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author | wdenk <wdenk> | 2002-08-17 09:36:01 (GMT) |
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committer | wdenk <wdenk> | 2002-08-17 09:36:01 (GMT) |
commit | affae2bff825c1a8d2cfeaf7b270188d251d39d2 (patch) | |
tree | e025ca5a84cdcd70cff986e09f89e1aaa360499c /board/rsdproto/flash.c | |
parent | cf356ef708390102d493c53d18fd19a5963c6aa9 (diff) | |
download | u-boot-affae2bff825c1a8d2cfeaf7b270188d251d39d2.tar.xz |
Initial revision
Diffstat (limited to 'board/rsdproto/flash.c')
-rw-r--r-- | board/rsdproto/flash.c | 402 |
1 files changed, 402 insertions, 0 deletions
diff --git a/board/rsdproto/flash.c b/board/rsdproto/flash.c new file mode 100644 index 0000000..654012f --- /dev/null +++ b/board/rsdproto/flash.c @@ -0,0 +1,402 @@ +/* + * (C) Copyright 2000 + * Marius Groeger <mgroeger@sysgo.de> + * Sysgo Real-Time Solutions, GmbH <www.elinos.com> + * + * (C) Copyright 2000 + * Wolfgang Denk, DENX Software Engineering, wd@denx.de. + * + * Flash Routines for AM290[48]0B devices + * + *-------------------------------------------------------------------- + * 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> +#include <mpc8xx.h> + +/* flash hardware ids */ +#define VENDOR_AMD 0x0001 +#define AMD_29DL323C_B 0x2253 + +/* Define this to include autoselect sequence in flash_init(). Does NOT + * work when executing from flash itself, so this should be turned + * on only when debugging the RAM version. + */ +#undef WITH_AUTOSELECT + +flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */ + +#if 1 +#define D(x) +#else +#define D(x) printf x +#endif + +/*----------------------------------------------------------------------- + * Functions + */ + +static unsigned char write_ull(flash_info_t *info, + unsigned long address, + volatile unsigned long long data); + +/* from flash_asm.S */ +extern void ull_write(unsigned long long volatile *address, + unsigned long long volatile *data); +extern void ull_read(unsigned long long volatile *address, + unsigned long long volatile *data); + +/*----------------------------------------------------------------------- + */ + +unsigned long flash_init (void) +{ + int i; + ulong addr; + +#ifdef WITH_AUTOSELECT + { + unsigned long long *f_addr = (unsigned long long *)PHYS_FLASH; + unsigned long long f_command, vendor, device; + /* Perform Autoselect */ + f_command = 0x00AA00AA00AA00AAULL; + ull_write(&f_addr[0x555], &f_command); + f_command = 0x0055005500550055ULL; + ull_write(&f_addr[0x2AA], &f_command); + f_command = 0x0090009000900090ULL; + ull_write(&f_addr[0x555], &f_command); + ull_read(&f_addr[0], &vendor); + vendor &= 0xffff; + ull_read(&f_addr[1], &device); + device &= 0xffff; + f_command = 0x00F000F000F000F0ULL; + ull_write(&f_addr[0x555], &f_command); + if (vendor != VENDOR_AMD || device != AMD_29DL323C_B) + return 0; + } +#endif + + /* Init: no FLASHes known */ + for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) { + flash_info[i].flash_id = FLASH_UNKNOWN; + } + + /* 1st bank: 8 x 32 KB sectors */ + flash_info[0].flash_id = VENDOR_AMD << 16 | AMD_29DL323C_B; + flash_info[0].sector_count = 8; + flash_info[0].size = flash_info[0].sector_count * 32 * 1024; + addr = PHYS_FLASH; + for(i = 0; i < flash_info[0].sector_count; i++) { + flash_info[0].start[i] = addr; + addr += flash_info[0].size / flash_info[0].sector_count; + } + /* 1st bank: 63 x 256 KB sectors */ + flash_info[1].flash_id = VENDOR_AMD << 16 | AMD_29DL323C_B; + flash_info[1].sector_count = 63; + flash_info[1].size = flash_info[1].sector_count * 256 * 1024; + for(i = 0; i < flash_info[1].sector_count; i++) { + flash_info[1].start[i] = addr; + addr += flash_info[1].size / flash_info[1].sector_count; + } + + /* + * protect monitor and environment sectors + */ + +#if CFG_MONITOR_BASE >= PHYS_FLASH + flash_protect(FLAG_PROTECT_SET, + CFG_MONITOR_BASE, + CFG_MONITOR_BASE+CFG_MONITOR_LEN-1, + &flash_info[0]); + flash_protect(FLAG_PROTECT_SET, + CFG_MONITOR_BASE, + CFG_MONITOR_BASE+CFG_MONITOR_LEN-1, + &flash_info[1]); +#endif + +#if (CFG_ENV_IS_IN_FLASH == 1) && defined(CFG_ENV_ADDR) +# ifndef CFG_ENV_SIZE +# define CFG_ENV_SIZE CFG_ENV_SECT_SIZE +# endif + flash_protect(FLAG_PROTECT_SET, + CFG_ENV_ADDR, + CFG_ENV_ADDR + CFG_ENV_SIZE - 1, + &flash_info[0]); + flash_protect(FLAG_PROTECT_SET, + CFG_ENV_ADDR, + CFG_ENV_ADDR + CFG_ENV_SIZE - 1, + &flash_info[1]); +#endif + + return flash_info[0].size + flash_info[1].size; +} + +/*----------------------------------------------------------------------- + */ +void flash_print_info (flash_info_t *info) +{ + int i; + + if (info->flash_id == FLASH_UNKNOWN) { + printf ("missing or unknown FLASH type\n"); + return; + } + + switch (info->flash_id >> 16) { + case VENDOR_AMD: + printf ("AMD "); + break; + default: + printf ("Unknown Vendor "); + break; + } + + switch (info->flash_id & FLASH_TYPEMASK) { + case AMD_29DL323C_B: + printf ("AM29DL323CB (32 Mbit)\n"); + break; + default: + printf ("Unknown Chip Type\n"); + 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"); + return; +} + +/*----------------------------------------------------------------------- + */ + +int flash_erase (flash_info_t *info, int s_first, int s_last) +{ + int flag, prot, sect, l_sect; + ulong start; + unsigned long long volatile *f_addr; + unsigned long long volatile f_command; + + if ((s_first < 0) || (s_first > s_last)) { + if (info->flash_id == FLASH_UNKNOWN) { + printf ("- missing\n"); + } else { + printf ("- no sectors to erase\n"); + } + return 1; + } + + prot = 0; + for (sect = s_first; sect <= s_last; sect++) { + if (info->protect[sect]) { + prot++; + } + } + if (prot) { + printf ("- Warning: %d protected sectors will not be erased!\n", + prot); + } else { + printf ("\n"); + } + + f_addr = (unsigned long long *)info->start[0]; + f_command = 0x00AA00AA00AA00AAULL; + ull_write(&f_addr[0x555], &f_command); + f_command = 0x0055005500550055ULL; + ull_write(&f_addr[0x2AA], &f_command); + f_command = 0x0080008000800080ULL; + ull_write(&f_addr[0x555], &f_command); + f_command = 0x00AA00AA00AA00AAULL; + ull_write(&f_addr[0x555], &f_command); + f_command = 0x0055005500550055ULL; + ull_write(&f_addr[0x2AA], &f_command); + + /* Disable interrupts which might cause a timeout here */ + flag = disable_interrupts(); + + /* Start erase on unprotected sectors */ + for (l_sect = -1, sect = s_first; sect<=s_last; sect++) { + if (info->protect[sect] == 0) { /* not protected */ + + f_addr = + (unsigned long long *)(info->start[sect]); + f_command = 0x0030003000300030ULL; + ull_write(f_addr, &f_command); + l_sect = sect; + } + } + + /* re-enable interrupts if necessary */ + if (flag) + enable_interrupts(); + + start = get_timer (0); + do + { + if (get_timer(start) > CFG_FLASH_ERASE_TOUT) + { /* write reset command, command address is unimportant */ + /* this command turns the flash back to read mode */ + f_addr = + (unsigned long long *)(info->start[l_sect]); + f_command = 0x00F000F000F000F0ULL; + ull_write(f_addr, &f_command); + printf (" timeout\n"); + return 1; + } + } while(*f_addr != 0xFFFFFFFFFFFFFFFFULL); + + printf (" done\n"); + return 0; +} + +/*----------------------------------------------------------------------- + * Copy memory to flash, returns: + * 0 - OK + * 1 - write timeout + * 2 - Flash not erased + */ + +int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt) +{ + unsigned long cp, wp; + unsigned long long data; + int i, l, rc; + + wp = (addr & ~7); /* get lower long long 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); + } + for (; i<8 && cnt>0; ++i) { + data = (data << 8) | *src++; + --cnt; + ++cp; + } + for (; cnt==0 && i<8; ++i, ++cp) { + data = (data << 8) | (*(uchar *)cp); + } + + if ((rc = write_ull(info, wp, data)) != 0) { + return rc; + } + wp += 4; + } + + /* + * handle long long aligned part + */ + while (cnt >= 8) { + data = 0; + for (i=0; i<8; ++i) { + data = (data << 8) | *src++; + } + if ((rc = write_ull(info, wp, data)) != 0) { + return rc; + } + wp += 8; + cnt -= 8; + } + + if (cnt == 0) { + return ERR_OK; + } + + /* + * handle unaligned tail bytes + */ + data = 0; + for (i=0, cp=wp; i<8 && cnt>0; ++i, ++cp) { + data = (data << 8) | *src++; + --cnt; + } + for (; i<8; ++i, ++cp) { + data = (data << 8) | (*(uchar *)cp); + } + + return write_ull(info, wp, data); +} + +/*--------------------------------------------------------------------------- +* +* FUNCTION NAME: write_ull +* +* DESCRIPTION: writes 8 bytes to flash +* +* EXTERNAL EFFECT: nothing +* +* PARAMETERS: 32 bit long pointer to address, 64 bit long pointer to data +* +* RETURNS: 0 if OK, 1 if timeout, 4 if parameter error +*--------------------------------------------------------------------------*/ + +static unsigned char write_ull(flash_info_t *info, + unsigned long address, + volatile unsigned long long data) +{ + static unsigned long long f_command; + static unsigned long long *f_addr; + ulong start; + + /* address muss be 8-aligned! */ + if (address & 0x7) + return ERR_ALIGN; + + f_addr = (unsigned long long *)info->start[0]; + f_command = 0x00AA00AA00AA00AAULL; + ull_write(&f_addr[0x555], &f_command); + f_command = 0x0055005500550055ULL; + ull_write(&f_addr[0x2AA], &f_command); + f_command = 0x00A000A000A000A0ULL; + ull_write(&f_addr[0x555], &f_command); + + f_addr = (unsigned long long *)address; + f_command = data; + ull_write(f_addr, &f_command); + + start = get_timer (0); + do + { + if (get_timer(start) > CFG_FLASH_WRITE_TOUT) + { + /* write reset command, command address is unimportant */ + /* this command turns the flash back to read mode */ + f_addr = (unsigned long long *)info->start[0]; + f_command = 0x00F000F000F000F0ULL; + ull_write(f_addr, &f_command); + return ERR_TIMOUT; + } + } while(*((unsigned long long *)address) != data); + + return 0; +} |