691 lines
17 KiB
C
691 lines
17 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2009 Oleksandr Tymoshenko. All rights reserved.
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* Copyright (c) 2018 Ian Lepore. All rights reserved.
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* Copyright (c) 2006 M. Warner Losh <imp@FreeBSD.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#include "opt_platform.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/bio.h>
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#include <sys/bus.h>
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#include <sys/conf.h>
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#include <sys/kernel.h>
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#include <sys/kthread.h>
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#include <sys/lock.h>
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#include <sys/mbuf.h>
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#include <sys/malloc.h>
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#include <sys/module.h>
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#include <sys/mutex.h>
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#include <geom/geom_disk.h>
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#ifdef FDT
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#include <dev/fdt/fdt_common.h>
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#include <dev/ofw/ofw_bus_subr.h>
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#include <dev/ofw/openfirm.h>
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#endif
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#include <dev/spibus/spi.h>
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#include "spibus_if.h"
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#include <dev/flash/mx25lreg.h>
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#define FL_NONE 0x00
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#define FL_ERASE_4K 0x01
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#define FL_ERASE_32K 0x02
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#define FL_ENABLE_4B_ADDR 0x04
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#define FL_DISABLE_4B_ADDR 0x08
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/*
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* Define the sectorsize to be a smaller size rather than the flash
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* sector size. Trying to run FFS off of a 64k flash sector size
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* results in a completely un-usable system.
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*/
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#define MX25L_SECTORSIZE 512
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struct mx25l_flash_ident
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{
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const char *name;
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uint8_t manufacturer_id;
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uint16_t device_id;
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unsigned int sectorsize;
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unsigned int sectorcount;
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unsigned int flags;
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};
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struct mx25l_softc
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{
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device_t sc_dev;
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device_t sc_parent;
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uint8_t sc_manufacturer_id;
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uint16_t sc_device_id;
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unsigned int sc_erasesize;
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struct mtx sc_mtx;
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struct disk *sc_disk;
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struct proc *sc_p;
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struct bio_queue_head sc_bio_queue;
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unsigned int sc_flags;
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unsigned int sc_taskstate;
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uint8_t sc_dummybuf[FLASH_PAGE_SIZE];
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};
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#define TSTATE_STOPPED 0
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#define TSTATE_STOPPING 1
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#define TSTATE_RUNNING 2
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#define M25PXX_LOCK(_sc) mtx_lock(&(_sc)->sc_mtx)
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#define M25PXX_UNLOCK(_sc) mtx_unlock(&(_sc)->sc_mtx)
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#define M25PXX_LOCK_INIT(_sc) \
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mtx_init(&_sc->sc_mtx, device_get_nameunit(_sc->sc_dev), \
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"mx25l", MTX_DEF)
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#define M25PXX_LOCK_DESTROY(_sc) mtx_destroy(&_sc->sc_mtx);
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#define M25PXX_ASSERT_LOCKED(_sc) mtx_assert(&_sc->sc_mtx, MA_OWNED);
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#define M25PXX_ASSERT_UNLOCKED(_sc) mtx_assert(&_sc->sc_mtx, MA_NOTOWNED);
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/* disk routines */
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static int mx25l_open(struct disk *dp);
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static int mx25l_close(struct disk *dp);
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static int mx25l_ioctl(struct disk *, u_long, void *, int, struct thread *);
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static void mx25l_strategy(struct bio *bp);
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static int mx25l_getattr(struct bio *bp);
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static void mx25l_task(void *arg);
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static struct mx25l_flash_ident flash_devices[] = {
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{ "en25f32", 0x1c, 0x3116, 64 * 1024, 64, FL_NONE },
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{ "en25p32", 0x1c, 0x2016, 64 * 1024, 64, FL_NONE },
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{ "en25p64", 0x1c, 0x2017, 64 * 1024, 128, FL_NONE },
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{ "en25q32", 0x1c, 0x3016, 64 * 1024, 64, FL_NONE },
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{ "en25q64", 0x1c, 0x3017, 64 * 1024, 128, FL_ERASE_4K },
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{ "m25p32", 0x20, 0x2016, 64 * 1024, 64, FL_NONE },
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{ "m25p64", 0x20, 0x2017, 64 * 1024, 128, FL_NONE },
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{ "mx25l1606e", 0xc2, 0x2015, 64 * 1024, 32, FL_ERASE_4K},
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{ "mx25ll32", 0xc2, 0x2016, 64 * 1024, 64, FL_NONE },
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{ "mx25ll64", 0xc2, 0x2017, 64 * 1024, 128, FL_NONE },
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{ "mx25ll128", 0xc2, 0x2018, 64 * 1024, 256, FL_ERASE_4K | FL_ERASE_32K },
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{ "mx25ll256", 0xc2, 0x2019, 64 * 1024, 512, FL_ERASE_4K | FL_ERASE_32K | FL_ENABLE_4B_ADDR },
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{ "n25q64", 0x20, 0xba17, 64 * 1024, 128, FL_ERASE_4K },
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{ "s25fl032", 0x01, 0x0215, 64 * 1024, 64, FL_NONE },
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{ "s25fl064", 0x01, 0x0216, 64 * 1024, 128, FL_NONE },
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{ "s25fl128", 0x01, 0x2018, 64 * 1024, 256, FL_NONE },
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{ "s25fl256s", 0x01, 0x0219, 64 * 1024, 512, FL_NONE },
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{ "s25fl512s", 0x01, 0x0220, 64 * 1024, 1024, FL_NONE },
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{ "SST25VF010A", 0xbf, 0x2549, 4 * 1024, 32, FL_ERASE_4K | FL_ERASE_32K },
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{ "SST25VF032B", 0xbf, 0x254a, 64 * 1024, 64, FL_ERASE_4K | FL_ERASE_32K },
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/* Winbond -- w25x "blocks" are 64K, "sectors" are 4KiB */
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{ "w25x32", 0xef, 0x3016, 64 * 1024, 64, FL_ERASE_4K },
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{ "w25x64", 0xef, 0x3017, 64 * 1024, 128, FL_ERASE_4K },
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{ "w25q32", 0xef, 0x4016, 64 * 1024, 64, FL_ERASE_4K },
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{ "w25q64", 0xef, 0x4017, 64 * 1024, 128, FL_ERASE_4K },
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{ "w25q64bv", 0xef, 0x4017, 64 * 1024, 128, FL_ERASE_4K },
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{ "w25q128", 0xef, 0x4018, 64 * 1024, 256, FL_ERASE_4K },
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{ "w25q256", 0xef, 0x4019, 64 * 1024, 512, FL_ERASE_4K },
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/* Atmel */
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{ "at25df641", 0x1f, 0x4800, 64 * 1024, 128, FL_ERASE_4K },
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/* GigaDevice */
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{ "gd25q64", 0xc8, 0x4017, 64 * 1024, 128, FL_ERASE_4K },
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{ "gd25q128", 0xc8, 0x4018, 64 * 1024, 256, FL_ERASE_4K },
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/* Integrated Silicon Solution */
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{ "is25wp256", 0x9d, 0x7019, 64 * 1024, 512, FL_ERASE_4K | FL_ENABLE_4B_ADDR},
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};
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static int
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mx25l_wait_for_device_ready(struct mx25l_softc *sc)
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{
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uint8_t txBuf[2], rxBuf[2];
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struct spi_command cmd;
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int err;
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memset(&cmd, 0, sizeof(cmd));
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do {
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txBuf[0] = CMD_READ_STATUS;
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cmd.tx_cmd = txBuf;
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cmd.rx_cmd = rxBuf;
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cmd.rx_cmd_sz = 2;
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cmd.tx_cmd_sz = 2;
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err = SPIBUS_TRANSFER(sc->sc_parent, sc->sc_dev, &cmd);
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} while (err == 0 && (rxBuf[1] & STATUS_WIP));
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return (err);
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}
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static struct mx25l_flash_ident*
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mx25l_get_device_ident(struct mx25l_softc *sc)
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{
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uint8_t txBuf[8], rxBuf[8];
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struct spi_command cmd;
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uint8_t manufacturer_id;
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uint16_t dev_id;
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int err, i;
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memset(&cmd, 0, sizeof(cmd));
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memset(txBuf, 0, sizeof(txBuf));
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memset(rxBuf, 0, sizeof(rxBuf));
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txBuf[0] = CMD_READ_IDENT;
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cmd.tx_cmd = &txBuf;
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cmd.rx_cmd = &rxBuf;
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/*
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* Some compatible devices has extended two-bytes ID
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* We'll use only manufacturer/deviceid atm
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*/
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cmd.tx_cmd_sz = 4;
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cmd.rx_cmd_sz = 4;
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err = SPIBUS_TRANSFER(sc->sc_parent, sc->sc_dev, &cmd);
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if (err)
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return (NULL);
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manufacturer_id = rxBuf[1];
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dev_id = (rxBuf[2] << 8) | (rxBuf[3]);
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for (i = 0; i < nitems(flash_devices); i++) {
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if ((flash_devices[i].manufacturer_id == manufacturer_id) &&
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(flash_devices[i].device_id == dev_id))
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return &flash_devices[i];
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}
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device_printf(sc->sc_dev,
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"Unknown SPI flash device. Vendor: %02x, device id: %04x\n",
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manufacturer_id, dev_id);
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return (NULL);
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}
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static int
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mx25l_set_writable(struct mx25l_softc *sc, int writable)
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{
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uint8_t txBuf[1], rxBuf[1];
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struct spi_command cmd;
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int err;
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memset(&cmd, 0, sizeof(cmd));
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memset(txBuf, 0, sizeof(txBuf));
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memset(rxBuf, 0, sizeof(rxBuf));
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txBuf[0] = writable ? CMD_WRITE_ENABLE : CMD_WRITE_DISABLE;
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cmd.tx_cmd = txBuf;
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cmd.rx_cmd = rxBuf;
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cmd.rx_cmd_sz = 1;
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cmd.tx_cmd_sz = 1;
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err = SPIBUS_TRANSFER(sc->sc_parent, sc->sc_dev, &cmd);
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return (err);
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}
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static int
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mx25l_erase_cmd(struct mx25l_softc *sc, off_t sector)
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{
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uint8_t txBuf[5], rxBuf[5];
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struct spi_command cmd;
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int err;
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if ((err = mx25l_set_writable(sc, 1)) != 0)
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return (err);
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memset(&cmd, 0, sizeof(cmd));
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memset(txBuf, 0, sizeof(txBuf));
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memset(rxBuf, 0, sizeof(rxBuf));
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cmd.tx_cmd = txBuf;
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cmd.rx_cmd = rxBuf;
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if (sc->sc_flags & FL_ERASE_4K)
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txBuf[0] = CMD_BLOCK_4K_ERASE;
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else if (sc->sc_flags & FL_ERASE_32K)
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txBuf[0] = CMD_BLOCK_32K_ERASE;
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else
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txBuf[0] = CMD_SECTOR_ERASE;
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if (sc->sc_flags & FL_ENABLE_4B_ADDR) {
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cmd.rx_cmd_sz = 5;
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cmd.tx_cmd_sz = 5;
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txBuf[1] = ((sector >> 24) & 0xff);
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txBuf[2] = ((sector >> 16) & 0xff);
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txBuf[3] = ((sector >> 8) & 0xff);
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txBuf[4] = (sector & 0xff);
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} else {
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cmd.rx_cmd_sz = 4;
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cmd.tx_cmd_sz = 4;
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txBuf[1] = ((sector >> 16) & 0xff);
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txBuf[2] = ((sector >> 8) & 0xff);
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txBuf[3] = (sector & 0xff);
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}
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if ((err = SPIBUS_TRANSFER(sc->sc_parent, sc->sc_dev, &cmd)) != 0)
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return (err);
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err = mx25l_wait_for_device_ready(sc);
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return (err);
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}
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static int
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mx25l_write(struct mx25l_softc *sc, off_t offset, caddr_t data, off_t count)
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{
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uint8_t txBuf[8], rxBuf[8];
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struct spi_command cmd;
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off_t bytes_to_write;
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int err = 0;
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if (sc->sc_flags & FL_ENABLE_4B_ADDR) {
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cmd.tx_cmd_sz = 5;
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cmd.rx_cmd_sz = 5;
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} else {
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cmd.tx_cmd_sz = 4;
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cmd.rx_cmd_sz = 4;
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}
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/*
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* Writes must be aligned to the erase sectorsize, since blocks are
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* fully erased before they're written to.
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*/
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if (count % sc->sc_erasesize != 0 || offset % sc->sc_erasesize != 0)
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return (EIO);
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/*
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* Maximum write size for CMD_PAGE_PROGRAM is FLASH_PAGE_SIZE, so loop
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* to write chunks of FLASH_PAGE_SIZE bytes each.
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*/
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while (count != 0) {
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/* If we crossed a sector boundary, erase the next sector. */
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if (((offset) % sc->sc_erasesize) == 0) {
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err = mx25l_erase_cmd(sc, offset);
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if (err)
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break;
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}
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txBuf[0] = CMD_PAGE_PROGRAM;
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if (sc->sc_flags & FL_ENABLE_4B_ADDR) {
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txBuf[1] = (offset >> 24) & 0xff;
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txBuf[2] = (offset >> 16) & 0xff;
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txBuf[3] = (offset >> 8) & 0xff;
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txBuf[4] = offset & 0xff;
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} else {
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txBuf[1] = (offset >> 16) & 0xff;
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txBuf[2] = (offset >> 8) & 0xff;
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txBuf[3] = offset & 0xff;
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}
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bytes_to_write = MIN(FLASH_PAGE_SIZE, count);
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cmd.tx_cmd = txBuf;
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cmd.rx_cmd = rxBuf;
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cmd.tx_data = data;
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cmd.rx_data = sc->sc_dummybuf;
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cmd.tx_data_sz = (uint32_t)bytes_to_write;
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cmd.rx_data_sz = (uint32_t)bytes_to_write;
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/*
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* Each completed write operation resets WEL (write enable
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* latch) to disabled state, so we re-enable it here.
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*/
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if ((err = mx25l_wait_for_device_ready(sc)) != 0)
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break;
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if ((err = mx25l_set_writable(sc, 1)) != 0)
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break;
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err = SPIBUS_TRANSFER(sc->sc_parent, sc->sc_dev, &cmd);
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if (err != 0)
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break;
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err = mx25l_wait_for_device_ready(sc);
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if (err)
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break;
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data += bytes_to_write;
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offset += bytes_to_write;
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count -= bytes_to_write;
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}
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return (err);
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}
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static int
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mx25l_read(struct mx25l_softc *sc, off_t offset, caddr_t data, off_t count)
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{
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uint8_t txBuf[8], rxBuf[8];
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struct spi_command cmd;
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int err = 0;
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/*
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* Enforce that reads are aligned to the disk sectorsize, not the
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* erase sectorsize. In this way, smaller read IO is possible,
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* dramatically speeding up filesystem/geom_compress access.
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*/
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if (count % sc->sc_disk->d_sectorsize != 0 ||
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offset % sc->sc_disk->d_sectorsize != 0)
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return (EIO);
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txBuf[0] = CMD_FAST_READ;
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if (sc->sc_flags & FL_ENABLE_4B_ADDR) {
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cmd.tx_cmd_sz = 6;
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cmd.rx_cmd_sz = 6;
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txBuf[1] = (offset >> 24) & 0xff;
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txBuf[2] = (offset >> 16) & 0xff;
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txBuf[3] = (offset >> 8) & 0xff;
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txBuf[4] = offset & 0xff;
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/* Dummy byte */
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txBuf[5] = 0;
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} else {
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cmd.tx_cmd_sz = 5;
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cmd.rx_cmd_sz = 5;
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txBuf[1] = (offset >> 16) & 0xff;
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txBuf[2] = (offset >> 8) & 0xff;
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txBuf[3] = offset & 0xff;
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/* Dummy byte */
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txBuf[4] = 0;
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}
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cmd.tx_cmd = txBuf;
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cmd.rx_cmd = rxBuf;
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cmd.tx_data = data;
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cmd.rx_data = data;
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cmd.tx_data_sz = count;
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cmd.rx_data_sz = count;
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err = SPIBUS_TRANSFER(sc->sc_parent, sc->sc_dev, &cmd);
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return (err);
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}
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static int
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mx25l_set_4b_mode(struct mx25l_softc *sc, uint8_t command)
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{
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uint8_t txBuf[1], rxBuf[1];
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struct spi_command cmd;
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int err;
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memset(&cmd, 0, sizeof(cmd));
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memset(txBuf, 0, sizeof(txBuf));
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memset(rxBuf, 0, sizeof(rxBuf));
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cmd.tx_cmd_sz = cmd.rx_cmd_sz = 1;
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cmd.tx_cmd = txBuf;
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cmd.rx_cmd = rxBuf;
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txBuf[0] = command;
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if ((err = SPIBUS_TRANSFER(sc->sc_parent, sc->sc_dev, &cmd)) == 0)
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err = mx25l_wait_for_device_ready(sc);
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return (err);
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}
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#ifdef FDT
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static struct ofw_compat_data compat_data[] = {
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{ "st,m25p", 1 },
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{ "jedec,spi-nor", 1 },
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{ NULL, 0 },
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};
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#endif
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static int
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mx25l_probe(device_t dev)
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{
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#ifdef FDT
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int i;
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if (!ofw_bus_status_okay(dev))
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return (ENXIO);
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/* First try to match the compatible property to the compat_data */
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|
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/spi";
|
|
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);
|
|
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;
|
|
|
|
for (;;) {
|
|
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 = EOPNOTSUPP;
|
|
}
|
|
|
|
|
|
biodone(bp);
|
|
}
|
|
}
|
|
|
|
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, 0, 0);
|
|
MODULE_DEPEND(mx25l, spibus, 1, 1, 1);
|
|
#ifdef FDT
|
|
MODULE_DEPEND(mx25l, fdt_slicer, 1, 1, 1);
|
|
SPIBUS_FDT_PNP_INFO(compat_data);
|
|
#endif
|