mirror of
https://github.com/AsahiLinux/u-boot
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779 lines
20 KiB
C
779 lines
20 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 <mpc824x.h>
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#include <asm/processor.h>
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#include <asm/pci_io.h>
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#define ROM_CS0_START 0xFF800000
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#define ROM_CS1_START 0xFF000000
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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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#if 0
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static void flash_get_offsets (ulong base, flash_info_t * info);
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#endif /* 0 */
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/*flash command address offsets*/
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#if 0
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#define ADDR0 (0x555)
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#define ADDR1 (0x2AA)
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#define ADDR3 (0x001)
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#else
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#define ADDR0 (0xAAA)
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#define ADDR1 (0x555)
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#define ADDR3 (0x001)
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#endif
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#define FLASH_WORD_SIZE unsigned char
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/*-----------------------------------------------------------------------
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*/
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#if 0
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static int byte_parity_odd (unsigned char x) __attribute__ ((const));
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#endif /* 0 */
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static unsigned long flash_id (unsigned char mfct, unsigned char chip)
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__attribute__ ((const));
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typedef struct {
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FLASH_WORD_SIZE extval;
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unsigned short intval;
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} map_entry;
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#if 0
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static int byte_parity_odd (unsigned char x)
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{
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x ^= x >> 4;
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x ^= x >> 2;
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x ^= x >> 1;
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return (x & 0x1) != 0;
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}
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#endif /* 0 */
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static unsigned long flash_id (unsigned char mfct, unsigned char chip)
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{
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static const map_entry mfct_map[] = {
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{(FLASH_WORD_SIZE) AMD_MANUFACT,
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(unsigned short) ((unsigned long) FLASH_MAN_AMD >> 16)},
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{(FLASH_WORD_SIZE) FUJ_MANUFACT,
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(unsigned short) ((unsigned long) FLASH_MAN_FUJ >> 16)},
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{(FLASH_WORD_SIZE) STM_MANUFACT,
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(unsigned short) ((unsigned long) FLASH_MAN_STM >> 16)},
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{(FLASH_WORD_SIZE) MT_MANUFACT,
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(unsigned short) ((unsigned long) FLASH_MAN_MT >> 16)},
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{(FLASH_WORD_SIZE) INTEL_MANUFACT,
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(unsigned short) ((unsigned long) FLASH_MAN_INTEL >> 16)},
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{(FLASH_WORD_SIZE) INTEL_ALT_MANU,
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(unsigned short) ((unsigned long) FLASH_MAN_INTEL >> 16)}
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};
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static const map_entry chip_map[] = {
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{AMD_ID_F040B, FLASH_AM040},
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{(FLASH_WORD_SIZE) STM_ID_x800AB, FLASH_STM800AB}
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};
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const map_entry *p;
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unsigned long result = FLASH_UNKNOWN;
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/* find chip id */
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for (p = &chip_map[0];
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p < &chip_map[sizeof chip_map / sizeof chip_map[0]]; p++)
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if (p->extval == chip) {
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result = FLASH_VENDMASK | p->intval;
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break;
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}
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/* find vendor id */
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for (p = &mfct_map[0];
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p < &mfct_map[sizeof mfct_map / sizeof mfct_map[0]]; p++)
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if (p->extval == mfct) {
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result &= ~FLASH_VENDMASK;
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result |= (unsigned long) p->intval << 16;
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break;
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}
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return result;
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}
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unsigned long flash_init (void)
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{
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unsigned long i;
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unsigned char j;
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static const ulong flash_banks[] = CONFIG_SYS_FLASH_BANKS;
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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_t *const pflinfo = &flash_info[i];
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pflinfo->flash_id = FLASH_UNKNOWN;
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pflinfo->size = 0;
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pflinfo->sector_count = 0;
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}
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for (i = 0; i < sizeof flash_banks / sizeof flash_banks[0]; i++) {
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flash_info_t *const pflinfo = &flash_info[i];
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const unsigned long base_address = flash_banks[i];
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volatile FLASH_WORD_SIZE *const flash =
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(FLASH_WORD_SIZE *) base_address;
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#if 0
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volatile FLASH_WORD_SIZE *addr2;
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#endif
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#if 0
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/* write autoselect sequence */
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flash[0x5555] = 0xaa;
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flash[0x2aaa] = 0x55;
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flash[0x5555] = 0x90;
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#else
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flash[0xAAA << (3 * i)] = 0xaa;
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flash[0x555 << (3 * i)] = 0x55;
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flash[0xAAA << (3 * i)] = 0x90;
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#endif
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__asm__ __volatile__ ("sync");
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#if 0
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pflinfo->flash_id = flash_id (flash[0x0], flash[0x1]);
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#else
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pflinfo->flash_id =
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flash_id (flash[0x0], flash[0x2 + 14 * i]);
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#endif
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switch (pflinfo->flash_id & FLASH_TYPEMASK) {
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case FLASH_AM040:
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pflinfo->size = 0x00080000;
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pflinfo->sector_count = 8;
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for (j = 0; j < 8; j++) {
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pflinfo->start[j] =
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base_address + 0x00010000 * j;
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pflinfo->protect[j] = flash[(j << 16) | 0x2];
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}
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break;
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case FLASH_STM800AB:
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pflinfo->size = 0x00100000;
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pflinfo->sector_count = 19;
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pflinfo->start[0] = base_address;
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pflinfo->start[1] = base_address + 0x4000;
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pflinfo->start[2] = base_address + 0x6000;
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pflinfo->start[3] = base_address + 0x8000;
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for (j = 1; j < 16; j++) {
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pflinfo->start[j + 3] =
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base_address + 0x00010000 * j;
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}
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#if 0
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/* check for protected sectors */
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for (j = 0; j < pflinfo->sector_count; j++) {
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/* read sector protection at sector address, (A7 .. A0) = 0x02 */
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/* D0 = 1 if protected */
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addr2 = (volatile FLASH_WORD_SIZE
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*) (pflinfo->start[j]);
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if (pflinfo->flash_id & FLASH_MAN_SST)
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pflinfo->protect[j] = 0;
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else
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pflinfo->protect[j] = addr2[2] & 1;
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}
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#endif
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break;
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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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#if defined(CONFIG_ENV_IS_IN_FLASH) && defined(CONFIG_ENV_ADDR)
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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_SIZE - 1,
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&flash_info[0]);
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#endif
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/* reset device to read mode */
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flash[0x0000] = 0xf0;
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__asm__ __volatile__ ("sync");
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}
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return flash_info[0].size + flash_info[1].size;
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}
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#if 0
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static void 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 address table */
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if (info->flash_id & FLASH_MAN_SST) {
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for (i = 0; i < info->sector_count; i++)
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info->start[i] = base + (i * 0x00010000);
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} else 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 + 0x00004000;
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info->start[2] = base + 0x00006000;
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info->start[3] = base + 0x00008000;
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for (i = 4; i < info->sector_count; i++) {
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info->start[i] = base + (i * 0x00010000) - 0x00030000;
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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 - 0x00004000;
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info->start[i--] = base + info->size - 0x00006000;
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info->start[i--] = base + info->size - 0x00008000;
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for (; i >= 0; i--) {
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info->start[i] = base + i * 0x00010000;
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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 flash_print_info (flash_info_t * info)
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{
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static const char unk[] = "Unknown";
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const char *mfct = unk, *type = unk;
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unsigned int i;
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if (info->flash_id != FLASH_UNKNOWN) {
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switch (info->flash_id & FLASH_VENDMASK) {
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case FLASH_MAN_AMD:
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mfct = "AMD";
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break;
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case FLASH_MAN_FUJ:
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mfct = "FUJITSU";
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break;
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case FLASH_MAN_STM:
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mfct = "STM";
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break;
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case FLASH_MAN_SST:
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mfct = "SST";
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break;
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case FLASH_MAN_BM:
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mfct = "Bright Microelectonics";
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break;
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case FLASH_MAN_INTEL:
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mfct = "Intel";
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break;
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}
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switch (info->flash_id & FLASH_TYPEMASK) {
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case FLASH_AM040:
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type = "AM29F040B (512K * 8, uniform sector size)";
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break;
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case FLASH_AM400B:
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type = "AM29LV400B (4 Mbit, bottom boot sect)";
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break;
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case FLASH_AM400T:
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type = "AM29LV400T (4 Mbit, top boot sector)";
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break;
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case FLASH_AM800B:
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type = "AM29LV800B (8 Mbit, bottom boot sect)";
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break;
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case FLASH_AM800T:
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type = "AM29LV800T (8 Mbit, top boot sector)";
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break;
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case FLASH_AM160T:
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type = "AM29LV160T (16 Mbit, top boot sector)";
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break;
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case FLASH_AM320B:
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type = "AM29LV320B (32 Mbit, bottom boot sect)";
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break;
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case FLASH_AM320T:
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type = "AM29LV320T (32 Mbit, top boot sector)";
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break;
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case FLASH_STM800AB:
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type = "M29W800AB (8 Mbit, bottom boot sect)";
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break;
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case FLASH_SST800A:
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type = "SST39LF/VF800 (8 Mbit, uniform sector size)";
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break;
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case FLASH_SST160A:
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type = "SST39LF/VF160 (16 Mbit, uniform sector size)";
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break;
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}
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}
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printf ("\n Brand: %s Type: %s\n"
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" Size: %lu KB in %d Sectors\n",
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mfct, type, info->size >> 10, 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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unsigned long size;
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unsigned int erased;
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unsigned long *flash = (unsigned long *) info->start[i];
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/*
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* Check if whole sector is erased
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*/
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size = (i != (info->sector_count - 1)) ?
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(info->start[i + 1] - info->start[i]) >> 2 :
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(info->start[0] + info->size - info->start[i]) >> 2;
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for (flash = (unsigned long *) info->start[i], erased = 1;
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(flash != (unsigned long *) info->start[i] + size)
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&& erased; flash++)
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erased = *flash == ~0x0UL;
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printf ("%s %08lX %s %s",
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(i % 5) ? "" : "\n ",
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info->start[i],
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erased ? "E" : " ", info->protect[i] ? "RO" : " ");
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}
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puts ("\n");
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return;
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}
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#if 0
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/*
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* The following code cannot be run from FLASH!
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*/
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ulong flash_get_size (vu_long * addr, flash_info_t * info)
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{
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short i;
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FLASH_WORD_SIZE value;
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ulong base = (ulong) addr;
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volatile FLASH_WORD_SIZE *addr2 = (FLASH_WORD_SIZE *) addr;
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printf ("flash_get_size: \n");
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/* Write auto select command: read Manufacturer ID */
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eieio ();
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addr2[ADDR0] = (FLASH_WORD_SIZE) 0xAA;
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addr2[ADDR1] = (FLASH_WORD_SIZE) 0x55;
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addr2[ADDR0] = (FLASH_WORD_SIZE) 0x90;
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value = addr2[0];
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switch (value) {
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case (FLASH_WORD_SIZE) AMD_MANUFACT:
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info->flash_id = FLASH_MAN_AMD;
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break;
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case (FLASH_WORD_SIZE) FUJ_MANUFACT:
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info->flash_id = FLASH_MAN_FUJ;
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break;
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case (FLASH_WORD_SIZE) SST_MANUFACT:
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info->flash_id = FLASH_MAN_SST;
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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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printf ("recognised manufacturer");
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value = addr2[ADDR3]; /* device ID */
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debug ("\ndev_code=%x\n", value);
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switch (value) {
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case (FLASH_WORD_SIZE) 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 = 0x00080000;
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break; /* => 0.5 MB */
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case (FLASH_WORD_SIZE) 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 = 0x00080000;
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break; /* => 0.5 MB */
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case (FLASH_WORD_SIZE) 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 = 0x00100000;
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break; /* => 1 MB */
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case (FLASH_WORD_SIZE) 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 = 0x00100000;
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break; /* => 1 MB */
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case (FLASH_WORD_SIZE) 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 = 0x00200000;
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break; /* => 2 MB */
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case (FLASH_WORD_SIZE) AMD_ID_LV160B:
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info->flash_id += FLASH_AM160B;
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info->sector_count = 35;
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info->size = 0x00200000;
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break; /* => 2 MB */
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case (FLASH_WORD_SIZE) SST_ID_xF800A:
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info->flash_id += FLASH_SST800A;
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info->sector_count = 16;
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info->size = 0x00100000;
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break; /* => 1 MB */
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case (FLASH_WORD_SIZE) SST_ID_xF160A:
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info->flash_id += FLASH_SST160A;
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info->sector_count = 32;
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info->size = 0x00200000;
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break; /* => 2 MB */
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case (FLASH_WORD_SIZE) AMD_ID_F040B:
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info->flash_id += FLASH_AM040;
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info->sector_count = 8;
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info->size = 0x00080000;
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break; /* => 0.5 MB */
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default:
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info->flash_id = FLASH_UNKNOWN;
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return (0); /* => no or unknown flash */
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}
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printf ("flash id %lx; sector count %x, size %lx\n", info->flash_id,
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info->sector_count, info->size);
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/* set up sector start address table */
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if (info->flash_id & FLASH_MAN_SST) {
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for (i = 0; i < info->sector_count; i++)
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info->start[i] = base + (i * 0x00010000);
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} else 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 + 0x00004000;
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info->start[2] = base + 0x00006000;
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info->start[3] = base + 0x00008000;
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for (i = 4; i < info->sector_count; i++) {
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info->start[i] = base + (i * 0x00010000) - 0x00030000;
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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 - 0x00004000;
|
|
info->start[i--] = base + info->size - 0x00006000;
|
|
info->start[i--] = base + info->size - 0x00008000;
|
|
for (; i >= 0; i--) {
|
|
info->start[i] = base + i * 0x00010000;
|
|
}
|
|
}
|
|
|
|
/* check for protected sectors */
|
|
for (i = 0; i < info->sector_count; i++) {
|
|
/* read sector protection at sector address, (A7 .. A0) = 0x02 */
|
|
/* D0 = 1 if protected */
|
|
addr2 = (volatile FLASH_WORD_SIZE *) (info->start[i]);
|
|
if (info->flash_id & FLASH_MAN_SST)
|
|
info->protect[i] = 0;
|
|
else
|
|
info->protect[i] = addr2[2] & 1;
|
|
}
|
|
|
|
/*
|
|
* Prevent writes to uninitialized FLASH.
|
|
*/
|
|
if (info->flash_id != FLASH_UNKNOWN) {
|
|
addr2 = (FLASH_WORD_SIZE *) info->start[0];
|
|
*addr2 = (FLASH_WORD_SIZE) 0x00F000F0; /* reset bank */
|
|
}
|
|
|
|
return (info->size);
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
int flash_erase (flash_info_t * info, int s_first, int s_last)
|
|
{
|
|
volatile FLASH_WORD_SIZE *addr = (FLASH_WORD_SIZE *) (info->start[0]);
|
|
int flag, prot, sect, l_sect;
|
|
ulong start, now, last;
|
|
unsigned char sh8b;
|
|
|
|
if ((s_first < 0) || (s_first > s_last)) {
|
|
if (info->flash_id == FLASH_UNKNOWN) {
|
|
printf ("- missing\n");
|
|
} else {
|
|
printf ("- no sectors to erase\n");
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
if ((info->flash_id == FLASH_UNKNOWN) ||
|
|
(info->flash_id > (FLASH_MAN_STM | FLASH_AMD_COMP))) {
|
|
printf ("Can't erase unknown flash type - aborted\n");
|
|
return 1;
|
|
}
|
|
|
|
prot = 0;
|
|
for (sect = s_first; sect <= s_last; ++sect) {
|
|
if (info->protect[sect]) {
|
|
prot++;
|
|
}
|
|
}
|
|
|
|
if (prot) {
|
|
printf ("- Warning: %d protected sectors will not be erased!\n", prot);
|
|
} else {
|
|
printf ("\n");
|
|
}
|
|
|
|
l_sect = -1;
|
|
|
|
/* Check the ROM CS */
|
|
if ((info->start[0] >= ROM_CS1_START)
|
|
&& (info->start[0] < ROM_CS0_START))
|
|
sh8b = 3;
|
|
else
|
|
sh8b = 0;
|
|
|
|
/* Disable interrupts which might cause a timeout here */
|
|
flag = disable_interrupts ();
|
|
|
|
addr[ADDR0 << sh8b] = (FLASH_WORD_SIZE) 0x00AA00AA;
|
|
addr[ADDR1 << sh8b] = (FLASH_WORD_SIZE) 0x00550055;
|
|
addr[ADDR0 << sh8b] = (FLASH_WORD_SIZE) 0x00800080;
|
|
addr[ADDR0 << sh8b] = (FLASH_WORD_SIZE) 0x00AA00AA;
|
|
addr[ADDR1 << sh8b] = (FLASH_WORD_SIZE) 0x00550055;
|
|
|
|
/* Start erase on unprotected sectors */
|
|
for (sect = s_first; sect <= s_last; sect++) {
|
|
if (info->protect[sect] == 0) { /* not protected */
|
|
addr = (FLASH_WORD_SIZE *) (info->start[0] + ((info->
|
|
start
|
|
[sect]
|
|
-
|
|
info->
|
|
start
|
|
[0]) <<
|
|
sh8b));
|
|
if (info->flash_id & FLASH_MAN_SST) {
|
|
addr[ADDR0 << sh8b] =
|
|
(FLASH_WORD_SIZE) 0x00AA00AA;
|
|
addr[ADDR1 << sh8b] =
|
|
(FLASH_WORD_SIZE) 0x00550055;
|
|
addr[ADDR0 << sh8b] =
|
|
(FLASH_WORD_SIZE) 0x00800080;
|
|
addr[ADDR0 << sh8b] =
|
|
(FLASH_WORD_SIZE) 0x00AA00AA;
|
|
addr[ADDR1 << sh8b] =
|
|
(FLASH_WORD_SIZE) 0x00550055;
|
|
addr[0] = (FLASH_WORD_SIZE) 0x00500050; /* block erase */
|
|
udelay (30000); /* wait 30 ms */
|
|
} else
|
|
addr[0] = (FLASH_WORD_SIZE) 0x00300030; /* sector erase */
|
|
l_sect = sect;
|
|
}
|
|
}
|
|
|
|
/* re-enable interrupts if necessary */
|
|
if (flag)
|
|
enable_interrupts ();
|
|
|
|
/* wait at least 80us - let's wait 1 ms */
|
|
udelay (1000);
|
|
|
|
/*
|
|
* We wait for the last triggered sector
|
|
*/
|
|
if (l_sect < 0)
|
|
goto DONE;
|
|
|
|
start = get_timer (0);
|
|
last = start;
|
|
addr = (FLASH_WORD_SIZE *) (info->start[0] + ((info->start[l_sect] -
|
|
info->
|
|
start[0]) << sh8b));
|
|
while ((addr[0] & (FLASH_WORD_SIZE) 0x00800080) !=
|
|
(FLASH_WORD_SIZE) 0x00800080) {
|
|
if ((now = get_timer (start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
|
|
printf ("Timeout\n");
|
|
return 1;
|
|
}
|
|
/* show that we're waiting */
|
|
if ((now - last) > 1000) { /* every second */
|
|
serial_putc ('.');
|
|
last = now;
|
|
}
|
|
}
|
|
|
|
DONE:
|
|
/* reset to read mode */
|
|
addr = (FLASH_WORD_SIZE *) info->start[0];
|
|
addr[0] = (FLASH_WORD_SIZE) 0x00F000F0; /* reset bank */
|
|
|
|
printf (" done\n");
|
|
return 0;
|
|
}
|
|
|
|
/*-----------------------------------------------------------------------
|
|
* Copy memory to flash, returns:
|
|
* 0 - OK
|
|
* 1 - write timeout
|
|
* 2 - Flash not erased
|
|
*/
|
|
|
|
int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
|
|
{
|
|
ulong cp, wp, data;
|
|
int i, l, rc;
|
|
|
|
wp = (addr & ~3); /* get lower word aligned address */
|
|
|
|
/*
|
|
* handle unaligned start bytes
|
|
*/
|
|
if ((l = addr - wp) != 0) {
|
|
data = 0;
|
|
for (i = 0, cp = wp; i < l; ++i, ++cp) {
|
|
data = (data << 8) | (*(uchar *) cp);
|
|
}
|
|
for (; i < 4 && cnt > 0; ++i) {
|
|
data = (data << 8) | *src++;
|
|
--cnt;
|
|
++cp;
|
|
}
|
|
for (; cnt == 0 && i < 4; ++i, ++cp) {
|
|
data = (data << 8) | (*(uchar *) cp);
|
|
}
|
|
|
|
if ((rc = write_word (info, wp, data)) != 0) {
|
|
return (rc);
|
|
}
|
|
wp += 4;
|
|
}
|
|
|
|
/*
|
|
* handle word aligned part
|
|
*/
|
|
while (cnt >= 4) {
|
|
data = 0;
|
|
for (i = 0; i < 4; ++i) {
|
|
data = (data << 8) | *src++;
|
|
}
|
|
if ((rc = write_word (info, wp, data)) != 0) {
|
|
return (rc);
|
|
}
|
|
wp += 4;
|
|
cnt -= 4;
|
|
}
|
|
|
|
if (cnt == 0) {
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* handle unaligned tail bytes
|
|
*/
|
|
data = 0;
|
|
for (i = 0, cp = wp; i < 4 && cnt > 0; ++i, ++cp) {
|
|
data = (data << 8) | *src++;
|
|
--cnt;
|
|
}
|
|
for (; i < 4; ++i, ++cp) {
|
|
data = (data << 8) | (*(uchar *) cp);
|
|
}
|
|
|
|
return (write_word (info, wp, data));
|
|
}
|
|
|
|
/*-----------------------------------------------------------------------
|
|
* Write a word to Flash, returns:
|
|
* 0 - OK
|
|
* 1 - write timeout
|
|
* 2 - Flash not erased
|
|
*/
|
|
static int write_word (flash_info_t * info, ulong dest, ulong data)
|
|
{
|
|
volatile FLASH_WORD_SIZE *addr2 = (FLASH_WORD_SIZE *) info->start[0];
|
|
volatile FLASH_WORD_SIZE *dest2;
|
|
volatile FLASH_WORD_SIZE *data2 = (FLASH_WORD_SIZE *) & data;
|
|
ulong start;
|
|
int flag;
|
|
int i;
|
|
unsigned char sh8b;
|
|
|
|
/* Check the ROM CS */
|
|
if ((info->start[0] >= ROM_CS1_START)
|
|
&& (info->start[0] < ROM_CS0_START))
|
|
sh8b = 3;
|
|
else
|
|
sh8b = 0;
|
|
|
|
dest2 = (FLASH_WORD_SIZE *) (((dest - info->start[0]) << sh8b) +
|
|
info->start[0]);
|
|
|
|
/* Check if Flash is (sufficiently) erased */
|
|
if ((*dest2 & (FLASH_WORD_SIZE) data) != (FLASH_WORD_SIZE) data) {
|
|
return (2);
|
|
}
|
|
/* Disable interrupts which might cause a timeout here */
|
|
flag = disable_interrupts ();
|
|
|
|
for (i = 0; i < 4 / sizeof (FLASH_WORD_SIZE); i++) {
|
|
addr2[ADDR0 << sh8b] = (FLASH_WORD_SIZE) 0x00AA00AA;
|
|
addr2[ADDR1 << sh8b] = (FLASH_WORD_SIZE) 0x00550055;
|
|
addr2[ADDR0 << sh8b] = (FLASH_WORD_SIZE) 0x00A000A0;
|
|
|
|
dest2[i << sh8b] = data2[i];
|
|
|
|
/* re-enable interrupts if necessary */
|
|
if (flag)
|
|
enable_interrupts ();
|
|
|
|
/* data polling for D7 */
|
|
start = get_timer (0);
|
|
while ((dest2[i << sh8b] & (FLASH_WORD_SIZE) 0x00800080) !=
|
|
(data2[i] & (FLASH_WORD_SIZE) 0x00800080)) {
|
|
if (get_timer (start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
|
|
return (1);
|
|
}
|
|
}
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*-----------------------------------------------------------------------
|
|
*/
|