mirror of
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339 lines
8.0 KiB
C
339 lines
8.0 KiB
C
/*
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* (C) Copyright 2002
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* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
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* Marius Groeger <mgroeger@sysgo.de>
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*
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* (C) Copyright 2005 Rowel Atienza <rowel@diwalabs.com>
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* Flash driver for armadillo board HT1070
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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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#define FLASH_BANK_SIZE 0x400000
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/*value used by hermit is 0x200*/
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/*document says sector size is either 64k in low mem reg and 8k in high mem reg*/
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#define MAIN_SECT_SIZE 0x10000
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#define UNALIGNED_MASK (3)
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#define FL_WORD(addr) (*(volatile unsigned short*)(addr))
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#define FLASH_TIMEOUT 20000000
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flash_info_t flash_info[CFG_MAX_FLASH_BANKS];
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/*-----------------------------------------------------------------------
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*/
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ulong flash_init (void)
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{
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int i, j;
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ulong size = 0;
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for (i = 0; i < CFG_MAX_FLASH_BANKS; i++) {
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ulong flashbase = 0;
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flash_info[i].flash_id = (FUJ_MANUFACT & FLASH_VENDMASK);
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/*(INTEL_ID_28F128J3 & FLASH_TYPEMASK); */
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flash_info[i].size = FLASH_BANK_SIZE;
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flash_info[i].sector_count = CFG_MAX_FLASH_SECT;
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memset (flash_info[i].protect, 0, CFG_MAX_FLASH_SECT);
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if (i == 0)
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flashbase = PHYS_FLASH_1;
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else
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panic ("configured too many flash banks!\n");
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for (j = 0; j < flash_info[i].sector_count; j++) {
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flash_info[i].start[j] =
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flashbase + j * MAIN_SECT_SIZE;
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}
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size += flash_info[i].size;
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}
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/* Protect monitor and environment sectors
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*/
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flash_protect (FLAG_PROTECT_SET,
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CFG_FLASH_BASE,
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CFG_FLASH_BASE + monitor_flash_len - 1,
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&flash_info[0]);
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flash_protect (FLAG_PROTECT_SET,
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CFG_ENV_ADDR,
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CFG_ENV_ADDR + CFG_ENV_SIZE - 1, &flash_info[0]);
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return size;
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}
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/*-----------------------------------------------------------------------
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*/
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void flash_print_info (flash_info_t * info)
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{
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int i;
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switch (info->flash_id & FLASH_VENDMASK) {
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case (FUJ_MANUFACT & FLASH_VENDMASK):
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printf ("Fujitsu: ");
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break;
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default:
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printf ("Unknown Vendor ");
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break;
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}
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/*
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switch (info->flash_id & FLASH_TYPEMASK) {
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case (INTEL_ID_28F128J3 & FLASH_TYPEMASK):
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printf ("28F128J3 (128Mbit)\n");
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break;
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default:
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printf ("Unknown Chip Type\n");
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goto Done;
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break;
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}
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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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}
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printf (" %08lX%s", info->start[i],
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info->protect[i] ? " (RO)" : " ");
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}
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printf ("\n");
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/*
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Done: ;
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*/
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}
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/*
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* * Loop until both write state machines complete.
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* */
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static unsigned short flash_status_wait (unsigned long addr,
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unsigned short value)
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{
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unsigned short status;
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long timeout = FLASH_TIMEOUT;
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while (((status = (FL_WORD (addr))) != value) && timeout > 0) {
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timeout--;
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}
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return status;
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}
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/*
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* Loop until the Write State machine is ready, then do a full error
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* check. Clear status and leave the flash in Read Array mode; return
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* 0 for no error, -1 for error.
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*/
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static int flash_status_full_check (unsigned long addr, unsigned short value1,
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unsigned short value2)
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{
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unsigned short status1, status2;
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status1 = flash_status_wait (addr, value1);
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status2 = flash_status_wait (addr + 2, value2);
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return (status1 != value1 || status2 != value2) ? -1 : 0;
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}
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/*-----------------------------------------------------------------------
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*/
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int flash_erase (flash_info_t * info, int s_first, int s_last)
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{
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int flag, prot, sect;
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int rc = ERR_OK;
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unsigned long base;
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unsigned long addr;
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if ((info->flash_id & FLASH_VENDMASK) !=
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(FUJ_MANUFACT & FLASH_VENDMASK)) {
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return ERR_UNKNOWN_FLASH_VENDOR;
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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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return ERR_PROTECTED;
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/*
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* Disable interrupts which might cause a timeout
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* here. Remember that our exception vectors are
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* at address 0 in the flash, and we don't want a
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* (ticker) exception to happen while the flash
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* chip is in programming mode.
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*/
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flag = disable_interrupts ();
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printf ("Erasing %d sectors starting at sector %2d.\n"
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"This make take some time ... ",
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s_last - s_first, sect);
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/* Start erase on unprotected sectors */
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for (sect = s_first; sect <= s_last && !ctrlc (); sect++) {
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/* ARM simple, non interrupt dependent timer */
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reset_timer_masked ();
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if (info->protect[sect] == 0) { /* not protected */
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addr = sect * MAIN_SECT_SIZE;
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addr &= ~(unsigned long) UNALIGNED_MASK; /* word align */
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base = addr & 0xF0000000;
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FL_WORD (base + (0x555 << 1)) = 0xAA;
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FL_WORD (base + (0x2AA << 1)) = 0x55;
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FL_WORD (base + (0x555 << 1)) = 0x80;
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FL_WORD (base + (0x555 << 1)) = 0xAA;
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FL_WORD (base + (0x2AA << 1)) = 0x55;
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FL_WORD (addr) = 0x30;
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if (flash_status_full_check (addr, 0xFFFF, 0xFFFF))
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return ERR_PROTECTED;
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}
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}
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printf ("\nDone.\n");
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if (ctrlc ())
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printf ("User Interrupt!\n");
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/* allow flash to settle - wait 10 ms */
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udelay_masked (10000);
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if (flag)
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enable_interrupts ();
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return rc;
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}
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/*-----------------------------------------------------------------------
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* Copy memory to flash
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*/
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static int write_word (flash_info_t * info, ulong dest, ushort data)
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{
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int flag;
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unsigned long base;
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/* Check if Flash is (sufficiently) erased
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*/
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if ((FL_WORD (dest) & data) != data)
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return ERR_NOT_ERASED;
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/*if(dest & UNALIGNED_MASK) return ERR_ALIGN; */
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/*
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* Disable interrupts which might cause a timeout
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* here. Remember that our exception vectors are
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* at address 0 in the flash, and we don't want a
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* (ticker) exception to happen while the flash
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* chip is in programming mode.
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*/
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flag = disable_interrupts ();
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/* arm simple, non interrupt dependent timer */
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reset_timer_masked ();
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base = dest & 0xF0000000;
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FL_WORD (base + (0x555 << 1)) = 0xAA;
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FL_WORD (base + (0x2AA << 1)) = 0x55;
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FL_WORD (base + (0x555 << 1)) = 0xA0;
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FL_WORD (dest) = data;
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/*printf("writing 0x%p = 0x%x\n",dest,data); */
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if (flash_status_wait (dest, data) != data)
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return ERR_PROG_ERROR;
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if (flag)
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enable_interrupts ();
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return ERR_OK;
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}
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/*-----------------------------------------------------------------------
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* Copy memory to flash.
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*/
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int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
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{
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ulong cp, wp;
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ushort data;
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int l;
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int i, rc;
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wp = (addr & ~1); /* get lower word aligned address */
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printf ("Writing %lu short data to 0x%lx from 0x%p.\n ", cnt, wp, src);
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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;
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for (i = 0, cp = wp; i < l; ++i, ++cp) {
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data = (data >> 8) | (*(uchar *) cp << 8);
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}
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for (; i < 2 && cnt > 0; ++i) {
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data = (data >> 8) | (*src++ << 8);
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--cnt;
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++cp;
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}
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for (; cnt == 0 && i < 2; ++i, ++cp) {
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data = (data >> 8) | (*(uchar *) cp << 8);
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}
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if ((rc = write_word (info, wp, data)) != 0) {
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return (rc);
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}
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wp += 2;
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}
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/*
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* handle word aligned part
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*/
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while (cnt >= 2) {
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data = *((vu_short *) src);
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if ((rc = write_word (info, wp, data)) != 0) {
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return (rc);
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}
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src += 2;
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wp += 2;
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cnt -= 2;
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}
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if (cnt == 0) {
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printf ("\nDone.\n");
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return ERR_OK;
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}
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/*
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* handle unaligned tail bytes
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*/
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data = 0;
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for (i = 0, cp = wp; i < 2 && cnt > 0; ++i, ++cp) {
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data = (data >> 8) | (*src++ << 8);
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--cnt;
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}
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for (; i < 2; ++i, ++cp) {
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data = (data >> 8) | (*(uchar *) cp << 8);
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}
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return write_word (info, wp, data);
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}
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