Initial revision
authorwdenk <wdenk>
Fri, 11 Oct 2002 11:25:54 +0000 (11:25 +0000)
committerwdenk <wdenk>
Fri, 11 Oct 2002 11:25:54 +0000 (11:25 +0000)
board/lwmon/flash.c [new file with mode: 0644]

diff --git a/board/lwmon/flash.c b/board/lwmon/flash.c
new file mode 100644 (file)
index 0000000..3d2a00f
--- /dev/null
@@ -0,0 +1,556 @@
+/*
+ * (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
+ */
+
+/* #define DEBUG */
+
+#include <common.h>
+#include <mpc8xx.h>
+
+#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
+
+/*---------------------------------------------------------------------*/
+
+flash_info_t   flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips        */
+
+/*-----------------------------------------------------------------------
+ * Functions
+ */
+static ulong flash_get_size (vu_long *addr, flash_info_t *info);
+static int write_data (flash_info_t *info, ulong dest, ulong 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, size_b1;
+       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 */
+
+       debug ("\n## Get flash bank 1 size @ 0x%08x\n",FLASH_BASE0_PRELIM);
+
+       size_b0 = flash_get_size((vu_long *)FLASH_BASE0_PRELIM, &flash_info[0]);
+
+       if (flash_info[0].flash_id == FLASH_UNKNOWN) {
+               printf ("## Unknown FLASH on Bank 0: "
+                       "ID 0x%lx, Size = 0x%08lx = %ld MB\n",
+                       flash_info[0].flash_id,
+                       size_b0, size_b0<<20);
+       }
+
+       debug ("## Get flash bank 2 size @ 0x%08x\n",FLASH_BASE1_PRELIM);
+
+       size_b1 = flash_get_size((vu_long *)FLASH_BASE1_PRELIM, &flash_info[1]);
+
+       debug ("## Prelim. Flash bank sizes: %08lx + 0x%08lx\n",size_b0,size_b1);
+
+       if (size_b1 > size_b0) {
+               printf ("## ERROR: "
+                       "Bank 1 (0x%08lx = %ld MB) > Bank 0 (0x%08lx = %ld MB)\n",
+                       size_b1, size_b1<<20,
+                       size_b0, size_b0<<20
+               );
+               flash_info[0].flash_id  = FLASH_UNKNOWN;
+               flash_info[1].flash_id  = FLASH_UNKNOWN;
+               flash_info[0].sector_count      = -1;
+               flash_info[1].sector_count      = -1;
+               flash_info[0].size              = 0;
+               flash_info[1].size              = 0;
+               return (0);
+       }
+
+       debug  ("## Before remap: "
+               "BR0: 0x%08x    OR0: 0x%08x    "
+               "BR1: 0x%08x    OR1: 0x%08x\n",
+               memctl->memc_br0, memctl->memc_or0,
+               memctl->memc_br1, memctl->memc_or1);
+
+       /* Remap FLASH according to real size */
+       memctl->memc_or0 = (-size_b0 & 0xFFFF8000) | CFG_OR_TIMING_FLASH |
+                               OR_CSNT_SAM | OR_ACS_DIV1;
+       memctl->memc_br0 = (CFG_FLASH_BASE & BR_BA_MSK) | BR_PS_32 | BR_V;
+
+       debug ("## BR0: 0x%08x    OR0: 0x%08x\n",
+               memctl->memc_br0, memctl->memc_or0);
+
+       /* Re-do sizing to get full correct info */
+       size_b0 = flash_get_size((vu_long *)CFG_FLASH_BASE, &flash_info[0]);
+
+       flash_get_offsets (CFG_FLASH_BASE, &flash_info[0]);
+
+       flash_info[0].size = size_b0;
+
+#if CFG_MONITOR_BASE >= CFG_FLASH_BASE
+       /* monitor protection ON by default */
+       flash_protect(FLAG_PROTECT_SET,
+                     CFG_MONITOR_BASE,
+                     CFG_MONITOR_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_SECT_SIZE-1,
+                     &flash_info[0]);
+#endif
+
+       if (size_b1) {
+               memctl->memc_or1 = (-size_b1 & 0xFFFF8000) | CFG_OR_TIMING_FLASH |
+                                       OR_CSNT_SAM | OR_ACS_DIV1;
+               memctl->memc_br1 = ((CFG_FLASH_BASE + size_b0) & BR_BA_MSK) |
+                                       BR_PS_32 | BR_V;
+
+               debug ("## BR1: 0x%08x    OR1: 0x%08x\n",
+                       memctl->memc_br1, memctl->memc_or1);
+
+               /* Re-do sizing to get full correct info */
+               size_b1 = flash_get_size((vu_long *)(CFG_FLASH_BASE + size_b0),
+                                         &flash_info[1]);
+
+               flash_info[1].size = size_b1;
+
+               flash_get_offsets (CFG_FLASH_BASE + size_b0, &flash_info[1]);
+
+#if CFG_MONITOR_BASE >= CFG_FLASH_BASE
+               /* monitor protection ON by default */
+               flash_protect(FLAG_PROTECT_SET,
+                             CFG_MONITOR_BASE,
+                             CFG_MONITOR_BASE+CFG_MONITOR_LEN-1,
+                             &flash_info[1]);
+#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_SECT_SIZE-1,
+                             &flash_info[1]);
+#endif
+       } else {
+               memctl->memc_br1 = 0;           /* invalidate bank */
+               memctl->memc_or1 = 0;           /* invalidate bank */
+
+               debug ("## DISABLE BR1: 0x%08x    OR1: 0x%08x\n",
+                       memctl->memc_br1, memctl->memc_or1);
+
+               flash_info[1].flash_id = FLASH_UNKNOWN;
+               flash_info[1].sector_count = -1;
+               flash_info[1].size = 0;
+       }
+
+       debug ("## Final Flash bank sizes: %08lx + 0x%08lx\n",size_b0,size_b1);
+
+       return (size_b0 + size_b1);
+}
+
+/*-----------------------------------------------------------------------
+ */
+static void flash_get_offsets (ulong base, flash_info_t *info)
+{
+       int i;
+
+       if (info->flash_id == FLASH_UNKNOWN) {
+               return;
+       }
+
+       switch (info->flash_id & FLASH_VENDMASK) {
+       case FLASH_MAN_INTEL:
+           for (i = 0; i < info->sector_count; i++) {
+               info->start[i] = base;
+               base += 0x00020000 * 2;         /* 128k * 2 chips per bank */
+           }
+           return;
+
+       default:
+           printf ("Don't know sector ofsets for flash type 0x%lx\n",
+               info->flash_id);
+           return;
+       }
+}
+
+/*-----------------------------------------------------------------------
+ */
+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_AMD:     printf ("AMD ");                break;
+       case FLASH_MAN_FUJ:     printf ("Fujitsu ");            break;
+       case FLASH_MAN_SST:     printf ("SST ");                break;
+       case FLASH_MAN_STM:     printf ("STM ");                break;
+       case FLASH_MAN_INTEL:   printf ("Intel ");              break;
+       case FLASH_MAN_MT:      printf ("MT ");                 break;
+       default:                printf ("Unknown Vendor ");     break;
+       }
+
+       switch (info->flash_id & FLASH_TYPEMASK) {
+       case FLASH_28F320J3A:   printf ("28F320J3A (32Mbit = 128K x 32)\n");
+                               break;
+       case FLASH_28F640J3A:   printf ("28F640J3A (64Mbit = 128K x 64)\n");
+                               break;
+       case FLASH_28F128J3A:   printf ("28F128J3A (128Mbit = 128K x 128)\n");
+                               break;
+       default:                printf ("Unknown Chip Type\n");
+                               break;
+       }
+
+       if (info->size >= (1 << 20)) {
+               i = 20;
+       } else {
+               i = 10;
+       }
+       printf ("  Size: %ld %cB in %d Sectors\n",
+               info->size >> i,
+               (i == 20) ? 'M' : 'k',
+               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 (vu_long *addr, flash_info_t *info)
+{
+       ulong value;
+
+       /* Read Manufacturer ID */
+       addr[0] = 0x00900090;
+       value = addr[0];
+
+       debug ("Manuf. ID @ 0x%08lx: 0x%08lx\n", (ulong)addr, value);
+
+       switch (value) {
+       case AMD_MANUFACT:
+               info->flash_id = FLASH_MAN_AMD;
+               break;
+       case FUJ_MANUFACT:
+               info->flash_id = FLASH_MAN_FUJ;
+               break;
+       case SST_MANUFACT:
+               info->flash_id = FLASH_MAN_SST;
+               break;
+       case STM_MANUFACT:
+               info->flash_id = FLASH_MAN_STM;
+               break;
+       case INTEL_MANUFACT:
+               info->flash_id = FLASH_MAN_INTEL;
+               break;
+       default:
+               info->flash_id = FLASH_UNKNOWN;
+               info->sector_count = 0;
+               info->size = 0;
+               addr[0] = 0x00FF00FF;           /* restore read mode */
+               return (0);                     /* no or unknown flash  */
+       }
+
+       value = addr[1];                        /* device ID            */
+
+       debug ("Device ID @ 0x%08lx: 0x%08lx\n", (ulong)(&addr[1]), value);
+
+       switch (value) {
+       case INTEL_ID_28F320J3A:
+               info->flash_id += FLASH_28F320J3A;
+               info->sector_count = 32;
+               info->size = 0x00400000 * 2;
+               break;                          /* =>  8 MB             */
+
+       case INTEL_ID_28F640J3A:
+               info->flash_id += FLASH_28F640J3A;
+               info->sector_count = 64;
+               info->size = 0x00800000 * 2;
+               break;                          /* => 16 MB             */
+
+       case INTEL_ID_28F128J3A:
+               info->flash_id += FLASH_28F128J3A;
+               info->sector_count = 128;
+               info->size = 0x01000000 * 2;
+               break;                          /* => 32 MB             */
+
+       default:
+               info->flash_id = FLASH_UNKNOWN;
+               addr[0] = 0x00FF00FF;           /* restore read mode */
+               return (0);                     /* => no or unknown flash */
+
+       }
+
+       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] = 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 start, now, last;
+
+       debug ("flash_erase: first: %d last: %d\n", s_first, s_last);
+
+       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_VENDMASK) != FLASH_MAN_INTEL) {
+               printf ("Can erase only Intel flash types - 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");
+       }
+
+       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 */
+                       vu_long *addr = (vu_long *)(info->start[sect]);
+                       unsigned long status;
+
+                       /* Disable interrupts which might cause a timeout here */
+                       flag = disable_interrupts();
+
+                       *addr = 0x00500050;     /* clear status register */
+                       *addr = 0x00200020;     /* erase setup */
+                       *addr = 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) & 0x00800080) != 0x00800080) {
+                               if ((now=get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
+                                       printf ("Timeout\n");
+                                       *addr = 0x00B000B0; /* suspend erase      */
+                                       *addr = 0x00FF00FF; /* reset to read mode */
+                                       return 1;
+                               }
+
+                               /* show that we're waiting */
+                               if ((now - last) > 1000) {      /* every second */
+                                       putc ('.');
+                                       last = now;
+                               }
+                       }
+
+                       *addr = 0x00FF00FF;     /* reset to read mode */
+               }
+       }
+       printf (" done\n");
+       return 0;
+}
+
+/*-----------------------------------------------------------------------
+ * Copy memory to flash, returns:
+ * 0 - OK
+ * 1 - write timeout
+ * 2 - Flash not erased
+ * 4 - Flash not identified
+ */
+
+#define        FLASH_WIDTH     4       /* flash bus width in bytes */
+
+int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
+{
+       ulong cp, wp, data;
+       int i, l, rc;
+
+       if (info->flash_id == FLASH_UNKNOWN) {
+               return 4;
+       }
+
+       wp = (addr & ~(FLASH_WIDTH-1)); /* get lower FLASH_WIDTH 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<FLASH_WIDTH && cnt>0; ++i) {
+                       data = (data << 8) | *src++;
+                       --cnt;
+                       ++cp;
+               }
+               for (; cnt==0 && i<FLASH_WIDTH; ++i, ++cp) {
+                       data = (data << 8) | (*(uchar *)cp);
+               }
+
+               if ((rc = write_data(info, wp, data)) != 0) {
+                       return (rc);
+               }
+               wp += FLASH_WIDTH;
+       }
+
+       /*
+        * handle FLASH_WIDTH aligned part
+        */
+       while (cnt >= FLASH_WIDTH) {
+               data = 0;
+               for (i=0; i<FLASH_WIDTH; ++i) {
+                       data = (data << 8) | *src++;
+               }
+               if ((rc = write_data(info, wp, data)) != 0) {
+                       return (rc);
+               }
+               wp  += FLASH_WIDTH;
+               cnt -= FLASH_WIDTH;
+       }
+
+       if (cnt == 0) {
+               return (0);
+       }
+
+       /*
+        * handle unaligned tail bytes
+        */
+       data = 0;
+       for (i=0, cp=wp; i<FLASH_WIDTH && cnt>0; ++i, ++cp) {
+               data = (data << 8) | *src++;
+               --cnt;
+       }
+       for (; i<FLASH_WIDTH; ++i, ++cp) {
+               data = (data << 8) | (*(uchar *)cp);
+       }
+
+       return (write_data(info, wp, data));
+}
+
+/*-----------------------------------------------------------------------
+ * Write a word to Flash, returns:
+ * 0 - OK
+ * 1 - write timeout
+ * 2 - Flash not erased
+ */
+static int write_data (flash_info_t *info, ulong dest, ulong data)
+{
+       vu_long *addr = (vu_long *)dest;
+       ulong status;
+       ulong start;
+       int flag;
+
+       /* Check if Flash is (sufficiently) erased */
+       if ((*addr & data) != data) {
+               return (2);
+       }
+       /* Disable interrupts which might cause a timeout here */
+       flag = disable_interrupts();
+
+       *addr = 0x00400040;             /* write setup */
+       *addr = data;
+
+       /* re-enable interrupts if necessary */
+       if (flag)
+               enable_interrupts();
+
+       start = get_timer (0);
+
+       while (((status = *addr) & 0x00800080) != 0x00800080) {
+               if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
+                       *addr = 0x00FF00FF;     /* restore read mode */
+                       return (1);
+               }
+       }
+
+       *addr = 0x00FF00FF;     /* restore read mode */
+
+       return (0);
+}
+
+/*-----------------------------------------------------------------------
+ */