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https://github.com/brain-hackers/u-boot-brain
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![wdenk](/assets/img/avatar_default.png)
- fix spelling errors - set GD_FLG_DEVINIT flag only after device function pointers are valid - Allow CFG_ALT_MEMTEST on systems where address zero isn't writeable - enable 3.rd UART (ST-UART) on PXA(XScale) CPUs - trigger watchdog while waiting in serial driver
459 lines
9.7 KiB
C
459 lines
9.7 KiB
C
/*
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* (C) Copyright 2002
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* Daniel Engström, Omicron Ceti AB, daniel@omicron.se
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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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#include <asm/io.h>
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ulong myflush(void);
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#define SC520_MAX_FLASH_BANKS 3
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#define SC520_FLASH_BANK0_BASE 0x38000000 /* BOOTCS */
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#define SC520_FLASH_BANK1_BASE 0x30000000 /* ROMCS0 */
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#define SC520_FLASH_BANK2_BASE 0x28000000 /* ROMCS1 */
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#define SC520_FLASH_BANKSIZE 0x8000000
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#define AMD29LV016_SIZE 0x200000
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#define AMD29LV016_SECTORS 32
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flash_info_t flash_info[SC520_MAX_FLASH_BANKS];
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#define CMD_READ_ARRAY 0x00F000F0
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#define CMD_UNLOCK1 0x00AA00AA
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#define CMD_UNLOCK2 0x00550055
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#define CMD_ERASE_SETUP 0x00800080
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#define CMD_ERASE_CONFIRM 0x00300030
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#define CMD_PROGRAM 0x00A000A0
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#define CMD_UNLOCK_BYPASS 0x00200020
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#define BIT_ERASE_DONE 0x00800080
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#define BIT_RDY_MASK 0x00800080
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#define BIT_PROGRAM_ERROR 0x00200020
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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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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 < SC520_MAX_FLASH_BANKS; i++) {
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ulong flashbase = 0;
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int sectsize = 0;
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if (i==0 || i==2) {
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/* FixMe: this assumes that bank 0 and 2
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* are mapped to the two 8Mb banks */
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flash_info[i].flash_id =
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(AMD_MANUFACT & FLASH_VENDMASK) |
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(AMD_ID_LV016B & FLASH_TYPEMASK);
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flash_info[i].size = AMD29LV016_SIZE*4;
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flash_info[i].sector_count = AMD29LV016_SECTORS;
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sectsize = (AMD29LV016_SIZE*4)/AMD29LV016_SECTORS;
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} else {
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/* FixMe: this assumes that bank1 is unmapped
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* (or mapped to the same flash bank as BOOTCS) */
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flash_info[i].flash_id = 0;
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flash_info[i].size = 0;
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flash_info[i].sector_count = 0;
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sectsize=0;
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}
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memset(flash_info[i].protect, 0, CFG_MAX_FLASH_SECT);
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switch (i) {
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case 0:
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flashbase = SC520_FLASH_BANK0_BASE;
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break;
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case 1:
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flashbase = SC520_FLASH_BANK1_BASE;
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break;
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case 2:
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flashbase = SC520_FLASH_BANK0_BASE;
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break;
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default:
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panic("configured too many flash banks!\n");
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}
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for (j = 0; j < flash_info[i].sector_count; j++) {
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flash_info[i].start[j] = sectsize;
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flash_info[i].start[j] = flashbase + j * sectsize;
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}
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size += flash_info[i].size;
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}
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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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i386boot_start-SC520_FLASH_BANK0_BASE,
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i386boot_end-SC520_FLASH_BANK0_BASE,
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&flash_info[0]);
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#ifdef CFG_ENV_ADDR
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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,
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&flash_info[0]);
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#endif
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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 (AMD_MANUFACT & FLASH_VENDMASK):
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printf("AMD: ");
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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 (AMD_ID_LV016B & FLASH_TYPEMASK):
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printf("4x Amd29LV016B (16Mbit)\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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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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done:
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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, prot, sect;
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int rc = ERR_OK;
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int chip1, chip2;
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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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}
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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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(AMD_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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/*
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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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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();
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if (info->protect[sect] == 0) {
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/* not protected */
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ulong addr = info->start[sect];
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writel(CMD_UNLOCK1, addr + 1);
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writel(CMD_UNLOCK2, addr + 2);
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writel(CMD_ERASE_SETUP, addr + 1);
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writel(CMD_UNLOCK1, addr + 1);
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writel(CMD_UNLOCK2, addr + 2);
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writel(CMD_ERASE_CONFIRM, addr);
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/* wait until flash is ready */
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chip1 = chip2 = 0;
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do {
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result = readl(addr);
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/* check timeout */
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if (get_timer(0) > CFG_FLASH_ERASE_TOUT) {
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writel(CMD_READ_ARRAY, addr + 1);
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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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}
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if (!chip1 && (result & 0xFFFF) & BIT_PROGRAM_ERROR) {
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chip1 = ERR;
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}
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if (!chip2 && (result >> 16) & BIT_ERASE_DONE) {
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chip2 = READY;
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}
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if (!chip2 && (result >> 16) & BIT_PROGRAM_ERROR) {
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chip2 = ERR;
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}
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} while (!chip1 || !chip2);
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writel(CMD_READ_ARRAY, addr + 1);
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if (chip1 == ERR || chip2 == 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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}
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outahere:
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/* allow flash to settle - wait 10 ms */
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udelay(10000);
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if (iflag) {
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enable_interrupts();
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}
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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, ulong data)
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{
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ulong addr = dest;
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ulong result;
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int rc = ERR_OK;
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int iflag;
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int chip1, chip2;
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/*
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* Check if Flash is (sufficiently) erased
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*/
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result = readl(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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/*
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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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iflag = disable_interrupts();
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writel(CMD_UNLOCK1, addr + 1);
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writel(CMD_UNLOCK2, addr + 2);
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writel(CMD_UNLOCK_BYPASS, addr + 1);
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writel(addr, CMD_PROGRAM);
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writel(addr, data);
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/* arm simple, non interrupt dependent timer */
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reset_timer();
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/* wait until flash is ready */
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chip1 = chip2 = 0;
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do {
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result = readl(addr);
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/* check timeout */
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if (get_timer(0) > 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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}
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if (!chip1 && ((result & 0xFFFF) & BIT_PROGRAM_ERROR)) {
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result = readl(addr);
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if ((result & 0x80) == (data & 0x80)) {
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chip1 = READY;
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} else {
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chip1 = ERR;
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}
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}
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if (!chip2 && ((result & (0x80 << 16)) == (data & (0x80 << 16)))) {
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chip2 = READY;
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}
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if (!chip2 && ((result >> 16) & BIT_PROGRAM_ERROR)) {
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result = readl(addr);
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if ((result & (0x80 << 16)) == (data & (0x80 << 16))) {
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chip2 = READY;
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} else {
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chip2 = ERR;
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}
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}
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} while (!chip1 || !chip2);
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writel(CMD_READ_ARRAY, addr);
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if (chip1 == ERR || chip2 == ERR || readl(addr) != data) {
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rc = ERR_PROG_ERROR;
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}
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if (iflag) {
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enable_interrupts();
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}
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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 cp, wp, data;
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int l;
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int i, rc;
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wp = (addr & ~3); /* get lower word aligned address */
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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 << 24);
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}
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for (; i<4 && cnt>0; ++i) {
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data = (data >> 8) | (*src++ << 24);
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--cnt;
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++cp;
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}
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for (; cnt==0 && i<4; ++i, ++cp) {
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data = (data >> 8) | (*(uchar *)cp << 24);
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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 += 4;
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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 >= 4) {
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data = *((vu_long*)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 += 4;
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wp += 4;
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cnt -= 4;
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}
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if (cnt == 0) {
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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<4 && cnt>0; ++i, ++cp) {
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data = (data >> 8) | (*src++ << 24);
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--cnt;
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}
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for (; i<4; ++i, ++cp) {
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data = (data >> 8) | (*(uchar *)cp << 24);
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}
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return write_word(info, wp, data);
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}
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