diff options
Diffstat (limited to 'board/o2dnt/flash.c')
| -rw-r--r-- | board/o2dnt/flash.c | 587 |
1 files changed, 0 insertions, 587 deletions
diff --git a/board/o2dnt/flash.c b/board/o2dnt/flash.c deleted file mode 100644 index 9f3088004..000000000 --- a/board/o2dnt/flash.c +++ /dev/null @@ -1,587 +0,0 @@ -/* - * (C) Copyright 2005 - * Wolfgang Denk, DENX Software Engineering, wd@denx.de. - * - * flash_real_protect() routine based on boards/alaska/flash.c - * (C) Copyright 2001 - * Kyle Harris, Nexus Technologies, Inc. kharris@nexus-tech.net - * - * 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> - -/* Intel-compatible flash commands */ -#define INTEL_ERASE 0x20 -#define INTEL_PROGRAM 0x40 -#define INTEL_CLEAR 0x50 -#define INTEL_LOCKBIT 0x60 -#define INTEL_PROTECT 0x01 -#define INTEL_STATUS 0x70 -#define INTEL_READID 0x90 -#define INTEL_READID 0x90 -#define INTEL_SUSPEND 0xB0 -#define INTEL_CONFIRM 0xD0 -#define INTEL_RESET 0xFF - -/* Intel-compatible flash status bits */ -#define INTEL_FINISHED 0x80 -#define INTEL_OK 0x80 - -typedef unsigned char FLASH_PORT_WIDTH; -typedef volatile unsigned char FLASH_PORT_WIDTHV; -#define FPW FLASH_PORT_WIDTH -#define FPWV FLASH_PORT_WIDTHV -#define FLASH_ID_MASK 0xFF - -#define ORMASK(size) ((-size) & OR_AM_MSK) - -#define FLASH_CYCLE1 0x0555 -#define FLASH_CYCLE2 0x02aa - -flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */ - -/*----------------------------------------------------------------------- - * Functions - */ -static ulong flash_get_size(FPWV *addr, flash_info_t *info); -static void flash_reset(flash_info_t *info); -static flash_info_t *flash_get_info(ulong base); -static int write_data (flash_info_t *info, FPWV *dest, FPW data); /* O2D */ -static void flash_sync_real_protect (flash_info_t * info); -static unsigned char intel_sector_protected (flash_info_t *info, ushort sector); - -/*----------------------------------------------------------------------- - * flash_init() - * - * sets up flash_info and returns size of FLASH (bytes) - */ -unsigned long flash_init (void) -{ - unsigned long size = 0; - int i; - extern void flash_preinit(void); - extern void flash_afterinit(ulong); - - flash_preinit(); - - /* Init: no FLASHes known */ - for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; ++i) { - memset(&flash_info[i], 0, sizeof(flash_info_t)); - flash_info[i].flash_id = FLASH_UNKNOWN; - } - - /* Query flash chip */ - flash_info[0].size = - flash_get_size((FPW *)CONFIG_SYS_FLASH_BASE, &flash_info[0]); - size += flash_info[0].size; - - /* get the h/w and s/w protection status in sync */ - flash_sync_real_protect(&flash_info[0]); - -#if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE - /* monitor protection ON by default */ - flash_protect(FLAG_PROTECT_SET, - CONFIG_SYS_MONITOR_BASE, - CONFIG_SYS_MONITOR_BASE+monitor_flash_len-1, - flash_get_info(CONFIG_SYS_MONITOR_BASE)); -#endif - -#ifdef CONFIG_ENV_IS_IN_FLASH - /* ENV protection ON by default */ - flash_protect(FLAG_PROTECT_SET, - CONFIG_ENV_ADDR, - CONFIG_ENV_ADDR+CONFIG_ENV_SIZE-1, - flash_get_info(CONFIG_ENV_ADDR)); -#endif - - - flash_afterinit(size); - return (size ? size : 1); -} - -/*----------------------------------------------------------------------- - */ -static void flash_reset(flash_info_t *info) -{ - FPWV *base = (FPWV *)(info->start[0]); - - /* Put FLASH back in read mode */ - if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) - *base = (FPW) INTEL_RESET; /* Intel Read Mode */ -} - -/*----------------------------------------------------------------------- - */ - -static flash_info_t *flash_get_info(ulong base) -{ - int i; - flash_info_t * info; - - for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i ++) { - info = & flash_info[i]; - if (info->size && - info->start[0] <= base && - base <= info->start[0] + info->size - 1) - break; - } - - return (i == CONFIG_SYS_MAX_FLASH_BANKS ? 0 : info); -} - -/*----------------------------------------------------------------------- - */ - -void flash_print_info (flash_info_t *info) -{ - int i; - uchar *boottype; - uchar *bootletter; - char *fmt; - uchar botbootletter[] = "B"; - uchar topbootletter[] = "T"; - uchar botboottype[] = "bottom boot sector"; - uchar topboottype[] = "top boot sector"; - - if (info->flash_id == FLASH_UNKNOWN) { - printf ("missing or unknown FLASH type\n"); - return; - } - - switch (info->flash_id & FLASH_VENDMASK) { - case FLASH_MAN_INTEL: - printf ("INTEL "); - break; - default: - printf ("Unknown Vendor "); - break; - } - - /* check for top or bottom boot, if it applies */ - if (info->flash_id & FLASH_BTYPE) { - boottype = botboottype; - bootletter = botbootletter; - } else { - boottype = topboottype; - bootletter = topbootletter; - } - - switch (info->flash_id & FLASH_TYPEMASK) { - case FLASH_28F128J3A: - fmt = "28F128J3 (128 Mbit, uniform sectors)\n"; - break; - default: - fmt = "Unknown Chip Type\n"; - break; - } - - printf (fmt, bootletter, boottype); - 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"); -} - -/*----------------------------------------------------------------------- - */ - -/* - * The following code cannot be run from FLASH! - */ -ulong flash_get_size (FPWV *addr, flash_info_t *info) -{ - int i; - - /* Write auto select command: read Manufacturer ID */ - /* Write auto select command sequence and test FLASH answer */ - addr[FLASH_CYCLE1] = (FPW) INTEL_READID; /* selects Intel or AMD */ - - /* The manufacturer codes are only 1 byte, so just use 1 byte. - * This works for any bus width and any FLASH device width. - */ - udelay(100); - switch (addr[0] & 0xff) { - case (uchar)INTEL_MANUFACT: - info->flash_id = FLASH_MAN_INTEL; - break; - default: - info->flash_id = FLASH_UNKNOWN; - info->sector_count = 0; - info->size = 0; - break; - } - - /* Strataflash is configurable to 8/16bit Bus, - * but the Query-Structure is Word-orientated */ - if (info->flash_id != FLASH_UNKNOWN) { - switch ((FPW)addr[2]) { - case (FPW)INTEL_ID_28F128J3: - info->flash_id += FLASH_28F128J3A; - info->sector_count = 128; - info->size = 0x01000000; - for( i = 0; i < info->sector_count; i++ ) - info->start[i] = (ulong)addr + (i * 0x20000); - break; /* => Intel Strataflash 16MB */ - default: - printf("Flash_id != %xd\n", (FPW)addr[2]); - info->flash_id = FLASH_UNKNOWN; - info->sector_count = 0; - info->size = 0; - return (0); /* => no or unknown flash */ - } - } - - /* Put FLASH back in read mode */ - flash_reset(info); - - return (info->size); -} - -/*----------------------------------------------------------------------- - */ - -int flash_erase (flash_info_t *info, int s_first, int s_last) -{ - FPWV *addr; - int flag, prot, sect; - ulong start, now, last; - int rcode = 0; - - 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; - } - - switch (info->flash_id & FLASH_TYPEMASK) { - case FLASH_28F128J3A: - break; - case FLASH_UNKNOWN: - default: - printf ("Can't erase unknown flash type %08lx - aborted\n", - info->flash_id); - 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!", - prot); - - printf ("\n"); - last = get_timer(0); - - /* Start erase on unprotected sectors */ - for (sect = s_first; sect <= s_last && rcode == 0; sect++) { - - if (info->protect[sect] != 0) /* protected, skip it */ - continue; - - /* Disable interrupts which might cause a timeout here */ - flag = disable_interrupts(); - - addr = (FPWV *)(info->start[sect]); - *addr = (FPW) INTEL_CLEAR; /* clear status register */ - *addr = (FPW) INTEL_ERASE; /* erase setup */ - *addr = (FPW) INTEL_CONFIRM; /* erase confirm */ - - /* re-enable interrupts if necessary */ - if (flag) - enable_interrupts(); - - start = get_timer(0); - - /* wait at least 80us for Intel - let's wait 1 ms */ - udelay (1000); - - while ((*addr & (FPW) INTEL_FINISHED) != (FPW) INTEL_FINISHED) { - if ((now = get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) { - printf ("Timeout\n"); - *addr = (FPW) INTEL_SUSPEND;/* suspend erase */ - flash_reset(info); /* reset to read mode */ - rcode = 1; /* failed */ - break; - } - - /* show that we're waiting */ - if ((get_timer(last)) > CONFIG_SYS_HZ) { /* every second */ - putc ('.'); - last = get_timer(0); - } - } - - flash_reset(info); /* reset to read mode */ - } - - printf (" done\n"); - return rcode; -} - -/*----------------------------------------------------------------------- - * 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) -{ - FPW data = 0; /* 16 or 32 bit word, matches flash bus width on MPC8XX */ - int bytes; /* number of bytes to program in current word */ - int left; /* number of bytes left to program */ - int i, res; - - for (left = cnt, res = 0; - left > 0 && res == 0; - addr += sizeof(data), left -= sizeof(data) - bytes) { - - bytes = addr & (sizeof(data) - 1); - addr &= ~(sizeof(data) - 1); - - /* combine source and destination data so can program - * an entire word of 16 or 32 bits */ - for (i = 0; i < sizeof(data); i++) { - data <<= 8; - if (i < bytes || i - bytes >= left ) - data += *((uchar *)addr + i); - else - data += *src++; - } - - /* write one word to the flash */ - switch (info->flash_id & FLASH_VENDMASK) { - case FLASH_MAN_INTEL: - res = write_data(info, (FPWV *)addr, data); - break; - default: - /* unknown flash type, error! */ - printf ("missing or unknown FLASH type\n"); - res = 1; /* not really a timeout, but gives error */ - break; - } - } - - return (res); -} - -/*----------------------------------------------------------------------- - * Write a word or halfword to Flash, returns: - * 0 - OK - * 1 - write timeout - * 2 - Flash not erased - */ -static int write_data (flash_info_t *info, FPWV *dest, FPW data) -{ - FPWV *addr = dest; - ulong status; - ulong start; - int flag; - - /* Check if Flash is (sufficiently) erased */ - if ((*addr & data) != data) { - printf ("not erased at %08lx (%x)\n", (ulong) addr, *addr); - return (2); - } - /* Disable interrupts which might cause a timeout here */ - flag = disable_interrupts (); - - *addr = (FPW) INTEL_PROGRAM; /* write setup */ - *addr = data; - - /* arm simple, non interrupt dependent timer */ - start = get_timer(0); - - /* wait while polling the status register */ - while (((status = *addr) & (FPW) INTEL_FINISHED) != (FPW) INTEL_FINISHED) { - if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) { - *addr = (FPW) INTEL_RESET; /* restore read mode */ - return (1); - } - } - - *addr = (FPW) INTEL_RESET; /* restore read mode */ - if (flag) - enable_interrupts(); - - return (0); -} - - -/*----------------------------------------------------------------------- - * Set/Clear sector's lock bit, returns: - * 0 - OK - * 1 - Error (timeout, voltage problems, etc.) - */ -int flash_real_protect (flash_info_t * info, long sector, int prot) -{ - ulong start; - int i; - int rc = 0; - FPWV *addr = (FPWV *) (info->start[sector]); - int flag = disable_interrupts (); - - *addr = INTEL_CLEAR; /* Clear status register */ - if (prot) { /* Set sector lock bit */ - *addr = INTEL_LOCKBIT; /* Sector lock bit */ - *addr = INTEL_PROTECT; /* set */ - } else { /* Clear sector lock bit */ - *addr = INTEL_LOCKBIT; /* All sectors lock bits */ - *addr = INTEL_CONFIRM; /* clear */ - } - - start = get_timer (0); - - while ((*addr & INTEL_FINISHED) != INTEL_FINISHED) { - if (get_timer (start) > CONFIG_SYS_FLASH_UNLOCK_TOUT) { - printf ("Flash lock bit operation timed out\n"); - rc = 1; - break; - } - } - - if (*addr != INTEL_OK) { - printf ("Flash lock bit operation failed at %08X, CSR=%08X\n", - (uint) addr, (uint) * addr); - rc = 1; - } - - if (!rc) - info->protect[sector] = prot; - - /* - * Clear lock bit command clears all sectors lock bits, so - * we have to restore lock bits of protected sectors. - */ - if (!prot) { - for (i = 0; i < info->sector_count; i++) { - if (info->protect[i]) { - start = get_timer (0); - addr = (FPWV *) (info->start[i]); - *addr = INTEL_LOCKBIT; /* Sector lock bit */ - *addr = INTEL_PROTECT; /* set */ - while ((*addr & INTEL_FINISHED) != - INTEL_FINISHED) { - if (get_timer (start) > - CONFIG_SYS_FLASH_UNLOCK_TOUT) { - printf ("Flash lock bit operation timed out\n"); - rc = 1; - break; - } - } - } - } - } - - if (flag) - enable_interrupts (); - - *addr = INTEL_RESET; /* Reset to read array mode */ - - return rc; -} - - -/* - * This function gets the u-boot flash sector protection status - * (flash_info_t.protect[]) in sync with the sector protection - * status stored in hardware. - */ -static void flash_sync_real_protect (flash_info_t * info) -{ - int i; - switch (info->flash_id & FLASH_TYPEMASK) { - case FLASH_28F128J3A: - for (i = 0; i < info->sector_count; ++i) { - info->protect[i] = intel_sector_protected(info, i); - } - break; - default: - /* no h/w protect support */ - break; - } -} - - -/* - * checks if "sector" in bank "info" is protected. Should work on intel - * strata flash chips 28FxxxJ3x in 8-bit mode. - * Returns 1 if sector is protected (or timed-out while trying to read - * protection status), 0 if it is not. - */ -static unsigned char intel_sector_protected (flash_info_t *info, ushort sector) -{ - FPWV *addr; - FPWV *lock_conf_addr; - ulong start; - unsigned char ret; - - /* - * first, wait for the WSM to be finished. The rationale for - * waiting for the WSM to become idle for at most - * CONFIG_SYS_FLASH_ERASE_TOUT is as follows. The WSM can be busy - * because of: (1) erase, (2) program or (3) lock bit - * configuration. So we just wait for the longest timeout of - * the (1)-(3), i.e. the erase timeout. - */ - - /* wait at least 35ns (W12) before issuing Read Status Register */ - udelay(1); - addr = (FPWV *) info->start[sector]; - *addr = (FPW) INTEL_STATUS; - - start = get_timer (0); - while ((*addr & (FPW) INTEL_FINISHED) != (FPW) INTEL_FINISHED) { - if (get_timer (start) > CONFIG_SYS_FLASH_ERASE_TOUT) { - *addr = (FPW) INTEL_RESET; /* restore read mode */ - printf("WSM busy too long, can't get prot status\n"); - return 1; - } - } - - /* issue the Read Identifier Codes command */ - *addr = (FPW) INTEL_READID; - - /* wait at least 35ns (W12) before reading */ - udelay(1); - - /* Intel example code uses offset of 4 for 8-bit flash */ - lock_conf_addr = (FPWV *) info->start[sector] + 4; - ret = (*lock_conf_addr & (FPW) INTEL_PROTECT) ? 1 : 0; - - /* put flash back in read mode */ - *addr = (FPW) INTEL_RESET; - - return ret; -} |