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Diffstat (limited to 'board/netstar/flash.c')
| -rw-r--r-- | board/netstar/flash.c | 343 |
1 files changed, 343 insertions, 0 deletions
diff --git a/board/netstar/flash.c b/board/netstar/flash.c new file mode 100644 index 0000000..f555c0c --- /dev/null +++ b/board/netstar/flash.c @@ -0,0 +1,343 @@ +/* + * (C) Copyright 2002 + * Sysgo Real-Time Solutions, GmbH <www.elinos.com> + * Alex Zuepke <azu@sysgo.de> + * + * (C) Copyright 2005 + * 2N Telekomunikace, a.s. <www.2n.cz> + * Ladislav Michl <michl@2n.cz> + * + * 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> + +/*#if 0 */ +#if (PHYS_SDRAM_1_SIZE != SZ_32M) + +#include "crcek.h" + +#if (CFG_MAX_FLASH_BANKS > 1) +#error There is always only _one_ flash chip +#endif + +flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; + +#define CMD_READ_ARRAY 0x000000f0 +#define CMD_UNLOCK1 0x000000aa +#define CMD_UNLOCK2 0x00000055 +#define CMD_ERASE_SETUP 0x00000080 +#define CMD_ERASE_CONFIRM 0x00000030 +#define CMD_PROGRAM 0x000000a0 +#define CMD_UNLOCK_BYPASS 0x00000020 + +#define MEM_FLASH_ADDR1 (*(volatile u16 *)(CFG_FLASH_BASE + (0x00000555 << 1))) +#define MEM_FLASH_ADDR2 (*(volatile u16 *)(CFG_FLASH_BASE + (0x000002aa << 1))) + +#define BIT_ERASE_DONE 0x00000080 +#define BIT_RDY_MASK 0x00000080 +#define BIT_PROGRAM_ERROR 0x00000020 +#define BIT_TIMEOUT 0x80000000 /* our flag */ + +/*----------------------------------------------------------------------- + */ + +ulong flash_init(void) +{ + int i; + + flash_info[0].flash_id = (AMD_MANUFACT & FLASH_VENDMASK) | + (AMD_ID_LV800B & FLASH_TYPEMASK); + flash_info[0].size = PHYS_FLASH_1_SIZE; + flash_info[0].sector_count = CFG_MAX_FLASH_SECT; + memset(flash_info[0].protect, 0, CFG_MAX_FLASH_SECT); + + for (i = 0; i < flash_info[0].sector_count; i++) { + switch (i) { + case 0: /* 16kB */ + flash_info[0].start[0] = CFG_FLASH_BASE; + break; + case 1: /* 8kB */ + flash_info[0].start[1] = CFG_FLASH_BASE + 0x4000; + break; + case 2: /* 8kB */ + flash_info[0].start[2] = CFG_FLASH_BASE + 0x4000 + + 0x2000; + break; + case 3: /* 32 KB */ + flash_info[0].start[3] = CFG_FLASH_BASE + 0x4000 + + 2 * 0x2000; + break; + case 4: + flash_info[0].start[4] = CFG_FLASH_BASE + 0x4000 + + 2 * 0x2000 + 0x8000; + break; + default: /* 64kB */ + flash_info[0].start[i] = flash_info[0].start[i-1] + + 0x10000; + break; + } + } + + /* U-Boot */ + flash_protect(FLAG_PROTECT_SET, + LOADER1_OFFSET, + LOADER1_OFFSET + LOADER_SIZE - 1, flash_info); + /* Protect crcek, env and r_env as well */ + flash_protect(FLAG_PROTECT_SET, 0, 0x8000 - 1, flash_info); + + return flash_info[0].size; +} + +/*----------------------------------------------------------------------- + */ +void flash_print_info(flash_info_t *info) +{ + int i; + + switch (info->flash_id & FLASH_VENDMASK) { + case (AMD_MANUFACT & FLASH_VENDMASK): + puts("AMD: "); + break; + default: + puts("Unknown vendor "); + break; + } + + switch (info->flash_id & FLASH_TYPEMASK) { + case (AMD_ID_LV800B & FLASH_TYPEMASK): + puts("AM29LV800BB (8Mb)\n"); + break; + default: + puts("Unknown chip type\n"); + return; + } + + printf(" Size: %ld MB in %d sectors\n", + info->size >> 20, info->sector_count); + + puts(" Sector start addresses:"); + for (i = 0; i < info->sector_count; i++) { + if ((i % 5) == 0) + puts("\n "); + + printf(" %08lX%s", info->start[i], + info->protect[i] ? " (RO)" : " "); + } + puts("\n"); +} + +/*----------------------------------------------------------------------- + */ + +int flash_erase(flash_info_t *info, int s_first, int s_last) +{ + ushort result; + int prot, sect; + int rc = ERR_OK; + + /* first look for protection bits */ + + 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) != + (AMD_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) + printf("- Warning: %d protected sectors will not be erased!\n", + prot); + else + putc('\n'); + + /* Start erase on unprotected sectors */ + for (sect = s_first; sect <= s_last && !ctrlc (); sect++) { + if (info->protect[sect] == 0) { /* not protected */ + vu_short *addr = (vu_short *) (info->start[sect]); + + /* arm simple, non interrupt dependent timer */ + reset_timer_masked(); + + MEM_FLASH_ADDR1 = CMD_UNLOCK1; + MEM_FLASH_ADDR2 = CMD_UNLOCK2; + MEM_FLASH_ADDR1 = CMD_ERASE_SETUP; + + MEM_FLASH_ADDR1 = CMD_UNLOCK1; + MEM_FLASH_ADDR2 = CMD_UNLOCK2; + *addr = CMD_ERASE_CONFIRM; + + /* wait until flash is ready */ + while (1) { + result = *addr; + + /* check timeout */ + if (get_timer_masked() > CFG_FLASH_ERASE_TOUT) { + MEM_FLASH_ADDR1 = CMD_READ_ARRAY; + rc = ERR_TIMOUT; + break; + } + + if ((result & 0xfff) & BIT_ERASE_DONE) + break; + + if ((result & 0xffff) & BIT_PROGRAM_ERROR) { + rc = ERR_PROG_ERROR; + break; + } + } + + MEM_FLASH_ADDR1 = CMD_READ_ARRAY; + + if (rc != ERR_OK) + goto out; + + putc('.'); + } + } +out: + /* allow flash to settle - wait 10 ms */ + udelay_masked(10000); + + return rc; +} + +/*----------------------------------------------------------------------- + * Copy memory to flash + */ + +volatile static int write_hword(flash_info_t *info, ulong dest, ushort data) +{ + vu_short *addr = (vu_short *) dest; + ushort result; + int rc = ERR_OK; + + /* check if flash is (sufficiently) erased */ + result = *addr; + if ((result & data) != data) + return ERR_NOT_ERASED; + + MEM_FLASH_ADDR1 = CMD_UNLOCK1; + MEM_FLASH_ADDR2 = CMD_UNLOCK2; + MEM_FLASH_ADDR1 = CMD_PROGRAM; + *addr = data; + + /* arm simple, non interrupt dependent timer */ + reset_timer_masked(); + + /* wait until flash is ready */ + while (1) { + result = *addr; + + /* check timeout */ + if (get_timer_masked () > CFG_FLASH_ERASE_TOUT) { + rc = ERR_TIMOUT; + break; + } + + if ((result & 0x80) == (data & 0x80)) + break; + + if ((result & 0xffff) & BIT_PROGRAM_ERROR) { + result = *addr; + + if ((result & 0x80) != (data & 0x80)) + rc = ERR_PROG_ERROR; + } + } + + *addr = CMD_READ_ARRAY; + + if (*addr != data) + rc = ERR_PROG_ERROR; + + return rc; +} + +/*----------------------------------------------------------------------- + * Copy memory to flash. + */ + +int write_buff(flash_info_t *info, uchar *src, ulong addr, ulong cnt) +{ + ulong cp, wp; + int l; + int i, rc; + ushort data; + + 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_hword(info, wp, data)) != 0) + return (rc); + wp += 2; + } + + /* + * handle word aligned part + */ + while (cnt >= 2) { + data = *((vu_short *) src); + if ((rc = write_hword(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_hword(info, wp, data); +} + +#endif |