29658c96ce
them, please let me know if not). Most of these are of the form:
static const struct bzzt_type {
[...list of members...]
} const bzzt_devs[] = {
[...list of initializers...]
};
The second const is unnecessary, as arrays cannot be modified anyway,
and if the elements are const, the whole thing is const automatically
(e.g. it is placed in .rodata).
I have verified this does not change the binary output of a full kernel
build (except for build timestamps embedded in the object files).
Reviewed by: yongari, marius
MFC after: 1 week
449 lines
11 KiB
C
449 lines
11 KiB
C
/*-
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* Copyright (c) 2006 M. Warner Losh
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* Copyright (c) 2011-2012 Ian Lepore
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* Copyright (c) 2012 Marius Strobl <marius@FreeBSD.org>
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* All rights reserved.
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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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__FBSDID("$FreeBSD$");
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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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#include <dev/spibus/spi.h>
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#include "spibus_if.h"
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struct at45d_flash_ident
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{
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const char *name;
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uint32_t jedec;
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uint16_t pagecount;
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uint16_t pageoffset;
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uint16_t pagesize;
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uint16_t pagesize2n;
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};
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struct at45d_softc
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{
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struct bio_queue_head bio_queue;
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struct mtx sc_mtx;
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struct disk *disk;
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struct proc *p;
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struct intr_config_hook config_intrhook;
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device_t dev;
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uint16_t pagecount;
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uint16_t pageoffset;
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uint16_t pagesize;
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};
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#define AT45D_LOCK(_sc) mtx_lock(&(_sc)->sc_mtx)
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#define AT45D_UNLOCK(_sc) mtx_unlock(&(_sc)->sc_mtx)
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#define AT45D_LOCK_INIT(_sc) \
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mtx_init(&_sc->sc_mtx, device_get_nameunit(_sc->dev), \
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"at45d", MTX_DEF)
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#define AT45D_LOCK_DESTROY(_sc) mtx_destroy(&_sc->sc_mtx);
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#define AT45D_ASSERT_LOCKED(_sc) mtx_assert(&_sc->sc_mtx, MA_OWNED);
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#define AT45D_ASSERT_UNLOCKED(_sc) mtx_assert(&_sc->sc_mtx, MA_NOTOWNED);
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/* bus entry points */
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static device_attach_t at45d_attach;
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static device_detach_t at45d_detach;
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static device_probe_t at45d_probe;
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/* disk routines */
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static int at45d_close(struct disk *dp);
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static int at45d_open(struct disk *dp);
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static void at45d_strategy(struct bio *bp);
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static void at45d_task(void *arg);
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/* helper routines */
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static void at45d_delayed_attach(void *xsc);
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static int at45d_get_mfg_info(device_t dev, uint8_t *resp);
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static int at45d_get_status(device_t dev, uint8_t *status);
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static int at45d_wait_ready(device_t dev, uint8_t *status);
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#define BUFFER_TRANSFER 0x53
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#define BUFFER_COMPARE 0x60
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#define PROGRAM_THROUGH_BUFFER 0x82
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#define MANUFACTURER_ID 0x9f
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#define STATUS_REGISTER_READ 0xd7
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#define CONTINUOUS_ARRAY_READ 0xe8
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/*
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* A sectorsize2n != 0 is used to indicate that a device optionally supports
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* 2^N byte pages. If support for the latter is enabled, the sector offset
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* has to be reduced by one.
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*/
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static const struct at45d_flash_ident at45d_flash_devices[] = {
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{ "AT45DB011B", 0x1f2200, 512, 9, 264, 256 },
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{ "AT45DB021B", 0x1f2300, 1024, 9, 264, 256 },
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{ "AT45DB041x", 0x1f2400, 2028, 9, 264, 256 },
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{ "AT45DB081B", 0x1f2500, 4096, 9, 264, 256 },
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{ "AT45DB161x", 0x1f2600, 4096, 10, 528, 512 },
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{ "AT45DB321x", 0x1f2700, 8192, 10, 528, 0 },
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{ "AT45DB321x", 0x1f2701, 8192, 10, 528, 512 },
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{ "AT45DB642x", 0x1f2800, 8192, 11, 1056, 1024 }
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};
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static int
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at45d_get_status(device_t dev, uint8_t *status)
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{
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uint8_t rxBuf[8], txBuf[8];
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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] = STATUS_REGISTER_READ;
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cmd.tx_cmd = txBuf;
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cmd.rx_cmd = rxBuf;
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cmd.rx_cmd_sz = cmd.tx_cmd_sz = 2;
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err = SPIBUS_TRANSFER(device_get_parent(dev), dev, &cmd);
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*status = rxBuf[1];
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return (err);
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}
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static int
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at45d_get_mfg_info(device_t dev, uint8_t *resp)
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{
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uint8_t rxBuf[8], txBuf[8];
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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] = MANUFACTURER_ID;
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cmd.tx_cmd = &txBuf;
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cmd.rx_cmd = &rxBuf;
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cmd.tx_cmd_sz = cmd.rx_cmd_sz = 5;
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err = SPIBUS_TRANSFER(device_get_parent(dev), dev, &cmd);
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if (err)
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return (err);
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memcpy(resp, rxBuf + 1, 4);
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return (0);
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}
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static int
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at45d_wait_ready(device_t dev, uint8_t *status)
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{
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struct timeval now, tout;
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int err;
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getmicrouptime(&tout);
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tout.tv_sec += 3;
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do {
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getmicrouptime(&now);
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if (now.tv_sec > tout.tv_sec)
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err = ETIMEDOUT;
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else
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err = at45d_get_status(dev, status);
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} while (err == 0 && (*status & 0x80) == 0);
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return (err);
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}
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static int
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at45d_probe(device_t dev)
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{
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device_set_desc(dev, "AT45D Flash Family");
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return (0);
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}
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static int
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at45d_attach(device_t dev)
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{
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struct at45d_softc *sc;
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sc = device_get_softc(dev);
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sc->dev = dev;
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AT45D_LOCK_INIT(sc);
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/* We'll see what kind of flash we have later... */
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sc->config_intrhook.ich_func = at45d_delayed_attach;
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sc->config_intrhook.ich_arg = sc;
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if (config_intrhook_establish(&sc->config_intrhook) != 0)
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device_printf(dev, "config_intrhook_establish failed\n");
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return (0);
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}
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static int
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at45d_detach(device_t dev)
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{
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return (EBUSY) /* XXX */;
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}
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static void
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at45d_delayed_attach(void *xsc)
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{
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struct at45d_softc *sc;
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const struct at45d_flash_ident *ident;
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u_int i;
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uint32_t jedec;
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uint16_t pagesize;
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uint8_t buf[4], status;
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sc = xsc;
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ident = NULL;
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jedec = 0;
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if (at45d_wait_ready(sc->dev, &status) != 0)
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device_printf(sc->dev, "Error waiting for device-ready.\n");
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else if (at45d_get_mfg_info(sc->dev, buf) != 0)
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device_printf(sc->dev, "Failed to get ID.\n");
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else {
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jedec = buf[0] << 16 | buf[1] << 8 | buf[2];
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for (i = 0; i < nitems(at45d_flash_devices); i++) {
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if (at45d_flash_devices[i].jedec == jedec) {
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ident = &at45d_flash_devices[i];
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break;
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}
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}
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}
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if (ident == NULL)
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device_printf(sc->dev, "JEDEC 0x%x not in list.\n", jedec);
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else {
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sc->pagecount = ident->pagecount;
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sc->pageoffset = ident->pageoffset;
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if (ident->pagesize2n != 0 && (status & 0x01) != 0) {
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sc->pageoffset -= 1;
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pagesize = ident->pagesize2n;
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} else
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pagesize = ident->pagesize;
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sc->pagesize = pagesize;
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sc->disk = disk_alloc();
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sc->disk->d_open = at45d_open;
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sc->disk->d_close = at45d_close;
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sc->disk->d_strategy = at45d_strategy;
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sc->disk->d_name = "flash/spi";
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sc->disk->d_drv1 = sc;
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sc->disk->d_maxsize = DFLTPHYS;
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sc->disk->d_sectorsize = pagesize;
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sc->disk->d_mediasize = pagesize * ident->pagecount;
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sc->disk->d_unit = device_get_unit(sc->dev);
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disk_create(sc->disk, DISK_VERSION);
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bioq_init(&sc->bio_queue);
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kproc_create(&at45d_task, sc, &sc->p, 0, 0,
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"task: at45d flash");
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device_printf(sc->dev, "%s, %d bytes per page, %d pages\n",
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ident->name, pagesize, ident->pagecount);
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}
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config_intrhook_disestablish(&sc->config_intrhook);
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}
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static int
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at45d_open(struct disk *dp)
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{
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return (0);
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}
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static int
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at45d_close(struct disk *dp)
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{
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return (0);
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}
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static void
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at45d_strategy(struct bio *bp)
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{
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struct at45d_softc *sc;
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sc = (struct at45d_softc *)bp->bio_disk->d_drv1;
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AT45D_LOCK(sc);
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bioq_disksort(&sc->bio_queue, bp);
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wakeup(sc);
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AT45D_UNLOCK(sc);
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}
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static void
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at45d_task(void *arg)
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{
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uint8_t rxBuf[8], txBuf[8];
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struct at45d_softc *sc;
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struct bio *bp;
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struct spi_command cmd;
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device_t dev, pdev;
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caddr_t buf;
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u_long len, resid;
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u_int addr, berr, err, offset, page;
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uint8_t status;
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sc = (struct at45d_softc*)arg;
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dev = sc->dev;
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pdev = device_get_parent(dev);
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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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for (;;) {
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AT45D_LOCK(sc);
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do {
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bp = bioq_takefirst(&sc->bio_queue);
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if (bp == NULL)
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msleep(sc, &sc->sc_mtx, PRIBIO, "jobqueue", 0);
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} while (bp == NULL);
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AT45D_UNLOCK(sc);
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berr = 0;
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buf = bp->bio_data;
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len = resid = bp->bio_bcount;
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page = bp->bio_offset / sc->pagesize;
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offset = bp->bio_offset % sc->pagesize;
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switch (bp->bio_cmd) {
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case BIO_READ:
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txBuf[0] = CONTINUOUS_ARRAY_READ;
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cmd.tx_cmd_sz = cmd.rx_cmd_sz = 8;
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cmd.tx_data = cmd.rx_data = buf;
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break;
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case BIO_WRITE:
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cmd.tx_cmd_sz = cmd.rx_cmd_sz = 4;
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cmd.tx_data = cmd.rx_data = buf;
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if (resid + offset > sc->pagesize)
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len = sc->pagesize - offset;
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break;
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default:
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berr = EINVAL;
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goto out;
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}
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/*
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* NB: for BIO_READ, this loop is only traversed once.
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*/
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while (resid > 0) {
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if (page > sc->pagecount) {
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berr = EINVAL;
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goto out;
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}
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addr = page << sc->pageoffset;
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if (bp->bio_cmd == BIO_WRITE) {
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if (len != sc->pagesize) {
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txBuf[0] = BUFFER_TRANSFER;
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txBuf[1] = ((addr >> 16) & 0xff);
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txBuf[2] = ((addr >> 8) & 0xff);
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txBuf[3] = 0;
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cmd.tx_data_sz = cmd.rx_data_sz = 0;
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err = SPIBUS_TRANSFER(pdev, dev,
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&cmd);
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if (err == 0)
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err = at45d_wait_ready(dev,
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&status);
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if (err != 0) {
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berr = EIO;
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goto out;
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}
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}
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txBuf[0] = PROGRAM_THROUGH_BUFFER;
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}
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addr += offset;
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txBuf[1] = ((addr >> 16) & 0xff);
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txBuf[2] = ((addr >> 8) & 0xff);
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txBuf[3] = (addr & 0xff);
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cmd.tx_data_sz = cmd.rx_data_sz = len;
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err = SPIBUS_TRANSFER(pdev, dev, &cmd);
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if (err == 0 && bp->bio_cmd != BIO_READ)
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err = at45d_wait_ready(dev, &status);
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if (err != 0) {
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berr = EIO;
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goto out;
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}
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if (bp->bio_cmd == BIO_WRITE) {
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addr = page << sc->pageoffset;
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txBuf[0] = BUFFER_COMPARE;
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txBuf[1] = ((addr >> 16) & 0xff);
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txBuf[2] = ((addr >> 8) & 0xff);
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txBuf[3] = 0;
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cmd.tx_data_sz = cmd.rx_data_sz = 0;
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err = SPIBUS_TRANSFER(pdev, dev, &cmd);
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if (err == 0)
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err = at45d_wait_ready(dev, &status);
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if (err != 0 || (status & 0x40) != 0) {
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device_printf(dev, "comparing page "
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"%d failed (status=0x%x)\n", addr,
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status);
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berr = EIO;
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goto out;
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}
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}
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page++;
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buf += len;
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offset = 0;
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resid -= len;
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if (resid > sc->pagesize)
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len = sc->pagesize;
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else
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len = resid;
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cmd.tx_data = cmd.rx_data = buf;
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}
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out:
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if (berr != 0) {
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bp->bio_flags |= BIO_ERROR;
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bp->bio_error = berr;
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}
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bp->bio_resid = resid;
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biodone(bp);
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}
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}
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static devclass_t at45d_devclass;
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static device_method_t at45d_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, at45d_probe),
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DEVMETHOD(device_attach, at45d_attach),
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DEVMETHOD(device_detach, at45d_detach),
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DEVMETHOD_END
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};
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static driver_t at45d_driver = {
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"at45d",
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at45d_methods,
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sizeof(struct at45d_softc),
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};
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DRIVER_MODULE(at45d, spibus, at45d_driver, at45d_devclass, NULL, NULL);
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