| /* |
| * (C) Copyright 2002-2004 |
| * Brad Kemp, Seranoa Networks, Brad.Kemp@seranoa.com |
| * |
| * Copyright (C) 2003 Arabella Software Ltd. |
| * Yuli Barcohen <yuli@arabellasw.com> |
| * |
| * Copyright (C) 2004 |
| * Ed Okerson |
| * |
| * Copyright (C) 2006 |
| * Tolunay Orkun <listmember@orkun.us> |
| * |
| * 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 |
| * |
| */ |
| |
| /* The DEBUG define must be before common to enable debugging */ |
| /* #define DEBUG */ |
| |
| #include <common.h> |
| #include <asm/byteorder.h> |
| #include <environment.h> |
| #include <clock.h> |
| #include <init.h> |
| #include <malloc.h> |
| #include <asm/io.h> |
| #include <errno.h> |
| #include <progress.h> |
| #include "cfi_flash.h" |
| |
| /* |
| * This file implements a Common Flash Interface (CFI) driver for barebox. |
| * 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. |
| * |
| * 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 |
| * AMD CFI Specification, Release 2.0 December 1, 2001 |
| * AMD/Spansion Application Note: Migration from Single-byte to Three-byte |
| * Device IDs, Publication Number 25538 Revision A, November 8, 2001 |
| * |
| */ |
| |
| static uint flash_offset_cfi[2]={FLASH_OFFSET_CFI,FLASH_OFFSET_CFI_ALT}; |
| |
| /* |
| * Check if chip width is defined. If not, start detecting with 8bit. |
| */ |
| #ifndef CFG_FLASH_CFI_WIDTH |
| #define CFG_FLASH_CFI_WIDTH FLASH_CFI_8BIT |
| #endif |
| |
| |
| /* |
| * Functions |
| */ |
| |
| static void flash_add_byte (struct flash_info *info, cfiword_t * cword, uchar c) |
| { |
| if (bankwidth_is_1(info)) { |
| *cword = c; |
| return; |
| } |
| |
| #if __BYTE_ORDER == __BIG_ENDIAN |
| *cword = (*cword << 8) | c; |
| #else |
| |
| if (bankwidth_is_2(info)) |
| *cword = (*cword >> 8) | (u16)c << 8; |
| else if (bankwidth_is_4(info)) |
| *cword = (*cword >> 8) | (u32)c << 24; |
| else if (bankwidth_is_8(info)) |
| *cword = (*cword >> 8) | (u64)c << 56; |
| #endif |
| } |
| |
| static int flash_write_cfiword (struct flash_info *info, ulong dest, |
| cfiword_t cword) |
| { |
| void *dstaddr = (void *)dest; |
| int flag; |
| |
| /* Check if Flash is (sufficiently) erased */ |
| if (bankwidth_is_1(info)) |
| flag = ((flash_read8(dstaddr) & cword) == cword); |
| else if (bankwidth_is_2(info)) |
| flag = ((flash_read16(dstaddr) & cword) == cword); |
| else if (bankwidth_is_4(info)) |
| flag = ((flash_read32(dstaddr) & cword) == cword); |
| else if (bankwidth_is_8(info)) |
| flag = ((flash_read64(dstaddr) & cword) == cword); |
| else |
| return 2; |
| |
| if (!flag) |
| return 2; |
| |
| info->cfi_cmd_set->flash_prepare_write(info); |
| |
| flash_write_word(info, cword, (void *)dest); |
| |
| return flash_status_check (info, find_sector (info, dest), |
| info->write_tout, "write"); |
| } |
| |
| #ifdef DEBUG |
| /* |
| * Debug support |
| */ |
| void print_longlong (char *str, unsigned long long data) |
| { |
| int i; |
| char *cp; |
| |
| cp = (unsigned char *) &data; |
| for (i = 0; i < 8; i++) |
| sprintf (&str[i * 2], "%2.2x", *cp++); |
| } |
| |
| static void flash_printqry (struct cfi_qry *qry) |
| { |
| u8 *p = (u8 *)qry; |
| int x, y; |
| unsigned char c; |
| |
| for (x = 0; x < sizeof(struct cfi_qry); x += 16) { |
| debug("%02x : ", x); |
| for (y = 0; y < 16; y++) |
| debug("%2.2x ", p[x + y]); |
| debug(" "); |
| for (y = 0; y < 16; y++) { |
| c = p[x + y]; |
| if (c >= 0x20 && c <= 0x7e) |
| debug("%c", c); |
| else |
| debug("."); |
| } |
| debug("\n"); |
| } |
| } |
| #endif |
| |
| /* |
| * read a character at a port width address |
| */ |
| uchar flash_read_uchar (struct flash_info *info, uint offset) |
| { |
| uchar *cp = flash_make_addr(info, 0, offset); |
| #if __BYTE_ORDER == __LITTLE_ENDIAN |
| return flash_read8(cp); |
| #else |
| return flash_read8(cp + info->portwidth - 1); |
| #endif |
| } |
| |
| /* |
| * read a long word by picking the least significant byte of each maximum |
| * port size word. Swap for ppc format. |
| */ |
| static ulong flash_read_long (struct flash_info *info, flash_sect_t sect, uint offset) |
| { |
| uchar *addr; |
| ulong retval; |
| |
| #ifdef DEBUG |
| int x; |
| #endif |
| addr = flash_make_addr (info, sect, offset); |
| |
| #ifdef DEBUG |
| debug ("long addr is at %p info->portwidth = %d\n", addr, |
| info->portwidth); |
| for (x = 0; x < 4 * info->portwidth; x++) { |
| debug ("addr[%x] = 0x%x\n", x, flash_read8(addr + x)); |
| } |
| #endif |
| #if __BYTE_ORDER == __LITTLE_ENDIAN |
| retval = ((flash_read8(addr) << 16) | |
| (flash_read8(addr + info->portwidth) << 24) | |
| (flash_read8(addr + 2 * info->portwidth)) | |
| (flash_read8(addr + 3 * info->portwidth) << 8)); |
| #else |
| retval = ((flash_read8(addr + 2 * info->portwidth - 1) << 24) | |
| (flash_read8(addr + info->portwidth - 1) << 16) | |
| (flash_read8(addr + 4 * info->portwidth - 1) << 8) | |
| (flash_read8(addr + 3 * info->portwidth - 1))); |
| #endif |
| return retval; |
| } |
| |
| /* |
| * detect if flash is compatible with the Common Flash Interface (CFI) |
| * http://www.jedec.org/download/search/jesd68.pdf |
| * |
| */ |
| u32 jedec_read_mfr(struct flash_info *info) |
| { |
| int bank = 0; |
| uchar mfr; |
| |
| /* According to JEDEC "Standard Manufacturer's Identification Code" |
| * (http://www.jedec.org/download/search/jep106W.pdf) |
| * several first banks can contain 0x7f instead of actual ID |
| */ |
| do { |
| mfr = flash_read_uchar (info, |
| (bank << 8) | FLASH_OFFSET_MANUFACTURER_ID); |
| bank++; |
| } while (mfr == FLASH_ID_CONTINUATION); |
| |
| return mfr; |
| } |
| |
| static void flash_read_cfi (struct flash_info *info, void *buf, |
| unsigned int start, size_t len) |
| { |
| u8 *p = buf; |
| unsigned int i; |
| |
| for (i = 0; i < len; i++) |
| p[i] = flash_read_uchar(info, start + i); |
| } |
| |
| static int flash_detect_cfi (struct flash_info *info, struct cfi_qry *qry) |
| { |
| int cfi_offset; |
| debug ("flash detect cfi\n"); |
| |
| for (info->portwidth = CFG_FLASH_CFI_WIDTH; |
| info->portwidth <= FLASH_CFI_64BIT; info->portwidth <<= 1) { |
| for (info->chipwidth = FLASH_CFI_BY8; |
| info->chipwidth <= info->portwidth; |
| info->chipwidth <<= 1) { |
| flash_write_cmd (info, 0, 0, AMD_CMD_RESET); |
| flash_write_cmd (info, 0, 0, FLASH_CMD_RESET); |
| for (cfi_offset=0; cfi_offset < sizeof(flash_offset_cfi)/sizeof(uint); cfi_offset++) { |
| flash_write_cmd (info, 0, flash_offset_cfi[cfi_offset], 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')) { |
| flash_read_cfi(info, qry, FLASH_OFFSET_CFI_RESP, |
| sizeof(struct cfi_qry)); |
| info->interface = le16_to_cpu(qry->interface_desc); |
| |
| info->cfi_offset=flash_offset_cfi[cfi_offset]; |
| debug ("device interface is %d\n", |
| info->interface); |
| debug ("found port %d chip %d ", |
| info->portwidth, info->chipwidth); |
| debug ("port %d bits chip %d bits\n", |
| info->portwidth << CFI_FLASH_SHIFT_WIDTH, |
| info->chipwidth << CFI_FLASH_SHIFT_WIDTH); |
| return 1; |
| } |
| } |
| } |
| } |
| debug ("not found\n"); |
| return 0; |
| } |
| |
| /* |
| * The following code cannot be run from FLASH! |
| */ |
| static ulong flash_get_size (struct flash_info *info, ulong base) |
| { |
| int i, j; |
| flash_sect_t sect_cnt; |
| unsigned long sector; |
| unsigned long tmp; |
| int size_ratio; |
| uchar num_erase_regions; |
| int erase_region_size; |
| int erase_region_count; |
| int cur_offset = 0; |
| struct cfi_qry qry; |
| |
| memset(&qry, 0, sizeof(qry)); |
| |
| info->ext_addr = 0; |
| info->cfi_version = 0; |
| #ifdef CFG_FLASH_PROTECTION |
| info->legacy_unlock = 0; |
| #endif |
| |
| /* first only malloc space for the first sector */ |
| info->start = xmalloc(sizeof(ulong)); |
| |
| info->start[0] = base; |
| info->protect = 0; |
| |
| if (flash_detect_cfi (info, &qry)) { |
| info->vendor = le16_to_cpu(qry.p_id); |
| info->ext_addr = le16_to_cpu(qry.p_adr); |
| num_erase_regions = qry.num_erase_regions; |
| |
| if (info->ext_addr) { |
| info->cfi_version = (ushort) flash_read_uchar (info, |
| info->ext_addr + 3) << 8; |
| info->cfi_version |= (ushort) flash_read_uchar (info, |
| info->ext_addr + 4); |
| } |
| |
| #ifdef DEBUG |
| flash_printqry (&qry); |
| #endif |
| |
| switch (info->vendor) { |
| #ifdef CONFIG_DRIVER_CFI_INTEL |
| case CFI_CMDSET_INTEL_EXTENDED: |
| case CFI_CMDSET_INTEL_STANDARD: |
| info->cfi_cmd_set = &cfi_cmd_set_intel; |
| break; |
| #endif |
| #ifdef CONFIG_DRIVER_CFI_AMD |
| case CFI_CMDSET_AMD_STANDARD: |
| case CFI_CMDSET_AMD_EXTENDED: |
| info->cfi_cmd_set = &cfi_cmd_set_amd; |
| break; |
| #endif |
| default: |
| printf("unsupported vendor\n"); |
| return 0; |
| } |
| info->cfi_cmd_set->flash_read_jedec_ids (info); |
| flash_write_cmd (info, 0, info->cfi_offset, FLASH_CMD_CFI); |
| |
| info->cfi_cmd_set->flash_fixup (info, &qry); |
| |
| debug ("manufacturer is %d\n", info->vendor); |
| debug ("manufacturer id is 0x%x\n", info->manufacturer_id); |
| debug ("device id is 0x%x\n", info->device_id); |
| debug ("device id2 is 0x%x\n", info->device_id2); |
| debug ("cfi version is 0x%04x\n", info->cfi_version); |
| |
| size_ratio = info->portwidth / info->chipwidth; |
| /* if the chip is x8/x16 reduce the ratio by half */ |
| if ((info->interface == FLASH_CFI_X8X16) |
| && (info->chipwidth == FLASH_CFI_BY8)) { |
| size_ratio >>= 1; |
| } |
| debug ("size_ratio %d port %d bits chip %d bits\n", |
| size_ratio, info->portwidth << CFI_FLASH_SHIFT_WIDTH, |
| info->chipwidth << CFI_FLASH_SHIFT_WIDTH); |
| debug ("found %d erase regions\n", num_erase_regions); |
| info->eraseregions = xzalloc(sizeof(*(info->eraseregions)) * num_erase_regions); |
| info->numeraseregions = num_erase_regions; |
| sect_cnt = 0; |
| sector = base; |
| |
| for (i = 0; i < num_erase_regions; i++) { |
| struct mtd_erase_region_info *region = &info->eraseregions[i]; |
| |
| if (i > NUM_ERASE_REGIONS) { |
| printf ("%d erase regions found, only %d used\n", |
| num_erase_regions, NUM_ERASE_REGIONS); |
| break; |
| } |
| |
| tmp = le32_to_cpu(qry.erase_region_info[i]); |
| debug("erase region %u: 0x%08lx\n", i, tmp); |
| |
| erase_region_count = (tmp & 0xffff) + 1; |
| tmp >>= 16; |
| erase_region_size = |
| (tmp & 0xffff) ? ((tmp & 0xffff) * 256) : 128; |
| debug ("erase_region_count = %d erase_region_size = %d\n", |
| erase_region_count, erase_region_size); |
| |
| region->offset = cur_offset; |
| region->erasesize = erase_region_size; |
| region->numblocks = erase_region_count; |
| cur_offset += erase_region_size * erase_region_count; |
| |
| /* increase the space malloced for the sector start addresses */ |
| info->start = xrealloc(info->start, sizeof(ulong) * (erase_region_count + sect_cnt)); |
| info->protect = xrealloc(info->protect, sizeof(uchar) * (erase_region_count + sect_cnt)); |
| |
| for (j = 0; j < erase_region_count; j++) { |
| info->start[sect_cnt] = sector; |
| sector += (erase_region_size * size_ratio); |
| |
| /* |
| * Only read protection status from supported devices (intel...) |
| */ |
| switch (info->vendor) { |
| case CFI_CMDSET_INTEL_EXTENDED: |
| case CFI_CMDSET_INTEL_STANDARD: |
| info->protect[sect_cnt] = |
| flash_isset (info, sect_cnt, |
| FLASH_OFFSET_PROTECT, |
| FLASH_STATUS_PROTECT); |
| break; |
| default: |
| info->protect[sect_cnt] = 0; /* default: not protected */ |
| } |
| |
| sect_cnt++; |
| } |
| } |
| |
| info->sector_count = sect_cnt; |
| /* multiply the size by the number of chips */ |
| info->size = (1 << qry.dev_size) * size_ratio; |
| info->buffer_size = (1 << le16_to_cpu(qry.max_buf_write_size)); |
| info->erase_blk_tout = 1 << (qry.block_erase_timeout_typ + |
| qry.block_erase_timeout_max); |
| info->buffer_write_tout = 1 << (qry.buf_write_timeout_typ + |
| qry.buf_write_timeout_max); |
| info->write_tout = 1 << (qry.word_write_timeout_typ + |
| qry.word_write_timeout_max); |
| info->flash_id = FLASH_MAN_CFI; |
| if ((info->interface == FLASH_CFI_X8X16) && (info->chipwidth == FLASH_CFI_BY8)) { |
| info->portwidth >>= 1; /* XXX - Need to test on x8/x16 in parallel. */ |
| } |
| flash_write_cmd (info, 0, 0, info->cmd_reset); |
| } |
| |
| return info->size; |
| } |
| |
| /* loop through the sectors from the highest address |
| * when the passed address is greater or equal to the sector address |
| * we have a match |
| */ |
| flash_sect_t find_sector (struct flash_info *info, ulong addr) |
| { |
| flash_sect_t sector; |
| |
| for (sector = info->sector_count - 1; sector >= 0; sector--) { |
| if (addr >= info->start[sector]) |
| break; |
| } |
| return sector; |
| } |
| |
| static int __cfi_erase(struct cdev *cdev, size_t count, unsigned long offset, |
| int verbose) |
| { |
| struct flash_info *finfo = (struct flash_info *)cdev->priv; |
| unsigned long start, end; |
| int i, ret = 0; |
| |
| debug("%s: erase 0x%08lx (size %d)\n", __func__, offset, count); |
| |
| start = find_sector(finfo, cdev->dev->map_base + offset); |
| end = find_sector(finfo, cdev->dev->map_base + offset + count - 1); |
| |
| if (verbose) |
| init_progression_bar(end - start); |
| |
| for (i = start; i <= end; i++) { |
| ret = finfo->cfi_cmd_set->flash_erase_one(finfo, i); |
| if (ret) |
| goto out; |
| |
| if (ctrlc()) { |
| ret = -EINTR; |
| goto out; |
| } |
| |
| if (verbose) |
| show_progress(i - start); |
| } |
| out: |
| if (verbose) |
| putchar('\n'); |
| return ret; |
| } |
| |
| static int cfi_erase(struct cdev *cdev, size_t count, unsigned long offset) |
| { |
| return __cfi_erase(cdev, count, offset, 1); |
| } |
| |
| /* |
| * Copy memory to flash, returns: |
| * 0 - OK |
| * 1 - write timeout |
| * 2 - Flash not erased |
| */ |
| static int write_buff (struct flash_info *info, const uchar * src, ulong addr, ulong cnt) |
| { |
| ulong wp; |
| uchar *p; |
| int aln; |
| cfiword_t cword; |
| int i, rc; |
| |
| #ifdef CONFIG_CFI_BUFFER_WRITE |
| int buffered_size; |
| #endif |
| /* get lower aligned address */ |
| wp = (addr & ~(info->portwidth - 1)); |
| |
| /* handle unaligned start */ |
| if ((aln = addr - wp) != 0) { |
| cword = 0; |
| p = (uchar*)wp; |
| for (i = 0; i < aln; ++i) |
| flash_add_byte (info, &cword, flash_read8(p + i)); |
| |
| for (; (i < info->portwidth) && (cnt > 0); i++) { |
| flash_add_byte (info, &cword, *src++); |
| cnt--; |
| } |
| for (; (cnt == 0) && (i < info->portwidth); ++i) |
| flash_add_byte (info, &cword, flash_read8(p + i)); |
| |
| rc = flash_write_cfiword (info, wp, cword); |
| if (rc != 0) |
| return rc; |
| |
| wp += i; |
| } |
| |
| /* handle the aligned part */ |
| #ifdef CONFIG_CFI_BUFFER_WRITE |
| buffered_size = (info->portwidth / info->chipwidth); |
| buffered_size *= info->buffer_size; |
| while (cnt >= info->portwidth) { |
| /* prohibit buffer write when buffer_size is 1 */ |
| if (info->buffer_size == 1) { |
| cword = 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; |
| continue; |
| } |
| |
| /* write buffer until next buffered_size aligned boundary */ |
| i = buffered_size - (wp % buffered_size); |
| if (i > cnt) |
| i = cnt; |
| if ((rc = info->cfi_cmd_set->flash_write_cfibuffer (info, wp, src, i)) != ERR_OK) |
| return rc; |
| i -= i & (info->portwidth - 1); |
| wp += i; |
| src += i; |
| cnt -= i; |
| } |
| #else |
| while (cnt >= info->portwidth) { |
| cword = 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_CFI_BUFFER_WRITE */ |
| if (cnt == 0) { |
| return 0; |
| } |
| |
| /* |
| * handle unaligned tail bytes |
| */ |
| cword = 0; |
| p = (uchar*)wp; |
| for (i = 0; (i < info->portwidth) && (cnt > 0); ++i) { |
| flash_add_byte (info, &cword, *src++); |
| --cnt; |
| } |
| for (; i < info->portwidth; ++i) { |
| flash_add_byte (info, &cword, flash_read8(p + i)); |
| } |
| |
| return flash_write_cfiword (info, wp, cword); |
| } |
| |
| static int flash_real_protect (struct flash_info *info, long sector, int prot) |
| { |
| int retcode = 0; |
| |
| retcode = info->cfi_cmd_set->flash_real_protect(info, sector, prot); |
| |
| if (retcode) |
| return retcode; |
| |
| if ((retcode = |
| flash_status_check (info, sector, info->erase_blk_tout, |
| prot ? "protect" : "unprotect")) == 0) { |
| |
| info->protect[sector] = prot; |
| |
| /* |
| * On some of Intel's flash chips (marked via legacy_unlock) |
| * unprotect unprotects all locking. |
| */ |
| if ((prot == 0) && (info->legacy_unlock)) { |
| flash_sect_t i; |
| |
| for (i = 0; i < info->sector_count; i++) { |
| if (info->protect[i]) |
| flash_real_protect (info, i, 1); |
| } |
| } |
| } |
| return retcode; |
| } |
| |
| static int cfi_protect(struct cdev *cdev, size_t count, unsigned long offset, int prot) |
| { |
| struct flash_info *finfo = (struct flash_info *)cdev->priv; |
| unsigned long start, end; |
| int i, ret = 0; |
| const char *action = (prot? "protect" : "unprotect"); |
| |
| printf("%s: %s 0x%08lx (size %d)\n", __FUNCTION__, |
| action, cdev->dev->map_base + offset, count); |
| |
| start = find_sector(finfo, cdev->dev->map_base + offset); |
| end = find_sector(finfo, cdev->dev->map_base + offset + count - 1); |
| |
| for (i = start; i <= end; i++) { |
| ret = flash_real_protect (finfo, i, prot); |
| if (ret) |
| goto out; |
| } |
| out: |
| putchar('\n'); |
| return ret; |
| } |
| |
| static ssize_t cfi_write(struct cdev *cdev, const void *buf, size_t count, unsigned long offset, ulong flags) |
| { |
| struct flash_info *finfo = (struct flash_info *)cdev->priv; |
| int ret; |
| |
| debug("cfi_write: buf=0x%p addr=0x%08lx count=0x%08x\n",buf, cdev->dev->map_base + offset, count); |
| |
| ret = write_buff (finfo, buf, cdev->dev->map_base + offset, count); |
| return ret == 0 ? count : -1; |
| } |
| |
| static void cfi_info (struct device_d* dev) |
| { |
| struct flash_info *info = (struct flash_info *)dev->priv; |
| int i; |
| |
| if (info->flash_id != FLASH_MAN_CFI) { |
| puts ("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 (" "); |
| switch (info->vendor) { |
| case CFI_CMDSET_INTEL_STANDARD: |
| printf ("Intel Standard"); |
| break; |
| case CFI_CMDSET_INTEL_EXTENDED: |
| printf ("Intel Extended"); |
| break; |
| case CFI_CMDSET_AMD_STANDARD: |
| printf ("AMD Standard"); |
| break; |
| case CFI_CMDSET_AMD_EXTENDED: |
| printf ("AMD Extended"); |
| break; |
| default: |
| printf ("Unknown (%d)", info->vendor); |
| break; |
| } |
| printf (" command set, Manufacturer ID: 0x%02X, Device ID: 0x%02X", |
| info->manufacturer_id, info->device_id); |
| if (info->device_id == 0x7E) { |
| printf("%04X", info->device_id2); |
| } |
| printf ("\n Erase timeout: %ld ms, write timeout: %ld us\n", |
| info->erase_blk_tout, |
| info->write_tout); |
| if (info->buffer_size > 1) { |
| printf (" Buffer write timeout: %ld us, buffer size: %d bytes\n", |
| info->buffer_write_tout, |
| info->buffer_size); |
| } |
| |
| puts ("\n Sector Start Addresses:"); |
| for (i = 0; i < info->sector_count; ++i) { |
| if ((i % 5) == 0) |
| printf ("\n"); |
| #ifdef CFG_FLASH_EMPTY_INFO |
| { |
| int k; |
| int size; |
| int erased; |
| volatile unsigned long *flash; |
| |
| /* |
| * Check if whole sector is erased |
| */ |
| if (i != (info->sector_count - 1)) |
| size = info->start[i + 1] - info->start[i]; |
| else |
| size = info->start[0] + info->size - info->start[i]; |
| erased = 1; |
| flash = (volatile unsigned long *) info->start[i]; |
| size = size >> 2; /* divide by 4 for longword access */ |
| for (k = 0; k < size; k++) { |
| if (*flash++ != 0xffffffff) { |
| erased = 0; |
| break; |
| } |
| } |
| |
| /* print empty and read-only info */ |
| printf (" %08lX %c %s ", |
| info->start[i], |
| erased ? 'E' : ' ', |
| info->protect[i] ? "RO" : " "); |
| } |
| #else /* ! CFG_FLASH_EMPTY_INFO */ |
| printf (" %08lX %s ", |
| info->start[i], |
| info->protect[i] ? "RO" : " "); |
| #endif |
| } |
| putchar('\n'); |
| return; |
| } |
| |
| #if 0 |
| /* |
| * flash_read_user_serial - read the OneTimeProgramming cells |
| */ |
| static void flash_read_user_serial (struct flash_info *info, void *buffer, int offset, |
| int len) |
| { |
| uchar *src; |
| uchar *dst; |
| |
| dst = buffer; |
| src = flash_make_addr (info, 0, FLASH_OFFSET_USER_PROTECTION); |
| flash_write_cmd (info, 0, 0, FLASH_CMD_READ_ID); |
| memcpy (dst, src + offset, len); |
| flash_write_cmd (info, 0, 0, info->cmd_reset); |
| } |
| |
| /* |
| * flash_read_factory_serial - read the device Id from the protection area |
| */ |
| static void flash_read_factory_serial (struct flash_info *info, void *buffer, int offset, |
| int len) |
| { |
| uchar *src; |
| |
| src = flash_make_addr (info, 0, FLASH_OFFSET_INTEL_PROTECTION); |
| flash_write_cmd (info, 0, 0, FLASH_CMD_READ_ID); |
| memcpy (buffer, src + offset, len); |
| flash_write_cmd (info, 0, 0, info->cmd_reset); |
| } |
| |
| #endif |
| |
| int flash_status_check (struct flash_info *info, flash_sect_t sector, |
| uint64_t tout, char *prompt) |
| { |
| return info->cfi_cmd_set->flash_status_check(info, sector, tout, prompt); |
| } |
| |
| /* |
| * 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. |
| */ |
| int flash_generic_status_check (struct flash_info *info, flash_sect_t sector, |
| uint64_t tout, char *prompt) |
| { |
| uint64_t start; |
| |
| tout *= 1000000; |
| |
| /* Wait for command completion */ |
| start = get_time_ns(); |
| while (info->cfi_cmd_set->flash_is_busy (info, sector)) { |
| if (is_timeout(start, tout)) { |
| printf ("Flash %s timeout at address %lx data %lx\n", |
| prompt, info->start[sector], |
| flash_read_long (info, sector, 0)); |
| flash_write_cmd (info, sector, 0, info->cmd_reset); |
| return ERR_TIMOUT; |
| } |
| udelay (1); /* also triggers watchdog */ |
| } |
| return ERR_OK; |
| } |
| |
| /* |
| * make a proper sized command based on the port and chip widths |
| */ |
| void flash_make_cmd(struct flash_info *info, u8 cmd, cfiword_t *cmdbuf) |
| { |
| cfiword_t result = 0; |
| int i = info->portwidth / info->chipwidth; |
| |
| while (i--) |
| result = (result << (8 * info->chipwidth)) | cmd; |
| *cmdbuf = result; |
| } |
| |
| /* |
| * Write a proper sized command to the correct address |
| */ |
| void flash_write_cmd (struct flash_info *info, flash_sect_t sect, uint offset, uchar cmd) |
| { |
| |
| uchar *addr; |
| cfiword_t cword; |
| |
| addr = flash_make_addr (info, sect, offset); |
| flash_make_cmd (info, cmd, &cword); |
| debug("%s: %p %lX %X => %p %llX\n", __FUNCTION__, info, sect, offset, addr, cword); |
| flash_write_word(info, cword, addr); |
| } |
| |
| int flash_isequal (struct flash_info *info, flash_sect_t sect, uint offset, uchar cmd) |
| { |
| void *addr; |
| cfiword_t cword; |
| int retval; |
| |
| addr = flash_make_addr (info, sect, offset); |
| flash_make_cmd (info, cmd, &cword); |
| |
| debug ("is= cmd %x(%c) addr %p ", cmd, cmd, addr); |
| if (bankwidth_is_1(info)) { |
| debug ("is= %x %x\n", flash_read8(addr), (u8)cword); |
| retval = (flash_read8(addr) == cword); |
| } else if (bankwidth_is_2(info)) { |
| debug ("is= %4.4x %4.4x\n", flash_read16(addr), (u16)cword); |
| retval = (flash_read16(addr) == cword); |
| } else if (bankwidth_is_4(info)) { |
| debug ("is= %8.8lx %8.8lx\n", flash_read32(addr), (u32)cword); |
| retval = (flash_read32(addr) == cword); |
| } else if (bankwidth_is_8(info)) { |
| #ifdef DEBUG |
| { |
| char str1[20]; |
| char str2[20]; |
| |
| print_longlong (str1, flash_read32(addr)); |
| print_longlong (str2, cword); |
| debug ("is= %s %s\n", str1, str2); |
| } |
| #endif |
| retval = (flash_read64(addr) == cword); |
| } else |
| retval = 0; |
| |
| return retval; |
| } |
| |
| int flash_isset (struct flash_info *info, flash_sect_t sect, uint offset, uchar cmd) |
| { |
| void *addr = flash_make_addr (info, sect, offset); |
| cfiword_t cword; |
| int retval; |
| |
| flash_make_cmd (info, cmd, &cword); |
| if (bankwidth_is_1(info)) { |
| retval = ((flash_read8(addr) & cword) == cword); |
| } else if (bankwidth_is_2(info)) { |
| retval = ((flash_read16(addr) & cword) == cword); |
| } else if (bankwidth_is_4(info)) { |
| retval = ((flash_read32(addr) & cword) == cword); |
| } else if (bankwidth_is_8(info)) { |
| retval = ((flash_read64(addr) & cword) == cword); |
| } else |
| retval = 0; |
| |
| return retval; |
| } |
| |
| struct file_operations cfi_ops = { |
| .read = mem_read, |
| .write = cfi_write, |
| .lseek = dev_lseek_default, |
| .erase = cfi_erase, |
| .protect = cfi_protect, |
| .memmap = generic_memmap_ro, |
| }; |
| |
| #ifdef CONFIG_PARTITION_NEED_MTD |
| static int cfi_mtd_read(struct mtd_info *mtd, loff_t from, size_t len, |
| size_t *retlen, u_char *buf) |
| { |
| struct flash_info *info = container_of(mtd, struct flash_info, mtd); |
| |
| memcpy(buf, info->base + from, len); |
| *retlen = len; |
| |
| return 0; |
| } |
| |
| static int cfi_mtd_write(struct mtd_info *mtd, loff_t to, size_t len, |
| size_t *retlen, const u_char *buf) |
| { |
| struct flash_info *info = container_of(mtd, struct flash_info, mtd); |
| int ret; |
| |
| ret = write_buff(info, buf, (unsigned long)info->base + to, len); |
| *retlen = len; |
| |
| return ret; |
| } |
| |
| static int cfi_mtd_erase(struct mtd_info *mtd, struct erase_info *instr) |
| { |
| struct flash_info *info = container_of(mtd, struct flash_info, mtd); |
| struct cdev *cdev = &info->cdev; |
| int ret; |
| |
| ret = __cfi_erase(cdev, instr->len, instr->addr, 0); |
| |
| if (ret) { |
| instr->state = MTD_ERASE_FAILED; |
| return -EIO; |
| } |
| |
| instr->state = MTD_ERASE_DONE; |
| mtd_erase_callback(instr); |
| |
| return 0; |
| } |
| |
| static void cfi_init_mtd(struct flash_info *info) |
| { |
| struct mtd_info *mtd = &info->mtd; |
| |
| mtd->read = cfi_mtd_read; |
| mtd->write = cfi_mtd_write; |
| mtd->erase = cfi_mtd_erase; |
| mtd->size = info->size; |
| mtd->name = info->cdev.name; |
| |
| if (info->numeraseregions < 2) |
| mtd->erasesize = info->eraseregions[0].erasesize; |
| else |
| mtd->erasesize = info->eraseregions[1].erasesize; |
| |
| mtd->writesize = 1; |
| mtd->subpage_sft = 0; |
| mtd->eraseregions = info->eraseregions; |
| mtd->numeraseregions = info->numeraseregions; |
| mtd->flags = MTD_CAP_NORFLASH; |
| info->cdev.mtd = mtd; |
| } |
| #endif |
| |
| static int cfi_probe (struct device_d *dev) |
| { |
| struct flash_info *info = xzalloc(sizeof(*info)); |
| |
| dev->priv = (void *)info; |
| |
| printf("cfi_probe: %s base: 0x%08x size: 0x%08x\n", dev->name, dev->map_base, dev->size); |
| |
| /* Init: no FLASHes known */ |
| info->flash_id = FLASH_UNKNOWN; |
| info->cmd_reset = FLASH_CMD_RESET; |
| info->size = flash_get_size(info, dev->map_base); |
| info->base = (void __iomem *)dev->map_base; |
| |
| if (dev->size == 0) { |
| printf("cfi_probe: size : 0x%08lx\n", info->size); |
| dev->size = info->size; |
| } |
| |
| if (info->flash_id == FLASH_UNKNOWN) { |
| printf ("## Unknown FLASH on Bank at 0x%08x - Size = 0x%08lx = %ld MB\n", |
| dev->map_base, info->size, info->size << 20); |
| return -ENODEV; |
| } |
| |
| info->cdev.name = asprintf("nor%d", dev->id); |
| info->cdev.size = info->size; |
| info->cdev.dev = dev; |
| info->cdev.ops = &cfi_ops; |
| info->cdev.priv = info; |
| |
| #ifdef CONFIG_PARTITION_NEED_MTD |
| cfi_init_mtd(info); |
| #endif |
| devfs_create(&info->cdev); |
| |
| return 0; |
| } |
| |
| static struct driver_d cfi_driver = { |
| .name = "cfi_flash", |
| .probe = cfi_probe, |
| .info = cfi_info, |
| }; |
| |
| static int cfi_init(void) |
| { |
| return register_driver(&cfi_driver); |
| } |
| |
| device_initcall(cfi_init); |
| |