mirror of
https://github.com/AsahiLinux/u-boot
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150 lines
4.5 KiB
C
150 lines
4.5 KiB
C
/*
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* (C) Copyright 2004-2005
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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*
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* (C) Copyright 2002 Jun Gu <jung@artesyncp.com>
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* Add support for Am29F016D and dynamic switch setting.
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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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/*
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* Modified 4/5/2001
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* Wait for completion of each sector erase command issued
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* 4/5/2001
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* Chris Hallinan - DS4.COM, Inc. - clh@net1plus.com
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*/
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#include <common.h>
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#include <ppc4xx.h>
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#include <asm/processor.h>
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#undef DEBUG
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#ifdef DEBUG
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#define DEBUGF(x...) printf(x)
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#else
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#define DEBUGF(x...)
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#endif /* DEBUG */
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#define BOOT_SMALL_FLASH 0x40 /* 01000000 */
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#define FLASH_ONBD_N 2 /* 00000010 */
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#define FLASH_SRAM_SEL 1 /* 00000001 */
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#define FLASH_ONBD_N 2 /* 00000010 */
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#define FLASH_SRAM_SEL 1 /* 00000001 */
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#define BOOT_SMALL_FLASH_VAL 4
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#define FLASH_ONBD_N_VAL 2
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#define FLASH_SRAM_SEL_VAL 1
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flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */
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static unsigned long flash_addr_table[8][CFG_MAX_FLASH_BANKS] = {
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{0xFF800000, 0xFF880000, 0xFFC00000}, /* 0:000: configuraton 4 */
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{0xFF900000, 0xFF980000, 0xFFC00000}, /* 1:001: configuraton 3 */
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{0x00000000, 0x00000000, 0x00000000}, /* 2:010: configuraton 8 */
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{0x00000000, 0x00000000, 0x00000000}, /* 3:011: configuraton 7 */
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{0xFFE00000, 0xFFF00000, 0xFF800000}, /* 4:100: configuraton 2 */
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{0xFFF00000, 0xFFF80000, 0xFF800000}, /* 5:101: configuraton 1 */
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{0x00000000, 0x00000000, 0x00000000}, /* 6:110: configuraton 6 */
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{0x00000000, 0x00000000, 0x00000000} /* 7:111: configuraton 5 */
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};
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/*
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* include common flash code (for amcc boards)
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*/
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#include "../common/flash.c"
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/*-----------------------------------------------------------------------
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* Functions
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*/
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static ulong flash_get_size(vu_long * addr, flash_info_t * info);
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static int write_word(flash_info_t * info, ulong dest, ulong data);
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/*-----------------------------------------------------------------------
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*/
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unsigned long flash_init(void)
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{
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unsigned long total_b = 0;
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unsigned long size_b[CFG_MAX_FLASH_BANKS];
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unsigned char *fpga_base = (unsigned char *)CFG_FPGA_BASE;
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unsigned char switch_status;
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unsigned short index = 0;
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int i;
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/* read FPGA base register FPGA_REG0 */
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switch_status = *fpga_base;
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/* check the bitmap of switch status */
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if (switch_status & BOOT_SMALL_FLASH) {
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index += BOOT_SMALL_FLASH_VAL;
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}
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if (switch_status & FLASH_ONBD_N) {
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index += FLASH_ONBD_N_VAL;
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}
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if (switch_status & FLASH_SRAM_SEL) {
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index += FLASH_SRAM_SEL_VAL;
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}
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DEBUGF("\n");
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DEBUGF("FLASH: Index: %d\n", index);
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/* Init: no FLASHes known */
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for (i = 0; i < CFG_MAX_FLASH_BANKS; ++i) {
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flash_info[i].flash_id = FLASH_UNKNOWN;
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flash_info[i].sector_count = -1;
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flash_info[i].size = 0;
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/* check whether the address is 0 */
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if (flash_addr_table[index][i] == 0) {
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continue;
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}
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/* call flash_get_size() to initialize sector address */
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size_b[i] =
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flash_get_size((vu_long *) flash_addr_table[index][i],
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&flash_info[i]);
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flash_info[i].size = size_b[i];
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if (flash_info[i].flash_id == FLASH_UNKNOWN) {
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printf
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("## Unknown FLASH on Bank %d - Size = 0x%08lx = %ld MB\n",
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i, size_b[i], size_b[i] << 20);
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flash_info[i].sector_count = -1;
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flash_info[i].size = 0;
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}
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/* Monitor protection ON by default */
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(void)flash_protect(FLAG_PROTECT_SET, CFG_MONITOR_BASE,
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CFG_MONITOR_BASE + CFG_MONITOR_LEN - 1,
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&flash_info[i]);
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#ifdef CFG_ENV_IS_IN_FLASH
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(void)flash_protect(FLAG_PROTECT_SET, CFG_ENV_ADDR,
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CFG_ENV_ADDR + CFG_ENV_SECT_SIZE - 1,
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&flash_info[i]);
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(void)flash_protect(FLAG_PROTECT_SET, CFG_ENV_ADDR_REDUND,
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CFG_ENV_ADDR_REDUND + CFG_ENV_SECT_SIZE - 1,
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&flash_info[i]);
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#endif
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total_b += flash_info[i].size;
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}
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return total_b;
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}
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