diff options
Diffstat (limited to 'board/trab')
| -rw-r--r-- | board/trab/flash.c | 455 |
1 files changed, 455 insertions, 0 deletions
diff --git a/board/trab/flash.c b/board/trab/flash.c new file mode 100644 index 0000000..2443777 --- /dev/null +++ b/board/trab/flash.c @@ -0,0 +1,455 @@ +/* + * (C) Copyright 2002 + * Gary Jennejohn, DENX Software Engineering, <gj@denx.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 + */ + +/* #define DEBUG */ + +#include <common.h> +#include <environment.h> + +ulong myflush (void); + + +#define FLASH_BANK_SIZE 0x800000 /* 8 MB */ +/* this varies depending on the sector */ +#define MAIN_SECT_SIZE 0x20000 /* 2 x 64 kB */ + +flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; + + +#define CMD_READ_ARRAY 0x00F000F0 +#define CMD_UNLOCK1 0x00AA00AA +#define CMD_UNLOCK2 0x00550055 +#define CMD_ERASE_SETUP 0x00800080 +#define CMD_ERASE_CONFIRM 0x00300030 +#define CMD_PROGRAM 0x00A000A0 +#define CMD_UNLOCK_BYPASS 0x00200020 + +#define MEM_FLASH_ADDR1 (*(volatile u32 *)(CFG_FLASH_BASE + (0x00000555 << 2))) +#define MEM_FLASH_ADDR2 (*(volatile u32 *)(CFG_FLASH_BASE + (0x000002AA << 2))) + +#define BIT_ERASE_DONE 0x00800080 +#define BIT_RDY_MASK 0x00800080 +#define BIT_PROGRAM_ERROR 0x00200020 +#define BIT_TIMEOUT 0x80000000 /* our flag */ + +#define READY 1 +#define ERR 2 +#define TMO 4 + +/*----------------------------------------------------------------------- + */ + +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 = + (AMD_MANUFACT & FLASH_VENDMASK) | + (AMD_ID_LV320B & 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); + if (i == 0) + flashbase = PHYS_FLASH_1; + else + panic ("configured too many flash banks!\n"); + for (j = 0; j < flash_info[i].sector_count; j++) { + + flash_info[i].start[j] = flashbase; + + /* the first 8 sectors are 8 kB */ + flashbase += (j < 8) ? 0x4000 : 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]); + +#ifdef CFG_ENV_ADDR_REDUND + flash_protect ( FLAG_PROTECT_SET, + CFG_ENV_ADDR_REDUND, + CFG_ENV_ADDR_REDUND + CFG_ENV_SIZE_REDUND - 1, + &flash_info[0]); +#endif + + return size; +} + +/*----------------------------------------------------------------------- + */ +void flash_print_info (flash_info_t * info) +{ + int i; + + switch (info->flash_id & FLASH_VENDMASK) { + case (AMD_MANUFACT & FLASH_VENDMASK): + printf ("AMD: "); + break; + default: + printf ("Unknown Vendor "); + break; + } + + switch (info->flash_id & FLASH_TYPEMASK) { + case (AMD_ID_LV320B & FLASH_TYPEMASK): + printf ("2x Am29LV320DB (32Mbit)\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"); + + Done: +} + +/*----------------------------------------------------------------------- + */ + +int flash_erase (flash_info_t * info, int s_first, int s_last) +{ + ulong result; + +#if 0 + int cflag; +#endif + int iflag, prot, sect; + int rc = ERR_OK; + int chip1, chip2; + + debug ("flash_erase: s_first %d s_last %d\n", s_first, s_last); + + /* 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 { + printf ("\n"); + } + + /* + * 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. + */ +#if 0 + cflag = icache_status (); + icache_disable (); +#endif + iflag = disable_interrupts (); + + /* Start erase on unprotected sectors */ + for (sect = s_first; sect <= s_last && !ctrlc (); sect++) { + + debug ("Erasing sector %2d @ %08lX... ", + sect, info->start[sect]); + + /* arm simple, non interrupt dependent timer */ + reset_timer_masked (); + + if (info->protect[sect] == 0) { /* not protected */ + vu_long *addr = (vu_long *) (info->start[sect]); + + 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 */ + chip1 = chip2 = 0; + + do { + result = *addr; + + /* check timeout */ + if (get_timer_masked () > CFG_FLASH_ERASE_TOUT) { + MEM_FLASH_ADDR1 = CMD_READ_ARRAY; + chip1 = TMO; + break; + } + + if (!chip1 && (result & 0xFFFF) & BIT_ERASE_DONE) + chip1 = READY; + + if (!chip1 && (result & 0xFFFF) & BIT_PROGRAM_ERROR) + chip1 = ERR; + + if (!chip2 && (result >> 16) & BIT_ERASE_DONE) + chip2 = READY; + + if (!chip2 && (result >> 16) & BIT_PROGRAM_ERROR) + chip2 = ERR; + + } while (!chip1 || !chip2); + + MEM_FLASH_ADDR1 = CMD_READ_ARRAY; + + if (chip1 == ERR || chip2 == ERR) { + rc = ERR_PROG_ERROR; + goto outahere; + } + if (chip1 == TMO) { + rc = ERR_TIMOUT; + goto outahere; + } + +#if 0 + printf ("ok.\n"); + } else { /* it was protected */ + + printf ("protected!\n"); +#endif + } + } + +outahere: + /* allow flash to settle - wait 10 ms */ + udelay_masked (10000); + + if (iflag) + enable_interrupts (); + +#if 0 + if (cflag) + icache_enable (); +#endif + return rc; +} + +/*----------------------------------------------------------------------- + * Copy memory to flash + */ + +volatile static int write_word (flash_info_t * info, ulong dest, + ulong data) +{ + vu_long *addr = (vu_long *) dest; + ulong result; + int rc = ERR_OK; + +#if 0 + int cflag; +#endif + int iflag; + int chip1, chip2; + + /* + * Check if Flash is (sufficiently) erased + */ + result = *addr; + if ((result & 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. + */ +#if 0 + cflag = icache_status (); + icache_disable (); +#endif + iflag = disable_interrupts (); + + MEM_FLASH_ADDR1 = CMD_UNLOCK1; + MEM_FLASH_ADDR2 = CMD_UNLOCK2; + MEM_FLASH_ADDR1 = CMD_UNLOCK_BYPASS; + *addr = CMD_PROGRAM; + *addr = data; + + /* arm simple, non interrupt dependent timer */ + reset_timer_masked (); + + /* wait until flash is ready */ + chip1 = chip2 = 0; + do { + result = *addr; + + /* check timeout */ + if (get_timer_masked () > CFG_FLASH_ERASE_TOUT) { + chip1 = ERR | TMO; + break; + } + if (!chip1 && ((result & 0x80) == (data & 0x80))) + chip1 = READY; + + if (!chip1 && ((result & 0xFFFF) & BIT_PROGRAM_ERROR)) { + result = *addr; + + if ((result & 0x80) == (data & 0x80)) + chip1 = READY; + else + chip1 = ERR; + } + + if (!chip2 && ((result & (0x80 << 16)) == (data & (0x80 << 16)))) + chip2 = READY; + + if (!chip2 && ((result >> 16) & BIT_PROGRAM_ERROR)) { + result = *addr; + + if ((result & (0x80 << 16)) == (data & (0x80 << 16))) + chip2 = READY; + else + chip2 = ERR; + } + + } while (!chip1 || !chip2); + + *addr = CMD_READ_ARRAY; + + if (chip1 == ERR || chip2 == ERR || *addr != data) + rc = ERR_PROG_ERROR; + + if (iflag) + enable_interrupts (); + +#if 0 + if (cflag) + icache_enable (); +#endif + + return rc; +} + +/*----------------------------------------------------------------------- + * Copy memory to flash. + */ + +int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt) +{ + ulong cp, wp, data; + int l; + int i, rc; + + wp = (addr & ~3); /* 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 << 24); + } + for (; i < 4 && cnt > 0; ++i) { + data = (data >> 8) | (*src++ << 24); + --cnt; + ++cp; + } + for (; cnt == 0 && i < 4; ++i, ++cp) { + data = (data >> 8) | (*(uchar *) cp << 24); + } + + if ((rc = write_word (info, wp, data)) != 0) { + return (rc); + } + wp += 4; + } + + /* + * handle word aligned part + */ + while (cnt >= 4) { + data = *((vu_long *) src); + if ((rc = write_word (info, wp, data)) != 0) { + return (rc); + } + src += 4; + wp += 4; + cnt -= 4; + } + + if (cnt == 0) { + return ERR_OK; + } + + /* + * handle unaligned tail bytes + */ + data = 0; + for (i = 0, cp = wp; i < 4 && cnt > 0; ++i, ++cp) { + data = (data >> 8) | (*src++ << 24); + --cnt; + } + for (; i < 4; ++i, ++cp) { + data = (data >> 8) | (*(uchar *) cp << 24); + } + + return write_word (info, wp, data); +} |