794 lines
22 KiB
C
794 lines
22 KiB
C
/*
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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[CONFIG_SYS_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, uchar cmd);
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static int flash_isequal(flash_info_t * info, int sect, uchar offset, uchar cmd);
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static int flash_isset(flash_info_t * info, int sect, uchar offset, 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, cfiword_t cword);
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static int flash_full_status_check(flash_info_t * info, ulong sector, ulong tout, char * prompt);
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#ifdef CONFIG_SYS_FLASH_USE_BUFFER_WRITE
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static int flash_write_cfibuffer(flash_info_t * info, ulong dest, uchar * cp, 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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inline 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->portwidth)));
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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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inline uchar flash_read_uchar(flash_info_t * info, uchar offset)
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{
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uchar *cp;
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cp = flash_make_addr(info, 0, offset);
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return (cp[info->portwidth - 1]);
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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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uchar * addr;
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addr = flash_make_addr(info, sect, offset);
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return ((addr[(2*info->portwidth) - 1] << 8) | addr[info->portwidth - 1]);
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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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uchar * addr;
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addr = flash_make_addr(info, sect, offset);
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return ( (addr[(2*info->portwidth) - 1] << 24 ) | (addr[(info->portwidth) -1] << 16) |
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(addr[(4*info->portwidth) - 1] << 8) | addr[(3*info->portwidth) - 1]);
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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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int i;
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unsigned long address;
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/* The flash is positioned back to back, with the demultiplexing of the chip
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* based on the A24 address line.
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*
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*/
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address = CONFIG_SYS_FLASH_BASE;
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size = 0;
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/* Init: no FLASHes known */
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for (i=0; i<CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
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flash_info[i].flash_id = FLASH_UNKNOWN;
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size += flash_info[i].size = flash_get_size(address, i);
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address += CONFIG_SYS_FLASH_INCREMENT;
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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",i,
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flash_info[0].size, flash_info[i].size<<20);
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}
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}
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#if 0 /* test-only */
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/* Monitor protection ON by default */
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#if (CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE)
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for(i=0; flash_info[0].start[i] < CONFIG_SYS_MONITOR_BASE+CONFIG_SYS_MONITOR_LEN-1; i++)
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(void)flash_real_protect(&flash_info[0], i, 1);
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#endif
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#else
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/* monitor protection ON by default */
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flash_protect (FLAG_PROTECT_SET,
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- CONFIG_SYS_MONITOR_LEN,
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- 1, &flash_info[1]);
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#endif
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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",
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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, FLASH_CMD_CLEAR_STATUS);
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flash_write_cmd(info, sect, 0, FLASH_CMD_BLOCK_ERASE);
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flash_write_cmd(info, sect, 0, FLASH_CMD_ERASE_CONFIRM);
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if(flash_full_status_check(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 (%d x %d)",
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(info->portwidth << 3 ), (info->chipwidth << 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",
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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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#ifdef CONFIG_SYS_FLASH_EMPTY_INFO
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int k;
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int size;
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int erased;
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volatile unsigned long *flash;
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/*
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* Check if whole sector is erased
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*/
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if (i != (info->sector_count-1))
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size = info->start[i+1] - info->start[i];
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else
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size = info->start[0] + info->size - info->start[i];
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erased = 1;
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flash = (volatile unsigned long *)info->start[i];
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size = size >> 2; /* divide by 4 for longword access */
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for (k=0; k<size; k++)
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{
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if (*flash++ != 0xffffffff)
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{
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erased = 0;
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break;
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}
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}
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if ((i % 5) == 0)
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printf ("\n ");
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/* print empty and read-only info */
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printf (" %08lX%s%s",
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info->start[i],
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erased ? " E" : " ",
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info->protect[i] ? "RO " : " ");
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#else
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if ((i % 5) == 0)
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printf ("\n ");
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printf (" %08lX%s",
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info->start[i],
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info->protect[i] ? " (RO)" : " ");
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#endif
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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 CONFIG_SYS_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 /* CONFIG_SYS_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 = 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, 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, info->start[sector]);
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flash_write_cmd(info, sector, 0, FLASH_CMD_RESET);
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return ERR_TIMOUT;
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}
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}
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return ERR_OK;
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}
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/*-----------------------------------------------------------------------
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* Wait for XSR.7 to be set, if it times out print an error, otherwise do a full status check.
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* This routine sets the flash to read-array mode.
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*/
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static int flash_full_status_check(flash_info_t * info, ulong sector, ulong tout, char * prompt)
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{
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int retcode;
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retcode = flash_status_check(info, sector, tout, prompt);
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if((retcode == ERR_OK) && !flash_isequal(info,sector, 0, FLASH_STATUS_DONE)) {
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retcode = ERR_INVAL;
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printf("Flash %s error at address %lx\n", prompt,info->start[sector]);
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if(flash_isset(info, sector, 0, FLASH_STATUS_ECLBS | FLASH_STATUS_PSLBS)){
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printf("Command Sequence Error.\n");
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} else if(flash_isset(info, sector, 0, FLASH_STATUS_ECLBS)){
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printf("Block Erase Error.\n");
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retcode = ERR_NOT_ERASED;
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} else if (flash_isset(info, sector, 0, FLASH_STATUS_PSLBS)) {
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printf("Locking Error\n");
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}
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if(flash_isset(info, sector, 0, FLASH_STATUS_DPS)){
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printf("Block locked.\n");
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retcode = ERR_PROTECTED;
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}
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if(flash_isset(info, sector, 0, FLASH_STATUS_VPENS))
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printf("Vpp Low Error.\n");
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}
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flash_write_cmd(info, sector, 0, FLASH_CMD_RESET);
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return retcode;
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}
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/*-----------------------------------------------------------------------
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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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{
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switch(info->portwidth) {
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case FLASH_CFI_8BIT:
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cword->c = c;
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break;
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case FLASH_CFI_16BIT:
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cword->w = (cword->w << 8) | c;
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break;
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case FLASH_CFI_32BIT:
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cword->l = (cword->l << 8) | c;
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}
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}
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/*-----------------------------------------------------------------------
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* 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;
|
|
}
|
|
|
|
/*
|
|
* 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)
|
|
{
|
|
|
|
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;
|
|
}
|
|
}
|
|
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 = 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_size = (tmp & 0xffff)? ((tmp & 0xffff) * 256): 128;
|
|
tmp >>= 16;
|
|
erase_region_count = (tmp & 0xffff) +1;
|
|
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 CONFIG_SYS_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;
|
|
if (len & 0x1) { /* test-only: unaligned size */
|
|
puts("\nUnalgined size!!!\n"); /* test-only */
|
|
cnt++;
|
|
}
|
|
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 /* CONFIG_SYS_USE_FLASH_BUFFER_WRITE */
|