+++ /dev/null
-/*
- * (C) Copyright 2000-2004
- * 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 <ppc4xx.h>
-#include <asm/processor.h>
-
-#if CFG_MAX_FLASH_BANKS != 1
-#error "CFG_MAX_FLASH_BANKS must be 1"
-#endif
-flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */
-
-/*-----------------------------------------------------------------------
- * Functions
- */
-static ulong flash_get_size (vu_long * addr, flash_info_t * info);
-static int write_word (flash_info_t * info, ulong dest, ulong data);
-static void flash_get_offsets (ulong base, flash_info_t * info);
-
-#define ADDR0 0x5555
-#define ADDR1 0x2aaa
-#define FLASH_WORD_SIZE unsigned char
-
-/*-----------------------------------------------------------------------*/
-
-unsigned long flash_init (void)
-{
- unsigned long size_b0;
-
- /* Init: no FLASHes known */
- flash_info[0].flash_id = FLASH_UNKNOWN;
-
- /* Static FLASH Bank configuration here - FIXME XXX */
-
- size_b0 = flash_get_size ((vu_long *) FLASH_BASE0_PRELIM,
- &flash_info[0]);
-
- if (flash_info[0].flash_id == FLASH_UNKNOWN) {
- printf ("## Unknown FLASH on Bank 0- Size=0x%08lx=%ld MB\n",
- size_b0, size_b0 << 20);
- }
-
- /* Only one bank */
- /* Setup offsets */
- flash_get_offsets (FLASH_BASE0_PRELIM, &flash_info[0]);
-
- /* Monitor protection ON by default */
- (void) flash_protect (FLAG_PROTECT_SET,
- FLASH_BASE0_PRELIM,
- FLASH_BASE0_PRELIM + monitor_flash_len - 1,
- &flash_info[0]);
- flash_info[0].size = size_b0;
-
- return size_b0;
-}
-
-
-/*-----------------------------------------------------------------------*/
-/*
- * This implementation assumes that the flash chips are uniform sector
- * devices. This is true for all likely flash devices on a HCUx.
- */
-static void flash_get_offsets (ulong base, flash_info_t * info)
-{
- unsigned idx;
- unsigned long sector_size = info->size / info->sector_count;
-
- for (idx = 0; idx < info->sector_count; idx += 1) {
- info->start[idx] = base + (idx * sector_size);
- }
-}
-
-/*-----------------------------------------------------------------------*/
-void flash_print_info (flash_info_t * info)
-{
- int i;
- int k;
- int size;
- int erased;
- volatile unsigned long *flash;
-
- 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 ("ST Micro ");
- break;
- default:
- printf ("Unknown Vendor ");
- break;
- }
-
- /* (Reduced table of only parts expected in HCUx boards.) */
- switch (info->flash_id) {
- case FLASH_MAN_AMD | FLASH_AM040:
- printf ("AM29F040 (512 Kbit, uniform sector size)\n");
- break;
- case FLASH_MAN_STM | FLASH_AM040:
- printf ("MM29W040W (512 Kbit, uniform sector size)\n");
- break;
- default:
- printf ("Unknown Chip Type\n");
- break;
- }
-
- printf (" Size: %ld KB in %d Sectors\n",
- info->size >> 10, info->sector_count);
-
- printf (" Sector Start Addresses:");
- for (i = 0; i < info->sector_count; ++i) {
- /*
- * Check if whole sector is erased
- */
- if (i != (info->sector_count - 1))
- size = info->start[i + 1] - info->start[i];
- else
- size = info->start[0] + info->size - info->start[i];
- erased = 1;
- flash = (volatile unsigned long *) info->start[i];
- size = size >> 2; /* divide by 4 for longword access */
- for (k = 0; k < size; k++) {
- if (*flash++ != 0xffffffff) {
- erased = 0;
- break;
- }
- }
-
- if ((i % 5) == 0)
- printf ("\n ");
- printf (" %08lX%s%s",
- info->start[i],
- erased ? " E" : " ", info->protect[i] ? "RO " : " "
- );
- }
- printf ("\n");
- return;
-}
-
-/*-----------------------------------------------------------------------*/
-
-/*
- * The following code cannot be run from FLASH!
- */
-static ulong flash_get_size (vu_long * addr, flash_info_t * info)
-{
- short i;
- FLASH_WORD_SIZE value;
- ulong base = (ulong) addr;
- volatile FLASH_WORD_SIZE *addr2 = (FLASH_WORD_SIZE *) addr;
-
- /* Write auto select command: read Manufacturer ID */
- asm("isync");
- addr2[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA;
- asm("isync");
- addr2[ADDR1] = (FLASH_WORD_SIZE) 0x00550055;
- asm("isync");
- addr2[ADDR0] = (FLASH_WORD_SIZE) 0x00900090;
- asm("isync");
-
- value = addr2[0];
- asm("isync");
-
- switch (value) {
- case (FLASH_WORD_SIZE) AMD_MANUFACT:
- info->flash_id = FLASH_MAN_AMD;
- break;
- case (FLASH_WORD_SIZE) FUJ_MANUFACT:
- info->flash_id = FLASH_MAN_FUJ;
- break;
- case (FLASH_WORD_SIZE) SST_MANUFACT:
- info->flash_id = FLASH_MAN_SST;
- break;
- case (FLASH_WORD_SIZE)STM_MANUFACT:
- info->flash_id = FLASH_MAN_STM;
- break;
- default:
- info->flash_id = FLASH_UNKNOWN;
- info->sector_count = 0;
- info->size = 0;
- printf("Unknown flash manufacturer code: 0x%x at %p\n",
- value, addr);
- addr2[ADDR0] = (FLASH_WORD_SIZE) 0;
- return (0); /* no or unknown flash */
- }
-
- value = addr2[1]; /* device ID */
-
- switch (value) {
- case (FLASH_WORD_SIZE) AMD_ID_F040B:
- info->flash_id += FLASH_AM040;
- info->sector_count = 8;
- info->size = 0x0080000; /* => 512 ko */
- break;
- case (FLASH_WORD_SIZE) AMD_ID_LV040B:
- info->flash_id += FLASH_AM040;
- info->sector_count = 8;
- info->size = 0x0080000; /* => 512 ko */
- break;
- case (FLASH_WORD_SIZE)STM_ID_M29W040B: /* most likele HCU5 chip */
- info->flash_id += FLASH_AM040;
- info->sector_count = 8;
- info->size = 0x0080000; /* => 512 ko */
- break;
- default:
- info->flash_id = FLASH_UNKNOWN;
- return (0); /* => no or unknown flash */
-
- }
-
- /* Calculate the sector offsets (Use HCUx Optimized code). */
- flash_get_offsets(base, info);
-
- /* check for protected sectors */
- for (i = 0; i < info->sector_count; i++) {
- /* read sector protection at sector address,
- *(A7 .. A0) = 0x02
- * D0 = 1 if protected
- */
- addr2 = (volatile FLASH_WORD_SIZE *) (info->start[i]);
- if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST)
- info->protect[i] = 0;
- else
- info->protect[i] = addr2[2] & 1;
- }
-
- /*
- * Prevent writes to uninitialized FLASH.
- */
- if (info->flash_id != FLASH_UNKNOWN) {
- addr2 = (FLASH_WORD_SIZE *) info->start[0];
- *addr2 = (FLASH_WORD_SIZE) 0x00F000F0; /* reset bank */
- }
-
- return (info->size);
-}
-
-int wait_for_DQ7 (flash_info_t * info, int sect)
-{
- ulong start, now, last;
- volatile FLASH_WORD_SIZE *addr =
- (FLASH_WORD_SIZE *) (info->start[sect]);
-
- start = get_timer (0);
- last = start;
- 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 */
- putc ('.');
- last = now;
- }
- }
- return 0;
-}
-
-/*-----------------------------------------------------------------------*/
-
-int flash_erase (flash_info_t * info, int s_first, int s_last)
-{
- volatile FLASH_WORD_SIZE *addr = (FLASH_WORD_SIZE *) (info->start[0]);
- volatile FLASH_WORD_SIZE *addr2;
- int flag, prot, sect, l_sect;
- int i;
-
- 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) {
- 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 not erased!\n",
- prot);
- } else {
- printf ("\n");
- }
-
- l_sect = -1;
-
- /* Disable interrupts which might cause a timeout here */
- flag = disable_interrupts ();
-
- /* Start erase on unprotected sectors */
- for (sect = s_first; sect <= s_last; sect++) {
- if (info->protect[sect] == 0) { /* not protected */
- addr2 = (FLASH_WORD_SIZE *) (info->start[sect]);
- printf ("Erasing sector %p\n", addr2); /* CLH */
-
- if ((info->flash_id & FLASH_VENDMASK) ==
- FLASH_MAN_SST) {
- addr[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA;
- addr[ADDR1] = (FLASH_WORD_SIZE) 0x00550055;
- addr[ADDR0] = (FLASH_WORD_SIZE) 0x00800080;
- addr[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA;
- addr[ADDR1] = (FLASH_WORD_SIZE) 0x00550055;
- /* block erase */
- addr2[0] = (FLASH_WORD_SIZE) 0x00500050;
- for (i = 0; i < 50; i++) udelay (1000);
- } else {
- addr[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA;
- addr[ADDR1] = (FLASH_WORD_SIZE) 0x00550055;
- addr[ADDR0] = (FLASH_WORD_SIZE) 0x00800080;
- addr[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA;
- addr[ADDR1] = (FLASH_WORD_SIZE) 0x00550055;
- /* sector erase */
- addr2[0] = (FLASH_WORD_SIZE) 0x00300030;
- }
- l_sect = sect;
- /*
- * Wait for each sector to complete, it's more
- * reliable. According to AMD Spec, you must
- * issue all erase commands within a specified
- * timeout. This has been seen to fail, especially
- * if printf()s are included (for debug)!!
- */
- wait_for_DQ7 (info, 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;
- wait_for_DQ7 (info, l_sect);
-
-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 = (FLASH_WORD_SIZE *) dest;
- volatile FLASH_WORD_SIZE *data2 = (FLASH_WORD_SIZE *) & data;
- ulong start;
- int i;
-
- /* Check if Flash is (sufficiently) erased */
- if ((*((volatile FLASH_WORD_SIZE *) dest) &
- (FLASH_WORD_SIZE) data) != (FLASH_WORD_SIZE) data) {
- return (2);
- }
-
- for (i = 0; i < 4 / sizeof (FLASH_WORD_SIZE); i++) {
- int flag;
-
- /* Disable interrupts which might cause a timeout here */
- flag = disable_interrupts ();
-
- addr2[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA;
- addr2[ADDR1] = (FLASH_WORD_SIZE) 0x00550055;
- addr2[ADDR0] = (FLASH_WORD_SIZE) 0x00A000A0;
-
- dest2[i] = data2[i];
-
- /* re-enable interrupts if necessary */
- if (flag)
- enable_interrupts ();
-
- /* data polling for D7 */
- start = get_timer (0);
- while ((dest2[i] & (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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