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d3248c4170
freebsd-dev/sys/dev/flash/mx25l.c
Ian Lepore d3248c4170 Resolve a name conflict when both SpiFlash and DataFlash devices are present. 
Both SpiFlash (mx25l) and DataFlash (at45d) drivers create a disk device
with a name of /dev/flash/spiN where N is the driver's unit number.  If
both types of devices are present in the same system, this creates a fatal
conflict that prevents attachment of whichever device attaches second
(because mx25l0 and at45d0 both try to create a spi0).

This gives each type of device a unique name (mx25lN or at45dN respectively)
and also adds an alias of spiN for compatibility.  When both device types
appear in the same system, only the first to attach gets the spiN alias.
When the second device attaches there is a non-fatal warning that the alias
can't be created, but both devices are still accessible via their primary
names (and there is no need for the spiN name to work for backwards
compatibility on such a system, because it has never been possible to use
the spiN names when both devices exist).
2019-02-25 17:30:01 +00:00

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/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2006 M. Warner Losh.
* Copyright (c) 2009 Oleksandr Tymoshenko. All rights reserved.
* Copyright (c) 2018 Ian Lepore. 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 ``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 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 "opt_platform.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bio.h>
#include <sys/bus.h>
#include <sys/conf.h>
#include <sys/kernel.h>
#include <sys/kthread.h>
#include <sys/lock.h>
#include <sys/mbuf.h>
#include <sys/malloc.h>
#include <sys/module.h>
#include <sys/mutex.h>
#include <geom/geom_disk.h>
#ifdef FDT
#include <dev/fdt/fdt_common.h>
#include <dev/ofw/ofw_bus_subr.h>
#include <dev/ofw/openfirm.h>
#endif
#include <dev/spibus/spi.h>
#include "spibus_if.h"
#include <dev/flash/mx25lreg.h>
#define FL_NONE 0x00
#define FL_ERASE_4K 0x01
#define FL_ERASE_32K 0x02
#define FL_ENABLE_4B_ADDR 0x04
#define FL_DISABLE_4B_ADDR 0x08
/*
* Define the sectorsize to be a smaller size rather than the flash
* sector size. Trying to run FFS off of a 64k flash sector size
* results in a completely un-usable system.
*/
#define MX25L_SECTORSIZE 512
struct mx25l_flash_ident
{
const char *name;
uint8_t manufacturer_id;
uint16_t device_id;
unsigned int sectorsize;
unsigned int sectorcount;
unsigned int flags;
};
struct mx25l_softc
{
device_t sc_dev;
device_t sc_parent;
uint8_t sc_manufacturer_id;
uint16_t sc_device_id;
unsigned int sc_erasesize;
struct mtx sc_mtx;
struct disk *sc_disk;
struct proc *sc_p;
struct bio_queue_head sc_bio_queue;
unsigned int sc_flags;
unsigned int sc_taskstate;
uint8_t sc_dummybuf[FLASH_PAGE_SIZE];
};
#define TSTATE_STOPPED 0
#define TSTATE_STOPPING 1
#define TSTATE_RUNNING 2
#define M25PXX_LOCK(_sc) mtx_lock(&(_sc)->sc_mtx)
#define M25PXX_UNLOCK(_sc) mtx_unlock(&(_sc)->sc_mtx)
#define M25PXX_LOCK_INIT(_sc) \
mtx_init(&_sc->sc_mtx, device_get_nameunit(_sc->sc_dev), \
"mx25l", MTX_DEF)
#define M25PXX_LOCK_DESTROY(_sc) mtx_destroy(&_sc->sc_mtx);
#define M25PXX_ASSERT_LOCKED(_sc) mtx_assert(&_sc->sc_mtx, MA_OWNED);
#define M25PXX_ASSERT_UNLOCKED(_sc) mtx_assert(&_sc->sc_mtx, MA_NOTOWNED);
/* disk routines */
static int mx25l_open(struct disk *dp);
static int mx25l_close(struct disk *dp);
static int mx25l_ioctl(struct disk *, u_long, void *, int, struct thread *);
static void mx25l_strategy(struct bio *bp);
static int mx25l_getattr(struct bio *bp);
static void mx25l_task(void *arg);
static struct mx25l_flash_ident flash_devices[] = {
{ "en25f32", 0x1c, 0x3116, 64 * 1024, 64, FL_NONE },
{ "en25p32", 0x1c, 0x2016, 64 * 1024, 64, FL_NONE },
{ "en25p64", 0x1c, 0x2017, 64 * 1024, 128, FL_NONE },
{ "en25q32", 0x1c, 0x3016, 64 * 1024, 64, FL_NONE },
{ "en25q64", 0x1c, 0x3017, 64 * 1024, 128, FL_ERASE_4K },
{ "m25p32", 0x20, 0x2016, 64 * 1024, 64, FL_NONE },
{ "m25p64", 0x20, 0x2017, 64 * 1024, 128, FL_NONE },
{ "mx25l1606e", 0xc2, 0x2015, 64 * 1024, 32, FL_ERASE_4K},
{ "mx25ll32", 0xc2, 0x2016, 64 * 1024, 64, FL_NONE },
{ "mx25ll64", 0xc2, 0x2017, 64 * 1024, 128, FL_NONE },
{ "mx25ll128", 0xc2, 0x2018, 64 * 1024, 256, FL_ERASE_4K | FL_ERASE_32K },
{ "mx25ll256", 0xc2, 0x2019, 64 * 1024, 512, FL_ERASE_4K | FL_ERASE_32K | FL_ENABLE_4B_ADDR },
{ "s25fl032", 0x01, 0x0215, 64 * 1024, 64, FL_NONE },
{ "s25fl064", 0x01, 0x0216, 64 * 1024, 128, FL_NONE },
{ "s25fl128", 0x01, 0x2018, 64 * 1024, 256, FL_NONE },
{ "s25fl256s", 0x01, 0x0219, 64 * 1024, 512, FL_NONE },
{ "SST25VF010A", 0xbf, 0x2549, 4 * 1024, 32, FL_ERASE_4K | FL_ERASE_32K },
{ "SST25VF032B", 0xbf, 0x254a, 64 * 1024, 64, FL_ERASE_4K | FL_ERASE_32K },
/* Winbond -- w25x "blocks" are 64K, "sectors" are 4KiB */
{ "w25x32", 0xef, 0x3016, 64 * 1024, 64, FL_ERASE_4K },
{ "w25x64", 0xef, 0x3017, 64 * 1024, 128, FL_ERASE_4K },
{ "w25q32", 0xef, 0x4016, 64 * 1024, 64, FL_ERASE_4K },
{ "w25q64", 0xef, 0x4017, 64 * 1024, 128, FL_ERASE_4K },
{ "w25q64bv", 0xef, 0x4017, 64 * 1024, 128, FL_ERASE_4K },
{ "w25q128", 0xef, 0x4018, 64 * 1024, 256, FL_ERASE_4K },
{ "w25q256", 0xef, 0x4019, 64 * 1024, 512, FL_ERASE_4K },
/* Atmel */
{ "at25df641", 0x1f, 0x4800, 64 * 1024, 128, FL_ERASE_4K },
/* GigaDevice */
{ "gd25q64", 0xc8, 0x4017, 64 * 1024, 128, FL_ERASE_4K },
};
static int
mx25l_wait_for_device_ready(struct mx25l_softc *sc)
{
uint8_t txBuf[2], rxBuf[2];
struct spi_command cmd;
int err;
memset(&cmd, 0, sizeof(cmd));
do {
txBuf[0] = CMD_READ_STATUS;
cmd.tx_cmd = txBuf;
cmd.rx_cmd = rxBuf;
cmd.rx_cmd_sz = 2;
cmd.tx_cmd_sz = 2;
err = SPIBUS_TRANSFER(sc->sc_parent, sc->sc_dev, &cmd);
} while (err == 0 && (rxBuf[1] & STATUS_WIP));
return (err);
}
static struct mx25l_flash_ident*
mx25l_get_device_ident(struct mx25l_softc *sc)
{
uint8_t txBuf[8], rxBuf[8];
struct spi_command cmd;
uint8_t manufacturer_id;
uint16_t dev_id;
int err, i;
memset(&cmd, 0, sizeof(cmd));
memset(txBuf, 0, sizeof(txBuf));
memset(rxBuf, 0, sizeof(rxBuf));
txBuf[0] = CMD_READ_IDENT;
cmd.tx_cmd = &txBuf;
cmd.rx_cmd = &rxBuf;
/*
* Some compatible devices has extended two-bytes ID
* We'll use only manufacturer/deviceid atm
*/
cmd.tx_cmd_sz = 4;
cmd.rx_cmd_sz = 4;
err = SPIBUS_TRANSFER(sc->sc_parent, sc->sc_dev, &cmd);
if (err)
return (NULL);
manufacturer_id = rxBuf[1];
dev_id = (rxBuf[2] << 8) | (rxBuf[3]);
for (i = 0; i < nitems(flash_devices); i++) {
if ((flash_devices[i].manufacturer_id == manufacturer_id) &&
(flash_devices[i].device_id == dev_id))
return &flash_devices[i];
}
device_printf(sc->sc_dev,
"Unknown SPI flash device. Vendor: %02x, device id: %04x\n",
manufacturer_id, dev_id);
return (NULL);
}
static int
mx25l_set_writable(struct mx25l_softc *sc, int writable)
{
uint8_t txBuf[1], rxBuf[1];
struct spi_command cmd;
int err;
memset(&cmd, 0, sizeof(cmd));
memset(txBuf, 0, sizeof(txBuf));
memset(rxBuf, 0, sizeof(rxBuf));
txBuf[0] = writable ? CMD_WRITE_ENABLE : CMD_WRITE_DISABLE;
cmd.tx_cmd = txBuf;
cmd.rx_cmd = rxBuf;
cmd.rx_cmd_sz = 1;
cmd.tx_cmd_sz = 1;
err = SPIBUS_TRANSFER(sc->sc_parent, sc->sc_dev, &cmd);
return (err);
}
static int
mx25l_erase_cmd(struct mx25l_softc *sc, off_t sector)
{
uint8_t txBuf[5], rxBuf[5];
struct spi_command cmd;
int err;
if ((err = mx25l_set_writable(sc, 1)) != 0)
return (err);
memset(&cmd, 0, sizeof(cmd));
memset(txBuf, 0, sizeof(txBuf));
memset(rxBuf, 0, sizeof(rxBuf));
cmd.tx_cmd = txBuf;
cmd.rx_cmd = rxBuf;
if (sc->sc_flags & FL_ERASE_4K)
txBuf[0] = CMD_BLOCK_4K_ERASE;
else if (sc->sc_flags & FL_ERASE_32K)
txBuf[0] = CMD_BLOCK_32K_ERASE;
else
txBuf[0] = CMD_SECTOR_ERASE;
if (sc->sc_flags & FL_ENABLE_4B_ADDR) {
cmd.rx_cmd_sz = 5;
cmd.tx_cmd_sz = 5;
txBuf[1] = ((sector >> 24) & 0xff);
txBuf[2] = ((sector >> 16) & 0xff);
txBuf[3] = ((sector >> 8) & 0xff);
txBuf[4] = (sector & 0xff);
} else {
cmd.rx_cmd_sz = 4;
cmd.tx_cmd_sz = 4;
txBuf[1] = ((sector >> 16) & 0xff);
txBuf[2] = ((sector >> 8) & 0xff);
txBuf[3] = (sector & 0xff);
}
if ((err = SPIBUS_TRANSFER(sc->sc_parent, sc->sc_dev, &cmd)) != 0)
return (err);
err = mx25l_wait_for_device_ready(sc);
return (err);
}
static int
mx25l_write(struct mx25l_softc *sc, off_t offset, caddr_t data, off_t count)
{
uint8_t txBuf[8], rxBuf[8];
struct spi_command cmd;
off_t bytes_to_write;
int err = 0;
if (sc->sc_flags & FL_ENABLE_4B_ADDR) {
cmd.tx_cmd_sz = 5;
cmd.rx_cmd_sz = 5;
} else {
cmd.tx_cmd_sz = 4;
cmd.rx_cmd_sz = 4;
}
/*
* Writes must be aligned to the erase sectorsize, since blocks are
* fully erased before they're written to.
*/
if (count % sc->sc_erasesize != 0 || offset % sc->sc_erasesize != 0)
return (EIO);
/*
* Maximum write size for CMD_PAGE_PROGRAM is FLASH_PAGE_SIZE, so loop
* to write chunks of FLASH_PAGE_SIZE bytes each.
*/
while (count != 0) {
/* If we crossed a sector boundary, erase the next sector. */
if (((offset) % sc->sc_erasesize) == 0) {
err = mx25l_erase_cmd(sc, offset);
if (err)
break;
}
txBuf[0] = CMD_PAGE_PROGRAM;
if (sc->sc_flags & FL_ENABLE_4B_ADDR) {
txBuf[1] = (offset >> 24) & 0xff;
txBuf[2] = (offset >> 16) & 0xff;
txBuf[3] = (offset >> 8) & 0xff;
txBuf[4] = offset & 0xff;
} else {
txBuf[1] = (offset >> 16) & 0xff;
txBuf[2] = (offset >> 8) & 0xff;
txBuf[3] = offset & 0xff;
}
bytes_to_write = MIN(FLASH_PAGE_SIZE, count);
cmd.tx_cmd = txBuf;
cmd.rx_cmd = rxBuf;
cmd.tx_data = data;
cmd.rx_data = sc->sc_dummybuf;
cmd.tx_data_sz = (uint32_t)bytes_to_write;
cmd.rx_data_sz = (uint32_t)bytes_to_write;
/*
* Each completed write operation resets WEL (write enable
* latch) to disabled state, so we re-enable it here.
*/
if ((err = mx25l_wait_for_device_ready(sc)) != 0)
break;
if ((err = mx25l_set_writable(sc, 1)) != 0)
break;
err = SPIBUS_TRANSFER(sc->sc_parent, sc->sc_dev, &cmd);
if (err != 0)
break;
err = mx25l_wait_for_device_ready(sc);
if (err)
break;
data += bytes_to_write;
offset += bytes_to_write;
count -= bytes_to_write;
}
return (err);
}
static int
mx25l_read(struct mx25l_softc *sc, off_t offset, caddr_t data, off_t count)
{
uint8_t txBuf[8], rxBuf[8];
struct spi_command cmd;
int err = 0;
/*
* Enforce that reads are aligned to the disk sectorsize, not the
* erase sectorsize. In this way, smaller read IO is possible,
* dramatically speeding up filesystem/geom_compress access.
*/
if (count % sc->sc_disk->d_sectorsize != 0 ||
offset % sc->sc_disk->d_sectorsize != 0)
return (EIO);
txBuf[0] = CMD_FAST_READ;
if (sc->sc_flags & FL_ENABLE_4B_ADDR) {
cmd.tx_cmd_sz = 6;
cmd.rx_cmd_sz = 6;
txBuf[1] = (offset >> 24) & 0xff;
txBuf[2] = (offset >> 16) & 0xff;
txBuf[3] = (offset >> 8) & 0xff;
txBuf[4] = offset & 0xff;
/* Dummy byte */
txBuf[5] = 0;
} else {
cmd.tx_cmd_sz = 5;
cmd.rx_cmd_sz = 5;
txBuf[1] = (offset >> 16) & 0xff;
txBuf[2] = (offset >> 8) & 0xff;
txBuf[3] = offset & 0xff;
/* Dummy byte */
txBuf[4] = 0;
}
cmd.tx_cmd = txBuf;
cmd.rx_cmd = rxBuf;
cmd.tx_data = data;
cmd.rx_data = data;
cmd.tx_data_sz = count;
cmd.rx_data_sz = count;
err = SPIBUS_TRANSFER(sc->sc_parent, sc->sc_dev, &cmd);
return (err);
}
static int
mx25l_set_4b_mode(struct mx25l_softc *sc, uint8_t command)
{
uint8_t txBuf[1], rxBuf[1];
struct spi_command cmd;
int err;
memset(&cmd, 0, sizeof(cmd));
memset(txBuf, 0, sizeof(txBuf));
memset(rxBuf, 0, sizeof(rxBuf));
cmd.tx_cmd_sz = cmd.rx_cmd_sz = 1;
cmd.tx_cmd = txBuf;
cmd.rx_cmd = rxBuf;
txBuf[0] = command;
if ((err = SPIBUS_TRANSFER(sc->sc_parent, sc->sc_dev, &cmd)) == 0)
err = mx25l_wait_for_device_ready(sc);
return (err);
}
#ifdef FDT
static struct ofw_compat_data compat_data[] = {
{ "st,m25p", 1 },
{ "jedec,spi-nor", 1 },
{ NULL, 0 },
};
#endif
static int
mx25l_probe(device_t dev)
{
#ifdef FDT
int i;
if (!ofw_bus_status_okay(dev))
return (ENXIO);
/* First try to match the compatible property to the compat_data */
if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 1)
goto found;
/*
* Next, try to find a compatible device using the names in the
* flash_devices structure
*/
for (i = 0; i < nitems(flash_devices); i++)
if (ofw_bus_is_compatible(dev, flash_devices[i].name))
goto found;
return (ENXIO);
found:
#endif
device_set_desc(dev, "M25Pxx Flash Family");
return (0);
}
static int
mx25l_attach(device_t dev)
{
struct mx25l_softc *sc;
struct mx25l_flash_ident *ident;
int err;
sc = device_get_softc(dev);
sc->sc_dev = dev;
sc->sc_parent = device_get_parent(sc->sc_dev);
M25PXX_LOCK_INIT(sc);
ident = mx25l_get_device_ident(sc);
if (ident == NULL)
return (ENXIO);
if ((err = mx25l_wait_for_device_ready(sc)) != 0)
return (err);
sc->sc_flags = ident->flags;
if (sc->sc_flags & FL_ERASE_4K)
sc->sc_erasesize = 4 * 1024;
else if (sc->sc_flags & FL_ERASE_32K)
sc->sc_erasesize = 32 * 1024;
else
sc->sc_erasesize = ident->sectorsize;
if (sc->sc_flags & FL_ENABLE_4B_ADDR) {
if ((err = mx25l_set_4b_mode(sc, CMD_ENTER_4B_MODE)) != 0)
return (err);
} else if (sc->sc_flags & FL_DISABLE_4B_ADDR) {
if ((err = mx25l_set_4b_mode(sc, CMD_EXIT_4B_MODE)) != 0)
return (err);
}
sc->sc_disk = disk_alloc();
sc->sc_disk->d_open = mx25l_open;
sc->sc_disk->d_close = mx25l_close;
sc->sc_disk->d_strategy = mx25l_strategy;
sc->sc_disk->d_getattr = mx25l_getattr;
sc->sc_disk->d_ioctl = mx25l_ioctl;
sc->sc_disk->d_name = "flash/mx25l";
sc->sc_disk->d_drv1 = sc;
sc->sc_disk->d_maxsize = DFLTPHYS;
sc->sc_disk->d_sectorsize = MX25L_SECTORSIZE;
sc->sc_disk->d_mediasize = ident->sectorsize * ident->sectorcount;
sc->sc_disk->d_stripesize = sc->sc_erasesize;
sc->sc_disk->d_unit = device_get_unit(sc->sc_dev);
sc->sc_disk->d_dump = NULL; /* NB: no dumps */
strlcpy(sc->sc_disk->d_descr, ident->name,
sizeof(sc->sc_disk->d_descr));
disk_create(sc->sc_disk, DISK_VERSION);
disk_add_alias(sc->sc_disk, "flash/spi");
bioq_init(&sc->sc_bio_queue);
kproc_create(&mx25l_task, sc, &sc->sc_p, 0, 0, "task: mx25l flash");
sc->sc_taskstate = TSTATE_RUNNING;
device_printf(sc->sc_dev,
"device type %s, size %dK in %d sectors of %dK, erase size %dK\n",
ident->name,
ident->sectorcount * ident->sectorsize / 1024,
ident->sectorcount, ident->sectorsize / 1024,
sc->sc_erasesize / 1024);
return (0);
}
static int
mx25l_detach(device_t dev)
{
struct mx25l_softc *sc;
int err;
sc = device_get_softc(dev);
err = 0;
M25PXX_LOCK(sc);
if (sc->sc_taskstate == TSTATE_RUNNING) {
sc->sc_taskstate = TSTATE_STOPPING;
wakeup(sc);
while (err == 0 && sc->sc_taskstate != TSTATE_STOPPED) {
err = msleep(sc, &sc->sc_mtx, 0, "mx25dt", hz * 3);
if (err != 0) {
sc->sc_taskstate = TSTATE_RUNNING;
device_printf(sc->sc_dev,
"Failed to stop queue task\n");
}
}
}
M25PXX_UNLOCK(sc);
if (err == 0 && sc->sc_taskstate == TSTATE_STOPPED) {
disk_destroy(sc->sc_disk);
bioq_flush(&sc->sc_bio_queue, NULL, ENXIO);
M25PXX_LOCK_DESTROY(sc);
}
return (err);
}
static int
mx25l_open(struct disk *dp)
{
return (0);
}
static int
mx25l_close(struct disk *dp)
{
return (0);
}
static int
mx25l_ioctl(struct disk *dp, u_long cmd, void *data, int fflag,
struct thread *td)
{
return (EINVAL);
}
static void
mx25l_strategy(struct bio *bp)
{
struct mx25l_softc *sc;
sc = (struct mx25l_softc *)bp->bio_disk->d_drv1;
M25PXX_LOCK(sc);
bioq_disksort(&sc->sc_bio_queue, bp);
wakeup(sc);
M25PXX_UNLOCK(sc);
}
static int
mx25l_getattr(struct bio *bp)
{
struct mx25l_softc *sc;
device_t dev;
if (bp->bio_disk == NULL || bp->bio_disk->d_drv1 == NULL)
return (ENXIO);
sc = bp->bio_disk->d_drv1;
dev = sc->sc_dev;
if (strcmp(bp->bio_attribute, "SPI::device") == 0) {
if (bp->bio_length != sizeof(dev))
return (EFAULT);
bcopy(&dev, bp->bio_data, sizeof(dev));
} else
return (-1);
return (0);
}
static void
mx25l_task(void *arg)
{
struct mx25l_softc *sc = (struct mx25l_softc*)arg;
struct bio *bp;
device_t dev;
for (;;) {
dev = sc->sc_dev;
M25PXX_LOCK(sc);
do {
if (sc->sc_taskstate == TSTATE_STOPPING) {
sc->sc_taskstate = TSTATE_STOPPED;
M25PXX_UNLOCK(sc);
wakeup(sc);
kproc_exit(0);
}
bp = bioq_first(&sc->sc_bio_queue);
if (bp == NULL)
msleep(sc, &sc->sc_mtx, PRIBIO, "mx25jq", 0);
} while (bp == NULL);
bioq_remove(&sc->sc_bio_queue, bp);
M25PXX_UNLOCK(sc);
switch (bp->bio_cmd) {
case BIO_READ:
bp->bio_error = mx25l_read(sc, bp->bio_offset,
bp->bio_data, bp->bio_bcount);
break;
case BIO_WRITE:
bp->bio_error = mx25l_write(sc, bp->bio_offset,
bp->bio_data, bp->bio_bcount);
break;
default:
bp->bio_error = EINVAL;
}
biodone(bp);
}
}
static devclass_t mx25l_devclass;
static device_method_t mx25l_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, mx25l_probe),
DEVMETHOD(device_attach, mx25l_attach),
DEVMETHOD(device_detach, mx25l_detach),
{ 0, 0 }
};
static driver_t mx25l_driver = {
"mx25l",
mx25l_methods,
sizeof(struct mx25l_softc),
};
DRIVER_MODULE(mx25l, spibus, mx25l_driver, mx25l_devclass, 0, 0);
MODULE_DEPEND(mx25l, spibus, 1, 1, 1);
#ifdef FDT
SPIBUS_PNP_INFO(compat_data);
#endif
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