freebsd-skq/sys/dev/nand/nandbus.c

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/*-
* 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/kernel.h>
#include <sys/socket.h>
#include <sys/malloc.h>
#include <sys/module.h>
#include <sys/bus.h>
#include <sys/proc.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/condvar.h>
#include <dev/nand/nand.h>
#include <dev/nand/nandbus.h>
#include "nand_if.h"
#include "nandbus_if.h"
#include "nfc_if.h"
#define NAND_NCS 4
static int nandbus_probe(device_t dev);
static int nandbus_attach(device_t dev);
static int nandbus_detach(device_t dev);
static int nandbus_child_location_str(device_t, device_t, char *, size_t);
static int nandbus_child_pnpinfo_str(device_t, device_t, char *, size_t);
static int nandbus_get_status(device_t, uint8_t *);
static void nandbus_read_buffer(device_t, void *, uint32_t);
static int nandbus_select_cs(device_t, uint8_t);
static int nandbus_send_command(device_t, uint8_t);
static int nandbus_send_address(device_t, uint8_t);
static int nandbus_start_command(device_t);
static int nandbus_wait_ready(device_t, uint8_t *);
static void nandbus_write_buffer(device_t, void *, uint32_t);
static int nandbus_get_ecc(device_t, void *, uint32_t, void *, int *);
static int nandbus_correct_ecc(device_t, void *, int, void *, void *);
static void nandbus_lock(device_t);
static void nandbus_unlock(device_t);
static int nand_readid(device_t, uint8_t *, uint8_t *);
static int nand_probe_onfi(device_t, uint8_t *);
static int nand_reset(device_t);
struct nandbus_softc {
device_t dev;
struct cv nandbus_cv;
struct mtx nandbus_mtx;
uint8_t busy;
};
static device_method_t nandbus_methods[] = {
/* device interface */
DEVMETHOD(device_probe, nandbus_probe),
DEVMETHOD(device_attach, nandbus_attach),
DEVMETHOD(device_detach, nandbus_detach),
DEVMETHOD(device_shutdown, bus_generic_shutdown),
/* bus interface */
DEVMETHOD(bus_print_child, bus_generic_print_child),
DEVMETHOD(bus_driver_added, bus_generic_driver_added),
DEVMETHOD(bus_child_pnpinfo_str, nandbus_child_pnpinfo_str),
DEVMETHOD(bus_child_location_str, nandbus_child_location_str),
/* nandbus interface */
DEVMETHOD(nandbus_get_status, nandbus_get_status),
DEVMETHOD(nandbus_read_buffer, nandbus_read_buffer),
DEVMETHOD(nandbus_select_cs, nandbus_select_cs),
DEVMETHOD(nandbus_send_command, nandbus_send_command),
DEVMETHOD(nandbus_send_address, nandbus_send_address),
DEVMETHOD(nandbus_start_command,nandbus_start_command),
DEVMETHOD(nandbus_wait_ready, nandbus_wait_ready),
DEVMETHOD(nandbus_write_buffer, nandbus_write_buffer),
DEVMETHOD(nandbus_get_ecc, nandbus_get_ecc),
DEVMETHOD(nandbus_correct_ecc, nandbus_correct_ecc),
DEVMETHOD(nandbus_lock, nandbus_lock),
DEVMETHOD(nandbus_unlock, nandbus_unlock),
{ 0, 0 }
};
devclass_t nandbus_devclass;
driver_t nandbus_driver = {
"nandbus",
nandbus_methods,
sizeof(struct nandbus_softc)
};
DRIVER_MODULE(nandbus, nand, nandbus_driver, nandbus_devclass, 0, 0);
int
nandbus_create(device_t nfc)
{
device_t child;
child = device_add_child(nfc, "nandbus", -1);
if (!child)
return (ENODEV);
bus_generic_attach(nfc);
return(0);
}
void
nandbus_destroy(device_t nfc)
{
device_t *children;
int nchildren, i;
mtx_lock(&Giant);
/* Detach & delete all children */
if (!device_get_children(nfc, &children, &nchildren)) {
for (i = 0; i < nchildren; i++)
device_delete_child(nfc, children[i]);
free(children, M_TEMP);
}
mtx_unlock(&Giant);
}
static int
nandbus_probe(device_t dev)
{
device_set_desc(dev, "NAND bus");
return (0);
}
static int
nandbus_attach(device_t dev)
{
device_t child, nfc;
struct nand_id chip_id;
struct nandbus_softc *sc;
struct nandbus_ivar *ivar;
struct nand_softc *nfc_sc;
struct nand_params *chip_params;
uint8_t cs, onfi;
sc = device_get_softc(dev);
sc->dev = dev;
nfc = device_get_parent(dev);
nfc_sc = device_get_softc(nfc);
mtx_init(&sc->nandbus_mtx, "nandbus lock", NULL, MTX_DEF);
cv_init(&sc->nandbus_cv, "nandbus cv");
/* Check each possible CS for existing nand devices */
for (cs = 0; cs < NAND_NCS; cs++) {
nand_debug(NDBG_BUS,"probe chip select %x", cs);
/* Select & reset chip */
if (nandbus_select_cs(dev, cs))
break;
if (nand_reset(dev))
continue;
/* Read manufacturer and device id */
if (nand_readid(dev, &chip_id.man_id, &chip_id.dev_id))
continue;
if (chip_id.man_id == 0xff)
continue;
/*
* First try to get info from the table. If that fails, see if
* the chip can provide ONFI info. We check the table first to
* allow table entries to override info from chips that are
* known to provide bad ONFI data.
*/
onfi = 0;
chip_params = nand_get_params(&chip_id);
if (chip_params == NULL) {
nand_probe_onfi(dev, &onfi);
}
/*
* At this point it appears there is a chip at this chipselect,
* so if we can't work with it, whine about it.
*/
if (chip_params == NULL && onfi == 0) {
if (bootverbose || (nand_debug_flag & NDBG_BUS))
printf("Chip params not found, chipsel: %d "
"(manuf: 0x%0x, chipid: 0x%0x, onfi: %d)\n",
cs, chip_id.man_id, chip_id.dev_id, onfi);
continue;
}
ivar = malloc(sizeof(struct nandbus_ivar),
M_NAND, M_WAITOK);
if (onfi == 1) {
ivar->cs = cs;
ivar->cols = 0;
ivar->rows = 0;
ivar->params = NULL;
ivar->man_id = chip_id.man_id;
ivar->dev_id = chip_id.dev_id;
ivar->is_onfi = onfi;
ivar->chip_cdev_name = nfc_sc->chip_cdev_name;
child = device_add_child(dev, NULL, -1);
device_set_ivars(child, ivar);
continue;
}
ivar->cs = cs;
ivar->cols = 1;
ivar->rows = 2;
ivar->params = chip_params;
ivar->man_id = chip_id.man_id;
ivar->dev_id = chip_id.dev_id;
ivar->is_onfi = onfi;
ivar->chip_cdev_name = nfc_sc->chip_cdev_name;
/*
* Check what type of device we have.
* devices bigger than 32MiB have on more row (3)
*/
if (chip_params->chip_size > 32)
ivar->rows++;
/* Large page devices have one more col (2) */
if (chip_params->chip_size >= 128 &&
chip_params->page_size > 512)
ivar->cols++;
child = device_add_child(dev, NULL, -1);
device_set_ivars(child, ivar);
}
bus_generic_attach(dev);
return (0);
}
static int
nandbus_detach(device_t dev)
{
struct nandbus_softc *sc;
sc = device_get_softc(dev);
bus_generic_detach(dev);
mtx_destroy(&sc->nandbus_mtx);
cv_destroy(&sc->nandbus_cv);
return (0);
}
static int
nandbus_child_location_str(device_t bus, device_t child, char *buf,
size_t buflen)
{
struct nandbus_ivar *ivar = device_get_ivars(child);
snprintf(buf, buflen, "at cs#%d", ivar->cs);
return (0);
}
static int
nandbus_child_pnpinfo_str(device_t bus, device_t child, char *buf,
size_t buflen)
{
// XXX man id, model id ????
*buf = '\0';
return (0);
}
static int
nand_readid(device_t bus, uint8_t *man_id, uint8_t *dev_id)
{
device_t nfc;
if (!bus || !man_id || !dev_id)
return (EINVAL);
nand_debug(NDBG_BUS,"read id");
nfc = device_get_parent(bus);
if (NFC_SEND_COMMAND(nfc, NAND_CMD_READ_ID)) {
nand_debug(NDBG_BUS,"Error : could not send READ ID command");
return (ENXIO);
}
if (NFC_SEND_ADDRESS(nfc, 0)) {
nand_debug(NDBG_BUS,"Error : could not sent address to chip");
return (ENXIO);
}
if (NFC_START_COMMAND(nfc) != 0) {
nand_debug(NDBG_BUS,"Error : could not start command");
return (ENXIO);
}
DELAY(25);
*man_id = NFC_READ_BYTE(nfc);
*dev_id = NFC_READ_BYTE(nfc);
nand_debug(NDBG_BUS,"manufacturer id: %x chip id: %x", *man_id,
*dev_id);
return (0);
}
static int
nand_probe_onfi(device_t bus, uint8_t *onfi_compliant)
{
device_t nfc;
char onfi_id[] = {'O', 'N', 'F', 'I', '\0'};
int i;
nand_debug(NDBG_BUS,"probing ONFI");
nfc = device_get_parent(bus);
if (NFC_SEND_COMMAND(nfc, NAND_CMD_READ_ID)) {
nand_debug(NDBG_BUS,"Error : could not sent READ ID command");
return (ENXIO);
}
if (NFC_SEND_ADDRESS(nfc, ONFI_SIG_ADDR)) {
nand_debug(NDBG_BUS,"Error : could not sent address to chip");
return (ENXIO);
}
if (NFC_START_COMMAND(nfc) != 0) {
nand_debug(NDBG_BUS,"Error : could not start command");
return (ENXIO);
}
for (i = 0; onfi_id[i] != '\0'; i++)
if (NFC_READ_BYTE(nfc) != onfi_id[i]) {
nand_debug(NDBG_BUS,"ONFI non-compliant");
*onfi_compliant = 0;
return (0);
}
nand_debug(NDBG_BUS,"ONFI compliant");
*onfi_compliant = 1;
return (0);
}
static int
nand_reset(device_t bus)
{
device_t nfc;
nand_debug(NDBG_BUS,"resetting...");
nfc = device_get_parent(bus);
if (NFC_SEND_COMMAND(nfc, NAND_CMD_RESET) != 0) {
nand_debug(NDBG_BUS,"Error : could not sent RESET command");
return (ENXIO);
}
if (NFC_START_COMMAND(nfc) != 0) {
nand_debug(NDBG_BUS,"Error : could not start RESET command");
return (ENXIO);
}
DELAY(1000);
return (0);
}
void
nandbus_lock(device_t dev)
{
struct nandbus_softc *sc;
sc = device_get_softc(dev);
mtx_lock(&sc->nandbus_mtx);
if (sc->busy)
cv_wait(&sc->nandbus_cv, &sc->nandbus_mtx);
sc->busy = 1;
mtx_unlock(&sc->nandbus_mtx);
}
void
nandbus_unlock(device_t dev)
{
struct nandbus_softc *sc;
sc = device_get_softc(dev);
mtx_lock(&sc->nandbus_mtx);
sc->busy = 0;
cv_signal(&sc->nandbus_cv);
mtx_unlock(&sc->nandbus_mtx);
}
int
nandbus_select_cs(device_t dev, uint8_t cs)
{
return (NFC_SELECT_CS(device_get_parent(dev), cs));
}
int
nandbus_send_command(device_t dev, uint8_t command)
{
int err;
if ((err = NFC_SEND_COMMAND(device_get_parent(dev), command)))
nand_debug(NDBG_BUS,"Err: Could not send command %x, err %x",
command, err);
return (err);
}
int
nandbus_send_address(device_t dev, uint8_t address)
{
int err;
if ((err = NFC_SEND_ADDRESS(device_get_parent(dev), address)))
nand_debug(NDBG_BUS,"Err: Could not send address %x, err %x",
address, err);
return (err);
}
int
nandbus_start_command(device_t dev)
{
int err;
if ((err = NFC_START_COMMAND(device_get_parent(dev))))
nand_debug(NDBG_BUS,"Err: Could not start command, err %x",
err);
return (err);
}
void
nandbus_read_buffer(device_t dev, void *buf, uint32_t len)
{
NFC_READ_BUF(device_get_parent(dev), buf, len);
}
void
nandbus_write_buffer(device_t dev, void *buf, uint32_t len)
{
NFC_WRITE_BUF(device_get_parent(dev), buf, len);
}
int
nandbus_get_status(device_t dev, uint8_t *status)
{
int err;
if ((err = NANDBUS_SEND_COMMAND(dev, NAND_CMD_STATUS)))
return (err);
if ((err = NANDBUS_START_COMMAND(dev)))
return (err);
*status = NFC_READ_BYTE(device_get_parent(dev));
return (0);
}
int
nandbus_wait_ready(device_t dev, uint8_t *status)
{
struct timeval tv, tv2;
tv2.tv_sec = 0;
tv2.tv_usec = 50 * 5000; /* 250ms */
getmicrotime(&tv);
timevaladd(&tv, &tv2);
do {
if (NANDBUS_GET_STATUS(dev, status))
return (ENXIO);
if (*status & NAND_STATUS_RDY)
return (0);
getmicrotime(&tv2);
} while (timevalcmp(&tv2, &tv, <=));
return (EBUSY);
}
int
nandbus_get_ecc(device_t dev, void *buf, uint32_t pagesize, void *ecc,
int *needwrite)
{
return (NFC_GET_ECC(device_get_parent(dev), buf, pagesize, ecc, needwrite));
}
int
nandbus_correct_ecc(device_t dev, void *buf, int pagesize, void *readecc,
void *calcecc)
{
return (NFC_CORRECT_ECC(device_get_parent(dev), buf, pagesize,
readecc, calcecc));
}