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-rw-r--r--board/cmi/flash.c517
1 files changed, 517 insertions, 0 deletions
diff --git a/board/cmi/flash.c b/board/cmi/flash.c
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+/*
+ * (C) Copyright 2003
+ * Martin Winistoerfer, martinwinistoerfer@gmx.ch.
+ *
+ * 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
+ */
+
+/*
+ * File: flash.c
+ *
+ * Discription: This Driver is for 28F320J3A, 28F640J3A and
+ * 28F128J3A Intel flashs working in 16 Bit mode.
+ * They are single bank flashs.
+ *
+ * Most of this code is taken from existing u-boot
+ * source code.
+ */
+
+
+#include <common.h>
+#include <mpc5xx.h>
+
+#if defined(CFG_ENV_IS_IN_FLASH)
+# ifndef CFG_ENV_ADDR
+# define CFG_ENV_ADDR (CFG_FLASH_BASE + CFG_ENV_OFFSET)
+# endif
+# ifndef CFG_ENV_SIZE
+# define CFG_ENV_SIZE CFG_ENV_SECT_SIZE
+# endif
+# ifndef CFG_ENV_SECT_SIZE
+# define CFG_ENV_SECT_SIZE CFG_ENV_SIZE
+# endif
+#endif
+
+#define FLASH_ID_MASK 0xFFFF
+#define FLASH_BLOCK_SIZE 0x00010000
+#define FLASH_CMD_READ_ID 0x0090
+#define FLASH_CMD_RESET 0x00ff
+#define FLASH_CMD_BLOCK_ERASE 0x0020
+#define FLASH_CMD_ERASE_CONFIRM 0x00D0
+#define FLASH_CMD_CLEAR_STATUS 0x0050
+#define FLASH_CMD_SUSPEND_ERASE 0x00B0
+#define FLASH_CMD_WRITE 0x0040
+#define FLASH_CMD_PROTECT 0x0060
+#define FLASH_CMD_PROTECT_SET 0x0001
+#define FLASH_CMD_PROTECT_CLEAR 0x00D0
+#define FLASH_STATUS_DONE 0x0080
+
+flash_info_t flash_info[CFG_MAX_FLASH_BANKS];
+
+/*
+ * Local function prototypes
+ */
+static ulong flash_get_size (vu_short *addr, flash_info_t *info);
+static int write_short (flash_info_t *info, ulong dest, ushort data);
+static void flash_get_offsets (ulong base, flash_info_t *info);
+
+/*
+ * Initialize flash
+ */
+
+unsigned long flash_init (void)
+{
+ 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 */
+#if 1
+ debug ("\n## Get flash bank 1 size @ 0x%08x\n",FLASH_BASE0_PRELIM);
+#endif
+ size_b0 = flash_get_size((vu_short *)FLASH_BASE0_PRELIM, &flash_info[0]);
+
+ if (flash_info[0].flash_id == FLASH_UNKNOWN) {
+ printf ("## Unknown FLASH on Bank 0: "
+ "ID 0x%lx, Size = 0x%08lx = %ld MB\n",
+ flash_info[0].flash_id,
+ size_b0, size_b0<<20);
+ }
+
+ flash_get_offsets (FLASH_BASE0_PRELIM, &flash_info[0]);
+
+ flash_info[0].size = size_b0;
+
+#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_SECT_SIZE-1,
+ &flash_info[0]);
+#endif
+
+ return size_b0;
+}
+
+/*
+ * Compute start adress of each sector (block)
+ */
+
+static void flash_get_offsets (ulong base, flash_info_t *info)
+{
+ int i;
+
+ if (info->flash_id == FLASH_UNKNOWN) {
+ return;
+ }
+
+ switch (info->flash_id & FLASH_VENDMASK) {
+ case FLASH_MAN_INTEL:
+ for (i = 0; i < info->sector_count; i++) {
+ info->start[i] = base + i * FLASH_BLOCK_SIZE;
+ }
+ return;
+
+ default:
+ printf ("Don't know sector offsets for flash type 0x%lx\n",
+ info->flash_id);
+ return;
+ }
+}
+
+/*
+ * Print flash information
+ */
+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_SST: printf ("SST "); break;
+ case FLASH_MAN_STM: printf ("STM "); break;
+ case FLASH_MAN_INTEL: printf ("Intel "); break;
+ case FLASH_MAN_MT: printf ("MT "); break;
+ default: printf ("Unknown Vendor "); break;
+ }
+
+ switch (info->flash_id & FLASH_TYPEMASK) {
+ case FLASH_28F320J3A: printf ("28F320J3A (32Mbit) 16-Bit\n");
+ break;
+ case FLASH_28F640J3A: printf ("28F640J3A (64Mbit) 16-Bit\n");
+ break;
+ case FLASH_28F128J3A: printf ("28F128J3A (128Mbit) 16-Bit\n");
+ break;
+ default: printf ("Unknown Chip Type\n");
+ break;
+ }
+
+ if (info->size >= (1 << 20)) {
+ i = 20;
+ } else {
+ i = 10;
+ }
+ printf (" Size: %ld %cB in %d Sectors\n",
+ info->size >> i,
+ (i == 20) ? 'M' : 'k',
+ 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;
+}
+
+/*
+ * Get size of flash in bytes.
+ * The following code cannot be run from FLASH!
+ */
+
+static ulong flash_get_size (vu_short *addr, flash_info_t *info)
+{
+ vu_short value;
+
+ /* Read Manufacturer ID */
+ addr[0] = FLASH_CMD_READ_ID;
+ value = addr[0];
+
+ switch (value) {
+ case (AMD_MANUFACT & FLASH_ID_MASK):
+ info->flash_id = FLASH_MAN_AMD;
+ break;
+ case (FUJ_MANUFACT & FLASH_ID_MASK):
+ info->flash_id = FLASH_MAN_FUJ;
+ break;
+ case (SST_MANUFACT & FLASH_ID_MASK):
+ info->flash_id = FLASH_MAN_SST;
+ break;
+ case (STM_MANUFACT & FLASH_ID_MASK):
+ info->flash_id = FLASH_MAN_STM;
+ break;
+ case (INTEL_MANUFACT & FLASH_ID_MASK):
+ info->flash_id = FLASH_MAN_INTEL;
+ break;
+ default:
+ info->flash_id = FLASH_UNKNOWN;
+ info->sector_count = 0;
+ info->size = 0;
+ addr[0] = FLASH_CMD_RESET; /* restore read mode */
+ return (0); /* no or unknown flash */
+ }
+
+ value = addr[1]; /* device ID */
+
+ switch (value) {
+ case (INTEL_ID_28F320J3A & FLASH_ID_MASK):
+ info->flash_id += FLASH_28F320J3A;
+ info->sector_count = 32;
+ info->size = 0x00400000;
+ break; /* => 32 MBit */
+
+ case (INTEL_ID_28F640J3A & FLASH_ID_MASK):
+ info->flash_id += FLASH_28F640J3A;
+ info->sector_count = 64;
+ info->size = 0x00800000;
+ break; /* => 64 MBit */
+
+ case (INTEL_ID_28F128J3A & FLASH_ID_MASK):
+ info->flash_id += FLASH_28F128J3A;
+ info->sector_count = 128;
+ info->size = 0x01000000;
+ break; /* => 128 MBit */
+
+ default:
+ info->flash_id = FLASH_UNKNOWN;
+ addr[0] = FLASH_CMD_RESET; /* restore read mode */
+ return (0); /* => no or unknown flash */
+
+ }
+
+ if (info->sector_count > CFG_MAX_FLASH_SECT) {
+ printf ("** ERROR: sector count %d > max (%d) **\n",
+ info->sector_count, CFG_MAX_FLASH_SECT);
+ info->sector_count = CFG_MAX_FLASH_SECT;
+ }
+
+ addr[0] = FLASH_CMD_RESET; /* restore read mode */
+
+ return (info->size);
+}
+
+
+/*
+ * Erase unprotected sectors
+ */
+
+int flash_erase (flash_info_t *info, int s_first, int s_last)
+{
+ int flag, prot, 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_VENDMASK) != FLASH_MAN_INTEL) {
+ printf ("Can erase only Intel flash types - aborted\n");
+ 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");
+ }
+
+ start = get_timer (0);
+ last = start;
+
+ /* Start erase on unprotected sectors */
+ for (sect = s_first; sect<=s_last; sect++) {
+ if (info->protect[sect] == 0) { /* not protected */
+ vu_short *addr = (vu_short *)(info->start[sect]);
+ unsigned long status;
+
+ /* Disable interrupts which might cause a timeout here */
+ flag = disable_interrupts();
+
+#ifdef DEBUG
+ printf("Erase sector %d at start addr 0x%08X", sect, (unsigned int)info->start[sect]);
+#endif
+
+ *addr = FLASH_CMD_CLEAR_STATUS;
+ *addr = FLASH_CMD_BLOCK_ERASE;
+ *addr = FLASH_CMD_ERASE_CONFIRM;
+
+ /* re-enable interrupts if necessary */
+ if (flag)
+ enable_interrupts();
+
+ /* wait at least 80us - let's wait 1 ms */
+ udelay (1000);
+
+ while (((status = *addr) & FLASH_STATUS_DONE) != FLASH_STATUS_DONE) {
+ if ((now=get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
+ printf("Flash erase timeout at address %lx\n", info->start[sect]);
+ *addr = FLASH_CMD_SUSPEND_ERASE;
+ *addr = FLASH_CMD_RESET;
+ return 1;
+ }
+
+ /* show that we're waiting */
+ if ((now - last) > 1000) { /* every second */
+ putc ('.');
+ last = now;
+ }
+ }
+ *addr = FLASH_CMD_RESET;
+ }
+ }
+ printf (" done\n");
+ return 0;
+}
+
+/*
+ * Copy memory to flash, returns:
+ * 0 - OK
+ * 1 - write timeout
+ * 2 - Flash not erased
+ * 4 - Flash not identified
+ */
+
+int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
+{
+ ulong cp, wp;
+ ushort data;
+ int i, rc;
+
+ if (info->flash_id == FLASH_UNKNOWN) {
+ return 4;
+ }
+
+ wp = (addr & ~1); /* get lower word aligned address */
+
+ /*
+ * handle unaligned start byte
+ */
+
+ if (addr - wp) {
+ data = 0;
+ data = (data << 8) | *src++;
+ --cnt;
+ if ((rc = write_short(info, wp, data)) != 0) {
+ return (rc);
+ }
+ wp += 2;
+ }
+
+ /*
+ * handle word aligned part
+ */
+
+ while (cnt >= 2) {
+ data = 0;
+ for (i=0; i<2; ++i) {
+ data = (data << 8) | *src++;
+ }
+
+ if ((rc = write_short(info, wp, data)) != 0) {
+ return (rc);
+ }
+ wp += 2;
+ cnt -= 2;
+ }
+
+ if (cnt == 0) {
+ return (0);
+ }
+
+ /*
+ * handle unaligned tail bytes
+ */
+
+ data = 0;
+ for (i=0, cp=wp; i<2 && cnt>0; ++i, ++cp) {
+ data = (data << 8) | *src++;
+ --cnt;
+ }
+ for (; i<2; ++i, ++cp) {
+ data = (data << 8) | (*(uchar *)cp);
+ }
+
+ return (write_short(info, wp, data));
+
+}
+
+/*
+ * Write 16 bit (short) to flash
+ */
+
+static int write_short (flash_info_t *info, ulong dest, ushort data)
+{
+ vu_short *addr = (vu_short*)(info->start[0]);
+ ulong start;
+ int flag;
+
+ /* Check if Flash is (sufficiently) erased */
+ if ((*((vu_short *)dest) & data) != data) {
+ return (2);
+ }
+
+ /* Disable interrupts which might cause a timeout here */
+ flag = disable_interrupts();
+
+ if (!(info->flash_id & FLASH_VENDMASK)) {
+ return 4;
+ }
+ *addr = FLASH_CMD_ERASE_CONFIRM;
+ *addr = FLASH_CMD_WRITE;
+
+ *((vu_short *)dest) = data;
+
+ /* re-enable interrupts if necessary */
+ if (flag) {
+ enable_interrupts();
+ }
+
+ /* data polling for D7 */
+ start = get_timer (0);
+
+ /* wait for error or finish */
+ while(!(addr[0] & FLASH_STATUS_DONE)){
+ if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
+ addr[0] = FLASH_CMD_RESET;
+ return (1);
+ }
+ }
+
+ *addr = FLASH_CMD_RESET;
+ return (0);
+}
+
+/*
+ * Protects a flash sector
+ */
+
+int flash_real_protect(flash_info_t *info, long sector, int prot)
+{
+ vu_short *addr = (vu_short*)(info->start[sector]);
+ ulong start;
+
+ *addr = FLASH_CMD_CLEAR_STATUS;
+ *addr = FLASH_CMD_PROTECT;
+
+ if(prot) {
+ *addr = FLASH_CMD_PROTECT_SET;
+ } else {
+ *addr = FLASH_CMD_PROTECT_CLEAR;
+ }
+
+ /* wait for error or finish */
+ start = get_timer (0);
+ while(!(addr[0] & FLASH_STATUS_DONE)){
+ if (get_timer(start) > CFG_FLASH_ERASE_TOUT) {
+ printf("Flash protect timeout at address %lx\n", info->start[sector]);
+ addr[0] = FLASH_CMD_RESET;
+ return (1);
+ }
+ }
+ /* Set software protect flag */
+ info->protect[sector] = prot;
+ *addr = FLASH_CMD_RESET;
+ return (0);
+}
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