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Diffstat (limited to 'board/hidden_dragon/flash.c')
-rw-r--r--board/hidden_dragon/flash.c575
1 files changed, 575 insertions, 0 deletions
diff --git a/board/hidden_dragon/flash.c b/board/hidden_dragon/flash.c
new file mode 100644
index 0000000..21c5a01
--- /dev/null
+++ b/board/hidden_dragon/flash.c
@@ -0,0 +1,575 @@
+/*
+ * (C) Copyright 2004
+ * Yusdi Santoso, Adaptec Inc., yusdi_santoso@adaptec.com
+ *
+ * (C) Copyright 2000-2005
+ * 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>
+#include <mpc824x.h>
+#include <asm/processor.h>
+#include <asm/pci_io.h>
+#include <w83c553f.h>
+
+#define ROM_CS0_START 0xFF800000
+#define ROM_CS1_START 0xFF000000
+
+flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */
+
+#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
+
+/*-----------------------------------------------------------------------
+ * Functions
+ */
+static int write_word (flash_info_t *info, ulong dest, ulong data);
+
+/*flash command address offsets*/
+
+#define ADDR0 (0xAAA)
+#define ADDR1 (0x555)
+#define ADDR3 (0x001)
+
+#define FLASH_WORD_SIZE unsigned char
+
+/*-----------------------------------------------------------------------
+ */
+
+static unsigned long flash_id (unsigned char mfct, unsigned char chip)
+ __attribute__ ((const));
+
+typedef struct {
+ FLASH_WORD_SIZE extval;
+ unsigned short intval;
+} map_entry;
+
+static unsigned long flash_id (unsigned char mfct, unsigned char chip)
+{
+ static const map_entry mfct_map[] = {
+ {(FLASH_WORD_SIZE) AMD_MANUFACT,
+ (unsigned short) ((unsigned long) FLASH_MAN_AMD >> 16)},
+ {(FLASH_WORD_SIZE) FUJ_MANUFACT,
+ (unsigned short) ((unsigned long) FLASH_MAN_FUJ >> 16)},
+ {(FLASH_WORD_SIZE) STM_MANUFACT,
+ (unsigned short) ((unsigned long) FLASH_MAN_STM >> 16)},
+ {(FLASH_WORD_SIZE) MT_MANUFACT,
+ (unsigned short) ((unsigned long) FLASH_MAN_MT >> 16)},
+ {(FLASH_WORD_SIZE) INTEL_MANUFACT,
+ (unsigned short) ((unsigned long) FLASH_MAN_INTEL >> 16)},
+ {(FLASH_WORD_SIZE) INTEL_ALT_MANU,
+ (unsigned short) ((unsigned long) FLASH_MAN_INTEL >> 16)}
+ };
+
+ static const map_entry chip_map[] = {
+ {AMD_ID_F040B, FLASH_AM040},
+ {(FLASH_WORD_SIZE) STM_ID_x800AB, FLASH_STM800AB}
+ };
+
+ const map_entry *p;
+ unsigned long result = FLASH_UNKNOWN;
+
+ /* find chip id */
+ for (p = &chip_map[0];
+ p < &chip_map[sizeof chip_map / sizeof chip_map[0]]; p++)
+ if (p->extval == chip) {
+ result = FLASH_VENDMASK | p->intval;
+ break;
+ }
+
+ /* find vendor id */
+ for (p = &mfct_map[0];
+ p < &mfct_map[sizeof mfct_map / sizeof mfct_map[0]]; p++)
+ if (p->extval == mfct) {
+ result &= ~FLASH_VENDMASK;
+ result |= (unsigned long) p->intval << 16;
+ break;
+ }
+
+ return result;
+}
+
+unsigned long flash_init (void)
+{
+ unsigned long i;
+ unsigned char j;
+ static const ulong flash_banks[] = CFG_FLASH_BANKS;
+
+ /* Init: no FLASHes known */
+ for (i = 0; i < CFG_MAX_FLASH_BANKS; i++) {
+ flash_info_t *const pflinfo = &flash_info[i];
+
+ pflinfo->flash_id = FLASH_UNKNOWN;
+ pflinfo->size = 0;
+ pflinfo->sector_count = 0;
+ }
+
+ /* Enable writes to Hidden Dragon flash */
+ {
+ register unsigned char temp;
+
+ CONFIG_READ_BYTE (CFG_WINBOND_ISA_CFG_ADDR + WINBOND_CSCR,
+ temp);
+ temp &= ~0x20; /* clear BIOSWP bit */
+ CONFIG_WRITE_BYTE (CFG_WINBOND_ISA_CFG_ADDR + WINBOND_CSCR,
+ temp);
+ }
+
+ for (i = 0; i < sizeof flash_banks / sizeof flash_banks[0]; i++) {
+ flash_info_t *const pflinfo = &flash_info[i];
+ const unsigned long base_address = flash_banks[i];
+ volatile FLASH_WORD_SIZE *const flash =
+ (FLASH_WORD_SIZE *) base_address;
+
+ flash[0xAAA << (3 * i)] = 0xaa;
+ flash[0x555 << (3 * i)] = 0x55;
+ flash[0xAAA << (3 * i)] = 0x90;
+ __asm__ __volatile__ ("sync");
+
+ pflinfo->flash_id =
+ flash_id (flash[0x0], flash[0x2 + 14 * i]);
+
+ switch (pflinfo->flash_id & FLASH_TYPEMASK) {
+ case FLASH_AM040:
+ pflinfo->size = 0x00080000;
+ pflinfo->sector_count = 8;
+ for (j = 0; j < 8; j++) {
+ pflinfo->start[j] =
+ base_address + 0x00010000 * j;
+ pflinfo->protect[j] = flash[(j << 16) | 0x2];
+ }
+ break;
+ case FLASH_STM800AB:
+ pflinfo->size = 0x00100000;
+ pflinfo->sector_count = 19;
+ pflinfo->start[0] = base_address;
+ pflinfo->start[1] = base_address + 0x4000;
+ pflinfo->start[2] = base_address + 0x6000;
+ pflinfo->start[3] = base_address + 0x8000;
+ for (j = 1; j < 16; j++) {
+ pflinfo->start[j + 3] =
+ base_address + 0x00010000 * j;
+ }
+ break;
+ default:
+ /* The chip used is not listed in flash_id
+ TODO: Change this to explicitly detect the flash type
+ */
+ {
+ int sector_addr = base_address;
+
+ pflinfo->size = 0x00200000;
+ pflinfo->sector_count = 35;
+ pflinfo->start[0] = sector_addr;
+ sector_addr += 0x4000; /* 16K */
+ pflinfo->start[1] = sector_addr;
+ sector_addr += 0x2000; /* 8K */
+ pflinfo->start[2] = sector_addr;
+ sector_addr += 0x2000; /* 8K */
+ pflinfo->start[3] = sector_addr;
+ sector_addr += 0x8000; /* 32K */
+
+ for (j = 4; j < 35; j++) {
+ pflinfo->start[j] = sector_addr;
+ sector_addr += 0x10000; /* 64K */
+ }
+ }
+ break;
+ }
+ /* Protect monitor and environment sectors
+ */
+#if CFG_MONITOR_BASE >= CFG_FLASH_BASE
+ flash_protect (FLAG_PROTECT_SET,
+ CFG_MONITOR_BASE,
+ CFG_MONITOR_BASE + monitor_flash_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
+
+ /* reset device to read mode */
+ flash[0x0000] = 0xf0;
+ __asm__ __volatile__ ("sync");
+ }
+
+ /* only have 1 bank */
+ return flash_info[0].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);
+}
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