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-rw-r--r--board/iphase4539/flash.c490
1 files changed, 490 insertions, 0 deletions
diff --git a/board/iphase4539/flash.c b/board/iphase4539/flash.c
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--- /dev/null
+++ b/board/iphase4539/flash.c
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+/*
+ * (C) Copyright 2001
+ * Josh Huber <huber@mclx.com>, Mission Critical Linux, Inc.
+ *
+ * (C) Copyright 2002
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * Adapted for Interphase 4539 by Wolfgang Grandegger <wg@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 <config.h>
+#include <common.h>
+#include <flash.h>
+#include <asm/io.h>
+
+flash_info_t flash_info[CFG_MAX_FLASH_BANKS];
+
+extern int hwc_flash_size(void);
+static ulong flash_get_size (u32 addr, flash_info_t *info);
+static int flash_get_offsets (u32 base, flash_info_t *info);
+static int write_word (flash_info_t *info, ulong dest, ulong data);
+static void flash_reset (u32 addr);
+
+#define out8(a,v) *(volatile unsigned char*)(a) = v
+#define in8(a) *(volatile unsigned char*)(a)
+#define in32(a) *(volatile unsigned long*)(a)
+#define iobarrier_rw() eieio()
+
+unsigned long flash_init (void)
+{
+ unsigned int i;
+ unsigned long flash_size = 0;
+ unsigned long bank_size;
+ unsigned int bank = 0;
+
+ /* 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 = 0;
+ flash_info[i].size = 0;
+ }
+
+ /* Initialise the BOOT Flash */
+ if (bank == CFG_MAX_FLASH_BANKS) {
+ puts ("Warning: not all Flashes are initialised !");
+ return flash_size;
+ }
+
+ bank_size = flash_get_size (CFG_FLASH_BASE, flash_info + bank);
+ if (bank_size) {
+#if CFG_MONITOR_BASE >= CFG_FLASH_BASE && \
+ CFG_MONITOR_BASE < CFG_FLASH_BASE + CFG_MAX_FLASH_SIZE
+ /* monitor protection ON by default */
+ flash_protect(FLAG_PROTECT_SET,
+ CFG_MONITOR_BASE,
+ CFG_MONITOR_BASE + CFG_MONITOR_LEN - 1,
+ flash_info + bank);
+#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_SECT_SIZE - 1,
+ flash_info + bank);
+#endif
+
+ /* HWC protection ON by default */
+ flash_protect(FLAG_PROTECT_SET,
+ CFG_FLASH_BASE,
+ CFG_FLASH_BASE + 0x10000 - 1,
+ flash_info + bank);
+
+ flash_size += bank_size;
+ bank++;
+ } else {
+ puts ("Warning: the BOOT Flash is not initialised !");
+ }
+
+ return flash_size;
+}
+
+/*
+ * The following code cannot be run from FLASH!
+ */
+static ulong flash_get_size (u32 addr, flash_info_t *info)
+{
+ volatile uchar value;
+#if 0
+ int i;
+#endif
+
+ /* Write auto select command: read Manufacturer ID */
+ out8(addr + 0x0555, 0xAA);
+ iobarrier_rw();
+ udelay(10);
+ out8(addr + 0x02AA, 0x55);
+ iobarrier_rw();
+ udelay(10);
+ out8(addr + 0x0555, 0x90);
+ iobarrier_rw();
+ udelay(10);
+
+ value = in8(addr);
+ iobarrier_rw();
+ udelay(10);
+ switch (value | (value << 16)) {
+ case AMD_MANUFACT:
+ info->flash_id = FLASH_MAN_AMD;
+ break;
+
+ case FUJ_MANUFACT:
+ info->flash_id = FLASH_MAN_FUJ;
+ break;
+
+ default:
+ info->flash_id = FLASH_UNKNOWN;
+ flash_reset (addr);
+ return 0;
+ }
+
+ value = in8(addr + 1); /* device ID */
+ iobarrier_rw();
+
+ switch (value) {
+ case AMD_ID_LV033C:
+ info->flash_id += FLASH_AM033C;
+ info->size = hwc_flash_size();
+ if (info->size > CFG_MAX_FLASH_SIZE) {
+ printf("U-Boot supports only %d MB\n",
+ CFG_MAX_FLASH_SIZE);
+ info->size = CFG_MAX_FLASH_SIZE;
+ }
+ info->sector_count = info->size / 0x10000;
+ break; /* => 4 MB */
+
+ default:
+ info->flash_id = FLASH_UNKNOWN;
+ flash_reset (addr);
+ return (0); /* => no or unknown flash */
+
+ }
+
+ if (!flash_get_offsets (addr, info)) {
+ flash_reset (addr);
+ return 0;
+ }
+
+#if 0
+ /* 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 */
+ value = in8(info->start[i] + 2);
+ iobarrier_rw();
+ info->protect[i] = (value & 1) != 0;
+ }
+#endif
+
+ /*
+ * Reset bank to read mode
+ */
+ flash_reset (addr);
+
+ return (info->size);
+}
+
+static int flash_get_offsets (u32 base, flash_info_t *info)
+{
+ unsigned int i, size;
+
+ switch (info->flash_id & FLASH_TYPEMASK) {
+ case FLASH_AM033C:
+ /* set sector offsets for uniform sector type */
+ size = info->size / info->sector_count;
+ for (i = 0; i < info->sector_count; i++) {
+ info->start[i] = base + i * size;
+ }
+ break;
+ default:
+ return 0;
+ }
+
+ return 1;
+}
+
+int flash_erase (flash_info_t *info, int s_first, int s_last)
+{
+ volatile u32 addr = 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();
+
+ out8(addr + 0x555, 0xAA);
+ iobarrier_rw();
+ out8(addr + 0x2AA, 0x55);
+ iobarrier_rw();
+ out8(addr + 0x555, 0x80);
+ iobarrier_rw();
+ out8(addr + 0x555, 0xAA);
+ iobarrier_rw();
+ out8(addr + 0x2AA, 0x55);
+ iobarrier_rw();
+
+ /* Start erase on unprotected sectors */
+ for (sect = s_first; sect<=s_last; sect++) {
+ if (info->protect[sect] == 0) { /* not protected */
+ addr = info->start[sect];
+ out8(addr, 0x30);
+ iobarrier_rw();
+ 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 = info->start[l_sect];
+ while ((in8(addr) & 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;
+ }
+ iobarrier_rw();
+ }
+
+DONE:
+ /* reset to read mode */
+ flash_reset (info->start[0]);
+
+ 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)
+{
+ volatile u32 addr = info->start[0];
+ ulong start;
+ int flag, i;
+
+ /* Check if Flash is (sufficiently) erased */
+ if ((in32(dest) & data) != data) {
+ return (2);
+ }
+ /* Disable interrupts which might cause a timeout here */
+ flag = disable_interrupts();
+
+ /* first, perform an unlock bypass command to speed up flash writes */
+ out8(addr + 0x555, 0xAA);
+ iobarrier_rw();
+ out8(addr + 0x2AA, 0x55);
+ iobarrier_rw();
+ out8(addr + 0x555, 0x20);
+ iobarrier_rw();
+
+ /* write each byte out */
+ for (i = 0; i < 4; i++) {
+ char *data_ch = (char *)&data;
+ out8(addr, 0xA0);
+ iobarrier_rw();
+ out8(dest+i, data_ch[i]);
+ iobarrier_rw();
+ udelay(10); /* XXX */
+ }
+
+ /* we're done, now do an unlock bypass reset */
+ out8(addr, 0x90);
+ iobarrier_rw();
+ out8(addr, 0x00);
+ iobarrier_rw();
+
+ /* re-enable interrupts if necessary */
+ if (flag)
+ enable_interrupts();
+
+ /* data polling for D7 */
+ start = get_timer (0);
+ while ((in32(dest) & 0x80808080) != (data & 0x80808080)) {
+ if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
+ return (1);
+ }
+ iobarrier_rw();
+ }
+
+ flash_reset (addr);
+
+ return (0);
+}
+
+/*
+ * Reset bank to read mode
+ */
+static void flash_reset (u32 addr)
+{
+ out8(addr, 0xF0); /* reset bank */
+ iobarrier_rw();
+}
+
+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_BM: printf ("BRIGHT MICRO "); break;
+ default: printf ("Unknown Vendor "); break;
+ }
+
+ switch (info->flash_id & FLASH_TYPEMASK) {
+ case FLASH_AM033C: printf ("AM29LV033C (32 Mbit, uniform sectors)\n");
+ break;
+ default: printf ("Unknown Chip Type\n");
+ break;
+ }
+
+ if (info->size % 0x100000 == 0) {
+ printf (" Size: %ld MB in %d Sectors\n",
+ info->size / 0x100000, info->sector_count);
+ }
+ else if (info->size % 0x400 == 0) {
+ printf (" Size: %ld KB in %d Sectors\n",
+ info->size / 0x400, info->sector_count);
+ }
+ else {
+ printf (" Size: %ld B in %d Sectors\n",
+ info->size, 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");
+}
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