| /** |
| * @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 */ |