Initial revision

1 files changed, 491 insertions, 0 deletions

diff --git a/board/utx8245/flash.c b/board/utx8245/flash.c
new file mode 100644
index 0000000..947fbc3
--- /dev/null
+++ b/board/utx8245/flash.c
@@ -0,0 +1,491 @@
+/*
+ * (C) Copyright 2001
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * (C) Copyright 2002
+ * Gregory E. Allen, gallen@arlut.utexas.edu
+ * Matthew E. Karger, karger@arlut.utexas.edu
+ * Applied Research Laboratories, The University of Texas at Austin
+ *
+ * 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 <mpc824x.h>
+#include <asm/processor.h>
+
+#define ROM_CS0_START	0xFF800000
+#define ROM_CS1_START	0xFF000000
+
+#if defined(CFG_ENV_IS_IN_FLASH)
+# 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
+# ifndef  CFG_ENV_SECT_SIZE
+#  define CFG_ENV_SECT_SIZE  CFG_ENV_SIZE
+# endif
+#endif
+
+#define	FLASH_BANK_SIZE	0x200000
+#define	MAIN_SECT_SIZE 	0x10000
+#define	SECT_SIZE_32KB	0x8000
+#define	SECT_SIZE_8KB	0x2000
+
+flash_info_t    flash_info[CFG_MAX_FLASH_BANKS];
+
+static int write_word (flash_info_t *info, ulong dest, ulong data);
+
+static __inline__ unsigned long get_msr(void)
+{	unsigned long msr;
+	__asm__ __volatile__ ("mfmsr %0" : "=r" (msr) :);
+    return msr;
+}
+
+static __inline__ void set_msr(unsigned long msr)
+{
+    __asm__ __volatile__ ("mtmsr %0" : : "r" (msr));
+}
+
+/*flash command address offsets*/
+#define ADDR0		(0x555)
+#define ADDR1		(0xAAA)
+#define ADDR3		(0x001)
+
+#define FLASH_WORD_SIZE unsigned char
+
+/*---------------------------------------------------------------------*/
+/*#define	DEBUG_FLASH	1 */
+
+/*---------------------------------------------------------------------*/
+
+unsigned long flash_init(void)
+{
+    int i, j;
+    ulong size = 0;
+	unsigned char manuf_id, device_id;
+
+    for (i = 0; i < CFG_MAX_FLASH_BANKS; i++)
+	{
+    	vu_char *addr = (vu_char *)(CFG_FLASH_BASE + i * FLASH_BANK_SIZE);
+
+	addr[0x555] = 0xAA;			/* 3 cycles to read device info.  See */
+	addr[0x2AA] = 0x55;			/* AM29LV116D datasheet for list of */
+	addr[0x555] = 0x90;			/* available commands. */
+
+	manuf_id = addr[0];
+	device_id = addr[1];
+
+#if defined DEBUG_FLASH
+	printf("manuf_id = %x, device_id = %x\n", manuf_id, device_id);
+#endif
+
+		if (  (manuf_id == (uchar)(AMD_MANUFACT)) &&
+	    	( device_id == AMD_ID_LV116DT))
+		{
+	    	flash_info[i].flash_id = ((FLASH_MAN_AMD & FLASH_VENDMASK) << 16) |
+	    			     (AMD_ID_LV116DT & FLASH_TYPEMASK);
+		} else {
+	    	flash_info[i].flash_id = FLASH_UNKNOWN;
+	    	addr[0] = (long)0xFFFFFFFF;
+	    	goto Done;
+		}
+
+#if defined DEBUG_FLASH
+		printf ("flash_id = 0x%08lX\n", flash_info[i].flash_id);
+#endif
+
+		addr[0] = (long)0xFFFFFFFF;
+
+		flash_info[i].size = FLASH_BANK_SIZE;
+		flash_info[i].sector_count = CFG_MAX_FLASH_SECT;
+		memset(flash_info[i].protect, 0, CFG_MAX_FLASH_SECT);
+
+		for (j = 0; j < flash_info[i].sector_count; j++)
+		{
+
+			if (j < (CFG_MAX_FLASH_SECT - 3) )
+
+				flash_info[i].start[j] = CFG_FLASH_BASE + i * FLASH_BANK_SIZE +
+			                       			j * MAIN_SECT_SIZE;
+
+			else if (j == (CFG_MAX_FLASH_SECT - 3) )
+
+				flash_info[i].start[j] =  flash_info[i].start[j-1] + SECT_SIZE_32KB;
+
+
+			else
+
+				flash_info[i].start[j] =  flash_info[i].start[j-1] + SECT_SIZE_8KB;
+
+		}
+
+	size += flash_info[i].size;
+    }
+
+    /* Protect monitor and environment sectors
+     */
+#if CFG_MONITOR_BASE >= CFG_FLASH_BASE
+     flash_protect(FLAG_PROTECT_SET, CFG_MONITOR_BASE,
+              CFG_MONITOR_BASE + CFG_MONITOR_LEN - 1, &flash_info[0]);
+#endif
+
+#if (CFG_ENV_IS_IN_FLASH == 1) && defined(CFG_ENV_ADDR)
+    flash_protect(FLAG_PROTECT_SET, CFG_ENV_ADDR,
+					CFG_ENV_ADDR + CFG_ENV_SIZE - 1, &flash_info[0]);
+#endif
+
+Done:
+    return size;
+}
+
+/*-----------------------------------------------------------------------
+ */
+void flash_print_info(flash_info_t *info)
+{
+  static const char unk[] = "Unknown";
+  const char *mfct = unk, *type = unk;
+  unsigned int i;
+
+  if(info->flash_id != FLASH_UNKNOWN)
+  {
+    switch(info->flash_id & FLASH_VENDMASK)
+    {
+      case FLASH_MAN_AMD:	mfct = "AMD";				break;
+      case FLASH_MAN_FUJ:	mfct = "FUJITSU";			break;
+      case FLASH_MAN_STM:	mfct = "STM";				break;
+      case FLASH_MAN_SST:	mfct = "SST";				break;
+      case FLASH_MAN_BM:	mfct = "Bright Microelectonics";	break;
+      case FLASH_MAN_INTEL:	mfct = "Intel";				break;
+    }
+
+    switch(info->flash_id & FLASH_TYPEMASK)
+    {
+      case FLASH_AM040:		type = "AM29F040B (512K * 8, uniform sector size)";	break;
+      case FLASH_AM400B:	type = "AM29LV400B (4 Mbit, bottom boot sect)";		break;
+      case FLASH_AM400T:	type = "AM29LV400T (4 Mbit, top boot sector)";		break;
+      case FLASH_AM800B:	type = "AM29LV800B (8 Mbit, bottom boot sect)";		break;
+      case FLASH_AM800T:	type = "AM29LV800T (8 Mbit, top boot sector)";		break;
+      case FLASH_AM160T:	type = "AM29LV160T (16 Mbit, top boot sector)";		break;
+      case FLASH_AM320B:	type = "AM29LV320B (32 Mbit, bottom boot sect)";	break;
+      case FLASH_AM320T:	type = "AM29LV320T (32 Mbit, top boot sector)";		break;
+      case FLASH_STM800AB:	type = "M29W800AB (8 Mbit, bottom boot sect)";		break;
+      case FLASH_SST800A:	type = "SST39LF/VF800 (8 Mbit, uniform sector size)";	break;
+      case FLASH_SST160A:	type = "SST39LF/VF160 (16 Mbit, uniform sector size)";	break;
+    }
+  }
+
+  printf(
+    "\n  Brand: %s Type: %s\n"
+    "  Size: %lu KB in %d Sectors\n",
+    mfct,
+    type,
+    info->size >> 10,
+    info->sector_count
+  );
+
+  printf ("  Sector Start Addresses:");
+
+  for (i = 0; i < info->sector_count; i++)
+  {
+    unsigned long size;
+    unsigned int erased;
+    unsigned long * flash = (unsigned long *) info->start[i];
+
+    /*
+     * Check if whole sector is erased
+     */
+    size =
+      (i != (info->sector_count - 1)) ?
+      (info->start[i + 1] - info->start[i]) >> 2 :
+      (info->start[0] + info->size - info->start[i]) >> 2;
+
+    for(
+      flash = (unsigned long *) info->start[i], erased = 1;
+      (flash != (unsigned long *) info->start[i] + size) && erased;
+      flash++
+    )
+      erased = *flash == ~0x0UL;
+
+    printf(
+      "%s %08lX %s %s",
+      (i % 5) ? "" : "\n   ",
+      info->start[i],
+      erased ? "E" : " ",
+      info->protect[i] ? "RO" : "  "
+    );
+  }
+
+  puts("\n");
+  return;
+}
+
+/*-----------------------------------------------------------------------
+ */
+
+int	flash_erase (flash_info_t *info, int s_first, int s_last)
+{
+	volatile FLASH_WORD_SIZE *addr = (FLASH_WORD_SIZE *)(info->start[0]);
+    int flag, prot, sect, l_sect;
+    ulong start, now, last;
+    unsigned char sh8b;
+
+    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_MAN_STM | FLASH_AMD_COMP))) {
+        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;
+
+    /* Check the ROM CS */
+    if ((info->start[0] >= ROM_CS1_START) && (info->start[0] < ROM_CS0_START))
+      sh8b = 3;
+    else
+      sh8b = 0;
+
+	/* Disable interrupts which might cause a timeout here */
+    flag = disable_interrupts();
+
+    addr[ADDR0 << sh8b] = (FLASH_WORD_SIZE)0x00AA00AA;
+    addr[ADDR1 << sh8b] = (FLASH_WORD_SIZE)0x00550055;
+    addr[ADDR0 << sh8b] = (FLASH_WORD_SIZE)0x00800080;
+    addr[ADDR0 << sh8b] = (FLASH_WORD_SIZE)0x00AA00AA;
+    addr[ADDR1 << sh8b] = (FLASH_WORD_SIZE)0x00550055;
+
+    /* Start erase on unprotected sectors */
+    for (sect = s_first; sect<=s_last; sect++)
+	{
+        if (info->protect[sect] == 0)
+		{ /* not protected */
+            addr = (FLASH_WORD_SIZE *)(info->start[0] + (
+				(info->start[sect] - info->start[0]) << sh8b));
+
+			if (info->flash_id & FLASH_MAN_SST)
+			{
+				addr[ADDR0 << sh8b] = (FLASH_WORD_SIZE)0x00AA00AA;
+				addr[ADDR1 << sh8b] = (FLASH_WORD_SIZE)0x00550055;
+ 				addr[ADDR0 << sh8b] = (FLASH_WORD_SIZE)0x00800080;
+				addr[ADDR0 << sh8b] = (FLASH_WORD_SIZE)0x00AA00AA;
+				addr[ADDR1 << sh8b] = (FLASH_WORD_SIZE)0x00550055;
+				addr[0] = (FLASH_WORD_SIZE)0x00500050;  /* block erase */
+				udelay(30000);  /* wait 30 ms */
+			}
+
+			else
+				addr[0] = (FLASH_WORD_SIZE)0x00300030;  /* sector erase */
+
+			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 = (FLASH_WORD_SIZE *)(info->start[0] + (
+			(info->start[l_sect] - info->start[0]) << sh8b));
+    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 */
+            serial_putc ('.');
+            last = now;
+        }
+    }
+
+DONE:
+    /* 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;
+
+    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 FLASH_WORD_SIZE *addr2 = (FLASH_WORD_SIZE *)info->start[0];
+	volatile FLASH_WORD_SIZE *dest2;
+	volatile FLASH_WORD_SIZE *data2 = (FLASH_WORD_SIZE *)&data;
+	ulong start;
+	int flag;
+	int i;
+	unsigned char sh8b;
+
+    /* Check the ROM CS */
+    if ((info->start[0] >= ROM_CS1_START) && (info->start[0] < ROM_CS0_START))
+      sh8b = 3;
+    else
+      sh8b = 0;
+
+    dest2 = (FLASH_WORD_SIZE *)(((dest - info->start[0]) << sh8b) +
+				info->start[0]);
+
+    /* Check if Flash is (sufficiently) erased */
+    if ((*dest2 & (FLASH_WORD_SIZE)data) != (FLASH_WORD_SIZE)data) {
+        return (2);
+    }
+    /* Disable interrupts which might cause a timeout here */
+    flag = disable_interrupts();
+
+        for (i=0; i<4/sizeof(FLASH_WORD_SIZE); i++)
+          {
+            addr2[ADDR0 << sh8b] = (FLASH_WORD_SIZE)0x00AA00AA;
+            addr2[ADDR1 << sh8b] = (FLASH_WORD_SIZE)0x00550055;
+            addr2[ADDR0 << sh8b] = (FLASH_WORD_SIZE)0x00A000A0;
+
+            dest2[i << sh8b] = data2[i];
+
+            /* re-enable interrupts if necessary */
+            if (flag)
+              enable_interrupts();
+
+            /* data polling for D7 */
+            start = get_timer (0);
+            while ((dest2[i << sh8b] & (FLASH_WORD_SIZE)0x00800080) !=
+                   (data2[i] & (FLASH_WORD_SIZE)0x00800080)) {
+              if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
+                return (1);
+              }
+            }
+          }
+
+    return (0);
+}
+/*-----------------------------------------------------------------------
+ */