diff options
Diffstat (limited to 'board/Marvell/common/intel_flash.c')
| -rw-r--r-- | board/Marvell/common/intel_flash.c | 269 |
1 files changed, 269 insertions, 0 deletions
diff --git a/board/Marvell/common/intel_flash.c b/board/Marvell/common/intel_flash.c new file mode 100644 index 0000000..d26f883 --- /dev/null +++ b/board/Marvell/common/intel_flash.c @@ -0,0 +1,269 @@ +/* + * (C) Copyright 2000 + * 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 + * + * Hacked for the marvell db64360 eval board by + * Ingo Assmus <ingo.assmus@keymile.com> + */ + +#include <common.h> +#include <mpc8xx.h> +#include "../include/mv_gen_reg.h" +#include "../include/memory.h" +#include "intel_flash.h" + + +/*----------------------------------------------------------------------- + * Protection Flags: + */ +#define FLAG_PROTECT_SET 0x01 +#define FLAG_PROTECT_CLEAR 0x02 + +static void bank_reset (flash_info_t * info, int sect) +{ + bank_addr_t addrw, eaddrw; + + addrw = (bank_addr_t) info->start[sect]; + eaddrw = BANK_ADDR_NEXT_WORD (addrw); + + while (addrw < eaddrw) { +#ifdef FLASH_DEBUG + printf (" writing reset cmd to addr 0x%08lx\n", + (unsigned long) addrw); +#endif + *addrw = BANK_CMD_RST; + addrw++; + } +} + +static void bank_erase_init (flash_info_t * info, int sect) +{ + bank_addr_t addrw, saddrw, eaddrw; + int flag; + +#ifdef FLASH_DEBUG + printf ("0x%08x BANK_CMD_PROG\n", BANK_CMD_PROG); + printf ("0x%08x BANK_CMD_ERASE1\n", BANK_CMD_ERASE1); + printf ("0x%08x BANK_CMD_ERASE2\n", BANK_CMD_ERASE2); + printf ("0x%08x BANK_CMD_CLR_STAT\n", BANK_CMD_CLR_STAT); + printf ("0x%08x BANK_CMD_RST\n", BANK_CMD_RST); + printf ("0x%08x BANK_STAT_RDY\n", BANK_STAT_RDY); + printf ("0x%08x BANK_STAT_ERR\n", BANK_STAT_ERR); +#endif + + saddrw = (bank_addr_t) info->start[sect]; + eaddrw = BANK_ADDR_NEXT_WORD (saddrw); + +#ifdef FLASH_DEBUG + printf ("erasing sector %d, start addr = 0x%08lx " + "(bank next word addr = 0x%08lx)\n", sect, + (unsigned long) saddrw, (unsigned long) eaddrw); +#endif + + /* Disable intrs which might cause a timeout here */ + flag = disable_interrupts (); + + for (addrw = saddrw; addrw < eaddrw; addrw++) { +#ifdef FLASH_DEBUG + printf (" writing erase cmd to addr 0x%08lx\n", + (unsigned long) addrw); +#endif + *addrw = BANK_CMD_ERASE1; + *addrw = BANK_CMD_ERASE2; + } + + /* re-enable interrupts if necessary */ + if (flag) + enable_interrupts (); +} + +static int bank_erase_poll (flash_info_t * info, int sect) +{ + bank_addr_t addrw, saddrw, eaddrw; + int sectdone, haderr; + + saddrw = (bank_addr_t) info->start[sect]; + eaddrw = BANK_ADDR_NEXT_WORD (saddrw); + + sectdone = 1; + haderr = 0; + + for (addrw = saddrw; addrw < eaddrw; addrw++) { + bank_word_t stat = *addrw; + +#ifdef FLASH_DEBUG + printf (" checking status at addr " + "0x%08x [0x%08x]\n", (unsigned long) addrw, stat); +#endif + if ((stat & BANK_STAT_RDY) != BANK_STAT_RDY) + sectdone = 0; + else if ((stat & BANK_STAT_ERR) != 0) { + printf (" failed on sector %d " + "(stat = 0x%08x) at " + "address 0x%p\n", sect, stat, addrw); + *addrw = BANK_CMD_CLR_STAT; + haderr = 1; + } + } + + if (haderr) + return (-1); + else + return (sectdone); +} + +int write_word_intel (bank_addr_t addr, bank_word_t value) +{ + bank_word_t stat; + ulong start; + int flag, retval; + + /* Disable interrupts which might cause a timeout here */ + flag = disable_interrupts (); + + *addr = BANK_CMD_PROG; + + *addr = value; + + /* re-enable interrupts if necessary */ + if (flag) + enable_interrupts (); + + retval = 0; + + /* data polling for D7 */ + start = get_timer (0); + do { + if (get_timer (start) > CFG_FLASH_WRITE_TOUT) { + retval = 1; + goto done; + } + stat = *addr; + } while ((stat & BANK_STAT_RDY) != BANK_STAT_RDY); + + if ((stat & BANK_STAT_ERR) != 0) { + printf ("flash program failed (stat = 0x%08lx) " + "at address 0x%08lx\n", (ulong) stat, (ulong) addr); + *addr = BANK_CMD_CLR_STAT; + retval = 3; + } + + done: + /* reset to read mode */ + *addr = BANK_CMD_RST; + + return (retval); +} + +/*----------------------------------------------------------------------- + */ + +int flash_erase_intel (flash_info_t * info, int s_first, int s_last) +{ + int prot, sect, haderr; + ulong start, now, last; + +#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; + 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; + 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 haderr; +} |