Initial revision

1 files changed, 364 insertions, 0 deletions

diff --git a/board/csb226/flash.c b/board/csb226/flash.c
new file mode 100644
index 0000000..0b95648
--- /dev/null
+++ b/board/csb226/flash.c
@@ -0,0 +1,364 @@
+/*
+ * (C) Copyright 2002
+ * Kyle Harris, Nexus Technologies, Inc. kharris@nexus-tech.net
+ *
+ * (C) Copyright 2002
+ * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
+ * Marius Groeger <mgroeger@sysgo.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>
+
+#define FLASH_BANK_SIZE 0x02000000
+#define MAIN_SECT_SIZE  0x40000         /* 2x16 = 256k per sector */
+
+flash_info_t    flash_info[CFG_MAX_FLASH_BANKS];
+
+
+/*-----------------------------------------------------------------------
+ */
+
+ulong flash_init(void)
+{
+    int i, j;
+    ulong size = 0;
+
+    for (i = 0; i < CFG_MAX_FLASH_BANKS; i++)
+    {
+	ulong flashbase = 0;
+	flash_info[i].flash_id =
+	  (INTEL_MANUFACT & FLASH_VENDMASK) |
+	  (INTEL_ID_28F128J3 & FLASH_TYPEMASK);
+	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);
+
+        switch (i)
+        {
+           case 0:
+	        flashbase = PHYS_FLASH_1;
+                break;
+           default:
+	        panic("configured to many flash banks!\n");
+                break;
+        }
+	for (j = 0; j < flash_info[i].sector_count; j++)
+	{
+	    flash_info[i].start[j] = flashbase + j*MAIN_SECT_SIZE;
+	}
+	size += flash_info[i].size;
+    }
+
+    /* Protect monitor and environment sectors
+     */
+    flash_protect(FLAG_PROTECT_SET,
+		  CFG_FLASH_BASE,
+		  CFG_FLASH_BASE + _armboot_end_data - _armboot_start,
+		  &flash_info[0]);
+
+    flash_protect(FLAG_PROTECT_SET,
+		  CFG_ENV_ADDR,
+		  CFG_ENV_ADDR + CFG_ENV_SIZE - 1,
+		  &flash_info[0]);
+
+    return size;
+}
+
+/*-----------------------------------------------------------------------
+ */
+void flash_print_info  (flash_info_t *info)
+{
+    int i, j;
+
+    for (j=0; j<CFG_MAX_FLASH_BANKS; j++)
+    {
+        switch (info->flash_id & FLASH_VENDMASK)
+        {
+        case (INTEL_MANUFACT & FLASH_VENDMASK):
+	        printf("Intel: ");
+	        break;
+        default:
+	        printf("Unknown Vendor ");
+	        break;
+        }
+
+        switch (info->flash_id & FLASH_TYPEMASK)
+        {
+        case (INTEL_ID_28F128J3 & FLASH_TYPEMASK):
+	        printf("28F128J3 (128Mbit)\n");
+	        break;
+        default:
+	        printf("Unknown Chip Type\n");
+	        goto Done;
+	        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");
+        info++;
+    }
+
+Done:
+}
+
+/*-----------------------------------------------------------------------
+ */
+
+int	flash_erase (flash_info_t *info, int s_first, int s_last)
+{
+    int flag, prot, sect;
+    int rc = ERR_OK;
+
+    if (info->flash_id == FLASH_UNKNOWN)
+	return ERR_UNKNOWN_FLASH_TYPE;
+
+    if ((s_first < 0) || (s_first > s_last)) {
+	return ERR_INVAL;
+    }
+
+    if ((info->flash_id & FLASH_VENDMASK) !=
+	(INTEL_MANUFACT & FLASH_VENDMASK)) {
+	return ERR_UNKNOWN_FLASH_VENDOR;
+    }
+
+    prot = 0;
+    for (sect=s_first; sect<=s_last; ++sect) {
+	if (info->protect[sect]) {
+	    prot++;
+	}
+    }
+    if (prot)
+	return ERR_PROTECTED;
+
+    /*
+     * Disable interrupts which might cause a timeout
+     * here. Remember that our exception vectors are
+     * at address 0 in the flash, and we don't want a
+     * (ticker) exception to happen while the flash
+     * chip is in programming mode.
+     */
+    flag = disable_interrupts();
+
+    /* Start erase on unprotected sectors */
+    for (sect = s_first; sect<=s_last && !ctrlc(); sect++) {
+
+	printf("Erasing sector %2d ... ", sect);
+
+	/* arm simple, non interrupt dependent timer */
+	reset_timer_masked();
+
+	if (info->protect[sect] == 0) {	/* not protected */
+	    /* vushort *addr = (vushort *)(info->start[sect]); */
+	    ushort *addr = (ushort *)(info->start[sect]);
+
+	    *addr = 0x20;	/* erase setup */
+	    *addr = 0xD0;	/* erase confirm */
+
+	    while ((*addr & 0x80) != 0x80) {
+		if (get_timer_masked() > CFG_FLASH_ERASE_TOUT) {
+		    *addr = 0xB0; /* suspend erase */
+		    *addr = 0xFF;	/* reset to read mode */
+		    rc = ERR_TIMOUT;
+		    goto outahere;
+		}
+	    }
+
+	    /* clear status register command */
+	    *addr = 0x50;
+	    /* reset to read mode */
+	    *addr = 0xFF;
+	}
+	printf("ok.\n");
+    }
+    if (ctrlc())
+      printf("User Interrupt!\n");
+
+outahere:
+
+    /* allow flash to settle - wait 10 ms */
+    udelay_masked(10000);
+
+    if (flag)
+      enable_interrupts();
+
+    return rc;
+}
+
+/*-----------------------------------------------------------------------
+ * Copy memory to flash
+ */
+
+static int write_word (flash_info_t *info, ulong dest, ushort data)
+{
+    /* vushort *addr = (vushort *)dest, val; */
+    ushort *addr = (ushort *)dest, val;
+    int rc = ERR_OK;
+    int flag;
+
+    /* Check if Flash is (sufficiently) erased
+     */
+    if ((*addr & data) != data)
+        return ERR_NOT_ERASED;
+
+    /*
+     * Disable interrupts which might cause a timeout
+     * here. Remember that our exception vectors are
+     * at address 0 in the flash, and we don't want a
+     * (ticker) exception to happen while the flash
+     * chip is in programming mode.
+     */
+    flag = disable_interrupts();
+
+    /* clear status register command */
+    *addr = 0x50;
+
+    /* program set-up command */
+    *addr = 0x40;
+
+    /* latch address/data */
+    *addr = data;
+
+    /* arm simple, non interrupt dependent timer */
+    reset_timer_masked();
+
+    /* wait while polling the status register */
+    while(((val = *addr) & 0x80) != 0x80)
+    {
+	if (get_timer_masked() > CFG_FLASH_WRITE_TOUT) {
+	    rc = ERR_TIMOUT;
+	    /* suspend program command */
+	    *addr = 0xB0;
+	    goto outahere;
+	}
+    }
+
+    if(val & 0x1A) {	/* check for error */
+        printf("\nFlash write error %02x at address %08lx\n",
+    	   (int)val, (unsigned long)dest);
+        if(val & (1<<3)) {
+	    printf("Voltage range error.\n");
+	    rc = ERR_PROG_ERROR;
+	    goto outahere;
+        }
+        if(val & (1<<1)) {
+	    printf("Device protect error.\n");
+	    rc = ERR_PROTECTED;
+	    goto outahere;
+        }
+        if(val & (1<<4)) {
+	    printf("Programming error.\n");
+	    rc = ERR_PROG_ERROR;
+	    goto outahere;
+        }
+        rc = ERR_PROG_ERROR;
+        goto outahere;
+    }
+
+outahere:
+    /* read array command */
+    *addr = 0xFF;
+
+    if (flag)
+      enable_interrupts();
+
+    return rc;
+}
+
+/*-----------------------------------------------------------------------
+ * Copy memory to flash.
+ */
+
+int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
+{
+    ulong cp, wp;
+    ushort data;
+    int l;
+    int i, rc;
+
+    wp = (addr & ~1);	/* 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 << 8);
+	}
+	for (; i<2 && cnt>0; ++i) {
+	    data = (data >> 8) | (*src++ << 8);
+	    --cnt;
+	    ++cp;
+	}
+	for (; cnt==0 && i<2; ++i, ++cp) {
+	    data = (data >> 8) | (*(uchar *)cp << 8);
+	}
+
+	if ((rc = write_word(info, wp, data)) != 0) {
+	    return (rc);
+	}
+	wp += 2;
+    }
+
+    /*
+     * handle word aligned part
+     */
+    while (cnt >= 2) {
+	/* data = *((vushort*)src); */
+	data = *((ushort*)src);
+	if ((rc = write_word(info, wp, data)) != 0) {
+	    return (rc);
+	}
+	src += 2;
+	wp  += 2;
+	cnt -= 2;
+    }
+
+    if (cnt == 0) {
+	return ERR_OK;
+    }
+
+    /*
+     * handle unaligned tail bytes
+     */
+    data = 0;
+    for (i=0, cp=wp; i<2 && cnt>0; ++i, ++cp) {
+	data = (data >> 8) | (*src++ << 8);
+	--cnt;
+    }
+    for (; i<2; ++i, ++cp) {
+	data = (data >> 8) | (*(uchar *)cp << 8);
+    }
+
+    return write_word(info, wp, data);
+}