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Diffstat (limited to 'board/csb226/flash.c')
| -rw-r--r-- | board/csb226/flash.c | 364 |
1 files changed, 364 insertions, 0 deletions
diff --git a/board/csb226/flash.c b/board/csb226/flash.c new file mode 100644 index 0000000..0b95648 --- /dev/null +++ b/board/csb226/flash.c @@ -0,0 +1,364 @@ +/* + * (C) Copyright 2002 + * Kyle Harris, Nexus Technologies, Inc. kharris@nexus-tech.net + * + * (C) Copyright 2002 + * Sysgo Real-Time Solutions, GmbH <www.elinos.com> + * Marius Groeger <mgroeger@sysgo.de> + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#include <common.h> + +#define FLASH_BANK_SIZE 0x02000000 +#define MAIN_SECT_SIZE 0x40000 /* 2x16 = 256k per sector */ + +flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; + + +/*----------------------------------------------------------------------- + */ + +ulong flash_init(void) +{ + int i, j; + ulong size = 0; + + for (i = 0; i < CFG_MAX_FLASH_BANKS; i++) + { + ulong flashbase = 0; + flash_info[i].flash_id = + (INTEL_MANUFACT & FLASH_VENDMASK) | + (INTEL_ID_28F128J3 & FLASH_TYPEMASK); + flash_info[i].size = FLASH_BANK_SIZE; + flash_info[i].sector_count = CFG_MAX_FLASH_SECT; + memset(flash_info[i].protect, 0, CFG_MAX_FLASH_SECT); + + switch (i) + { + case 0: + flashbase = PHYS_FLASH_1; + break; + default: + panic("configured to many flash banks!\n"); + break; + } + for (j = 0; j < flash_info[i].sector_count; j++) + { + flash_info[i].start[j] = flashbase + j*MAIN_SECT_SIZE; + } + size += flash_info[i].size; + } + + /* Protect monitor and environment sectors + */ + flash_protect(FLAG_PROTECT_SET, + CFG_FLASH_BASE, + CFG_FLASH_BASE + _armboot_end_data - _armboot_start, + &flash_info[0]); + + flash_protect(FLAG_PROTECT_SET, + CFG_ENV_ADDR, + CFG_ENV_ADDR + CFG_ENV_SIZE - 1, + &flash_info[0]); + + return size; +} + +/*----------------------------------------------------------------------- + */ +void flash_print_info (flash_info_t *info) +{ + int i, j; + + for (j=0; j<CFG_MAX_FLASH_BANKS; j++) + { + switch (info->flash_id & FLASH_VENDMASK) + { + case (INTEL_MANUFACT & FLASH_VENDMASK): + printf("Intel: "); + break; + default: + printf("Unknown Vendor "); + break; + } + + switch (info->flash_id & FLASH_TYPEMASK) + { + case (INTEL_ID_28F128J3 & FLASH_TYPEMASK): + printf("28F128J3 (128Mbit)\n"); + break; + default: + printf("Unknown Chip Type\n"); + goto Done; + break; + } + + printf(" Size: %ld MB in %d Sectors\n", + info->size >> 20, info->sector_count); + + printf(" Sector Start Addresses:"); + for (i = 0; i < info->sector_count; i++) + { + if ((i % 5) == 0) + { + printf ("\n "); + } + printf (" %08lX%s", info->start[i], + info->protect[i] ? " (RO)" : " "); + } + printf ("\n"); + info++; + } + +Done: +} + +/*----------------------------------------------------------------------- + */ + +int flash_erase (flash_info_t *info, int s_first, int s_last) +{ + int flag, prot, sect; + int rc = ERR_OK; + + if (info->flash_id == FLASH_UNKNOWN) + return ERR_UNKNOWN_FLASH_TYPE; + + if ((s_first < 0) || (s_first > s_last)) { + return ERR_INVAL; + } + + if ((info->flash_id & FLASH_VENDMASK) != + (INTEL_MANUFACT & FLASH_VENDMASK)) { + return ERR_UNKNOWN_FLASH_VENDOR; + } + + prot = 0; + for (sect=s_first; sect<=s_last; ++sect) { + if (info->protect[sect]) { + prot++; + } + } + if (prot) + return ERR_PROTECTED; + + /* + * Disable interrupts which might cause a timeout + * here. Remember that our exception vectors are + * at address 0 in the flash, and we don't want a + * (ticker) exception to happen while the flash + * chip is in programming mode. + */ + flag = disable_interrupts(); + + /* Start erase on unprotected sectors */ + for (sect = s_first; sect<=s_last && !ctrlc(); sect++) { + + printf("Erasing sector %2d ... ", sect); + + /* arm simple, non interrupt dependent timer */ + reset_timer_masked(); + + if (info->protect[sect] == 0) { /* not protected */ + /* vushort *addr = (vushort *)(info->start[sect]); */ + ushort *addr = (ushort *)(info->start[sect]); + + *addr = 0x20; /* erase setup */ + *addr = 0xD0; /* erase confirm */ + + while ((*addr & 0x80) != 0x80) { + if (get_timer_masked() > CFG_FLASH_ERASE_TOUT) { + *addr = 0xB0; /* suspend erase */ + *addr = 0xFF; /* reset to read mode */ + rc = ERR_TIMOUT; + goto outahere; + } + } + + /* clear status register command */ + *addr = 0x50; + /* reset to read mode */ + *addr = 0xFF; + } + printf("ok.\n"); + } + if (ctrlc()) + printf("User Interrupt!\n"); + +outahere: + + /* allow flash to settle - wait 10 ms */ + udelay_masked(10000); + + if (flag) + enable_interrupts(); + + return rc; +} + +/*----------------------------------------------------------------------- + * Copy memory to flash + */ + +static int write_word (flash_info_t *info, ulong dest, ushort data) +{ + /* vushort *addr = (vushort *)dest, val; */ + ushort *addr = (ushort *)dest, val; + int rc = ERR_OK; + int flag; + + /* Check if Flash is (sufficiently) erased + */ + if ((*addr & data) != data) + return ERR_NOT_ERASED; + + /* + * Disable interrupts which might cause a timeout + * here. Remember that our exception vectors are + * at address 0 in the flash, and we don't want a + * (ticker) exception to happen while the flash + * chip is in programming mode. + */ + flag = disable_interrupts(); + + /* clear status register command */ + *addr = 0x50; + + /* program set-up command */ + *addr = 0x40; + + /* latch address/data */ + *addr = data; + + /* arm simple, non interrupt dependent timer */ + reset_timer_masked(); + + /* wait while polling the status register */ + while(((val = *addr) & 0x80) != 0x80) + { + if (get_timer_masked() > CFG_FLASH_WRITE_TOUT) { + rc = ERR_TIMOUT; + /* suspend program command */ + *addr = 0xB0; + goto outahere; + } + } + + if(val & 0x1A) { /* check for error */ + printf("\nFlash write error %02x at address %08lx\n", + (int)val, (unsigned long)dest); + if(val & (1<<3)) { + printf("Voltage range error.\n"); + rc = ERR_PROG_ERROR; + goto outahere; + } + if(val & (1<<1)) { + printf("Device protect error.\n"); + rc = ERR_PROTECTED; + goto outahere; + } + if(val & (1<<4)) { + printf("Programming error.\n"); + rc = ERR_PROG_ERROR; + goto outahere; + } + rc = ERR_PROG_ERROR; + goto outahere; + } + +outahere: + /* read array command */ + *addr = 0xFF; + + if (flag) + enable_interrupts(); + + return rc; +} + +/*----------------------------------------------------------------------- + * Copy memory to flash. + */ + +int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt) +{ + ulong cp, wp; + ushort data; + int l; + int i, rc; + + wp = (addr & ~1); /* 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 << 8); + } + for (; i<2 && cnt>0; ++i) { + data = (data >> 8) | (*src++ << 8); + --cnt; + ++cp; + } + for (; cnt==0 && i<2; ++i, ++cp) { + data = (data >> 8) | (*(uchar *)cp << 8); + } + + if ((rc = write_word(info, wp, data)) != 0) { + return (rc); + } + wp += 2; + } + + /* + * handle word aligned part + */ + while (cnt >= 2) { + /* data = *((vushort*)src); */ + data = *((ushort*)src); + if ((rc = write_word(info, wp, data)) != 0) { + return (rc); + } + src += 2; + wp += 2; + cnt -= 2; + } + + if (cnt == 0) { + return ERR_OK; + } + + /* + * handle unaligned tail bytes + */ + data = 0; + for (i=0, cp=wp; i<2 && cnt>0; ++i, ++cp) { + data = (data >> 8) | (*src++ << 8); + --cnt; + } + for (; i<2; ++i, ++cp) { + data = (data >> 8) | (*(uchar *)cp << 8); + } + + return write_word(info, wp, data); +} |