746 lines
16 KiB
C
746 lines
16 KiB
C
/*
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* (C) Copyright 2000
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*
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* Hacked for the Hymod board by Murray.Jensen@cmst.csiro.au, 20-Oct-00
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*/
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#include <common.h>
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#include <mpc8260.h>
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#include <board/hymod/flash.h>
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flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */
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/*-----------------------------------------------------------------------
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* Protection Flags:
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*/
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#define FLAG_PROTECT_SET 0x01
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#define FLAG_PROTECT_CLEAR 0x02
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/*-----------------------------------------------------------------------
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* Functions
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*/
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#if 0
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static ulong flash_get_size (vu_long *addr, flash_info_t *info);
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static void flash_get_offsets (ulong base, flash_info_t *info);
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#endif
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static int write_word (flash_info_t *info, ulong dest, ulong data);
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/*-----------------------------------------------------------------------
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*/
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/*
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* probe for the existence of flash at bank word address "addr"
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* 0 = yes, 1 = bad Manufacturer's Id, 2 = bad Device Id
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*/
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static int
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bank_probe_word(bank_addr_t addr)
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{
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int retval;
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/* reset the flash */
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*addr = BANK_CMD_RST;
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/* check the manufacturer id */
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*addr = BANK_CMD_RD_ID;
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if (*BANK_ADDR_REG_MAN(addr) != BANK_RD_ID_MAN) {
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retval = -1;
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goto out;
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}
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/* check the device id */
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*addr = BANK_CMD_RD_ID;
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if (*BANK_ADDR_REG_DEV(addr) != BANK_RD_ID_DEV) {
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retval = -2;
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goto out;
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}
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retval = CFG_FLASH_TYPE;
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out:
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/* reset the flash again */
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*addr = BANK_CMD_RST;
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return retval;
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}
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/*
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* probe for flash banks at address "base" and store info for any found
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* into flash_info entry "fip". Must find at least one bank.
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*/
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static void
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bank_probe(flash_info_t *fip, bank_addr_t base)
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{
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bank_addr_t addr, eaddr;
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int nbanks;
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fip->flash_id = FLASH_UNKNOWN;
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fip->size = 0L;
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fip->sector_count = 0;
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addr = base;
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eaddr = BANK_ADDR_BASE(addr, MAX_BANKS);
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nbanks = 0;
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while (addr < eaddr) {
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bank_addr_t addrw, eaddrw, addrb;
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int i, osc, nsc, curtype = -1;
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addrw = addr;
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eaddrw = BANK_ADDR_NEXT_WORD(addrw);
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while (addrw < eaddrw) {
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int thistype;
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#ifdef FLASH_DEBUG
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printf(" probing for flash at addr 0x%08lx\n",
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(unsigned long)addrw);
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#endif
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if ((thistype = bank_probe_word(addrw++)) < 0)
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goto out;
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if (curtype < 0)
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curtype = thistype;
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else {
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if (thistype != curtype) {
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printf("Differing flash type found!\n");
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goto out;
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}
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}
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}
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if (curtype < 0)
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goto out;
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/* bank exists - append info for this bank to *fip */
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fip->flash_id = FLASH_MAN_INTEL|curtype;
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fip->size += BANK_SIZE;
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osc = fip->sector_count;
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fip->sector_count += BANK_NBLOCKS;
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if ((nsc = fip->sector_count) >= CFG_MAX_FLASH_SECT)
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panic("Too many sectors in flash at address 0x%08lx\n",
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(unsigned long)base);
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addrb = addr;
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for (i = osc; i < nsc; i++) {
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fip->start[i] = (ulong)addrb;
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fip->protect[i] = 0;
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addrb = BANK_ADDR_NEXT_BLK(addrb);
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}
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addr = BANK_ADDR_NEXT_BANK(addr);
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nbanks++;
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}
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out:
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if (nbanks == 0)
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panic("ERROR: no flash found at address 0x%08lx\n",
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(unsigned long)base);
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}
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static void
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bank_reset(flash_info_t *info, int sect)
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{
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bank_addr_t addrw, eaddrw;
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addrw = (bank_addr_t)info->start[sect];
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eaddrw = BANK_ADDR_NEXT_WORD(addrw);
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while (addrw < eaddrw) {
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#ifdef FLASH_DEBUG
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printf(" writing reset cmd to addr 0x%08lx\n",
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(unsigned long)addrw);
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#endif
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*addrw = BANK_CMD_RST;
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addrw++;
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}
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}
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static void
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bank_erase_init(flash_info_t *info, int sect)
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{
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bank_addr_t addrw, saddrw, eaddrw;
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int flag;
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#ifdef FLASH_DEBUG
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printf("0x%08lx BANK_CMD_PROG\n", BANK_CMD_PROG);
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printf("0x%08lx BANK_CMD_ERASE1\n", BANK_CMD_ERASE1);
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printf("0x%08lx BANK_CMD_ERASE2\n", BANK_CMD_ERASE2);
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printf("0x%08lx BANK_CMD_CLR_STAT\n", BANK_CMD_CLR_STAT);
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printf("0x%08lx BANK_CMD_RST\n", BANK_CMD_RST);
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printf("0x%08lx BANK_STAT_RDY\n", BANK_STAT_RDY);
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printf("0x%08lx BANK_STAT_ERR\n", BANK_STAT_ERR);
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#endif
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saddrw = (bank_addr_t)info->start[sect];
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eaddrw = BANK_ADDR_NEXT_WORD(saddrw);
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#ifdef FLASH_DEBUG
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printf("erasing sector %d, start addr = 0x%08lx "
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"(bank next word addr = 0x%08lx)\n", sect,
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(unsigned long)saddrw, (unsigned long)eaddrw);
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#endif
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/* Disable intrs which might cause a timeout here */
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flag = disable_interrupts();
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for (addrw = saddrw; addrw < eaddrw; addrw++) {
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#ifdef FLASH_DEBUG
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printf(" writing erase cmd to addr 0x%08lx\n",
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(unsigned long)addrw);
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#endif
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*addrw = BANK_CMD_ERASE1;
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*addrw = BANK_CMD_ERASE2;
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}
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/* re-enable interrupts if necessary */
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if (flag)
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enable_interrupts();
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}
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static int
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bank_erase_poll(flash_info_t *info, int sect)
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{
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bank_addr_t addrw, saddrw, eaddrw;
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int sectdone, haderr;
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saddrw = (bank_addr_t)info->start[sect];
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eaddrw = BANK_ADDR_NEXT_WORD(saddrw);
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sectdone = 1;
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haderr = 0;
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for (addrw = saddrw; addrw < eaddrw; addrw++) {
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bank_word_t stat = *addrw;
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#ifdef FLASH_DEBUG
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printf(" checking status at addr "
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"0x%08lx [0x%08lx]\n",
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(unsigned long)addrw, stat);
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#endif
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if ((stat & BANK_STAT_RDY) != BANK_STAT_RDY)
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sectdone = 0;
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else if ((stat & BANK_STAT_ERR) != 0) {
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printf(" failed on sector %d "
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"(stat = 0x%08lx) at "
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"address 0x%08lx\n",
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sect, stat,
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(unsigned long)addrw);
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*addrw = BANK_CMD_CLR_STAT;
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haderr = 1;
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}
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}
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if (haderr)
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return (-1);
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else
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return (sectdone);
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}
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static int
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bank_write_word(bank_addr_t addr, bank_word_t value)
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{
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bank_word_t stat;
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ulong start;
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int flag, retval;
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/* Disable interrupts which might cause a timeout here */
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flag = disable_interrupts();
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*addr = BANK_CMD_PROG;
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*addr = value;
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/* re-enable interrupts if necessary */
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if (flag)
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enable_interrupts();
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retval = 0;
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/* data polling for D7 */
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start = get_timer (0);
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do {
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if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
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retval = 1;
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goto done;
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}
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stat = *addr;
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} while ((stat & BANK_STAT_RDY) != BANK_STAT_RDY);
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if ((stat & BANK_STAT_ERR) != 0) {
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printf("flash program failed (stat = 0x%08lx) "
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"at address 0x%08lx\n", (ulong)stat, (ulong)addr);
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*addr = BANK_CMD_CLR_STAT;
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retval = 3;
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}
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done:
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/* reset to read mode */
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*addr = BANK_CMD_RST;
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return (retval);
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}
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/*-----------------------------------------------------------------------
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*/
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unsigned long
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flash_init(void)
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{
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int i;
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/* Init: no FLASHes known */
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for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) {
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flash_info[i].flash_id = FLASH_UNKNOWN;
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}
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bank_probe(&flash_info[0], (bank_addr_t)CFG_FLASH_BASE);
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/*
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* protect monitor and environment sectors
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*/
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#if CFG_MONITOR_BASE == CFG_FLASH_BASE
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(void)flash_protect(FLAG_PROTECT_SET,
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CFG_MONITOR_BASE,
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CFG_MONITOR_BASE+monitor_flash_len-1,
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&flash_info[0]);
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#endif
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#if defined(CFG_FLASH_ENV_ADDR)
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(void)flash_protect(FLAG_PROTECT_SET,
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CFG_FLASH_ENV_ADDR,
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#if defined(CFG_FLASH_ENV_BUF)
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CFG_FLASH_ENV_ADDR + CFG_FLASH_ENV_BUF - 1,
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#else
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CFG_FLASH_ENV_ADDR + CFG_FLASH_ENV_SIZE - 1,
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#endif
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&flash_info[0]);
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#endif
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return flash_info[0].size;
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}
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/*-----------------------------------------------------------------------
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*/
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#if 0
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static void
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flash_get_offsets(ulong base, flash_info_t *info)
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{
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int i;
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/* set up sector start adress table */
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if (info->flash_id & FLASH_BTYPE) {
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/* set sector offsets for bottom boot block type */
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info->start[0] = base + 0x00000000;
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info->start[1] = base + 0x00008000;
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info->start[2] = base + 0x0000C000;
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info->start[3] = base + 0x00010000;
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for (i = 4; i < info->sector_count; i++) {
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info->start[i] = base + (i * 0x00020000) - 0x00060000;
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}
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} else {
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/* set sector offsets for top boot block type */
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i = info->sector_count - 1;
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info->start[i--] = base + info->size - 0x00008000;
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info->start[i--] = base + info->size - 0x0000C000;
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info->start[i--] = base + info->size - 0x00010000;
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for (; i >= 0; i--) {
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info->start[i] = base + i * 0x00020000;
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}
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}
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}
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#endif /* 0 */
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/*-----------------------------------------------------------------------
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*/
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void
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flash_print_info(flash_info_t *info)
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{
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int i;
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if (info->flash_id == FLASH_UNKNOWN) {
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printf ("missing or unknown FLASH type\n");
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return;
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}
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switch (info->flash_id & FLASH_VENDMASK) {
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case FLASH_MAN_INTEL: printf ("INTEL "); break;
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default: printf ("Unknown Vendor "); break;
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}
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switch (info->flash_id & FLASH_TYPEMASK) {
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case FLASH_28F320J5: printf ("28F320J5 (32 Mbit, 2 x 16bit)\n");
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break;
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default: printf ("Unknown Chip Type\n");
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break;
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}
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printf (" Size: %ld MB in %d Sectors\n",
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info->size >> 20, info->sector_count);
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printf (" Sector Start Addresses:");
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for (i=0; i<info->sector_count; ++i) {
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if ((i % 5) == 0)
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printf ("\n ");
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printf (" %08lX%s",
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info->start[i],
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info->protect[i] ? " (RO)" : " "
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);
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}
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printf ("\n");
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return;
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}
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/*-----------------------------------------------------------------------
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*/
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/*
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* The following code cannot be run from FLASH!
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*/
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#if 0
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static ulong
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flash_get_size(vu_long *addr, flash_info_t *info)
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{
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short i;
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ulong value;
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ulong base = (ulong)addr;
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/* Write auto select command: read Manufacturer ID */
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addr[0x0555] = 0x00AA00AA;
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addr[0x02AA] = 0x00550055;
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addr[0x0555] = 0x00900090;
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value = addr[0];
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switch (value) {
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case AMD_MANUFACT:
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info->flash_id = FLASH_MAN_AMD;
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break;
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case FUJ_MANUFACT:
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info->flash_id = FLASH_MAN_FUJ;
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break;
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default:
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info->flash_id = FLASH_UNKNOWN;
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info->sector_count = 0;
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info->size = 0;
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return (0); /* no or unknown flash */
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}
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value = addr[1]; /* device ID */
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switch (value) {
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case AMD_ID_LV400T:
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info->flash_id += FLASH_AM400T;
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info->sector_count = 11;
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info->size = 0x00100000;
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break; /* => 1 MB */
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case AMD_ID_LV400B:
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info->flash_id += FLASH_AM400B;
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info->sector_count = 11;
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info->size = 0x00100000;
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break; /* => 1 MB */
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case AMD_ID_LV800T:
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info->flash_id += FLASH_AM800T;
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info->sector_count = 19;
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info->size = 0x00200000;
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break; /* => 2 MB */
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|
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case AMD_ID_LV800B:
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info->flash_id += FLASH_AM800B;
|
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info->sector_count = 19;
|
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info->size = 0x00200000;
|
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break; /* => 2 MB */
|
|
|
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case AMD_ID_LV160T:
|
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info->flash_id += FLASH_AM160T;
|
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info->sector_count = 35;
|
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info->size = 0x00400000;
|
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break; /* => 4 MB */
|
|
|
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case AMD_ID_LV160B:
|
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info->flash_id += FLASH_AM160B;
|
|
info->sector_count = 35;
|
|
info->size = 0x00400000;
|
|
break; /* => 4 MB */
|
|
#if 0 /* enable when device IDs are available */
|
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case AMD_ID_LV320T:
|
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info->flash_id += FLASH_AM320T;
|
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info->sector_count = 67;
|
|
info->size = 0x00800000;
|
|
break; /* => 8 MB */
|
|
|
|
case AMD_ID_LV320B:
|
|
info->flash_id += FLASH_AM320B;
|
|
info->sector_count = 67;
|
|
info->size = 0x00800000;
|
|
break; /* => 8 MB */
|
|
#endif
|
|
default:
|
|
info->flash_id = FLASH_UNKNOWN;
|
|
return (0); /* => no or unknown flash */
|
|
|
|
}
|
|
|
|
/* set up sector start adress table */
|
|
if (info->flash_id & FLASH_BTYPE) {
|
|
/* set sector offsets for bottom boot block type */
|
|
info->start[0] = base + 0x00000000;
|
|
info->start[1] = base + 0x00008000;
|
|
info->start[2] = base + 0x0000C000;
|
|
info->start[3] = base + 0x00010000;
|
|
for (i = 4; i < info->sector_count; i++) {
|
|
info->start[i] = base + (i * 0x00020000) - 0x00060000;
|
|
}
|
|
} else {
|
|
/* set sector offsets for top boot block type */
|
|
i = info->sector_count - 1;
|
|
info->start[i--] = base + info->size - 0x00008000;
|
|
info->start[i--] = base + info->size - 0x0000C000;
|
|
info->start[i--] = base + info->size - 0x00010000;
|
|
for (; i >= 0; i--) {
|
|
info->start[i] = base + i * 0x00020000;
|
|
}
|
|
}
|
|
|
|
/* 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 */
|
|
addr = (volatile unsigned long *)(info->start[i]);
|
|
info->protect[i] = addr[2] & 1;
|
|
}
|
|
|
|
/*
|
|
* Prevent writes to uninitialized FLASH.
|
|
*/
|
|
if (info->flash_id != FLASH_UNKNOWN) {
|
|
addr = (volatile unsigned long *)info->start[0];
|
|
|
|
*addr = 0x00F000F0; /* reset bank */
|
|
}
|
|
|
|
return (info->size);
|
|
}
|
|
#endif /* 0 */
|
|
|
|
|
|
/*-----------------------------------------------------------------------
|
|
*/
|
|
|
|
int
|
|
flash_erase(flash_info_t *info, int s_first, int s_last)
|
|
{
|
|
int prot, sect, haderr;
|
|
ulong start, now, last;
|
|
int rcode = 0;
|
|
|
|
#ifdef FLASH_DEBUG
|
|
printf("\nflash_erase: erase %d sectors (%d to %d incl.) from\n"
|
|
" Bank # %d: ", s_last - s_first + 1, s_first, s_last,
|
|
(info - flash_info) + 1);
|
|
flash_print_info(info);
|
|
#endif
|
|
|
|
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;
|
|
}
|
|
|
|
prot = 0;
|
|
for (sect=s_first; sect<=s_last; ++sect) {
|
|
if (info->protect[sect]) {
|
|
prot++;
|
|
}
|
|
}
|
|
|
|
if (prot) {
|
|
printf("- Warning: %d protected sector%s will not be erased!\n",
|
|
prot, (prot > 1 ? "s" : ""));
|
|
}
|
|
|
|
start = get_timer (0);
|
|
last = 0;
|
|
haderr = 0;
|
|
|
|
for (sect = s_first; sect <= s_last; sect++) {
|
|
if (info->protect[sect] == 0) { /* not protected */
|
|
ulong estart;
|
|
int sectdone;
|
|
|
|
bank_erase_init(info, sect);
|
|
|
|
/* wait at least 80us - let's wait 1 ms */
|
|
udelay (1000);
|
|
|
|
estart = get_timer(start);
|
|
|
|
do {
|
|
now = get_timer(start);
|
|
|
|
if (now - estart > CFG_FLASH_ERASE_TOUT) {
|
|
printf ("Timeout (sect %d)\n", sect);
|
|
haderr = 1;
|
|
rcode = 1;
|
|
break;
|
|
}
|
|
|
|
#ifndef FLASH_DEBUG
|
|
/* show that we're waiting */
|
|
if ((now - last) > 1000) { /* every second */
|
|
putc ('.');
|
|
last = now;
|
|
}
|
|
#endif
|
|
|
|
sectdone = bank_erase_poll(info, sect);
|
|
|
|
if (sectdone < 0) {
|
|
haderr = 1;
|
|
rcode = 1;
|
|
break;
|
|
}
|
|
|
|
} while (!sectdone);
|
|
|
|
if (haderr)
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (haderr > 0)
|
|
printf (" failed\n");
|
|
else
|
|
printf (" done\n");
|
|
|
|
/* reset to read mode */
|
|
for (sect = s_first; sect <= s_last; sect++) {
|
|
if (info->protect[sect] == 0) { /* not protected */
|
|
bank_reset(info, sect);
|
|
}
|
|
}
|
|
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)
|
|
{
|
|
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)
|
|
{
|
|
int retval;
|
|
|
|
/* Check if Flash is (sufficiently) erased */
|
|
if ((*(ulong *)dest & data) != data) {
|
|
return (2);
|
|
}
|
|
|
|
retval = bank_write_word((bank_addr_t)dest, (bank_word_t)data);
|
|
|
|
return (retval);
|
|
}
|
|
|
|
/*-----------------------------------------------------------------------
|
|
*/
|