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-rw-r--r--board/LEOX/elpt860/flash.c615
1 files changed, 615 insertions, 0 deletions
diff --git a/board/LEOX/elpt860/flash.c b/board/LEOX/elpt860/flash.c
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+++ b/board/LEOX/elpt860/flash.c
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+/*
+**=====================================================================
+**
+** Copyright (C) 2000, 2001, 2002, 2003
+** The LEOX team <team@leox.org>, http://www.leox.org
+**
+** LEOX.org is about the development of free hardware and software resources
+** for system on chip.
+**
+** Description: U-Boot port on the LEOX's ELPT860 CPU board
+** ~~~~~~~~~~~
+**
+**=====================================================================
+**
+** 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
+**
+**=====================================================================
+*/
+
+/*
+** Note 1: In this file, you have to provide the following variable:
+** ------
+** flash_info_t flash_info[CFG_MAX_FLASH_BANKS]
+** 'flash_info_t' structure is defined into 'include/flash.h'
+** and defined as extern into 'common/cmd_flash.c'
+**
+** Note 2: In this file, you have to provide the following functions:
+** ------
+** unsigned long flash_init(void)
+** called from 'board_init_r()' into 'common/board.c'
+**
+** void flash_print_info(flash_info_t *info)
+** called from 'do_flinfo()' into 'common/cmd_flash.c'
+**
+** int flash_erase(flash_info_t *info,
+** int s_first,
+** int s_last)
+** called from 'do_flerase()' & 'flash_sect_erase()' into 'common/cmd_flash.c'
+**
+** int write_buff (flash_info_t *info,
+** uchar *src,
+** ulong addr,
+** ulong cnt)
+** called from 'flash_write()' into 'common/cmd_flash.c'
+*/
+
+#include <common.h>
+#include <mpc8xx.h>
+
+
+#ifndef CFG_ENV_ADDR
+# define CFG_ENV_ADDR (CFG_FLASH_BASE + CFG_ENV_OFFSET)
+#endif
+
+flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */
+
+/*-----------------------------------------------------------------------
+ * Internal Functions
+ */
+static void flash_get_offsets (ulong base, flash_info_t *info);
+static ulong flash_get_size (volatile unsigned char *addr, flash_info_t *info);
+
+static int write_word (flash_info_t *info, ulong dest, ulong data);
+static int write_byte (flash_info_t *info, ulong dest, uchar data);
+
+/*-----------------------------------------------------------------------
+ */
+
+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 ((volatile unsigned char *)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 & OR_AM_MSK);
+ memctl->memc_br0 = (CFG_FLASH_BASE & BR_BA_MSK) | BR_MS_GPCM | BR_PS_8 | BR_V;
+
+ /* Re-do sizing to get full correct info */
+ size_b0 = flash_get_size ((volatile unsigned char *)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 */
+ 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_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;
+
+#define SECTOR_64KB 0x00010000
+
+ /* set up sector start adress table */
+ for (i = 0; i < info->sector_count; i++)
+ {
+ info->start[i] = base + (i * SECTOR_64KB);
+ }
+}
+
+/*-----------------------------------------------------------------------
+ */
+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_STM: printf ("STM (Thomson) "); break;
+ default: printf ("Unknown Vendor "); break;
+ }
+
+ switch ( info->flash_id & FLASH_TYPEMASK )
+ {
+ case FLASH_AM040: printf ("AM29F040 (4 Mbits)\n");
+ break;
+ default: printf ("Unknown Chip Type\n");
+ break;
+ }
+
+ printf (" Size: %ld KB in %d Sectors\n",
+ info->size >> 10, 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 (volatile unsigned char *addr,
+ flash_info_t *info)
+{
+ short i;
+ uchar value;
+ ulong base = (ulong)addr;
+
+ /* Write auto select command: read Manufacturer ID */
+ addr[0x0555] = 0xAA;
+ addr[0x02AA] = 0x55;
+ addr[0x0555] = 0x90;
+
+ value = addr[0];
+
+ switch ( value )
+ {
+ /* case AMD_MANUFACT: */
+ case 0x01:
+ info->flash_id = FLASH_MAN_AMD;
+ break;
+ /* case FUJ_MANUFACT: */
+ case 0x04:
+ info->flash_id = FLASH_MAN_FUJ;
+ break;
+ /* case STM_MANUFACT: */
+ case 0x20:
+ info->flash_id = FLASH_MAN_STM;
+ break;
+
+ default:
+ info->flash_id = FLASH_UNKNOWN;
+ info->sector_count = 0;
+ info->size = 0;
+ return (0); /* no or unknown flash */
+ }
+
+ value = addr[1]; /* device ID */
+
+ switch ( value )
+ {
+ case STM_ID_F040B:
+ case AMD_ID_F040B:
+ info->flash_id += FLASH_AM040; /* 4 Mbits = 512k * 8 */
+ info->sector_count = 8;
+ info->size = 0x00080000;
+ break;
+
+ default:
+ info->flash_id = FLASH_UNKNOWN;
+ return (0); /* => no or unknown flash */
+ }
+
+ /* set up sector start adress table */
+ for (i = 0; i < info->sector_count; i++)
+ {
+ info->start[i] = base + (i * 0x00010000);
+ }
+
+ /* check for protected sectors */
+ for (i = 0; i < info->sector_count; i++)
+ {
+ /* read sector protection at sector address, (A7 .. A0) = 0x02 */
+ /* D0 = 1 if protected */
+ addr = (volatile unsigned char *)(info->start[i]);
+ info->protect[i] = addr[2] & 1;
+ }
+
+ /*
+ * Prevent writes to uninitialized FLASH.
+ */
+ if ( info->flash_id != FLASH_UNKNOWN )
+ {
+ addr = (volatile unsigned char *)info->start[0];
+
+ *addr = 0xF0; /* reset bank */
+ }
+
+ return (info->size);
+}
+
+
+/*-----------------------------------------------------------------------
+ */
+
+int
+flash_erase (flash_info_t *info,
+ int s_first,
+ int s_last)
+{
+ volatile unsigned char *addr = (volatile unsigned char *)(info->start[0]);
+ int flag, prot, sect, l_sect;
+ ulong start, now, 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_UNKNOWN) ||
+ (info->flash_id > FLASH_AMD_COMP) )
+ {
+ 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");
+ }
+
+ l_sect = -1;
+
+ /* Disable interrupts which might cause a timeout here */
+ flag = disable_interrupts();
+
+ addr[0x0555] = 0xAA;
+ addr[0x02AA] = 0x55;
+ addr[0x0555] = 0x80;
+ addr[0x0555] = 0xAA;
+ addr[0x02AA] = 0x55;
+
+ /* Start erase on unprotected sectors */
+ for (sect = s_first; sect<=s_last; sect++)
+ {
+ if (info->protect[sect] == 0) /* not protected */
+ {
+ addr = (volatile unsigned char *)(info->start[sect]);
+ addr[0] = 0x30;
+ 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 = (volatile unsigned char *)(info->start[l_sect]);
+ while ( (addr[0] & 0x80) != 0x80 )
+ {
+ 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 */
+ {
+ putc ('.');
+ last = now;
+ }
+ }
+
+DONE:
+ /* reset to read mode */
+ addr = (volatile unsigned char *)info->start[0];
+ addr[0] = 0xF0; /* 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;
+ uchar bdata;
+ int i, l, rc;
+
+ if ( (info->flash_id & FLASH_TYPEMASK) == FLASH_AM040 )
+ {
+ /* Width of the data bus: 8 bits */
+
+ wp = addr;
+
+ while ( cnt )
+ {
+ bdata = *src++;
+
+ if ( (rc = write_byte(info, wp, bdata)) != 0 )
+ {
+ return (rc);
+ }
+
+ ++wp;
+ --cnt;
+ }
+
+ return ( 0 );
+ }
+ else
+ {
+ /* Width of the data bus: 32 bits */
+
+ 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)
+{
+ vu_long *addr = (vu_long*)(info->start[0]);
+ ulong start;
+ int flag;
+
+ /* Check if Flash is (sufficiently) erased */
+ if ( (*((vu_long *)dest) & data) != data )
+ {
+ return (2);
+ }
+ /* Disable interrupts which might cause a timeout here */
+ flag = disable_interrupts();
+
+ addr[0x0555] = 0x00AA00AA;
+ addr[0x02AA] = 0x00550055;
+ addr[0x0555] = 0x00A000A0;
+
+ *((vu_long *)dest) = data;
+
+ /* re-enable interrupts if necessary */
+ if ( flag )
+ enable_interrupts();
+
+ /* data polling for D7 */
+ start = get_timer (0);
+ while ( (*((vu_long *)dest) & 0x00800080) != (data & 0x00800080) )
+ {
+ if ( get_timer(start) > CFG_FLASH_WRITE_TOUT )
+ {
+ return (1);
+ }
+ }
+
+ return (0);
+}
+
+/*-----------------------------------------------------------------------
+ * Write a byte to Flash, returns:
+ * 0 - OK
+ * 1 - write timeout
+ * 2 - Flash not erased
+ */
+static int
+write_byte (flash_info_t *info,
+ ulong dest,
+ uchar data)
+{
+ volatile unsigned char *addr = (volatile unsigned char *)(info->start[0]);
+ ulong start;
+ int flag;
+
+ /* Check if Flash is (sufficiently) erased */
+ if ( (*((volatile unsigned char *)dest) & data) != data )
+ {
+ return (2);
+ }
+ /* Disable interrupts which might cause a timeout here */
+ flag = disable_interrupts();
+
+ addr[0x0555] = 0xAA;
+ addr[0x02AA] = 0x55;
+ addr[0x0555] = 0xA0;
+
+ *((volatile unsigned char *)dest) = data;
+
+ /* re-enable interrupts if necessary */
+ if ( flag )
+ enable_interrupts();
+
+ /* data polling for D7 */
+ start = get_timer (0);
+ while ( (*((volatile unsigned char *)dest) & 0x80) != (data & 0x80) )
+ {
+ if ( get_timer(start) > CFG_FLASH_WRITE_TOUT )
+ {
+ return (1);
+ }
+ }
+
+ return (0);
+}
+
+/*-----------------------------------------------------------------------
+ */
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