now register_driver and register_device are for bus only usage. Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
1041 lines
26 KiB
C
1041 lines
26 KiB
C
/*
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* (C) Copyright 2002-2004
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* Brad Kemp, Seranoa Networks, Brad.Kemp@seranoa.com
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*
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* Copyright (C) 2003 Arabella Software Ltd.
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* Yuli Barcohen <yuli@arabellasw.com>
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*
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* Copyright (C) 2004
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* Ed Okerson
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*
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* Copyright (C) 2006
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* Tolunay Orkun <listmember@orkun.us>
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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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*
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*/
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/* The DEBUG define must be before common to enable debugging */
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/* #define DEBUG */
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#include <common.h>
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#include <asm/byteorder.h>
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#include <environment.h>
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#include <clock.h>
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#include <init.h>
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#include <malloc.h>
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#include <io.h>
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#include <errno.h>
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#include <progress.h>
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#include "cfi_flash.h"
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/*
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* This file implements a Common Flash Interface (CFI) driver for barebox.
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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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*
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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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* AMD CFI Specification, Release 2.0 December 1, 2001
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* AMD/Spansion Application Note: Migration from Single-byte to Three-byte
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* Device IDs, Publication Number 25538 Revision A, November 8, 2001
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*
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*/
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static uint flash_offset_cfi[2]={FLASH_OFFSET_CFI,FLASH_OFFSET_CFI_ALT};
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/*
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* Check if chip width is defined. If not, start detecting with 8bit.
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*/
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#ifndef CFG_FLASH_CFI_WIDTH
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#define CFG_FLASH_CFI_WIDTH FLASH_CFI_8BIT
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#endif
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/*
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* Functions
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*/
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static void flash_add_byte (struct flash_info *info, cfiword_t * cword, uchar c)
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{
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if (bankwidth_is_1(info)) {
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*cword = c;
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return;
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}
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#ifdef __BIG_ENDIAN
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*cword = (*cword << 8) | c;
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#elif defined __LITTLE_ENDIAN
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if (bankwidth_is_2(info))
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*cword = (*cword >> 8) | (u16)c << 8;
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else if (bankwidth_is_4(info))
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*cword = (*cword >> 8) | (u32)c << 24;
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else if (bankwidth_is_8(info))
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*cword = (*cword >> 8) | (u64)c << 56;
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#else
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#error "could not determine byte order"
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#endif
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}
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static int flash_write_cfiword (struct flash_info *info, ulong dest,
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cfiword_t cword)
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{
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void *dstaddr = (void *)dest;
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int flag;
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/* Check if Flash is (sufficiently) erased */
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if (bankwidth_is_1(info))
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flag = ((flash_read8(dstaddr) & cword) == cword);
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else if (bankwidth_is_2(info))
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flag = ((flash_read16(dstaddr) & cword) == cword);
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else if (bankwidth_is_4(info))
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flag = ((flash_read32(dstaddr) & cword) == cword);
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else if (bankwidth_is_8(info))
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flag = ((flash_read64(dstaddr) & cword) == cword);
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else
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return 2;
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if (!flag)
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return 2;
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info->cfi_cmd_set->flash_prepare_write(info);
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flash_write_word(info, cword, (void *)dest);
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return flash_status_check (info, find_sector (info, dest),
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info->write_tout, "write");
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}
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#ifdef DEBUG
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/*
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* Debug support
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*/
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void print_longlong (char *str, unsigned long long data)
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{
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int i;
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char *cp;
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cp = (unsigned char *) &data;
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for (i = 0; i < 8; i++)
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sprintf (&str[i * 2], "%2.2x", *cp++);
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}
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static void flash_printqry (struct cfi_qry *qry)
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{
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u8 *p = (u8 *)qry;
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int x, y;
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unsigned char c;
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for (x = 0; x < sizeof(struct cfi_qry); x += 16) {
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debug("%02x : ", x);
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for (y = 0; y < 16; y++)
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debug("%2.2x ", p[x + y]);
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debug(" ");
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for (y = 0; y < 16; y++) {
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c = p[x + y];
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if (c >= 0x20 && c <= 0x7e)
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debug("%c", c);
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else
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debug(".");
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}
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debug("\n");
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}
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}
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#endif
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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 (struct flash_info *info, uint offset)
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{
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uchar *cp = flash_make_addr(info, 0, offset);
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#if defined __LITTLE_ENDIAN
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return flash_read8(cp);
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#else
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return flash_read8(cp + info->portwidth - 1);
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#endif
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}
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/*
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* read a long word by picking the least significant byte of each maximum
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* port size word. Swap for ppc format.
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*/
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static ulong flash_read_long (struct flash_info *info, flash_sect_t sect, uint offset)
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{
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uchar *addr;
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ulong retval;
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#ifdef DEBUG
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int x;
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#endif
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addr = flash_make_addr (info, sect, offset);
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#ifdef DEBUG
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debug ("long addr is at %p info->portwidth = %d\n", addr,
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info->portwidth);
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for (x = 0; x < 4 * info->portwidth; x++) {
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debug ("addr[%x] = 0x%x\n", x, flash_read8(addr + x));
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}
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#endif
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#if defined __LITTLE_ENDIAN
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retval = ((flash_read8(addr) << 16) |
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(flash_read8(addr + info->portwidth) << 24) |
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(flash_read8(addr + 2 * info->portwidth)) |
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(flash_read8(addr + 3 * info->portwidth) << 8));
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#else
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retval = ((flash_read8(addr + 2 * info->portwidth - 1) << 24) |
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(flash_read8(addr + info->portwidth - 1) << 16) |
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(flash_read8(addr + 4 * info->portwidth - 1) << 8) |
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(flash_read8(addr + 3 * info->portwidth - 1)));
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#endif
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return retval;
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}
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/*
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* detect if flash is compatible with the Common Flash Interface (CFI)
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* http://www.jedec.org/download/search/jesd68.pdf
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*
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*/
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u32 jedec_read_mfr(struct flash_info *info)
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{
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int bank = 0;
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uchar mfr;
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/* According to JEDEC "Standard Manufacturer's Identification Code"
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* (http://www.jedec.org/download/search/jep106W.pdf)
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* several first banks can contain 0x7f instead of actual ID
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*/
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do {
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mfr = flash_read_uchar (info,
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(bank << 8) | FLASH_OFFSET_MANUFACTURER_ID);
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bank++;
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} while (mfr == FLASH_ID_CONTINUATION);
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return mfr;
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}
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static void flash_read_cfi (struct flash_info *info, void *buf,
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unsigned int start, size_t len)
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{
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u8 *p = buf;
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unsigned int i;
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for (i = 0; i < len; i++)
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p[i] = flash_read_uchar(info, start + i);
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}
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static int flash_detect_cfi (struct flash_info *info, struct cfi_qry *qry)
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{
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int cfi_offset;
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debug ("flash detect cfi\n");
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for (info->portwidth = CFG_FLASH_CFI_WIDTH;
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info->portwidth <= FLASH_CFI_64BIT; info->portwidth <<= 1) {
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for (info->chipwidth = FLASH_CFI_BY8;
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info->chipwidth <= info->portwidth;
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info->chipwidth <<= 1) {
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flash_write_cmd (info, 0, 0, AMD_CMD_RESET);
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flash_write_cmd (info, 0, 0, FLASH_CMD_RESET);
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for (cfi_offset=0; cfi_offset < sizeof(flash_offset_cfi)/sizeof(uint); cfi_offset++) {
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flash_write_cmd (info, 0, flash_offset_cfi[cfi_offset], FLASH_CMD_CFI);
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if (flash_isequal (info, 0, FLASH_OFFSET_CFI_RESP, 'Q')
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&& flash_isequal (info, 0, FLASH_OFFSET_CFI_RESP + 1, 'R')
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&& flash_isequal (info, 0, FLASH_OFFSET_CFI_RESP + 2, 'Y')) {
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flash_read_cfi(info, qry, FLASH_OFFSET_CFI_RESP,
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sizeof(struct cfi_qry));
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info->interface = le16_to_cpu(qry->interface_desc);
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info->cfi_offset=flash_offset_cfi[cfi_offset];
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debug ("device interface is %d\n",
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info->interface);
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debug ("found port %d chip %d ",
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info->portwidth, info->chipwidth);
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debug ("port %d bits chip %d bits\n",
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info->portwidth << CFI_FLASH_SHIFT_WIDTH,
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info->chipwidth << CFI_FLASH_SHIFT_WIDTH);
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return 1;
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}
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}
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}
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}
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debug ("not found\n");
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return 0;
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}
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/*
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* The following code cannot be run from FLASH!
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*/
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static ulong flash_get_size (struct flash_info *info)
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{
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int i, j;
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flash_sect_t sect_cnt;
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unsigned long sector;
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unsigned long tmp;
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int size_ratio;
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uchar num_erase_regions;
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int erase_region_size;
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int erase_region_count;
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int cur_offset = 0;
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struct cfi_qry qry;
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unsigned long base = (unsigned long)info->base;
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memset(&qry, 0, sizeof(qry));
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info->ext_addr = 0;
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info->cfi_version = 0;
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#ifdef CFG_FLASH_PROTECTION
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info->legacy_unlock = 0;
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#endif
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/* first only malloc space for the first sector */
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info->start = xmalloc(sizeof(ulong));
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info->start[0] = base;
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info->protect = 0;
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if (flash_detect_cfi (info, &qry)) {
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info->vendor = le16_to_cpu(qry.p_id);
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info->ext_addr = le16_to_cpu(qry.p_adr);
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num_erase_regions = qry.num_erase_regions;
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if (info->ext_addr) {
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info->cfi_version = (ushort) flash_read_uchar (info,
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info->ext_addr + 3) << 8;
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info->cfi_version |= (ushort) flash_read_uchar (info,
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info->ext_addr + 4);
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}
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#ifdef DEBUG
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flash_printqry (&qry);
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#endif
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switch (info->vendor) {
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#ifdef CONFIG_DRIVER_CFI_INTEL
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case CFI_CMDSET_INTEL_EXTENDED:
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case CFI_CMDSET_INTEL_STANDARD:
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info->cfi_cmd_set = &cfi_cmd_set_intel;
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break;
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#endif
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#ifdef CONFIG_DRIVER_CFI_AMD
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case CFI_CMDSET_AMD_STANDARD:
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case CFI_CMDSET_AMD_EXTENDED:
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info->cfi_cmd_set = &cfi_cmd_set_amd;
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break;
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#endif
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default:
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printf("unsupported vendor\n");
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return 0;
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}
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info->cfi_cmd_set->flash_read_jedec_ids (info);
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flash_write_cmd (info, 0, info->cfi_offset, FLASH_CMD_CFI);
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info->cfi_cmd_set->flash_fixup (info, &qry);
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debug ("manufacturer is %d\n", info->vendor);
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debug ("manufacturer id is 0x%x\n", info->manufacturer_id);
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debug ("device id is 0x%x\n", info->device_id);
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debug ("device id2 is 0x%x\n", info->device_id2);
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debug ("cfi version is 0x%04x\n", info->cfi_version);
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|
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size_ratio = info->portwidth / info->chipwidth;
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/* if the chip is x8/x16 reduce the ratio by half */
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if ((info->interface == FLASH_CFI_X8X16)
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&& (info->chipwidth == FLASH_CFI_BY8)) {
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size_ratio >>= 1;
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}
|
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debug ("size_ratio %d port %d bits chip %d bits\n",
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size_ratio, info->portwidth << CFI_FLASH_SHIFT_WIDTH,
|
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info->chipwidth << CFI_FLASH_SHIFT_WIDTH);
|
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debug ("found %d erase regions\n", num_erase_regions);
|
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info->eraseregions = xzalloc(sizeof(*(info->eraseregions)) * num_erase_regions);
|
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info->numeraseregions = num_erase_regions;
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sect_cnt = 0;
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sector = base;
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|
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for (i = 0; i < num_erase_regions; i++) {
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struct mtd_erase_region_info *region = &info->eraseregions[i];
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|
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if (i > NUM_ERASE_REGIONS) {
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printf ("%d erase regions found, only %d used\n",
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num_erase_regions, NUM_ERASE_REGIONS);
|
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break;
|
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}
|
|
|
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tmp = le32_to_cpu(qry.erase_region_info[i]);
|
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debug("erase region %u: 0x%08lx\n", i, tmp);
|
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|
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erase_region_count = (tmp & 0xffff) + 1;
|
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tmp >>= 16;
|
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erase_region_size =
|
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(tmp & 0xffff) ? ((tmp & 0xffff) * 256) : 128;
|
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debug ("erase_region_count = %d erase_region_size = %d\n",
|
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erase_region_count, erase_region_size);
|
|
|
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region->offset = cur_offset;
|
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region->erasesize = erase_region_size;
|
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region->numblocks = erase_region_count;
|
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cur_offset += erase_region_size * erase_region_count;
|
|
|
|
/* increase the space malloced for the sector start addresses */
|
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info->start = xrealloc(info->start, sizeof(ulong) * (erase_region_count + sect_cnt));
|
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info->protect = xrealloc(info->protect, sizeof(uchar) * (erase_region_count + sect_cnt));
|
|
|
|
for (j = 0; j < erase_region_count; j++) {
|
|
info->start[sect_cnt] = sector;
|
|
sector += (erase_region_size * size_ratio);
|
|
|
|
/*
|
|
* Only read protection status from supported devices (intel...)
|
|
*/
|
|
switch (info->vendor) {
|
|
case CFI_CMDSET_INTEL_EXTENDED:
|
|
case CFI_CMDSET_INTEL_STANDARD:
|
|
info->protect[sect_cnt] =
|
|
flash_isset (info, sect_cnt,
|
|
FLASH_OFFSET_PROTECT,
|
|
FLASH_STATUS_PROTECT);
|
|
break;
|
|
default:
|
|
info->protect[sect_cnt] = 0; /* default: not protected */
|
|
}
|
|
|
|
sect_cnt++;
|
|
}
|
|
}
|
|
|
|
info->sector_count = sect_cnt;
|
|
/* multiply the size by the number of chips */
|
|
info->size = (1 << qry.dev_size) * size_ratio;
|
|
info->buffer_size = (1 << le16_to_cpu(qry.max_buf_write_size));
|
|
info->erase_blk_tout = 1 << (qry.block_erase_timeout_typ +
|
|
qry.block_erase_timeout_max);
|
|
info->buffer_write_tout = 1 << (qry.buf_write_timeout_typ +
|
|
qry.buf_write_timeout_max);
|
|
info->write_tout = 1 << (qry.word_write_timeout_typ +
|
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qry.word_write_timeout_max);
|
|
info->flash_id = FLASH_MAN_CFI;
|
|
if ((info->interface == FLASH_CFI_X8X16) && (info->chipwidth == FLASH_CFI_BY8)) {
|
|
info->portwidth >>= 1; /* XXX - Need to test on x8/x16 in parallel. */
|
|
}
|
|
flash_write_cmd (info, 0, 0, info->cmd_reset);
|
|
}
|
|
|
|
return info->size;
|
|
}
|
|
|
|
/* loop through the sectors from the highest address
|
|
* when the passed address is greater or equal to the sector address
|
|
* we have a match
|
|
*/
|
|
flash_sect_t find_sector (struct flash_info *info, ulong addr)
|
|
{
|
|
flash_sect_t sector;
|
|
|
|
for (sector = info->sector_count - 1; sector >= 0; sector--) {
|
|
if (addr >= info->start[sector])
|
|
break;
|
|
}
|
|
return sector;
|
|
}
|
|
|
|
static int __cfi_erase(struct cdev *cdev, size_t count, loff_t offset,
|
|
int verbose)
|
|
{
|
|
struct flash_info *finfo = (struct flash_info *)cdev->priv;
|
|
unsigned long start, end;
|
|
int i, ret = 0;
|
|
|
|
debug("%s: erase 0x%08lx (size %d)\n", __func__, offset, count);
|
|
|
|
start = find_sector(finfo, (unsigned long)finfo->base + offset);
|
|
end = find_sector(finfo, (unsigned long)finfo->base + offset +
|
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count - 1);
|
|
|
|
if (verbose)
|
|
init_progression_bar(end - start);
|
|
|
|
for (i = start; i <= end; i++) {
|
|
ret = finfo->cfi_cmd_set->flash_erase_one(finfo, i);
|
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if (ret)
|
|
goto out;
|
|
|
|
if (ctrlc()) {
|
|
ret = -EINTR;
|
|
goto out;
|
|
}
|
|
|
|
if (verbose)
|
|
show_progress(i - start);
|
|
}
|
|
out:
|
|
if (verbose)
|
|
putchar('\n');
|
|
return ret;
|
|
}
|
|
|
|
static int cfi_erase(struct cdev *cdev, size_t count, loff_t offset)
|
|
{
|
|
return __cfi_erase(cdev, count, offset, 1);
|
|
}
|
|
|
|
/*
|
|
* Copy memory to flash, returns:
|
|
* 0 - OK
|
|
* 1 - write timeout
|
|
* 2 - Flash not erased
|
|
*/
|
|
static int write_buff (struct flash_info *info, const uchar * src, ulong addr, ulong cnt)
|
|
{
|
|
ulong wp;
|
|
uchar *p;
|
|
int aln;
|
|
cfiword_t cword;
|
|
int i, rc;
|
|
|
|
#ifdef CONFIG_CFI_BUFFER_WRITE
|
|
int buffered_size;
|
|
#endif
|
|
/* get lower aligned address */
|
|
wp = (addr & ~(info->portwidth - 1));
|
|
|
|
/* handle unaligned start */
|
|
if ((aln = addr - wp) != 0) {
|
|
cword = 0;
|
|
p = (uchar*)wp;
|
|
for (i = 0; i < aln; ++i)
|
|
flash_add_byte (info, &cword, flash_read8(p + i));
|
|
|
|
for (; (i < info->portwidth) && (cnt > 0); i++) {
|
|
flash_add_byte (info, &cword, *src++);
|
|
cnt--;
|
|
}
|
|
for (; (cnt == 0) && (i < info->portwidth); ++i)
|
|
flash_add_byte (info, &cword, flash_read8(p + i));
|
|
|
|
rc = flash_write_cfiword (info, wp, cword);
|
|
if (rc != 0)
|
|
return rc;
|
|
|
|
wp += i;
|
|
}
|
|
|
|
/* handle the aligned part */
|
|
#ifdef CONFIG_CFI_BUFFER_WRITE
|
|
buffered_size = (info->portwidth / info->chipwidth);
|
|
buffered_size *= info->buffer_size;
|
|
while (cnt >= info->portwidth) {
|
|
/* prohibit buffer write when buffer_size is 1 */
|
|
if (info->buffer_size == 1) {
|
|
cword = 0;
|
|
for (i = 0; i < info->portwidth; i++)
|
|
flash_add_byte (info, &cword, *src++);
|
|
if ((rc = flash_write_cfiword (info, wp, cword)) != 0)
|
|
return rc;
|
|
wp += info->portwidth;
|
|
cnt -= info->portwidth;
|
|
continue;
|
|
}
|
|
|
|
/* write buffer until next buffered_size aligned boundary */
|
|
i = buffered_size - (wp % buffered_size);
|
|
if (i > cnt)
|
|
i = cnt;
|
|
if ((rc = info->cfi_cmd_set->flash_write_cfibuffer (info, wp, src, i)) != ERR_OK)
|
|
return rc;
|
|
i -= i & (info->portwidth - 1);
|
|
wp += i;
|
|
src += i;
|
|
cnt -= i;
|
|
}
|
|
#else
|
|
while (cnt >= info->portwidth) {
|
|
cword = 0;
|
|
for (i = 0; i < info->portwidth; i++) {
|
|
flash_add_byte (info, &cword, *src++);
|
|
}
|
|
if ((rc = flash_write_cfiword (info, wp, cword)) != 0)
|
|
return rc;
|
|
wp += info->portwidth;
|
|
cnt -= info->portwidth;
|
|
}
|
|
#endif /* CONFIG_CFI_BUFFER_WRITE */
|
|
if (cnt == 0) {
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* handle unaligned tail bytes
|
|
*/
|
|
cword = 0;
|
|
p = (uchar*)wp;
|
|
for (i = 0; (i < info->portwidth) && (cnt > 0); ++i) {
|
|
flash_add_byte (info, &cword, *src++);
|
|
--cnt;
|
|
}
|
|
for (; i < info->portwidth; ++i) {
|
|
flash_add_byte (info, &cword, flash_read8(p + i));
|
|
}
|
|
|
|
return flash_write_cfiword (info, wp, cword);
|
|
}
|
|
|
|
static int flash_real_protect (struct flash_info *info, long sector, int prot)
|
|
{
|
|
int retcode = 0;
|
|
|
|
retcode = info->cfi_cmd_set->flash_real_protect(info, sector, prot);
|
|
|
|
if (retcode)
|
|
return retcode;
|
|
|
|
if ((retcode =
|
|
flash_status_check (info, sector, info->erase_blk_tout,
|
|
prot ? "protect" : "unprotect")) == 0) {
|
|
|
|
info->protect[sector] = prot;
|
|
|
|
/*
|
|
* On some of Intel's flash chips (marked via legacy_unlock)
|
|
* unprotect unprotects all locking.
|
|
*/
|
|
if ((prot == 0) && (info->legacy_unlock)) {
|
|
flash_sect_t i;
|
|
|
|
for (i = 0; i < info->sector_count; i++) {
|
|
if (info->protect[i])
|
|
flash_real_protect (info, i, 1);
|
|
}
|
|
}
|
|
}
|
|
return retcode;
|
|
}
|
|
|
|
static int cfi_protect(struct cdev *cdev, size_t count, loff_t offset, int prot)
|
|
{
|
|
struct flash_info *finfo = (struct flash_info *)cdev->priv;
|
|
unsigned long start, end;
|
|
int i, ret = 0;
|
|
const char *action = (prot? "protect" : "unprotect");
|
|
|
|
printf("%s: %s 0x%p (size %d)\n", __func__,
|
|
action, finfo->base + offset, count);
|
|
|
|
start = find_sector(finfo, (unsigned long)finfo->base + offset);
|
|
end = find_sector(finfo, (unsigned long)finfo->base + offset + count - 1);
|
|
|
|
for (i = start; i <= end; i++) {
|
|
ret = flash_real_protect (finfo, i, prot);
|
|
if (ret)
|
|
goto out;
|
|
}
|
|
out:
|
|
putchar('\n');
|
|
return ret;
|
|
}
|
|
|
|
static ssize_t cfi_write(struct cdev *cdev, const void *buf, size_t count, loff_t offset, ulong flags)
|
|
{
|
|
struct flash_info *finfo = (struct flash_info *)cdev->priv;
|
|
int ret;
|
|
|
|
debug("cfi_write: buf=0x%p addr=0x%08lx count=0x%08x\n",buf, finfo->base + offset, count);
|
|
|
|
ret = write_buff(finfo, buf, (unsigned long)finfo->base + offset, count);
|
|
return ret == 0 ? count : -1;
|
|
}
|
|
|
|
static void cfi_info (struct device_d* dev)
|
|
{
|
|
struct flash_info *info = (struct flash_info *)dev->priv;
|
|
int i;
|
|
|
|
if (info->flash_id != FLASH_MAN_CFI) {
|
|
puts ("missing or unknown FLASH type\n");
|
|
return;
|
|
}
|
|
|
|
printf ("CFI conformant FLASH (%d x %d)",
|
|
(info->portwidth << 3), (info->chipwidth << 3));
|
|
printf (" Size: %ld MB in %d Sectors\n",
|
|
info->size >> 20, info->sector_count);
|
|
printf (" ");
|
|
switch (info->vendor) {
|
|
case CFI_CMDSET_INTEL_STANDARD:
|
|
printf ("Intel Standard");
|
|
break;
|
|
case CFI_CMDSET_INTEL_EXTENDED:
|
|
printf ("Intel Extended");
|
|
break;
|
|
case CFI_CMDSET_AMD_STANDARD:
|
|
printf ("AMD Standard");
|
|
break;
|
|
case CFI_CMDSET_AMD_EXTENDED:
|
|
printf ("AMD Extended");
|
|
break;
|
|
default:
|
|
printf ("Unknown (%d)", info->vendor);
|
|
break;
|
|
}
|
|
printf (" command set, Manufacturer ID: 0x%02X, Device ID: 0x%02X",
|
|
info->manufacturer_id, info->device_id);
|
|
if (info->device_id == 0x7E) {
|
|
printf("%04X", info->device_id2);
|
|
}
|
|
printf ("\n Erase timeout: %ld ms, write timeout: %ld us\n",
|
|
info->erase_blk_tout,
|
|
info->write_tout);
|
|
if (info->buffer_size > 1) {
|
|
printf (" Buffer write timeout: %ld us, buffer size: %d bytes\n",
|
|
info->buffer_write_tout,
|
|
info->buffer_size);
|
|
}
|
|
|
|
puts ("\n Sector Start Addresses:");
|
|
for (i = 0; i < info->sector_count; ++i) {
|
|
if ((i % 5) == 0)
|
|
printf ("\n");
|
|
#ifdef CFG_FLASH_EMPTY_INFO
|
|
{
|
|
int k;
|
|
int size;
|
|
int erased;
|
|
volatile unsigned long *flash;
|
|
|
|
/*
|
|
* Check if whole sector is erased
|
|
*/
|
|
if (i != (info->sector_count - 1))
|
|
size = info->start[i + 1] - info->start[i];
|
|
else
|
|
size = info->start[0] + info->size - info->start[i];
|
|
erased = 1;
|
|
flash = (volatile unsigned long *) info->start[i];
|
|
size = size >> 2; /* divide by 4 for longword access */
|
|
for (k = 0; k < size; k++) {
|
|
if (*flash++ != 0xffffffff) {
|
|
erased = 0;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* print empty and read-only info */
|
|
printf (" %08lX %c %s ",
|
|
info->start[i],
|
|
erased ? 'E' : ' ',
|
|
info->protect[i] ? "RO" : " ");
|
|
}
|
|
#else /* ! CFG_FLASH_EMPTY_INFO */
|
|
printf (" %08lX %s ",
|
|
info->start[i],
|
|
info->protect[i] ? "RO" : " ");
|
|
#endif
|
|
}
|
|
putchar('\n');
|
|
return;
|
|
}
|
|
|
|
#if 0
|
|
/*
|
|
* flash_read_user_serial - read the OneTimeProgramming cells
|
|
*/
|
|
static void flash_read_user_serial (struct flash_info *info, void *buffer, int offset,
|
|
int len)
|
|
{
|
|
uchar *src;
|
|
uchar *dst;
|
|
|
|
dst = buffer;
|
|
src = flash_make_addr (info, 0, FLASH_OFFSET_USER_PROTECTION);
|
|
flash_write_cmd (info, 0, 0, FLASH_CMD_READ_ID);
|
|
memcpy (dst, src + offset, len);
|
|
flash_write_cmd (info, 0, 0, info->cmd_reset);
|
|
}
|
|
|
|
/*
|
|
* flash_read_factory_serial - read the device Id from the protection area
|
|
*/
|
|
static void flash_read_factory_serial (struct flash_info *info, void *buffer, int offset,
|
|
int len)
|
|
{
|
|
uchar *src;
|
|
|
|
src = flash_make_addr (info, 0, FLASH_OFFSET_INTEL_PROTECTION);
|
|
flash_write_cmd (info, 0, 0, FLASH_CMD_READ_ID);
|
|
memcpy (buffer, src + offset, len);
|
|
flash_write_cmd (info, 0, 0, info->cmd_reset);
|
|
}
|
|
|
|
#endif
|
|
|
|
int flash_status_check (struct flash_info *info, flash_sect_t sector,
|
|
uint64_t tout, char *prompt)
|
|
{
|
|
return info->cfi_cmd_set->flash_status_check(info, sector, tout, prompt);
|
|
}
|
|
|
|
/*
|
|
* wait for XSR.7 to be set. Time out with an error if it does not.
|
|
* This routine does not set the flash to read-array mode.
|
|
*/
|
|
int flash_generic_status_check (struct flash_info *info, flash_sect_t sector,
|
|
uint64_t tout, char *prompt)
|
|
{
|
|
uint64_t start;
|
|
|
|
tout *= 1000000;
|
|
|
|
/* Wait for command completion */
|
|
start = get_time_ns();
|
|
while (info->cfi_cmd_set->flash_is_busy (info, sector)) {
|
|
if (is_timeout(start, tout)) {
|
|
printf ("Flash %s timeout at address %lx data %lx\n",
|
|
prompt, info->start[sector],
|
|
flash_read_long (info, sector, 0));
|
|
flash_write_cmd (info, sector, 0, info->cmd_reset);
|
|
return ERR_TIMOUT;
|
|
}
|
|
udelay (1); /* also triggers watchdog */
|
|
}
|
|
return ERR_OK;
|
|
}
|
|
|
|
/*
|
|
* make a proper sized command based on the port and chip widths
|
|
*/
|
|
void flash_make_cmd(struct flash_info *info, u32 cmd, cfiword_t *cmdbuf)
|
|
{
|
|
cfiword_t result = 0;
|
|
int i = info->portwidth / info->chipwidth;
|
|
|
|
while (i--)
|
|
result = (result << (8 * info->chipwidth)) | cmd;
|
|
*cmdbuf = result;
|
|
}
|
|
|
|
/*
|
|
* Write a proper sized command to the correct address
|
|
*/
|
|
void flash_write_cmd(struct flash_info *info, flash_sect_t sect,
|
|
uint offset, u32 cmd)
|
|
{
|
|
|
|
uchar *addr;
|
|
cfiword_t cword;
|
|
|
|
addr = flash_make_addr (info, sect, offset);
|
|
flash_make_cmd (info, cmd, &cword);
|
|
debug("%s: %p %lX %X => %p %llX\n", __FUNCTION__, info, sect, offset, addr, cword);
|
|
flash_write_word(info, cword, addr);
|
|
}
|
|
|
|
int flash_isequal(struct flash_info *info, flash_sect_t sect,
|
|
uint offset, u32 cmd)
|
|
{
|
|
void *addr;
|
|
cfiword_t cword;
|
|
int retval;
|
|
|
|
addr = flash_make_addr (info, sect, offset);
|
|
flash_make_cmd (info, cmd, &cword);
|
|
|
|
debug ("is= cmd %x(%c) addr %p ", cmd, cmd, addr);
|
|
if (bankwidth_is_1(info)) {
|
|
debug ("is= %x %x\n", flash_read8(addr), (u8)cword);
|
|
retval = (flash_read8(addr) == cword);
|
|
} else if (bankwidth_is_2(info)) {
|
|
debug ("is= %4.4x %4.4x\n", flash_read16(addr), (u16)cword);
|
|
retval = (flash_read16(addr) == cword);
|
|
} else if (bankwidth_is_4(info)) {
|
|
debug ("is= %8.8lx %8.8lx\n", flash_read32(addr), (u32)cword);
|
|
retval = (flash_read32(addr) == cword);
|
|
} else if (bankwidth_is_8(info)) {
|
|
#ifdef DEBUG
|
|
{
|
|
char str1[20];
|
|
char str2[20];
|
|
|
|
print_longlong (str1, flash_read32(addr));
|
|
print_longlong (str2, cword);
|
|
debug ("is= %s %s\n", str1, str2);
|
|
}
|
|
#endif
|
|
retval = (flash_read64(addr) == cword);
|
|
} else
|
|
retval = 0;
|
|
|
|
return retval;
|
|
}
|
|
|
|
int flash_isset(struct flash_info *info, flash_sect_t sect,
|
|
uint offset, u32 cmd)
|
|
{
|
|
void *addr = flash_make_addr (info, sect, offset);
|
|
cfiword_t cword;
|
|
int retval;
|
|
|
|
flash_make_cmd (info, cmd, &cword);
|
|
if (bankwidth_is_1(info)) {
|
|
retval = ((flash_read8(addr) & cword) == cword);
|
|
} else if (bankwidth_is_2(info)) {
|
|
retval = ((flash_read16(addr) & cword) == cword);
|
|
} else if (bankwidth_is_4(info)) {
|
|
retval = ((flash_read32(addr) & cword) == cword);
|
|
} else if (bankwidth_is_8(info)) {
|
|
retval = ((flash_read64(addr) & cword) == cword);
|
|
} else
|
|
retval = 0;
|
|
|
|
return retval;
|
|
}
|
|
|
|
struct file_operations cfi_ops = {
|
|
.read = mem_read,
|
|
.write = cfi_write,
|
|
.lseek = dev_lseek_default,
|
|
.erase = cfi_erase,
|
|
.protect = cfi_protect,
|
|
.memmap = generic_memmap_ro,
|
|
};
|
|
|
|
static int cfi_mtd_read(struct mtd_info *mtd, loff_t from, size_t len,
|
|
size_t *retlen, u_char *buf)
|
|
{
|
|
struct flash_info *info = container_of(mtd, struct flash_info, mtd);
|
|
|
|
memcpy(buf, info->base + from, len);
|
|
*retlen = len;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int cfi_mtd_write(struct mtd_info *mtd, loff_t to, size_t len,
|
|
size_t *retlen, const u_char *buf)
|
|
{
|
|
struct flash_info *info = container_of(mtd, struct flash_info, mtd);
|
|
int ret;
|
|
|
|
ret = write_buff(info, buf, (unsigned long)info->base + to, len);
|
|
*retlen = len;
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int cfi_mtd_erase(struct mtd_info *mtd, struct erase_info *instr)
|
|
{
|
|
struct flash_info *info = container_of(mtd, struct flash_info, mtd);
|
|
struct cdev *cdev = &info->cdev;
|
|
int ret;
|
|
|
|
ret = __cfi_erase(cdev, instr->len, instr->addr, 0);
|
|
|
|
if (ret) {
|
|
instr->state = MTD_ERASE_FAILED;
|
|
return -EIO;
|
|
}
|
|
|
|
instr->state = MTD_ERASE_DONE;
|
|
mtd_erase_callback(instr);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void cfi_init_mtd(struct flash_info *info)
|
|
{
|
|
struct mtd_info *mtd = &info->mtd;
|
|
|
|
mtd->read = cfi_mtd_read;
|
|
mtd->write = cfi_mtd_write;
|
|
mtd->erase = cfi_mtd_erase;
|
|
mtd->size = info->size;
|
|
mtd->name = info->cdev.name;
|
|
mtd->erasesize = info->eraseregions[1].erasesize; /* FIXME */
|
|
mtd->writesize = 1;
|
|
mtd->subpage_sft = 0;
|
|
mtd->eraseregions = info->eraseregions;
|
|
mtd->numeraseregions = info->numeraseregions;
|
|
mtd->flags = MTD_CAP_NORFLASH;
|
|
info->cdev.mtd = mtd;
|
|
}
|
|
|
|
static int cfi_probe (struct device_d *dev)
|
|
{
|
|
struct flash_info *info = xzalloc(sizeof(*info));
|
|
int cfinum;
|
|
|
|
dev->priv = (void *)info;
|
|
|
|
/* Init: no FLASHes known */
|
|
info->flash_id = FLASH_UNKNOWN;
|
|
info->cmd_reset = FLASH_CMD_RESET;
|
|
info->base = dev_request_mem_region(dev, 0);
|
|
info->size = flash_get_size(info);
|
|
|
|
if (info->flash_id == FLASH_UNKNOWN) {
|
|
printf ("## Unknown FLASH on Bank at 0x%08x - Size = 0x%08lx = %ld MB\n",
|
|
dev->resource[0].start, info->size, info->size << 20);
|
|
return -ENODEV;
|
|
}
|
|
|
|
dev_info(dev, "found cfi flash at %p, size %ld\n",
|
|
info->base, info->size);
|
|
|
|
if (dev->id < 0)
|
|
cfinum = cdev_find_free_index("nor");
|
|
else
|
|
cfinum = dev->id;
|
|
|
|
info->cdev.name = asprintf("nor%d", cfinum);
|
|
info->cdev.size = info->size;
|
|
info->cdev.dev = dev;
|
|
info->cdev.ops = &cfi_ops;
|
|
info->cdev.priv = info;
|
|
|
|
if (IS_ENABLED(CONFIG_PARTITION_NEED_MTD))
|
|
cfi_init_mtd(info);
|
|
|
|
devfs_create(&info->cdev);
|
|
|
|
if (dev->device_node)
|
|
of_parse_partitions(info->cdev.name, dev->device_node);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static __maybe_unused struct of_device_id cfi_dt_ids[] = {
|
|
{
|
|
.compatible = "cfi-flash",
|
|
}, {
|
|
/* sentinel */
|
|
}
|
|
};
|
|
|
|
static struct driver_d cfi_driver = {
|
|
.name = "cfi_flash",
|
|
.probe = cfi_probe,
|
|
.info = cfi_info,
|
|
.of_compatible = DRV_OF_COMPAT(cfi_dt_ids),
|
|
};
|
|
|
|
static int cfi_init(void)
|
|
{
|
|
return platform_driver_register(&cfi_driver);
|
|
}
|
|
|
|
device_initcall(cfi_init);
|