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649 lines
14 KiB
C
649 lines
14 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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#include <common.h>
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#include <board/cogent/flash.h>
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flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */
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#if defined(CONFIG_ENV_IS_IN_FLASH)
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# ifndef CONFIG_ENV_ADDR
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# define CONFIG_ENV_ADDR (CONFIG_SYS_FLASH_BASE + CONFIG_ENV_OFFSET)
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# endif
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# ifndef CONFIG_ENV_SIZE
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# define CONFIG_ENV_SIZE CONFIG_ENV_SECT_SIZE
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# endif
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# ifndef CONFIG_ENV_SECT_SIZE
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# define CONFIG_ENV_SECT_SIZE CONFIG_ENV_SIZE
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# endif
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#endif
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/*-----------------------------------------------------------------------
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* Functions
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*/
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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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#if defined(CONFIG_CMA302)
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/*
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* probe for the existence of flash at 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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c302f_probe_word(c302f_addr_t addr)
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{
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/* reset the flash */
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*addr = C302F_BNK_CMD_RST;
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/* check the manufacturer id */
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*addr = C302F_BNK_CMD_RD_ID;
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if (*C302F_BNK_ADDR_MAN(addr) != C302F_BNK_RD_ID_MAN)
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return 1;
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/* check the device id */
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*addr = C302F_BNK_CMD_RD_ID;
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if (*C302F_BNK_ADDR_DEV(addr) != C302F_BNK_RD_ID_DEV)
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return 2;
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#ifdef FLASH_DEBUG
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{
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int i;
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printf("\nMaster Lock Config = 0x%08lx\n",
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*C302F_BNK_ADDR_CFGM(addr));
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for (i = 0; i < C302F_BNK_NBLOCKS; i++)
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printf("Block %2d Lock Config = 0x%08lx\n",
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i, *C302F_BNK_ADDR_CFG(i, addr));
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}
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#endif
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/* reset the flash again */
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*addr = C302F_BNK_CMD_RST;
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return 0;
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}
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/*
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* probe for Cogent CMA302 flash module at address "base" and store
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* info for any found into flash_info entry "fip". Must find at least
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* one bank.
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*/
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static void
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c302f_probe(flash_info_t *fip, c302f_addr_t base)
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{
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c302f_addr_t addr, eaddr;
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int nbanks;
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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 = C302F_BNK_ADDR_BASE(addr, C302F_MAX_BANKS);
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nbanks = 0;
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while (addr < eaddr) {
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c302f_addr_t addrw, eaddrw, addrb;
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int i, osc, nsc;
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addrw = addr;
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eaddrw = C302F_BNK_ADDR_NEXT_WORD(addrw);
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while (addrw < eaddrw)
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if (c302f_probe_word(addrw++) != 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|FLASH_28F008S5;
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fip->size += C302F_BNK_SIZE;
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osc = fip->sector_count;
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fip->sector_count += C302F_BNK_NBLOCKS;
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if ((nsc = fip->sector_count) >= CONFIG_SYS_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 = C302F_BNK_ADDR_NEXT_BLK(addrb);
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}
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addr = C302F_BNK_ADDR_NEXT_BNK(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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c302f_reset(flash_info_t *info, int sect)
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{
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c302f_addr_t addrw, eaddrw;
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addrw = (c302f_addr_t)info->start[sect];
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eaddrw = C302F_BNK_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 = C302F_BNK_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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c302f_erase_init(flash_info_t *info, int sect)
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{
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c302f_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 C302F_BNK_CMD_PROG\n", C302F_BNK_CMD_PROG);
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printf("0x%08lx C302F_BNK_CMD_ERASE1\n", C302F_BNK_CMD_ERASE1);
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printf("0x%08lx C302F_BNK_CMD_ERASE2\n", C302F_BNK_CMD_ERASE2);
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printf("0x%08lx C302F_BNK_CMD_CLR_STAT\n", C302F_BNK_CMD_CLR_STAT);
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printf("0x%08lx C302F_BNK_CMD_RST\n", C302F_BNK_CMD_RST);
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printf("0x%08lx C302F_BNK_STAT_RDY\n", C302F_BNK_STAT_RDY);
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printf("0x%08lx C302F_BNK_STAT_ERR\n", C302F_BNK_STAT_ERR);
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#endif
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saddrw = (c302f_addr_t)info->start[sect];
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eaddrw = C302F_BNK_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 = C302F_BNK_CMD_ERASE1;
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*addrw = C302F_BNK_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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c302f_erase_poll(flash_info_t *info, int sect)
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{
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c302f_addr_t addrw, saddrw, eaddrw;
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int sectdone, haderr;
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saddrw = (c302f_addr_t)info->start[sect];
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eaddrw = C302F_BNK_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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c302f_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 & C302F_BNK_STAT_RDY) != C302F_BNK_STAT_RDY)
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sectdone = 0;
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else if ((stat & C302F_BNK_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 = C302F_BNK_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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c302f_write_word(c302f_addr_t addr, c302f_word_t value)
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{
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c302f_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 = C302F_BNK_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) > CONFIG_SYS_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 & C302F_BNK_STAT_RDY) != C302F_BNK_STAT_RDY);
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if ((stat & C302F_BNK_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 = C302F_BNK_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 = C302F_BNK_CMD_RST;
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return (retval);
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}
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#endif /* CONFIG_CMA302 */
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unsigned long
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flash_init(void)
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{
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unsigned long total;
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int i;
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flash_info_t *fip;
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/* Init: no FLASHes known */
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for (i=0; i<CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
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flash_info[i].flash_id = FLASH_UNKNOWN;
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}
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fip = &flash_info[0];
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total = 0L;
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#if defined(CONFIG_CMA302)
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c302f_probe(fip, (c302f_addr_t)CONFIG_SYS_FLASH_BASE);
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total += fip->size;
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fip++;
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#endif
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#if (CMA_MB_CAPS & CMA_MB_CAP_FLASH)
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/* not yet ...
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cmbf_probe(fip, (cmbf_addr_t)CMA_MB_FLASH_BASE);
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total += fip->size;
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fip++;
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*/
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#endif
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/*
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* protect monitor and environment sectors
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*/
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#if CONFIG_SYS_MONITOR_BASE == CONFIG_SYS_FLASH_BASE
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flash_protect(FLAG_PROTECT_SET,
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CONFIG_SYS_MONITOR_BASE,
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CONFIG_SYS_MONITOR_BASE+monitor_flash_len-1,
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&flash_info[0]);
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#endif
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#ifdef CONFIG_ENV_IS_IN_FLASH
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/* ENV protection ON by default */
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flash_protect(FLAG_PROTECT_SET,
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CONFIG_ENV_ADDR,
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CONFIG_ENV_ADDR+CONFIG_ENV_SECT_SIZE-1,
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&flash_info[0]);
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#endif
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return total;
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}
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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_28F008S5: printf ("28F008S5\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 % 4) == 0)
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printf ("\n ");
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printf (" %2d - %08lX%s", i,
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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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*/
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/*
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* The following code cannot be run from FLASH!
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*/
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int
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flash_erase(flash_info_t *info, int s_first, int s_last)
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{
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int prot, sect, haderr;
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ulong start, now, last;
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void (*erase_init)(flash_info_t *, int);
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int (*erase_poll)(flash_info_t *, int);
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void (*reset)(flash_info_t *, int);
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int rcode = 0;
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#ifdef FLASH_DEBUG
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printf("\nflash_erase: erase %d sectors (%d to %d incl.) from\n"
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" Bank # %d: ", s_last - s_first + 1, s_first, s_last,
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(info - flash_info) + 1);
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flash_print_info(info);
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#endif
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if ((s_first < 0) || (s_first > s_last)) {
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if (info->flash_id == FLASH_UNKNOWN) {
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printf ("- missing\n");
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} else {
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printf ("- no sectors to erase\n");
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}
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return 1;
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}
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switch (info->flash_id) {
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#if defined(CONFIG_CMA302)
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case FLASH_MAN_INTEL|FLASH_28F008S5:
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erase_init = c302f_erase_init;
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erase_poll = c302f_erase_poll;
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reset = c302f_reset;
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break;
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#endif
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#if (CMA_MB_CAPS & CMA_MB_CAP_FLASH)
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case FLASH_MAN_INTEL|FLASH_28F800_B:
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case FLASH_MAN_AMD|FLASH_AM29F800B:
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/* not yet ...
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erase_init = cmbf_erase_init;
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erase_poll = cmbf_erase_poll;
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reset = cmbf_reset;
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break;
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*/
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#endif
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default:
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printf ("Flash type %08lx not supported - aborted\n",
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info->flash_id);
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return 1;
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}
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prot = 0;
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for (sect=s_first; sect<=s_last; ++sect) {
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if (info->protect[sect]) {
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prot++;
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}
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}
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if (prot) {
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printf("- Warning: %d protected sector%s will not be erased!\n",
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prot, (prot > 1 ? "s" : ""));
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}
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start = get_timer (0);
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last = 0;
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haderr = 0;
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for (sect = s_first; sect <= s_last; sect++) {
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if (info->protect[sect] == 0) { /* not protected */
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ulong estart;
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int sectdone;
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(*erase_init)(info, sect);
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/* wait at least 80us - let's wait 1 ms */
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udelay (1000);
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estart = get_timer(start);
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do {
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now = get_timer(start);
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if (now - estart > CONFIG_SYS_FLASH_ERASE_TOUT) {
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printf ("Timeout (sect %d)\n", sect);
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haderr = 1;
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break;
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}
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#ifndef FLASH_DEBUG
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/* show that we're waiting */
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if ((now - last) > 1000) { /* every second */
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putc ('.');
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last = now;
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}
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#endif
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sectdone = (*erase_poll)(info, sect);
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if (sectdone < 0) {
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haderr = 1;
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break;
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}
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} while (!sectdone);
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if (haderr)
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break;
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}
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}
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if (haderr > 0) {
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printf (" failed\n");
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rcode = 1;
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}
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else
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printf (" done\n");
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/* reset to read mode */
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for (sect = s_first; sect <= s_last; sect++) {
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if (info->protect[sect] == 0) { /* not protected */
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(*reset)(info, sect);
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}
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}
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return rcode;
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}
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/*-----------------------------------------------------------------------
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* Copy memory to flash, returns:
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* 0 - OK
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* 1 - write timeout
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* 2 - Flash not erased
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* 3 - write error
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*/
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int
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write_buff(flash_info_t *info, uchar *src, ulong addr, ulong cnt)
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{
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ulong cp, wp, data;
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int i, l, rc;
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ulong start, now, last;
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wp = (addr & ~3); /* get lower word aligned address */
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/*
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* handle unaligned start bytes
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*/
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if ((l = addr - wp) != 0) {
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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
|
|
*/
|
|
start = get_timer (0);
|
|
last = 0;
|
|
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;
|
|
|
|
/* show that we're waiting */
|
|
now = get_timer(start);
|
|
if ((now - last) > 1000) { /* every second */
|
|
putc ('.');
|
|
last = now;
|
|
}
|
|
}
|
|
|
|
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
|
|
* 3 - write error
|
|
*/
|
|
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);
|
|
}
|
|
|
|
switch (info->flash_id) {
|
|
|
|
#if defined(CONFIG_CMA302)
|
|
case FLASH_MAN_INTEL|FLASH_28F008S5:
|
|
retval = c302f_write_word((c302f_addr_t)dest, (c302f_word_t)data);
|
|
break;
|
|
#endif
|
|
|
|
#if (CMA_MB_CAPS & CMA_MB_CAP_FLASH)
|
|
case FLASH_MAN_INTEL|FLASH_28F800_B:
|
|
case FLASH_MAN_AMD|FLASH_AM29F800B:
|
|
/* not yet ...
|
|
retval = cmbf_write_word((cmbf_addr_t)dest, (cmbf_word_t)data);
|
|
*/
|
|
retval = 3;
|
|
break;
|
|
#endif
|
|
|
|
default:
|
|
printf ("Flash type %08lx not supported - aborted\n",
|
|
info->flash_id);
|
|
retval = 3;
|
|
break;
|
|
}
|
|
|
|
return (retval);
|
|
}
|
|
|
|
/*-----------------------------------------------------------------------
|
|
*/
|