X-Git-Url: https://gerrit.opnfv.org/gerrit/gitweb?a=blobdiff_plain;f=qemu%2Froms%2Fu-boot%2Fboard%2Fesd%2Fcpci5200%2Fstrataflash.c;fp=qemu%2Froms%2Fu-boot%2Fboard%2Fesd%2Fcpci5200%2Fstrataflash.c;h=7dc2e58c12d897a94e7f3b6e42573b22e35d3b2f;hb=e44e3482bdb4d0ebde2d8b41830ac2cdb07948fb;hp=0000000000000000000000000000000000000000;hpb=9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00;p=kvmfornfv.git diff --git a/qemu/roms/u-boot/board/esd/cpci5200/strataflash.c b/qemu/roms/u-boot/board/esd/cpci5200/strataflash.c new file mode 100644 index 000000000..7dc2e58c1 --- /dev/null +++ b/qemu/roms/u-boot/board/esd/cpci5200/strataflash.c @@ -0,0 +1,786 @@ +/* + * (C) Copyright 2002 + * Brad Kemp, Seranoa Networks, Brad.Kemp@seranoa.com + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include +#include +#include + +#undef DEBUG_FLASH +/* + * This file implements a Common Flash Interface (CFI) driver for U-Boot. + * 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 + */ +inline uchar *flash_make_addr(flash_info_t * info, int sect, int offset) +{ + return ((uchar *) (info->start[sect] + (offset * info->portwidth))); +} + +/*----------------------------------------------------------------------- + * read a character at a port width address + */ +inline uchar flash_read_uchar(flash_info_t * info, uchar offset) +{ + uchar *cp; + cp = flash_make_addr(info, 0, offset); + return (cp[info->portwidth - 1]); +} + +/*----------------------------------------------------------------------- + * read a short word by swapping for ppc format. + */ +ushort flash_read_ushort(flash_info_t * info, int sect, uchar offset) +{ + uchar *addr; + + addr = flash_make_addr(info, sect, offset); + return ((addr[(2 * info->portwidth) - 1] << 8) | + addr[info->portwidth - 1]); + +} + +/*----------------------------------------------------------------------- + * 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) +{ + uchar *addr; + + addr = flash_make_addr(info, sect, offset); + return ((addr[(2 * info->portwidth) - 1] << 24) | + (addr[(info->portwidth) - 1] << 16) | + (addr[(4 * info->portwidth) - 1] << 8) | + addr[(3 * info->portwidth) - 1]); + +} + +/*----------------------------------------------------------------------- + */ +unsigned long flash_init(void) +{ + unsigned long size; + int i; + unsigned long address; + + /* The flash is positioned back to back, with the demultiplexing of the chip + * based on the A24 address line. + * + */ + + address = CONFIG_SYS_FLASH_BASE; + size = 0; + + /* Init: no FLASHes known */ + for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; ++i) { + flash_info[i].flash_id = FLASH_UNKNOWN; + size += flash_info[i].size = flash_get_size(address, i); + address += CONFIG_SYS_FLASH_INCREMENT; + if (flash_info[i].flash_id == FLASH_UNKNOWN) { + printf + ("## Unknown FLASH on Bank %d - Size = 0x%08lx = %ld MB\n", + i, flash_info[0].size, flash_info[i].size << 20); + } + } + +#if 0 /* test-only */ + /* Monitor protection ON by default */ +#if (CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE) + for (i = 0; + flash_info[0].start[i] < CONFIG_SYS_MONITOR_BASE + monitor_flash_len - 1; + i++) + (void)flash_real_protect(&flash_info[0], i, 1); +#endif +#endif + + 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 (%d x %d)", + (info->portwidth << 3), (info->chipwidth << 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; +} + +/* + * 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 = 0; + uchar num_erase_regions; + int erase_region_size; + int erase_region_count; + + info->start[0] = base; +#if 0 + invalidate_dcache_range(base, base + 0x400); +#endif + if (flash_detect_cfi(info)) { + + size_ratio = info->portwidth / info->chipwidth; + num_erase_regions = + flash_read_uchar(info, FLASH_OFFSET_NUM_ERASE_REGIONS); + + 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); +#ifdef DEBUG_FLASH + printf("portwidth=%d chipwidth=%d\n", info->portwidth, info->chipwidth); /* test-only */ +#endif +#ifdef DEBUG_FLASH + printf("found %d erase regions\n", num_erase_regions); +#endif +#ifdef DEBUG_FLASH + printf("size=%08x sectors=%08x \n", info->size, info->sector_count); +#endif + 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 */