+flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */
+
+/*-----------------------------------------------------------------------
+ * Functions
+ */
+static ulong flash_get_size (vu_short *addr, flash_info_t *info);
+static int write_word (flash_info_t *info, ulong dest, ulong data);
+
+/*-----------------------------------------------------------------------
+ */
+
+unsigned long flash_init (void)
+{
+ unsigned long size_b0, size_b1;
+ int i;
+
+ /* Init: no FLASHes known */
+ for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) {
+ flash_info[i].flash_id = FLASH_UNKNOWN;
+ }
+
+ size_b0 = flash_get_size((vu_short *)CFG_FLASH0_BASE, &flash_info[0]);
+
+ if (flash_info[0].flash_id == FLASH_UNKNOWN) {
+ printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
+ size_b0, size_b0<<20);
+ }
+
+ size_b1 = flash_get_size((vu_short *)CFG_FLASH1_BASE, &flash_info[1]);
+
+#if CFG_MONITOR_BASE >= CFG_FLASH_BASE
+ /* monitor protection ON by default */
+ flash_protect(FLAG_PROTECT_SET,
+ CFG_MONITOR_BASE,
+ CFG_MONITOR_BASE+CFG_MONITOR_LEN-1,
+ &flash_info[0]);
+#endif
+
+#ifdef CFG_ENV_IS_IN_FLASH
+ /* ENV protection ON by default */
+ flash_protect(FLAG_PROTECT_SET,
+ CFG_ENV_ADDR,
+ CFG_ENV_ADDR+CFG_ENV_SIZE-1,
+ &flash_info[0]);
+#endif
+
+ if (size_b1) {
+#if CFG_MONITOR_BASE >= CFG_FLASH_BASE
+ /* monitor protection ON by default */
+ flash_protect(FLAG_PROTECT_SET,
+ CFG_MONITOR_BASE,
+ CFG_MONITOR_BASE+CFG_MONITOR_LEN-1,
+ &flash_info[1]);
+#endif
+
+#ifdef CFG_ENV_IS_IN_FLASH
+ /* ENV protection ON by default */
+ flash_protect(FLAG_PROTECT_SET,
+ CFG_ENV_ADDR,
+ CFG_ENV_ADDR+CFG_ENV_SIZE-1,
+ &flash_info[1]);
+#endif
+ } else {
+ flash_info[1].flash_id = FLASH_UNKNOWN;
+ flash_info[1].sector_count = -1;
+ }
+
+ flash_info[0].size = size_b0;
+ flash_info[1].size = size_b1;
+
+ /*
+ * We only report the primary flash for U-Boot's use.
+ */
+ return (size_b0);
+}
+
+/*-----------------------------------------------------------------------
+ */
+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;
+ default: printf ("Unknown Vendor "); break;
+ }
+
+ switch (info->flash_id & FLASH_TYPEMASK) {
+ 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");
+ return;
+}
+
+/*-----------------------------------------------------------------------
+ */
+
+
+/*-----------------------------------------------------------------------
+ */
+
+/*
+ * The following code cannot be run from FLASH!
+ */
+
+static ulong flash_get_size (vu_short *addr, flash_info_t *info)
+{
+ short i;
+ ushort value;
+ ulong base = (ulong)addr;
+
+ /* Write auto select command: read Manufacturer ID */
+ addr[0x0555] = 0xAAAA;
+ addr[0x02AA] = 0x5555;
+ addr[0x0555] = 0x9090;
+ __asm__ __volatile__(" sync\n ");
+
+ value = addr[0];
+#ifdef DEBUG
+ printf("Flash manufacturer 0x%04X\n", value);
+#endif
+
+ if(value == (ushort)AMD_MANUFACT) {
+ info->flash_id = FLASH_MAN_AMD;
+ } else if (value == (ushort)FUJ_MANUFACT) {
+ info->flash_id = FLASH_MAN_FUJ;
+ } else {
+#ifdef DEBUG
+ printf("Unknown flash manufacturer 0x%04X\n", value);
+#endif
+ info->flash_id = FLASH_UNKNOWN;
+ info->sector_count = 0;
+ info->size = 0;
+ return (0); /* no or unknown flash */
+ }
+
+ value = addr[1]; /* device ID */
+#ifdef DEBUG
+ printf("Flash type 0x%04X\n", value);
+#endif
+
+ if(value == (ushort)AMD_ID_LV400T) {
+ info->flash_id += FLASH_AM400T;
+ info->sector_count = 11;
+ info->size = 0x00080000; /* => 0.5 MB */
+ } else if(value == (ushort)AMD_ID_LV400B) {
+ info->flash_id += FLASH_AM400B;
+ info->sector_count = 11;
+ info->size = 0x00080000; /* => 0.5 MB */
+ } else if(value == (ushort)AMD_ID_LV800T) {
+ info->flash_id += FLASH_AM800T;
+ info->sector_count = 19;
+ info->size = 0x00100000; /* => 1 MB */
+ } else if(value == (ushort)AMD_ID_LV800B) {
+ info->flash_id += FLASH_AM800B;
+ info->sector_count = 19;
+ info->size = 0x00100000; /* => 1 MB */
+ } else if(value == (ushort)AMD_ID_LV160T) {
+ info->flash_id += FLASH_AM160T;
+ info->sector_count = 35;
+ info->size = 0x00200000; /* => 2 MB */
+ } else if(value == (ushort)AMD_ID_LV160B) {
+ info->flash_id += FLASH_AM160B;
+ info->sector_count = 35;
+ info->size = 0x00200000; /* => 2 MB */
+ } else if(value == (ushort)AMD_ID_LV320T) {
+ info->flash_id += FLASH_AM320T;
+ info->sector_count = 67;
+ info->size = 0x00400000; /* => 4 MB */
+ } else if(value == (ushort)AMD_ID_LV320B) {
+ info->flash_id += FLASH_AM320B;
+ info->sector_count = 67;
+ info->size = 0x00400000; /* => 4 MB */
+ } else {
+#ifdef DEBUG
+ printf("Unknown flash type 0x%04X\n", value);
+ info->size = CFG_FLASH_SIZE;
+#else
+ info->flash_id = FLASH_UNKNOWN;
+ return (0); /* => no or unknown flash */
+#endif
+ }
+
+ /* set up sector start address table */
+ 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 - 3) * 0x00010000);
+ }
+ } 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 at sector address, (A7 .. A0) = 0x02 */
+ /* D0 = 1 if protected */
+ addr = (volatile unsigned short *)(info->start[i]);
+ info->protect[i] = addr[2] & 1;
+ }
+
+ /*
+ * Prevent writes to uninitialized FLASH.
+ */
+ if (info->flash_id != FLASH_UNKNOWN) {
+ addr = (volatile unsigned short *)info->start[0];
+
+ }
+
+ addr[0] = 0xF0F0; /* reset bank */
+ __asm__ __volatile__(" sync\n ");
+ return (info->size);
+}
+
+
+/*-----------------------------------------------------------------------
+ */
+
+int flash_erase (flash_info_t *info, int s_first, int s_last)
+{
+ vu_short *addr = (vu_short*)(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] = 0xAAAA;
+ addr[0x02AA] = 0x5555;
+ addr[0x0555] = 0x8080;
+ addr[0x0555] = 0xAAAA;
+ addr[0x02AA] = 0x5555;
+ __asm__ __volatile__(" sync\n ");
+
+ /* Start erase on unprotected sectors */
+ for (sect = s_first; sect<=s_last; sect++) {
+ if (info->protect[sect] == 0) { /* not protected */
+ addr = (vu_short*)(info->start[sect]);
+ addr[0] = 0x3030;
+ 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_short*)(info->start[l_sect]);
+ while ((addr[0] & 0x0080) != 0x0080) {
+ if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
+ printf ("Timeout\n");
+ addr[0] = 0xF0F0; /* reset bank */
+ __asm__ __volatile__(" sync\n ");
+ return 1;
+ }
+ /* show that we're waiting */
+ if ((now - last) > 1000) { /* every second */
+ putc ('.');
+ last = now;
+ }
+ }
+
+DONE:
+ /* reset to read mode */
+ addr = (vu_short*)info->start[0];
+ addr[0] = 0xF0F0; /* reset bank */
+ __asm__ __volatile__(" sync\n ");
+
+ 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;
+
+ 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) {
+ 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)
+{
+ vu_short *addr = (vu_short*)(info->start[0]);
+ ulong start;
+ int flag;
+ int j;
+
+ /* Check if Flash is (sufficiently) erased */
+ if (((*(vu_long *)dest) & data) != data) {
+ return (2);
+ }
+ /* Disable interrupts which might cause a timeout here */
+ flag = disable_interrupts();
+
+ /* The original routine was designed to write 32 bit words to
+ * 32 bit wide memory. We have 16 bit wide memory so we do
+ * two writes. We write the LSB first at dest+2 and then the
+ * MSB at dest (lousy big endian).
+ */
+ dest += 2;
+ for(j = 0; j < 2; j++) {
+ addr[0x0555] = 0xAAAA;
+ addr[0x02AA] = 0x5555;
+ addr[0x0555] = 0xA0A0;
+ __asm__ __volatile__(" sync\n ");
+
+ *((vu_short *)dest) = (ushort)data;
+
+ /* re-enable interrupts if necessary */
+ if (flag)
+ enable_interrupts();
+
+ /* data polling for D7 */
+ start = get_timer (0);
+ while (*(vu_short *)dest != (ushort)data) {
+ if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
+ return (1);
+ }
+ }
+ dest -= 2;
+ data >>= 16;
+ }
+ return (0);
+}
+
+/*-----------------------------------------------------------------------
+ */
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