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Diffstat (limited to 'board/esd/pf5200/flash.c')
-rw-r--r--board/esd/pf5200/flash.c461
1 files changed, 461 insertions, 0 deletions
diff --git a/board/esd/pf5200/flash.c b/board/esd/pf5200/flash.c
new file mode 100644
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+++ b/board/esd/pf5200/flash.c
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+/*
+ * (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
+ */
+
+#include <common.h>
+
+flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */
+
+typedef unsigned short FLASH_PORT_WIDTH;
+typedef volatile unsigned short FLASH_PORT_WIDTHV;
+
+#define FLASH_ID_MASK 0x00FF
+
+#define FPW FLASH_PORT_WIDTH
+#define FPWV FLASH_PORT_WIDTHV
+
+#define FLASH_CYCLE1 0x0555
+#define FLASH_CYCLE2 0x0aaa
+#define FLASH_ID1 0x00
+#define FLASH_ID2 0x01
+#define FLASH_ID3 0x0E
+#define FLASH_ID4 0x0F
+
+/*-----------------------------------------------------------------------
+ * Functions
+ */
+static ulong flash_get_size(FPWV * addr, flash_info_t * info);
+static void flash_reset(flash_info_t * info);
+static int write_word_amd(flash_info_t * info, FPWV * dest, FPW 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;
+ int i = 0;
+ extern void flash_preinit(void);
+ extern void flash_afterinit(uint, ulong, ulong);
+
+ ulong flashbase = CFG_FLASH_BASE;
+
+ flash_preinit();
+
+ /* There is only ONE FLASH device */
+ memset(&flash_info[i], 0, sizeof(flash_info_t));
+ flash_info[i].size = flash_get_size((FPW *) flashbase, &flash_info[i]);
+ size += flash_info[i].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
+
+ flash_afterinit(i, flash_info[i].start[0], flash_info[i].size);
+ return size ? size : 1;
+}
+
+/*-----------------------------------------------------------------------
+ */
+static void flash_reset(flash_info_t * info) {
+ FPWV *base = (FPWV *) (info->start[0]);
+
+ /* Put FLASH back in read mode */
+ if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) {
+ *base = (FPW) 0x00FF00FF; /* Intel Read Mode */
+ } else if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_AMD) {
+ *base = (FPW) 0x00F000F0; /* AMD Read Mode */
+ }
+}
+
+/*-----------------------------------------------------------------------
+ */
+
+static flash_info_t *flash_get_info(ulong base) {
+ int i;
+ flash_info_t *info;
+
+ 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;
+ uchar *fmt;
+
+ 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;
+ default:
+ printf("Unknown Vendor ");
+ break;
+ }
+
+ switch (info->flash_id & FLASH_TYPEMASK) {
+ case FLASH_AMLV256U:
+ fmt = "29LV256M (256 Mbit)\n";
+ break;
+ default:
+ fmt = "Unknown Chip Type\n";
+ break;
+ }
+
+ printf(fmt);
+ 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) {
+ ulong size;
+ int erased;
+ ulong *flash = (unsigned long *)info->start[i];
+
+ if ((i % 5) == 0) {
+ printf("\n ");
+ }
+
+ /*
+ * Check if whole sector is erased
+ */
+ size =
+ (i !=
+ (info->sector_count - 1)) ? (info->start[i + 1] -
+ info->start[i]) >> 2 : (info->
+ start
+ [0] +
+ info->
+ size -
+ info->
+ start
+ [i])
+ >> 2;
+
+ for (flash = (unsigned long *)info->start[i], erased = 1;
+ (flash != (unsigned long *)info->start[i] + size)
+ && erased; flash++) {
+ erased = *flash == ~0x0UL;
+ }
+ printf(" %08lX %s %s", info->start[i], erased ? "E" : " ",
+ info->protect[i] ? "(RO)" : " ");
+ }
+
+ printf("\n");
+}
+
+/*-----------------------------------------------------------------------
+ */
+
+/*
+ * The following code cannot be run from FLASH!
+ */
+
+ulong flash_get_size(FPWV * addr, flash_info_t * info) {
+ int i;
+
+ /* Write auto select command: read Manufacturer ID */
+ /* Write auto select command sequence and test FLASH answer */
+ addr[FLASH_CYCLE1] = (FPW) 0x00AA00AA; /* for AMD, Intel ignores this */
+ addr[FLASH_CYCLE2] = (FPW) 0x00550055; /* for AMD, Intel ignores this */
+ addr[FLASH_CYCLE1] = (FPW) 0x00900090; /* selects Intel or AMD */
+
+ /* The manufacturer codes are only 1 byte, so just use 1 byte. */
+ /* This works for any bus width and any FLASH device width. */
+ udelay(100);
+ switch (addr[FLASH_ID1] & 0x00ff) {
+ case (uchar) AMD_MANUFACT:
+ info->flash_id = FLASH_MAN_AMD;
+ break;
+ default:
+ printf("unknown vendor=%x ", addr[FLASH_ID1] & 0xff);
+ info->flash_id = FLASH_UNKNOWN;
+ info->sector_count = 0;
+ info->size = 0;
+ break;
+ }
+
+ /* Check 16 bits or 32 bits of ID so work on 32 or 16 bit bus. */
+ if (info->flash_id != FLASH_UNKNOWN) {
+ switch ((FPW) addr[FLASH_ID2]) {
+ case (FPW) AMD_ID_MIRROR:
+ /* MIRROR BIT FLASH, read more ID bytes */
+ if ((FPW) addr[FLASH_ID3] == (FPW) AMD_ID_LV256U_2
+ && (FPW) addr[FLASH_ID4] == (FPW) AMD_ID_LV256U_3) {
+ /* attention: only the first 16 MB will be used in u-boot */
+ info->flash_id += FLASH_AMLV256U;
+ info->sector_count = 512;
+ info->size = 0x02000000;
+ for (i = 0; i < info->sector_count; i++) {
+ info->start[i] =
+ (ulong) addr + 0x10000 * i;
+ }
+ break;
+ }
+ /* fall thru to here ! */
+ default:
+ printf("unknown AMD device=%x %x %x",
+ (FPW) addr[FLASH_ID2], (FPW) addr[FLASH_ID3],
+ (FPW) addr[FLASH_ID4]);
+ info->flash_id = FLASH_UNKNOWN;
+ info->sector_count = 0;
+ info->size = 0x800000;
+ break;
+ }
+
+ /* 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) {
+ FPWV *addr;
+ int flag, prot, sect;
+ int intel = (info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL;
+ ulong start, now, last;
+ int rcode = 0;
+
+ 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;
+ }
+
+ switch (info->flash_id & FLASH_TYPEMASK) {
+ case FLASH_AMLV256U:
+ break;
+ case FLASH_UNKNOWN:
+ default:
+ 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");
+ }
+
+ last = get_timer(0);
+
+ /* Start erase on unprotected sectors */
+ for (sect = s_first; sect <= s_last && rcode == 0; sect++) {
+ if (info->protect[sect] != 0) { /* protected, skip it */
+ continue;
+ }
+ /* Disable interrupts which might cause a timeout here */
+ flag = disable_interrupts();
+
+ addr = (FPWV *) (info->start[sect]);
+ if (intel) {
+ *addr = (FPW) 0x00500050; /* clear status register */
+ *addr = (FPW) 0x00200020; /* erase setup */
+ *addr = (FPW) 0x00D000D0; /* erase confirm */
+ } else {
+ /* must be AMD style if not Intel */
+ FPWV *base; /* first address in bank */
+
+ base = (FPWV *) (info->start[0]);
+ base[FLASH_CYCLE1] = (FPW) 0x00AA00AA; /* unlock */
+ base[FLASH_CYCLE2] = (FPW) 0x00550055; /* unlock */
+ base[FLASH_CYCLE1] = (FPW) 0x00800080; /* erase mode */
+ base[FLASH_CYCLE1] = (FPW) 0x00AA00AA; /* unlock */
+ base[FLASH_CYCLE2] = (FPW) 0x00550055; /* unlock */
+ *addr = (FPW) 0x00300030; /* erase sector */
+ }
+
+ /* re-enable interrupts if necessary */
+ if (flag) {
+ enable_interrupts();
+ }
+ start = get_timer(0);
+
+ /* wait at least 50us for AMD, 80us for Intel. */
+ /* Let's wait 1 ms. */
+ udelay(1000);
+
+ while ((*addr & (FPW) 0x00800080) != (FPW) 0x00800080) {
+ if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
+ printf("Timeout\n");
+ if (intel) {
+ /* suspend erase */
+ *addr = (FPW) 0x00B000B0;
+ }
+ flash_reset(info); /* reset to read mode */
+ rcode = 1; /* failed */
+ break;
+ }
+ /* show that we're waiting */
+ if ((get_timer(last)) > CFG_HZ) {
+ /* every second */
+ putc('.');
+ last = get_timer(0);
+ }
+ }
+ /* show that we're waiting */
+ if ((get_timer(last)) > CFG_HZ) {
+ /* every second */
+ putc('.');
+ last = get_timer(0);
+ }
+ flash_reset(info); /* reset to read mode */
+ }
+ printf(" done\n");
+ return (rcode);
+}
+
+/*-----------------------------------------------------------------------
+ * 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)
+{
+ FPW data = 0; /* 16 or 32 bit word, matches flash bus width on MPC8XX */
+ int bytes; /* number of bytes to program in current word */
+ int left; /* number of bytes left to program */
+ int i, res;
+
+ for (left = cnt, res = 0;
+ left > 0 && res == 0;
+ addr += sizeof(data), left -= sizeof(data) - bytes) {
+
+ bytes = addr & (sizeof(data) - 1);
+ addr &= ~(sizeof(data) - 1);
+
+ /* combine source and destination data so can program
+ * an entire word of 16 or 32 bits
+ */
+ for (i = 0; i < sizeof(data); i++) {
+ data <<= 8;
+ if (i < bytes || i - bytes >= left)
+ data += *((uchar *) addr + i);
+ else
+ data += *src++;
+ }
+
+ /* write one word to the flash */
+ switch (info->flash_id & FLASH_VENDMASK) {
+ case FLASH_MAN_AMD:
+ res = write_word_amd(info, (FPWV *) addr, data);
+ break;
+ default:
+ /* unknown flash type, error! */
+ printf("missing or unknown FLASH type\n");
+ res = 1; /* not really a timeout, but gives error */
+ break;
+ }
+ }
+ return (res);
+}
+
+/*-----------------------------------------------------------------------
+ * 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, FPWV * dest, FPW data) {
+ ulong start;
+ int flag;
+ int res = 0; /* result, assume success */
+ FPWV *base; /* first address in flash bank */
+
+ /* Check if Flash is (sufficiently) erased */
+ if ((*dest & data) != data) {
+ return (2);
+ }
+
+ base = (FPWV *) (info->start[0]);
+
+ /* Disable interrupts which might cause a timeout here */
+ flag = disable_interrupts();
+
+ base[FLASH_CYCLE1] = (FPW) 0x00AA00AA; /* unlock */
+ base[FLASH_CYCLE2] = (FPW) 0x00550055; /* unlock */
+ base[FLASH_CYCLE1] = (FPW) 0x00A000A0; /* selects program mode */
+
+ *dest = data; /* start programming the data */
+
+ /* re-enable interrupts if necessary */
+ if (flag) {
+ enable_interrupts();
+ }
+ start = get_timer(0);
+
+ /* data polling for D7 */
+ while (res == 0
+ && (*dest & (FPW) 0x00800080) != (data & (FPW) 0x00800080)) {
+ if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
+ *dest = (FPW) 0x00F000F0; /* reset bank */
+ res = 1;
+ }
+ }
+ return (res);
+}
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