From ea8015b852305387b379a88d256ffe80d373d20a Mon Sep 17 00:00:00 2001 From: wdenk Date: Sat, 26 Oct 2002 16:43:06 +0000 Subject: Initial revision --- board/smdk2400/flash.c | 491 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 491 insertions(+) create mode 100644 board/smdk2400/flash.c (limited to 'board/smdk2400') diff --git a/board/smdk2400/flash.c b/board/smdk2400/flash.c new file mode 100644 index 0000000000..c4d6bae8f2 --- /dev/null +++ b/board/smdk2400/flash.c @@ -0,0 +1,491 @@ +/* + * (C) Copyright 2002 + * Sysgo Real-Time Solutions, GmbH + * Marius Groeger + * + * (C) Copyright 2002 + * Gary Jennejohn, DENX Software Engineering, + * + * 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 +#include + +#define FLASH_BANK_SIZE 0x1000000 /* 2 x 8 MB */ +#define MAIN_SECT_SIZE 0x40000 /* 2 x 128 kB */ + +flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; + + +#define CMD_READ_ARRAY 0x00FF00FF +#define CMD_IDENTIFY 0x00900090 +#define CMD_ERASE_SETUP 0x00200020 +#define CMD_ERASE_CONFIRM 0x00D000D0 +#define CMD_PROGRAM 0x00400040 +#define CMD_RESUME 0x00D000D0 +#define CMD_SUSPEND 0x00B000B0 +#define CMD_STATUS_READ 0x00700070 +#define CMD_STATUS_RESET 0x00500050 + +#define BIT_BUSY 0x00800080 +#define BIT_ERASE_SUSPEND 0x00400040 +#define BIT_ERASE_ERROR 0x00200020 +#define BIT_PROGRAM_ERROR 0x00100010 +#define BIT_VPP_RANGE_ERROR 0x00080008 +#define BIT_PROGRAM_SUSPEND 0x00040004 +#define BIT_PROTECT_ERROR 0x00020002 +#define BIT_UNDEFINED 0x00010001 + +#define BIT_SEQUENCE_ERROR 0x00300030 +#define BIT_TIMEOUT 0x80000000 + +/*----------------------------------------------------------------------- + */ + +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_28F640J3A & 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; + + /* uniform sector size */ + flashbase += 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 (INTEL_MANUFACT & FLASH_VENDMASK): + printf ("Intel: "); + break; + default: + printf ("Unknown Vendor "); + break; + } + + switch (info->flash_id & FLASH_TYPEMASK) { + case (INTEL_ID_28F640J3A & FLASH_TYPEMASK): + printf ("2x 28F640J3A (64Mbit)\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_error (ulong code) +{ + /* Check bit patterns */ + /* SR.7=0 is busy, SR.7=1 is ready */ + /* all other flags indicate error on 1 */ + /* SR.0 is undefined */ + /* Timeout is our faked flag */ + + /* sequence is described in Intel 290644-005 document */ + + /* check Timeout */ + if (code & BIT_TIMEOUT) { + puts ("Timeout\n"); + return ERR_TIMOUT; + } + + /* check Busy, SR.7 */ + if (~code & BIT_BUSY) { + puts ("Busy\n"); + return ERR_PROG_ERROR; + } + + /* check Vpp low, SR.3 */ + if (code & BIT_VPP_RANGE_ERROR) { + puts ("Vpp range error\n"); + return ERR_PROG_ERROR; + } + + /* check Device Protect Error, SR.1 */ + if (code & BIT_PROTECT_ERROR) { + puts ("Device protect error\n"); + return ERR_PROG_ERROR; + } + + /* check Command Seq Error, SR.4 & SR.5 */ + if (code & BIT_SEQUENCE_ERROR) { + puts ("Command seqence error\n"); + return ERR_PROG_ERROR; + } + + /* check Block Erase Error, SR.5 */ + if (code & BIT_ERASE_ERROR) { + puts ("Block erase error\n"); + return ERR_PROG_ERROR; + } + + /* check Program Error, SR.4 */ + if (code & BIT_PROGRAM_ERROR) { + puts ("Program error\n"); + return ERR_PROG_ERROR; + } + + /* check Block Erase Suspended, SR.6 */ + if (code & BIT_ERASE_SUSPEND) { + puts ("Block erase suspended\n"); + return ERR_PROG_ERROR; + } + + /* check Program Suspended, SR.2 */ + if (code & BIT_PROGRAM_SUSPEND) { + puts ("Program suspended\n"); + return ERR_PROG_ERROR; + } + + /* OK, no error */ + return ERR_OK; +} + +/*----------------------------------------------------------------------- + */ + +int flash_erase (flash_info_t * info, int s_first, int s_last) +{ + ulong result, result1; + int iflag, prot, sect; + int rc = ERR_OK; + +#ifdef USE_920T_MMU + int cflag; +#endif + + 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) != + (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) { + 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. + */ +#ifdef USE_920T_MMU + cflag = dcache_status (); + dcache_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]); + ulong bsR7, bsR7_2, bsR5, bsR5_2; + + /* *addr = CMD_STATUS_RESET; */ + *addr = CMD_ERASE_SETUP; + *addr = CMD_ERASE_CONFIRM; + + /* wait until flash is ready */ + do { + /* check timeout */ + if (get_timer_masked () > CFG_FLASH_ERASE_TOUT) { + *addr = CMD_STATUS_RESET; + result = BIT_TIMEOUT; + break; + } + + *addr = CMD_STATUS_READ; + result = *addr; + bsR7 = result & (1 << 7); + bsR7_2 = result & (1 << 23); + } while (!bsR7 | !bsR7_2); + + *addr = CMD_STATUS_READ; + result1 = *addr; + bsR5 = result1 & (1 << 5); + bsR5_2 = result1 & (1 << 21); +#ifdef SAMSUNG_FLASH_DEBUG + printf ("bsR5 %lx bsR5_2 %lx\n", bsR5, bsR5_2); + if (bsR5 != 0 && bsR5_2 != 0) + printf ("bsR5 %lx bsR5_2 %lx\n", bsR5, bsR5_2); +#endif + + *addr = CMD_READ_ARRAY; + *addr = CMD_RESUME; + + if ((rc = flash_error (result)) != ERR_OK) + 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 (); + +#ifdef USE_920T_MMU + if (cflag) + dcache_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; + int iflag; + +#ifdef USE_920T_MMU + int cflag; +#endif + + /* + * 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. + */ +#ifdef USE_920T_MMU + cflag = dcache_status (); + dcache_disable (); +#endif + iflag = disable_interrupts (); + + /* *addr = CMD_STATUS_RESET; */ + *addr = CMD_PROGRAM; + *addr = data; + + /* arm simple, non interrupt dependent timer */ + reset_timer_masked (); + + /* wait until flash is ready */ + do { + /* check timeout */ + if (get_timer_masked () > CFG_FLASH_ERASE_TOUT) { + *addr = CMD_SUSPEND; + result = BIT_TIMEOUT; + break; + } + + *addr = CMD_STATUS_READ; + result = *addr; + } while (~result & BIT_BUSY); + + /* *addr = CMD_READ_ARRAY; */ + *addr = CMD_STATUS_READ; + result = *addr; + + rc = flash_error (result); + + if (iflag) + enable_interrupts (); + +#ifdef USE_920T_MMU + if (cflag) + dcache_enable (); +#endif + *addr = CMD_READ_ARRAY; + *addr = CMD_RESUME; + 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); +} -- cgit v1.2.3