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-rw-r--r--board/svm_sc8xx/flash.c801
1 files changed, 801 insertions, 0 deletions
diff --git a/board/svm_sc8xx/flash.c b/board/svm_sc8xx/flash.c
new file mode 100644
index 0000000000..8c0e229130
--- /dev/null
+++ b/board/svm_sc8xx/flash.c
@@ -0,0 +1,801 @@
+/*
+ * (C) Copyright 2000
+ * 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>
+
+#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 */
+
+/*-----------------------------------------------------------------------
+ * Functions
+ */
+static int write_word (flash_info_t *info, ulong dest, ulong data);
+#if 0
+static ulong flash_get_size (vu_long *addr, flash_info_t *info);
+static void flash_get_offsets (ulong base, flash_info_t *info);
+#endif
+#ifdef CONFIG_BOOT_8B
+static int my_in_8( unsigned char *addr);
+static void my_out_8( unsigned char *addr, int val);
+#endif
+#ifdef CONFIG_BOOT_16B
+static int my_in_be16( unsigned short *addr);
+static void my_out_be16( unsigned short *addr, int val);
+#endif
+#ifdef CONFIG_BOOT_32B
+static unsigned my_in_be32( unsigned *addr);
+static void my_out_be32( unsigned *addr, int val);
+#endif
+/*-----------------------------------------------------------------------
+ */
+
+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;
+
+ size_b0=0;
+ size_b1=0;
+ /* Init: no FLASHes known */
+ for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) {
+ flash_info[i].flash_id = FLASH_UNKNOWN;
+ }
+#ifdef CFG_DOC_BASE
+#ifndef CONFIG_FEL8xx_AT
+ memctl->memc_or5 = (0xffff8000 | CFG_OR_TIMING_DOC ); /* 32k bytes */
+ memctl->memc_br5 = CFG_DOC_BASE | 0x401;
+#else
+ memctl->memc_or3 = (0xffff8000 | CFG_OR_TIMING_DOC ); /* 32k bytes */
+ memctl->memc_br3 = CFG_DOC_BASE | 0x401;
+#endif
+#endif
+#if defined( CONFIG_BOOT_8B)
+// memctl->memc_or0 = 0xfff80ff4; /* 4MB bytes */
+// memctl->memc_br0 = 0x40000401;
+ size_b0 = 0x80000; /* 512 K */
+ flash_info[0].flash_id = FLASH_MAN_AMD | FLASH_AM040;
+ flash_info[0].sector_count = 8;
+ flash_info[0].size = 0x00080000;
+ /* set up sector start address table */
+ for (i = 0; i < flash_info[0].sector_count; i++)
+ flash_info[0].start[i] = 0x40000000 + (i * 0x10000);
+ /* protect all sectors */
+ for (i = 0; i < flash_info[0].sector_count; i++)
+ flash_info[0].protect[i] = 0x1;
+#elif defined (CONFIG_BOOT_16B)
+// memctl->memc_or0 = 0xfff80ff4; /* 4MB bytes */
+// memctl->memc_br0 = 0x40000401;
+ size_b0 = 0x400000; /* 4MB , assume AMD29LV320B */
+ flash_info[0].flash_id = FLASH_MAN_AMD | FLASH_AM320B;
+ flash_info[0].sector_count = 67;
+ flash_info[0].size = 0x00400000;
+ /* set up sector start address table */
+ flash_info[0].start[0] = 0x40000000 ;
+ flash_info[0].start[1] = 0x40000000 + 0x4000;
+ flash_info[0].start[2] = 0x40000000 + 0x6000;
+ flash_info[0].start[3] = 0x40000000 + 0x8000;
+ for (i = 4; i < flash_info[0].sector_count; i++)
+ flash_info[0].start[i] = 0x40000000 + 0x10000 + ((i-4) * 0x10000);
+ /* protect all sectors */
+ for (i = 0; i < flash_info[0].sector_count; i++)
+ flash_info[0].protect[i] = 0x1;
+#endif
+
+
+#ifdef CONFIG_BOOT_32B
+
+ /* Static FLASH Bank configuration here - FIXME XXX */
+
+ 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 - Size = 0x%08lx = %ld MB\n",
+ size_b0, size_b0<<20);
+ }
+
+ size_b1 = flash_get_size((vu_long *)FLASH_BASE1_PRELIM, &flash_info[1]);
+
+ 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);
+ }
+
+ /* 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_V;
+
+ /* 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]);
+
+#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
+
+ if (size_b1) {
+ memctl->memc_or1 = CFG_OR_TIMING_FLASH | (-size_b1 & 0xFFFF8000);
+ memctl->memc_br1 = ((CFG_FLASH_BASE + size_b0) & BR_BA_MSK) |
+ BR_MS_GPCM | BR_V;
+
+ /* Re-do sizing to get full correct info */
+ size_b1 = flash_get_size((vu_long *)(CFG_FLASH_BASE + size_b0),
+ &flash_info[1]);
+
+ 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_SIZE-1,
+ &flash_info[1]);
+#endif
+ } else {
+ memctl->memc_br1 = 0; /* invalidate bank */
+
+ flash_info[1].flash_id = FLASH_UNKNOWN;
+ flash_info[1].sector_count = -1;
+ }
+
+ flash_info[0].size = size_b0;
+ flash_info[1].size = size_b1;
+
+
+#endif /* CONFIG_BOOT_32B */
+
+ return (size_b0 + size_b1);
+}
+#if 0
+/*-----------------------------------------------------------------------
+ */
+static void flash_get_offsets (ulong base, flash_info_t *info)
+{
+ int i;
+
+ /* set up sector start address table */
+ if (info->flash_id & FLASH_BTYPE) {
+ /* set sector offsets for bottom boot block type */
+ info->start[0] = base + 0x00000000;
+ info->start[1] = base + 0x00008000;
+ info->start[2] = base + 0x0000C000;
+ info->start[3] = base + 0x00010000;
+ for (i = 4; i < info->sector_count; i++) {
+ info->start[i] = base + (i * 0x00020000) - 0x00060000;
+ }
+ } else {
+ /* set sector offsets for top boot block type */
+ i = info->sector_count - 1;
+ info->start[i--] = base + info->size - 0x00008000;
+ info->start[i--] = base + info->size - 0x0000C000;
+ info->start[i--] = base + info->size - 0x00010000;
+ for (; i >= 0; i--) {
+ info->start[i] = base + i * 0x00020000;
+ }
+ }
+}
+#endif
+/*-----------------------------------------------------------------------
+ */
+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;
+ default: printf ("Unknown Vendor "); break;
+ }
+
+ switch (info->flash_id & FLASH_TYPEMASK) {
+ case FLASH_AM400B: printf ("AM29LV400B (4 Mbit, bottom boot sect)\n");
+ break;
+ case FLASH_AM400T: printf ("AM29LV400T (4 Mbit, top boot sector)\n");
+ break;
+ case FLASH_AM800B: printf ("AM29LV800B (8 Mbit, bottom boot sect)\n");
+ break;
+ case FLASH_AM800T: printf ("AM29LV800T (8 Mbit, top boot sector)\n");
+ break;
+ case FLASH_AM160B: printf ("AM29LV160B (16 Mbit, bottom boot sect)\n");
+ break;
+ case FLASH_AM160T: printf ("AM29LV160T (16 Mbit, top boot sector)\n");
+ break;
+ case FLASH_AM320B: printf ("AM29LV320B (32 Mbit, bottom boot sect)\n");
+ break;
+ case FLASH_AM320T: printf ("AM29LV320T (32 Mbit, top boot sector)\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!
+ */
+#if 0
+static ulong flash_get_size (vu_long *addr, flash_info_t *info)
+{
+ short i;
+ ulong value;
+ ulong base = (ulong)addr;
+
+ /* Write auto select command: read Manufacturer ID */
+ addr[0x0555] = 0x00AA00AA;
+ addr[0x02AA] = 0x00550055;
+ addr[0x0555] = 0x00900090;
+
+ value = addr[0];
+
+ switch (value) {
+ case AMD_MANUFACT:
+ info->flash_id = FLASH_MAN_AMD;
+ break;
+ case FUJ_MANUFACT:
+ info->flash_id = FLASH_MAN_FUJ;
+ 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 AMD_ID_LV400T:
+ info->flash_id += FLASH_AM400T;
+ info->sector_count = 11;
+ info->size = 0x00100000;
+ break; /* => 1 MB */
+
+ case AMD_ID_LV400B:
+ info->flash_id += FLASH_AM400B;
+ info->sector_count = 11;
+ info->size = 0x00100000;
+ break; /* => 1 MB */
+
+ case AMD_ID_LV800T:
+ info->flash_id += FLASH_AM800T;
+ info->sector_count = 19;
+ info->size = 0x00200000;
+ break; /* => 2 MB */
+
+ case AMD_ID_LV800B:
+ info->flash_id += FLASH_AM800B;
+ info->sector_count = 19;
+ info->size = 0x00200000;
+ break; /* => 2 MB */
+
+ case AMD_ID_LV160T:
+ info->flash_id += FLASH_AM160T;
+ info->sector_count = 35;
+ info->size = 0x00400000;
+ break; /* => 4 MB */
+
+ case AMD_ID_LV160B:
+ info->flash_id += FLASH_AM160B;
+ info->sector_count = 35;
+ info->size = 0x00400000;
+ break; /* => 4 MB */
+#if 0 /* enable when device IDs are available */
+ case AMD_ID_LV320T:
+ info->flash_id += FLASH_AM320T;
+ info->sector_count = 67;
+ info->size = 0x00800000;
+ break; /* => 8 MB */
+
+ case AMD_ID_LV320B:
+ info->flash_id += FLASH_AM320B;
+ info->sector_count = 67;
+ info->size = 0x00800000;
+ break; /* => 8 MB */
+#endif
+ default:
+ info->flash_id = FLASH_UNKNOWN;
+ return (0); /* => no or unknown flash */
+ }
+
+ /* set up sector start address table */
+ if (info->flash_id & FLASH_BTYPE) {
+ /* set sector offsets for bottom boot block type */
+ info->start[0] = base + 0x00000000;
+ info->start[1] = base + 0x00008000;
+ info->start[2] = base + 0x0000C000;
+ info->start[3] = base + 0x00010000;
+ for (i = 4; i < info->sector_count; i++) {
+ info->start[i] = base + (i * 0x00020000) - 0x00060000;
+ }
+ } else {
+ /* set sector offsets for top boot block type */
+ i = info->sector_count - 1;
+ info->start[i--] = base + info->size - 0x00008000;
+ info->start[i--] = base + info->size - 0x0000C000;
+ info->start[i--] = base + info->size - 0x00010000;
+ for (; i >= 0; i--) {
+ info->start[i] = base + i * 0x00020000;
+ }
+ }
+
+ /* 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 long *)(info->start[i]);
+ info->protect[i] = addr[2] & 1;
+ }
+
+ /*
+ * Prevent writes to uninitialized FLASH.
+ */
+ if (info->flash_id != FLASH_UNKNOWN) {
+ addr = (volatile unsigned long *)info->start[0];
+
+ *addr = 0x00F000F0; /* reset bank */
+ }
+
+ return (info->size);
+}
+#endif
+
+/*-----------------------------------------------------------------------
+ */
+
+int flash_erase (flash_info_t *info, int s_first, int s_last)
+{
+ vu_long *addr = (vu_long*)(info->start[0]);
+ int flag, prot, sect, l_sect,in_mid,in_did;
+ 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();
+#if defined (CONFIG_BOOT_8B )
+ my_out_8( (unsigned char * ) ((ulong)addr+0x555) , 0xaa );
+ my_out_8( (unsigned char * ) ((ulong)addr+0x2aa) , 0x55 );
+ my_out_8( (unsigned char * ) ((ulong)addr+0x555) , 0x90 );
+ in_mid=my_in_8( (unsigned char * ) addr );
+ in_did=my_in_8( (unsigned char * ) ((ulong)addr+1) );
+ printf(" man ID=0x%x, dev ID=0x%x.\n",in_mid,in_did );
+ my_out_8( (unsigned char *)addr, 0xf0);
+ udelay(1);
+ my_out_8( (unsigned char *) ((ulong)addr+0x555),0xaa );
+ my_out_8( (unsigned char *) ((ulong)addr+0x2aa),0x55 );
+ my_out_8( (unsigned char *) ((ulong)addr+0x555),0x80 );
+ my_out_8( (unsigned char *) ((ulong)addr+0x555),0xaa );
+ my_out_8( (unsigned char *) ((ulong)addr+0x2aa),0x55 );
+ /* Start erase on unprotected sectors */
+ for (sect = s_first; sect<=s_last; sect++) {
+ if (info->protect[sect] == 0) { /* not protected */
+ addr = (vu_long*)(info->start[sect]);
+ //addr[0] = 0x00300030;
+ my_out_8( (unsigned char *) ((ulong)addr),0x30 );
+ l_sect = sect;
+ }
+ }
+#elif defined(CONFIG_BOOT_16B )
+ my_out_be16( (unsigned short * ) ((ulong)addr+ (0xaaa)) , 0xaa );
+ my_out_be16( (unsigned short * ) ((ulong)addr+ (0x554)) , 0x55 );
+ my_out_be16( (unsigned short * ) ((ulong)addr+ (0xaaa)) , 0x90 );
+ in_mid=my_in_be16( (unsigned short * ) addr );
+ in_did=my_in_be16 ( (unsigned short * ) ((ulong)addr+2) );
+ printf(" man ID=0x%x, dev ID=0x%x.\n",in_mid,in_did );
+ my_out_be16( (unsigned short *)addr, 0xf0);
+ udelay(1);
+ my_out_be16( (unsigned short *) ((ulong)addr+ 0xaaa),0xaa );
+ my_out_be16( (unsigned short *) ((ulong)addr+0x554),0x55 );
+ my_out_be16( (unsigned short *) ((ulong)addr+0xaaa),0x80 );
+ my_out_be16( (unsigned short *) ((ulong)addr+0xaaa),0xaa );
+ my_out_be16( (unsigned short *) ((ulong)addr+0x554),0x55 );
+ /* Start erase on unprotected sectors */
+ for (sect = s_first; sect<=s_last; sect++) {
+ if (info->protect[sect] == 0) { /* not protected */
+ addr = (vu_long*)(info->start[sect]);
+ my_out_be16( (unsigned short *) ((ulong)addr),0x30 );
+ l_sect = sect;
+ }
+ }
+
+#elif defined(CONFIG_BOOT_32B)
+ my_out_be32( (unsigned * ) ((ulong)addr+0x1554) , 0xaa );
+ my_out_be32( (unsigned * ) ((ulong)addr+0xaa8) , 0x55 );
+ my_out_be32( (unsigned *) ((ulong)addr+0x1554) , 0x90 );
+ in_mid=my_in_be32( (unsigned * ) addr );
+ in_did=my_in_be32( (unsigned * ) ((ulong)addr+4) );
+ printf(" man ID=0x%x, dev ID=0x%x.\n",in_mid,in_did );
+ my_out_be32( (unsigned *)addr, 0xf0);
+ udelay(1);
+ my_out_be32( (unsigned *) ((ulong)addr+0x1554),0xaa );
+ my_out_be32( (unsigned *) ((ulong)addr+0xaa8),0x55 );
+ my_out_be32( (unsigned *) ((ulong)addr+0x1554),0x80 );
+ my_out_be32( (unsigned *) ((ulong)addr+0x1554),0xaa );
+ my_out_be32( (unsigned *) ((ulong)addr+0xaa8),0x55 );
+ /* Start erase on unprotected sectors */
+ for (sect = s_first; sect<=s_last; sect++) {
+ if (info->protect[sect] == 0) { /* not protected */
+ addr = (vu_long*)(info->start[sect]);
+ my_out_be32( (unsigned *) ((ulong)addr),0x00300030 );
+ l_sect = sect;
+ }
+ }
+
+#else
+# error CONFIG_BOOT_(size)B missing.
+#endif
+ /* 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 = (vu_long*)(info->start[l_sect]);
+#if defined (CONFIG_BOOT_8B)
+ while ( (my_in_8((unsigned char *)addr) & 0x80) != 0x80 )
+#elif defined(CONFIG_BOOT_16B )
+ while ( (my_in_be16((unsigned short *)addr) & 0x0080) != 0x0080 )
+#elif defined(CONFIG_BOOT_32B)
+ while ( (my_in_be32((unsigned *)addr) & 0x00800080) != 0x00800080 )
+#else
+# error CONFIG_BOOT_(size)B missing.
+#endif
+ {
+ 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 long *)info->start[0];
+#if defined (CONFIG_BOOT_8B)
+ my_out_8( (unsigned char *)addr, 0xf0);
+#elif defined(CONFIG_BOOT_16B )
+ my_out_be16( (unsigned short * ) addr , 0x00f0 );
+#elif defined(CONFIG_BOOT_32B)
+ my_out_be32 ( (unsigned *)addr, 0x00F000F0 ); /* reset bank */
+#else
+# error CONFIG_BOOT_(size)B missing.
+#endif
+ 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;
+ int i, l, rc;
+
+ 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)
+{
+ ulong addr = (ulong)(info->start[0]);
+ ulong start,last;
+ int flag;
+ ulong i;
+ int data_short[2];
+
+ /* Check if Flash is (sufficiently) erased */
+ if ( ((ulong) *(ulong *)dest & data) != data ) {
+ return (2);
+ }
+ /* Disable interrupts which might cause a timeout here */
+ flag = disable_interrupts();
+#if defined(CONFIG_BOOT_8B)
+#ifdef DEBUG
+ {
+ int in_mid,in_did;
+ my_out_8( (unsigned char * ) (addr+0x555) , 0xaa );
+ my_out_8( (unsigned char * ) (addr+0x2aa) , 0x55 );
+ my_out_8( (unsigned char * ) (addr+0x555) , 0x90 );
+ in_mid=my_in_8( (unsigned char * ) addr );
+ in_did=my_in_8( (unsigned char * ) (addr+1) );
+ printf(" man ID=0x%x, dev ID=0x%x.\n",in_mid,in_did );
+ my_out_8( (unsigned char *)addr, 0xf0);
+ udelay(1);
+ }
+#endif
+ {
+ int data_ch[4];
+ data_ch[0]=(int ) ((data>>24) & 0xff);
+ data_ch[1]=(int ) ((data>>16) &0xff );
+ data_ch[2]=(int ) ((data >>8) & 0xff);
+ data_ch[3]=(int ) (data & 0xff);
+ for (i=0;i<4;i++ ){
+ my_out_8( (unsigned char *) (addr+0x555),0xaa);
+ my_out_8((unsigned char *) (addr+0x2aa),0x55);
+ my_out_8( (unsigned char *) (addr+0x555),0xa0);
+ my_out_8((unsigned char *) (dest+i) ,data_ch[i]);
+ /* re-enable interrupts if necessary */
+ if (flag)
+ enable_interrupts();
+
+ start = get_timer (0);
+ last = start;
+ while( ( my_in_8((unsigned char *) (dest+i)) ) != ( data_ch[i] ) ) {
+ if (get_timer(start) > CFG_FLASH_WRITE_TOUT ) {
+ return 1;
+ }
+ }
+ }/* for */
+ }
+#elif defined( CONFIG_BOOT_16B)
+ data_short[0]=(int) (data>>16) & 0xffff;
+ data_short[1]=(int ) data & 0xffff ;
+ for (i=0;i<2;i++ ){
+ my_out_be16( (unsigned short *) ((ulong)addr+ 0xaaa),0xaa );
+ my_out_be16( (unsigned short *) ((ulong)addr+ 0x554),0x55 );
+ my_out_be16( (unsigned short *) ((ulong)addr+ 0xaaa),0xa0 );
+ my_out_be16( (unsigned short *) (dest+(i*2)) ,data_short[i]);
+ /* re-enable interrupts if necessary */
+ if (flag)
+ enable_interrupts();
+ start = get_timer (0);
+ last = start;
+ while( ( my_in_be16((unsigned short *) (dest+(i*2))) ) != ( data_short[i] ) ) {
+ if (get_timer(start) > CFG_FLASH_WRITE_TOUT ) {
+ return 1;
+ }
+ }
+ }
+#elif defined( CONFIG_BOOT_32B)
+ 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);
+ }
+ }
+#endif
+
+
+ return (0);
+}
+#ifdef CONFIG_BOOT_8B
+static int my_in_8 ( unsigned char *addr)
+{
+ int ret;
+ __asm__ __volatile__("lbz%U1%X1 %0,%1; eieio" : "=r" (ret) : "m" (*addr));
+ return ret;
+}
+
+static void my_out_8 ( unsigned char *addr, int val)
+{
+ __asm__ __volatile__("stb%U0%X0 %1,%0; eieio" : "=m" (*addr) : "r" (val));
+}
+#endif
+#ifdef CONFIG_BOOT_16B
+static int my_in_be16( unsigned short *addr)
+{
+ int ret;
+ __asm__ __volatile__("lhz%U1%X1 %0,%1; eieio" : "=r" (ret) : "m" (*addr));
+ return ret;
+}
+static void my_out_be16( unsigned short *addr, int val)
+{
+ __asm__ __volatile__("sth%U0%X0 %1,%0; eieio" : "=m" (*addr) : "r" (val));
+}
+#endif
+#ifdef CONFIG_BOOT_32B
+static unsigned my_in_be32( unsigned *addr)
+{
+ unsigned ret;
+ __asm__ __volatile__("lwz%U1%X1 %0,%1; eieio" : "=r" (ret) : "m" (*addr));
+ return ret;
+}
+static void my_out_be32( unsigned *addr, int val)
+{
+ __asm__ __volatile__("stw%U0%X0 %1,%0; eieio" : "=m" (*addr) : "r" (val));
+}
+#endif
+
+
+
generated by cgit (git 2.34.1) at 2024-12-24 13:50:49 +0000