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-rwxr-xr-xboard/cmc_pu2/flash.c468
1 files changed, 468 insertions, 0 deletions
diff --git a/board/cmc_pu2/flash.c b/board/cmc_pu2/flash.c
new file mode 100755
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+++ b/board/cmc_pu2/flash.c
@@ -0,0 +1,468 @@
+/*
+ * (C) Copyright 2003-2004
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * (C) Copyright 2004
+ * Martin Krause, TQ-Systems GmbH, martin.krause@tqs.de
+ *
+ * Modified for the CMC PU2 by (C) Copyright 2004 Gary Jennejohn
+ * garyj@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>
+
+#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 */
+
+#define FLASH_CYCLE1 0x0555
+#define FLASH_CYCLE2 0x02AA
+
+/*-----------------------------------------------------------------------
+ * Functions
+ */
+static ulong flash_get_size(vu_short *addr, flash_info_t *info);
+static void flash_reset(flash_info_t *info);
+static int write_word_amd(flash_info_t *info, vu_short *dest, ushort data);
+static flash_info_t *flash_get_info(ulong base);
+
+/*-----------------------------------------------------------------------
+ * flash_init()
+ *
+ * sets up flash_info and returns size of FLASH (bytes)
+ */
+unsigned long flash_init (void)
+{
+ unsigned long size = 0;
+ ulong flashbase = CFG_FLASH_BASE;
+
+ /* Init: no FLASHes known */
+ memset(&flash_info[0], 0, sizeof(flash_info_t));
+
+ flash_info[0].size = flash_get_size((vu_short *)flashbase, &flash_info[0]);
+
+ size = flash_info[0].size;
+
+#if CFG_MONITOR_BASE >= CFG_FLASH_BASE
+ /* monitor protection ON by default */
+ flash_protect(FLAG_PROTECT_SET,
+ CFG_MONITOR_BASE,
+ CFG_MONITOR_BASE+monitor_flash_len-1,
+ flash_get_info(CFG_MONITOR_BASE));
+#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_get_info(CFG_ENV_ADDR));
+#endif
+
+ return size ? size : 1;
+}
+
+/*-----------------------------------------------------------------------
+ */
+static void flash_reset(flash_info_t *info)
+{
+ vu_short *base = (vu_short *)(info->start[0]);
+
+ /* Put FLASH back in read mode */
+ if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL)
+ *base = 0x00FF; /* Intel Read Mode */
+ else if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_AMD)
+ *base = 0x00F0; /* AMD Read Mode */
+}
+
+/*-----------------------------------------------------------------------
+ */
+
+static flash_info_t *flash_get_info(ulong base)
+{
+ int i;
+ flash_info_t * info;
+
+ info = NULL;
+ for (i = 0; i < CFG_MAX_FLASH_BANKS; i ++) {
+ info = & flash_info[i];
+ if (info->size && info->start[0] <= base &&
+ base <= info->start[0] + info->size - 1)
+ break;
+ }
+
+ return i == CFG_MAX_FLASH_BANKS ? 0 : info;
+}
+
+/*-----------------------------------------------------------------------
+ */
+
+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_BM: printf ("BRIGHT MICRO "); 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;
+ default: printf ("Unknown Vendor "); break;
+ }
+
+ switch (info->flash_id & FLASH_TYPEMASK) {
+ case FLASH_S29GL064M:
+ printf ("S29GL064M-R6 (64Mbit, uniform sector size)\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!
+ */
+
+ulong flash_get_size (vu_short *addr, flash_info_t *info)
+{
+ int i;
+ ushort value;
+ ulong base = (ulong)addr;
+
+ /* Write auto select command sequence */
+ addr[FLASH_CYCLE1] = 0x00AA; /* for AMD, Intel ignores this */
+ addr[FLASH_CYCLE2] = 0x0055; /* for AMD, Intel ignores this */
+ addr[FLASH_CYCLE1] = 0x0090; /* selects Intel or AMD */
+
+ /* read Manufacturer ID */
+ udelay(100);
+ value = addr[0];
+ debug ("Manufacturer ID: %04X\n", value);
+
+ switch (value) {
+
+ case (AMD_MANUFACT & 0xFFFF):
+ debug ("Manufacturer: AMD (Spansion)\n");
+ info->flash_id = FLASH_MAN_AMD;
+ break;
+
+ case (INTEL_MANUFACT & 0xFFFF):
+ debug ("Manufacturer: Intel (not supported yet)\n");
+ info->flash_id = FLASH_MAN_INTEL;
+ break;
+
+ default:
+ printf ("Unknown Manufacturer ID: %04X\n", value);
+ info->flash_id = FLASH_UNKNOWN;
+ info->sector_count = 0;
+ info->size = 0;
+ goto out;
+ }
+
+ value = addr[1];
+ debug ("Device ID: %04X\n", value);
+
+ switch (addr[1]) {
+
+ case (AMD_ID_MIRROR & 0xFFFF):
+ debug ("Mirror Bit flash: addr[14] = %08X addr[15] = %08X\n",
+ addr[14], addr[15]);
+
+ switch(addr[14]) {
+ case (AMD_ID_GL064M_2 & 0xFFFF):
+ if (addr[15] != (AMD_ID_GL064M_3 & 0xffff)) {
+ printf ("Chip: S29GLxxxM -> unknown\n");
+ info->flash_id = FLASH_UNKNOWN;
+ info->sector_count = 0;
+ info->size = 0;
+ } else {
+ debug ("Chip: S29GL064M-R6\n");
+ info->flash_id += FLASH_S29GL064M;
+ info->sector_count = 128;
+ info->size = 0x00800000;
+ for (i = 0; i < info->sector_count; i++) {
+ info->start[i] = base;
+ base += 0x10000;
+ }
+ }
+ break; /* => 16 MB */
+ default:
+ printf ("Chip: *** unknown ***\n");
+ info->flash_id = FLASH_UNKNOWN;
+ info->sector_count = 0;
+ info->size = 0;
+ break;
+ }
+ break;
+
+ default:
+ printf ("Unknown Device ID: %04X\n", value);
+ info->flash_id = FLASH_UNKNOWN;
+ info->sector_count = 0;
+ info->size = 0;
+ break;
+ }
+
+out:
+ /* Put FLASH back in read mode */
+ flash_reset(info);
+
+ 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, ssect, l_sect;
+ ulong 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_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");
+ }
+
+ /* Disable interrupts which might cause a timeout here */
+ flag = disable_interrupts();
+
+ /*
+ * Start erase on unprotected sectors.
+ * Since the flash can erase multiple sectors with one command
+ * we take advantage of that by doing the erase in chunks of
+ * 3 sectors.
+ */
+ for (sect = s_first; sect <= s_last; ) {
+ l_sect = -1;
+
+ addr[FLASH_CYCLE1] = 0x00AA;
+ addr[FLASH_CYCLE2] = 0x0055;
+ addr[FLASH_CYCLE1] = 0x0080;
+ addr[FLASH_CYCLE1] = 0x00AA;
+ addr[FLASH_CYCLE2] = 0x0055;
+
+ /* do the erase in chunks of at most 3 sectors */
+ for (ssect = 0; ssect < 3; ssect++) {
+ if ((sect + ssect) > s_last)
+ break;
+ if (info->protect[sect + ssect] == 0) { /* not protected */
+ addr = (vu_short *)(info->start[sect + ssect]);
+ addr[0] = 0x0030;
+ l_sect = sect + ssect;
+ }
+ }
+ /* wait at least 80us - let's wait 1 ms */
+ udelay (1000);
+
+ /*
+ * We wait for the last triggered sector
+ */
+ if (l_sect < 0)
+ goto DONE;
+
+ reset_timer_masked ();
+ last = 0;
+ addr = (vu_short *)(info->start[l_sect]);
+ while ((addr[0] & 0x0080) != 0x0080) {
+ if ((now = get_timer_masked ()) > CFG_FLASH_ERASE_TOUT) {
+ printf ("Timeout\n");
+ return 1;
+ }
+ /* show that we're waiting */
+ if ((now - last) > 1000) { /* every second */
+ putc ('.');
+ last = now;
+ }
+ }
+ addr = (vu_short *)info->start[0];
+ addr[0] = 0x00F0; /* reset bank */
+ sect += ssect;
+ }
+
+ /* re-enable interrupts if necessary */
+ if (flag)
+ enable_interrupts();
+
+DONE:
+ /* reset to read mode */
+ addr = (vu_short *)info->start[0];
+ addr[0] = 0x00F0; /* 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 wp, data;
+ int rc;
+
+ if (addr & 1) {
+ printf ("unaligned destination not supported\n");
+ return ERR_ALIGN;
+ };
+
+ if ((int) src & 1) {
+ printf ("unaligned source not supported\n");
+ return ERR_ALIGN;
+ };
+
+ wp = addr;
+
+ while (cnt >= 2) {
+ data = *((vu_short *)src);
+ if ((rc = write_word_amd(info, (vu_short *)wp, data)) != 0) {
+printf ("write_buff 1: write_word_amd() rc=%d\n", rc);
+ return (rc);
+ }
+ src += 2;
+ wp += 2;
+ cnt -= 2;
+ }
+
+ if (cnt == 0) {
+ return (ERR_OK);
+ }
+
+ if (cnt == 1) {
+ data = (*((volatile u8 *) src)) | (*((volatile u8 *) (wp + 1)) << 8);
+ if ((rc = write_word_amd(info, (vu_short *)wp, data)) != 0) {
+printf ("write_buff 1: write_word_amd() rc=%d\n", rc);
+ return (rc);
+ }
+ src += 1;
+ wp += 1;
+ cnt -= 1;
+ }
+
+ return ERR_OK;
+}
+
+/*-----------------------------------------------------------------------
+ * Write a word to Flash for AMD FLASH
+ * A word is 16 or 32 bits, whichever the bus width of the flash bank
+ * (not an individual chip) is.
+ *
+ * returns:
+ * 0 - OK
+ * 1 - write timeout
+ * 2 - Flash not erased
+ */
+static int write_word_amd (flash_info_t *info, vu_short *dest, ushort data)
+{
+ int flag;
+ vu_short *base; /* first address in flash bank */
+
+ /* Check if Flash is (sufficiently) erased */
+ if ((*dest & data) != data) {
+ return (2);
+ }
+
+ base = (vu_short *)(info->start[0]);
+
+ /* Disable interrupts which might cause a timeout here */
+ flag = disable_interrupts();
+
+ base[FLASH_CYCLE1] = 0x00AA; /* unlock */
+ base[FLASH_CYCLE2] = 0x0055; /* unlock */
+ base[FLASH_CYCLE1] = 0x00A0; /* selects program mode */
+
+ *dest = data; /* start programming the data */
+
+ /* re-enable interrupts if necessary */
+ if (flag)
+ enable_interrupts();
+
+ reset_timer_masked ();
+
+ /* data polling for D7 */
+ while ((*dest & 0x0080) != (data & 0x0080)) {
+ if (get_timer_masked () > CFG_FLASH_WRITE_TOUT) {
+ *dest = 0x00F0; /* reset bank */
+ return (1);
+ }
+ }
+ return (0);
+}
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