freebsd-skq/sys/dev/nand/nand_cdev.c
2015-12-18 05:55:24 +00:00

453 lines
10 KiB
C

/*-
* 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);
}