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https://github.com/brain-hackers/u-boot-brain
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![wdenk](/assets/img/avatar_default.png)
1: - board/altera/common/flash.c:flash_erase(): o allow interrupts befor get_timer() call o check-up each erased sector and avoid unexpected timeouts - board/altera/dk1c20/dk1s10.c:board_early_init_f(): o enclose sevenseg_set() in cpp condition - remove the ASMI configuration for DK1S10_standard_32 (never present) - fix some typed in mistakes in the NIOS documentation 2: - split DK1C20 configuration into several header files: o two new files for each NIOS CPU description o U-Boot related part is remaining in DK1C20.h 3: - split DK1S10 configuration into several header files: o two new files for each NIOS CPU description o U-Boot related part is remaining in DK1S10.h 4: - Add support for the Microtronix Linux Development Kit NIOS CPU configuration at the Altera Nios Development Kit, Stratix Edition (DK-1S10) 5: - Add documentation for the Altera Nios Development Kit, Stratix Edition (DK-1S10) 6: - Add support for the Nios Serial Peripharel Interface (SPI) (master only) 7: - Add support for the common U-Boot SPI framework at RTC driver DS1306
197 lines
4.7 KiB
C
197 lines
4.7 KiB
C
/*
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* (C) Copyright 2000-2004
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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 <nios.h>
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flash_info_t flash_info[CFG_MAX_FLASH_BANKS];
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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, k;
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unsigned long size;
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int erased;
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volatile unsigned char *flash;
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printf (" Size: %ld KB in %d Sectors\n",
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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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/* Check if whole sector is erased */
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if (i != (info->sector_count - 1))
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size = info->start[i + 1] - info->start[i];
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else
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size = info->start[0] + info->size - info->start[i];
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erased = 1;
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flash = (volatile unsigned char *) info->start[i];
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for (k = 0; k < size; k++) {
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if (*flash++ != 0xff) {
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erased = 0;
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break;
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}
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}
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/* Print the info */
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if ((i % 5) == 0)
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printf ("\n ");
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printf (" %08lX%s%s", info->start[i], erased ? " E" : " ",
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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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int flash_erase (flash_info_t * info, int s_first, int s_last)
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{
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volatile CFG_FLASH_WORD_SIZE *addr = (CFG_FLASH_WORD_SIZE *) (info->start[0]);
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volatile CFG_FLASH_WORD_SIZE *addr2;
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int prot, sect;
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unsigned oldpri;
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ulong start;
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/* Some sanity checking */
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if ((s_first < 0) || (s_first > s_last)) {
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printf ("- no sectors to erase\n");
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return 1;
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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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printf ("- Warning: %d protected sectors will not be erased!\n",
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prot);
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} else {
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printf ("\n");
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}
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#ifdef DEBUG
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for (sect = s_first; sect <= s_last; sect++) {
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printf("- Erase: Sect: %i @ 0x%08x\n", sect, info->start[sect]);
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}
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#endif
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/* NOTE: disabling interrupts on Nios can be very bad since it
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* also disables the LO_LIMIT exception. It's better here to
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* set the interrupt priority to 3 & restore it when we're done.
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*/
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oldpri = ipri (3);
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/* It's ok to erase multiple sectors provided we don't delay more
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* than 50 usec between cmds ... at which point the erase time-out
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* occurs. So don't go and put printf() calls in the loop ... it
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* won't be very helpful ;-)
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*/
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for (sect = s_first; sect <= s_last; sect++) {
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if (info->protect[sect] == 0) { /* not protected */
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addr2 = (CFG_FLASH_WORD_SIZE *) (info->start[sect]);
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*addr = 0xaa;
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*addr = 0x55;
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*addr = 0x80;
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*addr = 0xaa;
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*addr = 0x55;
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*addr2 = 0x30;
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/* Now just wait for 0xff & provide some user
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* feedback while we wait. Here we have to grant
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* timer interrupts. Otherwise get_timer() can't
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* work right. */
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ipri(oldpri);
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start = get_timer (0);
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while (*addr2 != 0xff) {
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udelay (1000 * 1000);
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putc ('.');
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if (get_timer (start) > CFG_FLASH_ERASE_TOUT) {
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printf ("timeout\n");
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return 1;
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}
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}
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oldpri = ipri (3); /* disallow non important irqs again */
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}
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}
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printf ("\n");
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/* Restore interrupt priority */
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ipri (oldpri);
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return 0;
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}
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/*-----------------------------------------------------------------------
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* Copy memory to flash, returns:
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* 0 - OK
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* 1 - write timeout
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* 2 - Flash not erased
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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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vu_char *cmd = (vu_char *) info->start[0];
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vu_char *dst = (vu_char *) addr;
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unsigned char b;
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unsigned oldpri;
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ulong start;
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while (cnt) {
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/* Check for sufficient erase */
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b = *src;
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if ((*dst & b) != b) {
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printf ("%02x : %02x\n", *dst, b);
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return (2);
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}
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/* Disable interrupts other than window underflow
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* (interrupt priority 2)
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*/
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oldpri = ipri (3);
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*cmd = 0xaa;
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*cmd = 0x55;
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*cmd = 0xa0;
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*dst = b;
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/* Verify write */
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start = get_timer (0);
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while (*dst != b) {
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if (get_timer (start) > CFG_FLASH_WRITE_TOUT) {
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ipri (oldpri);
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return 1;
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}
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}
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dst++;
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src++;
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cnt--;
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ipri (oldpri);
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}
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return (0);
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}
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