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Diffstat (limited to 'board/amirix/ap1000/flash.c')
| -rwxr-xr-x | board/amirix/ap1000/flash.c | 903 |
1 files changed, 903 insertions, 0 deletions
diff --git a/board/amirix/ap1000/flash.c b/board/amirix/ap1000/flash.c new file mode 100755 index 0000000..1a3b252 --- /dev/null +++ b/board/amirix/ap1000/flash.c @@ -0,0 +1,903 @@ +/** + * @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[CFG_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 CFG_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 (CFG_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 (CFG_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 CFG_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 /* CFG_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 ctladdr; + cfiptr_t cptr; + int flag; + + ctladdr.cp = flash_make_addr (info, 0, 0); + cptr.cp = (uchar *) dest; + + /* Check if Flash is (sufficiently) erased */ + switch (info->portwidth) { + case FLASH_CFI_8BIT: + flag = ((cptr.cp[0] & cword.c) == cword.c); + break; + case FLASH_CFI_16BIT: + flag = ((cptr.wp[0] & cword.w) == cword.w); + break; + case FLASH_CFI_32BIT: + flag = ((cptr.lp[0] & cword.l) == cword.l); + break; + default: + return 2; + } + if (!flag) + return 2; + + /* Disable interrupts which might cause a timeout here */ + flag = disable_interrupts (); + + flash_write_cmd (info, 0, 0, FLASH_CMD_CLEAR_STATUS); + flash_write_cmd (info, 0, 0, FLASH_CMD_WRITE); + + switch (info->portwidth) { + case FLASH_CFI_8BIT: + cptr.cp[0] = cword.c; + break; + case FLASH_CFI_16BIT: + cptr.wp[0] = cword.w; + break; + case FLASH_CFI_32BIT: + cptr.lp[0] = cword.l; + break; + } + + /* re-enable interrupts if necessary */ + if (flag) + enable_interrupts (); + + return flash_full_status_check (info, 0, info->write_tout, "write"); +} + +#ifdef CFG_FLASH_USE_BUFFER_WRITE + +/* loop through the sectors from the highest address + * when the passed address is greater or equal to the sector address + * we have a match + */ +static int find_sector (flash_info_t * info, ulong addr) +{ + int sector; + + for (sector = info->sector_count - 1; sector >= 0; sector--) { + if (addr >= info->start[sector]) + break; + } + return sector; +} + +static int flash_write_cfibuffer (flash_info_t * info, ulong dest, uchar * cp, + int len) +{ + + int sector; + int cnt; + int retcode; + volatile cfiptr_t src; + volatile cfiptr_t dst; + + src.cp = cp; + dst.cp = (uchar *) dest; + sector = find_sector (info, dest); + flash_write_cmd (info, sector, 0, FLASH_CMD_CLEAR_STATUS); + flash_write_cmd (info, sector, 0, FLASH_CMD_WRITE_TO_BUFFER); + if ((retcode = + flash_status_check (info, sector, info->buffer_write_tout, + "write to buffer")) == ERR_OK) { + switch (info->portwidth) { + case FLASH_CFI_8BIT: + cnt = len; + break; + case FLASH_CFI_16BIT: + cnt = len >> 1; + break; + case FLASH_CFI_32BIT: + cnt = len >> 2; + break; + default: + return ERR_INVAL; + break; + } + flash_write_cmd (info, sector, 0, (uchar) cnt - 1); + while (cnt-- > 0) { + switch (info->portwidth) { + case FLASH_CFI_8BIT: + *dst.cp++ = *src.cp++; + break; + case FLASH_CFI_16BIT: + *dst.wp++ = *src.wp++; + break; + case FLASH_CFI_32BIT: + *dst.lp++ = *src.lp++; + break; + default: + return ERR_INVAL; + break; + } + } + flash_write_cmd (info, sector, 0, + FLASH_CMD_WRITE_BUFFER_CONFIRM); + retcode = + flash_full_status_check (info, sector, + info->buffer_write_tout, + "buffer write"); + } + flash_write_cmd (info, sector, 0, FLASH_CMD_CLEAR_STATUS); + return retcode; +} +#endif /* CFG_USE_FLASH_BUFFER_WRITE */ |