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- Add support for MX25Lxxx SPI flash (readonly atm)

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gonzo 2009-05-18 23:20:56 +00:00
parent 3a3558a8c1
commit 139c4bb3e7
3 changed files with 370 additions and 0 deletions
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1
sys/conf/files
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@ -903,6 +903,7 @@ dev/firewire/if_fwip.c optional fwip
dev/firewire/sbp.c optional sbp
dev/firewire/sbp_targ.c optional sbp_targ
dev/flash/at45d.c optional at45d
dev/flash/mx25l.c optional mx25l
dev/fxp/if_fxp.c optional fxp
dev/gem/if_gem.c optional gem
dev/gem/if_gem_pci.c optional gem pci

313
sys/dev/flash/mx25l.c Normal file
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@ -0,0 +1,313 @@
/*-
* Copyright (c) 2006 M. Warner Losh. All rights reserved.
* Copyright (c) 2009 Oleksandr Tymoshenko. 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 <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>
#include <dev/spibus/spi.h>
#include "spibus_if.h"
#include <dev/flash/mx25lreg.h>
struct mx25l_flash_ident
{
const char *name;
uint8_t manufacturer_id;
uint16_t device_id;
unsigned int sectorsize;
unsigned int sectorcount;
};
struct mx25l_softc
{
device_t sc_dev;
uint8_t sc_manufacturer_id;
uint16_t sc_device_id;
struct mtx sc_mtx;
struct disk *sc_disk;
struct proc *sc_p;
struct bio_queue_head sc_bio_queue;
};
#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 void mx25l_task(void *arg);
struct mx25l_flash_ident flash_devices[] = {
{ "mx25ll32", 0xc2, 0x2016, 64 * 1024, 64 },
{ "mx25ll64", 0xc2, 0x2017, 64 * 1024, 128 },
{ "mx25ll128", 0xc2, 0x2018, 64 * 1024, 256 },
};
static uint8_t
mx25l_get_status(device_t dev)
{
uint8_t txBuf[2], rxBuf[2];
struct spi_command cmd;
int err;
memset(&cmd, 0, sizeof(cmd));
memset(txBuf, 0, sizeof(txBuf));
memset(rxBuf, 0, sizeof(rxBuf));
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(device_get_parent(dev), dev, &cmd);
return (rxBuf[1]);
}
static void
mx25l_wait_for_device_ready(device_t dev)
{
while ((mx25l_get_status(dev) & STATUS_WIP))
continue;
}
static struct mx25l_flash_ident*
mx25l_get_device_ident(struct mx25l_softc *sc)
{
device_t dev = sc->sc_dev;
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(device_get_parent(dev), dev, &cmd);
if (err)
return (NULL);
manufacturer_id = rxBuf[1];
dev_id = (rxBuf[2] << 8) | (rxBuf[3]);
for (i = 0;
i < sizeof(flash_devices)/sizeof(struct mx25l_flash_ident); i++) {
if ((flash_devices[i].manufacturer_id == manufacturer_id) &&
(flash_devices[i].device_id == dev_id))
return &flash_devices[i];
}
printf("Unknown SPI flash device. Vendor: %02x, device id: %04x\n",
manufacturer_id, dev_id);
return (NULL);
}
static int
mx25l_probe(device_t dev)
{
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;
sc = device_get_softc(dev);
sc->sc_dev = dev;
M25PXX_LOCK_INIT(sc);
ident = mx25l_get_device_ident(sc);
if (ident == NULL)
return (ENXIO);
mx25l_wait_for_device_ready(sc->sc_dev);
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_ioctl = mx25l_ioctl;
sc->sc_disk->d_name = "flash/spi";
sc->sc_disk->d_drv1 = sc;
sc->sc_disk->d_maxsize = DFLTPHYS;
sc->sc_disk->d_sectorsize = ident->sectorsize;
sc->sc_disk->d_mediasize = ident->sectorsize * ident->sectorcount;
sc->sc_disk->d_unit = device_get_unit(sc->sc_dev);
sc->sc_disk->d_dump = NULL; /* NB: no dumps */
/* NB: use stripesize to hold the erase/region size for RedBoot */
sc->sc_disk->d_stripesize = ident->sectorsize;
disk_create(sc->sc_disk, DISK_VERSION);
bioq_init(&sc->sc_bio_queue);
kproc_create(&mx25l_task, sc, &sc->sc_p, 0, 0, "task: mx25l flash");
device_printf(sc->sc_dev, "%s, sector %d bytes, %d sectors\n",
ident->name, ident->sectorsize, ident->sectorcount);
return (0);
}
static int
mx25l_detach(device_t dev)
{
return (EIO);
}
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 void
mx25l_task(void *arg)
{
struct mx25l_softc *sc = (struct mx25l_softc*)arg;
struct bio *bp;
uint8_t txBuf[8], rxBuf[8];
struct spi_command cmd;
device_t dev, pdev;
for (;;) {
dev = sc->sc_dev;
pdev = device_get_parent(dev);
M25PXX_LOCK(sc);
do {
bp = bioq_first(&sc->sc_bio_queue);
if (bp == NULL)
msleep(sc, &sc->sc_mtx, PRIBIO, "jobqueue", 0);
} while (bp == NULL);
bioq_remove(&sc->sc_bio_queue, bp);
M25PXX_UNLOCK(sc);
if (bp->bio_cmd == BIO_READ) {
txBuf[0] = CMD_FAST_READ;
cmd.tx_cmd_sz = 5;
cmd.rx_cmd_sz = 5;
txBuf[1] = (((bp->bio_offset) >> 16) & 0xff);
txBuf[2] = (((bp->bio_offset) >> 8) & 0xff);
txBuf[3] = ((bp->bio_offset) & 0xff);
/* Dummy byte */
txBuf[4] = 0;
cmd.tx_cmd = txBuf;
cmd.rx_cmd = rxBuf;
cmd.tx_data = bp->bio_data;
cmd.tx_data_sz = bp->bio_bcount;
cmd.rx_data = bp->bio_data;
cmd.rx_data_sz = bp->bio_bcount;
bp->bio_error = SPIBUS_TRANSFER(pdev, dev, &cmd);
}
else
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);

56
sys/dev/flash/mx25lreg.h Normal file
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@ -0,0 +1,56 @@
/*-
* Copyright (c) 2009, Oleksandr Tymoshenko <gonzo@FreeBSD.org>
* 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 unmodified, 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.
*/
#ifndef __MX25LREG_H__
#define __MX25LREG_H__
/*
* Commands
*/
#define CMD_WRITE_ENABLE 0x06
#define CMD_WRITE_DISABLE 0x04
#define CMD_READ_IDENT 0x9F
#define CMD_READ_STATUS 0x05
#define CMD_WRITE_STATUS 0x01
#define CMD_READ 0x03
#define CMD_FAST_READ 0x0B
#define CMD_PAGE_PROGRAM 0x02
#define CMD_SECTOR_ERASE 0xD8
#define CMD_BULK_ERASE 0xC7
/*
* Status register flags
*/
#define STATUS_SRWD (1 << 7)
#define STATUS_BP2 (1 << 4)
#define STATUS_BP1 (1 << 3)
#define STATUS_BP0 (1 << 2)
#define STATUS_WEL (1 << 1)
#define STATUS_WIP (1 << 0)
#endif /* __MX25LREG_H__ */