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freebsd-dev/sys/dev/nand/nand_cdev.c
Pedro F. Giffuni 718cf2ccb9 sys/dev: further adoption of SPDX licensing ID tags. 
Mainly focus on files that use BSD 2-Clause license, however the tool I
was using misidentified many licenses so this was mostly a manual - error
prone - task.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.
2017-11-27 14:52:40 +00:00

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/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (C) 2009-2012 Semihalf
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/conf.h>
#include <sys/bus.h>
#include <sys/malloc.h>
#include <sys/uio.h>
#include <sys/bio.h>
#include <dev/nand/nand.h>
#include <dev/nand/nandbus.h>
#include <dev/nand/nand_dev.h>
#include "nand_if.h"
#include "nandbus_if.h"
static int nand_page_stat(struct nand_chip *, struct page_stat_io *);
static int nand_block_stat(struct nand_chip *, struct block_stat_io *);
static d_ioctl_t nand_ioctl;
static d_open_t nand_open;
static d_strategy_t nand_strategy;
static struct cdevsw nand_cdevsw = {
.d_version = D_VERSION,
.d_name = "nand",
.d_open = nand_open,
.d_read = physread,
.d_write = physwrite,
.d_ioctl = nand_ioctl,
.d_strategy = nand_strategy,
};
static int
offset_to_page(struct chip_geom *cg, uint32_t offset)
{
return (offset / cg->page_size);
}
static int
offset_to_page_off(struct chip_geom *cg, uint32_t offset)
{
return (offset % cg->page_size);
}
int
nand_make_dev(struct nand_chip *chip)
{
struct nandbus_ivar *ivar;
device_t parent, nandbus;
int parent_unit, unit;
char *name;
ivar = device_get_ivars(chip->dev);
nandbus = device_get_parent(chip->dev);
if (ivar->chip_cdev_name) {
name = ivar->chip_cdev_name;
/*
* If we got distinct name for chip device we can enumarete it
* based on contoller number.
*/
parent = device_get_parent(nandbus);
} else {
name = "nand";
parent = nandbus;
}
parent_unit = device_get_unit(parent);
unit = parent_unit * 4 + chip->num;
chip->cdev = make_dev(&nand_cdevsw, unit, UID_ROOT, GID_WHEEL,
0666, "%s%d.%d", name, parent_unit, chip->num);
if (chip->cdev == NULL)
return (ENXIO);
if (bootverbose)
device_printf(chip->dev, "Created cdev %s%d.%d for chip "
"[0x%0x, 0x%0x]\n", name, parent_unit, chip->num,
ivar->man_id, ivar->dev_id);
chip->cdev->si_drv1 = chip;
return (0);
}
void
nand_destroy_dev(struct nand_chip *chip)
{
if (chip->cdev)
destroy_dev(chip->cdev);
}
static int
nand_open(struct cdev *dev, int oflags, int devtype, struct thread *td)
{
return (0);
}
static int
nand_read(struct nand_chip *chip, uint32_t offset, void *buf, uint32_t len)
{
struct chip_geom *cg;
device_t nandbus;
int start_page, count, off, err = 0;
uint8_t *ptr, *tmp;
nand_debug(NDBG_CDEV, "Read from chip%d [%p] at %d\n", chip->num,
chip, offset);
nandbus = device_get_parent(chip->dev);
NANDBUS_LOCK(nandbus);
NANDBUS_SELECT_CS(device_get_parent(chip->dev), chip->num);
cg = &chip->chip_geom;
start_page = offset_to_page(cg, offset);
off = offset_to_page_off(cg, offset);
count = (len > cg->page_size - off) ? cg->page_size - off : len;
ptr = (uint8_t *)buf;
while (len > 0) {
if (len < cg->page_size) {
tmp = malloc(cg->page_size, M_NAND, M_WAITOK);
if (!tmp) {
err = ENOMEM;
break;
}
err = NAND_READ_PAGE(chip->dev, start_page,
tmp, cg->page_size, 0);
if (err) {
free(tmp, M_NAND);
break;
}
bcopy(tmp + off, ptr, count);
free(tmp, M_NAND);
} else {
err = NAND_READ_PAGE(chip->dev, start_page,
ptr, cg->page_size, 0);
if (err)
break;
}
len -= count;
start_page++;
ptr += count;
count = (len > cg->page_size) ? cg->page_size : len;
off = 0;
}
NANDBUS_UNLOCK(nandbus);
return (err);
}
static int
nand_write(struct nand_chip *chip, uint32_t offset, void* buf, uint32_t len)
{
struct chip_geom *cg;
device_t nandbus;
int off, start_page, err = 0;
uint8_t *ptr;
nand_debug(NDBG_CDEV, "Write to chip %d [%p] at %d\n", chip->num,
chip, offset);
nandbus = device_get_parent(chip->dev);
NANDBUS_LOCK(nandbus);
NANDBUS_SELECT_CS(device_get_parent(chip->dev), chip->num);
cg = &chip->chip_geom;
start_page = offset_to_page(cg, offset);
off = offset_to_page_off(cg, offset);
if (off != 0 || (len % cg->page_size) != 0) {
printf("Not aligned write start [0x%08x] size [0x%08x]\n",
off, len);
NANDBUS_UNLOCK(nandbus);
return (EINVAL);
}
ptr = (uint8_t *)buf;
while (len > 0) {
err = NAND_PROGRAM_PAGE(chip->dev, start_page, ptr,
cg->page_size, 0);
if (err)
break;
len -= cg->page_size;
start_page++;
ptr += cg->page_size;
}
NANDBUS_UNLOCK(nandbus);
return (err);
}
static void
nand_strategy(struct bio *bp)
{
struct nand_chip *chip;
struct cdev *dev;
int err = 0;
dev = bp->bio_dev;
chip = dev->si_drv1;
nand_debug(NDBG_CDEV, "Strategy %s on chip %d [%p]\n",
bp->bio_cmd == BIO_READ ? "READ" : "WRITE",
chip->num, chip);
if (bp->bio_cmd == BIO_READ) {
err = nand_read(chip,
bp->bio_offset & 0xffffffff,
bp->bio_data, bp->bio_bcount);
} else {
err = nand_write(chip,
bp->bio_offset & 0xffffffff,
bp->bio_data, bp->bio_bcount);
}
if (err == 0)
bp->bio_resid = 0;
else {
bp->bio_error = EIO;
bp->bio_flags |= BIO_ERROR;
bp->bio_resid = bp->bio_bcount;
}
biodone(bp);
}
static int
nand_oob_access(struct nand_chip *chip, uint32_t page, uint32_t offset,
uint32_t len, uint8_t *data, uint8_t write)
{
struct chip_geom *cg;
uint8_t *buf = NULL;
int ret = 0;
cg = &chip->chip_geom;
buf = malloc(cg->oob_size, M_NAND, M_WAITOK);
if (!buf)
return (ENOMEM);
memset(buf, 0xff, cg->oob_size);
if (!write) {
ret = nand_read_oob(chip, page, buf, cg->oob_size);
copyout(buf, data, len);
} else {
copyin(data, buf, len);
ret = nand_prog_oob(chip, page, buf, cg->oob_size);
}
free(buf, M_NAND);
return (ret);
}
static int
nand_ioctl(struct cdev *dev, u_long cmd, caddr_t data, int fflag,
struct thread *td)
{
struct nand_chip *chip;
struct chip_geom *cg;
struct nand_oob_rw *oob_rw = NULL;
struct nand_raw_rw *raw_rw = NULL;
device_t nandbus;
size_t bufsize = 0, len = 0;
size_t raw_size;
off_t off;
uint8_t *buf = NULL;
int ret = 0;
uint8_t status;
chip = (struct nand_chip *)dev->si_drv1;
cg = &chip->chip_geom;
nandbus = device_get_parent(chip->dev);
if ((cmd == NAND_IO_RAW_READ) || (cmd == NAND_IO_RAW_PROG)) {
raw_rw = (struct nand_raw_rw *)data;
raw_size = cg->pgs_per_blk * (cg->page_size + cg->oob_size);
/* Check if len is not bigger than chip size */
if (raw_rw->len > raw_size)
return (EFBIG);
/*
* Do not ask for too much memory, in case of large transfers
* read/write in 16-pages chunks
*/
bufsize = 16 * (cg->page_size + cg->oob_size);
if (raw_rw->len < bufsize)
bufsize = raw_rw->len;
buf = malloc(bufsize, M_NAND, M_WAITOK);
len = raw_rw->len;
off = 0;
}
switch(cmd) {
case NAND_IO_ERASE:
ret = nand_erase_blocks(chip, ((off_t *)data)[0],
((off_t *)data)[1]);
break;
case NAND_IO_OOB_READ:
oob_rw = (struct nand_oob_rw *)data;
ret = nand_oob_access(chip, oob_rw->page, 0,
oob_rw->len, oob_rw->data, 0);
break;
case NAND_IO_OOB_PROG:
oob_rw = (struct nand_oob_rw *)data;
ret = nand_oob_access(chip, oob_rw->page, 0,
oob_rw->len, oob_rw->data, 1);
break;
case NAND_IO_GET_STATUS:
NANDBUS_LOCK(nandbus);
ret = NANDBUS_GET_STATUS(nandbus, &status);
if (ret == 0)
*(uint8_t *)data = status;
NANDBUS_UNLOCK(nandbus);
break;
case NAND_IO_RAW_PROG:
while (len > 0) {
if (len < bufsize)
bufsize = len;
ret = copyin(raw_rw->data + off, buf, bufsize);
if (ret)
break;
ret = nand_prog_pages_raw(chip, raw_rw->off + off, buf,
bufsize);
if (ret)
break;
len -= bufsize;
off += bufsize;
}
break;
case NAND_IO_RAW_READ:
while (len > 0) {
if (len < bufsize)
bufsize = len;
ret = nand_read_pages_raw(chip, raw_rw->off + off, buf,
bufsize);
if (ret)
break;
ret = copyout(buf, raw_rw->data + off, bufsize);
if (ret)
break;
len -= bufsize;
off += bufsize;
}
break;
case NAND_IO_PAGE_STAT:
ret = nand_page_stat(chip, (struct page_stat_io *)data);
break;
case NAND_IO_BLOCK_STAT:
ret = nand_block_stat(chip, (struct block_stat_io *)data);
break;
case NAND_IO_GET_CHIP_PARAM:
nand_get_chip_param(chip, (struct chip_param_io *)data);
break;
default:
printf("Unknown nand_ioctl request \n");
ret = EIO;
}
if (buf)
free(buf, M_NAND);
return (ret);
}
static int
nand_page_stat(struct nand_chip *chip, struct page_stat_io *page_stat)
{
struct chip_geom *cg;
struct page_stat *stat;
int num_pages;
cg = &chip->chip_geom;
num_pages = cg->pgs_per_blk * cg->blks_per_lun * cg->luns;
if (page_stat->page_num >= num_pages)
return (EINVAL);
stat = &chip->pg_stat[page_stat->page_num];
page_stat->page_read = stat->page_read;
page_stat->page_written = stat->page_written;
page_stat->page_raw_read = stat->page_raw_read;
page_stat->page_raw_written = stat->page_raw_written;
page_stat->ecc_succeded = stat->ecc_stat.ecc_succeded;
page_stat->ecc_corrected = stat->ecc_stat.ecc_corrected;
page_stat->ecc_failed = stat->ecc_stat.ecc_failed;
return (0);
}
static int
nand_block_stat(struct nand_chip *chip, struct block_stat_io *block_stat)
{
struct chip_geom *cg;
uint32_t block_num = block_stat->block_num;
cg = &chip->chip_geom;
if (block_num >= cg->blks_per_lun * cg->luns)
return (EINVAL);
block_stat->block_erased = chip->blk_stat[block_num].block_erased;
return (0);
}
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