diff options
Diffstat (limited to 'board/amirix/ap1000/flash.c')
| -rw-r--r-- | board/amirix/ap1000/flash.c | 900 |
1 files changed, 0 insertions, 900 deletions
diff --git a/board/amirix/ap1000/flash.c b/board/amirix/ap1000/flash.c deleted file mode 100644 index bf8877ec6a..0000000000 --- a/board/amirix/ap1000/flash.c +++ /dev/null @@ -1,900 +0,0 @@ -/** - * @file flash.c - */ - -/* - * (C) Copyright 2003 - * AMIRIX Systems Inc. - * - * Originated from ppcboot-2.0.0/board/esd/cpci440/strataflash.c - * - * (C) Copyright 2002 - * Brad Kemp, Seranoa Networks, Brad.Kemp@seranoa.com - * - * See file CREDITS for list of people who contributed to this - * project. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License as - * published by the Free Software Foundation; either version 2 of - * the License, or (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, - * MA 02111-1307 USA - */ - -#include <common.h> -#include <asm/processor.h> - -#undef DEBUG_FLASH -/* - * This file implements a Common Flash Interface (CFI) driver for ppcboot. - * The width of the port and the width of the chips are determined at initialization. - * These widths are used to calculate the address for access CFI data structures. - * It has been tested on an Intel Strataflash implementation. - * - * References - * JEDEC Standard JESD68 - Common Flash Interface (CFI) - * JEDEC Standard JEP137-A Common Flash Interface (CFI) ID Codes - * Intel Application Note 646 Common Flash Interface (CFI) and Command Sets - * Intel 290667-008 3 Volt Intel StrataFlash Memory datasheet - * - * TODO - * Use Primary Extended Query table (PRI) and Alternate Algorithm Query Table (ALT) to determine if protection is available - * Add support for other command sets Use the PRI and ALT to determine command set - * Verify erase and program timeouts. - */ - -#define FLASH_CMD_CFI 0x98 -#define FLASH_CMD_READ_ID 0x90 -#define FLASH_CMD_RESET 0xff -#define FLASH_CMD_BLOCK_ERASE 0x20 -#define FLASH_CMD_ERASE_CONFIRM 0xD0 -#define FLASH_CMD_WRITE 0x40 -#define FLASH_CMD_PROTECT 0x60 -#define FLASH_CMD_PROTECT_SET 0x01 -#define FLASH_CMD_PROTECT_CLEAR 0xD0 -#define FLASH_CMD_CLEAR_STATUS 0x50 -#define FLASH_CMD_WRITE_TO_BUFFER 0xE8 -#define FLASH_CMD_WRITE_BUFFER_CONFIRM 0xD0 - -#define FLASH_STATUS_DONE 0x80 -#define FLASH_STATUS_ESS 0x40 -#define FLASH_STATUS_ECLBS 0x20 -#define FLASH_STATUS_PSLBS 0x10 -#define FLASH_STATUS_VPENS 0x08 -#define FLASH_STATUS_PSS 0x04 -#define FLASH_STATUS_DPS 0x02 -#define FLASH_STATUS_R 0x01 -#define FLASH_STATUS_PROTECT 0x01 - -#define FLASH_OFFSET_CFI 0x55 -#define FLASH_OFFSET_CFI_RESP 0x10 -#define FLASH_OFFSET_WTOUT 0x1F -#define FLASH_OFFSET_WBTOUT 0x20 -#define FLASH_OFFSET_ETOUT 0x21 -#define FLASH_OFFSET_CETOUT 0x22 -#define FLASH_OFFSET_WMAX_TOUT 0x23 -#define FLASH_OFFSET_WBMAX_TOUT 0x24 -#define FLASH_OFFSET_EMAX_TOUT 0x25 -#define FLASH_OFFSET_CEMAX_TOUT 0x26 -#define FLASH_OFFSET_SIZE 0x27 -#define FLASH_OFFSET_INTERFACE 0x28 -#define FLASH_OFFSET_BUFFER_SIZE 0x2A -#define FLASH_OFFSET_NUM_ERASE_REGIONS 0x2C -#define FLASH_OFFSET_ERASE_REGIONS 0x2D -#define FLASH_OFFSET_PROTECT 0x02 -#define FLASH_OFFSET_USER_PROTECTION 0x85 -#define FLASH_OFFSET_INTEL_PROTECTION 0x81 - -#define FLASH_MAN_CFI 0x01000000 - -typedef union { - unsigned char c; - unsigned short w; - unsigned long l; -} cfiword_t; - -typedef union { - unsigned char *cp; - unsigned short *wp; - unsigned long *lp; -} cfiptr_t; - -#define NUM_ERASE_REGIONS 4 - -flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */ - -/*----------------------------------------------------------------------- - * Functions - */ - -static void flash_add_byte (flash_info_t * info, cfiword_t * cword, uchar c); -static void flash_make_cmd (flash_info_t * info, uchar cmd, void *cmdbuf); -static void flash_write_cmd (flash_info_t * info, int sect, uchar offset, - uchar cmd); -static int flash_isequal (flash_info_t * info, int sect, uchar offset, - uchar cmd); -static int flash_isset (flash_info_t * info, int sect, uchar offset, - uchar cmd); -static int flash_detect_cfi (flash_info_t * info); -static ulong flash_get_size (ulong base, int banknum); -static int flash_write_cfiword (flash_info_t * info, ulong dest, - cfiword_t cword); -static int flash_full_status_check (flash_info_t * info, ulong sector, - ulong tout, char *prompt); -#ifdef CONFIG_SYS_FLASH_USE_BUFFER_WRITE -static int flash_write_cfibuffer (flash_info_t * info, ulong dest, uchar * cp, - int len); -#endif -/*----------------------------------------------------------------------- - * create an address based on the offset and the port width - */ -uchar *flash_make_addr (flash_info_t * info, int sect, int offset) -{ - return ((uchar *) (info->start[sect] + (offset * info->chipwidth))); -} - -/*----------------------------------------------------------------------- - * read a character at a port width address - */ -uchar flash_read_uchar (flash_info_t * info, uchar offset) -{ - if (info->portwidth == FLASH_CFI_8BIT) { - volatile uchar *cp; - uchar c; - - cp = flash_make_addr (info, 0, offset); - c = *cp; -#ifdef DEBUG_FLASH - printf ("flash_read_uchar offset=%04x ptr=%08x c=%02x\n", - offset, (unsigned int) cp, c); -#endif - return (c); - - } else if (info->portwidth == FLASH_CFI_16BIT) { - volatile ushort *sp; - ushort s; - uchar c; - - sp = (ushort *) flash_make_addr (info, 0, offset); - s = *sp; - c = (uchar) s; -#ifdef DEBUG_FLASH - printf ("flash_read_uchar offset=%04x ptr=%08x s=%04x c=%02x\n", offset, (unsigned int) sp, s, c); -#endif - return (c); - - } - - return 0; -} - -/*----------------------------------------------------------------------- - * read a short word by swapping for ppc format. - */ -ushort flash_read_ushort (flash_info_t * info, int sect, uchar offset) -{ - if (info->portwidth == FLASH_CFI_8BIT) { - volatile uchar *cp; - uchar c0, c1; - ushort s; - - cp = flash_make_addr (info, 0, offset); - c1 = cp[2]; - c0 = cp[0]; - s = c1 << 8 | c0; -#ifdef DEBUG_FLASH - printf ("flash_read_ushort offset=%04x ptr=%08x c1=%02x c0=%02x s=%04x\n", offset, (unsigned int) cp, c1, c0, s); -#endif - return (s); - - } else if (info->portwidth == FLASH_CFI_16BIT) { - volatile ushort *sp; - ushort s; - uchar c0, c1; - - sp = (ushort *) flash_make_addr (info, 0, offset); - s = *sp; - c1 = (uchar) sp[1]; - c0 = (uchar) sp[0]; - s = c1 << 8 | c0; -#ifdef DEBUG_FLASH - printf ("flash_read_ushort offset=%04x ptr=%08x c1=%02x c0=%02x s=%04x\n", offset, (unsigned int) sp, c1, c0, s); -#endif - return (s); - - } - - return 0; -} - -/*----------------------------------------------------------------------- - * read a long word by picking the least significant byte of each maiximum - * port size word. Swap for ppc format. - */ -ulong flash_read_long (flash_info_t * info, int sect, uchar offset) -{ - if (info->portwidth == FLASH_CFI_8BIT) { - volatile uchar *cp; - uchar c0, c1, c2, c3; - ulong l; - - cp = flash_make_addr (info, 0, offset); - c3 = cp[6]; - c2 = cp[4]; - c1 = cp[2]; - c0 = cp[0]; - l = c3 << 24 | c2 << 16 | c1 << 8 | c0; -#ifdef DEBUG_FLASH - printf ("flash_read_long offset=%04x ptr=%08x c3=%02x c2=%02x c1=%02x c0=%02x l=%08x\n", offset, (unsigned int) cp, c3, c2, c1, c0, l); -#endif - return (l); - - } else if (info->portwidth == FLASH_CFI_16BIT) { - volatile ushort *sp; - uchar c0, c1, c2, c3; - ulong l; - - sp = (ushort *) flash_make_addr (info, 0, offset); - c3 = (uchar) sp[3]; - c2 = (uchar) sp[2]; - c1 = (uchar) sp[1]; - c0 = (uchar) sp[0]; - l = c3 << 24 | c2 << 16 | c1 << 8 | c0; -#ifdef DEBUG_FLASH - printf ("flash_read_long offset=%04x ptr=%08x c3=%02x c2=%02x c1=%02x c0=%02x l=%08x\n", offset, (unsigned int) sp, c3, c2, c1, c0, l); -#endif - return (l); - - } - - return 0; -} - -/*----------------------------------------------------------------------- - */ -unsigned long flash_init (void) -{ - unsigned long size; - - size = 0; - - flash_info[0].flash_id = FLASH_UNKNOWN; - flash_info[0].portwidth = FLASH_CFI_16BIT; - flash_info[0].chipwidth = FLASH_CFI_16BIT; - size += flash_info[0].size = flash_get_size (CONFIG_SYS_PROGFLASH_BASE, 0); - if (flash_info[0].flash_id == FLASH_UNKNOWN) { - printf ("## Unknown FLASH on Bank %d - Size = 0x%08lx = %ld MB\n", 1, flash_info[0].size, flash_info[0].size << 20); - }; - - flash_info[1].flash_id = FLASH_UNKNOWN; - flash_info[1].portwidth = FLASH_CFI_8BIT; - flash_info[1].chipwidth = FLASH_CFI_16BIT; - size += flash_info[1].size = flash_get_size (CONFIG_SYS_CONFFLASH_BASE, 1); - if (flash_info[1].flash_id == FLASH_UNKNOWN) { - printf ("## Unknown FLASH on Bank %d - Size = 0x%08lx = %ld MB\n", 2, flash_info[1].size, flash_info[1].size << 20); - }; - - return (size); -} - -/*----------------------------------------------------------------------- - */ -int flash_erase (flash_info_t * info, int s_first, int s_last) -{ - int rcode = 0; - int prot; - int sect; - - if (info->flash_id != FLASH_MAN_CFI) { - printf ("Can't erase unknown flash type - aborted\n"); - return 1; - } - if ((s_first < 0) || (s_first > s_last)) { - printf ("- no sectors to erase\n"); - return 1; - } - - prot = 0; - for (sect = s_first; sect <= s_last; ++sect) { - if (info->protect[sect]) { - prot++; - } - } - if (prot) { - printf ("- Warning: %d protected sectors will not be erased!\n", prot); - } else { - printf ("\n"); - } - - for (sect = s_first; sect <= s_last; sect++) { - if (info->protect[sect] == 0) { /* not protected */ - flash_write_cmd (info, sect, 0, - FLASH_CMD_CLEAR_STATUS); - flash_write_cmd (info, sect, 0, - FLASH_CMD_BLOCK_ERASE); - flash_write_cmd (info, sect, 0, - FLASH_CMD_ERASE_CONFIRM); - - if (flash_full_status_check - (info, sect, info->erase_blk_tout, "erase")) { - rcode = 1; - } else - printf ("."); - } - } - printf (" done\n"); - return rcode; -} - -/*----------------------------------------------------------------------- - */ -void flash_print_info (flash_info_t * info) -{ - int i; - - if (info->flash_id != FLASH_MAN_CFI) { - printf ("missing or unknown FLASH type\n"); - return; - } - - printf ("CFI conformant FLASH (x%d device in x%d mode)", - (info->chipwidth << 3), (info->portwidth << 3)); - printf (" Size: %ld MB in %d Sectors\n", - info->size >> 20, info->sector_count); - printf (" Erase timeout %ld ms, write timeout %ld ms, buffer write timeout %ld ms, buffer size %d\n", info->erase_blk_tout, info->write_tout, info->buffer_write_tout, info->buffer_size); - - printf (" Sector Start Addresses:"); - for (i = 0; i < info->sector_count; ++i) { - if ((i % 5) == 0) - printf ("\n"); - printf (" %08lX%5s", - info->start[i], info->protect[i] ? " (RO)" : " "); - } - printf ("\n"); - return; -} - -/*----------------------------------------------------------------------- - * Copy memory to flash, returns: - * 0 - OK - * 1 - write timeout - * 2 - Flash not erased - */ -int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt) -{ - ulong wp; - ulong cp; - int aln; - cfiword_t cword; - int i, rc; - - /* get lower aligned address */ - wp = (addr & ~(info->portwidth - 1)); - - /* handle unaligned start */ - if ((aln = addr - wp) != 0) { - cword.l = 0; - cp = wp; - for (i = 0; i < aln; ++i, ++cp) - flash_add_byte (info, &cword, (*(uchar *) cp)); - - for (; (i < info->portwidth) && (cnt > 0); i++) { - flash_add_byte (info, &cword, *src++); - cnt--; - cp++; - } - for (; (cnt == 0) && (i < info->portwidth); ++i, ++cp) - flash_add_byte (info, &cword, (*(uchar *) cp)); - if ((rc = flash_write_cfiword (info, wp, cword)) != 0) - return rc; - wp = cp; - } -#ifdef CONFIG_SYS_FLASH_USE_BUFFER_WRITE - while (cnt >= info->portwidth) { - i = info->buffer_size > cnt ? cnt : info->buffer_size; - if ((rc = flash_write_cfibuffer (info, wp, src, i)) != ERR_OK) - return rc; - wp += i; - src += i; - cnt -= i; - } -#else - /* handle the aligned part */ - while (cnt >= info->portwidth) { - cword.l = 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_SYS_FLASH_USE_BUFFER_WRITE */ - if (cnt == 0) { - return (0); - } - - /* - * handle unaligned tail bytes - */ - cword.l = 0; - for (i = 0, cp = wp; (i < info->portwidth) && (cnt > 0); ++i, ++cp) { - flash_add_byte (info, &cword, *src++); - --cnt; - } - for (; i < info->portwidth; ++i, ++cp) { - flash_add_byte (info, &cword, (*(uchar *) cp)); - } - - return flash_write_cfiword (info, wp, cword); -} - -/*----------------------------------------------------------------------- - */ -int flash_real_protect (flash_info_t * info, long sector, int prot) -{ - int retcode = 0; - - flash_write_cmd (info, sector, 0, FLASH_CMD_CLEAR_STATUS); - flash_write_cmd (info, sector, 0, FLASH_CMD_PROTECT); - if (prot) - flash_write_cmd (info, sector, 0, FLASH_CMD_PROTECT_SET); - else - flash_write_cmd (info, sector, 0, FLASH_CMD_PROTECT_CLEAR); - - if ((retcode = - flash_full_status_check (info, sector, info->erase_blk_tout, - prot ? "protect" : "unprotect")) == 0) { - - info->protect[sector] = prot; - /* Intel's unprotect unprotects all locking */ - if (prot == 0) { - int i; - - for (i = 0; i < info->sector_count; i++) { - if (info->protect[i]) - flash_real_protect (info, i, 1); - } - } - } - - return retcode; -} - -/*----------------------------------------------------------------------- - * 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. - */ -static int flash_status_check (flash_info_t * info, ulong sector, ulong tout, - char *prompt) -{ - ulong start; - - /* Wait for command completion */ - start = get_timer (0); - while (!flash_isset (info, sector, 0, FLASH_STATUS_DONE)) { - if (get_timer (start) > info->erase_blk_tout) { - printf ("Flash %s timeout at address %lx\n", prompt, - info->start[sector]); - flash_write_cmd (info, sector, 0, FLASH_CMD_RESET); - return ERR_TIMOUT; - } - } - return ERR_OK; -} - -/*----------------------------------------------------------------------- - * Wait for XSR.7 to be set, if it times out print an error, otherwise do a full status check. - * This routine sets the flash to read-array mode. - */ -static int flash_full_status_check (flash_info_t * info, ulong sector, - ulong tout, char *prompt) -{ - int retcode; - - retcode = flash_status_check (info, sector, tout, prompt); - if ((retcode == ERR_OK) - && !flash_isequal (info, sector, 0, FLASH_STATUS_DONE)) { - retcode = ERR_INVAL; - printf ("Flash %s error at address %lx\n", prompt, - info->start[sector]); - if (flash_isset - (info, sector, 0, - FLASH_STATUS_ECLBS | FLASH_STATUS_PSLBS)) { - printf ("Command Sequence Error.\n"); - } else if (flash_isset (info, sector, 0, FLASH_STATUS_ECLBS)) { - printf ("Block Erase Error.\n"); - retcode = ERR_NOT_ERASED; - } else if (flash_isset (info, sector, 0, FLASH_STATUS_PSLBS)) { - printf ("Locking Error\n"); - } - if (flash_isset (info, sector, 0, FLASH_STATUS_DPS)) { - printf ("Block locked.\n"); - retcode = ERR_PROTECTED; - } - if (flash_isset (info, sector, 0, FLASH_STATUS_VPENS)) - printf ("Vpp Low Error.\n"); - } - flash_write_cmd (info, sector, 0, FLASH_CMD_RESET); - return retcode; -} - -/*----------------------------------------------------------------------- - */ -static void flash_add_byte (flash_info_t * info, cfiword_t * cword, uchar c) -{ - switch (info->portwidth) { - case FLASH_CFI_8BIT: - cword->c = c; - break; - case FLASH_CFI_16BIT: - cword->w = (cword->w << 8) | c; - break; - case FLASH_CFI_32BIT: - cword->l = (cword->l << 8) | c; - } -} - -/*----------------------------------------------------------------------- - * make a proper sized command based on the port and chip widths - */ -static void flash_make_cmd (flash_info_t * info, uchar cmd, void *cmdbuf) -{ - /*int i; */ - uchar *cp = (uchar *) cmdbuf; - - /* for(i=0; i< info->portwidth; i++) */ - /* *cp++ = ((i+1) % info->chipwidth) ? '\0':cmd; */ - if (info->portwidth == FLASH_CFI_8BIT - && info->chipwidth == FLASH_CFI_16BIT) { - cp[0] = cmd; - } else if (info->portwidth == FLASH_CFI_16BIT - && info->chipwidth == FLASH_CFI_16BIT) { - cp[0] = '\0'; - cp[1] = cmd; - }; -} - -/* - * Write a proper sized command to the correct address - */ -static void flash_write_cmd (flash_info_t * info, int sect, uchar offset, - uchar cmd) -{ - - volatile cfiptr_t addr; - cfiword_t cword; - - addr.cp = flash_make_addr (info, sect, offset); - flash_make_cmd (info, cmd, &cword); - switch (info->portwidth) { - case FLASH_CFI_8BIT: - *addr.cp = cword.c; - break; - case FLASH_CFI_16BIT: - *addr.wp = cword.w; - break; - case FLASH_CFI_32BIT: - *addr.lp = cword.l; - break; - } -} - -/*----------------------------------------------------------------------- - */ -static int flash_isequal (flash_info_t * info, int sect, uchar offset, - uchar cmd) -{ - cfiptr_t cptr; - cfiword_t cword; - int retval; - - cptr.cp = flash_make_addr (info, sect, offset); - flash_make_cmd (info, cmd, &cword); - switch (info->portwidth) { - case FLASH_CFI_8BIT: - retval = (cptr.cp[0] == cword.c); - break; - case FLASH_CFI_16BIT: - retval = (cptr.wp[0] == cword.w); - break; - case FLASH_CFI_32BIT: - retval = (cptr.lp[0] == cword.l); - break; - default: - retval = 0; - break; - } - return retval; -} - -/*----------------------------------------------------------------------- - */ -static int flash_isset (flash_info_t * info, int sect, uchar offset, - uchar cmd) -{ - cfiptr_t cptr; - cfiword_t cword; - int retval; - - cptr.cp = flash_make_addr (info, sect, offset); - flash_make_cmd (info, cmd, &cword); - switch (info->portwidth) { - case FLASH_CFI_8BIT: - retval = ((cptr.cp[0] & cword.c) == cword.c); - break; - case FLASH_CFI_16BIT: - retval = ((cptr.wp[0] & cword.w) == cword.w); - break; - case FLASH_CFI_32BIT: - retval = ((cptr.lp[0] & cword.l) == cword.l); - break; - default: - retval = 0; - break; - } - return retval; -} - -/*----------------------------------------------------------------------- - * detect if flash is compatible with the Common Flash Interface (CFI) - * http://www.jedec.org/download/search/jesd68.pdf - * -*/ -static int flash_detect_cfi (flash_info_t * info) -{ - -#if 0 - for (info->portwidth = FLASH_CFI_8BIT; - info->portwidth <= FLASH_CFI_32BIT; info->portwidth <<= 1) { - for (info->chipwidth = FLASH_CFI_BY8; - info->chipwidth <= info->portwidth; - info->chipwidth <<= 1) { - flash_write_cmd (info, 0, 0, FLASH_CMD_RESET); - flash_write_cmd (info, 0, FLASH_OFFSET_CFI, - FLASH_CMD_CFI); - if (flash_isequal - (info, 0, FLASH_OFFSET_CFI_RESP, 'Q') - && flash_isequal (info, 0, - FLASH_OFFSET_CFI_RESP + 1, 'R') - && flash_isequal (info, 0, - FLASH_OFFSET_CFI_RESP + 2, 'Y')) - return 1; - } - } -#endif - flash_write_cmd (info, 0, 0, FLASH_CMD_RESET); - flash_write_cmd (info, 0, FLASH_OFFSET_CFI, FLASH_CMD_CFI); - if (flash_isequal (info, 0, FLASH_OFFSET_CFI_RESP, 'Q') && - flash_isequal (info, 0, FLASH_OFFSET_CFI_RESP + 1, 'R') && - flash_isequal (info, 0, FLASH_OFFSET_CFI_RESP + 2, 'Y')) { - return 1; - } else { - return 0; - }; -} - -/* - * The following code cannot be run from FLASH! - * - */ -static ulong flash_get_size (ulong base, int banknum) -{ - flash_info_t *info = &flash_info[banknum]; - int i, j; - int sect_cnt; - unsigned long sector; - unsigned long tmp; - int size_ratio; - uchar num_erase_regions; - int erase_region_size; - int erase_region_count; - - info->start[0] = base; - - if (flash_detect_cfi (info)) { -#ifdef DEBUG_FLASH - printf ("portwidth=%d chipwidth=%d\n", info->portwidth, info->chipwidth); /* test-only */ -#endif - size_ratio = 1; /* info->portwidth / info->chipwidth; */ - num_erase_regions = - flash_read_uchar (info, - FLASH_OFFSET_NUM_ERASE_REGIONS); -#ifdef DEBUG_FLASH - printf ("found %d erase regions\n", num_erase_regions); -#endif - sect_cnt = 0; - sector = base; - for (i = 0; i < num_erase_regions; i++) { - if (i > NUM_ERASE_REGIONS) { - printf ("%d erase regions found, only %d used\n", num_erase_regions, NUM_ERASE_REGIONS); - break; - } - tmp = flash_read_long (info, 0, - FLASH_OFFSET_ERASE_REGIONS); - erase_region_count = (tmp & 0xffff) + 1; - tmp >>= 16; - erase_region_size = - (tmp & 0xffff) ? ((tmp & 0xffff) * 256) : 128; - for (j = 0; j < erase_region_count; j++) { - info->start[sect_cnt] = sector; - sector += (erase_region_size * size_ratio); - info->protect[sect_cnt] = - flash_isset (info, sect_cnt, - FLASH_OFFSET_PROTECT, - FLASH_STATUS_PROTECT); - sect_cnt++; - } - } - - info->sector_count = sect_cnt; - /* multiply the size by the number of chips */ - info->size = - (1 << flash_read_uchar (info, FLASH_OFFSET_SIZE)) * - size_ratio; - info->buffer_size = - (1 << - flash_read_ushort (info, 0, - FLASH_OFFSET_BUFFER_SIZE)); - tmp = 1 << flash_read_uchar (info, FLASH_OFFSET_ETOUT); - info->erase_blk_tout = - (tmp * - (1 << - flash_read_uchar (info, FLASH_OFFSET_EMAX_TOUT))); - tmp = 1 << flash_read_uchar (info, FLASH_OFFSET_WBTOUT); - info->buffer_write_tout = - (tmp * - (1 << - flash_read_uchar (info, FLASH_OFFSET_WBMAX_TOUT))); - tmp = 1 << flash_read_uchar (info, FLASH_OFFSET_WTOUT); - info->write_tout = - (tmp * - (1 << - flash_read_uchar (info, - FLASH_OFFSET_WMAX_TOUT))) / 1000; - info->flash_id = FLASH_MAN_CFI; - } - - flash_write_cmd (info, 0, 0, FLASH_CMD_RESET); - return (info->size); -} - -/*----------------------------------------------------------------------- - */ -static int flash_write_cfiword (flash_info_t * info, ulong dest, - cfiword_t cword) -{ - cfiptr_t cptr; - int flag; - - 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; - 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 */ |