Initial revision
authorwdenk <wdenk>
Wed, 18 Sep 2002 07:25:03 +0000 (07:25 +0000)
committerwdenk <wdenk>
Wed, 18 Sep 2002 07:25:03 +0000 (07:25 +0000)
board/r360mpi/flash.c [new file with mode: 0644]

diff --git a/board/r360mpi/flash.c b/board/r360mpi/flash.c
new file mode 100644 (file)
index 0000000..80bcd25
--- /dev/null
@@ -0,0 +1,478 @@
+/*
+ * (C) Copyright 2001
+ * Kyle Harris, Nexus Technologies, Inc. kharris@nexus-tech.net
+ *
+ * (C) Copyright 2001
+ * 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
+ */
+
+#include <common.h>
+#include <mpc8xx.h>
+
+flash_info_t   flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips        */
+
+#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
+
+/*-----------------------------------------------------------------------
+ * Protection Flags:
+ */
+#define FLAG_PROTECT_SET       0x01
+#define FLAG_PROTECT_CLEAR     0x02
+
+/* Board support for 1 or 2 flash devices */
+#undef FLASH_PORT_WIDTH32
+#define FLASH_PORT_WIDTH16
+
+#ifdef FLASH_PORT_WIDTH16
+#define FLASH_PORT_WIDTH               ushort
+#define FLASH_PORT_WIDTHV              vu_short
+#else
+#define FLASH_PORT_WIDTH               ulong
+#define FLASH_PORT_WIDTHV              vu_long
+#endif
+
+#define FPW            FLASH_PORT_WIDTH
+#define FPWV   FLASH_PORT_WIDTHV
+
+/*-----------------------------------------------------------------------
+ * Functions
+ */
+static ulong flash_get_size (FPW *addr, flash_info_t *info);
+static int   write_data (flash_info_t *info, ulong dest, FPW data);
+static void  flash_get_offsets (ulong base, flash_info_t *info);
+
+/*-----------------------------------------------------------------------
+ */
+
+unsigned long flash_init (void)
+{
+       volatile immap_t     *immap  = (immap_t *)CFG_IMMR;
+       volatile memctl8xx_t *memctl = &immap->im_memctl;
+       unsigned long size_b0;
+       int i;
+
+       /* Init: no FLASHes known */
+       for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) {
+               flash_info[i].flash_id = FLASH_UNKNOWN;
+       }
+
+       /* Static FLASH Bank configuration here - FIXME XXX */
+       size_b0 = flash_get_size((FPW *)FLASH_BASE0_PRELIM, &flash_info[0]);
+
+       if (flash_info[0].flash_id == FLASH_UNKNOWN) {
+               printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
+                       size_b0, size_b0<<20);
+       }
+
+       /* Remap FLASH according to real size */
+       memctl->memc_or0 = CFG_OR_TIMING_FLASH | (-size_b0 & 0xFFFF8000);
+       memctl->memc_br0 = (CFG_FLASH_BASE & BR_BA_MSK) | BR_PS_16 | BR_MS_GPCM | BR_V;
+
+       /* Re-do sizing to get full correct info */
+       size_b0 = flash_get_size((FPW *)CFG_FLASH_BASE, &flash_info[0]);
+
+       flash_get_offsets (CFG_FLASH_BASE, &flash_info[0]);
+
+#if CFG_MONITOR_BASE >= CFG_FLASH_BASE
+       /* monitor protection ON by default */
+       (void)flash_protect(FLAG_PROTECT_SET,
+                           CFG_FLASH_BASE,
+                           CFG_FLASH_BASE+CFG_MONITOR_LEN-1,
+                           &flash_info[0]);
+#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_SIZE-1,
+                     &flash_info[0]);
+#endif
+
+       flash_info[0].size = size_b0;
+
+       return (size_b0);
+}
+
+/*-----------------------------------------------------------------------
+ */
+static void flash_get_offsets (ulong base, flash_info_t *info)
+{
+       int i;
+
+       if (info->flash_id == FLASH_UNKNOWN) {
+               return;
+       }
+
+       if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) {
+               for (i = 0; i < info->sector_count; i++) {
+                       info->start[i] = base + (i * 0x00020000);
+               }
+       }
+}
+
+/*-----------------------------------------------------------------------
+ */
+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_28F320J3A:
+                               printf ("28F320J3A\n"); break;
+   case FLASH_28F640J3A:
+                               printf ("28F640J3A\n"); break;
+   case FLASH_28F128J3A:
+                               printf ("28F128J3A\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!
+ */
+
+static ulong flash_get_size (FPW *addr, flash_info_t *info)
+{
+       FPW value;
+
+       /* Write auto select command: read Manufacturer ID */
+       addr[0x5555] = (FPW)0x00AA00AA;
+       addr[0x2AAA] = (FPW)0x00550055;
+       addr[0x5555] = (FPW)0x00900090;
+
+       value = addr[0];
+
+   switch (value) {
+   case (FPW)INTEL_MANUFACT:
+      info->flash_id = FLASH_MAN_INTEL;
+      break;
+       default:
+               info->flash_id = FLASH_UNKNOWN;
+               info->sector_count = 0;
+               info->size = 0;
+               addr[0] = (FPW)0x00FF00FF;      /* restore read mode */
+               return (0);                     /* no or unknown flash  */
+       }
+
+       value = addr[1];                        /* device ID            */
+
+   switch (value) {
+   case (FPW)INTEL_ID_28F320J3A:
+      info->flash_id += FLASH_28F320J3A;
+      info->sector_count = 32;
+      info->size = 0x00400000;
+      break;            /* => 4 MB     */
+
+   case (FPW)INTEL_ID_28F640J3A:
+      info->flash_id += FLASH_28F640J3A;
+      info->sector_count = 64;
+      info->size = 0x00800000;
+      break;            /* => 8 MB     */
+
+   case (FPW)INTEL_ID_28F128J3A:
+      info->flash_id += FLASH_28F128J3A;
+      info->sector_count = 128;
+      info->size = 0x01000000;
+      break;            /* => 16 MB     */
+
+       default:
+               info->flash_id = FLASH_UNKNOWN;
+               break;
+       }
+
+       if (info->sector_count > CFG_MAX_FLASH_SECT) {
+               printf ("** ERROR: sector count %d > max (%d) **\n",
+                       info->sector_count, CFG_MAX_FLASH_SECT);
+               info->sector_count = CFG_MAX_FLASH_SECT;
+       }
+
+       addr[0] = (FPW)0x00FF00FF;      /* restore read mode */
+
+       return (info->size);
+}
+
+
+/*-----------------------------------------------------------------------
+ */
+
+int    flash_erase (flash_info_t *info, int s_first, int s_last)
+{
+       int flag, prot, sect;
+       ulong type, start, now, last;
+       int rcode = 0;
+
+       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;
+       }
+
+       type = (info->flash_id & FLASH_VENDMASK);
+       if ((type != FLASH_MAN_INTEL)) {
+               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");
+       }
+
+       start = get_timer (0);
+       last  = start;
+       /* Start erase on unprotected sectors */
+       for (sect = s_first; sect<=s_last; sect++) {
+               if (info->protect[sect] == 0) { /* not protected */
+                       FPWV *addr = (FPWV *)(info->start[sect]);
+                       FPW status;
+
+                       /* Disable interrupts which might cause a timeout here */
+                       flag = disable_interrupts();
+
+                       *addr = (FPW)0x00500050;        /* clear status register */
+                       *addr = (FPW)0x00200020;        /* erase setup */
+                       *addr = (FPW)0x00D000D0;        /* erase confirm */
+
+                       /* re-enable interrupts if necessary */
+                       if (flag)
+                               enable_interrupts();
+
+                       /* wait at least 80us - let's wait 1 ms */
+                       udelay (1000);
+
+                       while (((status = *addr) & (FPW)0x00800080) != (FPW)0x00800080) {
+                               if ((now=get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
+                                       printf ("Timeout\n");
+                                       *addr = (FPW)0x00B000B0; /* suspend erase         */
+                                       *addr = (FPW)0x00FF00FF; /* reset to read mode */
+                                       rcode = 1;
+                                       break;
+                               }
+
+                               /* show that we're waiting */
+                       if ((now - last) > 1000) {      /* every second */
+                                       putc ('.');
+                                       last = now;
+                               }
+                       }
+
+                       *addr = (FPW)0x00FF00FF;        /* reset to read mode */
+               }
+       }
+       printf (" done\n");
+       return rcode;
+}
+
+/*-----------------------------------------------------------------------
+ * Copy memory to flash, returns:
+ * 0 - OK
+ * 1 - write timeout
+ * 2 - Flash not erased
+ * 4 - Flash not identified
+ */
+
+int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
+{
+       ulong cp, wp;
+       FPW data;
+#if 0
+       int count, i, l, rc, port_width;
+#else
+       int i, l, rc, port_width;
+#endif
+
+       if (info->flash_id == FLASH_UNKNOWN) {
+               return 4;
+       }
+/* get lower word aligned address */
+#ifdef FLASH_PORT_WIDTH16
+       wp = (addr & ~1);
+       port_width = 2;
+#else
+       wp = (addr & ~3);
+       port_width = 4;
+#endif
+
+       /*
+        * 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<port_width && cnt>0; ++i) {
+                       data = (data << 8) | *src++;
+                       --cnt;
+                       ++cp;
+               }
+               for (; cnt==0 && i<port_width; ++i, ++cp) {
+                       data = (data << 8) | (*(uchar *)cp);
+               }
+
+               if ((rc = write_data(info, wp, data)) != 0) {
+                       return (rc);
+               }
+               wp += port_width;
+       }
+
+       /*
+        * handle word aligned part
+        */
+#if 0
+       count = 0;
+#endif
+       while (cnt >= port_width) {
+               data = 0;
+               for (i=0; i<port_width; ++i) {
+                       data = (data << 8) | *src++;
+               }
+               if ((rc = write_data(info, wp, data)) != 0) {
+                       return (rc);
+               }
+               wp  += port_width;
+               cnt -= port_width;
+#if 0
+               if (count++ > 0x20000)
+               {
+                       putc('.');
+                       count = 0;
+               }
+#endif
+       }
+
+       if (cnt == 0) {
+               return (0);
+       }
+
+       /*
+        * handle unaligned tail bytes
+        */
+       data = 0;
+       for (i=0, cp=wp; i<port_width && cnt>0; ++i, ++cp) {
+               data = (data << 8) | *src++;
+               --cnt;
+       }
+       for (; i<port_width; ++i, ++cp) {
+               data = (data << 8) | (*(uchar *)cp);
+       }
+
+       return (write_data(info, wp, data));
+}
+
+/*-----------------------------------------------------------------------
+ * Write a word or halfword to Flash, returns:
+ * 0 - OK
+ * 1 - write timeout
+ * 2 - Flash not erased
+ */
+static int write_data (flash_info_t *info, ulong dest, FPW data)
+{
+       FPWV *addr = (FPWV *)dest;
+       ulong status;
+       ulong start;
+       int flag;
+
+       /* Check if Flash is (sufficiently) erased */
+       if ((*addr & data) != data) {
+               printf("not erased at %08lx (%x)\n",(ulong)addr,*addr);
+               return (2);
+       }
+       /* Disable interrupts which might cause a timeout here */
+       flag = disable_interrupts();
+
+       *addr = (FPW)0x00400040;                /* write setup */
+       *addr = data;
+
+       /* re-enable interrupts if necessary */
+       if (flag)
+               enable_interrupts();
+
+       start = get_timer (0);
+
+       while (((status = *addr) & (FPW)0x00800080) != (FPW)0x00800080) {
+               if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
+                       *addr = (FPW)0x00FF00FF;        /* restore read mode */
+                       return (1);
+               }
+       }
+
+       *addr = (FPW)0x00FF00FF;        /* restore read mode */
+
+       return (0);
+}
+