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-rw-r--r--board/v37/flash.c559
1 files changed, 559 insertions, 0 deletions
diff --git a/board/v37/flash.c b/board/v37/flash.c
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--- /dev/null
+++ b/board/v37/flash.c
@@ -0,0 +1,559 @@
+/*
+ * (C) Copyright 2003
+ * 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
+ */
+
+/*
+ * Yoo. Jonghoon, IPone, yooth@ipone.co.kr
+ * PPCboot port on RPXlite board
+ *
+ * Some of flash control words are modified. (from 2x16bit device
+ * to 4x8bit device)
+ * RPXLite board I tested has only 4 AM29LV800BB devices. Other devices
+ * are not tested.
+ *
+ * (?) Does an RPXLite board which
+ * does not use AM29LV800 flash memory exist ?
+ * I don't know...
+ */
+
+#include <common.h>
+#include <mpc8xx.h>
+
+flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */
+
+/*-----------------------------------------------------------------------
+ * Functions
+ */
+static ulong flash_get_size ( short manu, short dev_id, flash_info_t *info);
+static int write_word (flash_info_t *info, ulong dest, ulong data);
+static void flash_get_offsets (ulong base, flash_info_t *info, int two_chips);
+static void flash_get_id_word( void *ptr, short *ptr_manuf, short *ptr_dev_id);
+static void flash_get_id_long( void *ptr, short *ptr_manuf, short *ptr_dev_id);
+
+/*-----------------------------------------------------------------------
+ */
+
+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;
+ short manu, dev_id;
+ int i;
+
+ /* Init: no FLASHes known */
+ for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) {
+ flash_info[i].flash_id = FLASH_UNKNOWN;
+ }
+
+ /* Do sizing to get full correct info */
+
+ flash_get_id_word((void*)CFG_FLASH_BASE0,&manu,&dev_id);
+
+ size_b0 = flash_get_size(manu, dev_id, &flash_info[0]);
+
+ flash_get_offsets (CFG_FLASH_BASE0, &flash_info[0],0);
+
+ memctl->memc_or0 = CFG_OR_TIMING_FLASH | (0 - size_b0);
+
+#if CFG_MONITOR_BASE >= CFG_FLASH_BASE0
+ /* monitor protection ON by default */
+ flash_protect(FLAG_PROTECT_SET,
+ CFG_MONITOR_BASE,
+ CFG_MONITOR_BASE+CFG_MONITOR_LEN-1,
+ &flash_info[0]);
+#endif
+
+ flash_get_id_long((void*)CFG_FLASH_BASE1,&manu,&dev_id);
+
+ size_b1 = 2 * flash_get_size(manu, dev_id, &flash_info[1]);
+
+ flash_get_offsets(CFG_FLASH_BASE1, &flash_info[1],1);
+
+ memctl->memc_or1 = CFG_OR_TIMING_FLASH | (0 - size_b1);
+
+ flash_info[0].size = size_b0;
+ flash_info[1].size = size_b1;
+
+ return (size_b0+size_b1);
+}
+
+/*-----------------------------------------------------------------------
+ */
+static void flash_get_offsets (ulong base, flash_info_t *info, int two_chips)
+{
+ int i, addr_shift;
+ vu_short *addr = (vu_short*)base;
+
+ addr[0x555] = 0x00AA ;
+ addr[0xAAA] = 0x0055 ;
+ addr[0x555] = 0x0090 ;
+
+ addr_shift = (two_chips ? 2 : 1 );
+
+ /* 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<<addr_shift);
+ info->start[1] = base + (0x00002000<<addr_shift);
+ info->start[2] = base + (0x00003000<<addr_shift);
+ info->start[3] = base + (0x00004000<<addr_shift);
+ for (i = 4; i < info->sector_count; i++) {
+ info->start[i] = base + ((i-3) * (0x00008000<<addr_shift)) ;
+ }
+ } else {
+ /* set sector offsets for top boot block type */
+ i = info->sector_count - 1;
+ info->start[i--] = base + info->size - (0x00002000<<addr_shift);
+ info->start[i--] = base + info->size - (0x00003000<<addr_shift);
+ info->start[i--] = base + info->size - (0x00004000<<addr_shift);
+ for (; i >= 0; i--) {
+ info->start[i] = base + i * (0x00008000<<addr_shift);
+ }
+ }
+
+ /* 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 = (vu_short *)(info->start[i]);
+ info->protect[i] = addr[1<<addr_shift] & 1 ;
+ }
+
+ addr = (vu_short *)info->start[0];
+ *addr = 0xF0F0; /* reset bank */
+}
+
+/*-----------------------------------------------------------------------
+ */
+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_TOSH: printf ("TOSHIBA "); 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");
+}
+
+/*-----------------------------------------------------------------------
+ */
+
+
+/*-----------------------------------------------------------------------
+ */
+
+/*
+ * The following code cannot be run from FLASH!
+ */
+
+static void flash_get_id_word( void *ptr, short *ptr_manuf, short *ptr_dev_id)
+{
+ vu_short *addr = (vu_short*)ptr;
+
+ addr[0x555] = 0x00AA ;
+ addr[0xAAA] = 0x0055 ;
+ addr[0x555] = 0x0090 ;
+
+ *ptr_manuf = addr[0];
+ *ptr_dev_id = addr[1];
+
+ addr[0] = 0xf0f0; /* return to normal */
+}
+
+static void flash_get_id_long( void *ptr, short *ptr_manuf, short *ptr_dev_id)
+{
+ vu_short *addr = (vu_short*)ptr;
+ vu_short *addr1, *addr2, *addr3;
+
+ addr1 = (vu_short*) ( ((int)ptr) + (0x5555<<2) );
+ addr2 = (vu_short*) ( ((int)ptr) + (0x2AAA<<2) );
+ addr3 = (vu_short*) ( ((int)ptr) + (0x5555<<2) );
+
+ *addr1 = 0xAAAA;
+ *addr2 = 0x5555;
+ *addr3 = 0x9090;
+
+ *ptr_manuf = addr[0];
+ *ptr_dev_id = addr[2];
+
+ addr[0] = 0xf0f0; /* return to normal */
+}
+
+static ulong flash_get_size ( short manu, short dev_id, flash_info_t *info)
+{
+ switch (manu) {
+ case ((short)AMD_MANUFACT):
+ info->flash_id = FLASH_MAN_AMD;
+ break;
+ case ((short)FUJ_MANUFACT):
+ info->flash_id = FLASH_MAN_FUJ;
+ break;
+ case ((short)TOSH_MANUFACT):
+ info->flash_id = FLASH_MAN_TOSH;
+ break;
+ default:
+ info->flash_id = FLASH_UNKNOWN;
+ info->sector_count = 0;
+ info->size = 0;
+ return (0); /* no or unknown flash */
+ }
+
+
+ switch (dev_id) {
+ case ((short)TOSH_ID_FVT160):
+ info->flash_id += FLASH_AM160T;
+ info->sector_count = 35;
+ info->size = 0x00200000;
+ break; /* => 1 MB */
+
+ case ((short)TOSH_ID_FVB160):
+ info->flash_id += FLASH_AM160B;
+ info->sector_count = 35;
+ info->size = 0x00200000;
+ break; /* => 1 MB */
+
+ case ((short)AMD_ID_LV400T):
+ info->flash_id += FLASH_AM400T;
+ info->sector_count = 11;
+ info->size = 0x00100000;
+ break; /* => 1 MB */
+
+ case ((short)AMD_ID_LV400B):
+ info->flash_id += FLASH_AM400B;
+ info->sector_count = 11;
+ info->size = 0x00100000;
+ break; /* => 1 MB */
+
+ case ((short)AMD_ID_LV800T):
+ info->flash_id += FLASH_AM800T;
+ info->sector_count = 19;
+ info->size = 0x00200000;
+ break; /* => 2 MB */
+
+ case ((short)AMD_ID_LV800B):
+ info->flash_id += FLASH_AM800B;
+ info->sector_count = 19;
+ info->size = 0x00400000; //%%% Size doubled by yooth
+ break; /* => 4 MB */
+
+ case ((short)AMD_ID_LV160T):
+ info->flash_id += FLASH_AM160T;
+ info->sector_count = 35;
+ info->size = 0x00200000;
+ break; /* => 4 MB */
+
+ case ((short)AMD_ID_LV160B):
+ info->flash_id += FLASH_AM160B;
+ info->sector_count = 35;
+ info->size = 0x00200000;
+ break; /* => 4 MB */
+ default:
+ info->flash_id = FLASH_UNKNOWN;
+ return (0); /* => no or unknown flash */
+
+ }
+
+ return(info->size);
+}
+
+
+/*-----------------------------------------------------------------------
+ */
+
+int flash_erase (flash_info_t *info, int s_first, int s_last)
+{
+ vu_short *addr = (vu_short*)(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[0x555] = (vu_short)0xAAAAAAAA;
+ addr[0xAAA] = (vu_short)0x55555555;
+ addr[0x555] = (vu_short)0x80808080;
+ addr[0x555] = (vu_short)0xAAAAAAAA;
+ addr[0xAAA] = (vu_short)0x55555555;
+
+ /* Start erase on unprotected sectors */
+ for (sect = s_first; sect<=s_last; sect++) {
+ if (info->protect[sect] == 0) { /* not protected */
+ addr = (vu_short *)(info->start[sect]) ;
+ addr[0] = (vu_short)0x30303030 ;
+ 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 = (vu_short *)(info->start[l_sect]);
+ while ((addr[0] & 0x8080) != 0x8080) {
+ 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 = (vu_short *)info->start[0];
+ addr[0] = (vu_short)0xF0F0F0F0; /* 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;
+ 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)
+{
+ vu_short *addr = (vu_short *)(info->start[0]);
+ vu_short sdata;
+
+ ulong start;
+ int flag;
+
+ /* Check if Flash is (sufficiently) erased */
+ if ((*((vu_long *)dest) & data) != data) {
+ return (2);
+ }
+
+ /* First write upper 16 bits */
+ sdata = (short)(data>>16);
+
+ /* Disable interrupts which might cause a timeout here */
+ flag = disable_interrupts();
+
+ addr[0x555] = 0xAAAA;
+ addr[0xAAA] = 0x5555;
+ addr[0x555] = 0xA0A0;
+
+ *((vu_short *)dest) = sdata;
+
+ /* re-enable interrupts if necessary */
+ if (flag)
+ enable_interrupts();
+
+ /* data polling for D7 */
+ start = get_timer (0);
+ while ((*((vu_short *)dest) & 0x8080) != (sdata & 0x8080)) {
+ if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
+ return (1);
+ }
+ }
+
+ /* Now write lower 16 bits */
+ sdata = (short)(data&0xffff);
+
+ /* Disable interrupts which might cause a timeout here */
+ flag = disable_interrupts();
+
+ addr[0x555] = 0xAAAA;
+ addr[0xAAA] = 0x5555;
+ addr[0x555] = 0xA0A0;
+
+ *((vu_short *)dest + 1) = sdata;
+
+ /* re-enable interrupts if necessary */
+ if (flag)
+ enable_interrupts();
+
+ /* data polling for D7 */
+ start = get_timer (0);
+ while ((*((vu_short *)dest + 1) & 0x8080) != (sdata & 0x8080)) {
+ if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
+ return (1);
+ }
+ }
+ return (0);
+}
+
+/*-----------------------------------------------------------------------
+ */
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