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-rw-r--r--board/hymod/flash.c745
1 files changed, 745 insertions, 0 deletions
diff --git a/board/hymod/flash.c b/board/hymod/flash.c
new file mode 100644
index 0000000..ee052e3
--- /dev/null
+++ b/board/hymod/flash.c
@@ -0,0 +1,745 @@
+/*
+ * (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
+ *
+ * Hacked for the Hymod board by Murray.Jensen@cmst.csiro.au, 20-Oct-00
+ */
+
+#include <common.h>
+#include <mpc8260.h>
+#include <board/hymod/flash.h>
+
+flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */
+
+/*-----------------------------------------------------------------------
+ * Protection Flags:
+ */
+#define FLAG_PROTECT_SET 0x01
+#define FLAG_PROTECT_CLEAR 0x02
+
+/*-----------------------------------------------------------------------
+ * Functions
+ */
+#if 0
+static ulong flash_get_size (vu_long *addr, flash_info_t *info);
+static void flash_get_offsets (ulong base, flash_info_t *info);
+#endif
+static int write_word (flash_info_t *info, ulong dest, ulong data);
+
+/*-----------------------------------------------------------------------
+ */
+
+/*
+ * probe for the existence of flash at bank word address "addr"
+ * 0 = yes, 1 = bad Manufacturer's Id, 2 = bad Device Id
+ */
+static int
+bank_probe_word(bank_addr_t addr)
+{
+ int retval;
+
+ /* reset the flash */
+ *addr = BANK_CMD_RST;
+
+ /* check the manufacturer id */
+ *addr = BANK_CMD_RD_ID;
+ if (*BANK_ADDR_REG_MAN(addr) != BANK_RD_ID_MAN) {
+ retval = -1;
+ goto out;
+ }
+
+ /* check the device id */
+ *addr = BANK_CMD_RD_ID;
+ if (*BANK_ADDR_REG_DEV(addr) != BANK_RD_ID_DEV) {
+ retval = -2;
+ goto out;
+ }
+
+ retval = CFG_FLASH_TYPE;
+
+out:
+ /* reset the flash again */
+ *addr = BANK_CMD_RST;
+
+ return retval;
+}
+
+/*
+ * probe for flash banks at address "base" and store info for any found
+ * into flash_info entry "fip". Must find at least one bank.
+ */
+static void
+bank_probe(flash_info_t *fip, bank_addr_t base)
+{
+ bank_addr_t addr, eaddr;
+ int nbanks;
+
+ fip->flash_id = FLASH_UNKNOWN;
+ fip->size = 0L;
+ fip->sector_count = 0;
+
+ addr = base;
+ eaddr = BANK_ADDR_BASE(addr, MAX_BANKS);
+ nbanks = 0;
+
+ while (addr < eaddr) {
+ bank_addr_t addrw, eaddrw, addrb;
+ int i, osc, nsc, curtype = -1;
+
+ addrw = addr;
+ eaddrw = BANK_ADDR_NEXT_WORD(addrw);
+
+ while (addrw < eaddrw) {
+ int thistype;
+
+#ifdef FLASH_DEBUG
+ printf(" probing for flash at addr 0x%08lx\n",
+ (unsigned long)addrw);
+#endif
+ if ((thistype = bank_probe_word(addrw++)) < 0)
+ goto out;
+
+ if (curtype < 0)
+ curtype = thistype;
+ else {
+ if (thistype != curtype) {
+ printf("Differing flash type found!\n");
+ goto out;
+ }
+ }
+ }
+
+ if (curtype < 0)
+ goto out;
+
+ /* bank exists - append info for this bank to *fip */
+ fip->flash_id = FLASH_MAN_INTEL|curtype;
+ fip->size += BANK_SIZE;
+ osc = fip->sector_count;
+ fip->sector_count += BANK_NBLOCKS;
+ if ((nsc = fip->sector_count) >= CFG_MAX_FLASH_SECT)
+ panic("Too many sectors in flash at address 0x%08lx\n",
+ (unsigned long)base);
+
+ addrb = addr;
+ for (i = osc; i < nsc; i++) {
+ fip->start[i] = (ulong)addrb;
+ fip->protect[i] = 0;
+ addrb = BANK_ADDR_NEXT_BLK(addrb);
+ }
+
+ addr = BANK_ADDR_NEXT_BANK(addr);
+ nbanks++;
+ }
+
+out:
+ if (nbanks == 0)
+ panic("ERROR: no flash found at address 0x%08lx\n",
+ (unsigned long)base);
+}
+
+static void
+bank_reset(flash_info_t *info, int sect)
+{
+ bank_addr_t addrw, eaddrw;
+
+ addrw = (bank_addr_t)info->start[sect];
+ eaddrw = BANK_ADDR_NEXT_WORD(addrw);
+
+ while (addrw < eaddrw) {
+#ifdef FLASH_DEBUG
+ printf(" writing reset cmd to addr 0x%08lx\n",
+ (unsigned long)addrw);
+#endif
+ *addrw = BANK_CMD_RST;
+ addrw++;
+ }
+}
+
+static void
+bank_erase_init(flash_info_t *info, int sect)
+{
+ bank_addr_t addrw, saddrw, eaddrw;
+ int flag;
+
+#ifdef FLASH_DEBUG
+ printf("0x%08lx BANK_CMD_PROG\n", BANK_CMD_PROG);
+ printf("0x%08lx BANK_CMD_ERASE1\n", BANK_CMD_ERASE1);
+ printf("0x%08lx BANK_CMD_ERASE2\n", BANK_CMD_ERASE2);
+ printf("0x%08lx BANK_CMD_CLR_STAT\n", BANK_CMD_CLR_STAT);
+ printf("0x%08lx BANK_CMD_RST\n", BANK_CMD_RST);
+ printf("0x%08lx BANK_STAT_RDY\n", BANK_STAT_RDY);
+ printf("0x%08lx BANK_STAT_ERR\n", BANK_STAT_ERR);
+#endif
+
+ saddrw = (bank_addr_t)info->start[sect];
+ eaddrw = BANK_ADDR_NEXT_WORD(saddrw);
+
+#ifdef FLASH_DEBUG
+ printf("erasing sector %d, start addr = 0x%08lx "
+ "(bank next word addr = 0x%08lx)\n", sect,
+ (unsigned long)saddrw, (unsigned long)eaddrw);
+#endif
+
+ /* Disable intrs which might cause a timeout here */
+ flag = disable_interrupts();
+
+ for (addrw = saddrw; addrw < eaddrw; addrw++) {
+#ifdef FLASH_DEBUG
+ printf(" writing erase cmd to addr 0x%08lx\n",
+ (unsigned long)addrw);
+#endif
+ *addrw = BANK_CMD_ERASE1;
+ *addrw = BANK_CMD_ERASE2;
+ }
+
+ /* re-enable interrupts if necessary */
+ if (flag)
+ enable_interrupts();
+}
+
+static int
+bank_erase_poll(flash_info_t *info, int sect)
+{
+ bank_addr_t addrw, saddrw, eaddrw;
+ int sectdone, haderr;
+
+ saddrw = (bank_addr_t)info->start[sect];
+ eaddrw = BANK_ADDR_NEXT_WORD(saddrw);
+
+ sectdone = 1;
+ haderr = 0;
+
+ for (addrw = saddrw; addrw < eaddrw; addrw++) {
+ bank_word_t stat = *addrw;
+
+#ifdef FLASH_DEBUG
+ printf(" checking status at addr "
+ "0x%08lx [0x%08lx]\n",
+ (unsigned long)addrw, stat);
+#endif
+ if ((stat & BANK_STAT_RDY) != BANK_STAT_RDY)
+ sectdone = 0;
+ else if ((stat & BANK_STAT_ERR) != 0) {
+ printf(" failed on sector %d "
+ "(stat = 0x%08lx) at "
+ "address 0x%08lx\n",
+ sect, stat,
+ (unsigned long)addrw);
+ *addrw = BANK_CMD_CLR_STAT;
+ haderr = 1;
+ }
+ }
+
+ if (haderr)
+ return (-1);
+ else
+ return (sectdone);
+}
+
+static int
+bank_write_word(bank_addr_t addr, bank_word_t value)
+{
+ bank_word_t stat;
+ ulong start;
+ int flag, retval;
+
+ /* Disable interrupts which might cause a timeout here */
+ flag = disable_interrupts();
+
+ *addr = BANK_CMD_PROG;
+
+ *addr = value;
+
+ /* re-enable interrupts if necessary */
+ if (flag)
+ enable_interrupts();
+
+ retval = 0;
+
+ /* data polling for D7 */
+ start = get_timer (0);
+ do {
+ if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
+ retval = 1;
+ goto done;
+ }
+ stat = *addr;
+ } while ((stat & BANK_STAT_RDY) != BANK_STAT_RDY);
+
+ if ((stat & BANK_STAT_ERR) != 0) {
+ printf("flash program failed (stat = 0x%08lx) "
+ "at address 0x%08lx\n", (ulong)stat, (ulong)addr);
+ *addr = BANK_CMD_CLR_STAT;
+ retval = 3;
+ }
+
+done:
+ /* reset to read mode */
+ *addr = BANK_CMD_RST;
+
+ return (retval);
+}
+
+/*-----------------------------------------------------------------------
+ */
+
+unsigned long
+flash_init(void)
+{
+ int i;
+
+ /* Init: no FLASHes known */
+ for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) {
+ flash_info[i].flash_id = FLASH_UNKNOWN;
+ }
+
+ bank_probe(&flash_info[0], (bank_addr_t)CFG_FLASH_BASE);
+
+ /*
+ * protect monitor and environment sectors
+ */
+
+#if CFG_MONITOR_BASE == CFG_FLASH_BASE
+ (void)flash_protect(FLAG_PROTECT_SET,
+ CFG_MONITOR_BASE,
+ CFG_MONITOR_BASE+CFG_MONITOR_LEN-1,
+ &flash_info[0]);
+#endif
+
+#if defined(CFG_FLASH_ENV_ADDR)
+ (void)flash_protect(FLAG_PROTECT_SET,
+ CFG_FLASH_ENV_ADDR,
+#if defined(CFG_FLASH_ENV_BUF)
+ CFG_FLASH_ENV_ADDR + CFG_FLASH_ENV_BUF - 1,
+#else
+ CFG_FLASH_ENV_ADDR + CFG_FLASH_ENV_SIZE - 1,
+#endif
+ &flash_info[0]);
+#endif
+
+ return flash_info[0].size;
+}
+
+/*-----------------------------------------------------------------------
+ */
+#if 0
+static void
+flash_get_offsets(ulong base, flash_info_t *info)
+{
+ int i;
+
+ /* set up sector start adress table */
+ if (info->flash_id & FLASH_BTYPE) {
+ /* set sector offsets for bottom boot block type */
+ info->start[0] = base + 0x00000000;
+ info->start[1] = base + 0x00008000;
+ info->start[2] = base + 0x0000C000;
+ info->start[3] = base + 0x00010000;
+ for (i = 4; i < info->sector_count; i++) {
+ info->start[i] = base + (i * 0x00020000) - 0x00060000;
+ }
+ } else {
+ /* set sector offsets for top boot block type */
+ i = info->sector_count - 1;
+ info->start[i--] = base + info->size - 0x00008000;
+ info->start[i--] = base + info->size - 0x0000C000;
+ info->start[i--] = base + info->size - 0x00010000;
+ for (; i >= 0; i--) {
+ info->start[i] = base + i * 0x00020000;
+ }
+ }
+
+}
+#endif /* 0 */
+
+/*-----------------------------------------------------------------------
+ */
+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_INTEL: printf ("INTEL "); break;
+ default: printf ("Unknown Vendor "); break;
+ }
+
+ switch (info->flash_id & FLASH_TYPEMASK) {
+ case FLASH_28F320J5: printf ("28F320J5 (32 Mbit, 2 x 16bit)\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!
+ */
+#if 0
+static ulong
+flash_get_size(vu_long *addr, flash_info_t *info)
+{
+ short i;
+ ulong value;
+ ulong base = (ulong)addr;
+
+
+ /* Write auto select command: read Manufacturer ID */
+ addr[0x0555] = 0x00AA00AA;
+ addr[0x02AA] = 0x00550055;
+ addr[0x0555] = 0x00900090;
+
+ value = addr[0];
+
+ switch (value) {
+ 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;
+ info->sector_count = 0;
+ info->size = 0;
+ return (0); /* no or unknown flash */
+ }
+
+ value = addr[1]; /* device ID */
+
+ switch (value) {
+ case AMD_ID_LV400T:
+ info->flash_id += FLASH_AM400T;
+ info->sector_count = 11;
+ info->size = 0x00100000;
+ break; /* => 1 MB */
+
+ case AMD_ID_LV400B:
+ info->flash_id += FLASH_AM400B;
+ info->sector_count = 11;
+ info->size = 0x00100000;
+ break; /* => 1 MB */
+
+ case AMD_ID_LV800T:
+ info->flash_id += FLASH_AM800T;
+ info->sector_count = 19;
+ info->size = 0x00200000;
+ break; /* => 2 MB */
+
+ case AMD_ID_LV800B:
+ info->flash_id += FLASH_AM800B;
+ info->sector_count = 19;
+ info->size = 0x00200000;
+ break; /* => 2 MB */
+
+ case AMD_ID_LV160T:
+ info->flash_id += FLASH_AM160T;
+ info->sector_count = 35;
+ info->size = 0x00400000;
+ break; /* => 4 MB */
+
+ case AMD_ID_LV160B:
+ info->flash_id += FLASH_AM160B;
+ info->sector_count = 35;
+ info->size = 0x00400000;
+ break; /* => 4 MB */
+#if 0 /* enable when device IDs are available */
+ case AMD_ID_LV320T:
+ info->flash_id += FLASH_AM320T;
+ info->sector_count = 67;
+ info->size = 0x00800000;
+ break; /* => 8 MB */
+
+ case AMD_ID_LV320B:
+ info->flash_id += FLASH_AM320B;
+ info->sector_count = 67;
+ info->size = 0x00800000;
+ break; /* => 8 MB */
+#endif
+ default:
+ info->flash_id = FLASH_UNKNOWN;
+ return (0); /* => no or unknown flash */
+
+ }
+
+ /* set up sector start adress table */
+ if (info->flash_id & FLASH_BTYPE) {
+ /* set sector offsets for bottom boot block type */
+ info->start[0] = base + 0x00000000;
+ info->start[1] = base + 0x00008000;
+ info->start[2] = base + 0x0000C000;
+ info->start[3] = base + 0x00010000;
+ for (i = 4; i < info->sector_count; i++) {
+ info->start[i] = base + (i * 0x00020000) - 0x00060000;
+ }
+ } else {
+ /* set sector offsets for top boot block type */
+ i = info->sector_count - 1;
+ info->start[i--] = base + info->size - 0x00008000;
+ info->start[i--] = base + info->size - 0x0000C000;
+ info->start[i--] = base + info->size - 0x00010000;
+ for (; i >= 0; i--) {
+ info->start[i] = base + i * 0x00020000;
+ }
+ }
+
+ /* 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 long *)(info->start[i]);
+ info->protect[i] = addr[2] & 1;
+ }
+
+ /*
+ * Prevent writes to uninitialized FLASH.
+ */
+ if (info->flash_id != FLASH_UNKNOWN) {
+ addr = (volatile unsigned long *)info->start[0];
+
+ *addr = 0x00F000F0; /* reset bank */
+ }
+
+ return (info->size);
+}
+#endif /* 0 */
+
+
+/*-----------------------------------------------------------------------
+ */
+
+int
+flash_erase(flash_info_t *info, int s_first, int s_last)
+{
+ int prot, sect, haderr;
+ ulong start, now, last;
+ int rcode = 0;
+
+#ifdef FLASH_DEBUG
+ printf("\nflash_erase: erase %d sectors (%d to %d incl.) from\n"
+ " Bank # %d: ", s_last - s_first + 1, s_first, s_last,
+ (info - flash_info) + 1);
+ flash_print_info(info);
+#endif
+
+ 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;
+ }
+
+ prot = 0;
+ for (sect=s_first; sect<=s_last; ++sect) {
+ if (info->protect[sect]) {
+ prot++;
+ }
+ }
+
+ if (prot) {
+ printf("- Warning: %d protected sector%s will not be erased!\n",
+ prot, (prot > 1 ? "s" : ""));
+ }
+
+ start = get_timer (0);
+ last = 0;
+ haderr = 0;
+
+ for (sect = s_first; sect <= s_last; sect++) {
+ if (info->protect[sect] == 0) { /* not protected */
+ ulong estart;
+ int sectdone;
+
+ bank_erase_init(info, sect);
+
+ /* wait at least 80us - let's wait 1 ms */
+ udelay (1000);
+
+ estart = get_timer(start);
+
+ do {
+ now = get_timer(start);
+
+ if (now - estart > CFG_FLASH_ERASE_TOUT) {
+ printf ("Timeout (sect %d)\n", sect);
+ haderr = 1;
+ rcode = 1;
+ break;
+ }
+
+#ifndef FLASH_DEBUG
+ /* show that we're waiting */
+ if ((now - last) > 1000) { /* every second */
+ putc ('.');
+ last = now;
+ }
+#endif
+
+ sectdone = bank_erase_poll(info, sect);
+
+ if (sectdone < 0) {
+ haderr = 1;
+ rcode = 1;
+ break;
+ }
+
+ } while (!sectdone);
+
+ if (haderr)
+ break;
+ }
+ }
+
+ if (haderr > 0)
+ printf (" failed\n");
+ else
+ printf (" done\n");
+
+ /* reset to read mode */
+ for (sect = s_first; sect <= s_last; sect++) {
+ if (info->protect[sect] == 0) { /* not protected */
+ bank_reset(info, sect);
+ }
+ }
+ return rcode;
+}
+
+/*-----------------------------------------------------------------------
+ * 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)
+{
+ int retval;
+
+ /* Check if Flash is (sufficiently) erased */
+ if ((*(ulong *)dest & data) != data) {
+ return (2);
+ }
+
+ retval = bank_write_word((bank_addr_t)dest, (bank_word_t)data);
+
+ return (retval);
+}
+
+/*-----------------------------------------------------------------------
+ */
generated by cgit v1.1 at 2024-11-22 18:49:59 +0000