Initial revision

1 files changed, 367 insertions, 0 deletions

diff --git a/board/cradle/flash.c b/board/cradle/flash.c
new file mode 100644
index 0000000..265b609
--- /dev/null
+++ b/board/cradle/flash.c
@@ -0,0 +1,367 @@
+/*
+ * (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 0x400000
+#define MAIN_SECT_SIZE  0x20000
+
+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;
+         case 1:
+                flashbase = PHYS_FLASH_2;
+                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_28F320J3A & FLASH_TYPEMASK):
+                printf("28F320J3A (32Mbit)\n");
+                break;
+         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 */
+          vu_short *addr = (vu_short *)(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)
+{
+   vu_short *addr = (vu_short *)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 = *((vu_short*)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);
+}