/*
* (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>
*
* 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.
*
*
*/
/* 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 <io.h>
#include <errno.h>
#include <progress.h>
#include <linux/err.h>
#include <asm/unaligned.h>
#include <linux/mtd/concat.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 unsigned int 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
struct cfi_priv {
struct flash_info *infos;
int num_devs;
struct mtd_info **mtds;
};
/*
* Functions
*/
static void flash_add_byte(struct flash_info *info, cfiword_t *cword, u8 c)
{
if (bankwidth_is_1(info)) {
*cword = c;
return;
}
#ifdef __BIG_ENDIAN
*cword = (*cword << 8) | c;
#elif defined __LITTLE_ENDIAN
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;
#else
#error "could not determine byte order"
#endif
}
static int flash_write_cfiword(struct flash_info *info, unsigned long 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 -EIO;
if (!flag)
return -EIO;
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
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
*/
u8 flash_read_uchar(struct flash_info *info, unsigned int offset)
{
u8 *cp = flash_make_addr(info, 0, offset);
#if defined __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 unsigned long flash_read_long(struct flash_info *info, flash_sect_t sect,
unsigned int offset)
{
u8 *addr;
unsigned long retval;
int x;
addr = flash_make_addr (info, sect, offset);
dev_dbg(info->dev, "long addr is at %p info->portwidth = %d\n", addr,
info->portwidth);
for (x = 0; x < 4 * info->portwidth; x++)
dev_dbg(info->dev, "addr[%x] = 0x%x\n", x, flash_read8(addr + x));
#if defined __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;
u8 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_width(struct flash_info *info, struct cfi_qry *qry)
{
int cfi_offset;
int pw, cw;
for (pw = CFG_FLASH_CFI_WIDTH; pw <= FLASH_CFI_64BIT; pw <<= 1) {
for (cw = FLASH_CFI_BY8; cw <= pw; cw <<= 1) {
info->chipwidth = cw;
info->portwidth = pw;
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(unsigned int);
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'))
goto found;
}
}
}
dev_dbg(info->dev, "no flash found\n");
return -ENODEV;
found:
flash_read_cfi(info, qry, FLASH_OFFSET_CFI_RESP,
sizeof(struct cfi_qry));
info->interface = get_unaligned_le16(&qry->interface_desc);
info->cfi_offset = flash_offset_cfi[cfi_offset];
dev_dbg(info->dev, "device interface is %d\n", info->interface);
dev_dbg(info->dev, "found port %d chip %d chip_lsb %d ",
info->portwidth, info->chipwidth, info->chip_lsb);
dev_dbg(info->dev, "port %d bits chip %d bits\n",
info->portwidth << CFI_FLASH_SHIFT_WIDTH,
info->chipwidth << CFI_FLASH_SHIFT_WIDTH);
return 0;
}
static int flash_detect_cfi(struct flash_info *info, struct cfi_qry *qry)
{
int ret;
dev_dbg(info->dev, "flash detect cfi\n");
info->chip_lsb = 0;
ret = flash_detect_width (info, qry);
if (!ret)
return 0;
info->chip_lsb = 1;
return flash_detect_width (info, qry);
}
/*
* The following code cannot be run from FLASH!
*/
static int flash_detect_size(struct flash_info *info)
{
int i, j, ret;
flash_sect_t sect_cnt;
unsigned long sector;
unsigned long tmp;
int size_ratio;
int num_erase_regions;
int erase_region_size;
int erase_region_count;
int cur_offset = 0;
struct cfi_qry qry = {};
unsigned long base = (unsigned long)info->base;
info->ext_addr = 0;
info->cfi_version = 0;
/* first only malloc space for the first sector */
info->start = xmalloc(sizeof(*info->eraseregions));
info->start[0] = base;
info->protect = 0;
ret = flash_detect_cfi(info, &qry);
if (ret)
return ret;
info->vendor = get_unaligned_le16(&qry.p_id);
info->ext_addr = get_unaligned_le16(&qry.p_adr);
num_erase_regions = qry.num_erase_regions;
if (info->ext_addr) {
info->cfi_version = (u16)flash_read_uchar (info,
info->ext_addr + 3) << 8;
info->cfi_version |= (u16)flash_read_uchar (info,
info->ext_addr + 4);
}
#ifdef DEBUG
flash_printqry(&qry);
#endif
switch (info->vendor) {
case CFI_CMDSET_INTEL_EXTENDED:
case CFI_CMDSET_INTEL_STANDARD:
if (IS_ENABLED(CONFIG_DRIVER_CFI_INTEL))
info->cfi_cmd_set = &cfi_cmd_set_intel;
break;
case CFI_CMDSET_AMD_STANDARD:
case CFI_CMDSET_AMD_EXTENDED:
if (IS_ENABLED(CONFIG_DRIVER_CFI_AMD))
info->cfi_cmd_set = &cfi_cmd_set_amd;
break;
}
if (!info->cfi_cmd_set) {
dev_err(info->dev, "unsupported vendor 0x%04x\n", info->vendor);
return -ENOSYS;
}
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);
dev_dbg(info->dev, "manufacturer is %d\n", info->vendor);
dev_dbg(info->dev, "manufacturer id is 0x%x\n", info->manufacturer_id);
dev_dbg(info->dev, "device id is 0x%x\n", info->device_id);
dev_dbg(info->dev, "device id2 is 0x%x\n", info->device_id2);
dev_dbg(info->dev, "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)) {
size_ratio >>= 1;
}
dev_dbg(info->dev, "size_ratio %d port %d bits chip %d bits\n",
size_ratio, info->portwidth << CFI_FLASH_SHIFT_WIDTH,
info->chipwidth << CFI_FLASH_SHIFT_WIDTH);
dev_dbg(info->dev, "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) {
dev_info(info->dev, "%d erase regions found, only %d used\n",
num_erase_regions, NUM_ERASE_REGIONS);
break;
}
tmp = get_unaligned_le32(&qry.erase_region_info[i]);
dev_dbg(info->dev, "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;
dev_dbg(info->dev, "erase_region_count = %d erase_region_size = %d\n",
erase_region_count, erase_region_size);
region->offset = cur_offset;
region->erasesize = erase_region_size * size_ratio;
region->numblocks = erase_region_count;
cur_offset += erase_region_size * size_ratio * erase_region_count;
/* increase the space malloced for the sector start addresses */
info->start = xrealloc(info->start, sizeof(*info->eraseregions) *
(erase_region_count + sect_cnt));
info->protect = xrealloc(info->protect, sizeof(*info->eraseregions) *
(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 << get_unaligned_le16(&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 0;
}
/* 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, unsigned long 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 flash_info *finfo, size_t count, loff_t offset)
{
unsigned long start, end;
int i, ret = 0;
dev_dbg(finfo->dev, "%s: erase 0x%08llx (size %zu)\n", __func__, offset, count);
start = find_sector(finfo, (unsigned long)finfo->base + offset);
end = find_sector(finfo, (unsigned long)finfo->base + offset +
count - 1);
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;
}
}
out:
return ret;
}
static int write_buff(struct flash_info *info, const u8 *src,
unsigned long addr, unsigned long cnt)
{
unsigned long wp;
u8 *p;
int aln;
cfiword_t cword;
int i, ret;
#ifdef CONFIG_CFI_BUFFER_WRITE
int buffered_size;
#endif
/* get lower aligned address */
wp = addr & ~((unsigned long)info->portwidth - 1);
/* handle unaligned start */
aln = addr - wp;
if (aln) {
cword = 0;
p = (u8 *)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));
ret = flash_write_cfiword(info, wp, cword);
if (ret)
return ret;
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++);
ret = flash_write_cfiword(info, wp, cword);
if (ret)
return ret;
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;
ret = info->cfi_cmd_set->flash_write_cfibuffer(info, wp, src, i);
if (ret)
return ret;
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++);
ret = flash_write_cfiword(info, wp, cword);
if (ret)
return ret;
wp += info->portwidth;
cnt -= info->portwidth;
}
#endif /* CONFIG_CFI_BUFFER_WRITE */
if (cnt == 0)
return 0;
/*
* handle unaligned tail bytes
*/
cword = 0;
p = (u8 *)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 ret;
ret = info->cfi_cmd_set->flash_real_protect(info, sector, prot);
if (ret)
return ret;
ret = flash_status_check(info, sector, info->erase_blk_tout,
prot ? "protect" : "unprotect");
if (ret)
return ret;
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 0;
}
static int cfi_mtd_protect(struct flash_info *finfo, loff_t offset, size_t len, int prot)
{
unsigned long start, end;
int i, ret = 0;
start = find_sector(finfo, (unsigned long)finfo->base + offset);
end = find_sector(finfo, (unsigned long)finfo->base + offset + len - 1);
for (i = start; i <= end; i++) {
ret = flash_real_protect(finfo, i, prot);
if (ret)
return ret;
}
return 0;
}
static int cfi_mtd_lock(struct mtd_info *mtd, loff_t offset, size_t len)
{
struct flash_info *finfo = container_of(mtd, struct flash_info, mtd);
return cfi_mtd_protect(finfo, offset, len, 1);
}
static int cfi_mtd_unlock(struct mtd_info *mtd, loff_t offset, size_t len)
{
struct flash_info *finfo = container_of(mtd, struct flash_info, mtd);
return cfi_mtd_protect(finfo, offset, len, 0);
}
static void cfi_info_one(struct flash_info *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);
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);
}
printf("\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;
}
static void cfi_info(struct device_d *dev)
{
struct cfi_priv *priv = dev->priv;
int i;
for (i = 0; i < priv->num_devs; i++)
cfi_info_one(&priv->infos[i]);
}
int flash_status_check(struct flash_info *info, flash_sect_t sector,
u64 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,
u64 tout, char *prompt)
{
u64 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)) {
dev_err(info->dev, "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 -ETIMEDOUT;
}
udelay(1); /* also triggers watchdog */
}
return 0;
}
/*
* make a proper sized command based on the port and chip widths
*/
void flash_make_cmd(struct flash_info *info, u32 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,
unsigned int offset, u32 cmd)
{
u8 *addr;
cfiword_t cword;
addr = flash_make_addr (info, sect, offset);
flash_make_cmd (info, cmd, &cword);
dev_vdbg(info->dev, "%s: %p %lX %X => %p " CFI_WORD_FMT "\n", __func__,
info, sect, offset, addr, cword);
flash_write_word(info, cword, addr);
}
int flash_isequal(struct flash_info *info, flash_sect_t sect,
unsigned int offset, u32 cmd)
{
void *addr;
cfiword_t cword;
int retval;
addr = flash_make_addr (info, sect, offset);
flash_make_cmd (info, cmd, &cword);
dev_vdbg(info->dev, "is= cmd %x(%c) addr %p ", cmd, cmd, addr);
if (bankwidth_is_1(info)) {
dev_vdbg(info->dev, "is= %x %x\n", flash_read8(addr), (u8)cword);
retval = (flash_read8(addr) == cword);
} else if (bankwidth_is_2(info)) {
dev_vdbg(info->dev, "is= %4.4x %4.4x\n", flash_read16(addr), (u16)cword);
retval = (flash_read16(addr) == cword);
} else if (bankwidth_is_4(info)) {
dev_vdbg(info->dev, "is= %8.8x %8.8x\n", flash_read32(addr), (u32)cword);
retval = (flash_read32(addr) == cword);
} else if (bankwidth_is_8(info)) {
dev_vdbg(info->dev, "is= %16.16llx %16.16llx\n", flash_read64(addr), (u64)cword);
retval = (flash_read64(addr) == cword);
} else {
retval = 0;
}
return retval;
}
int flash_isset(struct flash_info *info, flash_sect_t sect,
unsigned int offset, u32 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;
}
static int cfi_mtd_read(struct mtd_info *mtd, loff_t from, size_t len,
size_t *retlen, u8 *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 u8 *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);
int ret;
ret = cfi_erase(info, instr->len, instr->addr);
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;
u32 erasesize;
int i;
mtd->read = cfi_mtd_read;
mtd->write = cfi_mtd_write;
mtd->erase = cfi_mtd_erase;
mtd->lock = cfi_mtd_lock;
mtd->unlock = cfi_mtd_unlock;
mtd->size = info->size;
erasesize = 0;
for (i = 0; i < info->numeraseregions; i++) {
if (erasesize < info->eraseregions[i].erasesize)
erasesize = info->eraseregions[i].erasesize;
}
mtd->erasesize = erasesize;
mtd->writesize = 1;
mtd->writebufsize = info->buffer_size;
mtd->subpage_sft = 0;
mtd->eraseregions = info->eraseregions;
mtd->numeraseregions = info->numeraseregions;
mtd->flags = MTD_CAP_NORFLASH;
mtd->type = MTD_NORFLASH;
mtd->parent = info->dev;
}
static int cfi_probe_one(struct flash_info *info, int num)
{
struct resource *iores;
int ret;
info->flash_id = FLASH_UNKNOWN;
info->cmd_reset = FLASH_CMD_RESET;
iores = dev_request_mem_resource(info->dev, num);
if (IS_ERR(iores))
return PTR_ERR(iores);
info->base = IOMEM(iores->start);
ret = flash_detect_size(info);
if (ret) {
dev_warn(info->dev, "## Unknown FLASH on Bank at 0x%p - Size = 0x%08lx = %ld MB\n",
info->base, info->size, info->size << 20);
return -ENODEV;
}
dev_info(info->dev, "found cfi flash at 0x%p, size %s\n",
info->base, size_human_readable(info->size));
cfi_init_mtd(info);
return 0;
}
static int cfi_probe(struct device_d *dev)
{
struct cfi_priv *priv;
int i, ret;
struct mtd_info *mtd;
const char *mtd_name = NULL;
priv = xzalloc(sizeof(*priv));
priv->num_devs = dev->num_resources;
priv->infos = xzalloc(sizeof(*priv->infos) * priv->num_devs);
priv->mtds = xzalloc(sizeof(*priv->mtds) * priv->num_devs);
of_property_read_string(dev->device_node, "linux,mtd-name", &mtd_name);
if (!mtd_name)
mtd_name = dev_name(dev);
dev->priv = priv;
for (i = 0; i < priv->num_devs; i++) {
struct flash_info *info = &priv->infos[i];
info->dev = dev;
info->mtd.name = xstrdup(mtd_name);
ret = cfi_probe_one(info, i);
if (ret)
return ret;
priv->mtds[i] = &priv->infos[i].mtd;
}
dev->info = cfi_info;
if (priv->num_devs > 1 && IS_ENABLED(CONFIG_MTD_CONCAT)) {
mtd = mtd_concat_create(priv->mtds, priv->num_devs, "nor");
if (!mtd) {
dev_err(dev, "failed to create concat mtd device\n");
return -ENODEV;
}
} else {
if (priv->num_devs > 1)
dev_warn(dev, "mtd concat disabled. using first chip only\n");
mtd = &priv->infos[0].mtd;
}
mtd->parent = dev;
ret = add_mtd_device(mtd, "nor", DEVICE_ID_DYNAMIC);
if (ret)
return ret;
return 0;
}
static __maybe_unused struct of_device_id cfi_dt_ids[] = {
{
.compatible = "cfi-flash",
}, {
/* sentinel */
}
};
static struct driver_d cfi_driver = {
.name = "cfi_flash",
.probe = cfi_probe,
.of_compatible = DRV_OF_COMPAT(cfi_dt_ids),
};
device_platform_driver(cfi_driver);
