505 lines
12 KiB
C
505 lines
12 KiB
C
/*
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* (C) Copyright 2002
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* Lineo, Inc. <www.lineo.com>
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* Bernhard Kuhn <bkuhn@lineo.com>
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*
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* (C) Copyright 2002
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* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
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* Alex Zuepke <azu@sysgo.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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ulong myflush(void);
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/* Flash Organization Structure */
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typedef struct OrgDef
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{
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unsigned int sector_number;
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unsigned int sector_size;
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} OrgDef;
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/* Flash Organizations */
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OrgDef OrgAT49BV16x4[] =
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{
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{ 8, 8*1024 }, /* 8 * 8 kBytes sectors */
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{ 2, 32*1024 }, /* 2 * 32 kBytes sectors */
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{ 30, 64*1024 }, /* 30 * 64 kBytes sectors */
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};
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OrgDef OrgAT49BV16x4A[] =
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{
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{ 8, 8*1024 }, /* 8 * 8 kBytes sectors */
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{ 31, 64*1024 }, /* 31 * 64 kBytes sectors */
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};
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OrgDef OrgAT49BV6416[] =
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{
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{ 8, 8*1024 }, /* 8 * 8 kBytes sectors */
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{ 127, 64*1024 }, /* 127 * 64 kBytes sectors */
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};
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flash_info_t flash_info[CFG_MAX_FLASH_BANKS];
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/* AT49BV1614A Codes */
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#define FLASH_CODE1 0xAA
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#define FLASH_CODE2 0x55
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#define ID_IN_CODE 0x90
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#define ID_OUT_CODE 0xF0
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#define CMD_READ_ARRAY 0x00F0
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#define CMD_UNLOCK1 0x00AA
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#define CMD_UNLOCK2 0x0055
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#define CMD_ERASE_SETUP 0x0080
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#define CMD_ERASE_CONFIRM 0x0030
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#define CMD_PROGRAM 0x00A0
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#define CMD_UNLOCK_BYPASS 0x0020
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#define CMD_SECTOR_UNLOCK 0x0070
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#define MEM_FLASH_ADDR1 (*(volatile u16 *)(CFG_FLASH_BASE + (0x00005555<<1)))
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#define MEM_FLASH_ADDR2 (*(volatile u16 *)(CFG_FLASH_BASE + (0x00002AAA<<1)))
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#define BIT_ERASE_DONE 0x0080
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#define BIT_RDY_MASK 0x0080
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#define BIT_PROGRAM_ERROR 0x0020
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#define BIT_TIMEOUT 0x80000000 /* our flag */
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#define READY 1
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#define ERR 2
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#define TMO 4
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/*-----------------------------------------------------------------------
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*/
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void flash_identification (flash_info_t * info)
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{
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volatile u16 manuf_code, device_code, add_device_code;
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MEM_FLASH_ADDR1 = FLASH_CODE1;
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MEM_FLASH_ADDR2 = FLASH_CODE2;
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MEM_FLASH_ADDR1 = ID_IN_CODE;
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manuf_code = *(volatile u16 *) CFG_FLASH_BASE;
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device_code = *(volatile u16 *) (CFG_FLASH_BASE + 2);
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add_device_code = *(volatile u16 *) (CFG_FLASH_BASE + (3 << 1));
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MEM_FLASH_ADDR1 = FLASH_CODE1;
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MEM_FLASH_ADDR2 = FLASH_CODE2;
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MEM_FLASH_ADDR1 = ID_OUT_CODE;
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/* Vendor type */
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info->flash_id = ATM_MANUFACT & FLASH_VENDMASK;
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printf ("Atmel: ");
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if ((device_code & FLASH_TYPEMASK) == (ATM_ID_BV1614 & FLASH_TYPEMASK)) {
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if ((add_device_code & FLASH_TYPEMASK) ==
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(ATM_ID_BV1614A & FLASH_TYPEMASK)) {
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info->flash_id |= ATM_ID_BV1614A & FLASH_TYPEMASK;
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printf ("AT49BV1614A (16Mbit)\n");
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} else { /* AT49BV1614 Flash */
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info->flash_id |= ATM_ID_BV1614 & FLASH_TYPEMASK;
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printf ("AT49BV1614 (16Mbit)\n");
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}
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} else if ((device_code & FLASH_TYPEMASK) == (ATM_ID_BV6416 & FLASH_TYPEMASK)) {
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info->flash_id |= ATM_ID_BV6416 & FLASH_TYPEMASK;
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printf ("AT49BV6416 (64Mbit)\n");
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}
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}
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ushort flash_number_sector(OrgDef *pOrgDef, unsigned int nb_blocks)
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{
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int i, nb_sectors = 0;
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for (i=0; i<nb_blocks; i++){
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nb_sectors += pOrgDef[i].sector_number;
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}
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return nb_sectors;
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}
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void flash_unlock_sector(flash_info_t * info, unsigned int sector)
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{
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volatile u16 *addr = (volatile u16 *) (info->start[sector]);
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MEM_FLASH_ADDR1 = CMD_UNLOCK1;
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*addr = CMD_SECTOR_UNLOCK;
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}
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ulong flash_init (void)
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{
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int i, j, k;
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unsigned int flash_nb_blocks, sector;
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unsigned int start_address;
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OrgDef *pOrgDef;
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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_identification (&flash_info[i]);
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if ((flash_info[i].flash_id & FLASH_TYPEMASK) ==
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(ATM_ID_BV1614 & FLASH_TYPEMASK)) {
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pOrgDef = OrgAT49BV16x4;
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flash_nb_blocks = sizeof (OrgAT49BV16x4) / sizeof (OrgDef);
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} else if ((flash_info[i].flash_id & FLASH_TYPEMASK) ==
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(ATM_ID_BV1614A & FLASH_TYPEMASK)){ /* AT49BV1614A Flash */
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pOrgDef = OrgAT49BV16x4A;
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flash_nb_blocks = sizeof (OrgAT49BV16x4A) / sizeof (OrgDef);
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} else if ((flash_info[i].flash_id & FLASH_TYPEMASK) ==
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(ATM_ID_BV6416 & FLASH_TYPEMASK)){ /* AT49BV6416 Flash */
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pOrgDef = OrgAT49BV6416;
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flash_nb_blocks = sizeof (OrgAT49BV6416) / sizeof (OrgDef);
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} else {
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flash_nb_blocks = 0;
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pOrgDef = OrgAT49BV16x4;
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}
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flash_info[i].sector_count = flash_number_sector(pOrgDef, flash_nb_blocks);
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memset (flash_info[i].protect, 0, flash_info[i].sector_count);
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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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sector = 0;
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start_address = flashbase;
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flash_info[i].size = 0;
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for (j = 0; j < flash_nb_blocks; j++) {
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for (k = 0; k < pOrgDef[j].sector_number; k++) {
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flash_info[i].start[sector++] = start_address;
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start_address += pOrgDef[j].sector_size;
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flash_info[i].size += pOrgDef[j].sector_size;
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}
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}
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size += flash_info[i].size;
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if ((flash_info[i].flash_id & FLASH_TYPEMASK) ==
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(ATM_ID_BV6416 & FLASH_TYPEMASK)){ /* AT49BV6416 Flash */
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/* Unlock all sectors at reset */
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for (j=0; j<flash_info[i].sector_count; j++){
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flash_unlock_sector(&flash_info[i], j);
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}
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}
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}
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/* Protect binary boot image */
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flash_protect (FLAG_PROTECT_SET,
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CFG_FLASH_BASE,
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CFG_FLASH_BASE + CFG_BOOT_SIZE - 1, &flash_info[0]);
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/* Protect environment variables */
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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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/* Protect U-Boot gzipped image */
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flash_protect (FLAG_PROTECT_SET,
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CFG_U_BOOT_BASE,
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CFG_U_BOOT_BASE + CFG_U_BOOT_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 (ATM_MANUFACT & FLASH_VENDMASK):
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printf ("Atmel: ");
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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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switch (info->flash_id & FLASH_TYPEMASK) {
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case (ATM_ID_BV1614 & FLASH_TYPEMASK):
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printf ("AT49BV1614 (16Mbit)\n");
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break;
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case (ATM_ID_BV1614A & FLASH_TYPEMASK):
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printf ("AT49BV1614A (16Mbit)\n");
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break;
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case (ATM_ID_BV6416 & FLASH_TYPEMASK):
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printf ("AT49BV6416 (64Mbit)\n");
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break;
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default:
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printf ("Unknown Chip Type\n");
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return;
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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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/*-----------------------------------------------------------------------
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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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ulong result;
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int iflag, cflag, prot, sect;
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int rc = ERR_OK;
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int chip1;
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/* first look for protection bits */
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if (info->flash_id == FLASH_UNKNOWN)
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return ERR_UNKNOWN_FLASH_TYPE;
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if ((s_first < 0) || (s_first > s_last)) {
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return ERR_INVAL;
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}
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if ((info->flash_id & FLASH_VENDMASK) !=
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(ATM_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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cflag = icache_status ();
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icache_disable ();
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iflag = disable_interrupts ();
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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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printf ("Erasing sector %2d ... ", 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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volatile u16 *addr = (volatile u16 *) (info->start[sect]);
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MEM_FLASH_ADDR1 = CMD_UNLOCK1;
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MEM_FLASH_ADDR2 = CMD_UNLOCK2;
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MEM_FLASH_ADDR1 = CMD_ERASE_SETUP;
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MEM_FLASH_ADDR1 = CMD_UNLOCK1;
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MEM_FLASH_ADDR2 = CMD_UNLOCK2;
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*addr = CMD_ERASE_CONFIRM;
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/* wait until flash is ready */
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chip1 = 0;
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do {
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result = *addr;
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/* check timeout */
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if (get_timer_masked () > CFG_FLASH_ERASE_TOUT) {
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MEM_FLASH_ADDR1 = CMD_READ_ARRAY;
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chip1 = TMO;
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break;
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}
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if (!chip1 && (result & 0xFFFF) & BIT_ERASE_DONE)
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chip1 = READY;
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} while (!chip1);
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MEM_FLASH_ADDR1 = CMD_READ_ARRAY;
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if (chip1 == ERR) {
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rc = ERR_PROG_ERROR;
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goto outahere;
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}
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if (chip1 == TMO) {
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rc = ERR_TIMOUT;
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goto outahere;
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}
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printf ("ok.\n");
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} else { /* it was protected */
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printf ("protected!\n");
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}
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}
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if (ctrlc ())
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printf ("User Interrupt!\n");
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outahere:
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/* allow flash to settle - wait 10 ms */
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udelay_masked (10000);
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if (iflag)
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enable_interrupts ();
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if (cflag)
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icache_enable ();
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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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volatile static int write_word (flash_info_t * info, ulong dest,
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ulong data)
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{
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volatile u16 *addr = (volatile u16 *) dest;
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ulong result;
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int rc = ERR_OK;
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int cflag, iflag;
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int chip1;
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/*
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* Check if Flash is (sufficiently) erased
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*/
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result = *addr;
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if ((result & data) != data)
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return ERR_NOT_ERASED;
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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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cflag = icache_status ();
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icache_disable ();
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iflag = disable_interrupts ();
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MEM_FLASH_ADDR1 = CMD_UNLOCK1;
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MEM_FLASH_ADDR2 = CMD_UNLOCK2;
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MEM_FLASH_ADDR1 = CMD_PROGRAM;
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*addr = data;
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/* arm simple, non interrupt dependent timer */
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reset_timer_masked ();
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/* wait until flash is ready */
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chip1 = 0;
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do {
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result = *addr;
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/* check timeout */
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if (get_timer_masked () > CFG_FLASH_ERASE_TOUT) {
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chip1 = ERR | TMO;
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break;
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}
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if (!chip1 && ((result & 0x80) == (data & 0x80)))
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chip1 = READY;
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} while (!chip1);
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*addr = CMD_READ_ARRAY;
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if (chip1 == ERR || *addr != data)
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rc = ERR_PROG_ERROR;
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if (iflag)
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enable_interrupts ();
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if (cflag)
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icache_enable ();
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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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int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
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{
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ulong wp, data;
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int rc;
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if (addr & 1) {
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printf ("unaligned destination not supported\n");
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return ERR_ALIGN;
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};
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if ((int) src & 1) {
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printf ("unaligned source not supported\n");
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return ERR_ALIGN;
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};
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wp = addr;
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while (cnt >= 2) {
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data = *((volatile u16 *) 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 == 1) {
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data = (*((volatile u8 *) src)) | (*((volatile u8 *) (wp + 1)) <<
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8);
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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 += 1;
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wp += 1;
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cnt -= 1;
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};
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return ERR_OK;
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}
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