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-rw-r--r--board/utx8245/flash.c491
1 files changed, 491 insertions, 0 deletions
diff --git a/board/utx8245/flash.c b/board/utx8245/flash.c
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+++ b/board/utx8245/flash.c
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+/*
+ * (C) Copyright 2001
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * (C) Copyright 2002
+ * Gregory E. Allen, gallen@arlut.utexas.edu
+ * Matthew E. Karger, karger@arlut.utexas.edu
+ * Applied Research Laboratories, The University of Texas at Austin
+ *
+ * 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 <mpc824x.h>
+#include <asm/processor.h>
+
+#define ROM_CS0_START 0xFF800000
+#define ROM_CS1_START 0xFF000000
+
+#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_BANK_SIZE 0x200000
+#define MAIN_SECT_SIZE 0x10000
+#define SECT_SIZE_32KB 0x8000
+#define SECT_SIZE_8KB 0x2000
+
+flash_info_t flash_info[CFG_MAX_FLASH_BANKS];
+
+static int write_word (flash_info_t *info, ulong dest, ulong data);
+
+static __inline__ unsigned long get_msr(void)
+{ unsigned long msr;
+ __asm__ __volatile__ ("mfmsr %0" : "=r" (msr) :);
+ return msr;
+}
+
+static __inline__ void set_msr(unsigned long msr)
+{
+ __asm__ __volatile__ ("mtmsr %0" : : "r" (msr));
+}
+
+/*flash command address offsets*/
+#define ADDR0 (0x555)
+#define ADDR1 (0xAAA)
+#define ADDR3 (0x001)
+
+#define FLASH_WORD_SIZE unsigned char
+
+/*---------------------------------------------------------------------*/
+/*#define DEBUG_FLASH 1 */
+
+/*---------------------------------------------------------------------*/
+
+unsigned long flash_init(void)
+{
+ int i, j;
+ ulong size = 0;
+ unsigned char manuf_id, device_id;
+
+ for (i = 0; i < CFG_MAX_FLASH_BANKS; i++)
+ {
+ vu_char *addr = (vu_char *)(CFG_FLASH_BASE + i * FLASH_BANK_SIZE);
+
+ addr[0x555] = 0xAA; /* 3 cycles to read device info. See */
+ addr[0x2AA] = 0x55; /* AM29LV116D datasheet for list of */
+ addr[0x555] = 0x90; /* available commands. */
+
+ manuf_id = addr[0];
+ device_id = addr[1];
+
+#if defined DEBUG_FLASH
+ printf("manuf_id = %x, device_id = %x\n", manuf_id, device_id);
+#endif
+
+ if ( (manuf_id == (uchar)(AMD_MANUFACT)) &&
+ ( device_id == AMD_ID_LV116DT))
+ {
+ flash_info[i].flash_id = ((FLASH_MAN_AMD & FLASH_VENDMASK) << 16) |
+ (AMD_ID_LV116DT & FLASH_TYPEMASK);
+ } else {
+ flash_info[i].flash_id = FLASH_UNKNOWN;
+ addr[0] = (long)0xFFFFFFFF;
+ goto Done;
+ }
+
+#if defined DEBUG_FLASH
+ printf ("flash_id = 0x%08lX\n", flash_info[i].flash_id);
+#endif
+
+ addr[0] = (long)0xFFFFFFFF;
+
+ flash_info[i].size = FLASH_BANK_SIZE;
+ flash_info[i].sector_count = CFG_MAX_FLASH_SECT;
+ memset(flash_info[i].protect, 0, CFG_MAX_FLASH_SECT);
+
+ for (j = 0; j < flash_info[i].sector_count; j++)
+ {
+
+ if (j < (CFG_MAX_FLASH_SECT - 3) )
+
+ flash_info[i].start[j] = CFG_FLASH_BASE + i * FLASH_BANK_SIZE +
+ j * MAIN_SECT_SIZE;
+
+ else if (j == (CFG_MAX_FLASH_SECT - 3) )
+
+ flash_info[i].start[j] = flash_info[i].start[j-1] + SECT_SIZE_32KB;
+
+
+ else
+
+ flash_info[i].start[j] = flash_info[i].start[j-1] + SECT_SIZE_8KB;
+
+ }
+
+ size += flash_info[i].size;
+ }
+
+ /* Protect monitor and environment sectors
+ */
+#if CFG_MONITOR_BASE >= CFG_FLASH_BASE
+ flash_protect(FLAG_PROTECT_SET, CFG_MONITOR_BASE,
+ CFG_MONITOR_BASE + CFG_MONITOR_LEN - 1, &flash_info[0]);
+#endif
+
+#if (CFG_ENV_IS_IN_FLASH == 1) && defined(CFG_ENV_ADDR)
+ flash_protect(FLAG_PROTECT_SET, CFG_ENV_ADDR,
+ CFG_ENV_ADDR + CFG_ENV_SIZE - 1, &flash_info[0]);
+#endif
+
+Done:
+ return size;
+}
+
+/*-----------------------------------------------------------------------
+ */
+void flash_print_info(flash_info_t *info)
+{
+ static const char unk[] = "Unknown";
+ const char *mfct = unk, *type = unk;
+ unsigned int i;
+
+ if(info->flash_id != FLASH_UNKNOWN)
+ {
+ switch(info->flash_id & FLASH_VENDMASK)
+ {
+ case FLASH_MAN_AMD: mfct = "AMD"; break;
+ case FLASH_MAN_FUJ: mfct = "FUJITSU"; break;
+ case FLASH_MAN_STM: mfct = "STM"; break;
+ case FLASH_MAN_SST: mfct = "SST"; break;
+ case FLASH_MAN_BM: mfct = "Bright Microelectonics"; break;
+ case FLASH_MAN_INTEL: mfct = "Intel"; break;
+ }
+
+ switch(info->flash_id & FLASH_TYPEMASK)
+ {
+ case FLASH_AM040: type = "AM29F040B (512K * 8, uniform sector size)"; break;
+ case FLASH_AM400B: type = "AM29LV400B (4 Mbit, bottom boot sect)"; break;
+ case FLASH_AM400T: type = "AM29LV400T (4 Mbit, top boot sector)"; break;
+ case FLASH_AM800B: type = "AM29LV800B (8 Mbit, bottom boot sect)"; break;
+ case FLASH_AM800T: type = "AM29LV800T (8 Mbit, top boot sector)"; break;
+ case FLASH_AM160T: type = "AM29LV160T (16 Mbit, top boot sector)"; break;
+ case FLASH_AM320B: type = "AM29LV320B (32 Mbit, bottom boot sect)"; break;
+ case FLASH_AM320T: type = "AM29LV320T (32 Mbit, top boot sector)"; break;
+ case FLASH_STM800AB: type = "M29W800AB (8 Mbit, bottom boot sect)"; break;
+ case FLASH_SST800A: type = "SST39LF/VF800 (8 Mbit, uniform sector size)"; break;
+ case FLASH_SST160A: type = "SST39LF/VF160 (16 Mbit, uniform sector size)"; break;
+ }
+ }
+
+ printf(
+ "\n Brand: %s Type: %s\n"
+ " Size: %lu KB in %d Sectors\n",
+ mfct,
+ type,
+ info->size >> 10,
+ info->sector_count
+ );
+
+ printf (" Sector Start Addresses:");
+
+ for (i = 0; i < info->sector_count; i++)
+ {
+ unsigned long size;
+ unsigned int erased;
+ unsigned long * flash = (unsigned long *) info->start[i];
+
+ /*
+ * 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(
+ "%s %08lX %s %s",
+ (i % 5) ? "" : "\n ",
+ info->start[i],
+ erased ? "E" : " ",
+ info->protect[i] ? "RO" : " "
+ );
+ }
+
+ puts("\n");
+ return;
+}
+
+/*-----------------------------------------------------------------------
+ */
+
+int flash_erase (flash_info_t *info, int s_first, int s_last)
+{
+ volatile FLASH_WORD_SIZE *addr = (FLASH_WORD_SIZE *)(info->start[0]);
+ int flag, prot, sect, l_sect;
+ ulong start, now, last;
+ unsigned char sh8b;
+
+ 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_MAN_STM | FLASH_AMD_COMP))) {
+ printf ("Can't erase unknown flash type - 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");
+ }
+
+ l_sect = -1;
+
+ /* Check the ROM CS */
+ if ((info->start[0] >= ROM_CS1_START) && (info->start[0] < ROM_CS0_START))
+ sh8b = 3;
+ else
+ sh8b = 0;
+
+ /* Disable interrupts which might cause a timeout here */
+ flag = disable_interrupts();
+
+ addr[ADDR0 << sh8b] = (FLASH_WORD_SIZE)0x00AA00AA;
+ addr[ADDR1 << sh8b] = (FLASH_WORD_SIZE)0x00550055;
+ addr[ADDR0 << sh8b] = (FLASH_WORD_SIZE)0x00800080;
+ addr[ADDR0 << sh8b] = (FLASH_WORD_SIZE)0x00AA00AA;
+ addr[ADDR1 << sh8b] = (FLASH_WORD_SIZE)0x00550055;
+
+ /* Start erase on unprotected sectors */
+ for (sect = s_first; sect<=s_last; sect++)
+ {
+ if (info->protect[sect] == 0)
+ { /* not protected */
+ addr = (FLASH_WORD_SIZE *)(info->start[0] + (
+ (info->start[sect] - info->start[0]) << sh8b));
+
+ if (info->flash_id & FLASH_MAN_SST)
+ {
+ addr[ADDR0 << sh8b] = (FLASH_WORD_SIZE)0x00AA00AA;
+ addr[ADDR1 << sh8b] = (FLASH_WORD_SIZE)0x00550055;
+ addr[ADDR0 << sh8b] = (FLASH_WORD_SIZE)0x00800080;
+ addr[ADDR0 << sh8b] = (FLASH_WORD_SIZE)0x00AA00AA;
+ addr[ADDR1 << sh8b] = (FLASH_WORD_SIZE)0x00550055;
+ addr[0] = (FLASH_WORD_SIZE)0x00500050; /* block erase */
+ udelay(30000); /* wait 30 ms */
+ }
+
+ else
+ addr[0] = (FLASH_WORD_SIZE)0x00300030; /* sector erase */
+
+ 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 = (FLASH_WORD_SIZE *)(info->start[0] + (
+ (info->start[l_sect] - info->start[0]) << sh8b));
+ while ((addr[0] & (FLASH_WORD_SIZE)0x00800080) != (FLASH_WORD_SIZE)0x00800080) {
+ 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 */
+ serial_putc ('.');
+ last = now;
+ }
+ }
+
+DONE:
+ /* reset to read mode */
+ addr = (FLASH_WORD_SIZE *)info->start[0];
+ addr[0] = (FLASH_WORD_SIZE)0x00F000F0; /* 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)
+{
+ volatile FLASH_WORD_SIZE *addr2 = (FLASH_WORD_SIZE *)info->start[0];
+ volatile FLASH_WORD_SIZE *dest2;
+ volatile FLASH_WORD_SIZE *data2 = (FLASH_WORD_SIZE *)&data;
+ ulong start;
+ int flag;
+ int i;
+ unsigned char sh8b;
+
+ /* Check the ROM CS */
+ if ((info->start[0] >= ROM_CS1_START) && (info->start[0] < ROM_CS0_START))
+ sh8b = 3;
+ else
+ sh8b = 0;
+
+ dest2 = (FLASH_WORD_SIZE *)(((dest - info->start[0]) << sh8b) +
+ info->start[0]);
+
+ /* Check if Flash is (sufficiently) erased */
+ if ((*dest2 & (FLASH_WORD_SIZE)data) != (FLASH_WORD_SIZE)data) {
+ return (2);
+ }
+ /* Disable interrupts which might cause a timeout here */
+ flag = disable_interrupts();
+
+ for (i=0; i<4/sizeof(FLASH_WORD_SIZE); i++)
+ {
+ addr2[ADDR0 << sh8b] = (FLASH_WORD_SIZE)0x00AA00AA;
+ addr2[ADDR1 << sh8b] = (FLASH_WORD_SIZE)0x00550055;
+ addr2[ADDR0 << sh8b] = (FLASH_WORD_SIZE)0x00A000A0;
+
+ dest2[i << sh8b] = data2[i];
+
+ /* re-enable interrupts if necessary */
+ if (flag)
+ enable_interrupts();
+
+ /* data polling for D7 */
+ start = get_timer (0);
+ while ((dest2[i << sh8b] & (FLASH_WORD_SIZE)0x00800080) !=
+ (data2[i] & (FLASH_WORD_SIZE)0x00800080)) {
+ if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
+ return (1);
+ }
+ }
+ }
+
+ return (0);
+}
+/*-----------------------------------------------------------------------
+ */