mirror of
https://github.com/AsahiLinux/u-boot
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903 lines
24 KiB
C
903 lines
24 KiB
C
/**
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* @file flash.c
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*/
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/*
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* (C) Copyright 2003
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* AMIRIX Systems Inc.
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*
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* Originated from ppcboot-2.0.0/board/esd/cpci440/strataflash.c
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*
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* (C) Copyright 2002
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* Brad Kemp, Seranoa Networks, Brad.Kemp@seranoa.com
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include <common.h>
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#include <asm/processor.h>
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#undef DEBUG_FLASH
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/*
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* This file implements a Common Flash Interface (CFI) driver for ppcboot.
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* The width of the port and the width of the chips are determined at initialization.
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* These widths are used to calculate the address for access CFI data structures.
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* It has been tested on an Intel Strataflash implementation.
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*
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* References
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* JEDEC Standard JESD68 - Common Flash Interface (CFI)
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* JEDEC Standard JEP137-A Common Flash Interface (CFI) ID Codes
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* Intel Application Note 646 Common Flash Interface (CFI) and Command Sets
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* Intel 290667-008 3 Volt Intel StrataFlash Memory datasheet
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*
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* TODO
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* Use Primary Extended Query table (PRI) and Alternate Algorithm Query Table (ALT) to determine if protection is available
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* Add support for other command sets Use the PRI and ALT to determine command set
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* Verify erase and program timeouts.
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*/
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#define FLASH_CMD_CFI 0x98
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#define FLASH_CMD_READ_ID 0x90
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#define FLASH_CMD_RESET 0xff
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#define FLASH_CMD_BLOCK_ERASE 0x20
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#define FLASH_CMD_ERASE_CONFIRM 0xD0
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#define FLASH_CMD_WRITE 0x40
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#define FLASH_CMD_PROTECT 0x60
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#define FLASH_CMD_PROTECT_SET 0x01
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#define FLASH_CMD_PROTECT_CLEAR 0xD0
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#define FLASH_CMD_CLEAR_STATUS 0x50
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#define FLASH_CMD_WRITE_TO_BUFFER 0xE8
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#define FLASH_CMD_WRITE_BUFFER_CONFIRM 0xD0
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#define FLASH_STATUS_DONE 0x80
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#define FLASH_STATUS_ESS 0x40
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#define FLASH_STATUS_ECLBS 0x20
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#define FLASH_STATUS_PSLBS 0x10
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#define FLASH_STATUS_VPENS 0x08
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#define FLASH_STATUS_PSS 0x04
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#define FLASH_STATUS_DPS 0x02
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#define FLASH_STATUS_R 0x01
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#define FLASH_STATUS_PROTECT 0x01
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#define FLASH_OFFSET_CFI 0x55
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#define FLASH_OFFSET_CFI_RESP 0x10
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#define FLASH_OFFSET_WTOUT 0x1F
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#define FLASH_OFFSET_WBTOUT 0x20
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#define FLASH_OFFSET_ETOUT 0x21
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#define FLASH_OFFSET_CETOUT 0x22
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#define FLASH_OFFSET_WMAX_TOUT 0x23
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#define FLASH_OFFSET_WBMAX_TOUT 0x24
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#define FLASH_OFFSET_EMAX_TOUT 0x25
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#define FLASH_OFFSET_CEMAX_TOUT 0x26
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#define FLASH_OFFSET_SIZE 0x27
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#define FLASH_OFFSET_INTERFACE 0x28
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#define FLASH_OFFSET_BUFFER_SIZE 0x2A
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#define FLASH_OFFSET_NUM_ERASE_REGIONS 0x2C
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#define FLASH_OFFSET_ERASE_REGIONS 0x2D
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#define FLASH_OFFSET_PROTECT 0x02
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#define FLASH_OFFSET_USER_PROTECTION 0x85
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#define FLASH_OFFSET_INTEL_PROTECTION 0x81
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#define FLASH_MAN_CFI 0x01000000
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typedef union {
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unsigned char c;
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unsigned short w;
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unsigned long l;
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} cfiword_t;
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typedef union {
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unsigned char *cp;
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unsigned short *wp;
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unsigned long *lp;
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} cfiptr_t;
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#define NUM_ERASE_REGIONS 4
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flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */
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/*-----------------------------------------------------------------------
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* Functions
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*/
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static void flash_add_byte (flash_info_t * info, cfiword_t * cword, uchar c);
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static void flash_make_cmd (flash_info_t * info, uchar cmd, void *cmdbuf);
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static void flash_write_cmd (flash_info_t * info, int sect, uchar offset,
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uchar cmd);
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static int flash_isequal (flash_info_t * info, int sect, uchar offset,
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uchar cmd);
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static int flash_isset (flash_info_t * info, int sect, uchar offset,
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uchar cmd);
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static int flash_detect_cfi (flash_info_t * info);
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static ulong flash_get_size (ulong base, int banknum);
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static int flash_write_cfiword (flash_info_t * info, ulong dest,
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cfiword_t cword);
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static int flash_full_status_check (flash_info_t * info, ulong sector,
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ulong tout, char *prompt);
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#ifdef CFG_FLASH_USE_BUFFER_WRITE
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static int flash_write_cfibuffer (flash_info_t * info, ulong dest, uchar * cp,
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int len);
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#endif
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/*-----------------------------------------------------------------------
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* create an address based on the offset and the port width
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*/
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uchar *flash_make_addr (flash_info_t * info, int sect, int offset)
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{
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return ((uchar *) (info->start[sect] + (offset * info->chipwidth)));
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}
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/*-----------------------------------------------------------------------
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* read a character at a port width address
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*/
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uchar flash_read_uchar (flash_info_t * info, uchar offset)
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{
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if (info->portwidth == FLASH_CFI_8BIT) {
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volatile uchar *cp;
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uchar c;
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cp = flash_make_addr (info, 0, offset);
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c = *cp;
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#ifdef DEBUG_FLASH
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printf ("flash_read_uchar offset=%04x ptr=%08x c=%02x\n",
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offset, (unsigned int) cp, c);
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#endif
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return (c);
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} else if (info->portwidth == FLASH_CFI_16BIT) {
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volatile ushort *sp;
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ushort s;
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uchar c;
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sp = (ushort *) flash_make_addr (info, 0, offset);
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s = *sp;
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c = (uchar) s;
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#ifdef DEBUG_FLASH
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printf ("flash_read_uchar offset=%04x ptr=%08x s=%04x c=%02x\n", offset, (unsigned int) sp, s, c);
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#endif
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return (c);
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}
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return 0;
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}
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/*-----------------------------------------------------------------------
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* read a short word by swapping for ppc format.
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*/
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ushort flash_read_ushort (flash_info_t * info, int sect, uchar offset)
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{
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if (info->portwidth == FLASH_CFI_8BIT) {
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volatile uchar *cp;
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uchar c0, c1;
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ushort s;
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cp = flash_make_addr (info, 0, offset);
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c1 = cp[2];
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c0 = cp[0];
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s = c1 << 8 | c0;
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#ifdef DEBUG_FLASH
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printf ("flash_read_ushort offset=%04x ptr=%08x c1=%02x c0=%02x s=%04x\n", offset, (unsigned int) cp, c1, c0, s);
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#endif
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return (s);
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} else if (info->portwidth == FLASH_CFI_16BIT) {
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volatile ushort *sp;
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ushort s;
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uchar c0, c1;
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sp = (ushort *) flash_make_addr (info, 0, offset);
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s = *sp;
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c1 = (uchar) sp[1];
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c0 = (uchar) sp[0];
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s = c1 << 8 | c0;
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#ifdef DEBUG_FLASH
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printf ("flash_read_ushort offset=%04x ptr=%08x c1=%02x c0=%02x s=%04x\n", offset, (unsigned int) sp, c1, c0, s);
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#endif
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return (s);
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}
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return 0;
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}
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/*-----------------------------------------------------------------------
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* read a long word by picking the least significant byte of each maiximum
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* port size word. Swap for ppc format.
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*/
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ulong flash_read_long (flash_info_t * info, int sect, uchar offset)
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{
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if (info->portwidth == FLASH_CFI_8BIT) {
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volatile uchar *cp;
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uchar c0, c1, c2, c3;
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ulong l;
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cp = flash_make_addr (info, 0, offset);
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c3 = cp[6];
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c2 = cp[4];
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c1 = cp[2];
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c0 = cp[0];
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l = c3 << 24 | c2 << 16 | c1 << 8 | c0;
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#ifdef DEBUG_FLASH
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printf ("flash_read_long offset=%04x ptr=%08x c3=%02x c2=%02x c1=%02x c0=%02x l=%08x\n", offset, (unsigned int) cp, c3, c2, c1, c0, l);
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#endif
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return (l);
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} else if (info->portwidth == FLASH_CFI_16BIT) {
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volatile ushort *sp;
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uchar c0, c1, c2, c3;
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ulong l;
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sp = (ushort *) flash_make_addr (info, 0, offset);
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c3 = (uchar) sp[3];
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c2 = (uchar) sp[2];
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c1 = (uchar) sp[1];
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c0 = (uchar) sp[0];
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l = c3 << 24 | c2 << 16 | c1 << 8 | c0;
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#ifdef DEBUG_FLASH
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printf ("flash_read_long offset=%04x ptr=%08x c3=%02x c2=%02x c1=%02x c0=%02x l=%08x\n", offset, (unsigned int) sp, c3, c2, c1, c0, l);
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#endif
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return (l);
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}
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return 0;
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}
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/*-----------------------------------------------------------------------
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*/
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unsigned long flash_init (void)
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{
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unsigned long size;
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size = 0;
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flash_info[0].flash_id = FLASH_UNKNOWN;
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flash_info[0].portwidth = FLASH_CFI_16BIT;
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flash_info[0].chipwidth = FLASH_CFI_16BIT;
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size += flash_info[0].size = flash_get_size (CFG_PROGFLASH_BASE, 0);
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if (flash_info[0].flash_id == FLASH_UNKNOWN) {
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printf ("## Unknown FLASH on Bank %d - Size = 0x%08lx = %ld MB\n", 1, flash_info[0].size, flash_info[0].size << 20);
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};
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flash_info[1].flash_id = FLASH_UNKNOWN;
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flash_info[1].portwidth = FLASH_CFI_8BIT;
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flash_info[1].chipwidth = FLASH_CFI_16BIT;
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size += flash_info[1].size = flash_get_size (CFG_CONFFLASH_BASE, 1);
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if (flash_info[1].flash_id == FLASH_UNKNOWN) {
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printf ("## Unknown FLASH on Bank %d - Size = 0x%08lx = %ld MB\n", 2, flash_info[1].size, flash_info[1].size << 20);
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};
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return (size);
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}
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/*-----------------------------------------------------------------------
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*/
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int flash_erase (flash_info_t * info, int s_first, int s_last)
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{
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int rcode = 0;
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int prot;
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int sect;
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if (info->flash_id != FLASH_MAN_CFI) {
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printf ("Can't erase unknown flash type - aborted\n");
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return 1;
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}
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if ((s_first < 0) || (s_first > s_last)) {
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printf ("- no sectors to erase\n");
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return 1;
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}
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prot = 0;
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for (sect = s_first; sect <= s_last; ++sect) {
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if (info->protect[sect]) {
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prot++;
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}
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}
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if (prot) {
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printf ("- Warning: %d protected sectors will not be erased!\n", prot);
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} else {
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printf ("\n");
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}
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for (sect = s_first; sect <= s_last; sect++) {
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if (info->protect[sect] == 0) { /* not protected */
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flash_write_cmd (info, sect, 0,
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FLASH_CMD_CLEAR_STATUS);
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flash_write_cmd (info, sect, 0,
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FLASH_CMD_BLOCK_ERASE);
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flash_write_cmd (info, sect, 0,
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FLASH_CMD_ERASE_CONFIRM);
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if (flash_full_status_check
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(info, sect, info->erase_blk_tout, "erase")) {
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rcode = 1;
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} else
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printf (".");
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}
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}
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printf (" done\n");
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return rcode;
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}
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/*-----------------------------------------------------------------------
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*/
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void flash_print_info (flash_info_t * info)
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{
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int i;
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if (info->flash_id != FLASH_MAN_CFI) {
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printf ("missing or unknown FLASH type\n");
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return;
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}
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printf ("CFI conformant FLASH (x%d device in x%d mode)",
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(info->chipwidth << 3), (info->portwidth << 3));
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printf (" Size: %ld MB in %d Sectors\n",
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info->size >> 20, info->sector_count);
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printf (" Erase timeout %ld ms, write timeout %ld ms, buffer write timeout %ld ms, buffer size %d\n", info->erase_blk_tout, info->write_tout, info->buffer_write_tout, info->buffer_size);
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printf (" Sector Start Addresses:");
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for (i = 0; i < info->sector_count; ++i) {
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if ((i % 5) == 0)
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printf ("\n");
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printf (" %08lX%5s",
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info->start[i], info->protect[i] ? " (RO)" : " ");
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}
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printf ("\n");
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return;
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}
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/*-----------------------------------------------------------------------
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* Copy memory to flash, returns:
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* 0 - OK
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* 1 - write timeout
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* 2 - Flash not erased
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*/
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int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
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{
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ulong wp;
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ulong cp;
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int aln;
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cfiword_t cword;
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int i, rc;
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/* get lower aligned address */
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wp = (addr & ~(info->portwidth - 1));
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/* handle unaligned start */
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if ((aln = addr - wp) != 0) {
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cword.l = 0;
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cp = wp;
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for (i = 0; i < aln; ++i, ++cp)
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flash_add_byte (info, &cword, (*(uchar *) cp));
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for (; (i < info->portwidth) && (cnt > 0); i++) {
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flash_add_byte (info, &cword, *src++);
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cnt--;
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cp++;
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}
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for (; (cnt == 0) && (i < info->portwidth); ++i, ++cp)
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flash_add_byte (info, &cword, (*(uchar *) cp));
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if ((rc = flash_write_cfiword (info, wp, cword)) != 0)
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return rc;
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wp = cp;
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}
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#ifdef CFG_FLASH_USE_BUFFER_WRITE
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while (cnt >= info->portwidth) {
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i = info->buffer_size > cnt ? cnt : info->buffer_size;
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if ((rc = flash_write_cfibuffer (info, wp, src, i)) != ERR_OK)
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return rc;
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wp += i;
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src += i;
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cnt -= i;
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}
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#else
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/* handle the aligned part */
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while (cnt >= info->portwidth) {
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cword.l = 0;
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for (i = 0; i < info->portwidth; i++) {
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flash_add_byte (info, &cword, *src++);
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}
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if ((rc = flash_write_cfiword (info, wp, cword)) != 0)
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return rc;
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wp += info->portwidth;
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cnt -= info->portwidth;
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}
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#endif /* CFG_FLASH_USE_BUFFER_WRITE */
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if (cnt == 0) {
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return (0);
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}
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/*
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* handle unaligned tail bytes
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*/
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cword.l = 0;
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for (i = 0, cp = wp; (i < info->portwidth) && (cnt > 0); ++i, ++cp) {
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flash_add_byte (info, &cword, *src++);
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--cnt;
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}
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for (; i < info->portwidth; ++i, ++cp) {
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flash_add_byte (info, &cword, (*(uchar *) cp));
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}
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return flash_write_cfiword (info, wp, cword);
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}
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/*-----------------------------------------------------------------------
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*/
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int flash_real_protect (flash_info_t * info, long sector, int prot)
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{
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int retcode = 0;
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flash_write_cmd (info, sector, 0, FLASH_CMD_CLEAR_STATUS);
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flash_write_cmd (info, sector, 0, FLASH_CMD_PROTECT);
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if (prot)
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flash_write_cmd (info, sector, 0, FLASH_CMD_PROTECT_SET);
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else
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flash_write_cmd (info, sector, 0, FLASH_CMD_PROTECT_CLEAR);
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if ((retcode =
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flash_full_status_check (info, sector, info->erase_blk_tout,
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prot ? "protect" : "unprotect")) == 0) {
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info->protect[sector] = prot;
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/* Intel's unprotect unprotects all locking */
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if (prot == 0) {
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int i;
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for (i = 0; i < info->sector_count; i++) {
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if (info->protect[i])
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flash_real_protect (info, i, 1);
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}
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}
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}
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return retcode;
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}
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/*-----------------------------------------------------------------------
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* wait for XSR.7 to be set. Time out with an error if it does not.
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* This routine does not set the flash to read-array mode.
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*/
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static int flash_status_check (flash_info_t * info, ulong sector, ulong tout,
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char *prompt)
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{
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ulong start;
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/* Wait for command completion */
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start = get_timer (0);
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while (!flash_isset (info, sector, 0, FLASH_STATUS_DONE)) {
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if (get_timer (start) > info->erase_blk_tout) {
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printf ("Flash %s timeout at address %lx\n", prompt,
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info->start[sector]);
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flash_write_cmd (info, sector, 0, FLASH_CMD_RESET);
|
|
return ERR_TIMOUT;
|
|
}
|
|
}
|
|
return ERR_OK;
|
|
}
|
|
|
|
/*-----------------------------------------------------------------------
|
|
* Wait for XSR.7 to be set, if it times out print an error, otherwise do a full status check.
|
|
* This routine sets the flash to read-array mode.
|
|
*/
|
|
static int flash_full_status_check (flash_info_t * info, ulong sector,
|
|
ulong tout, char *prompt)
|
|
{
|
|
int retcode;
|
|
|
|
retcode = flash_status_check (info, sector, tout, prompt);
|
|
if ((retcode == ERR_OK)
|
|
&& !flash_isequal (info, sector, 0, FLASH_STATUS_DONE)) {
|
|
retcode = ERR_INVAL;
|
|
printf ("Flash %s error at address %lx\n", prompt,
|
|
info->start[sector]);
|
|
if (flash_isset
|
|
(info, sector, 0,
|
|
FLASH_STATUS_ECLBS | FLASH_STATUS_PSLBS)) {
|
|
printf ("Command Sequence Error.\n");
|
|
} else if (flash_isset (info, sector, 0, FLASH_STATUS_ECLBS)) {
|
|
printf ("Block Erase Error.\n");
|
|
retcode = ERR_NOT_ERASED;
|
|
} else if (flash_isset (info, sector, 0, FLASH_STATUS_PSLBS)) {
|
|
printf ("Locking Error\n");
|
|
}
|
|
if (flash_isset (info, sector, 0, FLASH_STATUS_DPS)) {
|
|
printf ("Block locked.\n");
|
|
retcode = ERR_PROTECTED;
|
|
}
|
|
if (flash_isset (info, sector, 0, FLASH_STATUS_VPENS))
|
|
printf ("Vpp Low Error.\n");
|
|
}
|
|
flash_write_cmd (info, sector, 0, FLASH_CMD_RESET);
|
|
return retcode;
|
|
}
|
|
|
|
/*-----------------------------------------------------------------------
|
|
*/
|
|
static void flash_add_byte (flash_info_t * info, cfiword_t * cword, uchar c)
|
|
{
|
|
switch (info->portwidth) {
|
|
case FLASH_CFI_8BIT:
|
|
cword->c = c;
|
|
break;
|
|
case FLASH_CFI_16BIT:
|
|
cword->w = (cword->w << 8) | c;
|
|
break;
|
|
case FLASH_CFI_32BIT:
|
|
cword->l = (cword->l << 8) | c;
|
|
}
|
|
}
|
|
|
|
/*-----------------------------------------------------------------------
|
|
* make a proper sized command based on the port and chip widths
|
|
*/
|
|
static void flash_make_cmd (flash_info_t * info, uchar cmd, void *cmdbuf)
|
|
{
|
|
/*int i; */
|
|
uchar *cp = (uchar *) cmdbuf;
|
|
|
|
/* for(i=0; i< info->portwidth; i++) */
|
|
/* *cp++ = ((i+1) % info->chipwidth) ? '\0':cmd; */
|
|
if (info->portwidth == FLASH_CFI_8BIT
|
|
&& info->chipwidth == FLASH_CFI_16BIT) {
|
|
cp[0] = cmd;
|
|
} else if (info->portwidth == FLASH_CFI_16BIT
|
|
&& info->chipwidth == FLASH_CFI_16BIT) {
|
|
cp[0] = '\0';
|
|
cp[1] = cmd;
|
|
};
|
|
}
|
|
|
|
/*
|
|
* Write a proper sized command to the correct address
|
|
*/
|
|
static void flash_write_cmd (flash_info_t * info, int sect, uchar offset,
|
|
uchar cmd)
|
|
{
|
|
|
|
volatile cfiptr_t addr;
|
|
cfiword_t cword;
|
|
|
|
addr.cp = flash_make_addr (info, sect, offset);
|
|
flash_make_cmd (info, cmd, &cword);
|
|
switch (info->portwidth) {
|
|
case FLASH_CFI_8BIT:
|
|
*addr.cp = cword.c;
|
|
break;
|
|
case FLASH_CFI_16BIT:
|
|
*addr.wp = cword.w;
|
|
break;
|
|
case FLASH_CFI_32BIT:
|
|
*addr.lp = cword.l;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*-----------------------------------------------------------------------
|
|
*/
|
|
static int flash_isequal (flash_info_t * info, int sect, uchar offset,
|
|
uchar cmd)
|
|
{
|
|
cfiptr_t cptr;
|
|
cfiword_t cword;
|
|
int retval;
|
|
|
|
cptr.cp = flash_make_addr (info, sect, offset);
|
|
flash_make_cmd (info, cmd, &cword);
|
|
switch (info->portwidth) {
|
|
case FLASH_CFI_8BIT:
|
|
retval = (cptr.cp[0] == cword.c);
|
|
break;
|
|
case FLASH_CFI_16BIT:
|
|
retval = (cptr.wp[0] == cword.w);
|
|
break;
|
|
case FLASH_CFI_32BIT:
|
|
retval = (cptr.lp[0] == cword.l);
|
|
break;
|
|
default:
|
|
retval = 0;
|
|
break;
|
|
}
|
|
return retval;
|
|
}
|
|
|
|
/*-----------------------------------------------------------------------
|
|
*/
|
|
static int flash_isset (flash_info_t * info, int sect, uchar offset,
|
|
uchar cmd)
|
|
{
|
|
cfiptr_t cptr;
|
|
cfiword_t cword;
|
|
int retval;
|
|
|
|
cptr.cp = flash_make_addr (info, sect, offset);
|
|
flash_make_cmd (info, cmd, &cword);
|
|
switch (info->portwidth) {
|
|
case FLASH_CFI_8BIT:
|
|
retval = ((cptr.cp[0] & cword.c) == cword.c);
|
|
break;
|
|
case FLASH_CFI_16BIT:
|
|
retval = ((cptr.wp[0] & cword.w) == cword.w);
|
|
break;
|
|
case FLASH_CFI_32BIT:
|
|
retval = ((cptr.lp[0] & cword.l) == cword.l);
|
|
break;
|
|
default:
|
|
retval = 0;
|
|
break;
|
|
}
|
|
return retval;
|
|
}
|
|
|
|
/*-----------------------------------------------------------------------
|
|
* detect if flash is compatible with the Common Flash Interface (CFI)
|
|
* http://www.jedec.org/download/search/jesd68.pdf
|
|
*
|
|
*/
|
|
static int flash_detect_cfi (flash_info_t * info)
|
|
{
|
|
|
|
#if 0
|
|
for (info->portwidth = FLASH_CFI_8BIT;
|
|
info->portwidth <= FLASH_CFI_32BIT; info->portwidth <<= 1) {
|
|
for (info->chipwidth = FLASH_CFI_BY8;
|
|
info->chipwidth <= info->portwidth;
|
|
info->chipwidth <<= 1) {
|
|
flash_write_cmd (info, 0, 0, FLASH_CMD_RESET);
|
|
flash_write_cmd (info, 0, FLASH_OFFSET_CFI,
|
|
FLASH_CMD_CFI);
|
|
if (flash_isequal
|
|
(info, 0, FLASH_OFFSET_CFI_RESP, 'Q')
|
|
&& flash_isequal (info, 0,
|
|
FLASH_OFFSET_CFI_RESP + 1, 'R')
|
|
&& flash_isequal (info, 0,
|
|
FLASH_OFFSET_CFI_RESP + 2, 'Y'))
|
|
return 1;
|
|
}
|
|
}
|
|
#endif
|
|
flash_write_cmd (info, 0, 0, FLASH_CMD_RESET);
|
|
flash_write_cmd (info, 0, FLASH_OFFSET_CFI, FLASH_CMD_CFI);
|
|
if (flash_isequal (info, 0, FLASH_OFFSET_CFI_RESP, 'Q') &&
|
|
flash_isequal (info, 0, FLASH_OFFSET_CFI_RESP + 1, 'R') &&
|
|
flash_isequal (info, 0, FLASH_OFFSET_CFI_RESP + 2, 'Y')) {
|
|
return 1;
|
|
} else {
|
|
return 0;
|
|
};
|
|
}
|
|
|
|
/*
|
|
* The following code cannot be run from FLASH!
|
|
*
|
|
*/
|
|
static ulong flash_get_size (ulong base, int banknum)
|
|
{
|
|
flash_info_t *info = &flash_info[banknum];
|
|
int i, j;
|
|
int sect_cnt;
|
|
unsigned long sector;
|
|
unsigned long tmp;
|
|
int size_ratio;
|
|
uchar num_erase_regions;
|
|
int erase_region_size;
|
|
int erase_region_count;
|
|
|
|
info->start[0] = base;
|
|
|
|
if (flash_detect_cfi (info)) {
|
|
#ifdef DEBUG_FLASH
|
|
printf ("portwidth=%d chipwidth=%d\n", info->portwidth, info->chipwidth); /* test-only */
|
|
#endif
|
|
size_ratio = 1; /* info->portwidth / info->chipwidth; */
|
|
num_erase_regions =
|
|
flash_read_uchar (info,
|
|
FLASH_OFFSET_NUM_ERASE_REGIONS);
|
|
#ifdef DEBUG_FLASH
|
|
printf ("found %d erase regions\n", num_erase_regions);
|
|
#endif
|
|
sect_cnt = 0;
|
|
sector = base;
|
|
for (i = 0; i < num_erase_regions; i++) {
|
|
if (i > NUM_ERASE_REGIONS) {
|
|
printf ("%d erase regions found, only %d used\n", num_erase_regions, NUM_ERASE_REGIONS);
|
|
break;
|
|
}
|
|
tmp = flash_read_long (info, 0,
|
|
FLASH_OFFSET_ERASE_REGIONS);
|
|
erase_region_count = (tmp & 0xffff) + 1;
|
|
tmp >>= 16;
|
|
erase_region_size =
|
|
(tmp & 0xffff) ? ((tmp & 0xffff) * 256) : 128;
|
|
for (j = 0; j < erase_region_count; j++) {
|
|
info->start[sect_cnt] = sector;
|
|
sector += (erase_region_size * size_ratio);
|
|
info->protect[sect_cnt] =
|
|
flash_isset (info, sect_cnt,
|
|
FLASH_OFFSET_PROTECT,
|
|
FLASH_STATUS_PROTECT);
|
|
sect_cnt++;
|
|
}
|
|
}
|
|
|
|
info->sector_count = sect_cnt;
|
|
/* multiply the size by the number of chips */
|
|
info->size =
|
|
(1 << flash_read_uchar (info, FLASH_OFFSET_SIZE)) *
|
|
size_ratio;
|
|
info->buffer_size =
|
|
(1 <<
|
|
flash_read_ushort (info, 0,
|
|
FLASH_OFFSET_BUFFER_SIZE));
|
|
tmp = 1 << flash_read_uchar (info, FLASH_OFFSET_ETOUT);
|
|
info->erase_blk_tout =
|
|
(tmp *
|
|
(1 <<
|
|
flash_read_uchar (info, FLASH_OFFSET_EMAX_TOUT)));
|
|
tmp = 1 << flash_read_uchar (info, FLASH_OFFSET_WBTOUT);
|
|
info->buffer_write_tout =
|
|
(tmp *
|
|
(1 <<
|
|
flash_read_uchar (info, FLASH_OFFSET_WBMAX_TOUT)));
|
|
tmp = 1 << flash_read_uchar (info, FLASH_OFFSET_WTOUT);
|
|
info->write_tout =
|
|
(tmp *
|
|
(1 <<
|
|
flash_read_uchar (info,
|
|
FLASH_OFFSET_WMAX_TOUT))) / 1000;
|
|
info->flash_id = FLASH_MAN_CFI;
|
|
}
|
|
|
|
flash_write_cmd (info, 0, 0, FLASH_CMD_RESET);
|
|
return (info->size);
|
|
}
|
|
|
|
/*-----------------------------------------------------------------------
|
|
*/
|
|
static int flash_write_cfiword (flash_info_t * info, ulong dest,
|
|
cfiword_t cword)
|
|
{
|
|
|
|
cfiptr_t ctladdr;
|
|
cfiptr_t cptr;
|
|
int flag;
|
|
|
|
ctladdr.cp = flash_make_addr (info, 0, 0);
|
|
cptr.cp = (uchar *) dest;
|
|
|
|
/* Check if Flash is (sufficiently) erased */
|
|
switch (info->portwidth) {
|
|
case FLASH_CFI_8BIT:
|
|
flag = ((cptr.cp[0] & cword.c) == cword.c);
|
|
break;
|
|
case FLASH_CFI_16BIT:
|
|
flag = ((cptr.wp[0] & cword.w) == cword.w);
|
|
break;
|
|
case FLASH_CFI_32BIT:
|
|
flag = ((cptr.lp[0] & cword.l) == cword.l);
|
|
break;
|
|
default:
|
|
return 2;
|
|
}
|
|
if (!flag)
|
|
return 2;
|
|
|
|
/* Disable interrupts which might cause a timeout here */
|
|
flag = disable_interrupts ();
|
|
|
|
flash_write_cmd (info, 0, 0, FLASH_CMD_CLEAR_STATUS);
|
|
flash_write_cmd (info, 0, 0, FLASH_CMD_WRITE);
|
|
|
|
switch (info->portwidth) {
|
|
case FLASH_CFI_8BIT:
|
|
cptr.cp[0] = cword.c;
|
|
break;
|
|
case FLASH_CFI_16BIT:
|
|
cptr.wp[0] = cword.w;
|
|
break;
|
|
case FLASH_CFI_32BIT:
|
|
cptr.lp[0] = cword.l;
|
|
break;
|
|
}
|
|
|
|
/* re-enable interrupts if necessary */
|
|
if (flag)
|
|
enable_interrupts ();
|
|
|
|
return flash_full_status_check (info, 0, info->write_tout, "write");
|
|
}
|
|
|
|
#ifdef CFG_FLASH_USE_BUFFER_WRITE
|
|
|
|
/* loop through the sectors from the highest address
|
|
* when the passed address is greater or equal to the sector address
|
|
* we have a match
|
|
*/
|
|
static int find_sector (flash_info_t * info, ulong addr)
|
|
{
|
|
int sector;
|
|
|
|
for (sector = info->sector_count - 1; sector >= 0; sector--) {
|
|
if (addr >= info->start[sector])
|
|
break;
|
|
}
|
|
return sector;
|
|
}
|
|
|
|
static int flash_write_cfibuffer (flash_info_t * info, ulong dest, uchar * cp,
|
|
int len)
|
|
{
|
|
|
|
int sector;
|
|
int cnt;
|
|
int retcode;
|
|
volatile cfiptr_t src;
|
|
volatile cfiptr_t dst;
|
|
|
|
src.cp = cp;
|
|
dst.cp = (uchar *) dest;
|
|
sector = find_sector (info, dest);
|
|
flash_write_cmd (info, sector, 0, FLASH_CMD_CLEAR_STATUS);
|
|
flash_write_cmd (info, sector, 0, FLASH_CMD_WRITE_TO_BUFFER);
|
|
if ((retcode =
|
|
flash_status_check (info, sector, info->buffer_write_tout,
|
|
"write to buffer")) == ERR_OK) {
|
|
switch (info->portwidth) {
|
|
case FLASH_CFI_8BIT:
|
|
cnt = len;
|
|
break;
|
|
case FLASH_CFI_16BIT:
|
|
cnt = len >> 1;
|
|
break;
|
|
case FLASH_CFI_32BIT:
|
|
cnt = len >> 2;
|
|
break;
|
|
default:
|
|
return ERR_INVAL;
|
|
break;
|
|
}
|
|
flash_write_cmd (info, sector, 0, (uchar) cnt - 1);
|
|
while (cnt-- > 0) {
|
|
switch (info->portwidth) {
|
|
case FLASH_CFI_8BIT:
|
|
*dst.cp++ = *src.cp++;
|
|
break;
|
|
case FLASH_CFI_16BIT:
|
|
*dst.wp++ = *src.wp++;
|
|
break;
|
|
case FLASH_CFI_32BIT:
|
|
*dst.lp++ = *src.lp++;
|
|
break;
|
|
default:
|
|
return ERR_INVAL;
|
|
break;
|
|
}
|
|
}
|
|
flash_write_cmd (info, sector, 0,
|
|
FLASH_CMD_WRITE_BUFFER_CONFIRM);
|
|
retcode =
|
|
flash_full_status_check (info, sector,
|
|
info->buffer_write_tout,
|
|
"buffer write");
|
|
}
|
|
flash_write_cmd (info, sector, 0, FLASH_CMD_CLEAR_STATUS);
|
|
return retcode;
|
|
}
|
|
#endif /* CFG_USE_FLASH_BUFFER_WRITE */
|