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Merge from projects/mips to head by hand:

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Merge support for MX25L spi flash.
This commit is contained in:
Warner Losh 2010-01-10 05:15:46 +00:00
commit c5455f1b46
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=201981
1 changed files with 479 additions and 0 deletions
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sys/dev/flash/mx25l.c Normal file
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/*-
* 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;
unsigned int sc_sectorsize;
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 },
{ "s25fl128", 0x01, 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 void
mx25l_set_writable(device_t dev, 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(device_get_parent(dev), dev, &cmd);
}
static void
mx25l_erase_sector(device_t dev, off_t sector)
{
uint8_t txBuf[4], rxBuf[4];
struct spi_command cmd;
int err;
mx25l_wait_for_device_ready(dev);
mx25l_set_writable(dev, 1);
memset(&cmd, 0, sizeof(cmd));
memset(txBuf, 0, sizeof(txBuf));
memset(rxBuf, 0, sizeof(rxBuf));
txBuf[0] = CMD_SECTOR_ERASE;
cmd.tx_cmd = txBuf;
cmd.rx_cmd = rxBuf;
cmd.rx_cmd_sz = 4;
cmd.tx_cmd_sz = 4;
txBuf[1] = ((sector >> 16) & 0xff);
txBuf[2] = ((sector >> 8) & 0xff);
txBuf[3] = (sector & 0xff);
err = SPIBUS_TRANSFER(device_get_parent(dev), dev, &cmd);
}
static int
mx25l_write(device_t dev, off_t offset, caddr_t data, off_t count)
{
struct mx25l_softc *sc;
uint8_t txBuf[8], rxBuf[8];
struct spi_command cmd;
off_t write_offset;
long bytes_to_write, bytes_writen;
device_t pdev;
int err = 0;
pdev = device_get_parent(dev);
sc = device_get_softc(dev);
cmd.tx_cmd_sz = 4;
cmd.rx_cmd_sz = 4;
bytes_writen = 0;
write_offset = offset;
/*
* Sanity checks
*/
KASSERT(count % sc->sc_sectorsize == 0,
("count for BIO_WRITE is not sector size (%d bytes) aligned",
sc->sc_sectorsize));
KASSERT(offset % sc->sc_sectorsize == 0,
("offset for BIO_WRITE is not sector size (%d bytes) aligned",
sc->sc_sectorsize));
/*
* Assume here that we write per-sector only
* and sector size should be 256 bytes aligned
*/
KASSERT(write_offset % FLASH_PAGE_SIZE == 0,
("offset for BIO_WRITE is not page size (%d bytes) aligned",
FLASH_PAGE_SIZE));
/*
* Maximum write size for CMD_PAGE_PROGRAM is
* FLASH_PAGE_SIZE, so split data to chunks
* FLASH_PAGE_SIZE bytes eash and write them
* one by one
*/
while (bytes_writen < count) {
/*
* If we crossed sector boundary - erase next sector
*/
if (((offset + bytes_writen) % sc->sc_sectorsize) == 0)
mx25l_erase_sector(dev, offset + bytes_writen);
txBuf[0] = CMD_PAGE_PROGRAM;
txBuf[1] = ((write_offset >> 16) & 0xff);
txBuf[2] = ((write_offset >> 8) & 0xff);
txBuf[3] = (write_offset & 0xff);
bytes_to_write = MIN(FLASH_PAGE_SIZE,
count - bytes_writen);
cmd.tx_cmd = txBuf;
cmd.rx_cmd = rxBuf;
cmd.tx_data = data + bytes_writen;
cmd.tx_data_sz = bytes_to_write;
cmd.rx_data = data + bytes_writen;
cmd.rx_data_sz = bytes_to_write;
/*
* Eash completed write operation resets WEL
* (write enable latch) to disabled state,
* so we re-enable it here
*/
mx25l_wait_for_device_ready(dev);
mx25l_set_writable(dev, 1);
err = SPIBUS_TRANSFER(pdev, dev, &cmd);
if (err)
break;
bytes_writen += bytes_to_write;
write_offset += bytes_to_write;
}
return (err);
}
static int
mx25l_read(device_t dev, off_t offset, caddr_t data, off_t count)
{
struct mx25l_softc *sc;
uint8_t txBuf[8], rxBuf[8];
struct spi_command cmd;
device_t pdev;
int err = 0;
pdev = device_get_parent(dev);
sc = device_get_softc(dev);
/*
* Sanity checks
*/
KASSERT(count % sc->sc_sectorsize == 0,
("count for BIO_WRITE is not sector size (%d bytes) aligned",
sc->sc_sectorsize));
KASSERT(offset % sc->sc_sectorsize == 0,
("offset for BIO_WRITE is not sector size (%d bytes) aligned",
sc->sc_sectorsize));
txBuf[0] = CMD_FAST_READ;
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.tx_data_sz = count;
cmd.rx_data = data;
cmd.rx_data_sz = count;
err = SPIBUS_TRANSFER(pdev, dev, &cmd);
return (err);
}
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 */
/* Sectorsize for erase operations */
sc->sc_sectorsize = ident->sectorsize;
/* 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;
device_t dev;
for (;;) {
dev = sc->sc_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);
switch (bp->bio_cmd) {
case BIO_READ:
bp->bio_error = mx25l_read(dev, bp->bio_offset,
bp->bio_data, bp->bio_bcount);
break;
case BIO_WRITE:
bp->bio_error = mx25l_write(dev, 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);